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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
*
* 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.android.ide.common.api;
import com.android.annotations.Nullable;
import com.google.common.annotations.Beta;
import java.util.List;
/**
* Default implementation of an {@link IViewRule}. This is a convenience
* implementation which makes it easier to supply designtime behavior for a
* custom view and just override the methods you are interested in.
* <p>
* <b>NOTE: This is not a public or final API; if you rely on this be prepared
* to adjust your code for the next tools release.</b>
*/
@Beta
public class AbstractViewRule implements IViewRule {
@Override
public boolean onInitialize(String fqcn, IClientRulesEngine engine) {
return true;
}
@Override
public void onDispose() {
}
@Override
@Nullable
public String getDisplayName() {
// Default is to not override the selection display name.
return null;
}
// ==== Selection ====
@Override
@Nullable
public List<String> getSelectionHint(INode parentNode, INode childNode) {
return null;
}
@Override
public void addLayoutActions(List<RuleAction> actions, INode parentNode,
List<? extends INode> children) {
}
@Override
public void addContextMenuActions(List<RuleAction> actions, INode node) {
}
@Override
public void paintSelectionFeedback(IGraphics graphics, INode parentNode,
List<? extends INode> childNodes, Object view) {
}
// ==== Drag & drop support ====
// By default Views do not accept drag'n'drop.
@Override
@Nullable
public DropFeedback onDropEnter(INode targetNode, Object targetView, IDragElement[] elements) {
return null;
}
@Override
@Nullable
public DropFeedback onDropMove(INode targetNode, IDragElement[] elements,
DropFeedback feedback, Point p) {
return null;
}
@Override
public void onDropLeave(INode targetNode, IDragElement[] elements, DropFeedback feedback) {
// ignore
}
@Override
public void onDropped(
INode targetNode,
IDragElement[] elements,
DropFeedback feedback,
Point p) {
// ignore
}
@Override
public void onPaste(INode targetNode, Object targetView, IDragElement[] pastedElements) {
}
// ==== Create/Remove hooks ====
@Override
public void onCreate(INode node, INode parent, InsertType insertType) {
}
@Override
public void onChildInserted(INode child, INode parent, InsertType insertType) {
}
@Override
public void onRemovingChildren(List<INode> deleted, INode parent) {
}
// ==== Resizing ====
@Override
@Nullable
public DropFeedback onResizeBegin(INode child, INode parent, SegmentType horizontalEdge,
SegmentType verticalEdge, Object childView, Object parentView) {
return null;
}
@Override
public void onResizeUpdate(DropFeedback feedback, INode child, INode parent, Rect newBounds,
int modifierMask) {
}
@Override
public void onResizeEnd(DropFeedback feedback, INode child, final INode parent,
final Rect newBounds) {
}
}
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