Examples with DisposeListener org.eclipse.swt.events.DisposeListener used on opensource projects

Example 46 with DisposeListener

use of org.eclipse.swt.events.DisposeListener in project eclipse.platform.text by eclipse.

the class OverviewRuler method createControl.

@Override
public Control createControl(Composite parent, ITextViewer textViewer) {
    fTextViewer = textViewer;
    fHitDetectionCursor = parent.getDisplay().getSystemCursor(SWT.CURSOR_HAND);
    fHeader = new Canvas(parent, SWT.NONE);
    if (fAnnotationAccess instanceof IAnnotationAccessExtension) {
        fHeader.addMouseTrackListener(new MouseTrackAdapter() {

            /*
				 * @see org.eclipse.swt.events.MouseTrackAdapter#mouseHover(org.eclipse.swt.events.MouseEvent)
				 * @since 3.3
				 */
            @Override
            public void mouseEnter(MouseEvent e) {
                updateHeaderToolTipText();
            }
        });
    }
    fCanvas = new Canvas(parent, SWT.NO_BACKGROUND);
    fCanvas.addPaintListener(new PaintListener() {

        @Override
        public void paintControl(PaintEvent event) {
            if (fTextViewer != null)
                doubleBufferPaint(event.gc);
        }
    });
    fCanvas.addDisposeListener(new DisposeListener() {

        @Override
        public void widgetDisposed(DisposeEvent event) {
            handleDispose();
            fTextViewer = null;
        }
    });
    fCanvas.addMouseListener(new MouseAdapter() {

        @Override
        public void mouseDown(MouseEvent event) {
            handleMouseDown(event);
        }
    });
    fCanvas.addMouseMoveListener(new MouseMoveListener() {

        @Override
        public void mouseMove(MouseEvent event) {
            handleMouseMove(event);
        }
    });
    fCanvas.addMouseWheelListener(new MouseWheelListener() {

        @Override
        public void mouseScrolled(MouseEvent e) {
            handleMouseScrolled(e);
        }
    });
    if (fTextViewer != null) {
        fTextViewer.addTextListener(fInternalListener);
        // on word wrap toggle a "resized" ControlEvent is fired: suggest a redraw of the ruler
        fTextViewer.getTextWidget().addControlListener(new ControlAdapter() {

            @Override
            public void controlResized(ControlEvent e) {
                if (fTextViewer == null) {
                    return;
                }
                StyledText textWidget = fTextViewer.getTextWidget();
                if (textWidget != null && textWidget.getWordWrap()) {
                    redraw();
                }
            }
        });
    }
    return fCanvas;
}

Example 47 with DisposeListener

use of org.eclipse.swt.events.DisposeListener in project eclipse.platform.text by eclipse.

the class DefaultRangeIndicator method getImage.

/**
 * Returns the image of this range indicator.
 *
 * @param control the control
 * @param rangeIndicatorColor the color to be used to paint the range indicator
 * @return an image
 */
private Image getImage(Control control, Color rangeIndicatorColor) {
    if (fImage == null) {
        fImage = createImage(control.getDisplay(), control.getSize(), rangeIndicatorColor);
        control.addDisposeListener(new DisposeListener() {

            @Override
            public void widgetDisposed(DisposeEvent e) {
                if (fImage != null && !fImage.isDisposed()) {
                    fImage.dispose();
                    fImage = null;
                }
            }
        });
    } else {
        Rectangle imageRectangle = fImage.getBounds();
        Point controlSize = control.getSize();
        if (imageRectangle.width < controlSize.x || imageRectangle.height < controlSize.y || !rangeIndicatorColor.equals(fLastRangeIndicatorColor)) {
            fImage.dispose();
            fImage = createImage(control.getDisplay(), controlSize, rangeIndicatorColor);
        }
    }
    return fImage;
}

Example 48 with DisposeListener

use of org.eclipse.swt.events.DisposeListener in project eclipse.platform.text by eclipse.

the class TextViewer method createControl.

