/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.google.gdt.eclipse.designer.smart.gef.policy;
import com.google.common.collect.Lists;
import com.google.gdt.eclipse.designer.ToolkitProvider;
import com.google.gdt.eclipse.designer.gef.WidgetsLayoutRequestValidator;
import com.google.gdt.eclipse.designer.model.widgets.WidgetInfo;
import com.google.gdt.eclipse.designer.smart.model.CanvasAlignmentSupport;
import com.google.gdt.eclipse.designer.smart.model.CanvasInfo;
import com.google.gdt.eclipse.designer.smart.model.WidgetCanvasInfo;
import org.eclipse.wb.core.gef.command.EditCommand;
import org.eclipse.wb.core.model.IAbstractComponentInfo;
import org.eclipse.wb.draw2d.geometry.Dimension;
import org.eclipse.wb.draw2d.geometry.Insets;
import org.eclipse.wb.draw2d.geometry.Point;
import org.eclipse.wb.draw2d.geometry.Rectangle;
import org.eclipse.wb.gef.core.Command;
import org.eclipse.wb.gef.core.EditPart;
import org.eclipse.wb.gef.core.policies.EditPolicy;
import org.eclipse.wb.gef.core.policies.ILayoutRequestValidator;
import org.eclipse.wb.gef.core.requests.ChangeBoundsRequest;
import org.eclipse.wb.gef.core.requests.CreateRequest;
import org.eclipse.wb.gef.graphical.policies.LayoutEditPolicy;
import org.eclipse.wb.internal.core.gef.policy.layout.absolute.AbsoluteBasedLayoutEditPolicy;
import org.eclipse.wb.internal.core.gef.policy.layout.absolute.AbsoluteLayoutSelectionEditPolicy;
import org.eclipse.wb.internal.core.gef.policy.layout.absolute.AbsolutePolicyUtils;
import org.eclipse.wb.internal.core.gef.policy.layout.absolute.actions.AbstractAlignmentActionsSupport;
import org.eclipse.wb.internal.core.gef.policy.snapping.IAbsoluteLayoutCommands;
import org.eclipse.wb.internal.core.laf.BaselineSupportHelper;
import org.eclipse.wb.internal.core.model.description.ToolkitDescription;
import java.util.ArrayList;
import java.util.List;
/**
* {@link LayoutEditPolicy} for {@link CanvasInfo}.
*
* @author scheglov_ke
* @coverage SmartGWT.gef.policy
*/
public final class CanvasLayoutEditPolicy extends AbsoluteBasedLayoutEditPolicy<WidgetInfo> {
private final CanvasInfo m_canvas;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public CanvasLayoutEditPolicy(CanvasInfo canvas) {
super(canvas);
m_canvas = canvas;
createPlacementsSupport(IAbsoluteLayoutCommands.EMPTY);
}
////////////////////////////////////////////////////////////////////////////
//
// Requests
//
////////////////////////////////////////////////////////////////////////////
@Override
protected ILayoutRequestValidator getRequestValidator() {
return WidgetsLayoutRequestValidator.INSTANCE;
}
////////////////////////////////////////////////////////////////////////////
//
// Selection Policy
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void decorateChild(EditPart child) {
Object childModel = child.getModel();
if (childModel instanceof WidgetInfo) {
EditPolicy policy = new AbsoluteLayoutSelectionEditPolicy<WidgetInfo>();
child.installEditPolicy(EditPolicy.SELECTION_ROLE, policy);
}
}
////////////////////////////////////////////////////////////////////////////
//
// IVisualDataProvider
//
////////////////////////////////////////////////////////////////////////////
@Override
public List<WidgetInfo> getAllComponents() {
List<WidgetInfo> components = m_canvas.getWidgets();
return new ArrayList<WidgetInfo>(components);
}
public int getBaseline(IAbstractComponentInfo component) {
return BaselineSupportHelper.getBaseline(component.getObject());
}
public Dimension getComponentPreferredSize(IAbstractComponentInfo component) {
return component.getPreferredSize();
}
@Override
public int getComponentGapValue(IAbstractComponentInfo component1,
IAbstractComponentInfo component2,
int direction) {
return AbsolutePolicyUtils.DEFAULT_COMPONENT_GAP;
}
@Override
public int getContainerGapValue(IAbstractComponentInfo component, int direction) {
return AbsolutePolicyUtils.DEFAULT_CONTAINER_GAP;
}
public Dimension getContainerSize() {
Dimension size = m_canvas.getModelBounds().getSize().getCopy();
Insets insets = m_canvas.getClientAreaInsets();
return size.shrink(insets.getWidth(), insets.getHeight());
}
////////////////////////////////////////////////////////////////////////////
//
// Commands
//
////////////////////////////////////////////////////////////////////////////
