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annotate tool_layer.d @ 17:c643c04e3f5e

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author David Bryant <daveb@acres.com.au>
date Mon, 13 Jul 2009 16:46:21 +0930
parents 9e63308b749c
children df8d81d9f499
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1 module tool_layer;
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3 private {
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4 import std.stdio;
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5 import cairo_support;
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6 }
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8 public {
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9 import tool;
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10 }
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12 class ToolLayer : Layer, EventHandler {
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13 this(in Tool[] tools, in string name) {
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14 super(name);
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15 mTools = tools.dup;
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16 }
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18 override bool handle_button_press(Viewport viewport, in ButtonEvent event) {
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19 // writefln("%s", event);
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21 if (mGrabbedTool is null) {
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22 foreach_reverse(ref tool; mTools) {
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23 if (tool.handle_button_press(viewport, event)) {
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24 mGrabbedTool = &tool;
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25 mGrabbedButton = event.button_name;
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26 break;
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27 }
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28 }
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29 }
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30 else {
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31 mGrabbedTool.handle_button_press(viewport, event);
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32 }
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33
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34 return true;
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35 }
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37 override bool handle_button_release(Viewport viewport, in ButtonEvent event) {
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38 // writefln("%s", event);
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40 if (mGrabbedTool !is null) {
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41 mGrabbedTool.handle_button_release(viewport, event);
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43 if (mGrabbedButton == event.button_name) {
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44 mGrabbedTool = null;
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45 }
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46 }
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47
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48 return true;
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49 }
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51 override bool handle_key_press(Viewport viewport, in KeyEvent event) {
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52 // writefln("%s", event);
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53
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54 return true;
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55 }
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57 override bool handle_key_release(Viewport viewport, in KeyEvent event) {
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58 // writefln("%s", event);
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59
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60 return true;
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61 }
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63 override bool handle_motion(Viewport viewport, in MotionEvent event) {
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64 //writefln("%s", event);
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66 if (mGrabbedTool is null) {
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67 foreach_reverse(ref tool; mTools) {
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68 if (tool.handle_motion(viewport, event)) {
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69 break;
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70 }
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71 }
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72 }
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73 else {
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74 mGrabbedTool.handle_motion(viewport, event);
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75 }
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77 return true;
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78 }
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80 override bool handle_scroll(Viewport viewport, in ScrollEvent event) {
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81 // writefln("%s", event);
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83 if (mGrabbedTool is null) {
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84 foreach_reverse(ref tool; mTools) {
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85 if (tool.handle_scroll(viewport, event)) {
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86 break;
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87 }
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88 }
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89 }
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90 else {
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91 mGrabbedTool.handle_scroll(viewport, event);
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92 }
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94 return true;
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95 }
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96
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97 override Rectangle bounds() const {
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98 return Rectangle();
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99 }
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100
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101 override void draw(const Viewport viewport, in Rectangle damage,
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102 Context model_cr, Context screen_cr) const {
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103 }
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104
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105 /*
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106 override void push(Tool tool) {
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107 }
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108
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109 override void pop() {
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110 }
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112 override void replace(Tool tool) {
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113 }
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114 */
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115
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116 private {
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117 Tool[] mTools;
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118 Tool * mGrabbedTool;
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119 ButtonName mGrabbedButton;
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120 }
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121 }