Adding hardware layers to All Apps

- splitting up the "holo" outlines and the icons into separate views
- enabling hardware layers on each of the views

1 files changed, 164 insertions, 0 deletions

diff --git a/src/com/android/launcher2/PagedViewCellLayoutChildren.java b/src/com/android/launcher2/PagedViewCellLayoutChildren.java
new file mode 100644
index 000000000..46994f834
--- /dev/null
+++ b/src/com/android/launcher2/PagedViewCellLayoutChildren.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher2;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * An abstraction of the original CellLayout which supports laying out items
+ * which span multiple cells into a grid-like layout.  Also supports dimming
+ * to give a preview of its contents.
+ */
+public class PagedViewCellLayoutChildren extends ViewGroup {
+    static final String TAG = "PagedViewCellLayout";
+
+    private boolean mCenterContent;
+
+    private int mCellWidth;
+    private int mCellHeight;
+    private int mWidthGap;
+    private int mHeightGap;
+
+    public PagedViewCellLayoutChildren(Context context) {
+        super(context);
+        setLayerType(LAYER_TYPE_HARDWARE, null);
+    }
+
+    @Override
+    public void cancelLongPress() {
+        super.cancelLongPress();
+
+        // Cancel long press for all children
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            child.cancelLongPress();
+        }
+    }
+
+    public void setGap(int widthGap, int heightGap) {
+        mWidthGap = widthGap;
+        mHeightGap = heightGap;
+        requestLayout();
+    }
+
+    public void setCellDimensions(int width, int height) {
+        mCellWidth = width;
+        mCellHeight = height;
+        requestLayout();
+    }
+
+    @Override
+    public void requestChildFocus(View child, View focused) {
+        super.requestChildFocus(child, focused);
+        if (child != null) {
+            Rect r = new Rect();
+            child.getDrawingRect(r);
+            requestRectangleOnScreen(r);
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
+        int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
+
+        int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
+        int heightSpecSize =  MeasureSpec.getSize(heightMeasureSpec);
+
+        if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) {
+            throw new RuntimeException("CellLayout cannot have UNSPECIFIED dimensions");
+        }
+
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            PagedViewCellLayout.LayoutParams lp =
+                (PagedViewCellLayout.LayoutParams) child.getLayoutParams();
+            lp.setup(mCellWidth, mCellHeight, mWidthGap, mHeightGap,
+                    ((ViewGroup)getParent()).getPaddingLeft(),
+                    ((ViewGroup)getParent()).getPaddingTop());
+
+            int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(lp.width,
+                    MeasureSpec.EXACTLY);
+            int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(lp.height,
+                    MeasureSpec.EXACTLY);
+
+            child.measure(childWidthMeasureSpec, childheightMeasureSpec);
+        }
+
+        setMeasuredDimension(widthSpecSize, heightSpecSize);
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        int count = getChildCount();
+
+        int offsetX = 0;
+        if (mCenterContent) {
+            // determine the max width of all the rows and center accordingly
+            int maxRowWidth = 0;
+            for (int i = 0; i < count; i++) {
+                View child = getChildAt(i);
+                if (child.getVisibility() != GONE) {
+                    PagedViewCellLayout.LayoutParams lp =
+                        (PagedViewCellLayout.LayoutParams) child.getLayoutParams();
+                    maxRowWidth = Math.max(maxRowWidth, lp.x + lp.width);
+                }
+            }
+            offsetX = (getMeasuredWidth() / 2) - (maxRowWidth / 2);
+        }
+
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            if (child.getVisibility() != GONE) {
+                PagedViewCellLayout.LayoutParams lp =
+                    (PagedViewCellLayout.LayoutParams) child.getLayoutParams();
+
+                int childLeft = offsetX + lp.x;
+                int childTop = lp.y;
+                child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height);
+            }
+        }
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        return super.onTouchEvent(event) || true;
+    }
+
+    public void enableCenteredContent(boolean enabled) {
+        mCenterContent = enabled;
+    }
+
+    @Override
+    protected void setChildrenDrawingCacheEnabled(boolean enabled) {
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View view = getChildAt(i);
+            view.setDrawingCacheEnabled(enabled);
+            // Update the drawing caches
+            if (!view.isHardwareAccelerated()) {
+                view.buildDrawingCache(true);
+            }
+        }
+    }
+}