Click on icons.
diff --git a/src/com/android/launcher2/AllAppsView.java b/src/com/android/launcher2/AllAppsView.java
index d8ac50b..b9ec2cf 100644
--- a/src/com/android/launcher2/AllAppsView.java
+++ b/src/com/android/launcher2/AllAppsView.java
@@ -39,6 +39,7 @@
 import android.database.DataSetObserver;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.BlurMaskFilter;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.drawable.BitmapDrawable;
@@ -53,37 +54,61 @@
 import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
+import android.view.View;
 import android.view.VelocityTracker;
 import android.view.ViewConfiguration;
 import android.graphics.PixelFormat;
 
 
-public class AllAppsView extends RSSurfaceView {
+public class AllAppsView extends RSSurfaceView
+        implements View.OnClickListener, View.OnLongClickListener {
     private static final String TAG = "Launcher.AllAppsView";
 
+    private Launcher mLauncher;
+
     private RenderScript mRS;
     private RolloRS mRollo;
     private ArrayList<ApplicationInfo> mAllAppsList;
 
     private ViewConfiguration mConfig;
     private int mPageCount;
+    private boolean mStartedScrolling;
     private VelocityTracker mVelocity;
     private int mLastScrollX;
     private int mLastMotionX;
-    private ApplicationsAdapter mAdapter;
     private TouchHandler mTouchHandler;
     private int mScrollHandleTop;
 
-    class Defines {
+    static class Defines {
+        private static float farSize(float sizeAt0) {
+            return sizeAt0 * (Defines.RADIUS - Defines.CAMERA_Z) / -Defines.CAMERA_Z;
+        }
+
         public static final int ALLOC_PARAMS = 0;
         public static final int ALLOC_STATE = 1;
-        public static final int ALLOC_SCRATCH = 2;
-        public static final int ALLOC_ICON_IDS = 3;
-        public static final int ALLOC_LABEL_IDS = 4;
+        public static final int ALLOC_ICON_IDS = 2;
+        public static final int ALLOC_LABEL_IDS = 3;
+        public static final int ALLOC_X_BORDERS = 4;
+        public static final int ALLOC_Y_BORDERS = 5;
 
         public static final int COLUMNS_PER_PAGE = 4;
         public static final int ROWS_PER_PAGE = 4;
         
+        public static final float RADIUS = 4.0f;
+
+        public static final int SCREEN_WIDTH_PX = 480;
+        public static final int SCREEN_HEIGHT_PX = 854;
+
+        public static final int ICON_WIDTH_PX = 64;
+        public static final int ICON_TEXTURE_WIDTH_PX = 128;
+
+        public static final int ICON_HEIGHT_PX = 64;
+        public static final int ICON_TEXTURE_HEIGHT_PX = 128;
+        public static final float ICON_TOP_OFFSET = 0.2f;
+
+        public static final float CAMERA_Z = -2;
+        public static final float FAR_ICON_SIZE
+                = farSize(2 * ICON_WIDTH_PX / (float)SCREEN_WIDTH_PX);
     }
 
     public AllAppsView(Context context, AttributeSet attrs) {
@@ -91,36 +116,38 @@
         setFocusable(true);
         getHolder().setFormat(PixelFormat.TRANSLUCENT);
         mConfig = ViewConfiguration.get(context);
+        setOnClickListener(this);
+        setOnLongClickListener(this);
     }
 
     public AllAppsView(Context context, AttributeSet attrs, int defStyle) {
         this(context, attrs);
     }
 
-    void setAdapter(ApplicationsAdapter adapter) {
-        if (mAdapter != null) {
-            mAdapter.unregisterDataSetObserver(mIconObserver);
-        }
-        mAdapter = adapter;
-        if (adapter != null) {
-            adapter.registerDataSetObserver(mIconObserver);
-        }
+    public void setLauncher(Launcher launcher) {
+        mLauncher = launcher;
     }
 
