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/*
* Copyright (C) 2010 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.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;
import android.widget.LinearLayout;
import com.android.launcher.R;
/**
* An widget icon for use specifically in the CustomizePagedView. In class form so that
* we can add logic for how it will look when checked/unchecked.
*/
public class PagedViewWidgetIcon extends LinearLayout implements Checkable {
private static final String TAG = "PagedViewIcon";
// Holographic outline
private final Paint mPaint = new Paint();
private static HolographicOutlineHelper sHolographicOutlineHelper;
private final Paint mErasePaint = new Paint();
private Bitmap mCheckedOutline;
private Canvas mHolographicOutlineCanvas;
private boolean mIsHolographicUpdatePass;
private int mAlpha;
private boolean mIsChecked;
// Highlight colours
private int mCheckedBlurColor;
private int mCheckedOutlineColor;
public PagedViewWidgetIcon(Context context) {
this(context, null);
}
public PagedViewWidgetIcon(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PagedViewWidgetIcon(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PagedViewWidgetIcon,
defStyle, 0);
mCheckedBlurColor = a.getColor(R.styleable.PagedViewWidgetIcon_checkedBlurColor, 0);
mCheckedOutlineColor = a.getColor(R.styleable.PagedViewWidgetIcon_checkedOutlineColor, 0);
mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
mErasePaint.setFilterBitmap(true);
a.recycle();
if (sHolographicOutlineHelper == null) {
sHolographicOutlineHelper = new HolographicOutlineHelper();
}
setWillNotDraw(false);
}
public void invalidateCheckedImage() {
if (mCheckedOutline != null) {
mCheckedOutline.recycle();
mCheckedOutline = null;
}
}
@Override
protected void onDraw(Canvas canvas) {
// Draw the view itself
if (mIsHolographicUpdatePass) {
canvas.save();
final float alpha = getAlpha();
super.setAlpha(1.0f);
super.onDraw(canvas);
super.setAlpha(alpha);
canvas.restore();
} else {
if (mAlpha > 0) {
super.onDraw(canvas);
}
}
// Draw the holographic checked overlay if necessary
if (!mIsHolographicUpdatePass) {
if (mCheckedOutline != null) {
mPaint.setAlpha(255);
canvas.drawBitmap(mCheckedOutline, 0, 0, mPaint);
}
}
}
@Override
public boolean isChecked() {
return mIsChecked;
}
@Override
public void setChecked(boolean checked) {
if (mIsChecked != checked) {
mIsChecked = checked;
if (mIsChecked) {
// set a flag to indicate that we are going to draw the view at full alpha
mIsHolographicUpdatePass = true;
final int width = getMeasuredWidth();
final int height = getMeasuredHeight();
mCheckedOutline = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
mHolographicOutlineCanvas = new Canvas(mCheckedOutline);
mHolographicOutlineCanvas.concat(getMatrix());
draw(mHolographicOutlineCanvas);
sHolographicOutlineHelper.applyExpensiveOutlineWithBlur(mCheckedOutline,
mHolographicOutlineCanvas, mCheckedBlurColor, mCheckedOutlineColor);
// Unlike PagedViewIcon, we can't seem to properly set the clip rect for all the
// children to respect when drawing... so for now, we erase over those parts in the
// checked highlight image
mHolographicOutlineCanvas.drawRect(0, findViewById(R.id.divider).getTop(),
width, height, mErasePaint);
mIsHolographicUpdatePass = false;
mHolographicOutlineCanvas = null;
} else {
invalidateCheckedImage();
}
invalidate();
}
}
@Override
public void toggle() {
setChecked(!mIsChecked);
}
}
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