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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
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17c2df87b459 Package refactoring.
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1 module dia.icanvas;
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3 import tk.geometry;
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4 import tk.events;
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5 import cairo.Context;
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6
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7 interface Viewport {
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8 void zoom_relative(Point pixel_datum, double factor);
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9 void pan_relative(Vector pixel_displacement);
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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
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11 void damage_pixel(Rectangle area); // FIXME as above
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13 // FIXME not sure about these:
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14 double zoom() const;
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15 Point model_to_pixel(Point model) const;
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16 Point pixel_to_model(Point pixel) const;
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17 Vector model_to_pixel(Vector model) const;
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18 Vector pixel_to_model(Vector pixel) const;
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19 Rectangle model_to_pixel(Rectangle model) const;
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20 Rectangle pixel_to_model(Rectangle model) const;
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21 double model_to_pixel(double model) const;
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22 double pixel_to_model(double pixel) const;
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23 }
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24
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25 interface EventHandler {
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26 bool handle_button_press(Viewport viewport, in ButtonEvent event);
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27 bool handle_button_release(Viewport viewport, in ButtonEvent event);
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28 bool handle_motion(Viewport viewport, in MotionEvent event);
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29 bool handle_scroll(Viewport viewport, in ScrollEvent event);
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30 //bool handle_enter(Viewport viewport, CrossingEvent event);
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31 //bool handle_leave(Viewport viewport, CrossingEvent event);
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32 //bool handle_focus_in(Viewport viewport, FocusEvent event);
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33 //bool handle_focus_out(Viewport viewport, FocusEvent event);
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34 bool handle_key_press(Viewport viewport, in KeyEvent event);
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35 bool handle_key_release(Viewport viewport, in KeyEvent event);
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36 }
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38 abstract class Layer {
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39 this(in string name) {
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40 mName = name;
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41 }
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43 string name() const { return mName; }
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44
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45 Rectangle bounds() const;
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46 //void zoom_changed
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47 void draw(const Viewport viewport,
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48 in Rectangle pixel_damage, scope Context pixel_cr,
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49 in Rectangle model_damage, scope Context model_cr) const;
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51 private {
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52 invariant string mName;
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53 }
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54 }