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1 /*******************************************************************************
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2 * Copyright (c) 2006, 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 * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
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11 * - fix for bug 187817
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12 * Port to the D programming language:
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13 * Frank Benoit <benoit@tionex.de>
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14 *******************************************************************************/
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15
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16 module dwtx.jface.viewers.ColumnViewerEditorActivationStrategy;
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17
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18 import dwtx.jface.viewers.ViewerCell;
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19 import dwtx.jface.viewers.ColumnViewer;
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20 import dwtx.jface.viewers.ColumnViewerEditorActivationEvent;
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21 import dwtx.jface.viewers.IStructuredSelection;
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22
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23 import dwt.events.KeyEvent;
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24 import dwt.events.KeyListener;
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25 import dwt.events.MouseEvent;
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26
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27 import dwt.dwthelper.utils;
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28
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29 /**
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30 * This class is responsible to determine if a cell selection event is triggers
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31 * an editor activation. Implementors can extend and overwrite to implement
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32 * custom editing behavior
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33 *
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34 * @since 3.3
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35 */
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36 public class ColumnViewerEditorActivationStrategy {
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37 private ColumnViewer viewer;
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38
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39 private KeyListener keyboardActivationListener;
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40
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41 /**
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42 * @param viewer
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43 * the viewer the editor support is attached to
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44 */
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45 public this(ColumnViewer viewer) {
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46 this.viewer = viewer;
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47 }
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48
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49 /**
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50 * @param event
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51 * the event triggering the action
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52 * @return <code>true</code> if this event should open the editor
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53 */
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54 protected bool isEditorActivationEvent(
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55 ColumnViewerEditorActivationEvent event) {
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56 bool singleSelect = (cast(IStructuredSelection)viewer.getSelection()).size() is 1;
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57 bool isLeftMouseSelect = event.eventType is ColumnViewerEditorActivationEvent.MOUSE_CLICK_SELECTION && (cast(MouseEvent)event.sourceEvent).button is 1;
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58
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59 return singleSelect && (isLeftMouseSelect
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60 || event.eventType is ColumnViewerEditorActivationEvent.PROGRAMMATIC
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61 || event.eventType is ColumnViewerEditorActivationEvent.TRAVERSAL);
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62 }
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63 package bool isEditorActivationEvent_package(ColumnViewerEditorActivationEvent event){
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64 return isEditorActivationEvent(event);
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65 }
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66
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67 /**
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68 * @return the cell holding the current focus
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69 */
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70 private ViewerCell getFocusCell() {
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71 return viewer.getColumnViewerEditor().getFocusCell();
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72 }
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73
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74 /**
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75 * @return the viewer
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76 */
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77 public ColumnViewer getViewer() {
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78 return viewer;
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79 }
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80
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81 /**
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82 * Enable activation of cell editors by keyboard
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83 *
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84 * @param enable
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85 * <code>true</code> to enable
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86 */
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87 public void setEnableEditorActivationWithKeyboard(bool enable) {
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88 if (enable) {
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89 if (keyboardActivationListener is null) {
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90 keyboardActivationListener = new class KeyListener {
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91
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92 public void keyPressed(KeyEvent e) {
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93 ViewerCell cell = getFocusCell();
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94
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95 if (cell !is null) {
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96 viewer
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97 .triggerEditorActivationEvent_package(new ColumnViewerEditorActivationEvent(
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98 cell, e));
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99 }
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100 }
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101
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102 public void keyReleased(KeyEvent e) {
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103
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104 }
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105
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106 };
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107 viewer.getControl().addKeyListener(keyboardActivationListener);
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108 }
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109 } else {
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110 if (keyboardActivationListener !is null) {
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111 viewer.getControl().removeKeyListener(
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112 keyboardActivationListener);
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113 keyboardActivationListener = null;
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114 }
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115 }
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116 }
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117
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118 }
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