src/com/android/launcher2/SearchDropTargetBar.java

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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.android.launcher2;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;

import com.android.launcher.R;

/*
 * Ths bar will manage the transition between the QSB search bar and the delete drop
 * targets so that each of the individual IconDropTargets don't have to.
 */
public class SearchDropTargetBar extends FrameLayout implements DragController.DragListener {

    private static final int sTransitionInDuration = 275;
    private static final int sTransitionOutDuration = 200;

    private View mQSBSearchBar;
    private View mDropTargetBar;
    private IconDropTarget mInfoDropTarget;
    private IconDropTarget mDeleteDropTarget;

    public SearchDropTargetBar(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SearchDropTargetBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public void setup(Launcher launcher, DragController dragController) {
        dragController.addDragListener(this);
        dragController.addDragListener(mInfoDropTarget);
        dragController.addDragListener(mDeleteDropTarget);
        dragController.addDropTarget(mInfoDropTarget);
        dragController.addDropTarget(mDeleteDropTarget);
        mInfoDropTarget.setLauncher(launcher);
        mDeleteDropTarget.setLauncher(launcher);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        // Get the individual components
        mQSBSearchBar = findViewById(R.id.qsb_search_bar);
        mDropTargetBar = findViewById(R.id.drag_target_bar);
        mInfoDropTarget = (IconDropTarget) mDropTargetBar.findViewById(R.id.info_target);
        mDeleteDropTarget = (IconDropTarget) mDropTargetBar.findViewById(R.id.delete_target);
    }

    /*
     * DragController.DragListener implementation
     */
    @Override
    public void onDragStart(DragSource source, Object info, int dragAction) {
        // Animate out the QSB search bar, and animate in the drop target bar
        mQSBSearchBar.animate().alpha(0f).setDuration(sTransitionOutDuration);
        mDropTargetBar.animate().alpha(1f).setDuration(sTransitionInDuration);
    }

    @Override
    public void onDragEnd() {
        // Restore the QSB search bar, and animate out the drop target bar
        mDropTargetBar.animate().alpha(0f).setDuration(sTransitionOutDuration);
        mQSBSearchBar.animate().alpha(1f).setDuration(sTransitionInDuration);
    }
}