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comparison dwtx/jface/text/source/OverviewRulerHoverManager.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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128:8df1d4193877 129:eb30df5ca28b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2008 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
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.jface.text.source.OverviewRulerHoverManager;
14
15 import dwt.dwthelper.utils;
16
17
18
19 import dwt.custom.StyledText;
20 import dwt.graphics.Point;
21 import dwt.graphics.Rectangle;
22 import dwt.widgets.ScrollBar;
23 import dwtx.jface.text.IInformationControlCreator;
24
25 /**
26 * This manager controls the layout, content, and visibility of an information
27 * control in reaction to mouse hover events issued by the overview ruler of a
28 * source viewer.
29 *
30 * @since 2.1
31 */
32 class OverviewRulerHoverManager : AnnotationBarHoverManager {
33
34 /**
35 * Creates an overview hover manager with the given parameters. In addition,
36 * the hovers anchor is RIGHT and the margin is 5 points to the right.
37 *
38 * @param ruler the overview ruler this manager connects to
39 * @param sourceViewer the source viewer this manager connects to
40 * @param annotationHover the annotation hover providing the information to be displayed
41 * @param creator the information control creator
42 */
43 public OverviewRulerHoverManager(IOverviewRuler ruler, ISourceViewer sourceViewer, IAnnotationHover annotationHover, IInformationControlCreator creator) {
44 super(ruler, sourceViewer, annotationHover, creator);
45 setAnchor(ANCHOR_LEFT);
46 StyledText textWidget= sourceViewer.getTextWidget();
47 if (textWidget !is null) {
48 ScrollBar verticalBar= textWidget.getVerticalBar();
49 if (verticalBar !is null)
50 setMargins(verticalBar.getSize().x, 5);
51 }
52 }
53
54 /*
55 * @see AbstractHoverInformationControlManager#computeInformation()
56 */
57 protected void computeInformation() {
58 Point location= getHoverEventLocation();
59 int line= getVerticalRulerInfo().toDocumentLineNumber(location.y);
60 IAnnotationHover hover= getAnnotationHover();
61
62 IInformationControlCreator controlCreator= null;
63 if (hover instanceof IAnnotationHoverExtension)
64 controlCreator= ((IAnnotationHoverExtension)hover).getHoverControlCreator();
65 setCustomInformationControlCreator(controlCreator);
66
67 setInformation(hover.getHoverInfo(getSourceViewer(), line), computeArea(location.y));
68 }
69
70 /**
71 * Determines graphical area covered for which the hover is valid.
72 *
73 * @param y y-coordinate in the vertical ruler
74 * @return the graphical extend where the hover is valid
75 */
76 private Rectangle computeArea(int y) {
77 // This is OK (see constructor)
78 IOverviewRuler overviewRuler= (IOverviewRuler) getVerticalRulerInfo();
79
80 int hover_height= overviewRuler.getAnnotationHeight();
81 int hover_width= getVerticalRulerInfo().getControl().getSize().x;
82
83 // Calculate y-coordinate for hover
84 int hover_y= y;
85 bool hasAnnotation= true;
86 while (hasAnnotation && hover_y > y - hover_height) {
87 hover_y--;
88 hasAnnotation= overviewRuler.hasAnnotation(hover_y);
89 }
90 hover_y++;
91
92 return new Rectangle(0, hover_y, hover_width, hover_height);
93 }
94 }