FLTK 1.3.4
Fl_Tree Class Reference

Tree widget. More...

#include <Fl_Tree.H>

Inheritance diagram for Fl_Tree:
Fl_Group Fl_Widget

Public Member Functions

Fl_Tree_Itemadd (const char *path, Fl_Tree_Item *newitem=0)
 Adds a new item, given a menu style 'path'. More...
 
Fl_Tree_Itemadd (Fl_Tree_Item *parent_item, const char *name)
 Add a new child item labeled 'name' to the specified 'parent_item'. More...
 
void calc_dimensions ()
 Recalculate widget dimensions and scrollbar visibility, normally managed automatically. More...
 
void calc_tree ()
 Recalculates the tree's sizes and scrollbar visibility, normally managed automatically. More...
 
void callback_item (Fl_Tree_Item *item)
 Sets the item that was changed for this callback. More...
 
Fl_Tree_Itemcallback_item ()
 Gets the item that caused the callback. More...
 
void callback_reason (Fl_Tree_Reason reason)
 Sets the reason for this callback. More...
 
Fl_Tree_Reason callback_reason () const
 Gets the reason for this callback. More...
 
void clear ()
 Clear the entire tree's children, including the root. More...
 
void clear_children (Fl_Tree_Item *item)
 Clear all the children for 'item'. More...
 
int close (Fl_Tree_Item *item, int docallback=1)
 Closes the specified 'item'. More...
 
int close (const char *path, int docallback=1)
 Closes the item specified by 'path'. More...
 
Fl_Imagecloseicon () const
 Returns the icon to be used as the 'close' icon. More...
 
void closeicon (Fl_Image *val)
 Sets the icon to be used as the 'close' icon. More...
 
Fl_Color connectorcolor () const
 Get the connector color used for tree connection lines.
 
void connectorcolor (Fl_Color val)
 Set the connector color used for tree connection lines.
 
Fl_Tree_Connector connectorstyle () const
 Returns the line drawing style for inter-connecting items.
 
void connectorstyle (Fl_Tree_Connector val)
 Sets the line drawing style for inter-connecting items. More...
 
int connectorwidth () const
 Gets the width of the horizontal connection lines (in pixels) that appear to the left of each tree item's label.
 
void connectorwidth (int val)
 Sets the width of the horizontal connection lines (in pixels) that appear to the left of each tree item's label.
 
int deselect (Fl_Tree_Item *item, int docallback=1)
 Deselect the specified item. More...
 
int deselect (const char *path, int docallback=1)
 Deselect an item specified by 'path'. More...
 
int deselect_all (Fl_Tree_Item *item=0, int docallback=1)
 Deselect 'item' and all its children. More...
 
void display (Fl_Tree_Item *item)
 Displays 'item', scrolling the tree as necessary. More...
 
int displayed (Fl_Tree_Item *item)
 See if 'item' is currently displayed on-screen (visible within the widget). More...
 
void draw ()
 Standard FLTK draw() method, handles drawing the tree widget.
 
int extend_selection (Fl_Tree_Item *from, Fl_Tree_Item *to, int val=1, bool visible=false)
 Extend a selection between 'from' and 'to' depending on 'visible'. More...
 
int extend_selection_dir (Fl_Tree_Item *from, Fl_Tree_Item *to, int dir, int val, bool visible)
 Extend the selection between and including 'from' and 'to' depending on direction 'dir', 'val', and 'visible'. More...
 
const Fl_Tree_Itemfind_clicked (int yonly=0) const
 Find the item that was last clicked on. More...
 
Fl_Tree_Itemfind_clicked (int yonly=0)
 Non-const version of Fl_Tree::find_clicked(int yonly) const.
 
Fl_Tree_Itemfind_item (const char *path)
 Non-const version of Fl_Tree::find_item(const char *path) const.
 
const Fl_Tree_Itemfind_item (const char *path) const
 Find the item, given a menu style path, e.g. More...
 
Fl_Tree_Itemfirst ()
 Returns the first item in the tree, or 0 if none. More...
 
Fl_Tree_Itemfirst_selected_item ()
 Returns the first selected item in the tree. More...
 
Fl_Tree_Itemfirst_visible ()
 Returns the first open(), visible item in the tree, or 0 if none. More...
 
Fl_Tree_Itemfirst_visible_item ()
 Returns the first open(), visible item in the tree, or 0 if none. More...
 
 Fl_Tree (int X, int Y, int W, int H, const char *L=0)
 Constructor.
 
Fl_Tree_Itemget_item_focus () const
 Get the item that currently has keyboard focus.
 
int get_selected_items (Fl_Tree_Item_Array &ret_items)
 Returns the currently selected items as an array of 'ret_items'. More...
 
int handle (int e)
 Standard FLTK event handler for this widget. More...
 
int hposition () const
 Returns the horizontal scroll position as a pixel offset. More...
 
void hposition (int pos)
 Sets the horizontal scroll offset to position 'pos'. More...
 
Fl_Tree_Iteminsert (Fl_Tree_Item *item, const char *name, int pos)
 Insert a new item 'name' into 'item's children at position 'pos'. More...
 
Fl_Tree_Iteminsert_above (Fl_Tree_Item *above, const char *name)
 Inserts a new item 'name' above the specified Fl_Tree_Item 'above'. More...
 
int is_close (Fl_Tree_Item *item) const
 See if the specified 'item' is closed. More...
 
int is_close (const char *path) const
 See if item specified by 'path' is closed. More...
 
int is_hscroll_visible () const
 See if the horizontal scrollbar is currently visible. More...
 
int is_open (Fl_Tree_Item *item) const
 See if 'item' is open. More...
 
int is_open (const char *path) const
 See if item specified by 'path' is open. More...
 
int is_scrollbar (Fl_Widget *w)
 See if widget 'w' is one of the Fl_Tree widget's scrollbars. More...
 
int is_selected (Fl_Tree_Item *item) const
 See if the specified 'item' is selected. More...
 
int is_selected (const char *path)
 See if item specified by 'path' is selected. More...
 
int is_vscroll_visible () const
 See if the vertical scrollbar is currently visible. More...
 
Fl_Tree_Itemitem_clicked ()
 Return the item that was last clicked. More...
 
Fl_Tree_Item_Draw_Mode item_draw_mode () const
 Get the 'item draw mode' used for the tree. More...
 
void item_draw_mode (Fl_Tree_Item_Draw_Mode mode)
 Set the 'item draw mode' used for the tree to 'mode'. More...
 
void item_draw_mode (int mode)
 Set the 'item draw mode' used for the tree to integer 'mode'. More...
 
Fl_Color item_labelbgcolor (void) const
 Get the default label background color used for creating new items. More...
 
void item_labelbgcolor (Fl_Color val)
 Set the default label background color used for creating new items. More...
 
Fl_Color item_labelfgcolor (void) const
 Get the default label foreground color used for creating new items.
 
void item_labelfgcolor (Fl_Color val)
 Set the default label foreground color used for creating new items. More...
 
Fl_Font item_labelfont () const
 Get the default font face used for creating new items.
 
void item_labelfont (Fl_Font val)
 Set the default font face used for creating new items. More...
 
Fl_Fontsize item_labelsize () const
 Get the default label fontsize used for creating new items.
 
void item_labelsize (Fl_Fontsize val)
 Set the default label font size used for creating new items. More...
 
int item_pathname (char *pathname, int pathnamelen, const Fl_Tree_Item *item) const
 Return 'pathname' of size 'pathnamelen' for the specified 'item'. More...
 
Fl_Tree_Item_Reselect_Mode item_reselect_mode () const
 Returns the current item re/selection mode. More...
 
void item_reselect_mode (Fl_Tree_Item_Reselect_Mode mode)
 Sets the item re/selection mode. More...
 
int labelmarginleft () const
 Get the amount of white space (in pixels) that should appear to the left of the label text. More...
 
void labelmarginleft (int val)
 Set the amount of white space (in pixels) that should appear to the left of the label text. More...
 
Fl_Tree_Itemlast ()
 Returns the last item in the tree. More...
 
Fl_Tree_Itemlast_selected_item ()
 Returns the last selected item in the tree. More...
 
Fl_Tree_Itemlast_visible ()
 Returns the last open(), visible item in the tree. More...
 
Fl_Tree_Itemlast_visible_item ()
 Returns the last open(), visible item in the tree. More...
 
int linespacing () const
 Get the amount of white space (in pixels) that should appear between items in the tree.
 
void linespacing (int val)
 Sets the amount of white space (in pixels) that should appear between items in the tree.
 
void load (class Fl_Preferences &)
 Load FLTK preferences. More...
 
int marginbottom () const
 Get the amount of white space (in pixels) that should appear below the last visible item when the vertical scroller is scrolled to the bottom.
 
void marginbottom (int val)
 Sets the amount of white space (in pixels) that should appear below the last visible item when the vertical scroller is scrolled to the bottom.
 
int marginleft () const
 Get the amount of white space (in pixels) that should appear between the widget's left border and the tree's contents.
 
void marginleft (int val)
 Set the amount of white space (in pixels) that should appear between the widget's left border and the left side of the tree's contents.
 
int margintop () const
 Get the amount of white space (in pixels) that should appear between the widget's top border and the top of the tree's contents.
 
void margintop (int val)
 Sets the amount of white space (in pixels) that should appear between the widget's top border and the top of the tree's contents.
 
Fl_Tree_Itemnext (Fl_Tree_Item *item=0)
 Return the next item after 'item', or 0 if no more items. More...
 