/**
 * Creates the viewer's SWT control. The viewer's text widget either is
 * the control or is a child of the control.
 *
 * @param parent the parent of the viewer's control
 * @param styles the SWT style bits for the viewer's control
 */
protected void createControl(Composite parent, int styles) {
    fTextWidget = createTextWidget(parent, styles);
    // Support scroll page upon MOD1+MouseWheel
    fTextWidget.addListener(SWT.MouseVerticalWheel, new Listener() {

        @Override
        public void handleEvent(Event event) {
            if (((event.stateMask & SWT.MOD1) == 0))
                return;
            int topIndex = fTextWidget.getTopIndex();
            int bottomIndex = JFaceTextUtil.getBottomIndex(fTextWidget);
            if (event.count > 0)
                fTextWidget.setTopIndex(2 * topIndex - bottomIndex);
            else
                fTextWidget.setTopIndex(bottomIndex);
            updateViewportListeners(INTERNAL);
        }
    });
    fTextWidget.addDisposeListener(new DisposeListener() {

        @Override
        public void widgetDisposed(DisposeEvent e) {
            fDisposedControl = getControl();
            handleDispose();
        }
    });
    fTextWidget.setFont(parent.getFont());
    fTextWidget.setDoubleClickEnabled(true);
    /*
		 * Disable SWT Shift+TAB traversal in this viewer
		 * 1GIYQ9K: ITPUI:WINNT - StyledText swallows Shift+TAB
		 */
    fTextWidget.addTraverseListener(new TraverseListener() {

        @Override
        public void keyTraversed(TraverseEvent e) {
            if ((SWT.SHIFT == e.stateMask) && ('\t' == e.character))
                e.doit = !fTextWidget.getEditable();
        }
    });
    // where does the first line start
    fTopInset = -fTextWidget.computeTrim(0, 0, 0, 0).y;
    fVerifyListener.forward(true);
    fTextWidget.addVerifyListener(fVerifyListener);
    fTextWidget.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent event) {
            selectionChanged(event.x, event.y - event.x);
        }

        @Override
        public void widgetSelected(SelectionEvent event) {
            selectionChanged(event.x, event.y - event.x);
        }
    });
    fCursorListener = new CursorListener();
    fCursorListener.install();
    initializeViewportUpdate();
}

Example 49 with DisposeListener

use of org.eclipse.swt.events.DisposeListener in project eclipse.platform.text by eclipse.

the class RevisionPainter method connectIfNeeded.

/**
 * Ensures that the column is fully instantiated, i.e. has a control, and that the viewer is
 * visible.
 */
private void connectIfNeeded() {
    if (isConnected() || fParentRuler == null)
        return;
    fViewer = fParentRuler.getTextViewer();
    if (fViewer == null)
        return;
    fWidget = fViewer.getTextWidget();
    if (fWidget == null)
        return;
    fControl = fColumn.getControl();
    if (fControl == null)
        return;
    fControl.addMouseTrackListener(fMouseHandler);
    fControl.addMouseMoveListener(fMouseHandler);
    fControl.addListener(SWT.MouseUp, fMouseHandler);
    fControl.addListener(SWT.MouseDown, fMouseHandler);
    fControl.addDisposeListener(new DisposeListener() {

        @Override
        public void widgetDisposed(DisposeEvent e) {
            handleDispose();
        }
    });
    fRevisionSelectionProvider.install(fViewer);
}

Example 50 with DisposeListener

use of org.eclipse.swt.events.DisposeListener in project eclipse.platform.text by eclipse.

the class DiffPainter method connectIfNeeded.

/**
 * Ensures that the column is fully instantiated, i.e. has a control, and that the viewer is
 * visible.
 */
private void connectIfNeeded() {
    if (isConnected() || fParentRuler == null)
        return;
    fViewer = fParentRuler.getTextViewer();
    if (fViewer == null)
        return;
    fWidget = fViewer.getTextWidget();
    if (fWidget == null)
        return;
    fControl = fColumn.getControl();
    if (fControl == null)
        return;
    fControl.addDisposeListener(new DisposeListener() {

        @Override
        public void widgetDisposed(DisposeEvent e) {
            handleDispose();
        }
    });
}