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//
// "$Id: Fl_Copy_Surface.H 10928 2015-11-24 14:26:52Z manolo $"
//
// Copy-to-clipboard code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2014 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#ifndef Fl_Copy_Surface_H
#define Fl_Copy_Surface_H
#include <FL/Fl_Paged_Device.H>
#include <FL/Fl_Printer.H>
#include <FL/x.H>
/** Supports copying of graphical data to the clipboard.
<br> 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 \ref fl_drawings or the \ref fl_attributes.
Finally, delete the Fl_Copy_Surface object to load the clipboard with the graphical data.
<br> Fl_GL_Window 's can be copied to the clipboard as well.
<br> Usage example:
\code
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
\endcode
Platform details:
\li MSWindows: Transparent RGB images copy without transparency.
The graphical data are copied to the clipboard as an 'enhanced metafile'.
\li 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.
\li X11: the graphical data are copied to the clipboard as an image in BMP format.
*/
class FL_EXPORT Fl_Copy_Surface : public Fl_Surface_Device {
private:
int width;
int height;
Fl_Paged_Device *helper;
#ifdef __APPLE__
CFMutableDataRef pdfdata;
CGContextRef oldgc;
CGContextRef gc;
void prepare_copy_pdf_and_tiff(int w, int h);
void complete_copy_pdf_and_tiff();
void init_PDF_context(int w, int h);
static size_t MyPutBytes(void* info, const void* buffer, size_t count);
#elif defined(WIN32)
HDC oldgc;
HDC gc;
#else // Xlib
Fl_Offscreen xid;
Window oldwindow;
Fl_Surface_Device *_ss;
#endif
public:
static const char *class_id;
const char *class_name() {return class_id;};
Fl_Copy_Surface(int w, int h);
~Fl_Copy_Surface();
void set_current();
void draw(Fl_Widget* widget, int delta_x = 0, int delta_y = 0);
void draw_decorated_window(Fl_Window* win, int delta_x = 0, int delta_y = 0);
/** Returns the pixel width of the copy surface */
int w() { return width; }
/** Returns the pixel height of the copy surface */
int h() { return height; }
};
#if defined(__APPLE__)
/* Mac class to reimplement Fl_Paged_Device::printable_rect() */
class FL_EXPORT Fl_Quartz_Surface_ : public Fl_System_Printer {
protected:
int width;
int height;
public:
static const char *class_id;
const char *class_name() {return class_id;};
Fl_Quartz_Surface_(int w, int h);
virtual int printable_rect(int *w, int *h);
virtual ~Fl_Quartz_Surface_() {};
};
#elif defined(WIN32)
/* Win class to implement translate()/untranslate() */
class FL_EXPORT Fl_GDI_Surface_ : public Fl_Paged_Device {
int width;
int height;
unsigned depth;
POINT origins[10];
public:
static const char *class_id;
const char *class_name() {return class_id;};
Fl_GDI_Surface_();
virtual void translate(int x, int y);
virtual void untranslate();
virtual ~Fl_GDI_Surface_();
};
#elif !defined(FL_DOXYGEN)
/* Xlib class to implement translate()/untranslate() */
class FL_EXPORT Fl_Xlib_Surface_ : public Fl_Paged_Device {
public:
static const char *class_id;
const char *class_name() {return class_id;};
Fl_Xlib_Surface_();
virtual void translate(int x, int y);
virtual void untranslate();
virtual ~Fl_Xlib_Surface_();
};
#endif
#endif // Fl_Copy_Surface_H
//
// End of "$Id: Fl_Copy_Surface.H 10928 2015-11-24 14:26:52Z manolo $".
//
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