Fl_Tree_Itemnext_item (Fl_Tree_Item *item, int dir=FL_Down, bool visible=false)
 Returns next item after 'item' in direction 'dir' depending on 'visible'. More...
 
Fl_Tree_Itemnext_selected_item (Fl_Tree_Item *item=0, int dir=FL_Down)
 Returns the next selected item above or below 'item', depending on 'dir'. More...
 
Fl_Tree_Itemnext_visible_item (Fl_Tree_Item *start, int dir)
 Returns next open(), visible item above (dir==FL_Up) or below (dir==FL_Down) the specified 'item', or 0 if no more items. More...
 
int open (Fl_Tree_Item *item, int docallback=1)
 Open the specified 'item'. More...
 
int open (const char *path, int docallback=1)
 Opens the item specified by 'path'. More...
 
void open_toggle (Fl_Tree_Item *item, int docallback=1)
 Toggle the open state of 'item'. More...
 
int openchild_marginbottom () const
 Get the amount of white space (in pixels) that should appear below an open child tree's contents.
 
void openchild_marginbottom (int val)
 Set the amount of white space (in pixels) that should appear below an open child tree's contents.
 
Fl_Imageopenicon () const
 Returns the icon to be used as the 'open' icon. More...
 
void openicon (Fl_Image *val)
 Sets the icon to be used as the 'open' icon. More...
 
const Fl_Tree_Prefsprefs () const
 
Fl_Tree_Itemprev (Fl_Tree_Item *item=0)
 Return the previous item before 'item', or 0 if no more items. More...
 
void recalc_tree ()
 Schedule tree to recalc the entire tree size. More...
 
int remove (Fl_Tree_Item *item)
 Remove the specified 'item' from the tree. More...
 
void resize (int, int, int, int)
 Resizes the Fl_Group widget and all of its children. More...
 
Fl_Tree_Itemroot ()
 Returns the root item.
 
void root (Fl_Tree_Item *newitem)
 Sets the root item to 'newitem'. More...
 
void root_label (const char *new_label)
 Set the label for the root item to 'new_label'. More...
 
int scrollbar_size () const
 Gets the default size of scrollbars' troughs for this widget in pixels. More...
 
void scrollbar_size (int size)
 Sets the pixel size of the scrollbars' troughs to 'size' for this widget, in pixels. More...
 
int select (Fl_Tree_Item *item, int docallback=1)
 Select the specified 'item'. More...
 
int select (const char *path, int docallback=1)
 Select the item specified by 'path'. More...
 
int select_all (Fl_Tree_Item *item=0, int docallback=1)
 Select 'item' and all its children. More...
 
int select_only (Fl_Tree_Item *selitem, int docallback=1)
 Select only the specified item, deselecting all others that might be selected. More...
 
void select_toggle (Fl_Tree_Item *item, int docallback=1)
 Toggle the select state of the specified 'item'. More...
 
Fl_Boxtype selectbox () const
 Sets the style of box used to draw selected items. More...
 
void selectbox (Fl_Boxtype val)
 Gets the style of box used to draw selected items. More...
 
Fl_Tree_Select selectmode () const
 Gets the tree's current selection mode. More...
 
void selectmode (Fl_Tree_Select val)
 Sets the tree's selection mode. More...
 
void set_item_focus (Fl_Tree_Item *item)
 Set the item that currently should have keyboard focus. More...
 
void show_item (Fl_Tree_Item *item, int yoff)
 Adjust the vertical scrollbar so that 'item' is visible 'yoff' pixels from the top of the Fl_Tree widget's display. More...
 
void show_item (Fl_Tree_Item *item)
 Adjust the vertical scrollbar to show 'item' at the top of the display IF it is currently off-screen (for instance show_item_top()). More...
 
void show_item_bottom (Fl_Tree_Item *item)
 Adjust the vertical scrollbar so that 'item' is at the bottom of the display. More...
 
void show_item_middle (Fl_Tree_Item *item)
 Adjust the vertical scrollbar so that 'item' is in the middle of the display. More...
 
void show_item_top (Fl_Tree_Item *item)
 Adjust the vertical scrollbar so that 'item' is at the top of the display. More...
 
void show_self ()
 Print the tree as 'ascii art' to stdout. More...
 
int showcollapse () const
 Returns 1 if the collapse icon is enabled, 0 if not. More...
 
void showcollapse (int val)
 Set if we should show the collapse icon or not. More...
 
int showroot () const
 Returns 1 if the root item is to be shown, or 0 if not.
 
void showroot (int val)
 Set if the root item should be shown or not. More...
 
Fl_Tree_Sort sortorder () const
 Set the default sort order used when items are added to the tree. More...
 
void sortorder (Fl_Tree_Sort val)
 Gets the sort order used to add items to the tree.
 
Fl_Imageusericon () const
 Returns the Fl_Image being used as the default user icon for all newly created items. More...
 
void usericon (Fl_Image *val)
 Sets the Fl_Image to be used as the default user icon for all newly created items. More...
 
int usericonmarginleft () const
 Get the amount of white space (in pixels) that should appear to the left of the usericon. More...
 
void usericonmarginleft (int val)
 Set the amount of white space (in pixels) that should appear to the left of the usericon. More...
 
int vposition () const
 Returns the vertical scroll position as a pixel offset. More...
 
void vposition (int pos)
 Sets the vertical scroll offset to position 'pos'. More...
 
int widgetmarginleft () const
 Get the amount of white space (in pixels) that should appear to the left of the child fltk widget (if any). More...
 
void widgetmarginleft (int val)
 Set the amount of white space (in pixels) that should appear to the left of the child fltk widget (if any). More...
 
 ~Fl_Tree ()
 Destructor.
 
- Public Member Functions inherited from Fl_Group
Fl_Widget *& _ddfdesign_kludge ()
 This is for forms compatibility only.
 
void add (Fl_Widget &)
 The widget is removed from its current group (if any) and then added to the end of this group.
 
void add (Fl_Widget *o)
 See void Fl_Group::add(Fl_Widget &w)
 
void add_resizable (Fl_Widget &o)
 Adds a widget to the group and makes it the resizable widget.
 
Fl_Widget *const * array () const
 Returns a pointer to the array of children. More...
 
virtual Fl_Groupas_group ()
 Returns an Fl_Group pointer if this widget is an Fl_Group. More...
 
void begin ()
 Sets the current group so you can build the widget tree by just constructing the widgets. More...
 
Fl_Widgetchild (int n) const
 Returns array()[n]. More...
 
int children () const
 Returns how many child widgets the group has.
 
void clear ()
 Deletes all child widgets from memory recursively. More...
 
void clip_children (int c)
 Controls whether the group widget clips the drawing of child widgets to its bounding box. More...
 
unsigned int clip_children ()
 Returns the current clipping mode. More...
 
void end ()
 Exactly the same as current(this->parent()). More...
 
int find (const Fl_Widget *) const
 Searches the child array for the widget and returns the index. More...
 
int find (const Fl_Widget &o) const
 See int Fl_Group::find(const Fl_Widget *w) const.
 
 Fl_Group (int, int, int, int, const char *=0)
 Creates a new Fl_Group widget using the given position, size, and label string. More...
 
void focus (Fl_Widget *W)
 
void forms_end ()
 This is for forms compatibility only.
 
void init_sizes ()
 Resets the internal array of widget sizes and positions. More...
 
void insert (Fl_Widget &, int i)
 The widget is removed from its current group (if any) and then inserted into this group. More...
 
void insert (Fl_Widget &o, Fl_Widget *before)
 This does insert(w, find(before)). More...
 
void remove (int index)
 Removes the widget at index from the group but does not delete it. More...
 
void remove (Fl_Widget &)
 Removes a widget from the group but does not delete it. More...
 
void remove (Fl_Widget *o)
 Removes the widget o from the group. More...
 
void resizable (Fl_Widget &o)
 See void Fl_Group::resizable(Fl_Widget *box)
 
void resizable (Fl_Widget *o)
 The resizable widget defines the resizing box for the group. More...
 
Fl_Widgetresizable () const
 See void Fl_Group::resizable(Fl_Widget *box)
 
virtual ~Fl_Group ()
 The destructor also deletes all the children. More...
 
- Public Member Functions inherited from Fl_Widget
void _clear_fullscreen ()
 
void _set_fullscreen ()
 
void activate ()
 Activates the widget. More...
 
unsigned int active () const
 Returns whether the widget is active. More...
 
int active_r () const
 Returns whether the widget and all of its parents are active. More...
 
Fl_Align align () const
 Gets the label alignment. More...
 
void align (Fl_Align alignment)
 Sets the label alignment. More...
 
long argument () const
 Gets the current user data (long) argument that is passed to the callback function. More...
 
void argument (long v)
 Sets the current user data (long) argument that is passed to the callback function. More...
 
virtual class Fl_Gl_Windowas_gl_window ()
 Returns an Fl_Gl_Window pointer if this widget is an Fl_Gl_Window. More...
 
virtual Fl_Windowas_window ()
 Returns an Fl_Window pointer if this widget is an Fl_Window. More...
 
Fl_Boxtype box () const
 Gets the box type of the widget. More...
 
void box (Fl_Boxtype new_box)
 Sets the box type for the widget. More...
 
