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annotate tool_layer.d @ 14:0b7e7d43a79d

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author "David Bryant <bagnose@gmail.com>"
date Sun, 12 Jul 2009 01:23:32 +0930
parents a093c4fbdd43
children 9e63308b749c
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1 module tool_layer;
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3 import std.stdio;
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4
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5 import cairo.Context;
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6 import cairo_support;
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7 import tool;
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8 private import icanvas;
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9 private import tk.types;
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10 private import tk.geometry;
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11 private import tk.events;
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13 class ToolLayer : Layer, EventHandler {
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14 this(in Tool[] tools, in string name) {
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15 super(name);
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16 mTools = tools.dup;
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17 }
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19 override bool handle_button_press(Viewport viewport, in ButtonEvent event) {
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20 // writefln("%s", event);
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21
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22 if (mGrabbedTool is null) {
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23 foreach_reverse(ref tool; mTools) {
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24 if (tool.handle_button_press(viewport, event)) {
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25 mGrabbedTool = &tool;
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26 mGrabbedButton = event.button_name;
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27 break;
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28 }
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29 }
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30 }
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31 else {
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32 mGrabbedTool.handle_button_press(viewport, event);
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33 }
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34
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35 return true;
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36 }
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38 override bool handle_button_release(Viewport viewport, in ButtonEvent event) {
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39 // writefln("%s", event);
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41 if (mGrabbedTool !is null) {
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42 mGrabbedTool.handle_button_release(viewport, event);
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44 if (mGrabbedButton == event.button_name) {
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45 mGrabbedTool = null;
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46 }
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47 }
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48
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49 return true;
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50 }
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51
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52 override bool handle_key_press(Viewport viewport, in KeyEvent event) {
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53 // writefln("%s", event);
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54
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55 return true;
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56 }
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58 override bool handle_key_release(Viewport viewport, in KeyEvent event) {
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59 // writefln("%s", event);
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60
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61 return true;
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62 }
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64 override bool handle_motion(Viewport viewport, in MotionEvent event) {
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65 // writefln("%s", event);
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67 if (mGrabbedTool is null) {
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68 foreach_reverse(ref tool; mTools) {
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69 if (tool.handle_motion(viewport, event)) {
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70 break;
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71 }
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72 }
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73 }
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74 else {
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75 mGrabbedTool.handle_motion(viewport, event);
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76 }
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78 return true;
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79 }
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81 override bool handle_scroll(Viewport viewport, in ScrollEvent event) {
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82 // writefln("%s", event);
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84 if (mGrabbedTool is null) {
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85 foreach_reverse(ref tool; mTools) {
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86 if (tool.handle_scroll(viewport, event)) {
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87 break;
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88 }
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89 }
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90 }
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91 else {
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92 mGrabbedTool.handle_scroll(viewport, event);
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93 }
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95 return true;
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96 }
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97
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98 override Rectangle bounds() const {
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99 return Rectangle();
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100 }
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101
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102 override void draw(const Viewport viewport, in Rectangle damage,
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103 Context model_cr, Context screen_cr) const {
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104 }
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105
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106 /*
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107 override void push(Tool tool) {
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108 }
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110 override void pop() {
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111 }
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113 override void replace(Tool tool) {
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114 }
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115 */
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116
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117 private {
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118 Tool[] mTools;
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119 Tool * mGrabbedTool;
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120 ButtonName mGrabbedButton;
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121 }
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122 }