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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.ui.forms.widgets.Twistie;
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14
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15 import dwtx.ui.forms.widgets.ToggleHyperlink;
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16
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17 import dwt.DWT;
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18 import dwt.graphics.Color;
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19 import dwt.graphics.GC;
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20 import dwt.graphics.Point;
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21 import dwt.widgets.Composite;
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22
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23 import dwt.dwthelper.utils;
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24
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25 /**
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26 * A custom selectable control that can be used to control areas that can be
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27 * expanded or collapsed. The control control can be toggled between selected
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28 * and deselected state with a mouse or by pressing 'Enter' while the control
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29 * has focus.
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30 * <p>
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31 * The control is rendered as a triangle that points to the right in the
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32 * collapsed and down in the expanded state. Triangle color can be changed.
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33 *
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34 * @see TreeNode
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35 * @since 3.0
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36 */
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37 public class Twistie : ToggleHyperlink {
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38 private static const int[] onPoints = [ 0, 2, 8, 2, 4, 6 ];
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39
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40 private static const int[] offPoints = [ 2, -1, 2, 8, 6, 4 ];
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41
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42 /**
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43 * Creates a control in a provided composite.
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44 *
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45 * @param parent
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46 * the parent
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47 * @param style
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48 * the style
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49 */
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50 public this(Composite parent, int style) {
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51 super(parent, style);
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52 innerWidth = 9;
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53 innerHeight = 9;
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54 }
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55
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56 /*
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57 * @see SelectableControl#paint(GC)
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58 */
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59 protected void paintHyperlink(GC gc) {
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60 Color bg;
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61 if (!isEnabled())
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62 bg = getDisplay().getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW);
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63 else if (hover && getHoverDecorationColor() !is null)
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64 bg = getHoverDecorationColor();
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65 else if (getDecorationColor() !is null)
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66 bg = getDecorationColor();
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67 else
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68 bg = getForeground();
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69 gc.setBackground(bg);
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70 int[] data;
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71 Point size = getSize();
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72 int x = (size.x - 9) / 2;
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73 int y = (size.y - 9) / 2;
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74 if (isExpanded())
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75 data = translate(onPoints, x, y);
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76 else
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77 data = translate(offPoints, x, y);
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78 gc.fillPolygon(data);
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79 gc.setBackground(getBackground());
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80 }
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81
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82 private int[] translate(int[] data, int x, int y) {
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83 int[] target = new int[data.length];
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84 for (int i = 0; i < data.length; i += 2) {
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85 target[i] = data[i] + x;
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86 }
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87 for (int i = 1; i < data.length; i += 2) {
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88 target[i] = data[i] + y;
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89 }
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90 return target;
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91 }
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92
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93 /*
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94 * (non-Javadoc)
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95 *
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96 * @see dwt.widgets.Control#setEnabled(bool)
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97 */
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98 public void setEnabled(bool enabled) {
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99 super.setEnabled(enabled);
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100 redraw();
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101 }
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102 }
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