/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.systemui.statusbar.phone;
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import android.graphics.Canvas;
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import android.graphics.Point;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.view.View;
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import android.widget.ImageView;
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/** Creates a scaled-up version of an app icon for dragging. */
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class AppIconDragShadowBuilder extends View.DragShadowBuilder {
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private final static int ICON_SCALE = 2;
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final Drawable mDrawable;
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final int mIconSize; // Height and width in device-pixels.
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public AppIconDragShadowBuilder(ImageView icon) {
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mDrawable = icon.getDrawable();
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// The Drawable may not be the same size as the ImageView, so use the ImageView size.
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// The ImageView is not square because it has additional left and right padding to create
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// a wider drop target, so use the height to create a square drag shadow.
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mIconSize = icon.getHeight() * ICON_SCALE;
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}
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@Override
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public void onProvideShadowMetrics(Point size, Point touch) {
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size.set(mIconSize, mIconSize);
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// Shift the drag shadow up slightly because the apps are at the bottom edge of the
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// screen.
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touch.set(mIconSize / 2, mIconSize * 2 / 3);
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}
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@Override
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public void onDrawShadow(Canvas canvas) {
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// The Drawable's native bounds may be different than the source ImageView. Force it
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// to the correct size.
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Rect oldBounds = mDrawable.copyBounds();
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mDrawable.setBounds(0, 0, mIconSize, mIconSize);
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mDrawable.draw(canvas);
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mDrawable.setBounds(oldBounds);
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}
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}
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