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/*
* Copyright (C) 2013 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.gallery3d.ingest.ui;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.mtp.MtpDevice;
import android.mtp.MtpObjectInfo;
import android.os.AsyncTask;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;
import android.widget.ImageView;
import com.android.gallery3d.R;
public class MtpThumbnailTileView extends ImageView implements Checkable {
private static final int FADE_IN_TIME_MS = 80;
private Paint mForegroundPaint;
private boolean mIsChecked;
private int mObjectHandle;
private int mGeneration;
private void init() {
mForegroundPaint = new Paint();
mForegroundPaint.setColor(getResources().getColor(R.color.ingest_highlight_semitransparent));
showPlaceholder();
}
public MtpThumbnailTileView(Context context) {
super(context);
init();
}
public MtpThumbnailTileView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public MtpThumbnailTileView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// Force this to be square
super.onMeasure(widthMeasureSpec, widthMeasureSpec);
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (mIsChecked) {
canvas.drawRect(canvas.getClipBounds(), mForegroundPaint);
}
}
@Override
public boolean isChecked() {
return mIsChecked;
}
@Override
public void setChecked(boolean checked) {
mIsChecked = checked;
}
@Override
public void toggle() {
setChecked(!mIsChecked);
}
private void showPlaceholder() {
setAlpha(0f);
}
private LoadThumbnailTask mTask;
public void setMtpDeviceAndObjectInfo(MtpDevice device, MtpObjectInfo object, int gen) {
int handle = object.getObjectHandle();
if (handle == mObjectHandle && gen == mGeneration) {
return;
}
animate().cancel();
if (mTask != null) {
mTask.cancel(true);
}
mGeneration = gen;
mObjectHandle = handle;
Bitmap thumbnail = MtpBitmapCache.getInstanceForDevice(device)
.get(handle);
if (thumbnail != null) {
setAlpha(1f);
setImageBitmap(thumbnail);
} else {
showPlaceholder();
mTask = new LoadThumbnailTask(device);
mTask.execute(object);
}
}
private class LoadThumbnailTask extends AsyncTask<MtpObjectInfo, Void, Bitmap> {
private MtpDevice mDevice;
public LoadThumbnailTask(MtpDevice device) {
mDevice = device;
}
@Override
protected Bitmap doInBackground(MtpObjectInfo... args) {
Bitmap result = null;
if (!isCancelled()) {
result = MtpBitmapCache.getInstanceForDevice(mDevice).getOrCreate(
args[0].getObjectHandle());
}
mDevice = null;
return result;
}
@Override
protected void onPostExecute(Bitmap result) {
if (isCancelled() || result == null) {
return;
}
setAlpha(0f);
setImageBitmap(result);
animate().alpha(1f).setDuration(FADE_IN_TIME_MS);
}
@Override
protected void onCancelled() {
}
}
}
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