projects/dwt-linux: dwt/custom/StyledTextDropTargetEffect.d annotate

annotate dwt/custom/StyledTextDropTargetEffect.d @ 240:ce446666f5a2

Update to SWT 3.4M7

author	Frank Benoit <benoit@tionex.de>
date	Mon, 12 May 2008 19:13:01 +0200
parents	08789b28bdf3
children	c0d810de7093

rev	line source
150 f2e04420fd6c reworked overrides and superclass aliases Frank Benoit <benoit@tionex.de> parents: 108 diff changeset	1 /*******************************************************************************
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	2 * Copyright (c) 2000, 2007 IBM Corporation and others.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	3 * All rights reserved. This program and the accompanying materials
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	4 * are made available under the terms of the Eclipse Public License v1.0
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	5 * which accompanies this distribution, and is available at
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	6 * http://www.eclipse.org/legal/epl-v10.html
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	7 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	8 * Contributors:
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	9 * IBM Corporation - initial API and implementation
108 0f12f6bb9739 author notice Frank Benoit <benoit@tionex.de> parents: 103 diff changeset	10 * Port to the D programming language:
0f12f6bb9739 author notice Frank Benoit <benoit@tionex.de> parents: 103 diff changeset	11 * Frank Benoit <benoit@tionex.de>
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	12 *******************************************************************************/
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	13 module dwt.custom.StyledTextDropTargetEffect;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	14
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	15
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	16 import dwt.DWT;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	17 import dwt.dnd.DND;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	18 import dwt.dnd.DropTargetAdapter;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	19 import dwt.dnd.DropTargetEffect;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	20 import dwt.dnd.DropTargetEvent;
240 ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	21 import dwt.graphics.FontMetrics;
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	22 import dwt.graphics.GC;
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	23 import dwt.graphics.Point;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	24 import dwt.graphics.Rectangle;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	25 import dwt.widgets.Event;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	26 import dwt.widgets.Listener;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	27 import dwt.custom.StyledText;
103 0179b2e17eb2 Package custom compiles Frank Benoit <benoit@tionex.de> parents: 102 diff changeset	28 import dwt.custom.StyledTextContent;
0179b2e17eb2 Package custom compiles Frank Benoit <benoit@tionex.de> parents: 102 diff changeset	29
0179b2e17eb2 Package custom compiles Frank Benoit <benoit@tionex.de> parents: 102 diff changeset	30 static import tango.core.Exception;
200 08789b28bdf3 import dwt.dwthelper.utils now explicit Frank Benoit <benoit@tionex.de> parents: 150 diff changeset	31 import dwt.dwthelper.utils;
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	32
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	33 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	34 * This adapter class provides a default drag under effect (eg. select and scroll)
240 ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	35 * when a drag occurs over a <code>StyledText</code>.
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	36 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	37 * <p>Classes that wish to provide their own drag under effect for a <code>StyledText</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	38 * can extend this class, override the <code>StyledTextDropTargetEffect.dragOver</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	39 * method and override any other applicable methods in <code>StyledTextDropTargetEffect</code> to
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	40 * display their own drag under effect.</p>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	41 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	42 * Subclasses that override any methods of this class should call the corresponding
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	43 * <code>super</code> method to get the default drag under effect implementation.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	44 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	45 * <p>The feedback value is either one of the FEEDBACK constants defined in
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	46 * class <code>DND</code> which is applicable to instances of this class,
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	47 * or it must be built by <em>bitwise OR</em>'ing together
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	48 * (that is, using the <code>int</code> "\|" operator) two or more
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	49 * of those <code>DND</code> effect constants.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	50 * </p>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	51 * <p>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	52 * <dl>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	53 * <dt><b>Feedback:</b></dt>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	54 * <dd>FEEDBACK_SELECT, FEEDBACK_SCROLL</dd>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	55 * </dl>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	56 * </p>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	57 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	58 * @see DropTargetAdapter
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	59 * @see DropTargetEvent
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	60 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	61 * @since 3.3
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	62 */
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	63 public class StyledTextDropTargetEffect : DropTargetEffect {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	64 static final int CARET_WIDTH = 2;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	65 static final int SCROLL_HYSTERESIS = 100; // milli seconds
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	66 static final int SCROLL_TOLERANCE = 20; // pixels
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	67
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	68 int currentOffset = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	69 long scrollBeginTime;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	70 int scrollX = -1, scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	71 Listener paintListener;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	72
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	73 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	74 * Creates a new <code>StyledTextDropTargetEffect</code> to handle the drag under effect on the specified
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	75 * <code>StyledText</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	76 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	77 * @param styledText the <code>StyledText</code> over which the user positions the cursor to drop the data
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	78 */
