Mercurial > projects > dwt-linux
annotate dwt/dnd/TableDropTargetEffect.d @ 240:ce446666f5a2
Update to SWT 3.4M7
| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 12 May 2008 19:13:01 +0200 |
| parents | f2e04420fd6c |
| children | c0d810de7093 |
| rev | line source |
|---|---|
|
150
f2e04420fd6c
reworked overrides and superclass aliases
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
1 /******************************************************************************* |
| 92 | 2 * Copyright (c) 2000, 2007 IBM Corporation and others. |
| 3 * All rights reserved. This program and the accompanying materials | |
| 4 * are made available under the terms of the Eclipse Public License v1.0 | |
| 5 * which accompanies this distribution, and is available at | |
| 6 * http://www.eclipse.org/legal/epl-v10.html | |
| 7 * | |
| 8 * Contributors: | |
| 9 * IBM Corporation - initial API and implementation | |
| 108 | 10 * Port to the D programming language: |
| 11 * Frank Benoit <benoit@tionex.de> | |
| 92 | 12 *******************************************************************************/ |
| 13 module dwt.dnd.TableDropTargetEffect; | |
| 14 | |
| 15 | |
| 16 import dwt.graphics.Point; | |
| 17 import dwt.internal.gtk.OS; | |
| 18 import dwt.widgets.Table; | |
| 19 import dwt.dnd.DropTargetEffect; | |
| 20 import dwt.dnd.DropTargetEvent; | |
| 21 import dwt.dnd.DND; | |
| 22 | |
| 23 import dwt.dwthelper.System; | |
| 24 | |
| 25 /** | |
| 26 * This class provides a default drag under effect (eg. select, insert and scroll) | |
| 27 * when a drag occurs over a <code>Table</code>. | |
| 28 * | |
| 29 * <p>Classes that wish to provide their own drag under effect for a <code>Table</code> | |
| 30 * can extend the <code>TableDropTargetEffect</code> and override any applicable methods | |
| 31 * in <code>TableDropTargetEffect</code> to display their own drag under effect.</p> | |
| 32 * | |
| 33 * Subclasses that override any methods of this class must call the corresponding | |
| 34 * <code>super</code> method to get the default drag under effect implementation. | |
| 35 * | |
| 36 * <p>The feedback value is either one of the FEEDBACK constants defined in | |
| 37 * class <code>DND</code> which is applicable to instances of this class, | |
| 38 * or it must be built by <em>bitwise OR</em>'ing together | |
| 39 * (that is, using the <code>int</code> "|" operator) two or more | |
| 40 * of those <code>DND</code> effect constants. | |
| 41 * </p> | |
| 42 * <p> | |
| 43 * <dl> | |
| 44 * <dt><b>Feedback:</b></dt> | |
| 45 * <dd>FEEDBACK_SELECT, FEEDBACK_SCROLL</dd> | |
| 46 * </dl> | |
| 47 * </p> | |
| 48 * | |
| 49 * @see DropTargetAdapter | |
| 50 * @see DropTargetEvent | |
| 51 * | |
| 52 * @since 3.3 | |
| 53 */ | |
| 54 public class TableDropTargetEffect : DropTargetEffect { | |
| 55 static const int SCROLL_HYSTERESIS = 150; // milli seconds | |
| 56 | |
| 57 int scrollIndex; | |
| 58 long scrollBeginTime; | |
| 59 | |
| 60 /** | |
| 61 * Creates a new <code>TableDropTargetEffect</code> to handle the drag under effect on the specified | |
| 62 * <code>Table</code>. | |
| 63 * | |
| 64 * @param table the <code>Table</code> over which the user positions the cursor to drop the data | |
| 65 */ | |
| 66 public this(Table table) { | |
| 67 super(table); | |
| 68 } | |
| 69 | |
| 70 int checkEffect(int effect) { | |
| 71 // Some effects are mutually exclusive. Make sure that only one of the mutually exclusive effects has been specified. | |
| 72 if ((effect & DND.FEEDBACK_SELECT) !is 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER & ~DND.FEEDBACK_INSERT_BEFORE; | |
| 73 if ((effect & DND.FEEDBACK_INSERT_BEFORE) !is 0) effect = effect & ~DND.FEEDBACK_INSERT_AFTER; | |
| 74 return effect; | |
| 75 } | |
| 76 | |
| 77 /** | |
| 78 * This implementation of <code>dragEnter</code> provides a default drag under effect | |
| 79 * for the feedback specified in <code>event.feedback</code>. | |
| 80 * | |
| 81 * For additional information see <code>DropTargetAdapter.dragEnter</code>. | |
| 82 * | |
| 83 * Subclasses that override this method should call <code>super.dragEnter(event)</code> | |
| 84 * to get the default drag under effect implementation. | |
| 85 * | |
| 86 * @param event the information associated with the drag enter event | |
| 87 * | |
| 88 * @see DropTargetAdapter | |
| 89 * @see DropTargetEvent | |
| 90 */ | |
|
150
f2e04420fd6c
reworked overrides and superclass aliases
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