Fl_Callback_p callback () const
 Gets the current callback function for the widget. More...
 
void callback (Fl_Callback *cb, void *p)
 Sets the current callback function for the widget. More...
 
void callback (Fl_Callback *cb)
 Sets the current callback function for the widget. More...
 
void callback (Fl_Callback0 *cb)
 Sets the current callback function for the widget. More...
 
void callback (Fl_Callback1 *cb, long p=0)
 Sets the current callback function for the widget. More...
 
unsigned int changed () const
 Checks if the widget value changed since the last callback. More...
 
void clear_active ()
 Marks the widget as inactive without sending events or changing focus. More...
 
void clear_changed ()
 Marks the value of the widget as unchanged. More...
 
void clear_damage (uchar c=0)
 Clears or sets the damage flags. More...
 
void clear_output ()
 Sets a widget to accept input. More...
 
void clear_visible ()
 Hides the widget. More...
 
void clear_visible_focus ()
 Disables keyboard focus navigation with this widget. More...
 
Fl_Color color () const
 Gets the background color of the widget. More...
 
void color (Fl_Color bg)
 Sets the background color of the widget. More...
 
void color (Fl_Color bg, Fl_Color sel)
 Sets the background and selection color of the widget. More...
 
Fl_Color color2 () const
 For back compatibility only. More...
 
void color2 (unsigned a)
 For back compatibility only. More...
 
int contains (const Fl_Widget *w) const
 Checks if w is a child of this widget. More...
 
void copy_label (const char *new_label)
 Sets the current label. More...
 
void copy_tooltip (const char *text)
 Sets the current tooltip text. More...
 
uchar damage () const
 Returns non-zero if draw() needs to be called. More...
 
void damage (uchar c)
 Sets the damage bits for the widget. More...
 
void damage (uchar c, int x, int y, int w, int h)
 Sets the damage bits for an area inside the widget. More...
 
int damage_resize (int, int, int, int)
 Internal use only. More...
 
void deactivate ()
 Deactivates the widget. More...
 
Fl_Imagedeimage ()
 Gets the image that is used as part of the widget label. More...
 
const Fl_Imagedeimage () const
 
void deimage (Fl_Image *img)
 Sets the image to use as part of the widget label. More...
 
void deimage (Fl_Image &img)
 Sets the image to use as part of the widget label. More...
 
void do_callback ()
 Calls the widget callback. More...
 
void do_callback (Fl_Widget *o, long arg)
 Calls the widget callback. More...
 
void do_callback (Fl_Widget *o, void *arg=0)
 Calls the widget callback. More...
 
void draw_label (int, int, int, int, Fl_Align) const
 Draws the label in an arbitrary bounding box with an arbitrary alignment. More...
 
int h () const
 Gets the widget height. More...
 
virtual void hide ()
 Makes a widget invisible. More...
 
Fl_Imageimage ()
 Gets the image that is used as part of the widget label. More...
 
const Fl_Imageimage () const
 
void image (Fl_Image *img)
 Sets the image to use as part of the widget label. More...
 
void image (Fl_Image &img)
 Sets the image to use as part of the widget label. More...
 
int inside (const Fl_Widget *wgt) const
 Checks if this widget is a child of wgt. More...
 
int is_label_copied () const
 Returns whether the current label was assigned with copy_label(). More...
 
const char * label () const
 Gets the current label text. More...
 
void label (const char *text)
 Sets the current label pointer. More...
 
void label (Fl_Labeltype a, const char *b)
 Shortcut to set the label text and type in one call. More...
 
Fl_Color labelcolor () const
 Gets the label color. More...
 
void labelcolor (Fl_Color c)
 Sets the label color. More...
 
Fl_Font labelfont () const
 Gets the font to use. More...
 
void labelfont (Fl_Font f)
 Sets the font to use. More...
 
Fl_Fontsize labelsize () const
 Gets the font size in pixels. More...
 
void labelsize (Fl_Fontsize pix)
 Sets the font size in pixels. More...
 
Fl_Labeltype labeltype () const
 Gets the label type. More...
 
void labeltype (Fl_Labeltype a)
 Sets the label type. More...
 
void measure_label (int &ww, int &hh) const
 Sets width ww and height hh accordingly with the label size. More...
 
unsigned int output () const
 Returns if a widget is used for output only. More...
 
Fl_Groupparent () const
 Returns a pointer to the parent widget. More...
 
void parent (Fl_Group *p)
 Internal use only - "for hacks only". More...
 
void position (int X, int Y)
 Repositions the window or widget. More...
 
void redraw ()
 Schedules the drawing of the widget. More...
 
void redraw_label ()
 Schedules the drawing of the label. More...
 
Fl_Color selection_color () const
 Gets the selection color. More...
 
void selection_color (Fl_Color a)
 Sets the selection color. More...
 
void set_active ()
 Marks the widget as active without sending events or changing focus. More...
 
void set_changed ()
 Marks the value of the widget as changed. More...
 
void set_output ()
 Sets a widget to output only. More...
 
void set_visible ()
 Makes the widget visible. More...
 
void set_visible_focus ()
 Enables keyboard focus navigation with this widget. More...
 
virtual void show ()
 Makes a widget visible. More...
 
void size (int W, int H)
 Changes the size of the widget. More...
 
int take_focus ()
 Gives the widget the keyboard focus. More...
 
unsigned int takesevents () const
 Returns if the widget is able to take events. More...
 
int test_shortcut ()
 Returns true if the widget's label contains the entered '&x' shortcut. More...
 
const char * tooltip () const
 Gets the current tooltip text. More...
 
void tooltip (const char *text)
 Sets the current tooltip text. More...
 
Fl_Windowtop_window () const
 Returns a pointer to the top-level window for the widget. More...
 
Fl_Windowtop_window_offset (int &xoff, int &yoff) const
 Finds the x/y offset of the current widget relative to the top-level window. More...
 
uchar type () const
 Gets the widget type. More...
 
void type (uchar t)
 Sets the widget type. More...
 
int use_accents_menu ()
 Returns non zero if MAC_USE_ACCENTS_MENU flag is set, 0 otherwise.
 
void * user_data () const
 Gets the user data for this widget. More...
 
void user_data (void *v)
 Sets the user data for this widget. More...
 
unsigned int visible () const
 Returns whether a widget is visible. More...
 
void visible_focus (int v)
 Modifies keyboard focus navigation. More...
 
unsigned int visible_focus ()
 Checks whether this widget has a visible focus. More...
 
int visible_r () const
 Returns whether a widget and all its parents are visible. More...
 
int w () const
 Gets the widget width. More...
 
Fl_When when () const
 Returns the conditions under which the callback is called. More...
 
void when (uchar i)
 Sets the flags used to decide when a callback is called. More...
 
Fl_Windowwindow () const
 Returns a pointer to the nearest parent window up the widget hierarchy. More...
 
int x () const
 Gets the widget position in its window. More...
 
int y () const
 Gets the widget position in its window. More...
 
virtual ~Fl_Widget ()
 Destroys the widget. More...
 

Protected Member Functions

void do_callback_for_item (Fl_Tree_Item *item, Fl_Tree_Reason reason)
 Do the callback for the specified 'item' using 'reason', setting the callback_item() and callback_reason().
 
void item_clicked (Fl_Tree_Item *val)
 Set the item that was last clicked. More...
 
- Protected Member Functions inherited from Fl_Group
void draw_child (Fl_Widget &widget) const
 Forces a child to redraw. More...
 
void draw_children ()
 Draws all children of the group. More...
 
void draw_outside_label (const Fl_Widget &widget) const
 Parents normally call this to draw outside labels of child widgets. More...
 
int * sizes ()
 Returns the internal array of widget sizes and positions. More...
 
void update_child (Fl_Widget &widget) const
 Draws a child only if it needs it. More...
 
- Protected Member Functions inherited from Fl_Widget
void clear_flag (unsigned int c)
 Clears a flag in the flags mask.
 
void draw_backdrop () const
 If FL_ALIGN_IMAGE_BACKDROP is set, the image or deimage will be drawn.
 
void draw_box () const
 Draws the widget box according its box style.
 
void draw_box (Fl_Boxtype t, Fl_Color c) const
 Draws a box of type t, of color c at the widget's position and size. More...
 
void draw_box (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color c) const
 Draws a box of type t, of color c at the position X,Y and size W,H. More...
 
void draw_focus ()
 draws a focus rectangle around the widget
 
void draw_focus (Fl_Boxtype t, int x, int y, int w, int h) const
 Draws a focus box for the widget at the given position and size.
 
void draw_label () const
 Draws the widget's label at the defined label position. More...
 
void draw_label (int, int, int, int) const
 Draws the label in an arbitrary bounding box. More...
 
 Fl_Widget (int x, int y, int w, int h, const char *label=0L)
 Creates a widget at the given position and size. More...
 
unsigned int flags () const
 Gets the widget flags mask.
 
void h (int v)
 Internal use only. More...
 
void set_flag (unsigned int c)
 Sets a flag in the flags mask.
 
void w (int v)
 Internal use only. More...
 
void x (int v)
 Internal use only. More...
 
void y (int v)
 Internal use only. More...
 

Protected Attributes

Fl_Scrollbar_hscroll
 Horizontal scrollbar.
 
int _tih
 Tree widget inner xywh dimension: inside borders + scrollbars.
 
int _tiw
 
int _tix
 
int _tiy
 
int _toh
 Tree widget outer xywh dimension: outside scrollbars, inside widget border.
 
int _tow
 
int _tox
 
int _toy
 
int _tree_h
 the calculated height of the entire tree hierarchy. See calc_tree()
 
int _tree_w
 the calculated width of the entire tree hierarchy. See calc_tree()
 
Fl_Scrollbar_vscroll
 Vertical scrollbar.
 

Friends

class Fl_Tree_Item
 

Additional Inherited Members

- Static Public Member Functions inherited from Fl_Group
static Fl_Groupcurrent ()
 Returns the currently active group. More...
 
static void current (Fl_Group *g)
 Sets the current group. More...
 
