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