1 /*
2  * Copyright (C) 2011 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 
17 package com.android.launcher2;
18 
19 import android.content.Context;
20 import android.content.res.Resources;
21 import android.content.res.TypedArray;
22 import android.graphics.Bitmap;
23 import android.graphics.Canvas;
24 import android.graphics.Paint;
25 import android.graphics.PorterDuff;
26 import android.graphics.PorterDuffXfermode;
27 import android.graphics.Rect;
28 import android.graphics.drawable.Drawable;
29 import android.util.AttributeSet;
30 import android.util.DisplayMetrics;
31 import android.view.FocusFinder;
32 import android.view.MotionEvent;
33 import android.view.View;
34 import android.widget.FrameLayout;
35 
36 import com.android.launcher.R;
37 
38 public class Cling extends FrameLayout {
39 
40     static final String WORKSPACE_CLING_DISMISSED_KEY = "cling.workspace.dismissed";
41     static final String ALLAPPS_CLING_DISMISSED_KEY = "cling.allapps.dismissed";
42     static final String FOLDER_CLING_DISMISSED_KEY = "cling.folder.dismissed";
43 
44     private static String WORKSPACE_PORTRAIT = "workspace_portrait";
45     private static String WORKSPACE_LANDSCAPE = "workspace_landscape";
46     private static String WORKSPACE_LARGE = "workspace_large";
47     private static String WORKSPACE_CUSTOM = "workspace_custom";
48 
49     private static String ALLAPPS_PORTRAIT = "all_apps_portrait";
50     private static String ALLAPPS_LANDSCAPE = "all_apps_landscape";
51     private static String ALLAPPS_LARGE = "all_apps_large";
52 
53     private static String FOLDER_PORTRAIT = "folder_portrait";
54     private static String FOLDER_LANDSCAPE = "folder_landscape";
55     private static String FOLDER_LARGE = "folder_large";
56 
57     private Launcher mLauncher;
58     private boolean mIsInitialized;
59     private String mDrawIdentifier;
60     private Drawable mBackground;
61     private Drawable mPunchThroughGraphic;
62     private Drawable mHandTouchGraphic;
63     private int mPunchThroughGraphicCenterRadius;
64     private int mAppIconSize;
65     private int mButtonBarHeight;
66     private float mRevealRadius;
67     private int[] mPositionData;
68 
69     private Paint mErasePaint;
70 
Cling(Context context)71     public Cling(Context context) {
72         this(context, null, 0);
73     }
74 
Cling(Context context, AttributeSet attrs)75     public Cling(Context context, AttributeSet attrs) {
76         this(context, attrs, 0);
77     }
78 
Cling(Context context, AttributeSet attrs, int defStyle)79     public Cling(Context context, AttributeSet attrs, int defStyle) {
80         super(context, attrs, defStyle);
81 
82         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Cling, defStyle, 0);
83         mDrawIdentifier = a.getString(R.styleable.Cling_drawIdentifier);
84         a.recycle();
85 
86         setClickable(true);
87     }
88 
init(Launcher l, int[] positionData)89     void init(Launcher l, int[] positionData) {
90         if (!mIsInitialized) {
91             mLauncher = l;
92             mPositionData = positionData;
93 
94             Resources r = getContext().getResources();
95 
96             mPunchThroughGraphic = r.getDrawable(R.drawable.cling);
97             mPunchThroughGraphicCenterRadius =
98                 r.getDimensionPixelSize(R.dimen.clingPunchThroughGraphicCenterRadius);
99             mAppIconSize = r.getDimensionPixelSize(R.dimen.app_icon_size);
100             mRevealRadius = r.getDimensionPixelSize(R.dimen.reveal_radius) * 1f;
101             mButtonBarHeight = r.getDimensionPixelSize(R.dimen.button_bar_height);
102 
103             mErasePaint = new Paint();
104             mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.MULTIPLY));
105             mErasePaint.setColor(0xFFFFFF);
106             mErasePaint.setAlpha(0);
107 
108             mIsInitialized = true;
109         }
110     }
111 
cleanup()112     void cleanup() {