- Static Public Member Functions inherited from Fl_Widget
static void default_callback (Fl_Widget *cb, void *d)
 The default callback for all widgets that don't set a callback. More...
 
static unsigned int label_shortcut (const char *t)
 Returns the Unicode value of the '&x' shortcut in a given text. More...
 
static int test_shortcut (const char *, const bool require_alt=false)
 Returns true if the given text t contains the entered '&x' shortcut. More...
 
- Protected Types inherited from Fl_Widget
enum  {
  INACTIVE = 1<<0, INVISIBLE = 1<<1, OUTPUT = 1<<2, NOBORDER = 1<<3,
  FORCE_POSITION = 1<<4, NON_MODAL = 1<<5, SHORTCUT_LABEL = 1<<6, CHANGED = 1<<7,
  OVERRIDE = 1<<8, VISIBLE_FOCUS = 1<<9, COPIED_LABEL = 1<<10, CLIP_CHILDREN = 1<<11,
  MENU_WINDOW = 1<<12, TOOLTIP_WINDOW = 1<<13, MODAL = 1<<14, NO_OVERLAY = 1<<15,
  GROUP_RELATIVE = 1<<16, COPIED_TOOLTIP = 1<<17, FULLSCREEN = 1<<18, MAC_USE_ACCENTS_MENU = 1<<19,
  USERFLAG3 = 1<<29, USERFLAG2 = 1<<30, USERFLAG1 = 1<<31
}
 flags possible values enumeration. More...
 

Detailed Description

Tree widget.

tree-simple.png
Fl_Tree example program
Fl_Tree // Top level widget
|--- Fl_Tree_Item // Items in the tree
|--- Fl_Tree_Prefs // Preferences for the tree
|--- Fl_Tree_Connector (enum) // Connection modes
|--- Fl_Tree_Select (enum) // Selection modes
|--- Fl_Tree_Sort (enum) // Sort behavior

Similar to Fl_Browser, Fl_Tree is a browser of Fl_Tree_Item's arranged in a parented hierarchy, or 'tree'. Subtrees can be expanded or closed. Items can be added, deleted, inserted, sorted and re-ordered.

The tree items may also contain other FLTK widgets, like buttons, input fields, or even "custom" widgets.

The callback() is invoked depending on the value of when():

- FL_WHEN_RELEASE -- callback invoked when left mouse button is released on an item
- FL_WHEN_CHANGED -- callback invoked when left mouse changes selection state

The simple way to define a tree:

#include <FL/Fl_Tree.H>
[..]
Fl_Tree tree(X,Y,W,H);
tree.begin();
tree.add("Flintstones/Fred");
tree.add("Flintstones/Wilma");
tree.add("Flintstones/Pebbles");
tree.add("Simpsons/Homer");
tree.add("Simpsons/Marge");
tree.add("Simpsons/Bart");
tree.add("Simpsons/Lisa");
tree.end();
FEATURES
Items can be added with add(),
removed with remove(),
completely cleared with clear(),
inserted with insert() and insert_above(),
selected/deselected with select() and deselect(),
open/closed with open() and close(),
positioned on the screen with show_item_top(), show_item_middle() and show_item_bottom(),
item children can be swapped around with Fl_Tree_Item::swap_children(),
sorting can be controlled when items are add()ed via sortorder().
You can walk the entire tree with first() and next().
You can walk visible items with first_visible_item() and next_visible_item().
You can walk selected items with first_selected_item() and next_selected_item().
Items can be found by their pathname using find_item(const char*), and an item's pathname can be found with item_pathname().
The selected items' colors are controlled by selection_color() (inherited from Fl_Widget).
A hook is provided to allow you to redefine how item's labels are drawn via Fl_Tree::item_draw_callback().
SELECTION OF ITEMS
The tree can have different selection behaviors controlled by selectmode(). The background color used for selected items is the Fl_Tree::selection_color(). The foreground color for selected items is controlled internally with fl_contrast().
CHILD WIDGETS
FLTK widgets (including custom widgets) can be assigned to tree items via Fl_Tree_Item::widget().
When an Fl_Tree_Item::widget() is defined, the default behavior is for the widget() to be shown in place of the item's label (if it has one). Only the widget()'s width will be used; the widget()'s x() and y() position will be managed by the tree, and the h() will track the item's height. This default behavior can be altered (ABI 1.3.1): Setting Fl_Tree::item_draw_mode()'s FL_TREE_ITEM_DRAW_LABEL_AND_WIDGET flag causes the label + widget to be displayed together in that order, and adding the FL_TREE_ITEM_HEIGHT_FROM_WIDGET flag causes widget's height to define the widget()'s height.
ICONS
The tree's open/close icons can be redefined with Fl_Tree::openicon(), Fl_Tree::closeicon(). User icons can either be changed globally with Fl_Tree::usericon(), or on a per-item basis with Fl_Tree_Item::usericon().
Various default preferences can be globally manipulated via Fl_Tree_Prefs, including colors, margins, icons, connection lines, etc.
FONTS AND COLORS
When adding new items to the tree, the new items get the defaults for fonts and colors from:
Each item (Fl_Tree_Item) inherits a copy of these font/color attributes when created, and each item has its own methods to let the app change these values on a per-item basis using methods of the same name:
CALLBACKS
The tree's callback() will be invoked when items change state or are open/closed. when() controls when mouse/keyboard events invoke the callback. callback_item() and callback_reason() can be used to determine the cause of the callback. e.g.
void MyTreeCallback(Fl_Widget *w, void *data) {
Fl_Tree *tree = (Fl_Tree*)w;
Fl_Tree_Item *item = (Fl_Tree_Item*)tree->callback_item(); // get selected item
switch ( tree->callback_reason() ) {
}
SIMPLE EXAMPLES
To find all the selected items:
printf("Item %s is selected\n", i->label());
To get an item's full menu pathname, use Fl_Tree::item_pathname(), e.g.
char pathname[256] = "???";
tree->item_pathname(pathname, sizeof(pathname), item); // eg. "Parent/Child/Item"
To walk all the items of the tree from top to bottom:
// Walk all the items in the tree, and print their labels
for ( Fl_Tree_Item *item = tree->first(); item; item = tree->next(item) ) {
printf("Item: %s\n", item->label());
}
To recursively walk all the children of a particular item, define a function that uses recursion:
// Find all of the item's children and print an indented report of their labels
void my_print_all_children(Fl_Tree_Item *item, int indent=0) {
for ( int t=0; t<item->children(); t++ ) {
printf("%*s Item: %s\n", indent, "", item->child(t)->label());
my_print_all_children(item->child(t), indent+4); // recurse
}
}
To change the default label font and color when creating new items:
tree = new Fl_Tree(..);
tree->item_labelfont(FL_COURIER); // Use Courier font for all new items
tree->item_labelfgcolor(FL_RED); // Use red color for labels of all new items
[..]
// Now create the items in the tree using the above defaults.
tree->add("Aaa");
tree->add("Bbb");
[..]
To change the font and color of all existing items in the tree:
// Change the font and color of all items currently in the tree
for ( Fl_Tree_Item *item = tree->first(); item; item = tree->next(item) ) {
item->labelcolor(FL_RED);
}
DISPLAY DESCRIPTION
The following image shows the tree's various visual elements and the methods that control them:
tree-elements.png
The following shows the protected dimension variables 'tree inner' (tix..) and 'tree outer' (tox..):
tree-dimensions.png
Fl_Tree inner/outer dimensions
KEYBOARD BINDINGS
The following table lists keyboard bindings for navigating the tree:
Fl_Tree keyboard bindings.
Keyboard FL_TREE_SELECT_MULTI FL_TREE_SELECT_SINGLE

FL_TREE_SELECT_NONE

Ctrl-A (Linux/Windows)
Command-A (Mac)
Select all items. N/A

N/A

Space Selects item. Selects item.

N/A

Ctrl-Space Toggle item. Toggle item.

N/A

Shift-Space Extends selection
from last item.
Selects item.

N/A

Enter,
Ctrl-Enter,
Shift-Enter
Toggles open/close Toggles open/close

Toggles open/close

Right / Left Open/Close item. Open/Close item.

Open/Close item.

Up / Down Move focus box up/down. Move focus box up/down.

N/A

Shift-Up / Shift-Down Extend selection up/down. Move focus up/down.

N/A

Home / End Move to top/bottom of tree. Move to top/bottom of tree.

Move to top/bottom of tree.

PageUp / PageDown Page up/down. Page up/down.

Page up/down.

Member Function Documentation

Fl_Tree_Item * Fl_Tree::add ( const char *  path,
Fl_Tree_Item item = 0 
)

Adds a new item, given a menu style 'path'.

Any parent nodes that don't already exist are created automatically. Adds the item based on the value of sortorder(). If 'item' is NULL, a new item is created.

To specify items or submenus that contain slashes ('/' or '\') use an escape character to protect them, e.g.

tree->add("/Holidays/Photos/12\\/25\\/2010"); // Adds item "12/25/2010"
tree->add("/Pathnames/c:\\\\Program Files\\\\MyApp"); // Adds item "c:\Program Files\MyApp"
Parameters
[in]pathThe path to the item, e.g. "Flintstone/Fred".
[in]itemThe new item to be added. If NULL, a new item is created with a name that is the last element in 'path'.
Returns
The new item added, or 0 on error.
Version
1.3.3
Fl_Tree_Item * Fl_Tree::add ( Fl_Tree_Item parent_item,
const char *  name 
)

Add a new child item labeled 'name' to the specified 'parent_item'.

