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annotate doodle/dia/icanvas.d @ 74:c03ed75c0f8e

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Icky
author "David Bryant <bagnose@gmail.com>"
date Sun, 15 Aug 2010 01:11:58 +0930
parents 31d10176415d
children 15ca7d5cd1ed
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1 module doodle.dia.icanvas;
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3 public {
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4 import doodle.tk.geometry;
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5 import doodle.tk.events;
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6 import cairo.Context;
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7 }
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9 private {
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10 import std.typecons;
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11 }
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13 mixin(defineEnum!("Cursor",
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14 "DEFAULT", "HAND", "CROSSHAIR", "PENCIL"));
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16 interface IViewport {
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17 void zoomRelative(in Point pixelDatum, in double factor);
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18 void panRelative(in Vector pixelDisplacement);
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19 void setCursor(in Cursor cursor);
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21 // FIXME get rid of these and accumulate damage during event handling
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22 void damageModel(in 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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23 void damagePixel(in Rectangle area); // FIXME as above
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24 }
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26 final class Damage {
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27 void increase(in Rectangle additional) { _rectangle = _rectangle | additional; }
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28 Rectangle rectangle() const { return _rectangle; }
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29 private Rectangle _rectangle;
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30 }
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32 interface IEventHandler {
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33 bool handleButtonPress(scope IViewport viewport, in ButtonEvent event);
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34 bool handleButtonRelease(scope IViewport viewport, in ButtonEvent event);
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35 bool handleMotion(scope IViewport viewport, in MotionEvent event);
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36 bool handleScroll(scope IViewport viewport, in ScrollEvent event);
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37 bool handleEnter(scope IViewport viewport, CrossingEvent event);
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38 bool handleLeave(scope IViewport viewport, CrossingEvent event);
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39 bool handleKeyPress(scope IViewport viewport, in KeyEvent event);
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40 bool handleKeyRelease(scope IViewport viewport, in KeyEvent event);
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42 // XXX Still not sure about these:
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43 //bool handleFocusIn(scope IViewport viewport, FocusEvent event);
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44 //bool handleFocusOut(scope IViewport viewport, FocusEvent event);
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45 }
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47 interface IGrid {
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48 void zoomChanged(double zoom);
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50 // TODO inout?
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51 bool snap(in Point a, out Point b) const;
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52 }
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54 interface IPage {
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55 // TODO
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56 }
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58 abstract class Layer {
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59 this(in string name) {
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60 _name = name;
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61 }
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63 string name() const { return _name; }
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65 Rectangle bounds() const;
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67 void draw(in Rectangle pixelDamage, scope Context pixelCr,
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68 in Rectangle modelDamage, scope Context modelCr) const;
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70 private {
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71 immutable string _name;
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72 }
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73 }