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annotate dwt/dnd/DND.d @ 238:380bad9f6852
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| author | Frank Benoit <benoit@tionex.de> |
|---|---|
| date | Mon, 05 May 2008 00:42:55 +0200 |
| parents | 52b32f5cb1e0 |
| children | ce446666f5a2 |
| rev | line source |
|---|---|
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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.DND; | |
| 14 | |
| 238 | 15 import dwt.dwthelper.utils; |
| 16 | |
| 92 | 17 |
| 18 import dwt.DWT; | |
| 19 import dwt.DWTError; | |
| 20 import dwt.DWTException; | |
| 21 | |
| 22 import tango.util.Convert; | |
| 23 | |
| 24 /** | |
| 25 * | |
| 26 * Class DND contains all the constants used in defining a | |
| 27 * DragSource or a DropTarget. | |
| 28 * | |
| 29 */ | |
| 30 public class DND { | |
| 31 | |
| 32 /** | |
| 33 * The transfer mechanism for data that is being cut | |
| 34 * and then pasted or copied and then pasted (value is 1). | |
| 35 * | |
| 36 * @see Clipboard | |
| 37 * | |
| 38 * @since 3.1 | |
| 39 */ | |
| 40 public const static int CLIPBOARD = 1 << 0; | |
| 41 | |
| 42 /** | |
| 43 * The transfer mechanism for clients that use the selection | |
| 44 * mechanism (value is 2). | |
| 45 * | |
| 46 * @see Clipboard | |
| 47 * | |
| 48 * @since 3.1 | |
| 49 */ | |
| 50 public const static int SELECTION_CLIPBOARD = 1 << 1; | |
| 51 | |
| 52 /** | |
| 53 * Drag and Drop Operation: no drag/drop operation performed | |
| 54 * (value is 0). | |
| 55 */ | |
| 56 public const static int DROP_NONE = 0; | |
| 57 | |
| 58 /** | |
| 59 * Drag and Drop Operation: a copy of the data in the drag source is | |
| 60 * added to the drop target (value is 1 << 0). | |
| 61 */ | |
| 62 public const static int DROP_COPY = 1 << 0; | |
| 63 | |
| 64 /** | |
| 65 * Drag and Drop Operation: a copy of the data is added to the drop target and | |
| 66 * the original data is removed from the drag source (value is 1 << 1). | |
| 67 */ | |
| 68 public const static int DROP_MOVE = 1 << 1; | |
| 69 | |
| 70 /** | |
| 71 * Drag and Drop Operation: the drop target makes a link to the data in | |
| 72 * the drag source (value is 1 << 2). | |
| 73 */ | |
| 74 public const static int DROP_LINK = 1 << 2; | |
| 75 | |
| 76 /** | |
| 77 * Drag and Drop Operation: the drop target moves the data and the drag source removes | |
| 78 * any references to the data and updates its display. This is not available on all platforms | |
| 79 * and is only used when a non-DWT application is the drop target. In this case, the DWT | |
| 80 * drag source is informed in the dragFinished event that the drop target has moved the data. | |
| 81 * (value is 1 << 3). | |
| 82 * | |
| 83 * @see DragSourceListener#dragFinished | |
| 84 */ | |
| 85 public const static int DROP_TARGET_MOVE = 1 << 3; | |
| 86 | |
| 87 /** | |
| 88 * Drag and Drop Operation: During a dragEnter event or a dragOperationChanged, if no modifier keys | |
| 89 * are pressed, the operation is set to DROP_DEFAULT. The application can choose what the default | |
| 90 * operation should be by setting a new value in the operation field. If no value is choosen, the | |
| 91 * default operation for the platform will be selected (value is 1 << 4). | |
| 92 * | |
| 93 * @see DropTargetListener#dragEnter | |
| 94 * @see DropTargetListener#dragOperationChanged | |
| 95 * @since 2.0 | |
| 96 */ | |
| 97 public const static int DROP_DEFAULT = 1 << 4; | |
| 98 | |
| 99 /** | |
| 100 * DragSource Event: the drop has successfully completed or has been terminated (such as hitting | |
| 101 * the ESC key); perform cleanup such as removing data on a move operation (value is 2000). | |
