FLTK 1.4.0
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Fl_Spinner Class Reference

This widget is a combination of a numerical input widget and repeat buttons. More...

#include <Fl_Spinner.H>

Inheritance diagram for Fl_Spinner:
Fl_Group Fl_Widget

Classes

class  Fl_Spinner_Input
 

Public Member Functions

Fl_Color color () const
 Returns the background color of the spinner widget's input field.
 
void color (Fl_Color v)
 Sets the background color of the spinner widget's input field.
 
 Fl_Spinner (int X, int Y, int W, int H, const char *L=0)
 Creates a new Fl_Spinner widget using the given position, size, and label string.
 
const char * format () const
 Returns the format string for the value.
 
void format (const char *f)
 Sets the format string for the value.
 
int handle (int event) FL_OVERRIDE
 Handles the specified event.
 
double maximum () const
 Gets the maximum value of the widget.
 
void maximum (double m)
 Sets the maximum value of the widget.
 
int maximum_size () const
 Returns the maximum width of the input field.
 
void maximum_size (int m)
 Sets the maximum width of the input field.
 
double minimum () const
 Gets the minimum value of the widget.
 
void minimum (double m)
 Sets the minimum value of the widget.
 
void range (double a, double b)
 Sets the minimum and maximum values for the widget.
 
void resize (int X, int Y, int W, int H) FL_OVERRIDE
 Resizes the Fl_Group widget and all of its children.
 
Fl_Color selection_color () const
 Returns the selection color of the spinner widget's input field.
 
void selection_color (Fl_Color val)
 Sets the selection color of the spinner widget's input field.
 
double step () const
 Gets the amount to change the value when the user clicks a button.
 
void step (double s)
 Sets or returns the amount to change the value when the user clicks a button.
 
Fl_Color textcolor () const
 Gets the color of the text in the input field.
 
void textcolor (Fl_Color c)
 Sets the color of the text in the input field.
 
Fl_Font textfont () const
 Gets the font of the text in the input field.
 
void textfont (Fl_Font f)
 Sets the font of the text in the input field.
 
Fl_Fontsize textsize () const
 Gets the size of the text in the input field.
 
void textsize (Fl_Fontsize s)
 Sets the size of the text in the input field.
 
uchar type () const
 Gets the numeric representation in the input field.
 
void type (uchar v)
 Sets the numeric representation in the input field.
 
double value () const
 Gets the current value of the widget.
 
void value (double v)
 Sets the current value of the input widget.
 
int wrap () const
 Gets the wrap mode of the Fl_Spinner widget.
 
void wrap (int set)
 Sets whether the spinner wraps around at upper and lower bounds.
 
- 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.
 
Fl_Group const * as_group () const FL_OVERRIDE
 
Fl_Groupas_group () FL_OVERRIDE
 Returns an Fl_Group pointer if this widget is an Fl_Group.
 
void begin ()
 Sets the current group so you can build the widget tree by just constructing the widgets.
 
Fl_Widgetchild (int n) const
 Returns array()[n].
 
int children () const
 Returns how many child widgets the group has.
 
void clear ()
 Deletes all child widgets from memory recursively.
 
unsigned int clip_children ()
 Returns the current clipping mode.
 
void clip_children (int c)
 Controls whether the group widget clips the drawing of child widgets to its bounding box.
 
virtual int delete_child (int n)
 Removes the widget at index from the group and deletes it.
 
void end ()
 Exactly the same as current(this->parent()).
 
int find (const Fl_Widget &o) const
 See int Fl_Group::find(const Fl_Widget *w) const.
 
int find (const Fl_Widget *) const
 Searches the child array for the widget and returns the index.
 
 Fl_Group (int, int, int, int, const char *=0)
 Creates a new Fl_Group widget using the given position, size, and label string.
 
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.
 
void insert (Fl_Widget &, int i)
 The widget is removed from its current group (if any) and then inserted into this group.
 
void insert (Fl_Widget &o, Fl_Widget *before)
 This does insert(w, find(before)).
 
void remove (Fl_Widget &)
 Removes a widget from the group but does not delete it.
 
void remove (Fl_Widget *o)
 Removes the widget o from the group.
 
void remove (int index)
 Removes the widget at index from the group but does not delete it.
 
