| /******************************************************************************* |
| * <copyright> |
| * |
| * Copyright (c) 2005, 2012 SAP AG. |
| * 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: |
| * SAP AG - initial API, implementation and documentation |
| * |
| * </copyright> |
| * |
| *******************************************************************************/ |
| package org.eclipse.graphiti.ui.internal.util.draw2d; |
| |
| import org.eclipse.draw2d.IFigure; |
| import org.eclipse.draw2d.Locator; |
| import org.eclipse.draw2d.PositionConstants; |
| import org.eclipse.draw2d.RelativeLocator; |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| import org.eclipse.gef.handles.HandleBounds; |
| import org.eclipse.graphiti.ui.platform.IConfigurationProvider; |
| |
| /** |
| * A Locator, which sets the target bounds depending on the reference figure |
| * bounds according to the following rules: |
| * <ul> |
| * <li>The handle-insets are used to expand/shrink the reference figure bounds, |
| * at the beginning of the calculation. They are adjusted with the current |
| * zoom-level.</li> |
| * <li>The location can be one of the north-south-east-west constants in |
| * {@link PositionConstants}. It describes the side/corner of the reference |
| * figure bounds at which the target is located.</li> |
| * <li>The handle-dimension defines the dimension of the target bounds. They are |
| * adjusted with the current zoom-level.</li> |
| * </ul> |
| * |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ZoomingRelativeHandleLocator extends RelativeLocator implements Locator { |
| |
| private IFigure reference; |
| private IConfigurationProvider configurationProvider; |
| private Dimension handleDimension; |
| |
| /** |
| * Creates a new ZoomingInsetsHandleLocator. |
| * |
| * @param reference |
| * The target bounds are calculated depending on this reference |
| * figure. |
| * @param configurationProvider |
| * The configuration provider which can be used to access the |
| * environment. |
| * @param location |
| * The location can be one of the north-south-east-west constants |
| * in {@link PositionConstants}. |
| * @param handleDimension |
| * The dimension of the target bounds. |
| * @param handleInsets |
| * The insets to apply to the reference figure bounds. |
| */ |
| public ZoomingRelativeHandleLocator(IFigure reference, IConfigurationProvider configurationProvider, int location, |
| Dimension handleDimension, Dimension handleInsets) { |
| this(reference, location, handleInsets); |
| this.configurationProvider = configurationProvider; |
| this.handleDimension = handleDimension; |
| } |
| |
| /** |
| * Sets the relative and absolute x/y coordinates depending on the location. |
| */ |
| private ZoomingRelativeHandleLocator(IFigure reference, int location, Dimension handleInsets) { |
| super(reference, location); |
| this.reference = reference; |
| switch (location & PositionConstants.NORTH_SOUTH) { |
| case PositionConstants.NORTH: |
| break; |
| case PositionConstants.SOUTH: |
| break; |
| default: |
| } |
| |
| switch (location & PositionConstants.EAST_WEST) { |
| case PositionConstants.WEST: |
| break; |
| case PositionConstants.EAST: |
| break; |
| default: |
| } |
| } |
| |
| /** |
| * Returns the reference figure bounds adjusted by the insets. |
| * |
| * @return The reference figure bounds adjusted by the insets. |
| */ |
| protected Rectangle getReferenceBox() { |
| Rectangle result; |
| if (reference instanceof HandleBounds) |
| result = ((HandleBounds) reference).getHandleBounds(); |
| else |
| result = reference.getBounds(); |
| return result; |
| } |
| |
| /** |
| * Sets the bounds of the target figure as described above. |
| * |
| * @param target |
| * The target figure for which to set the bounds. |
| */ |
| public void relocate(IFigure target) { |
| double zoom = GFHandleHelper.getZoomLevel(configurationProvider); |
| Dimension zoomedTargetDimension = handleDimension.getCopy(); |
| if (zoom != 1.0) { |
| zoomedTargetDimension = handleDimension.getCopy().scale(zoom); |
| } |
| |
| Dimension preferredSize = target.getPreferredSize(); |
| preferredSize.width = zoomedTargetDimension.width; |
| preferredSize.height = zoomedTargetDimension.height; |
| target.setPreferredSize(preferredSize); |
| |
| super.relocate(target); |
| } |
| } |