@Override
protected Command getCreateCommand(CreateRequest request) {
final WidgetInfo component = (WidgetInfo) request.getNewObject();
return new EditCommand(m_canvas) {
@Override
protected void executeEdit() throws Exception {
placementsSupport.commitAdd();
Rectangle widgetModelBounds = component.getModelBounds();
m_canvas.command_absolute_CREATE(component, null);
Point location = widgetModelBounds.getLocation();
Dimension size = getSize(widgetModelBounds);
CanvasInfo boundsCanvas = getBoundsCanvas(component);
if (boundsCanvas != null) {
m_canvas.command_BOUNDS(boundsCanvas, location, size);
}
}
private Dimension getSize(Rectangle widgetModelBounds) {
boolean setSize = component.shouldSetReasonableSize();
return setSize || m_resizeOnCreate ? widgetModelBounds.getSize() : null;
}
};
}
@Override
protected void doPasteComponent(Point pasteLocation, PastedComponentInfo pastedWidget)
throws Exception {
WidgetInfo component = (WidgetInfo) pastedWidget.getComponent();
// create
m_canvas.command_absolute_CREATE(component, null);
m_canvas.command_BOUNDS(
getBoundsCanvas(component),
pasteLocation.getTranslated(pastedWidget.getBounds().getLocation()),
pastedWidget.getBounds().getSize());
}
@Override
protected Command getMoveCommand(ChangeBoundsRequest request) {
final List<EditPart> editParts = request.getEditParts();
return new EditCommand(m_canvas) {
@Override
protected void executeEdit() throws Exception {
ArrayList<IAbstractComponentInfo> models = Lists.newArrayList();
for (EditPart editPart : editParts) {
models.add((IAbstractComponentInfo) editPart.getModel());
}
placementsSupport.commit();
for (IAbstractComponentInfo widget : models) {
Rectangle bounds = widget.getModelBounds();
WidgetInfo component = (WidgetInfo) widget;
CanvasInfo boundsCanvas = getBoundsCanvas(component);
if (boundsCanvas != null) {
m_canvas.command_BOUNDS(boundsCanvas, bounds.getLocation(), null);
}
}
}
};
}
@Override
protected Command getAddCommand(ChangeBoundsRequest request) {
final List<EditPart> editParts = request.getEditParts();
return new EditCommand(m_canvas) {
@Override
protected void executeEdit() throws Exception {
ArrayList<IAbstractComponentInfo> models = Lists.newArrayList();
for (EditPart editPart : editParts) {
models.add((IAbstractComponentInfo) editPart.getModel());
}
placementsSupport.commitAdd();
for (IAbstractComponentInfo widget : models) {
Rectangle bounds = widget.getModelBounds();
WidgetInfo component = (WidgetInfo) widget;
m_canvas.command_absolute_MOVE(component, null);
CanvasInfo boundsCanvas = getBoundsCanvas(component);
if (boundsCanvas != null) {
m_canvas.command_BOUNDS(boundsCanvas, bounds.getLocation(), null);
}
}
}
};
}
@Override
protected Command getResizeCommand(final ChangeBoundsRequest request) {
return new EditCommand(m_canvas) {
@Override
protected void executeEdit() throws Exception {
for (EditPart editPart : request.getEditParts()) {
IAbstractComponentInfo widget = (IAbstractComponentInfo) editPart.getModel();
Rectangle bounds = widget.getModelBounds();
WidgetInfo component = (WidgetInfo) widget;
CanvasInfo boundsCanvas = getBoundsCanvas(component);
if (boundsCanvas != null) {
m_canvas.command_BOUNDS(boundsCanvas, bounds.getLocation(), bounds.getSize());
}
}
}
};
}
////////////////////////////////////////////////////////////////////////////
//
// Selection Actions
//
////////////////////////////////////////////////////////////////////////////
@Override
protected AbstractAlignmentActionsSupport<WidgetInfo> getAlignmentActionsSupport() {
return new CanvasAlignmentSupport(m_canvas);
}
////////////////////////////////////////////////////////////////////////////
//
// Misc
//
////////////////////////////////////////////////////////////////////////////
@Override
protected ToolkitDescription getToolkit() {
return ToolkitProvider.DESCRIPTION;
}
////////////////////////////////////////////////////////////////////////////
//
// Utils
//
////////////////////////////////////////////////////////////////////////////
public CanvasInfo getBoundsCanvas(WidgetInfo widget) {
if (widget instanceof CanvasInfo) {
return (CanvasInfo) widget;
}
if (widget.getParentJava() instanceof WidgetCanvasInfo) {
return (CanvasInfo) widget.getParentJava();
}
return null;
}
}