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/**
* Copyright (c) 2014 CEA LIST.
*
* 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:
* CEA LIST - Initial API and implementation
*/
package org.eclipse.papyrus.dd.dg.editor;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Frame;
import org.apache.batik.swing.JSVGCanvas;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.papyrus.dd.editor.DDEditorPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
* This is a page that renders on canvas the corresponding SVG for a DG model
*/
public class DGSVGCanvasPage extends DDEditorPage {
/**
* The page id
*/
public static final String ID = DGSVGCanvasPage.class.getName();
/**
* The canvas viewer of the page
*/
protected SVGCanvasViewer viewer;
/**
* Constructs a new SVG canvas page for a given DG editor
*
* @param editor
* The DG editor
*/
public DGSVGCanvasPage(DGEditor editor) {
super(editor, ID, getString("DGSVGCanvasPage.title"));
}
@Override
protected Viewer createViewer(Composite formBody) {
viewer = new SVGCanvasViewer(formBody);
return viewer;
}
@Override
public void refresh() {
EditingDomain editingDomain = getDDEditor().getEditingDomain();
Resource resource = editingDomain.getResourceSet().getResources()
.get(0);
// (re)generate the SVG document
Document svgDocument = getConverter().convert(resource);
// update the input of the viewer
viewer.setInput(svgDocument);
}
/**
* Gets an instance of <code>DGToSVGConverter</code>
*
* @return DGToSVGConverter
*/
protected DGToSVGConverter getConverter() {
return new DGToSVGConverter();
}
/**
* This is a viewer that embeds a SVG canvas in a SWT composite
*/
public static class SVGCanvasViewer extends Viewer {
/**
* This is main widget of the viewer
*/
private Composite composite;
/**
* This is the embedded SVG canvas
*/
private JSVGCanvas svgCanvas;
/**
* Constructs a new Canvas viewer
*
* @param parent
* the SWT composite parent control
*/
public SVGCanvasViewer(Composite parent) {
composite = new Composite(parent, SWT.EMBEDDED);
Frame frame = SWT_AWT.new_Frame(composite);
frame.setVisible(true);
svgCanvas = new JSVGCanvas();
svgCanvas.setDocumentState(JSVGCanvas.ALWAYS_DYNAMIC);
frame.add(svgCanvas);
}
@Override
public Control getControl() {
return composite;
}
@Override
public Object getInput() {
return svgCanvas.getSVGDocument();
}
@Override
public void setInput(final Object input) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
Document doc = (Document) input;
svgCanvas.setDocument(doc);
// sets the background color of the canvas explicitly since
// the CSS background-color
// property is not supported by Batik yet
Element svg = doc.getDocumentElement();
String value = svg
.getAttribute(DGToSVGConverter.SVG_BACKGROUND_COLOR_ATTRIBUTE);
if (value != null && value.length() > 0)
svgCanvas.setBackground(Color.decode(value));
else
svgCanvas.setBackground(Color.white);
}
});
}
@Override
public ISelection getSelection() {
return StructuredSelection.EMPTY;
}
@Override
public void refresh() {
// do nothing
}
@Override
public void setSelection(ISelection selection, boolean reveal) {
// do nothing
}
};
}
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