Fl_Copy_Surface Class Reference

Supports copying of graphical data to the clipboard. More...

#include <Fl_Copy_Surface.H>

Inheritance diagram for Fl_Copy_Surface:

Public Member Functions
const char *	class_name ()
	Returns the name of the class of this object.
void	draw (Fl_Widget *widget, int delta_x=0, int delta_y=0)
	Copies a widget in the clipboard.
void	draw_decorated_window (Fl_Window *win, int delta_x=0, int delta_y=0)
	Copies a window and its borders and title bar to the clipboard.
	Fl_Copy_Surface (int w, int h)
	Constructor.
int	h ()
	Returns the pixel height of the copy surface.
void	set_current ()
	Make this surface the current drawing surface.
int	w ()
	Returns the pixel width of the copy surface.
	~Fl_Copy_Surface ()
	Destructor.
Public Member Functions inherited from Fl_Surface_Device
const char *	class_name ()
	Returns the name of the class of this object.
Fl_Graphics_Driver *	driver ()
	Returns the graphics driver of this drawing surface.
void	driver (Fl_Graphics_Driver *graphics_driver)
	Sets the graphics driver of this drawing surface.
virtual	~Fl_Surface_Device ()
	The destructor.
Public Member Functions inherited from Fl_Device
virtual	~Fl_Device ()
	Virtual destructor.

Static Public Attributes
static const char *	class_id = "Fl_Copy_Surface"
Static Public Attributes inherited from Fl_Surface_Device
static const char *	class_id = "Fl_Surface_Device"
Static Public Attributes inherited from Fl_Device
static const char *	class_id = "Fl_Device"
	A string that identifies each subclass of Fl_Device.

Additional Inherited Members
Static Public Member Functions inherited from Fl_Surface_Device
static Fl_Surface_Device *	surface ()
	The current drawing surface.
Protected Member Functions inherited from Fl_Surface_Device
	Fl_Surface_Device (Fl_Graphics_Driver *graphics_driver)
	Constructor that sets the graphics driver to use for the created surface.

Detailed Description

Supports copying of graphical data to the clipboard.

After creation of an Fl_Copy_Surface object, call set_current() on it, and all subsequent graphics requests will be recorded in the clipboard. It's possible to draw widgets (using Fl_Copy_Surface::draw() ) or to use any of the Drawing functions or the Color & Font functions. Finally, delete the Fl_Copy_Surface object to load the clipboard with the graphical data.
Fl_GL_Window 's can be copied to the clipboard as well.
Usage example:

Fl_Widget *g = ...; // a widget you want to copy to the clipboard
Fl_Copy_Surface *copy_surf = new Fl_Copy_Surface(g->w(), g->h()); // create an Fl_Copy_Surface object
copy_surf->set_current(); // direct graphics requests to the clipboard
fl_color(FL_WHITE); fl_rectf(0, 0, g->w(), g->h()); // draw a white background
copy_surf->draw(g); // draw the g widget in the clipboard
delete copy_surf; // after this, the clipboard is loaded
Fl_Display_Device::display_device()->set_current();  // direct graphics requests back to the display

Platform details:

• MSWindows: Transparent RGB images copy without transparency. The graphical data are copied to the clipboard as an 'enhanced metafile'.
• Mac OS: The graphical data are copied to the clipboard (a.k.a. pasteboard) in two 'flavors': 1) in vectorial form as PDF data; 2) in bitmap form as a TIFF image. Applications to which the clipboard content is pasted can use the flavor that suits them best.
• X11: the graphical data are copied to the clipboard as an image in BMP format.

Constructor & Destructor Documentation

Fl_Copy_Surface()

Fl_Copy_Surface::Fl_Copy_Surface	(	int	w,
		int	h
	)

Constructor.

Parameters

w	and
h	are the width and height of the clipboard surface in pixels where drawing will occur.

Member Function Documentation

class_name()

const char * Fl_Copy_Surface::class_name ( )

inlinevirtual

Returns the name of the class of this object.

Use of the class_name() function is discouraged because it will be removed from future FLTK versions.

The class of an instance of an Fl_Device subclass can be checked with code such as:

if ( instance->class_name() == Fl_Printer::class_id ) { ... }

Reimplemented from Fl_Device.

draw()

void Fl_Copy_Surface::draw	(	Fl_Widget *	widget,
		int	delta_x = 0,
		int	delta_y = 0
	)

Copies a widget in the clipboard.

Parameters

widget	any FLTK widget (e.g., standard, custom, window, GL view) to copy
delta_x	and
delta_y	give the position in the clipboard of the top-left corner of the widget

draw_decorated_window()

void Fl_Copy_Surface::draw_decorated_window	(	Fl_Window *	win,
		int	delta_x = 0,
		int	delta_y = 0
	)

Copies a window and its borders and title bar to the clipboard.

Parameters

win	an FLTK window to copy
delta_x	and
delta_y	give the position in the clipboard of the top-left corner of the window's title bar

set_current()

void Fl_Copy_Surface::set_current ( void  )

virtual

Make this surface the current drawing surface.

This surface will receive all future graphics requests.

Reimplemented from Fl_Surface_Device.

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

• Fl_Copy_Surface.H
• Fl_Copy_Surface.cxx