| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.draw2d; |
| |
| import org.eclipse.draw2d.geometry.Rectangle; |
| import org.eclipse.draw2d.geometry.Translatable; |
| |
| /** |
| * @author hudsonr |
| * @since 2.1 |
| */ |
| public class ScalableFreeformLayeredPane extends FreeformLayeredPane implements |
| ScalableFigure { |
| |
| private double scale = 1.0; |
| |
| /** |
| * @see org.eclipse.draw2d.Figure#getClientArea() |
| */ |
| public Rectangle getClientArea(Rectangle rect) { |
| super.getClientArea(rect); |
| rect.width /= scale; |
| rect.height /= scale; |
| rect.x /= scale; |
| rect.y /= scale; |
| return rect; |
| } |
| |
| /** |
| * Returns the current zoom scale level. |
| * |
| * @return the scale |
| */ |
| public double getScale() { |
| return scale; |
| } |
| |
| /** |
| * @see org.eclipse.draw2d.IFigure#isCoordinateSystem() |
| */ |
| public boolean isCoordinateSystem() { |
| return true; |
| } |
| |
| /** |
| * @see org.eclipse.draw2d.Figure#paintClientArea(Graphics) |
| */ |
| protected void paintClientArea(Graphics graphics) { |
| if (getChildren().isEmpty()) |
| return; |
| if (scale == 1.0) { |
| super.paintClientArea(graphics); |
| } else { |
| ScaledGraphics g = new ScaledGraphics(graphics); |
| boolean optimizeClip = getBorder() == null |
| || getBorder().isOpaque(); |
| if (!optimizeClip) |
| g.clipRect(getBounds().getCropped(getInsets())); |
| g.scale(scale); |
| g.pushState(); |
| paintChildren(g); |
| g.dispose(); |
| graphics.restoreState(); |
| } |
| } |
| |
| /** |
| * Sets the zoom level |
| * |
| * @param newZoom |
| * The new zoom level |
| */ |
| public void setScale(double newZoom) { |
| if (scale == newZoom) |
| return; |
| scale = newZoom; |
| superFireMoved(); // For AncestorListener compatibility |
| getFreeformHelper().invalidate(); |
| repaint(); |
| } |
| |
| /** |
| * @see org.eclipse.draw2d.Figure#translateToParent(Translatable) |
| */ |
| public void translateToParent(Translatable t) { |
| t.performScale(scale); |
| } |
| |
| /** |
| * @see org.eclipse.draw2d.Figure#translateFromParent(Translatable) |
| */ |
| public void translateFromParent(Translatable t) { |
| t.performScale(1 / scale); |
| } |
| |
| /** |
| * @see org.eclipse.draw2d.Figure#useLocalCoordinates() |
| */ |
| protected final boolean useLocalCoordinates() { |
| return false; |
| } |
| |
| } |