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comparison dia/icanvas.d @ 22:17c2df87b459

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Package refactoring.
author "David Bryant <bagnose@gmail.com>"
date Wed, 15 Jul 2009 23:31:29 +0930
parents icanvas.d@d6e7a5a6f008
children 06c30d250c0a
comparison
equal deleted inserted replaced
21:993ac3a183c8 22:17c2df87b459
1 module dia.icanvas;
2
3 import tk.geometry;
4 import tk.events;
5 import cairo.Context;
6
7 interface Viewport {
8 void zoom_relative(Point pixel_datum, double factor);
9 void pan_relative(Vector pixel_displacement);
10 void damage_model(Rectangle area); // FIXME could be an inout parameter of the event handling, or a special scope Damage object that supports growth only
11 void damage_pixel(Rectangle area); // FIXME as above
12
13 // FIXME not sure about these:
14 double zoom() const;
15 Point model_to_pixel(Point model) const;
16 Point pixel_to_model(Point pixel) const;
17 Vector model_to_pixel(Vector model) const;
18 Vector pixel_to_model(Vector pixel) const;
19 Rectangle model_to_pixel(Rectangle model) const;
20 Rectangle pixel_to_model(Rectangle model) const;
21 double model_to_pixel(double model) const;
22 double pixel_to_model(double pixel) const;
23 }
24
25 interface EventHandler {
26 bool handle_button_press(Viewport viewport, in ButtonEvent event);
27 bool handle_button_release(Viewport viewport, in ButtonEvent event);
28 bool handle_motion(Viewport viewport, in MotionEvent event);
29 bool handle_scroll(Viewport viewport, in ScrollEvent event);
30 //bool handle_enter(Viewport viewport, CrossingEvent event);
31 //bool handle_leave(Viewport viewport, CrossingEvent event);
32 //bool handle_focus_in(Viewport viewport, FocusEvent event);
33 //bool handle_focus_out(Viewport viewport, FocusEvent event);
34 bool handle_key_press(Viewport viewport, in KeyEvent event);
35 bool handle_key_release(Viewport viewport, in KeyEvent event);
36 }
37
38 abstract class Layer {
39 this(in string name) {
40 mName = name;
41 }
42
43 string name() const { return mName; }
44
45 Rectangle bounds() const;
46 //void zoom_changed
47 void draw(const Viewport viewport,
48 in Rectangle pixel_damage, scope Context pixel_cr,
49 in Rectangle model_damage, scope Context model_cr) const;
50
51 private {
52 invariant string mName;
53 }
54 }