Fl_Widgetresizable () const
 Returns the group's resizable widget.
 
void resizable (Fl_Widget &o)
 Sets the group's resizable widget.
 
void resizable (Fl_Widget *o)
 The resizable widget defines both the resizing box and the resizing behavior of the group and its children.
 
virtual ~Fl_Group ()
 The destructor also deletes all the children.
 
- Public Member Functions inherited from Fl_Widget
void _clear_fullscreen ()
 
void _set_fullscreen ()
 
void activate ()
 Activates the widget.
 
unsigned int active () const
 Returns whether the widget is active.
 
int active_r () const
 Returns whether the widget and all of its parents are active.
 
Fl_Align align () const
 Gets the label alignment.
 
void align (Fl_Align alignment)
 Sets the label alignment.
 
long argument () const
 Gets the current user data (long) argument that is passed to the callback function.
 
void argument (long v)
 Sets the current user data (long) argument that is passed to the callback function.
 
virtual class Fl_Gl_Windowas_gl_window ()
 Returns an Fl_Gl_Window pointer if this widget is an Fl_Gl_Window.
 
virtual class Fl_Gl_Window const * as_gl_window () const
 
virtual Fl_Windowas_window ()
 Returns an Fl_Window pointer if this widget is an Fl_Window.
 
virtual Fl_Window const * as_window () const
 
void bind_deimage (Fl_Image *img)
 Sets the image to use as part of the widget label when in the inactive state.
 
void bind_deimage (int f)
 Bind the inactive image to the widget, so the widget will delete the image when it is no longer needed.
 
void bind_image (Fl_Image *img)
 Sets the image to use as part of the widget label when in the active state.
 
void bind_image (int f)
 Bind the image to the widget, so the widget will delete the image when it is no longer needed.
 
Fl_Boxtype box () const
 Gets the box type of the widget.
 
void box (Fl_Boxtype new_box)
 Sets the box type for the widget.
 
Fl_Callback_p callback () const
 Gets the current callback function for the widget.
 
void callback (Fl_Callback *cb)
 Sets the current callback function for the widget.
 
void callback (Fl_Callback *cb, Fl_Callback_User_Data *p, bool auto_free)
 Sets the current callback function and managed user data for the widget.
 
void callback (Fl_Callback *cb, void *p)
 Sets the current callback function and data for the widget.
 
void callback (Fl_Callback0 *cb)
 Sets the current callback function for the widget.
 
void callback (Fl_Callback1 *cb, long p=0)
 Sets the current callback function for the widget.
 
unsigned int changed () const
 Checks if the widget value changed since the last callback.
 
void clear_active ()
 Marks the widget as inactive without sending events or changing focus.
 
void clear_changed ()
 Marks the value of the widget as unchanged.
 
void clear_damage (uchar c=0)
 Clears or sets the damage flags.
 
void clear_output ()
 Sets a widget to accept input.
 
void clear_visible ()
 Hides the widget.
 
void clear_visible_focus ()
 Disables keyboard focus navigation with this widget.
 
Fl_Color color () const
 Gets the background color of the widget.
 
void color (Fl_Color bg)
 Sets the background color of the widget.
 
void color (Fl_Color bg, Fl_Color sel)
 Sets the background and selection color of the widget.
 
Fl_Color color2 () const
 For back compatibility only.
 
void color2 (unsigned a)
 For back compatibility only.
 
int contains (const Fl_Widget *w) const
 Checks if w is a child of this widget.
 
void copy_label (const char *new_label)
 Sets the current label.
 
void copy_tooltip (const char *text)
 Sets the current tooltip text.
 
uchar damage () const
 Returns non-zero if draw() needs to be called.
 
void damage (uchar c)
 Sets the damage bits for the widget.
 
void damage (uchar c, int x, int y, int w, int h)
 Sets the damage bits for an area inside the widget.
 
int damage_resize (int, int, int, int)
 Internal use only.
 
void deactivate ()
 Deactivates the widget.
 