| 102 */ | |
| 103 public static const int DragEnd = 2000; | |
| 104 | |
| 105 /** | |
| 106 * DragSource Event: the data to be dropped is required from the drag source (value is 2001). | |
| 107 */ | |
| 108 public static const int DragSetData = 2001; | |
| 109 | |
| 110 /** | |
| 111 * DropTarget Event: the cursor has entered the drop target boundaries (value is 2002). | |
| 112 */ | |
| 113 public static const int DragEnter = 2002; | |
| 114 | |
| 115 /** | |
| 116 * DropTarget Event: the cursor has left the drop target boundaries OR the drop | |
| 117 * operation has been cancelled (such as by hitting ECS) OR the drop is about to | |
| 118 * happen (user has released the mous ebutotn over this target) (value is 2003). | |
| 119 */ | |
| 120 public static const int DragLeave = 2003; | |
| 121 | |
| 122 /** | |
| 123 * DropTarget Event: the cursor is over the drop target (value is 2004). | |
| 124 */ | |
| 125 public static const int DragOver = 2004; | |
| 126 | |
| 127 /** | |
| 128 * DropTarget Event: the operation being performed has changed usually due to the user | |
| 129 * changing the selected modifier keys while dragging (value is 2005). | |
| 130 */ | |
| 131 public static const int DragOperationChanged = 2005; | |
| 132 | |
| 133 /** | |
| 134 * DropTarget Event: the data has been dropped (value is 2006). | |
| 135 */ | |
| 136 public static const int Drop = 2006; | |
| 137 | |
| 138 /** | |
| 139 * DropTarget Event: the drop target is given a last chance to modify the drop (value is 2007). | |
| 140 */ | |
| 141 public static const int DropAccept = 2007; | |
| 142 | |
| 143 /** | |
| 144 * DragSource Event: a drag is about to begin (value is 2008). | |
| 145 */ | |
| 146 public static const int DragStart = 2008; | |
| 147 | |
| 148 /** | |
| 149 * DropTarget drag under effect: No effect is shown (value is 0). | |
| 150 */ | |
| 151 public static const int FEEDBACK_NONE = 0; | |
| 152 | |
| 153 /** | |
| 154 * DropTarget drag under effect: The item under the cursor is selected; applies to tables | |
| 155 * and trees (value is 1). | |
| 156 */ | |
| 157 public static const int FEEDBACK_SELECT = 1; | |
| 158 | |
| 159 /** | |
| 160 * DropTarget drag under effect: An insertion mark is shown before the item under the cursor; applies to | |
| 161 * trees (value is 2). | |
| 162 */ | |
| 163 public static const int FEEDBACK_INSERT_BEFORE = 2; | |
| 164 | |
| 165 /** | |
| 166 * DropTarget drag under effect:An insertion mark is shown after the item under the cursor; applies to | |
| 167 * trees (value is 4). | |
| 168 */ | |
| 169 public static const int FEEDBACK_INSERT_AFTER = 4; | |
| 170 | |
| 171 /** | |
| 172 * DropTarget drag under effect: The widget is scrolled up or down to allow the user to drop on items that | |
| 173 * are not currently visible; applies to tables and trees (value is 8). | |
| 174 */ | |
| 175 public static const int FEEDBACK_SCROLL = 8; | |
| 176 | |
| 177 /** | |
| 178 * DropTarget drag under effect: The item currently under the cursor is expanded to allow the user to | |
| 179 * select a drop target from a sub item; applies to trees (value is 16). | |
| 180 */ | |
| 181 public static const int FEEDBACK_EXPAND = 16; | |
| 182 | |
| 183 /** | |
| 184 * Error code: drag source can not be initialized (value is 2000). | |
| 185 */ | |
| 186 public static const int ERROR_CANNOT_INIT_DRAG = 2000; | |
| 187 | |
| 188 /** | |
| 189 * Error code: drop target cannot be initialized (value is 2001). | |
| 190 */ | |
| 191 public static const int ERROR_CANNOT_INIT_DROP = 2001; | |
| 192 | |
| 193 /** | |
| 194 * Error code: Data can not be set on system clipboard (value is 2002). | |