     @Override
     public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
         super.surfaceChanged(holder, format, w, h);
 
+        long startTime = SystemClock.uptimeMillis();
+
         mRS = createRenderScript(true);
         mRollo = new RolloRS();
         mRollo.init(getResources(), w, h);
         if (mAllAppsList != null) {
             mRollo.setApps(mAllAppsList);
+            Log.d(TAG, "surfaceChanged... calling mRollo.setApps");
         }
 
         Resources res = getContext().getResources();
         int barHeight = (int)res.getDimension(R.dimen.button_bar_height);
         mScrollHandleTop = h - barHeight;
+
+        long endTime = SystemClock.uptimeMillis();
+        Log.d(TAG, "surfaceChanged took " + (endTime-startTime) + "ms");
     }
 
     @Override
@@ -133,6 +160,8 @@
     @Override
     public boolean onTouchEvent(MotionEvent ev)
     {
+        super.onTouchEvent(ev);
+
         mTouchHandler = mFlingHandler;
         /*
         int action = ev.getAction();
@@ -144,7 +173,9 @@
             }
         }
         */
-        return mTouchHandler.onTouchEvent(ev);
+        mTouchHandler.onTouchEvent(ev);
+
+        return true;
     }
 
     private abstract class TouchHandler {
@@ -161,22 +192,38 @@
                 case MotionEvent.ACTION_DOWN:
                     mLastMotionX = x;
                     mRollo.mState.read();
-                    mRollo.mState.scrollX = mLastScrollX = mRollo.mState.currentScrollX;
+                    mRollo.mState.startScrollX = mRollo.mState.scrollX = mLastScrollX
+                            = mRollo.mState.currentScrollX;
+                    if (mRollo.mState.flingVelocityX != 0) {
+                        mRollo.clearSelectedIcon();
+                    } else {
+                        mRollo.selectIcon(x, (int)ev.getY(), mRollo.mState.startScrollX,
+                                (-mRollo.mState.startScrollX / Defines.SCREEN_WIDTH_PX));
+                    }
                     mRollo.mState.flingVelocityX = 0;
                     mRollo.mState.adjustedDeceleration = 0;
                     mRollo.mState.save();
                     mVelocity = VelocityTracker.obtain();
                     mVelocity.addMovement(ev);
+                    mStartedScrolling = false;
                     break;
                 case MotionEvent.ACTION_MOVE:
                 case MotionEvent.ACTION_OUTSIDE:
-                    deltaX = x - mLastMotionX;
-                    mVelocity.addMovement(ev);
-                    mRollo.mState.currentScrollX = mLastScrollX;
-                    mLastScrollX += deltaX;
-                    mRollo.mState.scrollX = mLastScrollX;
-                    mRollo.mState.save();
-                    mLastMotionX = x;
+                    int slop = Math.abs(x - mLastMotionX);
+                    if (!mStartedScrolling && slop < mConfig.getScaledTouchSlop()) {
+                        // don't update mLastMotionX so slop is right and when we do start scrolling
+                        // below, we get the right delta.
+                    } else {
+                        mStartedScrolling = true;
+                        mRollo.clearSelectedIcon();
+                        deltaX = x - mLastMotionX;
+                        mVelocity.addMovement(ev);
+                        mRollo.mState.currentScrollX = mLastScrollX;
+                        mLastScrollX += deltaX;
+                        mRollo.mState.scrollX = mLastScrollX;
+                        mRollo.mState.save();
+                        mLastMotionX = x;
+                    }
                     break;
                 case MotionEvent.ACTION_UP:
                 case MotionEvent.ACTION_CANCEL:
@@ -184,6 +231,7 @@
                             mConfig.getScaledMaximumFlingVelocity());
                     mRollo.mState.flingTimeMs = (int)SystemClock.uptimeMillis(); // TODO: use long
                     mRollo.mState.flingVelocityX = (int)mVelocity.getXVelocity();
+                    mRollo.clearSelectedIcon();
                     mRollo.mState.save();
                     mLastMotionX = -10000;
                     mVelocity.recycle();
@@ -194,6 +242,20 @@
         }
     };
 
