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an Open Source BPMN 2.0 Modeler
package org.yaoqiang.graph.swing;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Rectangle;
import java.util.EventObject;
import javax.swing.JComboBox;
import javax.swing.JPanel;
import javax.swing.text.JTextComponent;
import org.yaoqiang.bpmn.model.elements.XMLElement;
import org.yaoqiang.bpmn.model.elements.artifacts.CategoryValue;
import org.yaoqiang.bpmn.model.elements.artifacts.Group;
import org.yaoqiang.bpmn.model.elements.core.common.FlowElements;
import org.yaoqiang.bpmn.model.elements.data.DataObject;
import org.yaoqiang.bpmn.model.elements.data.DataObjectReference;
import org.yaoqiang.bpmn.model.elements.data.DataStore;
import org.yaoqiang.bpmn.model.elements.data.DataStoreReference;
import org.yaoqiang.graph.model.GraphModel;
import org.yaoqiang.graph.view.Graph;
import com.mxgraph.swing.mxGraphComponent;
import com.mxgraph.swing.view.mxCellEditor;
import com.mxgraph.util.mxConstants;
import com.mxgraph.util.mxUtils;
import com.mxgraph.view.mxCellState;
/**
* CellEditor
*
* @author Shi Yaoqiang([email protected])
*/
public class CellEditor extends mxCellEditor {
protected transient JComboBox comboBox;
public CellEditor(mxGraphComponent graphComponent) {
super(graphComponent);
}
public GraphComponent getGraphComponent() {
return (GraphComponent) graphComponent;
}
public Component getEditor()
{
if (textArea.getParent() != null)
{
return textArea;
}
// ==============start==============
else if (comboBox != null && comboBox.getParent() != null)
{
return comboBox;
}
// ==============end================
else if (editingCell != null)
{
return editorPane;
}
return null;
}
public Rectangle getEditorBounds(mxCellState state, double scale)
{
Graph graph = (Graph) state.getView().getGraph();
GraphModel model = graph.getModel();
Rectangle bounds = null;
if (useLabelBounds(state))
{
bounds = state.getLabelBounds().getRectangle();
bounds.height += 10;
}
else
{
bounds = state.getRectangle();
}
// Applies the horizontal and vertical label positions
if (model.isVertex(state.getCell()))
{
String horizontal = mxUtils.getString(state.getStyle(),
mxConstants.STYLE_LABEL_POSITION, mxConstants.ALIGN_CENTER);
if (horizontal.equals(mxConstants.ALIGN_LEFT))
{
bounds.x -= state.getWidth();
}
else if (horizontal.equals(mxConstants.ALIGN_RIGHT))
{
bounds.x += state.getWidth();
}
String vertical = mxUtils.getString(state.getStyle(),
mxConstants.STYLE_VERTICAL_LABEL_POSITION,
mxConstants.ALIGN_MIDDLE);
if (vertical.equals(mxConstants.ALIGN_TOP))
{
bounds.y -= state.getHeight();
}
else if (vertical.equals(mxConstants.ALIGN_BOTTOM))
{
bounds.y += state.getHeight();
}
}
bounds.setSize(
(int) Math.max(bounds.getWidth(),
Math.round(minimumWidth * scale)),
(int) Math.max(bounds.getHeight(),
Math.round(minimumHeight * scale)));
// ==============start==============
if (model.isGroupArtifact(state.getCell()) || model.isDataStore(state.getCell()) || model.isDataObject(state.getCell())) {
int width = (comboBox == null ? 120 : comboBox.getWidth());
int y = (int) (state.getY() + state.getHeight());
if (model.isGroupArtifact(state.getCell())) {
y = (int) state.getY();
}
bounds.setLocation((int) state.getCenterX() - width / 2, y);
bounds.setSize(width, (int) (25 * scale));
}
// ==============end================
return bounds;
}
public void startEditing(Object cell, EventObject evt)
{
if (editingCell != null)
{
stopEditing(true);
}
mxCellState state = graphComponent.getGraph().getView().getState(cell);
if (state != null)
{
editingCell = cell;
trigger = evt;
Graph graph = getGraphComponent().getGraph();
GraphModel model = graph.getModel();
double scale = Math.max(minimumEditorScale, graph.getView().getScale());
scrollPane.setBounds(getEditorBounds(state, scale));
scrollPane.setVisible(true);
Object value = getInitialValue(state, evt);
JTextComponent currentEditor = null;
// Configures the style of the in-place editor
if (graph.isHtmlLabel(cell))
{
if (isExtractHtmlBody())
{
value = mxUtils.getBodyMarkup((String) value,
isReplaceHtmlLinefeeds());
}
editorPane.setDocument(mxUtils.createHtmlDocumentObject(
state.getStyle(), scale));
editorPane.setText((String) value);
// Workaround for wordwrapping in editor pane
// FIXME: Cursor not visible at end of line
JPanel wrapper = new JPanel(new BorderLayout());
wrapper.setOpaque(false);
wrapper.add(editorPane, BorderLayout.CENTER);
scrollPane.setViewportView(wrapper);
