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      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 
     71     public Cling(Context context) {
     72         this(context, null, 0);
     73     }
     74 
     75     public Cling(Context context, AttributeSet attrs) {
     76         this(context, attrs, 0);
     77     }
     78 
     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 
     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 
    112     void cleanup() {
    113         mBackground = null;
    114         mPunchThroughGraphic = null;
    115         mHandTouchGraphic = null;
    116         mIsInitialized = false;
    117     }
    118 
    119     public String getDrawIdentifier() {
    120         return mDrawIdentifier;
    121     }
    122 
    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
    142     public View focusSearch(int direction) {
    143         return this.focusSearch(this, direction);
    144     }
    145 
    146     @Override
    147     public View focusSearch(View focused, int direction) {
    148         return FocusFinder.getInstance().findNextFocus(this, focused, direction);
    149     }
    150 
    151     @Override
    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
    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
    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