PagedViewWidget.java revision fd3385fe9e0f034b04f99d5d59a58d74fe040da4 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.launcher2;
18
19import android.animation.ObjectAnimator;
20import android.appwidget.AppWidgetProviderInfo;
21import android.content.Context;
22import android.content.pm.PackageManager;
23import android.content.pm.ResolveInfo;
24import android.content.res.Resources;
25import android.content.res.TypedArray;
26import android.graphics.Bitmap;
27import android.graphics.Canvas;
28import android.graphics.Color;
29import android.graphics.Paint;
30import android.graphics.PorterDuff;
31import android.graphics.PorterDuff.Mode;
32import android.graphics.PorterDuffXfermode;
33import android.graphics.Rect;
34import android.graphics.RectF;
35import android.os.Handler;
36import android.os.HandlerThread;
37import android.os.Message;
38import android.util.AttributeSet;
39import android.view.KeyEvent;
40import android.view.MotionEvent;
41import android.view.View;
42import android.widget.Checkable;
43import android.widget.ImageView;
44import android.widget.LinearLayout;
45import android.widget.TextView;
46
47import com.android.launcher.R;
48
49/**
50 * The linear layout used strictly for the widget/wallpaper tab of the customization tray
51 */
52public class PagedViewWidget extends LinearLayout implements Checkable {
53    static final String TAG = "PagedViewWidgetLayout";
54
55    private final Paint mPaint = new Paint();
56    private Bitmap mHolographicOutline;
57    private HolographicOutlineHelper mHolographicOutlineHelper;
58    private ImageView mPreviewImageView;
59    private final RectF mTmpScaleRect = new RectF();
60
61    private String mDimensionsFormatString;
62
63    private int mAlpha = 255;
64    private int mHolographicAlpha;
65
66    private boolean mIsChecked;
67    private ObjectAnimator mCheckedAlphaAnimator;
68    private float mCheckedAlpha = 1.0f;
69    private int mCheckedFadeInDuration;
70    private int mCheckedFadeOutDuration;
71
72    public PagedViewWidget(Context context) {
73        this(context, null);
74    }
75
76    public PagedViewWidget(Context context, AttributeSet attrs) {
77        this(context, attrs, 0);
78    }
79
80    public PagedViewWidget(Context context, AttributeSet attrs, int defStyle) {
81        super(context, attrs, defStyle);
82
83        // Set up fade in/out constants
84        final Resources r = context.getResources();
85        final int alpha = r.getInteger(R.integer.config_dragAppsCustomizeIconFadeAlpha);
86        if (alpha > 0) {
87            mCheckedAlpha = r.getInteger(R.integer.config_dragAppsCustomizeIconFadeAlpha) / 256.0f;
88            mCheckedFadeInDuration =
89                r.getInteger(R.integer.config_dragAppsCustomizeIconFadeInDuration);
90            mCheckedFadeOutDuration =
91                r.getInteger(R.integer.config_dragAppsCustomizeIconFadeOutDuration);
92        }
93        mDimensionsFormatString = r.getString(R.string.widget_dims_format);
94
95        setWillNotDraw(false);
96        setClipToPadding(false);
97    }
98
99    public void applyFromAppWidgetProviderInfo(AppWidgetProviderInfo info,
100            FastBitmapDrawable preview, int maxWidth, int[] cellSpan,
101            HolographicOutlineHelper holoOutlineHelper) {
102        mHolographicOutlineHelper = holoOutlineHelper;
103        final ImageView image = (ImageView) findViewById(R.id.widget_preview);
104        if (maxWidth > -1) {
105            image.setMaxWidth(maxWidth);
106        }
107        image.setImageDrawable(preview);
108        mPreviewImageView = image;
109        final TextView name = (TextView) findViewById(R.id.widget_name);
110        name.setText(info.label);
111        name.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
112        final TextView dims = (TextView) findViewById(R.id.widget_dims);
113        dims.setText(String.format(mDimensionsFormatString, cellSpan[0], cellSpan[1]));
114        dims.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
115    }
116
117    public void applyFromResolveInfo(PackageManager pm, ResolveInfo info,
118            FastBitmapDrawable preview, HolographicOutlineHelper holoOutlineHelper) {
119        mHolographicOutlineHelper = holoOutlineHelper;
120        final ImageView image = (ImageView) findViewById(R.id.widget_preview);
121        image.setImageDrawable(preview);
122        mPreviewImageView = image;
123        final TextView name = (TextView) findViewById(R.id.widget_name);
124        name.setText(info.loadLabel(pm));
125        name.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
126        final TextView dims = (TextView) findViewById(R.id.widget_dims);
127        if (dims != null) {
128            dims.setText(String.format(mDimensionsFormatString, 1, 1));
129            dims.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
130        }
131    }
132
133    public void setHolographicOutline(Bitmap holoOutline) {
134        mHolographicOutline = holoOutline;
135        invalidate();
136    }
137
138    @Override
139    public boolean onTouchEvent(MotionEvent event) {
140        // We eat up the touch events here, since the PagedView (which uses the same swiping
141        // touch code as Workspace previously) uses onInterceptTouchEvent() to determine when
142        // the user is scrolling between pages.  This means that if the pages themselves don't
143        // handle touch events, it gets forwarded up to PagedView itself, and it's own
144        // onTouchEvent() handling will prevent further intercept touch events from being called
145        // (it's the same view in that case).  This is not ideal, but to prevent more changes,
146        // we just always mark the touch event as handled.