Fl_Imagedeimage ()
 Gets the image that is used as part of the widget label when in the inactive state.
 
const Fl_Imagedeimage () const
 Gets the image that is used as part of the widget label when in the inactive state.
 
void deimage (Fl_Image &img)
 Sets the image to use as part of the widget label when in the inactive state.
 
void deimage (Fl_Image *img)
 Sets the image to use as part of the widget label when in the inactive state.
 
int deimage_bound () const
 Returns whether the inactive image is managed by the widget.
 
void do_callback (Fl_Callback_Reason reason=FL_REASON_UNKNOWN)
 Calls the widget callback function with default arguments.
 
void do_callback (Fl_Widget *widget, long arg, Fl_Callback_Reason reason=FL_REASON_UNKNOWN)
 Calls the widget callback function with arbitrary arguments.
 
void do_callback (Fl_Widget *widget, void *arg=0, Fl_Callback_Reason reason=FL_REASON_UNKNOWN)
 Calls the widget callback function with arbitrary arguments.
 
void draw_label (int, int, int, int, Fl_Align) const
 Draws the label in an arbitrary bounding box with an arbitrary alignment.
 
int h () const
 Gets the widget height.
 
virtual void hide ()
 Makes a widget invisible.
 
Fl_Imageimage ()
 Gets the image that is used as part of the widget label when in the active state.
 
const Fl_Imageimage () const
 Gets the image that is used as part of the widget label when in the active state.
 
void image (Fl_Image &img)
 Sets the image to use as part of the widget label when in the active state.
 
void image (Fl_Image *img)
 Sets the image to use as part of the widget label when in the active state.
 
int image_bound () const
 Returns whether the image is managed by the widget.
 
int inside (const Fl_Widget *wgt) const
 Checks if this widget is a child of wgt.
 
int is_label_copied () const
 Returns whether the current label was assigned with copy_label().
 
const char * label () const
 Gets the current label text.
 
void label (const char *text)
 Sets the current label pointer.
 
void label (Fl_Labeltype a, const char *b)
 Shortcut to set the label text and type in one call.
 
Fl_Color labelcolor () const
 Gets the label color.
 
void labelcolor (Fl_Color c)
 Sets the label color.
 
Fl_Font labelfont () const
 Gets the font to use.
 
void labelfont (Fl_Font f)
 Sets the font to use.
 
Fl_Fontsize labelsize () const
 Gets the font size in pixels.
 
void labelsize (Fl_Fontsize pix)
 Sets the font size in pixels.
 
Fl_Labeltype labeltype () const
 Gets the label type.
 
void labeltype (Fl_Labeltype a)
 Sets the label type.
 
void measure_label (int &ww, int &hh) const
 Sets width ww and height hh accordingly with the label size.
 
bool needs_keyboard () const
 Returns whether this widget needs a keyboard.
 
void needs_keyboard (bool needs)
 Sets whether this widget needs a keyboard.
 
unsigned int output () const
 Returns if a widget is used for output only.
 
Fl_Groupparent () const
 Returns a pointer to the parent widget.
 
void parent (Fl_Group *p)
 Internal use only - "for hacks only".
 
void position (int X, int Y)
 Repositions the window or widget.
 
void redraw ()
 Schedules the drawing of the widget.
 
void redraw_label ()
 Schedules the drawing of the label.
 
Fl_Color selection_color () const
 Gets the selection color.
 
void selection_color (Fl_Color a)
 Sets the selection color.
 
void set_active ()
 Marks the widget as active without sending events or changing focus.
 
void set_changed ()
 Marks the value of the widget as changed.
 
void set_output ()
 Sets a widget to output only.
 
void set_visible ()
 Makes the widget visible.
 
void set_visible_focus ()
 Enables keyboard focus navigation with this widget.
 
int shortcut_label () const
 Returns whether the widget's label uses '&' to indicate shortcuts.
 
void shortcut_label (int value)
 Sets whether the widget's label uses '&' to indicate shortcuts.
 
virtual void show ()
 Makes a widget visible.
 
void size (int W, int H)
 Changes the size of the widget.
 
int take_focus ()
 Gives the widget the keyboard focus.
 
unsigned int takesevents () const
 Returns if the widget is able to take events.
 
int test_shortcut ()
 Returns true if the widget's label contains the entered '&x' shortcut.
 
const char * tooltip () const
 Gets the current tooltip text.
 
void tooltip (const char *text)
 Sets the current tooltip text.
 
Fl_Windowtop_window () const
 Returns a pointer to the top-level window for the widget.
 
