org.eclipse.swt.custom.LineBackgroundEvent Java Examples

/**
 * Return the correct background highlight for the kill ring entry line offset
 * 
 * @see org.eclipse.swt.custom.LineBackgroundListener#lineGetBackground(org.eclipse.swt.custom.LineBackgroundEvent)
 */
public void lineGetBackground(LineBackgroundEvent event) {
	KilledText kt = offsetHash.get(event.lineOffset);
	if (kt == null) {
		for (KilledText k : ringEntries) {
			if (event.lineOffset >= k.begin && event.lineOffset <= k.end) {
				offsetHash.put(event.lineOffset, k);
				kt = k;
				break;
			}
		}
	}
	if (kt != null) {
		event.lineBackground = kt.color;
	}
}
 

@Override
public void lineGetBackground(LineBackgroundEvent event) {
    if (event.lineOffset >= markedOffset && event.lineOffset < markedOffset + markedLength) {
        event.lineBackground = new Color(event.display, 255,255,128);
    } else {
        event.lineBackground = null;
    }
}
 

@Override
public void lineGetBackground(LineBackgroundEvent event) {
	if (!btnRadioSelected.getSelection())
		return;
	if (isOverlappingOriginalSelectionLineOffsetRange(event.lineOffset, event.lineText.length()))
		event.lineBackground = originalSelectionHighlightColor;
}
 

public void lineGetBackground(LineBackgroundEvent event) {
	boolean go = false;

	for( int i : customLines)
		if( i == txt.getLineAtOffset(event.lineOffset) )
		{
			go = true;
			break;
		}

	if( go ){
		event.lineBackground = customColor;
	}
}
 

public void lineGetBackground(LineBackgroundEvent event)
{
	if (fViewer == null)
	{
		return;
	}
	final StyledText textWidget = fViewer.getTextWidget();
	if (textWidget == null)
	{
		return;
	}

	try
	{
		final int offset = event.lineOffset;
		IDocument document = fViewer.getDocument();
		int line = document.getLineOfOffset(offset);
		final IRegion lineRegion = document.getLineInformation(line);

		// Handle fully opaque line highlight here. A modified approach from CursorLinePainter.
		if (fEnabled && isOpaque() && isCurrentLine(line))
		{
			// draw current line
			drawCurrentLine(event, lineRegion);
			return;
		}

		// Not drawing an opaque line highlight, so we need to do our normal line coloring here.
		// This extends the bg color out for a given line based on it's end scope.
		String endOfLineScope = getScopeManager().getScopeAtOffset(document, lineRegion.getLength() + offset);
		String commonPrefix = getScope(document, line, endOfLineScope);
		TextAttribute at = getCurrentTheme().getTextAttribute(commonPrefix);

		// if we have no color we need to extend to end of line, but this used to be the highlight line, force the
		// theme bg color
		if (at.getBackground() == null && isOpaque() && fLastLine.includes(offset))
		{
			event.lineBackground = getColorManager().getColor(getCurrentTheme().getBackground());
		}
		else
		{
			event.lineBackground = at.getBackground();
		}
	}
	catch (BadLocationException e)
	{
		IdeLog.logError(CommonEditorPlugin.getDefault(), e);
	}
}
 

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);
	}
}
 

public void lineGetBackground(LineBackgroundEvent event) {
    viewer.lineGetBackground(event);
}