/*
* Copyright 2005 JBoss 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 org.drools.eclipse.flow.common.view.datatype.editor.impl;
import org.drools.eclipse.DroolsEclipsePlugin;
import org.drools.eclipse.flow.common.datatype.DataTypeRegistry;
import org.drools.core.process.core.datatype.DataType;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
/**
* Combobox for datatypes based on a datatype registry.
*/
public class DataTypeCombo extends Composite {
private DataTypeRegistry registry;
private ComboViewer dataTypeCombo;
public DataTypeCombo(Composite parent, int style, DataTypeRegistry registry) {
super(parent, style);
this.registry = registry;
setLayout(new FillLayout());
dataTypeCombo = new ComboViewer(this, SWT.READ_ONLY);
dataTypeCombo.setLabelProvider(new LabelProvider() {
public String getText(Object element) {
return ((DataTypeRegistry.IDataTypeInfo) element).getName();
}
});
dataTypeCombo.add(registry.getDataTypes().toArray(
new DataTypeRegistry.IDataTypeInfo[0]));
}
private DataTypeRegistry.IDataTypeInfo getSelectedTypeInfo() {
ISelection selection = dataTypeCombo.getSelection();
if (!selection.isEmpty()) {
return (DataTypeRegistry.IDataTypeInfo)
((StructuredSelection) selection).getFirstElement();
}
return null;
}
public void setDataType(DataType dataType) {
if (dataType == null) {
dataTypeCombo.setSelection(null);
} else {
// TODO : check what happens if dataType not in combo
try {
dataTypeCombo.setSelection(new StructuredSelection(registry.getDataTypeInfo(dataType.getClass())));
} catch (IllegalArgumentException e) {
// "DataTypeInfo not found in registry: " + dataType.getClass()
DroolsEclipsePlugin.log(e);
}
}
}
public DataType getDataType() {
DataTypeRegistry.IDataTypeInfo dataTypeInfo =
getSelectedTypeInfo();
return dataTypeInfo == null ? null :
dataTypeInfo.getDataTypeFactory().createDataType();
}
public void reset() {
dataTypeCombo.setSelection(null);
}
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
dataTypeCombo.getCombo().setEnabled(enabled);
}
public void addSelectionChangedListener(ISelectionChangedListener listener) {
dataTypeCombo.addSelectionChangedListener(listener);
}
}