Fl_Windowtop_window_offset (int &xoff, int &yoff) const
 Finds the x/y offset of the current widget relative to the top-level window.
 
uchar type () const
 Gets the widget type.
 
void type (uchar t)
 Sets the widget type.
 
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.
 
void user_data (Fl_Callback_User_Data *v, bool auto_free)
 Sets the user data for this widget.
 
void user_data (void *v)
 Sets the user data for this widget.
 
unsigned int visible () const
 Returns whether a widget is visible.
 
unsigned int visible_focus () const
 Checks whether this widget has a visible focus.
 
void visible_focus (int v)
 Modifies keyboard focus navigation.
 
int visible_r () const
 Returns whether a widget and all its parents are visible.
 
int w () const
 Gets the widget width.
 
Fl_When when () const
 Returns the conditions under which the callback is called.
 
void when (uchar i)
 Sets the flags used to decide when a callback is called.
 
Fl_Windowwindow () const
 Returns a pointer to the nearest parent window up the widget hierarchy.
 
int x () const
 Gets the widget position in its window.
 
int y () const
 Gets the widget position in its window.
 
virtual ~Fl_Widget ()
 Destroys the widget.
 

Protected Member Functions

void draw () FL_OVERRIDE
 Draws the widget.
 
- Protected Member Functions inherited from Fl_Group
Fl_Rectbounds ()
 Returns the internal array of widget sizes and positions.
 
void draw_child (Fl_Widget &widget) const
 Forces a child to redraw.
 
void draw_children ()
 Draws all children of the group.
 
void draw_outside_label (const Fl_Widget &widget) const
 Parents normally call this to draw outside labels of child widgets.
 
virtual int on_insert (Fl_Widget *, int)
 Allow derived groups to act when a widget is added as a child.
 
virtual int on_move (int, int)
 Allow derived groups to act when a widget is moved within the group.
 
virtual void on_remove (int)
 Allow derived groups to act when a child widget is removed from the group.
 
int * sizes ()
 Returns the internal array of widget sizes and positions.
 
void update_child (Fl_Widget &widget) const
 Draws a child only if it needs it.
 
- 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.
 
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.
 
void draw_focus () const
 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 rectangle around the widget.
 
void draw_focus (Fl_Boxtype t, int x, int y, int w, int h, Fl_Color bg) 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.
 
void draw_label (int, int, int, int) const
 Draws the label in an arbitrary bounding box.
 
 Fl_Widget (int x, int y, int w, int h, const char *label=0L)
 Creates a widget at the given position and size.
 
unsigned int flags () const
 Gets the widget flags mask.
 
void h (int v)
 Internal use only.
 
void set_flag (unsigned int c)
 Sets a flag in the flags mask.
 
void w (int v)
 Internal use only.
 
void x (int v)
 Internal use only.
 
void y (int v)
 Internal use only.
 

Protected Attributes

Fl_Repeat_Button down_button_
 
Fl_Spinner_Input input_
 
Fl_Repeat_Button up_button_
 

Additional Inherited Members

- Static Public Member Functions inherited from Fl_Group
static Fl_Groupcurrent ()
 Returns the currently active group.
 
static void current (Fl_Group *g)
 Sets the current group.
 
- Static Public Member Functions inherited from Fl_Widget
static void default_callback (Fl_Widget *widget, void *data)
 The default callback for all widgets that don't set a callback.
 
static unsigned int label_shortcut (const char *t)
 Returns the Unicode value of the '&x' shortcut in a given text.
 
static int test_shortcut (const char *, const bool require_alt=false)
 Returns true if the given text t contains the entered '&x' shortcut.
 
- 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 ,
  NEEDS_KEYBOARD = 1<<20 , IMAGE_BOUND = 1<<21 , DEIMAGE_BOUND = 1<<22 , AUTO_DELETE_USER_DATA = 1<<23 ,
  MAXIMIZED = 1<<24 , POPUP = 1<<25 , USERFLAG3 = 1<<29 , USERFLAG2 = 1<<30 ,
  USERFLAG1 = 1<<31
}
 flags possible values enumeration. More...
 

Detailed Description

This widget is a combination of a numerical input widget and repeat buttons.

The user can either type into the input area or use the buttons to change the value.

