/*******************************************************************************
* 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.gef.policy.grid.header.layout;
import com.google.gdt.eclipse.designer.gef.policy.grid.FlexLayoutEditPolicy;
import com.google.gdt.eclipse.designer.gef.policy.grid.header.edit.RowHeaderEditPart;
import com.google.gdt.eclipse.designer.gef.policy.grid.header.selection.RowSelectionEditPolicy;
import com.google.gdt.eclipse.designer.model.widgets.panels.grid.HTMLTableInfo;
import org.eclipse.wb.core.gef.figure.TextFeedback;
import org.eclipse.wb.core.gef.header.AbstractHeaderLayoutEditPolicy;
import org.eclipse.wb.core.gef.policy.layout.grid.AbstractGridLayoutEditPolicy;
import org.eclipse.wb.core.gef.policy.layout.grid.IGridInfo;
import org.eclipse.wb.draw2d.Figure;
import org.eclipse.wb.draw2d.FigureUtils;
import org.eclipse.wb.draw2d.Layer;
import org.eclipse.wb.draw2d.geometry.Interval;
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.IEditPartViewer;
import org.eclipse.wb.gef.core.policies.EditPolicy;
import org.eclipse.wb.gef.core.requests.ChangeBoundsRequest;
import org.eclipse.wb.gef.core.requests.IDropRequest;
import org.eclipse.wb.gef.core.requests.Request;
import org.eclipse.wb.gef.graphical.policies.LayoutEditPolicy;
import java.text.MessageFormat;
/**
* Implementation of {@link LayoutEditPolicy} for {@link RowHeaderEditPart}.
*
* @author scheglov_ke
* @coverage gwt.gef.policy
*/
public final class RowsLayoutEditPolicy extends AbstractHeaderLayoutEditPolicy {
private final FlexLayoutEditPolicy m_mainPolicy;
private final HTMLTableInfo m_panel;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public RowsLayoutEditPolicy(FlexLayoutEditPolicy mainPolicy, HTMLTableInfo panel) {
super(mainPolicy);
m_mainPolicy = mainPolicy;
m_panel = panel;
}
////////////////////////////////////////////////////////////////////////////
//
// Children
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void decorateChild(EditPart child) {
child.installEditPolicy(EditPolicy.SELECTION_ROLE, new RowSelectionEditPolicy(m_mainPolicy));
}
////////////////////////////////////////////////////////////////////////////
//
// Move
//
////////////////////////////////////////////////////////////////////////////
private final Figure m_insertFeedback = AbstractGridLayoutEditPolicy.createInsertFigure();
private TextFeedback m_feedback;
private Command m_moveCommand;
@Override
protected Command getMoveCommand(ChangeBoundsRequest request) {
return m_moveCommand;
}
@Override
protected void showLayoutTargetFeedback(Request request) {
// prepare header
RowHeaderEditPart headerEditPart;
{
ChangeBoundsRequest changeBoundsRequest = (ChangeBoundsRequest) request;
headerEditPart = (RowHeaderEditPart) changeBoundsRequest.getEditParts().get(0);
}
// prepare location
Point location;
{
IDropRequest dropRequest = (IDropRequest) request;
location = dropRequest.getLocation().getCopy();
}
// prepare target header
RowHeaderEditPart target = null;
{
for (EditPart editPart : getHost().getChildren()) {
RowHeaderEditPart rowEditPart = (RowHeaderEditPart) editPart;
Rectangle bounds = rowEditPart.getFigure().getBounds();
if (location.y < bounds.getCenter().y) {
target = rowEditPart;
break;
}
}
}
// prepare grid information
IGridInfo gridInfo = m_panel.getGridInfo();
Interval[] columnIntervals = gridInfo.getColumnIntervals();
Interval[] rowIntervals = gridInfo.getRowIntervals();
int x1 = columnIntervals[0].begin - 5;
int x2 = columnIntervals[columnIntervals.length - 1].end() + 5;
// prepare index of target column and position for insert feedbacks
final int targetIndex;
int y;
int size = AbstractGridLayoutEditPolicy.INSERT_ROW_SIZE;
if (target != null) {
targetIndex = target.getIndex();
y = rowIntervals[targetIndex].begin - size / 2;
if (targetIndex != 0) {
y -= (rowIntervals[targetIndex].begin - rowIntervals[targetIndex - 1].end()) / 2;
}
} else {
targetIndex = m_panel.getRows().size();
y = rowIntervals[rowIntervals.length - 1].end() - size / 2;
}
// show insert feedbacks
{
// ...on main viewer
m_mainPolicy.showInsertFeedbacks(new Rectangle(x1, y, x2 - x1, size), null);
// ...on header viewer
{
if (m_insertFeedback.getParent() == null) {
addFeedback(m_insertFeedback);
}
// set bounds
Point offset = headerEditPart.getOffset();
Rectangle bounds = new Rectangle(0, y + offset.y, getHostFigure().getSize().width, size);
m_insertFeedback.setBounds(bounds);
}
}
// show text feedback
{
Layer feedbackLayer = getMainLayer(IEditPartViewer.FEEDBACK_LAYER);
// add feedback
if (m_feedback == null) {
m_feedback = new TextFeedback(feedbackLayer);
m_feedback.add();
}
// set feedback bounds
{
Point feedbackLocation = new Point(10, location.y + 10);
FigureUtils.translateAbsoluteToFigure(feedbackLayer, feedbackLocation);
m_feedback.setLocation(feedbackLocation);
}
// set text
m_feedback.setText(MessageFormat.format("row: {0}", targetIndex));
}
// prepare command XXX
/*{
final int sourceIndex = headerEditPart.getIndex();
m_moveCommand = new EditCommand(m_layout) {
@Override
protected void executeEdit() throws Exception {
m_layout.moveRow(sourceIndex, targetIndex);
}
};
}*/
}
@Override
protected void eraseLayoutTargetFeedback(Request request) {
m_mainPolicy.eraseInsertFeedbacks();
FigureUtils.removeFigure(m_insertFeedback);
if (m_feedback != null) {
m_feedback.remove();
m_feedback = null;
}
}
}