+    public void onClick(View v) {
+        int index = mRollo.mState.selectedIconIndex;
+        if (mRollo.mState.flingVelocityX == 0 && index >= 0 && index < mAllAppsList.size()) {
+            ApplicationInfo app = mAllAppsList.get(index);
+            mLauncher.startActivitySafely(app.intent);
+        }
+    }
+
+    public boolean onLongClick(View v) {
+        Log.d(TAG, "long click! velocity=" + mRollo.mState.flingVelocityX + " index="
+                + mRollo.mState.selectedIconIndex);
+        return true;
+    }
+
     /*
     private TouchHandler mScrollHandler = new TouchHandler() {
         @Override
@@ -229,18 +291,17 @@
         return true;
     }
 
-    DataSetObserver mIconObserver = new DataSetObserver() {
-        public void onChanged() {
-            Log.d(TAG, "new icons arrived! now have " + mAdapter.getCount());
-        }
-    };
-
     public void setApps(ArrayList<ApplicationInfo> list) {
         mAllAppsList = list;
         if (mRollo != null) {
             mRollo.setApps(list);
         }
         mPageCount = countPages(list.size());
+        Log.d(TAG, "setApps mRollo=" + mRollo + " list=" + list);
+    }
+
+    private void invokeIcon(int index) {
+        Log.d(TAG, "launch it!!!! index=" + index);
     }
 
     private static int countPages(int iconCount) {
@@ -276,15 +337,20 @@
         private Allocation mScrollHandle;
 
         private Allocation[] mIcons;
-        private int[] mAllocIconIDBuf;
+        private int[] mIconIds;
         private Allocation mAllocIconID;
 
         private Allocation[] mLabels;
-        private int[] mAllocLabelIDBuf;
+        private int[] mLabelIds;
         private Allocation mAllocLabelID;
+        private Allocation mSelectedIcon;
 
-        private int[] mAllocScratchBuf;
-        private Allocation mAllocScratch;
+        private int[] mTouchYBorders;
+        private Allocation mAllocTouchYBorders;
+        private int[] mTouchXBorders;
+        private Allocation mAllocTouchXBorders;
+
+        private Bitmap mSelectionBitmap;
 
         Params mParams;
         State mState;
@@ -314,7 +380,9 @@
             @AllocationIndex(5) public int currentScrollX;
             @AllocationIndex(6) public int flingDuration;
             @AllocationIndex(7) public int flingEndPos;
-            @AllocationIndex(8) public int scrollHandlePos;
+            @AllocationIndex(8) public int startScrollX;
+            @AllocationIndex(9) public int selectedIconIndex = -1;
+            @AllocationIndex(10) public int selectedIconTexture;
         }
 
         public RolloRS() {
@@ -326,6 +394,7 @@
             mHeight = height;
             initGl();
             initData();
+            initTouchState();
             initRs();
         }
 
@@ -353,7 +422,8 @@
             mPFImages.bindSampler(mSampler, 0);
 
             bf.setTexEnvMode(ProgramFragment.EnvMode.MODULATE, 0);
-            mPFText = bf.create();
+            //mPFText = bf.create();
+            mPFText = (new ProgramFragment.Builder(mRS, null, null)).create();
             mPFText.setName("PFText");
             mPFText.bindSampler(mSamplerText, 0);
 
@@ -391,9 +461,15 @@
 
             mRS.contextBindProgramVertex(mPV);
 