Parameters
[in]parent_itemThe parent item the new child item will be added to. Must not be NULL.
[in]nameThe label for the new item
Returns
The new item added.
Version
1.3.0 release
void Fl_Tree::calc_dimensions ( )

Recalculate widget dimensions and scrollbar visibility, normally managed automatically.

Low overhead way to update the tree widget's outer/inner dimensions and re-determine scrollbar visibility based on these changes without recalculating the entire size of the tree data.

Assumes that either the tree's size in _tree_w/_tree_h are correct so that scrollbar visibility can be calculated easily, or are both zero indicating scrollbar visibility can't be calculated yet.

This method is called when the widget is resize()ed or if the scrollbar's sizes are changed (affects tree widget's inner dimensions tix/y/w/h), and also used by calc_tree().

Version
1.3.3 ABI feature
void Fl_Tree::calc_tree ( )

Recalculates the tree's sizes and scrollbar visibility, normally managed automatically.

On return:

- _tree_w will be the overall pixel width of the entire viewable tree
- _tree_h will be the overall pixel height ""
- scrollbar visibility and pan sizes are updated
- internal _tix/_tiy/_tiw/_tih dimensions are updated

_tree_w/_tree_h include the tree's margins (e.g. marginleft()), whether items are open or closed, label contents and font sizes, etc.

The tree hierarchy's size is managed separately from the widget's size as an optimization; this way resize() on the widget doesn't involve recalculating the tree's hierarchy needlessly, as widget size has no bearing on the tree hierarchy.

The tree hierarchy's size only changes when items are added/removed, open/closed, label contents or font sizes changed, margins changed, etc.

This calculation involves walking the entire tree from top to bottom, potentially a slow calculation if the tree has many items (potentially hundreds of thousands), and should therefore be called sparingly.

For this reason, recalc_tree() is used as a way to /schedule/ calculation when changes affect the tree hierarchy's size.

Apps may want to call this method directly if the app makes changes to the tree's geometry, then immediately needs to work with the tree's new dimensions before an actual redraw (and recalc) occurs. (This use by an app should only rarely be needed)

void Fl_Tree::callback_item ( Fl_Tree_Item item)

Sets the item that was changed for this callback.

Used internally to pass the item that invoked the callback.

Fl_Tree_Item * Fl_Tree::callback_item ( )

Gets the item that caused the callback.

The callback() can use this value to see which item changed.

void Fl_Tree::callback_reason ( Fl_Tree_Reason  reason)

Sets the reason for this callback.

Used internally to pass the reason the callback was invoked.

Fl_Tree_Reason Fl_Tree::callback_reason ( ) const

Gets the reason for this callback.

The callback() can use this value to see why it was called. Example:

void MyTreeCallback(Fl_Widget *w, void *userdata) {
Fl_Tree *tree = (Fl_Tree*)w;
Fl_Tree_Item *item = tree->callback_item(); // the item changed (can be NULL if more than one item was changed!)
switch ( tree->callback_reason() ) { // reason callback was invoked
case FL_TREE_REASON_OPENED: ..item was opened..
case FL_TREE_REASON_CLOSED: ..item was closed..
case FL_TREE_REASON_SELECTED: ..item was selected..
case FL_TREE_REASON_RESELECTED: ..item was reselected (double-clicked, etc)..
case FL_TREE_REASON_DESELECTED: ..item was deselected..
}
}
See Also
item_reselect_mode() – enables FL_TREE_REASON_RESELECTED events
void Fl_Tree::clear ( )

Clear the entire tree's children, including the root.

The tree will be left completely empty.

void Fl_Tree::clear_children ( Fl_Tree_Item item)

Clear all the children for 'item'.

Item may not be NULL.

int Fl_Tree::close ( Fl_Tree_Item item,
int  docallback = 1 
)

Closes the specified 'item'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item to be closed. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 – item was closed
  • 0 – item was already closed, no change
See Also
open(), close(), is_open(), is_close(), callback_item(), callback_reason()
int Fl_Tree::close ( const char *  path,
int  docallback = 1 
)

Closes the item specified by 'path'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. close("Holidays/12\\/25\\/2010").

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 – OK: item closed
  • 0 – OK: item was already closed, no change
  • -1 – ERROR: item was not found
See Also
open(), close(), is_open(), is_close(), callback_item(), callback_reason()
Fl_Image * Fl_Tree::closeicon ( ) const

Returns the icon to be used as the 'close' icon.

If none was set, the internal default is returned, a simple '[-]' icon.

void Fl_Tree::closeicon ( Fl_Image val)

Sets the icon to be used as the 'close' icon.

This overrides the built in default '[-]' icon.

Parameters
[in]val– The new image, or zero to use the default [-] icon.
void Fl_Tree::connectorstyle ( Fl_Tree_Connector  val)

Sets the line drawing style for inter-connecting items.

See Fl_Tree_Connector for possible values.

int Fl_Tree::deselect ( Fl_Tree_Item item,
int  docallback = 1 
)

Deselect the specified item.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item to be deselected. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 0 - item was already deselected, no change was made
  • 1 - item's state was changed
int Fl_Tree::deselect ( const char *  path,
int  docallback = 1 
)

Deselect an item specified by 'path'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. deselect("Holidays/12\\/25\\/2010").

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 - OK: item's state was changed
  • 0 - OK: item was already deselected, no change was made
  • -1 - ERROR: item was not found
int Fl_Tree::deselect_all ( Fl_Tree_Item item = 0,
int  docallback = 1 
)

Deselect 'item' and all its children.

If item is NULL, first() is used.
Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]itemThe item that will be deselected (along with all its children). If NULL, first() is used.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
Count of how many items were actually changed to the deselected state.
void Fl_Tree::display ( Fl_Tree_Item item)

Displays 'item', scrolling the tree as necessary.

Parameters
[in]itemThe item to be displayed. If NULL, first() is used.
int Fl_Tree::displayed ( Fl_Tree_Item item)

See if 'item' is currently displayed on-screen (visible within the widget).

This can be used to detect if the item is scrolled off-screen. Checks to see if the item's vertical position is within the top and bottom edges of the display window. This does NOT take into account the hide() / show() or open() / close() status of the item.

Parameters
[in]itemThe item to be checked. If NULL, first() is used.
Returns
1 if displayed, 0 if scrolled off screen or no items are in tree.
int Fl_Tree::extend_selection ( Fl_Tree_Item from,
Fl_Tree_Item to,
int  val = 1,
bool  visible = false 
)

Extend a selection between 'from' and 'to' depending on 'visible'.

Similar to the more efficient extend_selection_dir(Fl_Tree_Item*,Fl_Tree_Item*,int dir,int val,bool vis) method, but direction (up or down) doesn't need to be known.
We're less efficient because we search the tree for to/from, then operate on items in between. The more efficient method avoids the "search", but necessitates a direction to be specified to find 'to'.
Used by SHIFT-click to extend a selection between two items inclusive.
Handles calling redraw() if anything changed.

Parameters
[in]fromStarting item
[in]toEnding item
[in]valSelect or deselect items (0=deselect, 1=select, 2=toggle)
[in]visibletrue=affect only open(), visible items,
false=affect open or closed items (default)
Returns
The number of items whose selection states were changed, if any.
Version
1.3.3 ABI feature
int Fl_Tree::extend_selection_dir ( Fl_Tree_Item from,
Fl_Tree_Item to,
int  dir,
int  val,
bool  visible 
)

Extend the selection between and including 'from' and 'to' depending on direction 'dir', 'val', and 'visible'.

Efficient: does not walk entire tree; starts with 'from' and stops at 'to' while moving in direction 'dir'. Dir must be specified though. If dir cannot be known in advance, such as during SHIFT-click operations, the method extend_selection(Fl_Tree_Item*,Fl_Tree_Item*,int,bool) should be used. Handles calling redraw() if anything changed.

Parameters
[in]fromStarting item
[in]toEnding item
[in]dirDirection to extend selection (FL_Up or FL_Down)
[in]val0=deselect, 1=select, 2=toggle
[in]visibletrue=affect only open(), visible items,
false=affect open or closed items (default)
Returns
The number of items whose selection states were changed, if any.
Version
1.3.3
const Fl_Tree_Item * Fl_Tree::find_clicked ( int  yonly = 0) const

Find the item that was last clicked on.

You should use callback_item() instead, which is fast, and is meant to be used within a callback to determine the item clicked.

This method walks the entire tree looking for the first item that is under the mouse. (The value of the 'yonly' flag affects whether both x and y events are checked, or just y)

Use this method /only/ if you've subclassed Fl_Tree, and are receiving events before Fl_Tree has been able to process and update callback_item().

Parameters
[in]yonly– 0: check both event's X and Y values. – 1: only check event's Y value, don't care about X.
Returns
The item clicked, or NULL if no item was under the current event.
Version
1.3.0
1.3.3 ABI feature: added yonly parameter
const Fl_Tree_Item * Fl_Tree::find_item ( const char *  path) const

Find the item, given a menu style path, e.g.

"/Parent/Child/item". There is both a const and non-const version of this method. Const version allows pure const methods to use this method to do lookups without causing compiler errors.

To specify items or submenus that contain slashes ('/' or '\') use an escape character to protect them, e.g.

tree->add("/Holidays/Photos/12\\/25\\/2010"); // Adds item "12/25/2010"
tree->add("/Pathnames/c:\\\\Program Files\\\\MyApp"); // Adds item "c:\Program Files\MyApp"
Parameters
[in]path– the tree item's pathname to be found (e.g. "Flintstones/Fred")
Returns
The item, or NULL if not found.
See Also
item_pathname()
Fl_Tree_Item * Fl_Tree::first ( )

Returns the first item in the tree, or 0 if none.

