| /******************************************************************************* |
| * Copyright (c) 2005 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.bpel.ui; |
| |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| import org.eclipse.bpel.ui.editparts.ProcessEditPart; |
| import org.eclipse.bpel.ui.util.BPELUtil; |
| import org.eclipse.bpel.ui.util.IModelVisitor; |
| import org.eclipse.bpel.ui.util.ModelHelper; |
| import org.eclipse.draw2d.FigureCanvas; |
| import org.eclipse.draw2d.IFigure; |
| import org.eclipse.draw2d.Viewport; |
| import org.eclipse.draw2d.geometry.Dimension; |
| import org.eclipse.draw2d.geometry.Point; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| import org.eclipse.gef.EditPart; |
| import org.eclipse.gef.GraphicalEditPart; |
| import org.eclipse.gef.ui.parts.GraphicalViewerImpl; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.swt.events.FocusEvent; |
| import org.eclipse.swt.events.FocusListener; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| |
| /** |
| * We override ScrollingGraphicalViewer so we can install our own root edit part. |
| * The root edit part is responsible for creating the layers, and the BPEL |
| * editor wants many extra layers. |
| * |
| * We extend GraphicalViewerImpl instead of ScrollingGraphicalViewer because this |
| * is the only way that we can override and modify the reveal() behaviour. |
| */ |
| public class ScrollingBPELGraphicalViewer extends GraphicalViewerImpl { |
| private HashMap orderMap = null; |
| protected List selectionList = null; |
| protected int indexVisit = 0; |
| protected boolean hasFocus; |
| protected boolean updatingPropertiesViewInput; |
| |
| protected void createDefaultRoot() { |
| setRootEditPart(new GraphicalBPELRootEditPart()); |
| } |
| |
| public class numeratorVisitor implements IModelVisitor { |
| public boolean visit(Object modelObject) { |
| indexVisit++; |
| orderMap.put(modelObject, new Integer(indexVisit)); |
| return true; |
| } |
| } |
| |
| private class OrderedSelectionComparator implements Comparator { |
| public int compare(Object o1, Object o2) { |
| int val1 = 0, val2 = 0; |
| EditPart ep1 = (EditPart) o1; |
| EditPart ep2 = (EditPart) o2; |
| Object m1 = ep1.getModel(); |
| Object m2 = ep2.getModel(); |
| if (orderMap.get(m1) != null) |
| val1 = ((Integer)orderMap.get(m1)).intValue(); |
| if (orderMap.get(m2) != null) |
| val2 = ((Integer)orderMap.get(m2)).intValue(); |
| if (val1 < val2) |
| return -1; |
| else |
| if (val1 > val2) |
| return 1; |
| return 0; |
| } |
| } |
| |
| public void appendSelection(EditPart editpart) { |
| super.appendSelection(editpart); |
| |
| // We want to keep the selection in model order. |
| selectionList = primGetSelectedEditParts(); |
| if (selectionList.size() > 1){ |
| indexVisit = 0; |
| orderMap = new HashMap(); |
| BPELUtil.visitModelDepthFirst(ModelHelper.getProcess(editpart.getModel()), new numeratorVisitor()); |
| Comparator cmp = new OrderedSelectionComparator(); |
| Collections.sort(selectionList, cmp); |
| StructuredSelection newSel = new StructuredSelection(selectionList); |
| setSelection(newSel); |
| } |
| orderMap = null; |
| selectionList = null; |
| } |
| |
| /** |
| * @see org.eclipse.gef.EditPartViewer#createControl(org.eclipse.swt.widgets.Composite) |
| */ |
| public final Control createControl(Composite parent) { |
| final FigureCanvas canvas = new FigureCanvas(parent, getLightweightSystem()); |
| canvas.addFocusListener(new FocusListener() { |
| |
| public void focusGained(FocusEvent e) { |
| hasFocus = true; |
| canvas.redraw(); |
| } |
| |
| public void focusLost(FocusEvent e) { |
| hasFocus = false; |
| canvas.redraw(); |
| }}); |
| |
| super.setControl(canvas); |
| installRootFigure(); |
| return canvas; |
| } |
| /** |
| * Convenience method which types the control as a <code>FigureCanvas</code>. This method |
| * returns <code>null</code> whenever the control is null. |
| * @return <code>null</code> or the Control as a FigureCanvas |
| */ |
| protected FigureCanvas getFigureCanvas() { |
| return (FigureCanvas)getControl(); |
| } |
| |
| public boolean getFigureCanvasFocus() { |
| return hasFocus; |
| } |
| |
| /** |
| * If the figure is a viewport, set the canvas' viewport, otherwise, set its contents. |
