Java Code Examples for org.eclipse.swt.SWT#BACKGROUND

private void setUpDrawing(Composite parent) {
	paintCanvas = new Canvas(parent, SWT.BACKGROUND);
	preview = new ChartPreview();
	paintCanvas.addPaintListener(preview);
	paintCanvas.addControlListener(preview);
	preview.setPreview(paintCanvas);
	preview.setDataPresent(false);
	preview.setTextToShow(noDataToDisplay);
}
 

@Override
public void handleEvent(Event event) {
    TableItem item = (TableItem) event.item;
    List<?> styleRanges = (List<?>) item.getData(Key.STYLE_RANGES);

    GC gc = event.gc;
    Color background = item.getBackground(event.index);
    /*
     * Paint the background if it is not the default system color. In
     * Windows, if you let the widget draw the background, it will not
     * show the item's background color if the item is selected or hot.
     * If there are no style ranges and the item background is the
     * default system color, we do not want to paint it or otherwise we
     * would override the platform theme (e.g. alternating colors).
     */
    if (styleRanges != null || !background.equals(item.getParent().getBackground())) {
        // we will paint the table item's background
        event.detail &= ~SWT.BACKGROUND;

        // paint the item's default background
        gc.setBackground(background);
        gc.fillRectangle(event.x, event.y, event.width, event.height);
    }

    /*
     * We will paint the table item's foreground. In Windows, if you
     * paint the background but let the widget draw the foreground, it
     * will override your background, unless the item is selected or
     * hot.
     */
    event.detail &= ~SWT.FOREGROUND;

    // paint the highlighted background for all style ranges
    if (styleRanges != null) {
        Rectangle textBounds = item.getTextBounds(event.index);
        String text = item.getText(event.index);
        for (Object o : styleRanges) {
            if (o instanceof StyleRange) {
                StyleRange styleRange = (StyleRange) o;
                if (styleRange.data.equals(event.index)) {
                    int startIndex = styleRange.start;
                    int endIndex = startIndex + styleRange.length;
                    int startX = gc.textExtent(text.substring(0, startIndex)).x;
                    int endX = gc.textExtent(text.substring(0, endIndex)).x;
                    gc.setBackground(styleRange.background);
                    gc.fillRectangle(textBounds.x + startX, textBounds.y, (endX - startX), textBounds.height);
                }
            }
        }
    }
}
 

protected void addSelectionColorOverride()
{
	if (controlIsDisposed())
	{
		return;
	}
	// Override selection color to match what is set in theme
	selectionOverride = new Listener()
	{
		public void handleEvent(Event event)
		{
			if (!invasiveThemesEnabled())
			{
				return;
			}
			GC gc = event.gc;
			Color oldBackground = gc.getBackground();
			if ((event.detail & SWT.SELECTED) != 0)
			{
				Scrollable scrollable = (Scrollable) event.widget;
				Rectangle clientArea = scrollable.getClientArea();

				gc.setBackground(getSelection());
				// The +2 on width is for Linux, since clientArea begins at [-2,-2] and
				// without it we don't properly color full width (see broken coloring when scrolling horizontally)
				gc.fillRectangle(clientArea.x, event.y, clientArea.width + 2, event.height);

				event.detail &= ~SWT.SELECTED;
				event.detail &= ~SWT.BACKGROUND;

				gc.setBackground(oldBackground);
			}
			else
			{
				// Draw normal background color. This seems to only be necessary for some variants of Linux,
				// and is the correct way to force custom painting of background when setBackground() doesn't work
				// properly.
				if (!isWindows && !isMacOSX)
				{
					Color controlBG = control.getBackground();
					if (controlBG.getRGB().equals(oldBackground.getRGB()))
					{
						gc.setBackground(getBackground());
						gc.fillRectangle(event.x, event.y, event.width, event.height);
						event.detail &= ~SWT.BACKGROUND;
						gc.setBackground(oldBackground);
					}
				}
			}

			// force foreground color. Otherwise on dark themes we get black FG (all the time on Win, on
			// non-focus for Mac)
			gc.setForeground(getForeground());
		}
	};
	getControl().addListener(SWT.EraseItem, selectionOverride);
}
 

private void addCustomTreeControlDrawing()
{
	// Hack to overdraw the native tree expand/collapse controls and use custom plus/minus box.
	if (isMacOSX || isUbuntu || controlIsDisposed())
	{
		return;
	}