Use this to walk the tree in the forward direction, e.g.

for ( Fl_Tree_Item *item = tree->first(); item; item = tree->next(item) )
printf("Item: %s\n", item->label());
Returns
First item in tree, or 0 if none (tree empty).
See Also
first(), next(), last(), prev()
Fl_Tree_Item * Fl_Tree::first_selected_item ( )

Returns the first selected item in the tree.

Use this to walk the tree from top to bottom looking for all the selected items, e.g.

// Walk tree forward, from top to bottom
for ( Fl_Tree_Item *i=tree->first_selected_item(); i; i=tree->next_selected_item(i) )
printf("Selected item: %s\n", i->label());
Returns
The first selected item, or 0 if none.
See Also
first_selected_item(), last_selected_item(), next_selected_item()
Fl_Tree_Item * Fl_Tree::first_visible ( )

Returns the first open(), visible item in the tree, or 0 if none.

Deprecated:
in 1.3.3 ABI – use first_visible_item() instead.
Fl_Tree_Item * Fl_Tree::first_visible_item ( )

Returns the first open(), visible item in the tree, or 0 if none.

Returns
First visible item in tree, or 0 if none.
See Also
first_visible_item(), last_visible_item(), next_visible_item()
Version
1.3.3
int Fl_Tree::get_selected_items ( Fl_Tree_Item_Array ret_items)

Returns the currently selected items as an array of 'ret_items'.

Example:

// Get selected items as an array
tree->get_selected_items(items);
// Manipulate the returned array
for ( int t=0; t<items.total(); t++ ) {
Fl_Tree_Item &item = items[t];
..do stuff with each selected item..
}
Parameters
[out]ret_itemsThe returned array of selected items.
Returns
The number of items in the returned array.
See Also
first_selected_item(), next_selected_item()
Version
1.3.3 ABI feature
int Fl_Tree::handle ( int  e)
virtual

Standard FLTK event handler for this widget.

Todo:
add Fl_Widget_Tracker (see Fl_Browser_.cxx::handle())

Reimplemented from Fl_Group.

int Fl_Tree::hposition ( ) const

Returns the horizontal scroll position as a pixel offset.

The position returned is how many pixels of the tree are scrolled off the left edge of the screen.

See Also
hposition(int), vposition(), vposition(int)
Note
Must be using FLTK ABI 1.3.3 or higher for this to be effective.
void Fl_Tree::hposition ( int  pos)

Sets the horizontal scroll offset to position 'pos'.

The position is how many pixels of the tree are scrolled off the left edge of the screen.

Parameters
[in]posThe vertical position (in pixels) to scroll the tree to.
See Also
hposition(), vposition(), vposition(int)
Note
Must be using FLTK ABI 1.3.3 or higher for this to be effective.
Fl_Tree_Item * Fl_Tree::insert ( Fl_Tree_Item item,
const char *  name,
int  pos 
)

Insert a new item 'name' into 'item's children at position 'pos'.

Example:

tree->add("Aaa/000"); // "000" is index 0 in Aaa's children
tree->add("Aaa/111"); // "111" is index 1 in Aaa's children
tree->add("Aaa/222"); // "222" is index 2 in Aaa's children
..
// How to use insert() to insert a new item between Aaa/111 + Aaa/222
Fl_Tree_Item *item = tree->find_item("Aaa"); // get parent item Aaa
if (item) tree->insert(item, "New item", 2); // insert as a child of Aaa at index #2
Parameters
[in]itemThe existing item to insert new child into. Must not be NULL.
[in]nameThe label for the new item
[in]posThe position of the new item in the child list
Returns
The new item added.
See Also
insert_above()
Fl_Tree_Item * Fl_Tree::insert_above ( Fl_Tree_Item above,
const char *  name 
)

Inserts a new item 'name' above the specified Fl_Tree_Item 'above'.

Example:

tree->add("Aaa/000"); // "000" is index 0 in Aaa's children
tree->add("Aaa/111"); // "111" is index 1 in Aaa's children
tree->add("Aaa/222"); // "222" is index 2 in Aaa's children
..
// How to use insert_above() to insert a new item above Aaa/222
Fl_Tree_Item *item = tree->find_item("Aaa/222"); // get item Aaa/222
if (item) tree->insert_above(item, "New item"); // insert new item above it
Parameters
[in]above– the item above which to insert the new item. Must not be NULL.
[in]name– the name of the new item
Returns
The new item added, or 0 if 'above' could not be found.
See Also
insert()
int Fl_Tree::is_close ( Fl_Tree_Item item) const

See if the specified 'item' is closed.

Parameters
[in]item– the item to be tested. Must not be NULL.
Returns
  • 1 : item is closed
  • 0 : item is open
int Fl_Tree::is_close ( const char *  path) const

See if item specified by 'path' is closed.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. is_close("Holidays/12\\/25\\/2010").

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
Returns
  • 1 - OK: item is closed
  • 0 - OK: item is open
  • -1 - ERROR: item was not found
int Fl_Tree::is_hscroll_visible ( ) const

See if the horizontal scrollbar is currently visible.

Returns
1 if scrollbar visible, 0 if not.
Note
Must be using FLTK ABI 1.3.3 or higher for this to be effective.
int Fl_Tree::is_open ( Fl_Tree_Item item) const

See if 'item' is open.

Items that are 'open' are themselves not necessarily visible; one of the item's parents might be closed.

Parameters
[in]item– the item to be tested. Must not be NULL.
Returns
  • 1 : item is open
  • 0 : item is closed
int Fl_Tree::is_open ( const char *  path) const

See if item specified by 'path' is open.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. is_open("Holidays/12\\/25\\/2010").

Items that are 'open' are themselves not necessarily visible; one of the item's parents might be closed.

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
Returns
  • 1 - OK: item is open
  • 0 - OK: item is closed
  • -1 - ERROR: item was not found
See Also
Fl_Tree_Item::visible_r()
int Fl_Tree::is_scrollbar ( Fl_Widget w)

See if widget 'w' is one of the Fl_Tree widget's scrollbars.

Use this to skip over the scrollbars when walking the child() array. Example:

for ( int i=0; i<tree->children(); i++ ) { // walk children
Fl_Widget *w = tree->child(i);
if ( tree->is_scrollbar(w) ) continue; // skip scrollbars
..do work here..
}
Parameters
[in]wWidget to test
Returns
1 if w is a scrollbar, 0 if not.
Todo:
should be const
int Fl_Tree::is_selected ( Fl_Tree_Item item) const

See if the specified 'item' is selected.

Parameters
[in]item– the item to be tested. Must not be NULL.
Returns
  • 1 : item selected
  • 0 : item deselected
int Fl_Tree::is_selected ( const char *  path)

See if item specified by 'path' is selected.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. is_selected("Holidays/12\\/25\\/2010").

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
Returns
  • 1 : item selected
  • 0 : item deselected
  • -1 : item was not found
int Fl_Tree::is_vscroll_visible ( ) const

See if the vertical scrollbar is currently visible.

Returns
1 if scrollbar visible, 0 if not.
void Fl_Tree::item_clicked ( Fl_Tree_Item item)
protected

Set the item that was last clicked.

Should only be used by subclasses needing to change this value. Normally Fl_Tree manages this value.

Deprecated:
in 1.3.3 ABI – use callback_item() instead.
Fl_Tree_Item * Fl_Tree::item_clicked ( )

Return the item that was last clicked.

Valid only from within the callback().

Returns
The item clicked, or 0 if none. 0 may also be used to indicate several items were clicked/changed.
Deprecated:
in 1.3.3 ABI – use callback_item() instead.
Fl_Tree_Item_Draw_Mode Fl_Tree::item_draw_mode ( ) const

Get the 'item draw mode' used for the tree.

Version
1.3.1 ABI feature
void Fl_Tree::item_draw_mode ( Fl_Tree_Item_Draw_Mode  mode)

Set the 'item draw mode' used for the tree to 'mode'.

This affects how items in the tree are drawn, such as when a widget() is defined. See Fl_Tree_Item_Draw_Mode for possible values.

Version
1.3.1 ABI feature
void Fl_Tree::item_draw_mode ( int  mode)

Set the 'item draw mode' used for the tree to integer 'mode'.

This affects how items in the tree are drawn, such as when a widget() is defined. See Fl_Tree_Item_Draw_Mode for possible values.

Version
1.3.1 ABI feature
Fl_Color Fl_Tree::item_labelbgcolor ( void  ) const

Get the default label background color used for creating new items.

If the color is 0xffffffff, it is 'transparent'.

void Fl_Tree::item_labelbgcolor ( Fl_Color  val)

Set the default label background color used for creating new items.

A special case is made for color 0xffffffff (default) which is treated as 'transparent'. To change the background color on a per-item basis, use Fl_Tree_Item::labelbgcolor(Fl_Color)

void Fl_Tree::item_labelfgcolor ( Fl_Color  val)

Set the default label foreground color used for creating new items.

To change the foreground color on a per-item basis, use Fl_Tree_Item::labelfgcolor(Fl_Color)

void Fl_Tree::item_labelfont ( Fl_Font  val)

Set the default font face used for creating new items.

To change the font face on a per-item basis, use Fl_Tree_Item::labelfont(Fl_Font)

void Fl_Tree::item_labelsize ( Fl_Fontsize  val)

Set the default label font size used for creating new items.

To change the font size on a per-item basis, use Fl_Tree_Item::labelsize(Fl_Fontsize)

int Fl_Tree::item_pathname ( char *  pathname,
int  pathnamelen,
const Fl_Tree_Item item 
) const

Return 'pathname' of size 'pathnamelen' for the specified 'item'.

