| /******************************************************************************* |
| * Copyright 2005-2007, CHISEL Group, University of Victoria, Victoria, BC, |
| * Canada. 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: The Chisel Group, University of Victoria IBM CAS, IBM Toronto |
| * Lab |
| ******************************************************************************/ |
| package org.eclipse.pde.visualization.dependency.views; |
| |
| import org.eclipse.pde.visualization.dependency.Activator; |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.events.SelectionListener; |
| import org.eclipse.swt.graphics.GC; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.ImageData; |
| import org.eclipse.swt.graphics.ImageLoader; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.graphics.Rectangle; |
| import org.eclipse.swt.layout.GridData; |
| import org.eclipse.swt.layout.GridLayout; |
| import org.eclipse.swt.widgets.Canvas; |
| import org.eclipse.swt.widgets.Dialog; |
| import org.eclipse.swt.widgets.Display; |
| import org.eclipse.swt.widgets.Event; |
| import org.eclipse.swt.widgets.FileDialog; |
| import org.eclipse.swt.widgets.Listener; |
| import org.eclipse.swt.widgets.ScrollBar; |
| import org.eclipse.swt.widgets.Shell; |
| import org.eclipse.swt.widgets.ToolBar; |
| import org.eclipse.swt.widgets.ToolItem; |
| |
| |
| /** |
| * An image preview pane to show a preview of the screenshot and allow the user to save |
| * the image to a file. |
| * |
| * @author Ian Bull |
| * |
| */ |
| public class ImagePreviewPane extends Dialog { |
| |
| private Shell shell; |
| private Point size; |
| private Image image; |
| |
| public ImagePreviewPane(Shell parent) { |
| super(parent); |
| } |
| |
| |
| private void createImagePreviewPane() { |
| |
| shell.setLayout(new GridLayout()); |
| |
| ToolBar toolBar = new ToolBar(shell, SWT.NONE); |
| GridData data = new GridData(SWT.FILL, SWT.FILL, true, false); |
| toolBar.setLayoutData(data); |
| |
| ToolItem saveItem = new ToolItem(toolBar, SWT.NONE); |
| saveItem.setText("Save Image"); |
| saveItem.addSelectionListener(new SelectionListener() { |
| |
| public void widgetDefaultSelected(SelectionEvent e) { |
| |
| } |
| |
| public void widgetSelected(SelectionEvent e) { |
| FileDialog dialog = new FileDialog (shell, SWT.SAVE); |
| dialog.setFilterNames (new String [] {"Image Files", "All Files (*.*)"}); |
| dialog.setFilterExtensions (new String [] {"*.png", "*.*"}); //Windows wild cards |
| dialog.setFilterPath ("c:\\"); //Windows path |
| dialog.setFileName ("dependencies.png"); |
| String fileName = dialog.open(); |
| ImageLoader loader = new ImageLoader(); |
| loader.data = new ImageData[] {image.getImageData()}; |
| loader.save(fileName, SWT.IMAGE_PNG); |
| } |
| |
| }); |
| |
| final Canvas canvas = new Canvas(shell, SWT.BORDER | SWT.NO_BACKGROUND | SWT.NO_REDRAW_RESIZE | SWT.V_SCROLL | SWT.H_SCROLL); |
| |
| data = new GridData(SWT.FILL, SWT.FILL, true, true); |
| canvas.setLayoutData(data); |
| canvas.setBackground(canvas.getDisplay().getSystemColor(SWT.COLOR_WHITE)); |
| |
| final Point origin = new Point (0, 0); |
| canvas.setBounds(10, 10, size.x + 10, size.y + 10); |
| |
| final ScrollBar hBar = canvas.getHorizontalBar (); |
| hBar.addListener (SWT.Selection, new Listener () { |
| public void handleEvent (Event e) { |
| int hSelection = hBar.getSelection (); |
| int destX = -hSelection - origin.x; |
| Rectangle rect = image.getBounds (); |
| canvas.scroll (destX, 0, 0, 0, rect.width, rect.height, false); |
| origin.x = -hSelection; |
| } |
| }); |
| |
| final ScrollBar vBar = canvas.getVerticalBar (); |
| vBar.addListener (SWT.Selection, new Listener () { |
| public void handleEvent (Event e) { |
| int vSelection = vBar.getSelection (); |
| int destY = -vSelection - origin.y; |
| Rectangle rect = image.getBounds (); |
| canvas.scroll (0, destY, 0, 0, rect.width, rect.height, false); |
| origin.y = -vSelection; |
| } |
| }); |
| canvas.addListener (SWT.Resize, new Listener () { |
| public void handleEvent (Event e) { |
| Rectangle rect = image.getBounds (); |
| Rectangle client = canvas.getClientArea (); |
| hBar.setMaximum (rect.width); |
| vBar.setMaximum (rect.height); |
| hBar.setThumb (Math.min (rect.width, client.width)); |
| vBar.setThumb (Math.min (rect.height, client.height)); |
| int hPage = rect.width - client.width; |
| int vPage = rect.height - client.height; |
| int hSelection = hBar.getSelection (); |
| int vSelection = vBar.getSelection (); |
| if (hSelection >= hPage) { |
| if (hPage <= 0) { |
| hSelection = 0; |
| } |
| origin.x = -hSelection; |
| } |
| if (vSelection >= vPage) { |
| if (vPage <= 0) { |
| vSelection = 0; |
| } |
| origin.y = -vSelection; |
| } |
| canvas.redraw (); |
| } |
| }); |
| canvas.addListener (SWT.Paint, new Listener () { |
| public void handleEvent (Event e) { |
| GC gc = e.gc; |
| gc.drawImage (image, origin.x, origin.y); |
| Rectangle rect = image.getBounds (); |
| Rectangle client = canvas.getClientArea (); |
| int marginWidth = client.width - rect.width; |
| if (marginWidth > 0) { |
| gc.fillRectangle (rect.width, 0, marginWidth, client.height); |
| } |
| int marginHeight = client.height - rect.height; |
| if (marginHeight > 0) { |
| gc.fillRectangle (0, rect.height, client.width, marginHeight); |
| } |
| } |
| }); |
| } |
| |
| private void freeResources() { |
| image.dispose(); |
| } |
| |
| |
| public void open (Image image, Point size) { |
| Shell parent = getParent(); |
| shell = new Shell(parent, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE | SWT.MAX); |
| shell.setText(getText()); |
| shell.setImage(Activator.getDefault().getImageRegistry().get(Activator.PLUGIN_OBJ)); |
| |
| |
| |
| this.image = image; |
| this.size = size; |
| |
| createImagePreviewPane(); |
| shell.addListener(SWT.Close, new Listener() { |
| public void handleEvent(Event e) { |
| ImagePreviewPane.this.freeResources(); |
| } |
| }); |
| shell.open(); |
| shell.setSize(800, 600); |
| Display display = parent.getDisplay(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) { |
| display.sleep(); |
| } |
| } |
| } |
| |
| } |