113         mBackground = null;
114         mPunchThroughGraphic = null;
115         mHandTouchGraphic = null;
116         mIsInitialized = false;
117     }
118 
getDrawIdentifier()119     public String getDrawIdentifier() {
120         return mDrawIdentifier;
121     }
122 
getPunchThroughPositions()123     private int[] getPunchThroughPositions() {
124         if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT)) {
125             return new int[]{getMeasuredWidth() / 2, getMeasuredHeight() - (mButtonBarHeight / 2)};
126         } else if (mDrawIdentifier.equals(WORKSPACE_LANDSCAPE)) {
127             return new int[]{getMeasuredWidth() - (mButtonBarHeight / 2), getMeasuredHeight() / 2};
128         } else if (mDrawIdentifier.equals(WORKSPACE_LARGE)) {
129             final float scale = LauncherApplication.getScreenDensity();
130             final int cornerXOffset = (int) (scale * 15);
131             final int cornerYOffset = (int) (scale * 10);
132             return new int[]{getMeasuredWidth() - cornerXOffset, cornerYOffset};
133         } else if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
134                    mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
135                    mDrawIdentifier.equals(ALLAPPS_LARGE)) {
136             return mPositionData;
137         }
138         return new int[]{-1, -1};
139     }
140 
141     @Override
focusSearch(int direction)142     public View focusSearch(int direction) {
143         return this.focusSearch(this, direction);
144     }
145 
146     @Override
focusSearch(View focused, int direction)147     public View focusSearch(View focused, int direction) {
148         return FocusFinder.getInstance().findNextFocus(this, focused, direction);
149     }
150 
151     @Override
onHoverEvent(MotionEvent event)152     public boolean onHoverEvent(MotionEvent event) {
153         return (mDrawIdentifier.equals(WORKSPACE_PORTRAIT)
154                 || mDrawIdentifier.equals(WORKSPACE_LANDSCAPE)
155                 || mDrawIdentifier.equals(WORKSPACE_LARGE)
156                 || mDrawIdentifier.equals(ALLAPPS_PORTRAIT)
157                 || mDrawIdentifier.equals(ALLAPPS_LANDSCAPE)
158                 || mDrawIdentifier.equals(ALLAPPS_LARGE)
159                 || mDrawIdentifier.equals(WORKSPACE_CUSTOM));
160     }
161 
162     @Override
onTouchEvent(android.view.MotionEvent event)163     public boolean onTouchEvent(android.view.MotionEvent event) {
164         if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT) ||
165             mDrawIdentifier.equals(WORKSPACE_LANDSCAPE) ||
166             mDrawIdentifier.equals(WORKSPACE_LARGE) ||
167             mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
168             mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
169             mDrawIdentifier.equals(ALLAPPS_LARGE)) {
170 
171             int[] positions = getPunchThroughPositions();
172             for (int i = 0; i < positions.length; i += 2) {
173                 double diff = Math.sqrt(Math.pow(event.getX() - positions[i], 2) +
174                         Math.pow(event.getY() - positions[i + 1], 2));
175                 if (diff < mRevealRadius) {
176                     return false;
177                 }
178             }
179         } else if (mDrawIdentifier.equals(FOLDER_PORTRAIT) ||
180                    mDrawIdentifier.equals(FOLDER_LANDSCAPE) ||
181                    mDrawIdentifier.equals(FOLDER_LARGE)) {
182             Folder f = mLauncher.getWorkspace().getOpenFolder();
183             if (f != null) {
184                 Rect r = new Rect();
185                 f.getHitRect(r);
186                 if (r.contains((int) event.getX(), (int) event.getY())) {
187                     return false;
188                 }
189             }
190         }
191         return true;
192     };
193 
194     @Override
dispatchDraw(Canvas canvas)195     protected void dispatchDraw(Canvas canvas) {
