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1 // Written in the D programming language
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2 // www.digitalmars.com/d/
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3
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4 /*
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5 * The contents of this file are subject to the Mozilla Public License Version
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6 * 1.1 (the "License"); you may not use this file except in compliance with
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7 * the License. You may obtain a copy of the License at
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8 * http://www.mozilla.org/MPL/
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9 *
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10 * Software distributed under the License is distributed on an "AS IS" basis,
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11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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12 * for the specific language governing rights and limitations under the
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13 * License.
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14 *
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15 * The Original Code is the Dynamin library.
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16 *
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17 * The Initial Developer of the Original Code is Jordan Miner.
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18 * Portions created by the Initial Developer are Copyright (C) 2006-2009
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19 * the Initial Developer. All Rights Reserved.
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20 *
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21 * Contributor(s):
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22 * Jordan Miner <jminer7@gmail.com>
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23 *
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24 */
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25
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26 module dynamin.gui.button;
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27
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28 import dynamin.all_core;
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29 import dynamin.all_gui;
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30 import dynamin.all_painting;
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31 import tango.io.Stdout;
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32 import dynamin.c.cairo; // TODO: remove
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33
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34 // TODO: maybe change to ControlState and add Disabled ?
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35 enum ButtonState {
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36 Normal, Hot, Pressed
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37 }
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38 // TODO: move to another file
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39 enum TextImageRelation {
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40 Overlay, TextBeforeImage, ImageBeforeText, TextAboveImage, ImageAboveText
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41 }
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42
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43 /**
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44 * A button is a control that can be clicked to perform an action.
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45 *
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46 * The appearance of a button with Windows Classic:
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47 *
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48 * $(IMAGE ../web/example_button.png)
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49 */
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50 class Button : Control {
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51 protected:
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52 ButtonState _state;
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53 override void whenMouseDragged(MouseEventArgs e) {
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54 if(contains(e.x, e.y))
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55 state = ButtonState.Pressed;
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56 else
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57 state = ButtonState.Normal;
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58 }
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59 override void whenMouseEntered(EventArgs e) {
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60 state = ButtonState.Hot;
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61 }
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62 override void whenMouseLeft(EventArgs e) {
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63 state = ButtonState.Normal;
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64 }
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65 override void whenMouseDown(MouseEventArgs e) {
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66 if(e.button == MouseButton.Left) {
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67 state = ButtonState.Pressed;
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68 focus();
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69 }
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70 }
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71 override void whenMouseUp(MouseEventArgs e) {
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72 if(state != ButtonState.Pressed) return;
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73 state = ButtonState.Hot;
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74 clicked(new EventArgs);
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75 }
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76 override void whenKeyDown(KeyEventArgs e) {
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77 if(e.key == Key.Space)
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78 state = ButtonState.Pressed;
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79 }
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80 override void whenKeyUp(KeyEventArgs e) {
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81 if(e.key == Key.Space) {
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82 if(state != ButtonState.Pressed) return;
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83 state = ButtonState.Normal;
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84 clicked(new EventArgs);
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85 }
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86 }
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87 override void whenPainting(PaintingEventArgs e) {
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88 Theme.current.Button_paint(this, e.graphics);
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89 return;
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90 // TODO: move to a theme or delete
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91 with(e.graphics) {
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92 if(_state == ButtonState.Hot)
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93 source = Color(200, 0, 0);
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94 else if(_state == ButtonState.Pressed)
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95 source = Color(110, 0, 0);
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96 else
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97 source = Color(220, 80, 80);
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98 moveTo(3, 0);
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99 lineTo(width-3, 0);
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100 lineTo(width, 3);
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101 lineTo(width, height-3);
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102 lineTo(width-3, height);
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103 lineTo(3, height);
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104 lineTo(0, height-3);
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105 lineTo(0, 3);
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106 closePath();
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107 fill();
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108 auto grad = cairo_pattern_create_linear(0, 0, 0, height/2+3);
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109 cairo_pattern_add_color_stop_rgba(grad, 0, 1, 1, 1, .4);
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110 cairo_pattern_add_color_stop_rgba(grad, 1, 1, 1, 1, .05);
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111 cairo_set_source(handle, grad);
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112 cairo_pattern_destroy(grad);
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113 moveTo(3, 0);
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114 lineTo(width-3, 0);
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115 lineTo(width, 3);
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116 lineTo(width, cast(int)height/2-3);
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117 lineTo(width-3, cast(int)height/2);
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118 lineTo(3, cast(int)height/2);
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119 lineTo(0, cast(int)height/2+3);
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120 lineTo(0, 3);
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121 closePath();
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122 fill();
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123
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124 source = _state == ButtonState.Pressed ? Color.White : Color.Black;
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125 fontSize = 13;
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126 drawText(text, 5, height/2);
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127 }
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128 return;
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129
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130 }
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131 public void paintFore(Graphics g) {
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132 auto extents = g.getTextExtents(text);
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133 g.drawText(text, (width-extents.width)/2, (height-extents.height)/2);
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134 }
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135
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136 public:
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137 /// Override this method in a subclass to handle the Clicked event.
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138 protected void whenClicked(EventArgs e) { }
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139 /// This event occurs after the button has been clicked.
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140 Event!() clicked;
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141
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142 this() {
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143 clicked = new Event!()(&whenClicked);
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144 _focusable = true;
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145 }
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146 this(string text) {
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147 this();
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148 this.text = text;
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149 }
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150 override Size bestSize() { return Theme.current.Button_bestSize(this); }
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151 ButtonState state() { return _state; }
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152 void state(ButtonState s) { _state = s; repaint(); }
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153 }
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