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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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 com.intellij.ui;
import com.intellij.openapi.ui.popup.JBPopup;
import com.intellij.psi.PsiElement;
import com.intellij.ui.components.JBList;
import com.intellij.ui.popup.PopupUpdateProcessorBase;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.util.Collection;
/**
* @author pegov
*/
public abstract class JBListWithHintProvider extends JBList {
private JBPopup myHint;
public JBListWithHintProvider() {
addSelectionListener();
}
public JBListWithHintProvider(ListModel dataModel) {
super(dataModel);
addSelectionListener();
}
public JBListWithHintProvider(Object... listData) {
super(listData);
addSelectionListener();
}
public JBListWithHintProvider(Collection items) {
super(items);
addSelectionListener();
}
private void addSelectionListener() {
addListSelectionListener(new ListSelectionListener() {
@Override
public void valueChanged(final ListSelectionEvent e) {
if (getClientProperty(ListUtil.SELECTED_BY_MOUSE_EVENT) != Boolean.TRUE) {
final Object[] selectedValues = ((JList)e.getSource()).getSelectedValues();
if (selectedValues.length != 1) return;
final PsiElement element = getPsiElementForHint(selectedValues[0]);
if (element != null && element.isValid()) {
updateHint(element);
}
}
}
});
}
@Nullable
protected abstract PsiElement getPsiElementForHint(final Object selectedValue);
public void registerHint(final JBPopup hint) {
hideHint();
myHint = hint;
}
public void hideHint() {
if (myHint != null && myHint.isVisible()) {
myHint.cancel();
}
myHint = null;
}
public void updateHint(PsiElement element) {
if (myHint == null || !myHint.isVisible()) return;
final PopupUpdateProcessorBase updateProcessor = myHint.getUserData(PopupUpdateProcessorBase.class);
if (updateProcessor != null) {
updateProcessor.updatePopup(element);
}
}
}
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