mirror of
https://github.com/LawnchairLauncher/lawnchair.git
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c06af333cb
- organizing imports - remove redundant modifiers on LauncherCallback interface - fix typos Change-Id: I61eb985cac7c1379b6b804a67d4f234386d3d1b4
98 lines
3.2 KiB
Java
98 lines
3.2 KiB
Java
/*
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* Copyright (C) 2016 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.launcher3.folder;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.PorterDuff;
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import android.graphics.Rect;
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import android.view.View;
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import android.widget.ImageView;
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import com.android.launcher3.Launcher;
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import com.android.launcher3.R;
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import com.android.launcher3.dragndrop.DragLayer;
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/**
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* A temporary view which displays the a bitmap (used for folder icon animation)
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*/
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public class PreviewImageView extends ImageView {
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private final Rect mTempRect = new Rect();
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private final DragLayer mParent;
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private Bitmap mBitmap;
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private Canvas mCanvas;
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public PreviewImageView(DragLayer parent) {
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super(parent.getContext());
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mParent = parent;
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}
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public void copy(View view) {
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final int width = view.getMeasuredWidth();
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final int height = view.getMeasuredHeight();
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if (mBitmap == null || mBitmap.getWidth() != width || mBitmap.getHeight() != height) {
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mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
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mCanvas = new Canvas(mBitmap);
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}
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DragLayer.LayoutParams lp;
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if (getLayoutParams() instanceof DragLayer.LayoutParams) {
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lp = (DragLayer.LayoutParams) getLayoutParams();
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} else {
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lp = new DragLayer.LayoutParams(width, height);
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}
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// The layout from which the folder is being opened may be scaled, adjust the starting
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// view size by this scale factor.
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float scale = mParent.getDescendantRectRelativeToSelf(view, mTempRect);
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lp.customPosition = true;
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lp.x = mTempRect.left;
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lp.y = mTempRect.top;
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lp.width = (int) (scale * width);
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lp.height = (int) (scale * height);
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mCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
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view.draw(mCanvas);
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setImageBitmap(mBitmap);
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// Just in case this image view is still in the drag layer from a previous animation,
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// we remove it and re-add it.
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removeFromParent();
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mParent.addView(this, lp);
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}
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public void removeFromParent() {
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if (mParent.indexOfChild(this) != -1) {
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mParent.removeView(this);
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}
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}
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public static PreviewImageView get(Context context) {
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DragLayer dragLayer = Launcher.getLauncher(context).getDragLayer();
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PreviewImageView view = (PreviewImageView) dragLayer.getTag(R.id.preview_image_id);
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if (view == null) {
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view = new PreviewImageView(dragLayer);
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dragLayer.setTag(R.id.preview_image_id, view);
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}
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return view;
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}
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}
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