| */ |
| private void installRootFigure() { |
| if (getFigureCanvas() == null) |
| return; |
| IFigure rootFigure = getRootFigure(); |
| if (rootFigure instanceof Viewport) |
| getFigureCanvas().setViewport((Viewport)rootFigure); |
| else |
| getFigureCanvas().setContents(rootFigure); |
| } |
| |
| /** |
| * Extends the superclass implementation to scroll the native Canvas control after the |
| * super's implementation has completed. |
| * @see org.eclipse.gef.EditPartViewer#reveal(org.eclipse.gef.EditPart) |
| */ |
| public void reveal(EditPart part) { |
| // New rule: Don't scroll *up* if it would cause any currently visible |
| // part of the edit part to disappear off the bottom. |
| // Likewise, don't scroll down if it would cause any currently visible |
| // part of the edit part to disappear off the top, but this is |
| // unlikely to happen anyway. |
| super.reveal(part); |
| if (part instanceof ProcessEditPart) { |
| // We never want to even try to reveal the process edit part. |
| return; |
| } |
| Viewport port = getFigureCanvas().getViewport(); |
| IFigure target = ((GraphicalEditPart)part).getFigure(); |
| Rectangle exposeRegion = target.getBounds().getExpanded(5, 5); |
| target = target.getParent(); |
| while (target != null && target != port) { |
| target.translateToParent(exposeRegion); |
| target = target.getParent(); |
| } |
| Dimension viewportSize = port.getClientArea().getSize(); |
| Point topLeft = exposeRegion.getTopLeft(); |
| Point bottomRight = exposeRegion. |
| getBottomRight(). |
| translate(viewportSize.negate()); |
| Point finalLocation = Point.min(topLeft, |
| Point.max(bottomRight, port.getViewLocation())); |
| |
| Dimension existingSize = port.getSize(); |
| int oldViewportY = port.getViewLocation().y; |
| int newViewportY = finalLocation.y; |
| int figureY = exposeRegion.y; |
| int figureHeight = exposeRegion.height; |
| int bottomVisibleBefore = Math.min(figureY + figureHeight, oldViewportY + existingSize.height); |
| int bottomVisibleAfter = Math.min(figureY + figureHeight, newViewportY + existingSize.height); |
| if (bottomVisibleAfter < bottomVisibleBefore) { |
| // Truncate it so that we don't lose anything off the bottom of the screen. |
| finalLocation.y = figureY + figureHeight - existingSize.height; |
| } |
| int topVisibleBefore = Math.max(figureY, oldViewportY); |
| int topVisibleAfter = Math.max(figureY, finalLocation.y); |
| if (topVisibleAfter > topVisibleBefore && bottomVisibleAfter < bottomVisibleBefore) { |
| // Moving it would change both the top and bottom. Don't do anyting. |
| finalLocation.y = oldViewportY; |
| } |
| getFigureCanvas().scrollSmoothTo(finalLocation.x, finalLocation.y); |
| } |
| |
| /** |
| * @see GraphicalViewerImpl#setRootFigure(IFigure) |
| */ |
| protected void setRootFigure(IFigure figure) { |
| // Warning: The super does more work than the old method did. |
| super.setRootFigure(figure); |
| installRootFigure(); |
| } |
| |
| public void scrollVertical(boolean up) { |
| Viewport port = getFigureCanvas().getViewport(); |
| Point finalLocation = port.getViewLocation().getCopy(); |
| finalLocation.y += up ? -100: 100; |
| getFigureCanvas().scrollSmoothTo(finalLocation.x, finalLocation.y); |
| } |
| |
| public void scrollHorizontal(boolean left) { |
| Viewport port = getFigureCanvas().getViewport(); |
| Point finalLocation = port.getViewLocation().getCopy(); |
| finalLocation.x += left ? -100: 100; |
| getFigureCanvas().scrollSmoothTo(finalLocation.x, finalLocation.y); |
| } |
| |
| /** |
| * See comments in BPELSelectionTool.handleFocusLost(). |
| */ |
| protected void fireSelectionChanged() { |
| try { |
| updatingPropertiesViewInput = true; |
| super.fireSelectionChanged(); |
| } finally { |
| updatingPropertiesViewInput = false; |
| } |
| } |
| |
| /** |
| * Returns true if it is sending an event that updates the |
| * properties view input. |
| * |
| * See comments in BPELSelectionTool.handleFocusLost(). |
| */ |
| public boolean isUpdatingPropertiesViewInput() { |
| return updatingPropertiesViewInput; |
| } |
| |
| public ISelection getSelection() { |
| if (getSelectedEditParts().isEmpty()) { |
| return StructuredSelection.EMPTY; |
| } |
| return new StructuredSelection(getSelectedEditParts()); |
| } |
| } |