If 'item' is NULL, root() is used.
The tree's root will be included in the pathname if showroot() is on.
Menu items or submenus that contain slashes ('/' or '\') in their names will be escaped with a backslash. This is symmetrical with the add() function which uses the same escape pattern to set names.

Parameters
[out]pathnameThe string to use to return the pathname
[in]pathnamelenThe maximum length of the string (including NULL). Must not be zero.
[in]itemThe item whose pathname is to be returned.
Returns
  • 0 : OK (pathname returns the item's pathname)
  • -1 : item not found (pathname="")
  • -2 : pathname not large enough (pathname="")
See Also
find_item()
Fl_Tree_Item_Reselect_Mode Fl_Tree::item_reselect_mode ( ) const

Returns the current item re/selection mode.

Version
1.3.1 ABI feature
void Fl_Tree::item_reselect_mode ( Fl_Tree_Item_Reselect_Mode  mode)

Sets the item re/selection mode.

See Fl_Tree_Item_Reselect_Mode for possible values.

Version
1.3.1 ABI feature
int Fl_Tree::labelmarginleft ( ) const

Get the amount of white space (in pixels) that should appear to the left of the label text.

void Fl_Tree::labelmarginleft ( int  val)

Set the amount of white space (in pixels) that should appear to the left of the label text.

Fl_Tree_Item * Fl_Tree::last ( )

Returns the last item in the tree.

This can be used to walk the tree in reverse, e.g.

for ( Fl_Tree_Item *item = tree->last(); item; item = tree->prev() )
printf("Item: %s\n", item->label());
Returns
Last item in the tree, or 0 if none (tree empty).
See Also
first(), next(), last(), prev()
Fl_Tree_Item * Fl_Tree::last_selected_item ( )

Returns the last selected item in the tree.

Use this to walk the tree in reverse from bottom to top looking for all the selected items, e.g.

// Walk tree in reverse, from bottom to top
for ( Fl_Tree_Item *i=tree->last_selected_item(); i; i=tree->next_selected_item(i, FL_Up) )
printf("Selected item: %s\n", i->label());
Returns
The last selected item, or 0 if none.
See Also
first_selected_item(), last_selected_item(), next_selected_item()
Version
1.3.3
Fl_Tree_Item * Fl_Tree::last_visible ( )

Returns the last open(), visible item in the tree.

Deprecated:
in 1.3.3 – use last_visible_item() instead.
Fl_Tree_Item * Fl_Tree::last_visible_item ( )

Returns the last open(), visible item in the tree.

Returns
Last visible item in the tree, or 0 if none.
See Also
first_visible_item(), last_visible_item(), next_visible_item()
Version
1.3.3
void Fl_Tree::load ( class Fl_Preferences prefs)

Load FLTK preferences.

Read a preferences database into the tree widget.

A preferences database is a hierarchical collection of data which can be directly loaded into the tree view for inspection.

Parameters
[in]prefsthe Fl_Preferences database
Fl_Tree_Item * Fl_Tree::next ( Fl_Tree_Item item = 0)

Return the next item after 'item', or 0 if no more items.

Use this code to walk the entire tree:

for ( Fl_Tree_Item *i = tree->first(); i; i = tree->next(i) )
printf("Item: %s\n", i->label());
Parameters
[in]itemThe item to use to find the next item. If NULL, returns 0.
Returns
Next item in tree, or 0 if at last item.
See Also
first(), next(), last(), prev()
Fl_Tree_Item * Fl_Tree::next_item ( Fl_Tree_Item item,
int  dir = FL_Down,
bool  visible = false 
)

Returns next item after 'item' in direction 'dir' depending on 'visible'.

Next item will be above (if dir==FL_Up) or below (if dir==FL_Down). If 'visible' is true, only items whose parents are open() will be returned. If 'visible' is false, even items whose parents are close()ed will be returned.

If item is 0, the return value will be the result of this truth table:

                       visible=true           visible=false
                       -------------------    -------------
         dir=FL_Up:    last_visible_item()    last()
       dir=FL_Down:    first_visible_item()   first()
Example use:
// Walk down the tree showing open(), visible items
for ( Fl_Tree_Item *i=tree->first_visible_item(); i; i=tree->next_item(i, FL_Down, true) )
printf("Item: %s\n", i->label());
// Walk up the tree showing open(), visible items
for ( Fl_Tree_Item *i=tree->last_visible_item(); i; i=tree->next_item(i, FL_Up, true) )
printf("Item: %s\n", i->label());
// Walk down the tree showing all items (open or closed)
for ( Fl_Tree_Item *i=tree->first(); i; i=tree->next_item(i, FL_Down, false) )
printf("Item: %s\n", i->label());
// Walk up the tree showing all items (open or closed)
for ( Fl_Tree_Item *i=tree->last(); i; i=tree->next_item(i, FL_Up, false) )
printf("Item: %s\n", i->label());
Parameters
[in]itemThe item to use to find the next item. If NULL, returns 0.
[in]dirCan be FL_Up or FL_Down (default=FL_Down or 'next')
[in]visibletrue=return only open(), visible items,
false=return open or closed items (default)
Returns
Next item in tree in the direction and visibility specified, or 0 if no more items of specified visibility in that direction.
See Also
first(), last(), next(),
first_visible_item(), last_visible_item(), next_visible_item(),
first_selected_item(), last_selected_item(), next_selected_item()
Version
1.3.3
Fl_Tree_Item * Fl_Tree::next_selected_item ( Fl_Tree_Item item = 0,
int  dir = FL_Down 
)

Returns the next selected item above or below 'item', depending on 'dir'.

If 'item' is 0, search starts at either first() or last(), depending on 'dir': first() if 'dir' is FL_Down (default), last() if 'dir' is FL_Up.

Use this to walk the tree looking for all the selected items, e.g.

// Walk down the tree (forwards)
for ( Fl_Tree_Item *i=tree->first_selected_item(); i; i=tree->next_selected_item(i, FL_Down) )
printf("Item: %s\n", i->label());
// Walk up the tree (backwards)
for ( Fl_Tree_Item *i=tree->last_selected_item(); i; i=tree->next_selected_item(i, FL_Up) )
printf("Item: %s\n", i->label());
Parameters
[in]itemThe item above or below which we'll find the next selected item. If NULL, first() is used if FL_Down, last() if FL_Up. (default=NULL)
[in]dirThe direction to go. FL_Up for moving up the tree, FL_Down for down the tree (default)
Returns
The next selected item, or 0 if there are no more selected items.
See Also
first_selected_item(), last_selected_item(), next_selected_item()
Version
1.3.3
Fl_Tree_Item * Fl_Tree::next_visible_item ( Fl_Tree_Item item,
int  dir 
)

Returns next open(), visible item above (dir==FL_Up) or below (dir==FL_Down) the specified 'item', or 0 if no more items.

If 'item' is 0, returns last() if 'dir' is FL_Up, or first() if dir is FL_Down.

// Walk down the tree (forwards)
for ( Fl_Tree_Item *i=tree->first_visible_item(); i; i=tree->next_visible_item(i, FL_Down) )
printf("Item: %s\n", i->label());
// Walk up the tree (backwards)
for ( Fl_Tree_Item *i=tree->last_visible_item(); i; i=tree->next_visible_item(i, FL_Up) )
printf("Item: %s\n", i->label());
Parameters
[in]itemThe item above/below which we'll find the next visible item
[in]dirThe direction to search. Can be FL_Up or FL_Down.
Returns
The item found, or 0 if there's no visible items above/below the specified item.
Version
1.3.3
int Fl_Tree::open ( Fl_Tree_Item item,
int  docallback = 1 
)

Open the specified 'item'.

This causes the item's children (if any) to be shown.
Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item to be opened. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 – item was opened
  • 0 – item was already open, no change
See Also
open(), close(), is_open(), is_close(), callback_item(), callback_reason()
int Fl_Tree::open ( const char *  path,
int  docallback = 1 
)

Opens the item specified by 'path'.

This causes the item's children (if any) to be shown.
Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. open("Holidays/12\\/25\\/2010").

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 – OK: item opened
  • 0 – OK: item was already open, no change
  • -1 – ERROR: item was not found
See Also
open(), close(), is_open(), is_close(), callback_item(), callback_reason()
void Fl_Tree::open_toggle ( Fl_Tree_Item item,
int  docallback = 1 
)

Toggle the open state of 'item'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item whose open state is to be toggled. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
See Also
open(), close(), is_open(), is_close(), callback_item(), callback_reason()
Fl_Image * Fl_Tree::openicon ( ) const

Returns the icon to be used as the 'open' icon.

If none was set, the internal default is returned, a simple '[+]' icon.

void Fl_Tree::openicon ( Fl_Image val)

Sets the icon to be used as the 'open' icon.

This overrides the built in default '[+]' icon.

Parameters
[in]val– The new image, or zero to use the default [+] icon.
Fl_Tree_Item * Fl_Tree::prev ( Fl_Tree_Item item = 0)

Return the previous item before 'item', or 0 if no more items.

This can be used to walk the tree in reverse, e.g.

for ( Fl_Tree_Item *item = tree->first(); item; item = tree->prev(item) )
printf("Item: %s\n", item->label());
Parameters
[in]itemThe item to use to find the previous item. If NULL, returns 0.
Returns
Previous item in tree, or 0 if at first item.
See Also
first(), next(), last(), prev()
void Fl_Tree::recalc_tree ( )

Schedule tree to recalc the entire tree size.

