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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2007 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.TreeNode;
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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.events.PaintEvent;
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19 import dwt.graphics.GC;
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20 import dwt.graphics.Rectangle;
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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 box with a '+' or '-' sign, depending on the
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32 * expansion state. Focus indication is rendered around the box when the
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33 * control has keyboard focus.
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34 *
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35 * @see Twistie
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36 * @since 3.0
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37 */
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38 public class TreeNode : ToggleHyperlink {
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39 /**
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40 * Creates a control in a provided composite.
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41 *
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42 * @param parent
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43 * the parent
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44 * @param style
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45 * the style
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46 */
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47 public this(Composite parent, int style) {
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48 super(parent, style);
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49 innerWidth = 10;
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50 innerHeight = 10;
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51 }
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52 protected void paint(PaintEvent e) {
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53 paintHyperlink(e.gc);
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54 }
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55 protected void paintHyperlink(GC gc) {
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56 Rectangle box = getBoxBounds(gc);
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57 gc.setForeground(getDisplay().getSystemColor(
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58 DWT.COLOR_WIDGET_NORMAL_SHADOW));
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59 gc.drawRectangle(box);
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60 gc.setForeground(getForeground());
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61 gc.drawLine(box.x + 2, box.y + 4, box.x + 6, box.y + 4);
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62 if (!isExpanded()) {
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63 gc.drawLine(box.x + 4, box.y + 2, box.x + 4, box.y + 6);
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64 }
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65 if (paintFocus && getSelection()) {
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66 gc.setForeground(getForeground());
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67 gc.drawFocus(box.x - 1, box.y - 1, box.width + 3, box.height + 3);
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68 }
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69 }
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70 private Rectangle getBoxBounds(GC gc) {
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71 int x = 1;
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72 int y = 0;
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73 gc.setFont(getFont());
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74 //int height = gc.getFontMetrics().getHeight();
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75 //y = height / 2 - 4;
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76 //y = Math.max(y, 0);
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77 y = 2;
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78 return new Rectangle(x, y, 8, 8);
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79 }
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80 }
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