commit b5ba097015c4794fa822f30b38a60a7070a00097
author Adam Cohen <adamcohen@google.com> Wed Sep 07 18:02:31 2011 -0700
committer Adam Cohen <adamcohen@google.com> Sun Sep 11 17:24:49 2011 -0700
tree c6cde4abffb777df40d00567836cd7117924f994
parent 09c1552341d76f9963eb18245887d86c4d00301f

Workspace overscroll effect

-> Made AllAppsCustomize scroll/over scroll more subtle

Change-Id: Icf1889b3adccce22d4a2d80c5b487518b0ab3157

src/com/android/launcher2/CellLayout.java

diff --git a/src/com/android/launcher2/CellLayout.java b/src/com/android/launcher2/CellLayout.java
index 667df8b..0d80d16 100644
--- a/src/com/android/launcher2/CellLayout.java
+++ b/src/com/android/launcher2/CellLayout.java
@@ -32,10 +32,13 @@
 import android.graphics.Paint;
 import android.graphics.Point;
 import android.graphics.PointF;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.Region;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.NinePatchDrawable;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
@@ -88,6 +91,7 @@
     private ArrayList<FolderRingAnimator> mFolderOuterRings = new ArrayList<FolderRingAnimator>();
     private int[] mFolderLeaveBehindCell = {-1, -1};
 
+    private int mForegroundAlpha = 0;
     private float mBackgroundAlpha;
     private float mBackgroundAlphaMultiplier = 1.0f;
 
@@ -98,10 +102,15 @@
     private Drawable mNormalGlowBackgroundMini;
     private Drawable mActiveBackgroundMini;
     private Drawable mActiveGlowBackgroundMini;
+    private Drawable mOverScrollForegroundDrawable;
+    private Drawable mOverScrollLeft;
+    private Drawable mOverScrollRight;
     private Rect mBackgroundRect;
+    private Rect mForegroundRect;
     private Rect mGlowBackgroundRect;
     private float mGlowBackgroundScale;
     private float mGlowBackgroundAlpha;
+    private int mForegroundPadding;
 
     private boolean mAcceptsDrops = true;
     // If we're actively dragging something over this screen, mIsDragOverlapping is true
@@ -180,6 +189,10 @@
         mNormalGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_blue_strong);
         mActiveBackgroundMini = res.getDrawable(R.drawable.homescreen_small_green);
         mActiveGlowBackgroundMini = res.getDrawable(R.drawable.homescreen_small_green_strong);
+        mOverScrollLeft = res.getDrawable(R.drawable.overscroll_glow_left);
+        mOverScrollRight = res.getDrawable(R.drawable.overscroll_glow_right);
+        mForegroundPadding =
+                res.getDimensionPixelSize(R.dimen.workspace_overscroll_drawable_padding);
 
         mNormalBackground.setFilterBitmap(true);
         mActiveBackground.setFilterBitmap(true);
@@ -261,6 +274,7 @@
         }
 
         mBackgroundRect = new Rect();
+        mForegroundRect = new Rect();
         mGlowBackgroundRect = new Rect();
         setHoverScale(1.0f);
         setHoverAlpha(1.0f);
@@ -311,6 +325,18 @@
                 icon.getBottom() + getPaddingTop() + padding);
     }
 
+    void setOverScrollAmount(float r, boolean left) {
+        if (left && mOverScrollForegroundDrawable != mOverScrollLeft) {
+            mOverScrollForegroundDrawable = mOverScrollLeft;
+        } else if (!left && mOverScrollForegroundDrawable != mOverScrollRight) {
+            mOverScrollForegroundDrawable = mOverScrollRight;
+        }
+
+        mForegroundAlpha = (int) Math.round((r * 255));
+        mOverScrollForegroundDrawable.setAlpha(mForegroundAlpha);
+        invalidate();
+    }
+
     void setPressedOrFocusedIcon(BubbleTextView icon) {
         // We draw the pressed or focused BubbleTextView's background in CellLayout because it
         // requires an expanded clip rect (due to the glow's blur radius)
@@ -577,6 +603,18 @@
         }
     }
 
+    @Override
+    protected void dispatchDraw(Canvas canvas) {
+        super.dispatchDraw(canvas);
+        if (mForegroundAlpha > 0) {
+            mOverScrollForegroundDrawable.setBounds(mForegroundRect);
+            Paint p = ((NinePatchDrawable) mOverScrollForegroundDrawable).getPaint();
+            p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.ADD));
+            mOverScrollForegroundDrawable.draw(canvas);
+            p.setXfermode(null);
+        }
+    }
+
     public void showFolderAccept(FolderRingAnimator fra) {
         mFolderOuterRings.add(fra);
     }
@@ -962,6 +1000,8 @@
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
         mBackgroundRect.set(0, 0, w, h);
+        mForegroundRect.set(mForegroundPadding, mForegroundPadding,
+                w - 2 * mForegroundPadding, h - 2 * mForegroundPadding);
         updateGlowRect();
     }