196         if (mIsInitialized) {
197             DisplayMetrics metrics = new DisplayMetrics();
198             mLauncher.getWindowManager().getDefaultDisplay().getMetrics(metrics);
199 
200             // Initialize the draw buffer (to allow punching through)
201             Bitmap b = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
202                     Bitmap.Config.ARGB_8888);
203             Canvas c = new Canvas(b);
204 
205             // Draw the background
206             if (mBackground == null) {
207                 if (mDrawIdentifier.equals(WORKSPACE_PORTRAIT) ||
208                         mDrawIdentifier.equals(WORKSPACE_LANDSCAPE) ||
209                         mDrawIdentifier.equals(WORKSPACE_LARGE)) {
210                     mBackground = getResources().getDrawable(R.drawable.bg_cling1);
211                 } else if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
212                         mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
213                         mDrawIdentifier.equals(ALLAPPS_LARGE)) {
214                     mBackground = getResources().getDrawable(R.drawable.bg_cling2);
215                 } else if (mDrawIdentifier.equals(FOLDER_PORTRAIT) ||
216                         mDrawIdentifier.equals(FOLDER_LANDSCAPE)) {
217                     mBackground = getResources().getDrawable(R.drawable.bg_cling3);
218                 } else if (mDrawIdentifier.equals(FOLDER_LARGE)) {
219                     mBackground = getResources().getDrawable(R.drawable.bg_cling4);
220                 } else if (mDrawIdentifier.equals(WORKSPACE_CUSTOM)) {
221                     mBackground = getResources().getDrawable(R.drawable.bg_cling5);
222                 }
223             }
224             if (mBackground != null) {
225                 mBackground.setBounds(0, 0, getMeasuredWidth(), getMeasuredHeight());
226                 mBackground.draw(c);
227             } else {
228                 c.drawColor(0x99000000);
229             }
230 
231             int cx = -1;
232             int cy = -1;
233             float scale = mRevealRadius / mPunchThroughGraphicCenterRadius;
234             int dw = (int) (scale * mPunchThroughGraphic.getIntrinsicWidth());
235             int dh = (int) (scale * mPunchThroughGraphic.getIntrinsicHeight());
236 
237             // Determine where to draw the punch through graphic
238             int[] positions = getPunchThroughPositions();
239             for (int i = 0; i < positions.length; i += 2) {
240                 cx = positions[i];
241                 cy = positions[i + 1];
242                 if (cx > -1 && cy > -1) {
243                     c.drawCircle(cx, cy, mRevealRadius, mErasePaint);
244                     mPunchThroughGraphic.setBounds(cx - dw/2, cy - dh/2, cx + dw/2, cy + dh/2);
245                     mPunchThroughGraphic.draw(c);
246                 }
247             }
248 
249             // Draw the hand graphic in All Apps
250             if (mDrawIdentifier.equals(ALLAPPS_PORTRAIT) ||
251                 mDrawIdentifier.equals(ALLAPPS_LANDSCAPE) ||
252                 mDrawIdentifier.equals(ALLAPPS_LARGE)) {
253                 if (mHandTouchGraphic == null) {
254                     mHandTouchGraphic = getResources().getDrawable(R.drawable.hand);
255                 }
256                 int offset = mAppIconSize / 4;
257                 mHandTouchGraphic.setBounds(cx + offset, cy + offset,
258                         cx + mHandTouchGraphic.getIntrinsicWidth() + offset,
259                         cy + mHandTouchGraphic.getIntrinsicHeight() + offset);
260                 mHandTouchGraphic.draw(c);
261             }
262 
263             canvas.drawBitmap(b, 0, 0, null);
264             c.setBitmap(null);
265             b = null;
266         }
267 
268         // Draw the rest of the cling
269         super.dispatchDraw(canvas);
270     };
271 }
272