-            mAllocScratchBuf = new int[32];
-            mAllocScratch = Allocation.createSized(mRS, Element.USER_I32, mAllocScratchBuf.length);
-            mAllocScratch.data(mAllocScratchBuf);
+            mTouchXBorders = new int[Defines.COLUMNS_PER_PAGE+1];
+            mAllocTouchXBorders = Allocation.createSized(mRS, Element.USER_I32,
+                    mTouchXBorders.length);
+            mAllocTouchXBorders.data(mTouchXBorders);
+
+            mTouchYBorders = new int[Defines.ROWS_PER_PAGE+1];
+            mAllocTouchYBorders = Allocation.createSized(mRS, Element.USER_I32,
+                    mTouchYBorders.length);
+            mAllocTouchYBorders.data(mTouchYBorders);
 
             Log.e("rs", "Done loading named");
         }
@@ -410,17 +486,33 @@
             mParams.bubbleBitmapHeight = bubble.getBitmapHeight();
 
             mScrollHandle = Allocation.createFromBitmapResource(mRS, mRes,
-                    R.drawable.all_apps_button_pow2, Element.RGBA_8888, true);
+                    R.drawable.all_apps_button_pow2, Element.RGBA_8888, false);
             mScrollHandle.uploadToTexture(0);
             mParams.scrollHandleId = mScrollHandle.getID();
             Log.d(TAG, "mParams.scrollHandleId=" + mParams.scrollHandleId);
             mParams.scrollHandleTextureWidth = 128;
             mParams.scrollHandleTextureHeight = 128;
-            mState.scrollHandlePos = 0;
+
 
             mParams.save();
             mState.save();
 
+            mSelectionBitmap = Bitmap.createBitmap(Defines.ICON_WIDTH_PX, Defines.ICON_HEIGHT_PX,
+                    Bitmap.Config.ARGB_8888);
+            Bitmap selectionBitmap = mSelectionBitmap;
+            Paint paint = new Paint();
+            float radius = 12 * getContext().getResources().getDisplayMetrics().density;
+            //paint.setMaskFilter(new BlurMaskFilter(radius, BlurMaskFilter.Blur.OUTER));
+            Canvas canvas = new Canvas(selectionBitmap);
+            canvas.drawColor(0xffff0000);
+
+            mSelectedIcon = Allocation.createFromBitmap(mRS, selectionBitmap,
+                    Element.RGBA_8888, false);
+            mSelectedIcon.uploadToTexture(0);
+
+            mState.selectedIconTexture = mSelectedIcon.getID();
+
+            Log.d(TAG, "initData calling mRollo.setApps");
             setApps(null);
         }
 
@@ -435,8 +527,9 @@
             mScript.bindAllocation(mParams.getAllocation(), Defines.ALLOC_PARAMS);
             mScript.bindAllocation(mState.getAllocation(), Defines.ALLOC_STATE);
             mScript.bindAllocation(mAllocIconID, Defines.ALLOC_ICON_IDS);
-            mScript.bindAllocation(mAllocScratch, Defines.ALLOC_SCRATCH);
             mScript.bindAllocation(mAllocLabelID, Defines.ALLOC_LABEL_IDS);
+            mScript.bindAllocation(mAllocTouchXBorders, Defines.ALLOC_X_BORDERS);
+            mScript.bindAllocation(mAllocTouchYBorders, Defines.ALLOC_Y_BORDERS);
 
             mRS.contextBindRootScript(mScript);
         }
@@ -444,11 +537,11 @@
         private void setApps(ArrayList<ApplicationInfo> list) {
             final int count = list != null ? list.size() : 0;
             mIcons = new Allocation[count];
-            mAllocIconIDBuf = new int[count];
+            mIconIds = new int[count];
             mAllocIconID = Allocation.createSized(mRS, Element.USER_I32, count);
 
             mLabels = new Allocation[count];
-            mAllocLabelIDBuf = new int[count];
+            mLabelIds = new int[count];
             mAllocLabelID = Allocation.createSized(mRS, Element.USER_I32, count);
 
