/*******************************************************************************
* Copyright 2013 Comcast Cable Communications Management, LLC
*
* 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.marshalchen.common.uimodule.freeflow.core;
import java.util.ArrayList;
import java.util.List;
import android.graphics.Rect;
import android.util.Pair;
import com.marshalchen.common.uimodule.freeflow.animations.FreeFlowLayoutAnimator;
public class LayoutChangeset {
protected List<Pair<FreeFlowItem, Rect>> moved;
protected List<FreeFlowItem> removed;
protected List<FreeFlowItem> added;
public LayoutChangeset() {
moved = new ArrayList<Pair<FreeFlowItem, Rect>>();
removed = new ArrayList<FreeFlowItem>();
added = new ArrayList<FreeFlowItem>();
}
public void addToMoved(FreeFlowItem proxy, Rect oldFrame) {
moved.add(new Pair<FreeFlowItem, Rect>(proxy, oldFrame));
}
public void addToDeleted(FreeFlowItem proxy) {
removed.add(proxy);
}
public void addToAdded(FreeFlowItem proxy) {
added.add(proxy);
}
/**
* Returns the list of FreeFlowItems that will be added because they are
* present in the new Layout that the FreeFlowContainer is transitioning to.
* The views representing these items are already placed on the stage before
* the LayoutAnimator is called.
*
*/
public List<FreeFlowItem> getAdded() {
return added;
}
/**
* Returns the list of FreeFlowItems that are not present in the current
* viewport of the layout that the FreeFlowContainer is transitioning to,
* and needs to be removed.
*
* The views represnting the FreeFlowItems in this list are still on the
* stage when the LayoutAnimator is given control if you want to animate the
* removal. You don't have to call removeView on these items, the
* FreeFlowContainer will do that when the animator relinquishes control by
* calling the
* {@link com.marshalchen.common.uimodule.freeflow.core.FreeFlowContainer#onLayoutChangeAnimationsCompleted(FreeFlowLayoutAnimator anim)}
*
* @return
*/
public List<FreeFlowItem> getRemoved() {
return removed;
}
/**
* Returns all the items that will move when the layouts change (not added
* or removed). The returned item is a Pair: the first item representing the
* FreeFlowItem that represents the view being moved and the second the Rect
* it is moving from.
*
* To get a reference to the view thats moving, you can call item.view on
* the FreeFlowItem. To get a reference to the Rect its moving to, call
* item.frame.
*/
public List<Pair<FreeFlowItem, Rect>> getMoved() {
return moved;
}
@Override
public String toString() {
return "Added: " + added.size() + "," + "Removed: " + removed.size()
+ "," + "Moved: " + moved.size();
}
public boolean isEmpty() {
return (added.size() == 0 && removed.size() == 0 && moved.size() == 0);
}
}