Create class Fl_Widget_Surface that supports draw(Fl_Widget *, int, int).

This simplifies the implementation of Fl_Copy_Surface and Fl_Image_Surface
which now are made to derive from Fl_Widget_Surface.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11220 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 61 insertions, 0 deletions

diff --git a/FL/Fl_Widget_Surface.H b/FL/Fl_Widget_Surface.H
new file mode 100644
index 000000000..c123db560
--- /dev/null
+++ b/FL/Fl_Widget_Surface.H
@@ -0,0 +1,61 @@
+//
+// "$Id: Fl_Widget_Surface.H 11217 2016-02-25 17:56:48Z manolo $"
+//
+// Drivers code for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2016 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+#ifndef Fl_Widget_Surface_h
+#define Fl_Widget_Surface_h
+
+#include <FL/Fl_Device.H>
+#include <FL/Fl_Window.H>
+
+/** A surface on which any FLTK widget can be drawn.
+ */
+class FL_EXPORT Fl_Widget_Surface : public Fl_Surface_Device {
+private:
+  void traverse(Fl_Widget *widget); // finds subwindows of widget and prints them
+protected:
+  /** \brief horizontal offset to the origin of graphics coordinates */
+  int x_offset;
+  /** \brief vertical offset to the origin of graphics coordinates */
+  int y_offset;
+public:
+  Fl_Widget_Surface(Fl_Graphics_Driver *d);
+  /**
+   Translates the current graphics origin accounting for the current rotation.
+   
+   This function is only useful after a rotate() call.
+   Each translate() call must be matched by an untranslate() call.
+   Successive translate() calls add up their effects.
+   */
+  virtual void translate(int x, int y) {}
+  /**
+   Undoes the effect of a previous translate() call.
+   */
+  virtual void untranslate(void) {}
+  virtual void draw(Fl_Widget* widget, int delta_x = 0, int delta_y = 0);
+  virtual void draw_decorated_window(Fl_Window *win, int x_offset = 0, int y_offset = 0);
+  virtual void print_window_part(Fl_Window *win, int x, int y, int w, int h, int delta_x = 0, int delta_y = 0);
+  virtual int printable_rect(int *w, int *h);
+  virtual void origin(int x, int y);
+  virtual void origin(int *x, int *y);
+};
+
+#endif /* Fl_Widget_Surface_h */
+
+//
+// End of "$Id: Fl_Widget_Surface.H 11217 2016-02-25 17:56:48Z manolo $".
+//