             Element ie8888 = Element.RGBA_8888;
@@ -459,19 +552,19 @@
                 final ApplicationInfo item = list.get(i);
 
                 mIcons[i] = Allocation.createFromBitmap(mRS, item.iconBitmap,
-                        Element.RGBA_8888, true);
+                        Element.RGBA_8888, false);
                 mLabels[i] = Allocation.createFromBitmap(mRS, item.titleBitmap,
-                        Element.RGBA_8888, true);
+                        Element.RGBA_8888, false);
 
                 mIcons[i].uploadToTexture(0);
                 mLabels[i].uploadToTexture(0);
 
-                mAllocIconIDBuf[i] = mIcons[i].getID();
-                mAllocLabelIDBuf[i] = mLabels[i].getID();
+                mIconIds[i] = mIcons[i].getID();
+                mLabelIds[i] = mLabels[i].getID();
             }
 
-            mAllocIconID.data(mAllocIconIDBuf);
-            mAllocLabelID.data(mAllocLabelIDBuf);
+            mAllocIconID.data(mIconIds);
+            mAllocLabelID.data(mLabelIds);
 
             mState.iconCount = count;
 
@@ -484,6 +577,84 @@
 
             mState.save();
         }
+
+        void initTouchState() {
+            int width = getWidth();
+            int height = getHeight();
+
+            int iconsSize;
+            if (width < height) {
+                iconsSize = width;
+            } else {
+                iconsSize = height;
+            }
+            int cellHeight = iconsSize / Defines.ROWS_PER_PAGE;
+            int cellWidth = iconsSize / Defines.COLUMNS_PER_PAGE;
+
+            int centerY = (height / 2) - (int)(cellHeight * 0.35f);
+            mTouchYBorders[0] = centerY - (int)(2.4f * cellHeight);
+            mTouchYBorders[1] = centerY - (int)(1.15f * cellHeight);
+            mTouchYBorders[2] = centerY;
+            mTouchYBorders[3] = centerY + (int)(1.15f * cellHeight);;
+            mTouchYBorders[4] = centerY + (int)(2.4f * cellHeight);
+
+            mAllocTouchYBorders.data(mTouchYBorders);
+            
+            int centerX = (width / 2);
+            mTouchXBorders[0] = centerX - (2 * cellWidth);
+            mTouchXBorders[1] = centerX - (int)(0.83f * cellWidth);;
+            mTouchXBorders[2] = centerX;
+            mTouchXBorders[3] = centerX + (int)(0.83f * cellWidth);;
+            mTouchXBorders[4] = centerX + (2 * cellWidth);
+
+            mAllocTouchXBorders.data(mTouchXBorders);
+        }
+
+        int chooseTappedIcon(int x, int y, int scrollX, int currentPage) {
+            int col = -1;
+            int row = -1;
+
+            for (int i=0; i<Defines.COLUMNS_PER_PAGE; i++) {
+                if (x >= mTouchXBorders[i] && x < mTouchXBorders[i+1]) {
+                    col = i;
+                    break;
+                }
+            }
+            for (int i=0; i<Defines.ROWS_PER_PAGE; i++) {
+                if (y >= mTouchYBorders[i] && y < mTouchYBorders[i+1]) {
+                    row = i;
+                    break;
+                }
+            }
+
+            if (row < 0 || col < 0) {
+                return -1;
+            }
+
+            return (currentPage * Defines.ROWS_PER_PAGE * Defines.COLUMNS_PER_PAGE) 
+                    + (row * Defines.ROWS_PER_PAGE) + col;
+        }
+
+        /**
+         * You need to call save() on mState on your own after calling this.
+         */
+        void selectIcon(int x, int y, int scrollX, int currentPage) {
+            int iconCount = mAllAppsList.size();
+            int index = chooseTappedIcon(x, y, scrollX, currentPage);
+            if (index < 0 || index >= iconCount) {
+                mState.selectedIconIndex = -1;
+                return;
+            } else {
+                mState.selectedIconIndex = index;
+            }
+        }
+
+        /**
+         * You need to call save() on mState on your own after calling this.
+         */
+        void clearSelectedIcon() {
+            mState.selectedIconIndex = -1;
+        }
     }
 }