Attachment 209892 Details for Bug 369357 – Example showing zooming not working properly when custom anchors used.

Example showing zooming not working properly when custom anchors used.

ZoomingGraphJFaceExample.java (text/plain), 6.15 KB, created by Erdal Karaca

on 2012-01-23 03:11:01 EST

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Filename:

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Creator: Erdal Karaca

Created: 2012-01-23 03:11:01 EST

Size: 6.15 KB

patch

obsolete

>/*******************************************************************************
> * Copyright (c) 2012 Erdal Karaca. 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
> * <p/>
> * Contributors: Erdal Karaca - initial implementation based on snippet 9
> *******************************************************************************/
>package org.eclipse.zest.examples.jface;
>
>import java.util.Arrays;
>
>import org.eclipse.draw2d.AbstractConnectionAnchor;
>import org.eclipse.draw2d.Connection;
>import org.eclipse.draw2d.IFigure;
>import org.eclipse.draw2d.RelativeBendpoint;
>import org.eclipse.draw2d.geometry.Dimension;
>import org.eclipse.draw2d.geometry.Point;
>import org.eclipse.draw2d.geometry.Rectangle;
>import org.eclipse.jface.action.MenuManager;
>import org.eclipse.jface.viewers.ISelectionChangedListener;
>import org.eclipse.jface.viewers.ITreeContentProvider;
>import org.eclipse.jface.viewers.LabelProvider;
>import org.eclipse.jface.viewers.SelectionChangedEvent;
>import org.eclipse.jface.viewers.Viewer;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.graphics.Image;
>import org.eclipse.swt.layout.FillLayout;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Composite;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.Menu;
>import org.eclipse.swt.widgets.Shell;
>import org.eclipse.zest.core.viewers.AbstractZoomableViewer;
>import org.eclipse.zest.core.viewers.GraphViewer;
>import org.eclipse.zest.core.viewers.ISelfStyleProvider;
>import org.eclipse.zest.core.viewers.IZoomableWorkbenchPart;
>import org.eclipse.zest.core.viewers.ZoomContributionViewItem;
>import org.eclipse.zest.core.widgets.GraphConnection;
>import org.eclipse.zest.core.widgets.GraphNode;
>import org.eclipse.zest.layouts.algorithms.TreeLayoutAlgorithm;
>
>/**
> * Shows the zooming functionality.
> */
>public class ZoomingGraphJFaceExample {
>
>	private static class MyCustomAnchor extends AbstractConnectionAnchor {
>		public static int LEFT = 0;
>		public static int RIGHT = 1;
>		private int style;
>
>		public MyCustomAnchor(int style, IFigure nodeFigure) {
>			super(nodeFigure);
>			this.style = style;
>		}
>
>		public Point getLocation(Point arg0) {
>			Rectangle bounds = getOwner().getBounds();
>			int w = bounds.width;
>			int h = bounds.height;
>			int x = bounds.x;
>			int y = bounds.y;
>
>			return (style & RIGHT) != 0 ? new Point(x + w, y + h / 2)
>					: new Point(x, y + h / 2);
>		}
>	}
>
>	static class MyContentProvider implements ITreeContentProvider {
>
>		private static final String n1 = "First", n2 = "Second", n3 = "Third",
>				n4 = "Fourth";
>
>		public Object[] getElements(Object inputElement) {
>			return new String[] { n1 };
>		}
>
>		public void dispose() {
>		}
>
>		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
>		}
>
>		public Object[] getChildren(Object parentElement) {
>			if (parentElement.equals(n1)) {
>				return new Object[] { n2, n3 };
>			}
>			if (parentElement.equals(n2)) {
>				return new Object[] { n4 };
>			}
>			return null;
>		}
>
>		public Object getParent(Object element) {
>			if (element.equals(n2)) {
>				return n1;
>			} else if (element.equals(n3)) {
>				return n1;
>			} else if (element.equals(n4)) {
>				return new Object[] { n2 };
>			}
>			return null;
>		}
>
>		public boolean hasChildren(Object element) {
>			return element.equals("First") || element.equals("Second");
>		}
>	}
>
>	static class MyLabelProvider extends LabelProvider implements
>			ISelfStyleProvider {
>		final Image image = Display.getDefault().getSystemImage(
>				SWT.ICON_WARNING);
>
>		public Image getImage(Object element) {
>			if (element instanceof String) {
>				return image;
>			}
>			return null;
>		}
>
>		public String getText(Object element) {
>			if (element instanceof String) {
>				return element.toString();
>			}
>			return null;
>		}
>
>		public void selfStyleConnection(Object element,
>				GraphConnection connection) {
>			Connection conn = connection.getConnectionFigure();
>			conn.setSourceAnchor(new MyCustomAnchor(MyCustomAnchor.RIGHT,
>					connection.getSource().getFigure()));
>			conn.setTargetAnchor(new MyCustomAnchor(MyCustomAnchor.LEFT,
>					connection.getDestination().getFigure()));
>			RelativeBendpoint bp1 = new RelativeBendpoint(conn);
>			bp1.setWeight(1);
>			bp1.setRelativeDimensions(new Dimension(0, 0),
>					new Dimension(-80, 0));
>			conn.getConnectionRouter().setConstraint(conn,
>					Arrays.asList(new Object[] { bp1 }));
>		}
>
>		public void selfStyleNode(Object element, GraphNode node) {
>		}
>	}
>
>	private static class ExtGraphViewer extends GraphViewer implements
>			IZoomableWorkbenchPart {
>		public ExtGraphViewer(Composite composite, int style) {
>			super(composite, style);
>		}
>
>		public AbstractZoomableViewer getZoomableViewer() {
>			return this;
>		}
>	}
>
>	static ExtGraphViewer viewer = null;
>
>	public static void main(String[] args) {
>		Display d = new Display();
>		Shell shell = new Shell(d);
>		shell.setLayout(new FillLayout(SWT.VERTICAL));
>		shell.setSize(400, 400);
>		Button button = new Button(shell, SWT.PUSH);
>		button.setText("Reload");
>		button.addSelectionListener(new SelectionAdapter() {
>			public void widgetSelected(SelectionEvent e) {
>				viewer.setInput(new Object());
>			}
>		});
>		viewer = new ExtGraphViewer(shell, SWT.NONE);
>		viewer.setContentProvider(new MyContentProvider());
>		viewer.setLabelProvider(new MyLabelProvider());
>		viewer.setLayoutAlgorithm(new TreeLayoutAlgorithm());
>		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
>			public void selectionChanged(SelectionChangedEvent event) {
>				System.out.println("Selection changed: "
>						+ (event.getSelection()));
>			}
>		});
>		viewer.setInput(new Object());
>
>		MenuManager tbm = new MenuManager();
>		Menu menu = tbm.createContextMenu(viewer.getControl());
>		viewer.getControl().setMenu(menu);
>		ZoomContributionViewItem toolbarZoomContributionViewItem = new ZoomContributionViewItem(
>				viewer);
>		tbm.add(toolbarZoomContributionViewItem);
>
>		shell.open();
>		while (!shell.isDisposed()) {
>			while (!d.readAndDispatch()) {
>				d.sleep();
>			}
>		}
>	}
>}

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Attachments on bug 369357: 209892