currentEditor = editorPane;
}
// ==============start==============
else if (model.isGroupArtifact(cell) || model.isDataStore(cell) || model.isDataObject(cell))
{
if (model.isGroupArtifact(cell)) {
comboBox = new JComboBox(model.getBpmnModel().getAllCategoryValues().toArray());
} else if (model.isDataStore(cell)) {
comboBox = new JComboBox(model.getBpmnModel().getDataStores().toArray());
} else {
FlowElements flowElements = (FlowElements) ((XMLElement) model.getValue(cell)).getParent();
if (model.isCollectionDataObject(cell)) {
comboBox = new JComboBox(flowElements.getAccessibleDataObjects(true).toArray());
} else {
comboBox = new JComboBox(flowElements.getAccessibleDataObjects(false).toArray());
}
}
comboBox.setFont(mxUtils.getFont(state.getStyle(), scale));
Color fontColor = mxUtils.getColor(state.getStyle(),
mxConstants.STYLE_FONTCOLOR, Color.black);
comboBox.setForeground(fontColor);
comboBox.setSelectedItem(value);
scrollPane.setViewportView(comboBox);
}// ==============end================
else
{
textArea.setFont(mxUtils.getFont(state.getStyle(), scale));
Color fontColor = mxUtils.getColor(state.getStyle(),
mxConstants.STYLE_FONTCOLOR, Color.black);
textArea.setForeground(fontColor);
textArea.setText((String) value);
scrollPane.setViewportView(textArea);
currentEditor = textArea;
}
graphComponent.getGraphControl().add(scrollPane, 0);
if (isHideLabel(state))
{
graphComponent.redraw(state);
}
if (currentEditor != null) {
currentEditor.revalidate();
currentEditor.requestFocusInWindow();
currentEditor.selectAll();
}
graphComponent.revalidate();
configureActionMaps();
}
}
public void stopEditing(boolean cancel)
{
if (editingCell != null)
{
Graph graph = getGraphComponent().getGraph();
scrollPane.transferFocusUpCycle();
Object cell = editingCell;
editingCell = null;
if (!cancel)
{
EventObject trig = trigger;
trigger = null;
Object currentValue = getCurrentValue();
// ==============start==============
if (graph.getModel().isDataStore(cell)) {
DataStoreReference dsRef = (DataStoreReference) ((XMLElement) graph.getModel().getValue(cell)).clone();
if (currentValue instanceof DataStore) {
dsRef.setDataStoreRef(((DataStore)currentValue).getId());
}
currentValue = dsRef;
} else if (graph.getModel().isDataObject(cell)) {
DataObjectReference doRef = (DataObjectReference) ((XMLElement) graph.getModel().getValue(cell)).clone();
if (currentValue instanceof DataObject) {
doRef.setDataObjectRef(((DataObject)currentValue).getId());
}
currentValue = doRef;
} else if (graph.getModel().isGroupArtifact(cell)) {
Group group = (Group) ((XMLElement) graph.getModel().getValue(cell)).clone();
if (currentValue instanceof CategoryValue) {
group.setCategoryValueRef(((CategoryValue)currentValue).getId());
}
currentValue = group;
}
// ==============end================
graphComponent.labelChanged(cell, currentValue, trig);
}
else
{
mxCellState state = graph.getView()
.getState(cell);
graphComponent.redraw(state);
}
if (scrollPane.getParent() != null)
{
scrollPane.setVisible(false);
scrollPane.getParent().remove(scrollPane);
}
graphComponent.requestFocusInWindow();
}
}
protected Object getInitialValue(mxCellState state, EventObject trigger)
{
Object value = graphComponent.getEditingValue(state.getCell(), trigger);
// ==============start==============
GraphModel model = getGraphComponent().getGraph().getModel();
if (model.isDataStore(state.getCell())) {
value = model.getBpmnModel().getDataStore(((DataStoreReference)model.getValue(state.getCell())).getDataStoreRef());
} else if (model.isGroupArtifact(state.getCell())) {
value = model.getBpmnModel().getCategoryValue(((Group)model.getValue(state.getCell())).getCategoryValueRef());
} else if (model.isDataObject(state.getCell())) {
value = ((DataObjectReference)model.getValue(state.getCell())).getRefDataObject();
}
// ==============end================
return value;
}
public Object getCurrentValue()
{
Object result;
if (textArea.getParent() != null)
{
result = textArea.getText();
}// ==============start==============
else if (comboBox != null && comboBox.getParent() != null) {
if (comboBox.getSelectedItem() != null) {
result = comboBox.getSelectedItem();
} else {
result = "";
}
}// ==============end================
else
{
result = editorPane.getText();
if (isExtractHtmlBody())
{
result = mxUtils
.getBodyMarkup((String) result, isReplaceHtmlLinefeeds());
}
}
return result;
}
}
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