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	79 public this(StyledText styledText) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	80 super(styledText);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	81 paintListener = new class() Listener {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	82 public void handleEvent (Event event) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	83 if (currentOffset !is -1) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	84 StyledText text = cast(StyledText) getControl();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	85 Point position = text.getLocationAtOffset(currentOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	86 int height = text.getLineHeight(currentOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	87 event.gc.setBackground(event.display.getSystemColor (DWT.COLOR_BLACK));
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	88 event.gc.fillRectangle(position.x, position.y, CARET_WIDTH, height);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	89 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	90 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	91 };
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	92 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	93
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	94 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	95 * This implementation of <code>dragEnter</code> provides a default drag under effect
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	96 * for the feedback specified in <code>event.feedback</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	97 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	98 * For additional information see <code>DropTargetAdapter.dragEnter</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	99 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	100 * Subclasses that override this method should call <code>super.dragEnter(event)</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	101 * to get the default drag under effect implementation.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	102 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	103 * @param event the information associated with the drag start event
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	104 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	105 * @see DropTargetAdapter
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	106 * @see DropTargetEvent
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	107 */
150 f2e04420fd6c reworked overrides and superclass aliases Frank Benoit <benoit@tionex.de> parents: 108 diff changeset	108 public override void dragEnter(DropTargetEvent event) {
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	109 currentOffset = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	110 scrollBeginTime = 0;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	111 scrollX = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	112 scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	113 getControl().removeListener(DWT.Paint, paintListener);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	114 getControl().addListener (DWT.Paint, paintListener);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	115 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	116
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	117 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	118 * This implementation of <code>dragLeave</code> provides a default drag under effect
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	119 * for the feedback specified in <code>event.feedback</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	120 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	121 * For additional information see <code>DropTargetAdapter.dragLeave</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	122 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	123 * Subclasses that override this method should call <code>super.dragLeave(event)</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	124 * to get the default drag under effect implementation.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	125 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	126 * @param event the information associated with the drag leave event
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	127 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	128 * @see DropTargetAdapter
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	129 * @see DropTargetEvent
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	130 */
150 f2e04420fd6c reworked overrides and superclass aliases Frank Benoit <benoit@tionex.de> parents: 108 diff changeset	131 public override void dragLeave(DropTargetEvent event) {
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	132 StyledText text = cast(StyledText) getControl();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	133 if (currentOffset !is -1) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	134 refreshCaret(text, currentOffset, -1);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	135 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	136 text.removeListener(DWT.Paint, paintListener);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	137 scrollBeginTime = 0;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	138 scrollX = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	139 scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	140 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	141
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	142 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	143 * This implementation of <code>dragOver</code> provides a default drag under effect
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	144 * for the feedback specified in <code>event.feedback</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	145 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	146 * For additional information see <code>DropTargetAdapter.dragOver</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	147 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	148 * Subclasses that override this method should call <code>super.dragOver(event)</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	149 * to get the default drag under effect implementation.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	150 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	151 * @param event the information associated with the drag over event
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	152 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	153 * @see DropTargetAdapter
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	154 * @see DropTargetEvent
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	155 * @see DND#FEEDBACK_SELECT
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	156 * @see DND#FEEDBACK_SCROLL
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	157 */
150 f2e04420fd6c reworked overrides and superclass aliases Frank Benoit <benoit@tionex.de> parents: 108 diff changeset	158 public override void dragOver(DropTargetEvent event) {
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	159 int effect = event.feedback;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	160 StyledText text = cast(StyledText) getControl();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	161
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	162 Point pt = text.getDisplay().map(null, text, event.x, event.y);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	163 if ((effect & DND.FEEDBACK_SCROLL) is 0) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	164 scrollBeginTime = 0;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	165 scrollX = scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	166 } else {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	167 if (text.getCharCount() is 0) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	168 scrollBeginTime = 0;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	169 scrollX = scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	170 } else {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	171 if (scrollX !is -1 && scrollY !is -1 && scrollBeginTime !is 0 &&
