4 files changed, 123 insertions, 1 deletions

diff --git a/src/com/android/browser/view/BasePieView.java b/src/com/android/browser/view/BasePieView.java
index 515545a..2120215 100644
--- a/src/com/android/browser/view/BasePieView.java
+++ b/src/com/android/browser/view/BasePieView.java
@@ -33,6 +33,8 @@ public abstract class BasePieView implements PieMenu.PieView {
     private DataSetObserver mObserver;
     protected ArrayList<View> mViews;
 
+    protected OnLayoutListener mListener;
+
     protected int mCurrent;
     protected int mChildWidth;
     protected int mChildHeight;
@@ -44,6 +46,10 @@ public abstract class BasePieView implements PieMenu.PieView {
     public BasePieView() {
     }
 
+    public void setLayoutListener(OnLayoutListener l) {
+        mListener = l;
+    }
+
     public void setAdapter(Adapter adapter) {
         mAdapter = adapter;
         if (adapter == null) {
@@ -103,7 +109,12 @@ public abstract class BasePieView implements PieMenu.PieView {
      * needs to set top, left, width, height
      */
     @Override
-    public abstract void layout(int anchorX, int anchorY, boolean left);
+    public void layout(int anchorX, int anchorY, boolean left) {
+        if (mListener != null) {
+            mListener.onLayout(anchorX, anchorY, left);
+        }
+    }
+
 
     @Override
     public abstract void draw(Canvas canvas);
diff --git a/src/com/android/browser/view/PieListView.java b/src/com/android/browser/view/PieListView.java
index 5fee51d..8cd8a4e 100644
--- a/src/com/android/browser/view/PieListView.java
+++ b/src/com/android/browser/view/PieListView.java
@@ -40,6 +40,7 @@ public class PieListView extends BasePieView {
      */
     @Override
     public void layout(int anchorX, int anchorY, boolean left) {
+        super.layout(anchorX, anchorY, left);
         buildViews();
         mWidth = mChildWidth;
         mHeight = mChildHeight * mAdapter.getCount();
diff --git a/src/com/android/browser/view/PieMenu.java b/src/com/android/browser/view/PieMenu.java
index 22ebd18..e494d19 100644
--- a/src/com/android/browser/view/PieMenu.java
+++ b/src/com/android/browser/view/PieMenu.java
@@ -51,6 +51,12 @@ public class PieMenu extends FrameLayout {
      */
     public interface PieView {
 
+        public interface OnLayoutListener {
+            public void onLayout(int ax, int ay, boolean left);
+        }
+
+        public void setLayoutListener(OnLayoutListener l);
+
         public void layout(int anchorX, int anchorY, boolean onleft);
 
         public void draw(Canvas c);
diff --git a/src/com/android/browser/view/PieStackView.java b/src/com/android/browser/view/PieStackView.java
new file mode 100644
index 0000000..df387ad
--- /dev/null
+++ b/src/com/android/browser/view/PieStackView.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2011 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.browser.view;
+
+import com.android.browser.R;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.view.View;
+
+/**
+ * shows views in a stack
+ */
+public class PieStackView extends BasePieView {
+
+    private static final int SLOP = 5;
+
+    private OnCurrentListener mCurrentListener;
+    private int mMinHeight;
+
+    public interface OnCurrentListener {
+        public void onSetCurrent(int index);
+    }
+
+    public PieStackView(Context ctx) {
+        mMinHeight = (int) ctx.getResources()
+                .getDimension(R.dimen.qc_tab_title_height);
+    }
+
+    public void setOnCurrentListener(OnCurrentListener l) {
+        mCurrentListener = l;
+    }
+
+    @Override
+    public void setCurrent(int ix) {
+        super.setCurrent(ix);
+        if (mCurrentListener != null) {
+            mCurrentListener.onSetCurrent(ix);
+            buildViews();
+            layoutChildrenLinear();
+        }
+    }
+
+    /**
+     * this will be called before the first draw call
+     */
+    @Override
+    public void layout(int anchorX, int anchorY, boolean left) {
+        super.layout(anchorX, anchorY, left);
+        buildViews();
+        mWidth = mChildWidth;
+        mHeight = mChildHeight + (mViews.size() - 1) * mMinHeight;
+        mLeft = anchorX + (left ? SLOP : -(SLOP + mChildWidth));
+        mTop = anchorY - mHeight / 2;
+        if (mViews != null) {
+            layoutChildrenLinear();
+        }
+    }
+
+    private void layoutChildrenLinear() {
+        final int n = mViews.size();
+        int top = mTop;
+        int dy = (n == 1) ? 0 : (mHeight - mChildHeight) / (n - 1);
+        for (View view : mViews) {
+            view.layout(mLeft, top, mLeft + mChildWidth, top + mChildHeight);
+            top += dy;
+        }
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        if (mViews != null) {
+            final int n = mViews.size();
+            for (int i = 0; i < mCurrent; i++) {
+                drawView(mViews.get(i), canvas);
+            }
+            for (int i = n - 1; i > mCurrent; i--) {
+                drawView(mViews.get(i), canvas);
+            }
+            drawView(mViews.get(mCurrent), canvas);
+        }
+    }
+
+    @Override
+    protected int findChildAt(int y) {
+        final int ix = (y - mTop) * mViews.size() / mHeight;
+        return ix;
+    }
+
+}