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/*
* Copyright 2000-2012 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.designer.palette;
import com.intellij.designer.PaletteToolWindowContent;
import com.intellij.designer.designSurface.DesignerEditorPanel;
import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.application.ApplicationManager;
import com.intellij.ui.ScrollPaneFactory;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.awt.*;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceAdapter;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceListener;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @author Alexander Lobas
*/
public class PalettePanel extends JPanel implements DataProvider, PaletteToolWindowContent {
private final JPanel myPaletteContainer = new PaletteContainer();
private List<PaletteGroupComponent> myGroupComponents = Collections.emptyList();
private List<PaletteItemsComponent> myItemsComponents = Collections.emptyList();
private List<PaletteGroup> myGroups = Collections.emptyList();
private DesignerEditorPanel myDesigner;
private final FocusListener myFocusListener = new FocusAdapter() {
@Override
public void focusGained(FocusEvent e) {
for (PaletteItemsComponent itemsComponent : myItemsComponents) {
itemsComponent.clearSelection();
}
}
};
private final ListSelectionListener mySelectionListener = new ListSelectionListener() {
@Override
public void valueChanged(ListSelectionEvent event) {
notifySelection(event);
}
};
private final DragSourceListener myDragSourceListener = new DragSourceAdapter() {
@Override
public void dragDropEnd(DragSourceDropEvent event) {
Component component = event.getDragSourceContext().getComponent();
if (!event.getDropSuccess() &&
component instanceof PaletteItemsComponent &&
myDesigner != null &&
myDesigner.getRootPane() == ((JComponent)component).getRootPane()) {
myDesigner.getToolProvider().loadDefaultTool();
}
}
};
public PalettePanel() {
super(new GridLayout(1, 1));
JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myPaletteContainer);
scrollPane.setBorder(null);
add(scrollPane);
new AnAction() {
@Override
public void actionPerformed(AnActionEvent e) {
clearActiveItem();
}
}.registerCustomShortcutSet(new CustomShortcutSet(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0)), scrollPane);
if (!ApplicationManager.getApplication().isHeadlessEnvironment()) {
DragSource.getDefaultDragSource().addDragSourceListener(myDragSourceListener);
}
}
@Override
public void dispose() {
if (!ApplicationManager.getApplication().isHeadlessEnvironment()) {
DragSource.getDefaultDragSource().removeDragSourceListener(myDragSourceListener);
}
}
@Nullable
public PaletteItem getActiveItem() {
for (PaletteGroupComponent groupComponent : myGroupComponents) {
if (groupComponent.isSelected()) {
PaletteItem paletteItem = (PaletteItem)groupComponent.getItemsComponent().getSelectedValue();
if (paletteItem != null) {
return paletteItem;
}
}
}
return null;
}
@Override
public void clearActiveItem() {
if (getActiveItem() != null) {
for (PaletteItemsComponent itemsComponent : myItemsComponents) {
itemsComponent.clearSelection();
}
notifySelection(null);
}
}
@Override
public void refresh() {
repaint();
}
public void loadPalette(@Nullable DesignerEditorPanel designer) {
if (myDesigner == null && designer == null) {
return;
}
if (myDesigner != null && designer != null && myGroups.equals(designer.getPaletteGroups())) {
myDesigner = designer;
restoreSelection();
return;
}
for (PaletteItemsComponent itemsComponent : myItemsComponents) {
itemsComponent.removeListSelectionListener(mySelectionListener);
}
myDesigner = designer;
myPaletteContainer.removeAll();
if (designer == null) {
myGroups = Collections.emptyList();
myGroupComponents = Collections.emptyList();
myItemsComponents = Collections.emptyList();
}
else {
myGroups = designer.getPaletteGroups();
myGroupComponents = new ArrayList<PaletteGroupComponent>();
myItemsComponents = new ArrayList<PaletteItemsComponent>();
}
for (PaletteGroup group : myGroups) {
PaletteGroupComponent groupComponent = new PaletteGroupComponent(group);
PaletteItemsComponent itemsComponent = new PaletteItemsComponent(group, designer);
groupComponent.setItemsComponent(itemsComponent);
groupComponent.addFocusListener(myFocusListener);
myGroupComponents.add(groupComponent);
itemsComponent.addListSelectionListener(mySelectionListener);
myItemsComponents.add(itemsComponent);
myPaletteContainer.add(groupComponent);
myPaletteContainer.add(itemsComponent);
}
myPaletteContainer.revalidate();
if (myDesigner != null) {
restoreSelection();
}
}
private void restoreSelection() {
PaletteItem paletteItem = myDesigner.getActivePaletteItem();
for (PaletteItemsComponent itemsComponent : myItemsComponents) {
itemsComponent.restoreSelection(paletteItem);
}
}
private void notifySelection(@Nullable ListSelectionEvent event) {
if (event != null) {
PaletteItemsComponent sourceItemsComponent = (PaletteItemsComponent)event.getSource();
for (int i = event.getFirstIndex(); i <= event.getLastIndex(); i++) {
if (sourceItemsComponent.isSelectedIndex(i)) {
for (PaletteItemsComponent itemsComponent : myItemsComponents) {
if (itemsComponent != sourceItemsComponent) {
itemsComponent.clearSelection();
}
}
PaletteItem paletteItem = (PaletteItem)sourceItemsComponent.getSelectedValue();
if (paletteItem != null && !paletteItem.isEnabled()) {
sourceItemsComponent.clearSelection();
}
break;
}
}
}
if (myDesigner != null) {
myDesigner.activatePaletteItem(getActiveItem());
}
}
@Override
public Object getData(@NonNls String dataId) {
if (PlatformDataKeys.FILE_EDITOR.is(dataId) && myDesigner != null) {
return myDesigner.getEditor();
}
return null;
}
}
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