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	172 (pt.x >= scrollX && pt.x <= (scrollX + SCROLL_TOLERANCE) \|\|
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	173 pt.y >= scrollY && pt.y <= (scrollY + SCROLL_TOLERANCE))) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	174 if (System.currentTimeMillis() >= scrollBeginTime) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	175 Rectangle area = text.getClientArea();
240 ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	176 GC gc = new GC(text);
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	177 FontMetrics fm = gc.getFontMetrics();
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	178 gc.dispose();
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	179 int charWidth = fm.getAverageCharWidth();
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	180 int scrollAmount = 10*charWidth;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	181 if (pt.x < area.x + 3*charWidth) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	182 int leftPixel = text.getHorizontalPixel();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	183 text.setHorizontalPixel(leftPixel - scrollAmount);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	184 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	185 if (pt.x > area.width - 3*charWidth) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	186 int leftPixel = text.getHorizontalPixel();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	187 text.setHorizontalPixel(leftPixel + scrollAmount);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	188 }
240 ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	189 int lineHeight = text.getLineHeight();
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	190 if (pt.y < area.y + lineHeight) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	191 int topPixel = text.getTopPixel();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	192 text.setTopPixel(topPixel - lineHeight);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	193 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	194 if (pt.y > area.height - lineHeight) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	195 int topPixel = text.getTopPixel();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	196 text.setTopPixel(topPixel + lineHeight);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	197 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	198 scrollBeginTime = 0;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	199 scrollX = scrollY = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	200 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	201 } else {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	202 scrollBeginTime = System.currentTimeMillis() + SCROLL_HYSTERESIS;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	203 scrollX = pt.x;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	204 scrollY = pt.y;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	205 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	206 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	207 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	208
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	209 if ((effect & DND.FEEDBACK_SELECT) !is 0) {
240 ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	210 int[] trailing = new int [1];
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	211 int newOffset = text.getOffsetAtPoint(pt.x, pt.y, trailing, false);
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	212 newOffset += trailing [0];
ce446666f5a2 Update to SWT 3.4M7 Frank Benoit <benoit@tionex.de> parents: 200 diff changeset	213 if (newOffset !is currentOffset) {
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	214 refreshCaret(text, currentOffset, newOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	215 currentOffset = newOffset;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	216 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	217 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	218 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	219
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	220 void refreshCaret(StyledText text, int oldOffset, int newOffset) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	221 if (oldOffset !is newOffset) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	222 if (oldOffset !is -1) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	223 Point oldPos = text.getLocationAtOffset(oldOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	224 int oldHeight = text.getLineHeight(oldOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	225 text.redraw (oldPos.x, oldPos.y, CARET_WIDTH, oldHeight, false);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	226 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	227 if (newOffset !is -1) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	228 Point newPos = text.getLocationAtOffset(newOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	229 int newHeight = text.getLineHeight(newOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	230 text.redraw (newPos.x, newPos.y, CARET_WIDTH, newHeight, false);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	231 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	232 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	233 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	234
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	235 /**
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	236 * This implementation of <code>dropAccept</code> provides a default drag under effect
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	237 * for the feedback specified in <code>event.feedback</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	238 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	239 * For additional information see <code>DropTargetAdapter.dropAccept</code>.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	240 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	241 * Subclasses that override this method should call <code>super.dropAccept(event)</code>
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	242 * to get the default drag under effect implementation.
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	243 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	244 * @param event the information associated with the drop accept event
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	245 *
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	246 * @see DropTargetAdapter
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	247 * @see DropTargetEvent
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	248 */
150 f2e04420fd6c reworked overrides and superclass aliases Frank Benoit <benoit@tionex.de> parents: 108 diff changeset	249 public override void dropAccept(DropTargetEvent event) {
102 12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	250 if (currentOffset !is -1) {
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	251 StyledText text = cast(StyledText) getControl();
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	252 text.setSelection(currentOffset);
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	253 currentOffset = -1;
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	254 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	255 }
12e3e0e477cd package custom, module and imports ok Frank Benoit <benoit@tionex.de> parents: diff changeset	256 }

Mercurial > projects > dwt-linux

annotate dwt/custom/StyledTextDropTargetEffect.d @ 240:ce446666f5a2