113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
//
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// "$Id$"
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//
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// Copy-to-clipboard code for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2014 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#ifndef Fl_Copy_Surface_H
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#define Fl_Copy_Surface_H
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#include <FL/Fl_Widget_Surface.H>
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/** Supports copying of graphical data to the clipboard.
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<br> After creation of an Fl_Copy_Surface object, make it the current drawing surface calling Fl_Surface_Device::push_current(), and all subsequent graphics requests
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will be recorded in the clipboard. It's possible to draw widgets (using Fl_Copy_Surface::draw()
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) or to use any of the \ref fl_drawings or the \ref fl_attributes.
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Finally, delete the Fl_Copy_Surface object to load the clipboard with the graphical data.
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<br> Fl_Gl_Window 's can be copied to the clipboard as well.
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<br> Usage example:
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\code
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Fl_Widget *g = ...; // a widget you want to copy to the clipboard
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Fl_Copy_Surface *copy_surf = new Fl_Copy_Surface(g->w(), g->h()); // create an Fl_Copy_Surface object
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Fl_Surface_Device::push_current(copy_surf); // direct graphics requests to the clipboard
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fl_color(FL_WHITE); fl_rectf(0, 0, g->w(), g->h()); // draw a white background
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copy_surf->draw(g); // draw the g widget in the clipboard
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Fl_Surface_Device::pop_current(); // direct graphics requests back to their previous destination
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delete copy_surf; // after this, the clipboard is loaded
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\endcode
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Platform details:
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\li Windows: Transparent RGB images copy without transparency.
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The graphical data are copied to the clipboard as an 'enhanced metafile'.
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\li Mac OS: The graphical data are copied to the clipboard (a.k.a. pasteboard) in two 'flavors':
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1) in vectorial form as PDF data; 2) in bitmap form as a TIFF image.
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Applications to which the clipboard content is pasted can use the flavor that suits them best.
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\li X11: the graphical data are copied to the clipboard as an image in BMP format.
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*/
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class FL_EXPORT Fl_Copy_Surface : public Fl_Widget_Surface {
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private:
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class Fl_Copy_Surface_Driver *platform_surface;
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protected:
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void translate(int x, int y);
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void untranslate();
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public:
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Fl_Copy_Surface(int w, int h);
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~Fl_Copy_Surface();
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void set_current();
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virtual bool is_current();
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/** Returns the pixel width of the copy surface */
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int w();
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/** Returns the pixel height of the copy surface */
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int h();
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void origin(int *x, int *y);
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void origin(int x, int y);
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int printable_rect(int *w, int *h);
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virtual void draw_decorated_window(Fl_Window *win, int x_offset, int y_offset);
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};
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/**
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\cond DriverDev
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\addtogroup DriverDeveloper
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\{
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*/
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/**
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A base class describing the interface between FLTK and draw-to-clipboard operations.
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This class is only for internal use by the FLTK library.
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A supported platform should implement the virtual methods of this class
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in order to support drawing to the clipboard through class Fl_Copy_Surface.
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*/
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class Fl_Copy_Surface_Driver : public Fl_Widget_Surface {
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friend class Fl_Copy_Surface;
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protected:
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int width;
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int height;
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Fl_Copy_Surface_Driver(int w, int h) : Fl_Widget_Surface(NULL), width(w), height(h) {}
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virtual ~Fl_Copy_Surface_Driver() {}
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virtual void set_current() = 0;
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virtual void translate(int x, int y) = 0;
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virtual void untranslate() = 0;
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int printable_rect(int *w, int *h);
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/** Each platform implements this function its own way.
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It returns an object implementing all virtual functions
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of class Fl_Copy_Surface_Driver for the plaform.
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*/
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static Fl_Copy_Surface_Driver *newCopySurfaceDriver(int w, int h);
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};
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/**
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\}
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\endcond
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*/
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#endif // Fl_Copy_Surface_H
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//
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// End of "$Id$".
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//
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