Note
Must be using FLTK ABI 1.3.3 or higher for this to be effective.
int Fl_Tree::remove ( Fl_Tree_Item item)

Remove the specified 'item' from the tree.

item may not be NULL. If it has children, all those are removed too. If item being removed has focus, no item will have focus.

Returns
0 if done, -1 if 'item' not found.
void Fl_Tree::resize ( int  X,
int  Y,
int  W,
int  H 
)
virtual

Resizes the Fl_Group widget and all of its children.

The Fl_Group widget first resizes itself, and then it moves and resizes all its children according to the rules documented for Fl_Group::resizable(Fl_Widget*)

See Also
Fl_Group::resizable(Fl_Widget*)
Fl_Group::resizable()
Fl_Widget::resize(int,int,int,int)

Reimplemented from Fl_Group.

void Fl_Tree::root ( Fl_Tree_Item newitem)

Sets the root item to 'newitem'.

If a root item already exists, clear() is called first to clear it before replacing it with newitem.Use this to install a custom item (derived from Fl_Tree_Item) as the root of the tree. This allows the derived class to implement custom drawing by overriding Fl_Tree_Item::draw_item_content().

Version
1.3.3
void Fl_Tree::root_label ( const char *  new_label)

Set the label for the root item to 'new_label'.

Makes an internally managed copy of 'new_label'.

int Fl_Tree::scrollbar_size ( ) const

Gets the default size of scrollbars' troughs for this widget in pixels.

If this value is zero (default), this widget will use the global Fl::scrollbar_size() value as the scrollbar's width.

Returns
Scrollbar size in pixels, or 0 if the global Fl::scrollbar_size() is being used.
See Also
Fl::scrollbar_size(int)
void Fl_Tree::scrollbar_size ( int  size)

Sets the pixel size of the scrollbars' troughs to 'size' for this widget, in pixels.

Normally you should not need this method, and should use the global Fl::scrollbar_size(int) instead to manage the size of ALL your widgets' scrollbars. This ensures your application has a consistent UI, and is the default behavior. Normally this is what you want.

Only use this method if you really need to override just THIS instance of the widget's scrollbar size. (This need should be rare.)

Setting size to the special value of 0 causes the widget to track the global Fl::scrollbar_size(), which is the default.

Parameters
[in]sizeSets the scrollbar size in pixels.
If 0 (default), scrollbar size tracks the global Fl::scrollbar_size()
See Also
Fl::scrollbar_size()
int Fl_Tree::select ( Fl_Tree_Item item,
int  docallback = 1 
)

Select the specified 'item'.

Use 'deselect()' to deselect it.

Invokes the callback depending on the value of optional parameter docallback.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item to be selected. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 - item's state was changed
  • 0 - item was already selected, no change was made
int Fl_Tree::select ( const char *  path,
int  docallback = 1 
)

Select the item specified by 'path'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

Items or submenus that themselves contain slashes ('/' or '\') should be escaped, e.g. select("Holidays/12\\/25\\/2010").

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]path– the tree item's pathname (e.g. "Flintstones/Fred")
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
  • 1 : OK: item's state was changed
  • 0 : OK: item was already selected, no change was made
  • -1 : ERROR: item was not found
int Fl_Tree::select_all ( Fl_Tree_Item item = 0,
int  docallback = 1 
)

Select 'item' and all its children.

If item is NULL, first() is used.
Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]itemThe item that will be selected (along with all its children). If NULL, first() is used.
[in]docallback– A flag that determines if the callback() is invoked or not:
Returns
Count of how many items were actually changed to the selected state.
int Fl_Tree::select_only ( Fl_Tree_Item selitem,
int  docallback = 1 
)

Select only the specified item, deselecting all others that might be selected.

If 'selitem' is 0, first() is used.
Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]selitemThe item to be selected. If NULL, first() is used.
[in]docallback– A flag that determines if the callback() is invoked or not:
  • 0 - the callback() is not invoked
  • 1 - the callback() is invoked for each item that changed state (default), callback_reason() will be either FL_TREE_REASON_SELECTED or FL_TREE_REASON_DESELECTED
Returns
The number of items whose selection states were changed, if any.
void Fl_Tree::select_toggle ( Fl_Tree_Item item,
int  docallback = 1 
)

Toggle the select state of the specified 'item'.

Invokes the callback depending on the value of optional parameter 'docallback'.
Handles calling redraw() if anything changed.

The callback can use callback_item() and callback_reason() respectively to determine the item changed and the reason the callback was called.

Parameters
[in]item– the item to be selected. Must not be NULL.
[in]docallback– A flag that determines if the callback() is invoked or not:
Fl_Boxtype Fl_Tree::selectbox ( ) const

Sets the style of box used to draw selected items.

This is an fltk Fl_Boxtype. The default is influenced by FLTK's current Fl::scheme()

void Fl_Tree::selectbox ( Fl_Boxtype  val)

Gets the style of box used to draw selected items.

This is an fltk Fl_Boxtype. The default is influenced by FLTK's current Fl::scheme()

Fl_Tree_Select Fl_Tree::selectmode ( ) const

Gets the tree's current selection mode.

See Fl_Tree_Select for possible values.

void Fl_Tree::selectmode ( Fl_Tree_Select  val)

Sets the tree's selection mode.

See Fl_Tree_Select for possible values.

void Fl_Tree::set_item_focus ( Fl_Tree_Item item)

Set the item that currently should have keyboard focus.

Handles calling redraw() to update the focus box (if it is visible).

Parameters
[in]itemThe item that should take focus. If NULL, none will have focus.
void Fl_Tree::show_item ( Fl_Tree_Item item,
int  yoff 
)

Adjust the vertical scrollbar so that 'item' is visible 'yoff' pixels from the top of the Fl_Tree widget's display.

For instance, yoff=0 will position the item at the top.

If yoff is larger than the vertical scrollbar's limit, the value will be clipped. So if yoff=100, but scrollbar's max is 50, then 50 will be used.

Parameters
[in]itemThe item to be shown. If NULL, first() is used.
[in]yoffThe pixel offset from the top for the displayed position.
See Also
show_item_top(), show_item_middle(), show_item_bottom()
void Fl_Tree::show_item ( Fl_Tree_Item item)

Adjust the vertical scrollbar to show 'item' at the top of the display IF it is currently off-screen (for instance show_item_top()).

If it is already on-screen, no change is made.

Parameters
[in]itemThe item to be shown. If NULL, first() is used.
See Also
show_item_top(), show_item_middle(), show_item_bottom()
void Fl_Tree::show_item_bottom ( Fl_Tree_Item item)

Adjust the vertical scrollbar so that 'item' is at the bottom of the display.

Parameters
[in]itemThe item to be shown. If NULL, first() is used.
void Fl_Tree::show_item_middle ( Fl_Tree_Item item)

Adjust the vertical scrollbar so that 'item' is in the middle of the display.

Parameters
[in]itemThe item to be shown. If NULL, first() is used.
void Fl_Tree::show_item_top ( Fl_Tree_Item item)

Adjust the vertical scrollbar so that 'item' is at the top of the display.

Parameters
[in]itemThe item to be shown. If NULL, first() is used.
void Fl_Tree::show_self ( )

Print the tree as 'ascii art' to stdout.

Used mainly for debugging.

Todo:
should be const
Version
1.3.0
int Fl_Tree::showcollapse ( ) const

Returns 1 if the collapse icon is enabled, 0 if not.

See Also
showcollapse(int)
void Fl_Tree::showcollapse ( int  val)

Set if we should show the collapse icon or not.

If collapse icons are disabled, the user will not be able to interactively collapse items in the tree, unless the application provides some other means via open() and close().

Parameters
[in]val1: shows collapse icons (default),
0: hides collapse icons.
void Fl_Tree::showroot ( int  val)

Set if the root item should be shown or not.

Parameters
[in]val1 – show the root item (default)
0 – hide the root item.
Fl_Tree_Sort Fl_Tree::sortorder ( ) const

Set the default sort order used when items are added to the tree.

See Fl_Tree_Sort for possible values.

Fl_Image * Fl_Tree::usericon ( ) const

Returns the Fl_Image being used as the default user icon for all newly created items.

Returns zero if no icon has been set, which is the default.

void Fl_Tree::usericon ( Fl_Image val)

Sets the Fl_Image to be used as the default user icon for all newly created items.

If you want to specify user icons on a per-item basis, use Fl_Tree_Item::usericon() instead.

Parameters
[in]val– The new image to be used, or zero to disable user icons.
int Fl_Tree::usericonmarginleft ( ) const

Get the amount of white space (in pixels) that should appear to the left of the usericon.

void Fl_Tree::usericonmarginleft ( int  val)

Set the amount of white space (in pixels) that should appear to the left of the usericon.

int Fl_Tree::vposition ( ) const

Returns the vertical scroll position as a pixel offset.

The position returned is how many pixels of the tree are scrolled off the top edge of the screen.

See Also
vposition(int), hposition(), hposition(int)
void Fl_Tree::vposition ( int  pos)

Sets the vertical scroll offset to position 'pos'.

The position is how many pixels of the tree are scrolled off the top edge of the screen.

Parameters
[in]posThe vertical position (in pixels) to scroll the tree to.
See Also
vposition(), hposition(), hposition(int)
int Fl_Tree::widgetmarginleft ( ) const

Get the amount of white space (in pixels) that should appear to the left of the child fltk widget (if any).

void Fl_Tree::widgetmarginleft ( int  val)

Set the amount of white space (in pixels) that should appear to the left of the child fltk widget (if any).


The documentation for this class was generated from the following files: