Java Code Examples for org.eclipse.swt.custom.StyledText#getBackground()

@Override
protected void doubleBufferPaint(GC dest) {
    if (fTextViewer != null) {
        StyledText textWidget = fTextViewer.getTextWidget();
        //Calling setBackground/setForeground leads to a repaint on some Linux variants (ubuntu 12), so
        //we must only call it if it actually changed to prevent a repaint.
        //View: https://www.brainwy.com/tracker/LiClipse/120
        Color background = textWidget.getBackground();
        if (lastBackground == null || !lastBackground.equals(background)) {
            fCanvas.setBackground(background);
            lastBackground = background;
        }

        Color foreground = textWidget.getForeground();
        if (lastForeground == null || !lastForeground.equals(foreground)) {
            fCanvas.setForeground(foreground);
            lastForeground = foreground;
        }

    }
    super.doubleBufferPaint(dest);
}
 

@SuppressWarnings("unchecked")
private void overrideRulerColors()
{
	IThemeableEditor editor = this.fEditor.get();

	// default to bg color of surrounding composite
	Color bg = null;
	// Use editor background color if we can
	if (editor != null)
	{
		ISourceViewer sv = editor.getISourceViewer();
		if (sv != null)
		{
			StyledText text = sv.getTextWidget();
			if (text != null)
			{
				bg = text.getBackground();
				// copy the color because for some reason it gets disposed
				bg = ThemePlugin.getDefault().getColorManager().getColor(bg.getRGB());
			}
		}

		// force the colors for all the ruler columns (specifically so we force the folding bg to match).
		CompositeRuler ruler = (CompositeRuler) editor.getIVerticalRuler();
		Iterator<IVerticalRulerColumn> iter = ruler.getDecoratorIterator();
		while (iter.hasNext())
		{
			IVerticalRulerColumn column = iter.next();
			column.getControl().setBackground(bg);
		}
	}

	if (fLineColumn != null)
	{
		fLineColumn.setBackground(bg);
	}
}
 

private void drawCurrentLine(LineBackgroundEvent event, final IRegion lineRegion)
{
	final StyledText textWidget = fViewer.getTextWidget();
	final int offset = event.lineOffset;
	final RGBa lineHighlight = getCurrentTheme().getLineHighlight();
	event.lineBackground = getColorManager().getColor(lineHighlight.toRGB());

	// In this case, we should be overriding the bg of the style ranges for the line too!
	if (textWidget.isDisposed())
	{
		return;
	}
	// FIXME Only change bg colors of visible ranges!
	int replaceLength = 160;
	if (lineRegion != null)
	{
		replaceLength = Math.min(replaceLength, lineRegion.getLength());
	}

	// be safe about offsets
	int charCount = textWidget.getCharCount();
	if (offset + replaceLength > charCount)
	{
		replaceLength = charCount - offset;
		if (replaceLength < 0)
		{
			// Just playing safe here
			replaceLength = 0;
		}
	}
	final StyleRange[] ranges = textWidget.getStyleRanges(offset, replaceLength, true);
	if (ranges == null || ranges.length == 0)
	{
		return;
	}
	Color background = textWidget.getBackground();
	final int[] positions = new int[ranges.length << 1];
	int x = 0;
	boolean apply = false;
	for (StyleRange range : ranges)
	{
		if (range.background != null)
		{
			if (!range.background.equals(background))
			{
				positions[x] = range.start;
				positions[x + 1] = range.length;
				x += 2;
				continue;
			}
			apply = true;
		}
		range.background = null;
		positions[x] = range.start;
		positions[x + 1] = range.length;
		x += 2;
	}

	if (apply)
	{
		textWidget.setStyleRanges(offset, replaceLength, positions, ranges);
	}
}
 

@Override
public void configure(SourceViewerConfiguration configuration) {

	/*
	 * Prevent access to colors disposed in unconfigure(), see:
	 *   https://bugs.eclipse.org/bugs/show_bug.cgi?id=53641
	 *   https://bugs.eclipse.org/bugs/show_bug.cgi?id=86177
	 */
	StyledText textWidget= getTextWidget();
	if (textWidget != null && !textWidget.isDisposed()) {
		Color foregroundColor= textWidget.getForeground();
		if (foregroundColor != null && foregroundColor.isDisposed())
			textWidget.setForeground(null);
		Color backgroundColor= textWidget.getBackground();
		if (backgroundColor != null && backgroundColor.isDisposed())
			textWidget.setBackground(null);
	}

	super.configure(configuration);
	if (configuration instanceof JavaSourceViewerConfiguration) {
		JavaSourceViewerConfiguration javaSVCconfiguration= (JavaSourceViewerConfiguration)configuration;
		fOutlinePresenter= javaSVCconfiguration.getOutlinePresenter(this, false);
		if (fOutlinePresenter != null)
			fOutlinePresenter.install(this);

		fStructurePresenter= javaSVCconfiguration.getOutlinePresenter(this, true);
		if (fStructurePresenter != null)
			fStructurePresenter.install(this);

		fHierarchyPresenter= javaSVCconfiguration.getHierarchyPresenter(this, true);
		if (fHierarchyPresenter != null)
			fHierarchyPresenter.install(this);

	}

	if (fPreferenceStore != null) {
		fPreferenceStore.addPropertyChangeListener(this);
		initializeViewerColors();
	}

	fIsConfigured= true;
}
 

private void getColors(StyledText widget) {
	background = widget.getBackground();
	if (background != null) {
		flash = Flasher.invertColor(background);
	}
}