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view icanvas.d @ 10:71ca82e0eb76
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author | "David Bryant <bagnose@gmail.com>" |
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date | Sat, 11 Jul 2009 22:49:41 +0930 |
parents | 936feb16eed4 |
children | fb571a3b1f0d |
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module icanvas; import tk.geometry; import tk.events; import cairo.Context; interface Viewport { void rel_zoom(Point screen_datum, double factor); void rel_pan(Vector screen_displacement); //void damage(Rectangle area); Point model_to_screen(Point model) const; Point screen_to_model(Point screen) const; Vector model_to_screen(Vector model) const; Vector screen_to_model(Vector screen) const; double model_to_screen(double model) const; double screen_to_model(double screen) const; } interface EventHandler { bool handle_button_press(Viewport viewport, in ButtonEvent event); bool handle_button_release(Viewport viewport, in ButtonEvent event); bool handle_motion(Viewport viewport, in MotionEvent event); bool handle_scroll(Viewport viewport, in ScrollEvent event); //bool handle_expose(Viewport viewport, ExposeEvent event); //bool handle_enter(Viewport viewport, CrossingEvent event); //bool handle_leave(Viewport viewport, CrossingEvent event); //bool handle_focus_in(Viewport viewport, FocusEvent event); //bool handle_focus_out(Viewport viewport, FocusEvent event); bool handle_key_press(Viewport viewport, in KeyEvent event); bool handle_key_release(Viewport viewport, in KeyEvent event); } abstract class Layer { void draw(const Viewport viewport, in Rectangle damage, Context cr) const; }