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annotate doodle/dia/tool_layer.d @ 57:9960c4fbd0dd

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I is for Interface
author "David Bryant <bagnose@gmail.com>"
date Sun, 08 Aug 2010 22:01:54 +0930
parents b190a9d9352e
children c63719604adb
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1 module doodle.dia.tool_layer;
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3 public {
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4 import doodle.dia.tool;
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5 }
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7 private {
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8 import std.stdio;
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9 import doodle.cairo.routines;
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10 }
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12 interface IToolStack {
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13 }
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15 class ToolLayer : Layer, IEventHandler, IToolStack {
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16 this(in Tool[] tools, in string name) {
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17 super(name);
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18 _tools = tools.dup;
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19 }
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21 // Layer overrides:
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22
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23 override Rectangle bounds() const {
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24 return Rectangle();
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25 }
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27 override void draw(const IViewport viewport,
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28 in Rectangle pixelDamage, scope Context pixelCr,
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29 in Rectangle modelDamage, scope Context modelCr) const {
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30 if (_grabbedTool) {
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31 _grabbedTool.draw(viewport, pixelDamage, pixelCr);
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32 }
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33 }
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35 // EventHandler overrides:
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37 override bool handleButtonPress(scope IViewport viewport, in ButtonEvent event) {
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38 // writefln("%s", event);
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40 if (_grabbedTool is null) {
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41 foreach_reverse(ref tool; _tools) {
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42 if (tool.handleButtonPress(viewport, event)) {
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43 _grabbedTool = &tool;
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44 _grabbedButton = event.button_name;
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45 break;
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46 }
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47 }
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48 }
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49 else {
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50 _grabbedTool.handleButtonPress(viewport, event);
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51 }
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53 return true;
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54 }
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56 override bool handleButtonRelease(scope IViewport viewport, in ButtonEvent event) {
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57 // writefln("%s", event);
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59 if (_grabbedTool !is null) {
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60 _grabbedTool.handleButtonRelease(viewport, event);
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62 if (_grabbedButton == event.button_name) {
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63 _grabbedTool = null;
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64 }
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65 }
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67 return true;
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68 }
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70 override bool handleKeyPress(scope IViewport viewport, in KeyEvent event) {
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71 // writefln("%s", event);
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73 return true;
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74 }
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76 override bool handleKeyRelease(scope IViewport viewport, in KeyEvent event) {
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77 // writefln("%s", event);
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79 return true;
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80 }
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82 override bool handleMotion(scope IViewport viewport, in MotionEvent event) {
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83 //writefln("%s", event);
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85 if (_grabbedTool is null) {
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86 foreach_reverse(ref tool; _tools) {
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87 if (tool.handleMotion(viewport, event)) {
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88 break;
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89 }
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90 }
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91 }
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92 else {
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93 _grabbedTool.handleMotion(viewport, event);
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94 }
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96 return true;
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97 }
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99 override bool handleScroll(scope IViewport viewport, in ScrollEvent event) {
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100 // writefln("%s", event);
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102 if (_grabbedTool is null) {
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103 foreach_reverse(ref tool; _tools) {
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104 if (tool.handleScroll(viewport, event)) {
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105 break;
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106 }
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107 }
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108 }
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109 else {
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110 _grabbedTool.handleScroll(viewport, event);
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111 }
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113 return true;
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114 }
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116 /*
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117 override void push(Tool tool) {
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118 }
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120 override void pop() {
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121 }
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122
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123 override void replace(Tool tool) {
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124 }
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125 */
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126
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127 private {
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128 Tool[] _tools;
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129 Tool * _grabbedTool;
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130 ButtonName _grabbedButton;
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131 }
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132 }