91 public override void dragEnter(DropTargetEvent event) { |
| 92 | 92 scrollBeginTime = 0; |
| 93 scrollIndex = -1; | |
| 94 } | |
| 95 | |
| 96 /** | |
| 97 * This implementation of <code>dragLeave</code> provides a default drag under effect | |
| 98 * for the feedback specified in <code>event.feedback</code>. | |
| 99 * | |
| 100 * For additional information see <code>DropTargetAdapter.dragLeave</code>. | |
| 101 * | |
| 102 * Subclasses that override this method should call <code>super.dragLeave(event)</code> | |
| 103 * to get the default drag under effect implementation. | |
| 104 * | |
| 105 * @param event the information associated with the drag leave event | |
| 106 * | |
| 107 * @see DropTargetAdapter | |
| 108 * @see DropTargetEvent | |
| 109 */ | |
|
150
f2e04420fd6c
reworked overrides and superclass aliases
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
110 public override void dragLeave(DropTargetEvent event) { |
| 92 | 111 Table table = cast(Table) control; |
| 112 auto handle = table.handle; | |
| 240 | 113 OS.gtk_tree_view_set_drag_dest_row(handle, null, OS.GTK_TREE_VIEW_DROP_BEFORE); |
| 92 | 114 |
| 115 scrollBeginTime = 0; | |
| 116 scrollIndex = -1; | |
| 117 } | |
| 118 | |
| 119 /** | |
| 120 * This implementation of <code>dragOver</code> provides a default drag under effect | |
| 121 * for the feedback specified in <code>event.feedback</code>. The class description | |
| 122 * lists the FEEDBACK constants that are applicable to the class. | |
| 123 * | |
| 124 * For additional information see <code>DropTargetAdapter.dragOver</code>. | |
| 125 * | |
| 126 * Subclasses that override this method should call <code>super.dragOver(event)</code> | |
| 127 * to get the default drag under effect implementation. | |
| 128 * | |
| 129 * @param event the information associated with the drag over event | |
| 130 * | |
| 131 * @see DropTargetAdapter | |
| 132 * @see DropTargetEvent | |
| 133 * @see DND#FEEDBACK_SELECT | |
| 134 * @see DND#FEEDBACK_SCROLL | |
| 135 */ | |
|
150
f2e04420fd6c
reworked overrides and superclass aliases
Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
136 public override void dragOver(DropTargetEvent event) { |
| 92 | 137 Table table = cast(Table) control; |
| 138 auto handle = table.handle; | |
| 139 int effect = checkEffect(event.feedback); | |
| 140 Point coordinates = new Point(event.x, event.y); | |
| 141 coordinates = table.toControl(coordinates); | |
| 142 void* path; | |
| 143 OS.gtk_tree_view_get_path_at_pos (handle, coordinates.x, coordinates.y, &path, null, null, null); | |
| 144 int index = -1; | |
| 145 if (path !is null) { | |
| 146 auto indices = OS.gtk_tree_path_get_indices (path); | |
| 147 if (indices !is null) { | |
| 148 index = indices[0]; | |
| 149 } | |
| 150 } | |
| 151 if ((effect & DND.FEEDBACK_SCROLL) is 0) { | |
| 152 scrollBeginTime = 0; | |
| 153 scrollIndex = -1; | |
| 154 } else { | |
| 155 if (index !is -1 && scrollIndex is index && scrollBeginTime !is 0) { | |
| 156 if (System.currentTimeMillis() >= scrollBeginTime) { | |
| 157 if (coordinates.y < table.getItemHeight()) { | |
| 158 OS.gtk_tree_path_prev(path); | |
| 159 } else { | |
| 160 OS.gtk_tree_path_next(path); | |
| 161 } | |
| 162 if (path !is null) { | |
| 163 OS.gtk_tree_view_scroll_to_cell(handle, path, null, false, 0, 0); | |
| 164 OS.gtk_tree_path_free(path); | |
| 165 path = null; | |
| 166 OS.gtk_tree_view_get_path_at_pos (handle, coordinates.x, coordinates.y, &path, null, null, null); | |
| 167 } | |
| 168 scrollBeginTime = 0; | |
| 169 scrollIndex = -1; | |
| 170 } | |
| 171 } else { | |
| 172 scrollBeginTime = System.currentTimeMillis() + SCROLL_HYSTERESIS; | |
| 173 scrollIndex = index; | |
| 174 } | |
| 175 } | |
| 176 if (path !is null) { | |
| 177 int position = 0; | |
| 178 if ((effect & DND.FEEDBACK_SELECT) !is 0) position = OS.GTK_TREE_VIEW_DROP_INTO_OR_BEFORE; | |
| 179 //if ((effect & DND.FEEDBACK_INSERT_BEFORE) !is 0) position = OS.GTK_TREE_VIEW_DROP_BEFORE; | |
| 180 //if ((effect & DND.FEEDBACK_INSERT_AFTER) !is 0) position = OS.GTK_TREE_VIEW_DROP_AFTER; | |
| 181 if (position !is 0) { | |
| 182 OS.gtk_tree_view_set_drag_dest_row(handle, path, OS.GTK_TREE_VIEW_DROP_INTO_OR_BEFORE); | |
| 183 } else { | |
| 240 | 184 OS.gtk_tree_view_set_drag_dest_row(handle, null, OS.GTK_TREE_VIEW_DROP_BEFORE); |
| 92 | 185 } |
| 186 } else { | |
| 240 | 187 OS.gtk_tree_view_set_drag_dest_row(handle, null, OS.GTK_TREE_VIEW_DROP_BEFORE); |
| 92 | 188 } |
| 189 if (path !is null) OS.gtk_tree_path_free (path ); | |
| 190 } | |
| 191 } |