Fl_Spinner widget

Constructor & Destructor Documentation

◆ Fl_Spinner()

Fl_Spinner::Fl_Spinner ( int  X,
int  Y,
int  W,
int  H,
const char *  L = 0 
)

Creates a new Fl_Spinner widget using the given position, size, and label string.

The inherited destructor destroys the widget and any value associated with it.

Member Function Documentation

◆ draw()

void Fl_Spinner::draw ( )
protectedvirtual

Draws the widget.

Never call this function directly. FLTK will schedule redrawing whenever needed. If your widget must be redrawn as soon as possible, call redraw() instead.

Override this function to draw your own widgets.

If you ever need to call another widget's draw method from within your own draw() method, e.g. for an embedded scrollbar, you can do it (because draw() is virtual) like this:

Fl_Widget *s = &scrollbar; // scrollbar is an embedded Fl_Scrollbar
s->draw(); // calls Fl_Scrollbar::draw()
Fl_Widget is the base class for all widgets in FLTK.
Definition Fl_Widget.H:104

Reimplemented from Fl_Group.

◆ handle()

int Fl_Spinner::handle ( int  event)
virtual

Handles the specified event.

You normally don't call this method directly, but instead let FLTK do it when the user interacts with the widget.

When implemented in a widget, this function must return 0 if the widget does not use the event or 1 otherwise.

Most of the time, you want to call the inherited handle() method in your overridden method so that you don't short-circuit events that you don't handle. In this last case you should return the callee retval.

One exception to the rule in the previous paragraph is if you really want to override the behavior of the base class. This requires knowledge of the details of the inherited class.

In rare cases you may want to return 1 from your handle() method although you don't really handle the event. The effect would be to filter event processing, for instance if you want to dismiss non-numeric characters (keypresses) in a numeric input widget. You may "ring the bell" or show another visual indication or drop the event silently. In such a case you must not call the handle() method of the base class and tell FLTK that you consumed the event by returning 1 even if you didn't do anything with it.

Parameters
[in]eventthe kind of event received
Return values
0if the event was not used or understood
1if the event was used and can be deleted
See also
Fl_Event

Reimplemented from Fl_Group.

◆ resize()

void Fl_Spinner::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.

◆ step() [1/2]

double Fl_Spinner::step ( ) const
inline

Gets the amount to change the value when the user clicks a button.

See also
Fl_Spinner::step(double)

◆ step() [2/2]

void Fl_Spinner::step ( double  s)

Sets or returns the amount to change the value when the user clicks a button.

Before setting step to a non-integer value, the spinner type() should be changed to floating point.

See also
double Fl_Spinner::step() const

◆ type() [1/2]

uchar Fl_Spinner::type ( ) const
inline

Gets the numeric representation in the input field.

See also
Fl_Spinner::type(uchar)

◆ type() [2/2]

void Fl_Spinner::type ( uchar  v)

Sets the numeric representation in the input field.

Valid values are FL_INT_INPUT and FL_FLOAT_INPUT. Also changes the format() template. Setting a new spinner type via a superclass pointer will not work.

Note
type() is not a virtual function.

◆ value()

void Fl_Spinner::value ( double  v)
inline

Sets the current value of the input widget.

Before setting value to a non-integer value, the spinner type() should be changed to floating point.

◆ wrap() [1/2]

int Fl_Spinner::wrap ( ) const
inline

Gets the wrap mode of the Fl_Spinner widget.

See also
void wrap(int)
Since
1.4.0

◆ wrap() [2/2]

void Fl_Spinner::wrap ( int  set)
inline

Sets whether the spinner wraps around at upper and lower bounds.

If wrap mode is on the spinner value is set to the minimum() or maximum() if the value exceeds the upper or lower bounds, resp., if it was changed by one of the buttons or the FL_Up or FL_Down keys.

The spinner stops at the upper and lower bounds if wrap mode is off.

The default wrap mode is on for backwards compatibility with FLTK 1.3.x and older versions.

Note
Wrap mode does not apply to the input field if the input value is edited directly as a number. The input value is always clipped to the allowed range as if wrap mode was off when the input field is left (i.e. loses focus).
See also
minimum(), maximum()
Parameters
[in]setnon-zero sets wrap mode, zero resets wrap mode
Since
1.4.0

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