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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 com.android.launcher2.PagedView.PagedViewIconCache;
import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.Region.Op;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.widget.Checkable;
import android.widget.TextView;
/**
* An icon on a PagedView, specifically for items in the launcher's paged view (with compound
* drawables on the top).
*/
public class PagedViewIcon extends TextView implements Checkable {
private static final String TAG = "PagedViewIcon";
// holographic outline
private final Paint mPaint = new Paint();
private static HolographicOutlineHelper sHolographicOutlineHelper;
private Bitmap mCheckedOutline;
private Bitmap mHolographicOutline;
private Canvas mHolographicOutlineCanvas;
private boolean mIsHolographicUpdatePass;
private Rect mDrawableClipRect;
private Object mIconCacheKey;
private PagedViewIconCache mIconCache;
private int mAlpha;
private int mHolographicAlpha;
private boolean mIsChecked;
public PagedViewIcon(Context context) {
this(context, null);
}
public PagedViewIcon(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PagedViewIcon(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
if (sHolographicOutlineHelper == null) {
final Resources resources = context.getResources();
final DisplayMetrics metrics = resources.getDisplayMetrics();
final float density = metrics.density;
sHolographicOutlineHelper = new HolographicOutlineHelper(density);
}
mDrawableClipRect = new Rect();
setFocusable(true);
setBackgroundDrawable(null);
}
public void applyFromApplicationInfo(ApplicationInfo info, PagedViewIconCache cache) {
mIconCache = cache;
mIconCacheKey = info;
mHolographicOutline = mIconCache.getOutline(mIconCacheKey);
setCompoundDrawablesWithIntrinsicBounds(null,
new FastBitmapDrawable(info.iconBitmap), null, null);
setText(info.title);
setTag(info);
}
public void applyFromResolveInfo(ResolveInfo info, PackageManager packageManager,
PagedViewIconCache cache) {
mIconCache = cache;
mIconCacheKey = info;
mHolographicOutline = mIconCache.getOutline(mIconCacheKey);
Drawable image = info.loadIcon(packageManager);
image.setBounds(0, 0, image.getIntrinsicWidth(), image.getIntrinsicHeight());
setCompoundDrawablesWithIntrinsicBounds(null, image, null, null);
setText(info.loadLabel(packageManager));
setTag(info);
}
@Override
public void setAlpha(float alpha) {
final float viewAlpha = sHolographicOutlineHelper.viewAlphaInterpolator(alpha);
final float holographicAlpha = sHolographicOutlineHelper.highlightAlphaInterpolator(alpha);
mAlpha = (int) (viewAlpha * 255);
mHolographicAlpha = (int) (holographicAlpha * 255);
super.setAlpha(viewAlpha);
}
public void invalidateCheckedImage() {
if (mCheckedOutline != null) {
mCheckedOutline.recycle();
mCheckedOutline = null;
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mHolographicOutline == null) {
final PointF offset = new PointF(0,
-(getCompoundPaddingBottom() + getCompoundPaddingTop())/2.0f);
// update the clipping rect to be used in the holographic pass below
getDrawingRect(mDrawableClipRect);
mDrawableClipRect.bottom = getPaddingTop() + getCompoundPaddingTop();
// set a flag to indicate that we are going to draw the view at full alpha with the text
// clipped for the generation of the holographic icon
mIsHolographicUpdatePass = true;
mHolographicOutline = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
Bitmap.Config.ARGB_8888);
mHolographicOutlineCanvas = new Canvas(mHolographicOutline);
mHolographicOutlineCanvas.concat(getMatrix());
draw(mHolographicOutlineCanvas);
sHolographicOutlineHelper.setColor(HolographicOutlineHelper.HOLOGRAPHIC_BLUE);
sHolographicOutlineHelper.applyOutline(mHolographicOutline, mHolographicOutlineCanvas,
HolographicOutlineHelper.DEFAULT_STROKE_WIDTH, offset);
sHolographicOutlineHelper.applyBlur(mHolographicOutline, mHolographicOutlineCanvas);
mIsHolographicUpdatePass = false;
mIconCache.addOutline(mIconCacheKey, mHolographicOutline);
mHolographicOutlineCanvas = null;
}
}
@Override
protected void onDraw(Canvas canvas) {
// draw the view itself
if (mIsHolographicUpdatePass) {
// only clip to the text view (restore its alpha so that we get a proper outline)
canvas.save();
canvas.clipRect(mDrawableClipRect, Op.REPLACE);
final float alpha = getAlpha();
super.setAlpha(1.0f);
super.onDraw(canvas);
super.setAlpha(alpha);
canvas.restore();
} else {
if (mAlpha > 0) {
super.onDraw(canvas);
}
}
// draw any blended overlays
if (!mIsHolographicUpdatePass) {
if (mCheckedOutline == null) {
if (mHolographicOutline != null && mHolographicAlpha > 0) {
mPaint.setAlpha(mHolographicAlpha);
canvas.drawBitmap(mHolographicOutline, 0, 0, mPaint);
}
} else {
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) {
final PointF offset = new PointF(0,
-(getCompoundPaddingBottom() + getCompoundPaddingTop())/2.0f);
// set a flag to indicate that we are going to draw the view at full alpha with the text
// clipped for the generation of the holographic icon
mIsHolographicUpdatePass = true;
mCheckedOutline = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
Bitmap.Config.ARGB_8888);
mHolographicOutlineCanvas = new Canvas(mCheckedOutline);
mHolographicOutlineCanvas.concat(getMatrix());
draw(mHolographicOutlineCanvas);
sHolographicOutlineHelper.setColor(HolographicOutlineHelper.HOLOGRAPHIC_GREEN);
sHolographicOutlineHelper.applyOutline(mCheckedOutline, mHolographicOutlineCanvas,
HolographicOutlineHelper.DEFAULT_STROKE_WIDTH + 1.0f, offset);
mIsHolographicUpdatePass = false;
mHolographicOutlineCanvas = null;
} else {
invalidateCheckedImage();
}
invalidate();
}
}
@Override
public void toggle() {
setChecked(!mIsChecked);
}
}
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