Java tutorial
/* * 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 org.cordovastudio.editors.designer.designSurface; import com.intellij.ide.DeleteProvider; import com.intellij.openapi.actionSystem.*; import com.intellij.ui.IdeBorderFactory; import com.intellij.ui.SideBorder; import com.intellij.ui.components.JBLayeredPane; import com.intellij.util.containers.IntArrayList; import org.cordovastudio.editors.designer.actions.CommonEditActionsProvider; import org.cordovastudio.editors.designer.designSurface.decorators.ComponentDecorator; import org.cordovastudio.editors.designer.designSurface.decorators.EmptyComponentDecorator; import org.cordovastudio.editors.designer.designSurface.editableArea.ComponentEditableArea; import org.cordovastudio.editors.designer.designSurface.editableArea.IEditableArea; import org.cordovastudio.editors.designer.designSurface.layers.DecorationLayer; import org.cordovastudio.editors.designer.designSurface.layers.FeedbackLayer; import org.cordovastudio.editors.designer.designSurface.layers.GlassLayer; import org.cordovastudio.editors.designer.designSurface.operations.EditOperation; import org.cordovastudio.editors.designer.designSurface.tools.InputTool; import org.cordovastudio.editors.designer.model.FindComponentVisitor; import org.cordovastudio.editors.designer.model.RadComponent; import org.cordovastudio.editors.designer.model.RadVisualComponent; import org.jetbrains.annotations.NonNls; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import javax.swing.*; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import java.awt.*; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * @author Alexander Lobas */ public class CaptionPanel extends JBLayeredPane implements DataProvider, DeleteProvider { private static final int SIZE = 16; private final boolean myHorizontal; private final IEditableArea myMainArea; private final IEditableArea myArea; private final DecorationLayer myDecorationLayer; private final FeedbackLayer myFeedbackLayer; private DefaultActionGroup myActionGroup; private final CommonEditActionsProvider myActionsProvider; private final RadVisualComponent myRootComponent; private List<RadComponent> myRootChildren = Collections.emptyList(); private ICaption myCaption; public CaptionPanel(CordovaDesignerEditorPanel designer, boolean horizontal, boolean addBorder) { if (addBorder) { setBorder(IdeBorderFactory.createBorder(horizontal ? SideBorder.BOTTOM : SideBorder.RIGHT)); } setFocusable(true); myHorizontal = horizontal; myMainArea = designer.getSurfaceArea(); myRootComponent = new RadVisualComponent() { @Override public List<RadComponent> getChildren() { return myRootChildren; } @Override public boolean canDelete() { return false; } }; myRootComponent.setNativeComponent(this); if (horizontal) { myRootComponent.setBounds(0, 0, 100000, SIZE); } else { myRootComponent.setBounds(0, 0, SIZE, 100000); } myArea = new ComponentEditableArea(this) { @Override protected void fireSelectionChanged() { super.fireSelectionChanged(); revalidate(); repaint(); } @Override public RadComponent findTarget(int x, int y, @Nullable ComponentTargetFilter filter) { FindComponentVisitor visitor = new FindComponentVisitor(CaptionPanel.this, filter, x, y); myRootComponent.accept(visitor, false); return visitor.getResult(); } @Override public InputTool findTargetTool(int x, int y) { return myDecorationLayer.findTargetTool(x, y); } @Override public void showSelection(boolean value) { myDecorationLayer.showSelection(value); } @Override public ComponentDecorator getRootSelectionDecorator() { return EmptyComponentDecorator.INSTANCE; } @Override public EditOperation processRootOperation(OperationContext context) { return null; } @Override public FeedbackLayer getFeedbackLayer() { return myFeedbackLayer; } @Override public RadComponent getRootComponent() { return myRootComponent; } @Override public ActionGroup getPopupActions() { if (myActionGroup == null) { myActionGroup = new DefaultActionGroup(); myActionGroup.add(ActionManager.getInstance().getAction(IdeActions.ACTION_DELETE)); } return myActionGroup; } @Override public String getPopupPlace() { return "UIDesigner.CaptionPanel"; } }; add(new GlassLayer(designer.getToolProvider(), myArea), CordovaDesignerEditorPanel.LAYER_GLASS); myDecorationLayer = new DecorationLayer(designer, myArea); add(myDecorationLayer, CordovaDesignerEditorPanel.LAYER_DECORATION); myFeedbackLayer = new FeedbackLayer(); add(myFeedbackLayer, CordovaDesignerEditorPanel.LAYER_FEEDBACK); myActionsProvider = new CommonEditActionsProvider(designer) { @Override protected IEditableArea getArea(DataContext dataContext) { return myArea; } }; myMainArea.addSelectionListener(new ComponentSelectionListener() { @Override public void selectionChanged(IEditableArea area) { update(); } }); } public void attachToScrollPane(JScrollPane scrollPane) { scrollPane.getViewport().addChangeListener(new ChangeListener() { public void stateChanged(ChangeEvent e) { repaint(); } }); } public void doLayout() { for (int i = getComponentCount() - 1; i >= 0; i--) { Component component = getComponent(i); component.setBounds(0, 0, getWidth(), getHeight()); } } @Override public Dimension getPreferredSize() { return new Dimension(SIZE, SIZE); } @Override public Dimension getMinimumSize() { return getPreferredSize(); } @Override public Object getData(@NonNls String dataId) { if (PlatformDataKeys.DELETE_ELEMENT_PROVIDER.is(dataId)) { return this; } return null; } @Override public boolean canDeleteElement(@NotNull DataContext dataContext) { return myActionsProvider.canDeleteElement(dataContext); } @Override public void deleteElement(@NotNull DataContext dataContext) { myActionsProvider.deleteElement(dataContext); } public void update() { List<RadComponent> selection = myMainArea.getSelection(); if (selection.size() != 1) { if (myCaption != null) { myCaption = null; myRootComponent.setLayout(null); myRootChildren = Collections.emptyList(); myArea.deselectAll(); revalidate(); repaint(); } return; } boolean update = !myRootChildren.isEmpty(); IntArrayList oldSelection = null; if (myCaption != null) { oldSelection = new IntArrayList(); for (RadComponent component : myArea.getSelection()) { oldSelection.add(myRootChildren.indexOf(component)); } } myArea.deselectAll(); myRootComponent.setLayout(null); ICaption caption = null; RadComponent component = selection.get(0); RadComponent parent = component.getParent(); if (parent != null) { caption = parent.getLayout().getCaption(component); } if (caption == null) { caption = component.getCaption(); } if (caption == null) { myRootChildren = Collections.emptyList(); } else { myRootComponent.setLayout(caption.getCaptionLayout(myMainArea, myHorizontal)); myRootChildren = caption.getCaptionChildren(myMainArea, myHorizontal); for (RadComponent child : myRootChildren) { child.setParent(myRootComponent); } if (myCaption == caption) { List<RadComponent> newSelection = new ArrayList<RadComponent>(); int componentSize = myRootChildren.size(); int selectionSize = oldSelection.size(); for (int i = 0; i < selectionSize; i++) { int index = oldSelection.get(i); if (0 <= index && index < componentSize) { newSelection.add(myRootChildren.get(index)); } } if (!newSelection.isEmpty()) { myArea.setSelection(newSelection); } } update |= !myRootChildren.isEmpty(); } myCaption = caption; if (update) { revalidate(); repaint(); } } }