/*******************************************************************************
* Copyright 2017 Capital One Services, LLC and Bitwise, Inc.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* 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 hydrograph.ui.graph.action;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.editparts.ZoomListener;
import org.eclipse.gef.editparts.ZoomManager;
import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.CellEditorActionHandler;
import hydrograph.ui.graph.figure.CommentBoxFigure;
/**
* The Class CommentBoxLabelEditManager.
*
* @author Bitwise
*
*/
public class CommentBoxLabelEditManager
extends DirectEditManager
{
private IActionBars actionBars;
private CellEditorActionHandler actionHandler;
private IAction copy, cut, paste, undo, redo, find, selectAll, delete;
private double cachedZoom = -1.0;
private Font scaledFont;
private ZoomListener zoomListener = new ZoomListener() {
public void zoomChanged(double newZoom) {
updateScaledFont(newZoom);
}
};
/**
* Instantiates a new CommentBoxLabelEditManager.
*
* @param source
* the source
* @param locator
* the locator
*/
public CommentBoxLabelEditManager(GraphicalEditPart source, CellEditorLocator locator) {
super(source, null, locator);
}
/**
* Cleanup is done here. Any feedback is erased and listeners unhooked.
*/
protected void bringDown() {
ZoomManager zoomMgr = (ZoomManager)getEditPart().getViewer()
.getProperty(ZoomManager.class.toString());
if (zoomMgr != null)
zoomMgr.removeZoomListener(zoomListener);
if (actionHandler != null) {
actionHandler.dispose();
actionHandler = null;
}
if (actionBars != null) {
restoreSavedActions(actionBars);
actionBars.updateActionBars();
actionBars = null;
}
super.bringDown();
disposeScaledFont();
}
/**
* Creates the cell editor on the given composite. The cell editor is
* created by instantiating the cell editor type passed into this
* DirectEditManager's constuctor.
*
* @param composite
* the composite to create the cell editor on
* @return the newly created cell editor
*/
protected CellEditor createCellEditorOn(Composite composite) {
return new TextCellEditor(composite, SWT.MULTI | SWT.WRAP);
}
/**
* dispose the font those are scaled
*/
private void disposeScaledFont() {
if (scaledFont != null) {
scaledFont.dispose();
scaledFont = null;
}
}
/**
* Initializes the cell editor. Subclasses should implement this to set the
* initial text and add things such as {@link VerifyListener
* VerifyListeners}, if needed.
*/
protected void initCellEditor() {
CommentBoxFigure comment = (CommentBoxFigure)getEditPart().getFigure();
getCellEditor().setValue(comment.getText());
ZoomManager zoomMgr = (ZoomManager)getEditPart().getViewer()
.getProperty(ZoomManager.class.toString());
if (zoomMgr != null) {
cachedZoom = -1.0;
updateScaledFont(zoomMgr.getZoom());
zoomMgr.addZoomListener(zoomListener);
} else
getCellEditor().getControl().setFont(comment.getFont());
actionBars = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
.getActiveEditor().getEditorSite().getActionBars();
saveCurrentActions(actionBars);
actionHandler = new CellEditorActionHandler(actionBars);
actionHandler.addCellEditor(getCellEditor());
actionBars.updateActionBars();
}
/**
* restores the saved actions
* @param actionbars
* at actionbars
*/
private void restoreSavedActions(IActionBars actionBars){
actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), copy);
actionBars.setGlobalActionHandler(ActionFactory.PASTE.getId(), paste);
actionBars.setGlobalActionHandler(ActionFactory.DELETE.getId(), delete);
actionBars.setGlobalActionHandler(ActionFactory.SELECT_ALL.getId(), selectAll);
actionBars.setGlobalActionHandler(ActionFactory.CUT.getId(), cut);
actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(), find);
actionBars.setGlobalActionHandler(ActionFactory.UNDO.getId(), undo);
actionBars.setGlobalActionHandler(ActionFactory.REDO.getId(), redo);
}
/**
* save the current actions
* @param actionbars
* at actionbars
*/
private void saveCurrentActions(IActionBars actionBars) {
copy = actionBars.getGlobalActionHandler(ActionFactory.COPY.getId());
paste = actionBars.getGlobalActionHandler(ActionFactory.PASTE.getId());
delete = actionBars.getGlobalActionHandler(ActionFactory.DELETE.getId());
selectAll = actionBars.getGlobalActionHandler(ActionFactory.SELECT_ALL.getId());
cut = actionBars.getGlobalActionHandler(ActionFactory.CUT.getId());
find = actionBars.getGlobalActionHandler(ActionFactory.FIND.getId());
undo = actionBars.getGlobalActionHandler(ActionFactory.UNDO.getId());
redo = actionBars.getGlobalActionHandler(ActionFactory.REDO.getId());
}
/**
* update scaledFonts
* @param zoom
* at zoom
*/
private void updateScaledFont(double zoom) {
if (cachedZoom == zoom)
return;
Text text = (Text)getCellEditor().getControl();
Font font = getEditPart().getFigure().getFont();
disposeScaledFont();
cachedZoom = zoom;
if (zoom == 1.0)
text.setFont(font);
else {
FontData fd = font.getFontData()[0];
fd.setHeight((int)(fd.getHeight() * zoom));
text.setFont(scaledFont = new Font(null, fd));
}
}
}