147        return super.onTouchEvent(event) || true;
148    }
149
150    @Override
151    public boolean onKeyDown(int keyCode, KeyEvent event) {
152        return FocusHelper.handlePagedViewGridLayoutWidgetKeyEvent(this, keyCode, event)
153                || super.onKeyDown(keyCode, event);
154    }
155
156    @Override
157    public boolean onKeyUp(int keyCode, KeyEvent event) {
158        return FocusHelper.handlePagedViewGridLayoutWidgetKeyEvent(this, keyCode, event)
159                || super.onKeyUp(keyCode, event);
160    }
161
162    @Override
163    protected void onDraw(Canvas canvas) {
164        if (mAlpha > 0) {
165            super.onDraw(canvas);
166        }
167
168        // draw any blended overlays
169        if (mHolographicOutline != null && mHolographicAlpha > 0) {
170            // Calculate how much to scale the holographic preview
171            mTmpScaleRect.set(0,0,1,1);
172            mPreviewImageView.getImageMatrix().mapRect(mTmpScaleRect);
173
174            mPaint.setAlpha(mHolographicAlpha);
175            canvas.save();
176            canvas.scale(mTmpScaleRect.right, mTmpScaleRect.bottom);
177            canvas.drawBitmap(mHolographicOutline, mPreviewImageView.getLeft(),
178                    mPreviewImageView.getTop(), mPaint);
179            canvas.restore();
180        }
181    }
182
183    @Override
184    protected boolean onSetAlpha(int alpha) {
185        return true;
186    }
187
188    private void setChildrenAlpha(float alpha) {
189        final int childCount = getChildCount();
190        for (int i = 0; i < childCount; i++) {
191            getChildAt(i).setAlpha(alpha);
192        }
193    }
194    @Override
195    public void setAlpha(float alpha) {
196        final float viewAlpha = mHolographicOutlineHelper.viewAlphaInterpolator(alpha);
197        final float holographicAlpha = mHolographicOutlineHelper.highlightAlphaInterpolator(alpha);
198        int newViewAlpha = (int) (viewAlpha * 255);
199        int newHolographicAlpha = (int) (holographicAlpha * 255);
200        if ((mAlpha != newViewAlpha) || (mHolographicAlpha != newHolographicAlpha)) {
201            mAlpha = newViewAlpha;
202            mHolographicAlpha = newHolographicAlpha;
203            setChildrenAlpha(viewAlpha);
204            super.setAlpha(viewAlpha);
205        }
206    }
207
208    void setChecked(boolean checked, boolean animate) {
209        if (mIsChecked != checked) {
210            mIsChecked = checked;
211
212            float alpha;
213            int duration;
214            if (mIsChecked) {
215                alpha = mCheckedAlpha;
216                duration = mCheckedFadeInDuration;
217            } else {
218                alpha = 1.0f;
219                duration = mCheckedFadeOutDuration;
220            }
221
222            // Initialize the animator
223            if (mCheckedAlphaAnimator != null) {
224                mCheckedAlphaAnimator.cancel();
225            }
226            if (animate) {
227                mCheckedAlphaAnimator = ObjectAnimator.ofFloat(this, "alpha", getAlpha(), alpha);
228                mCheckedAlphaAnimator.setDuration(duration);
229                mCheckedAlphaAnimator.start();
230            } else {
231                setAlpha(alpha);
232            }
233
234            invalidate();
235        }
236    }
237
238    @Override
239    public void setChecked(boolean checked) {
240        setChecked(checked, true);
241    }
242
243    @Override
244    public boolean isChecked() {
245        return mIsChecked;
246    }
247
248    @Override
249    public void toggle() {
250        setChecked(!mIsChecked);
251    }
252}
253