	// FIXME The native control/arrow still shows through on OpenSuSE 11.4
	final Tree tree = getTree();
	customDrawingListener = new Listener()
	{
		public void handleEvent(Event event)
		{
			if (!invasiveThemesEnabled())
			{
				return;
			}
			GC gc = event.gc;
			Widget item = event.item;
			boolean isExpanded = false;
			boolean draw = false;
			if (item instanceof TreeItem)
			{
				TreeItem tItem = (TreeItem) item;
				isExpanded = tItem.getExpanded();
				draw = tItem.getItemCount() > 0;
			}
			if (!draw)
			{
				return;
			}
			final int width = 10;
			final int height = 12;
			final int x = event.x - 16;
			final int y = event.y + 4;
			Color oldBackground = gc.getBackground();
			gc.setBackground(getBackground());
			// wipe out the native control
			gc.fillRectangle(x, y, width + 1, height - 1); // +1 and -1 because of hovering selecting on windows
			// vista
			// draw a plus/minus based on expansion!
			gc.setBackground(getForeground());
			// draw surrounding box (with alpha so that it doesn't get too strong).
			gc.setAlpha(195);
			gc.drawRectangle(x + 1, y + 1, width - 2, width - 2); // make it smaller than the area erased
			gc.setAlpha(255);
			// draw '-'
			int halfWidth = width >> 1;
			gc.drawLine(x + 3, y + halfWidth, x + 7, y + halfWidth);
			if (!isExpanded)
			{
				// draw '|' to make it a plus
				gc.drawLine(x + halfWidth, y + 3, x + halfWidth, y + 7);
			}
			gc.setBackground(oldBackground);

			event.detail &= ~SWT.BACKGROUND;
		}
	};
	tree.addListener(SWT.PaintItem, customDrawingListener);
}
 

public Composite getComposite( Composite parent, ImportRuleInterface importRule ) {
  PropsUI props = PropsUI.getInstance();

  composite = new Composite( parent, SWT.BACKGROUND );
  props.setLook( composite );

  FormLayout formLayout = new FormLayout();
  formLayout.marginWidth = Const.FORM_MARGIN;
  formLayout.marginHeight = Const.FORM_MARGIN;
  composite.setLayout( formLayout );

  // Schema input field...
  //
  Label schemaLabel = new Label( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( schemaLabel );
  schemaLabel.setText( "Schema " );
  FormData fdSchemaLabel = new FormData();
  fdSchemaLabel.left = new FormAttachment( 0, 0 );
  fdSchemaLabel.top = new FormAttachment( 0, 0 );
  schemaLabel.setLayoutData( fdSchemaLabel );

  schemaText = new Text( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( schemaText );
  FormData fdSchemaText = new FormData();
  fdSchemaText.left = new FormAttachment( schemaLabel, Const.MARGIN );
  fdSchemaText.top = new FormAttachment( 0, 0 );
  fdSchemaText.right = new FormAttachment( schemaLabel, 150 );
  schemaText.setLayoutData( fdSchemaText );

  // Table name input field...
  //
  Label tableLabel = new Label( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( tableLabel );
  tableLabel.setText( "Table " );
  FormData fdTableLabel = new FormData();
  fdTableLabel.left = new FormAttachment( schemaText, Const.MARGIN );
  fdTableLabel.top = new FormAttachment( 0, 0 );
  tableLabel.setLayoutData( fdTableLabel );

  tableText = new Text( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( tableText );
  FormData fdTableText = new FormData();
  fdTableText.left = new FormAttachment( tableLabel, Const.MARGIN );
  fdTableText.top = new FormAttachment( 0, 0 );
  fdTableText.right = new FormAttachment( tableLabel, 150 );
  tableText.setLayoutData( fdTableText );

  // Connection name input field...
  //
  Label connectionLabel = new Label( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( connectionLabel );
  connectionLabel.setText( "Connection " );
  FormData fdConnectionLabel = new FormData();
  fdConnectionLabel.left = new FormAttachment( tableText, Const.MARGIN );
  fdConnectionLabel.top = new FormAttachment( 0, 0 );
  connectionLabel.setLayoutData( fdConnectionLabel );

  connectionText = new Text( composite, SWT.SINGLE | SWT.BORDER | SWT.LEFT );
  props.setLook( connectionText );
  FormData fdConnectionText = new FormData();
  fdConnectionText.left = new FormAttachment( connectionLabel, Const.MARGIN );
  fdConnectionText.top = new FormAttachment( 0, 0 );
  fdConnectionText.right = new FormAttachment( connectionLabel, 200 );
  connectionText.setLayoutData( fdConnectionText );

  return composite;
}