| 195 */ | |
| 196 public static const int ERROR_CANNOT_SET_CLIPBOARD = 2002; | |
| 197 | |
| 198 /** | |
| 199 * Error code: Data does not have correct format for type (value is 2003). | |
| 200 * @since 3.1 | |
| 201 */ | |
| 202 public static const int ERROR_INVALID_DATA = 2003; | |
| 203 | |
| 204 | |
| 238 | 205 static const String INIT_DRAG_MESSAGE = "Cannot initialize Drag"; //$NON-NLS-1$ |
| 206 static const String INIT_DROP_MESSAGE = "Cannot initialize Drop"; //$NON-NLS-1$ | |
| 207 static const String CANNOT_SET_CLIPBOARD_MESSAGE = "Cannot set data in clipboard"; //$NON-NLS-1$ | |
| 208 static const String INVALID_DATA_MESSAGE = "Data does not have correct format for type"; //$NON-NLS-1$ | |
| 92 | 209 |
| 210 /** | |
| 211 * Throws an appropriate exception based on the passed in error code. | |
| 212 * | |
| 213 * @param code the DND error code | |
| 214 */ | |
| 215 public static void error (int code) { | |
| 216 error (code, 0); | |
| 217 } | |
| 218 | |
| 219 /** | |
| 220 * Throws an appropriate exception based on the passed in error code. | |
| 221 * The <code>hresult</code> argument should be either 0, or the | |
| 222 * platform specific error code. | |
| 223 * <p> | |
| 224 * In DND, errors are reported by throwing one of three exceptions: | |
| 225 * <dl> | |
| 226 * <dd>java.lang.IllegalArgumentException</dd> | |
| 227 * <dt>thrown whenever one of the API methods is invoked with an illegal argument</dt> | |
| 228 * <dd>org.eclipse.swt.DWTException (extends java.lang.RuntimeException)</dd> | |
| 229 * <dt>thrown whenever a recoverable error happens internally in DWT</dt> | |
| 230 * <dd>org.eclipse.swt.DWTError (extends java.lang.Error)</dd> | |
| 231 * <dt>thrown whenever a <b>non-recoverable</b> error happens internally in DWT</dt> | |
| 232 * </dl> | |
| 233 * This method provides the logic which maps between error codes | |
| 234 * and one of the above exceptions. | |
| 235 * </p> | |
| 236 * | |
| 237 * @param code the DND error code. | |
| 238 * @param hresult the platform specific error code. | |
| 239 * | |
| 240 * @see DWTError | |
| 241 * @see DWTException | |
| 242 * @see IllegalArgumentException | |
| 243 */ | |
| 244 public static void error (int code, int hresult) { | |
| 245 switch (code) { | |
| 246 /* OS Failure/Limit (fatal, may occur only on some platforms) */ | |
| 247 case DND.ERROR_CANNOT_INIT_DRAG:{ | |
| 238 | 248 String msg = DND.INIT_DRAG_MESSAGE; |
| 249 if (hresult !is 0) msg ~= " result = "~to!(String)(hresult); //$NON-NLS-1$ | |
| 92 | 250 throw new DWTError (code, msg); |
| 251 } | |
| 252 case DND.ERROR_CANNOT_INIT_DROP:{ | |
| 238 | 253 String msg = DND.INIT_DROP_MESSAGE; |
| 254 if (hresult !is 0) msg ~= " result = "~to!(String)(hresult); //$NON-NLS-1$ | |
| 92 | 255 throw new DWTError (code, msg); |
| 256 } | |
| 257 case DND.ERROR_CANNOT_SET_CLIPBOARD:{ | |
| 238 | 258 String msg = DND.CANNOT_SET_CLIPBOARD_MESSAGE; |
| 259 if (hresult !is 0) msg ~= " result = "~to!(String)(hresult); //$NON-NLS-1$ | |
| 92 | 260 throw new DWTError (code, msg); |
| 261 } | |
| 262 case DND.ERROR_INVALID_DATA:{ | |
| 238 | 263 String msg = DND.INVALID_DATA_MESSAGE; |
| 264 if (hresult !is 0) msg ~= " result = "~to!(String)(hresult); //$NON-NLS-1$ | |
| 92 | 265 throw new DWTException (code, msg); |
| 266 } | |
|
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52b32f5cb1e0
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Frank Benoit <benoit@tionex.de>
parents:
108
diff
changeset
|
267 default: |
| 92 | 268 } |
| 269 | |
| 270 /* Unknown/Undefined Error */ | |
| 271 DWT.error(code); | |
| 272 } | |
| 273 | |
| 274 } |