Flatten view hierarchy and rotate views

TODO: SRI pano and Lightcycle can use a bit more flattening.
I will get to them next. (Maybe in a different CL.)

TODO: Need to cancel capture animation in onConfigurationChanged()

Change-Id: I00fd3e098117d9fb74fde2c128407ab6275bcedf

1 files changed, 158 insertions, 0 deletions

diff --git a/src/com/android/camera/ui/RotatableLayout.java b/src/com/android/camera/ui/RotatableLayout.java
new file mode 100644
index 000000000..9c5ebd34d
--- /dev/null
+++ b/src/com/android/camera/ui/RotatableLayout.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2013 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.camera.ui;
+
+import android.content.Context;
+import android.content.res.Configuration;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.FrameLayout;
+
+/* RotatableLayout rotates itself as well as all its children when orientation
+ * changes. Specifically, when going from portrait to landscape, camera
+ * controls move from the bottom of the screen to right side of the screen
+ * (i.e. counter clockwise). Similarly, when the screen changes to portrait, we
+ * need to move the controls from right side to the bottom of the screen, which
+ * is a clockwise rotation.
+ */
+
+public class RotatableLayout extends FrameLayout {
+
+    public RotatableLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public RotatableLayout(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public RotatableLayout(Context context) {
+        super(context);
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration config) {
+        super.onConfigurationChanged(config);
+        // rotate the layout itself and all its children
+        boolean clockwise = (config.orientation == Configuration.ORIENTATION_PORTRAIT);
+        rotate(this, clockwise);
+        int childCount = getChildCount();
+        for (int i = 0; i < childCount; i++) {
+            View child = getChildAt(i);
+            rotate(child, clockwise);
+        }
+    }
+
+    public static void rotate(View view, boolean isClockwise) {
+        if (isClockwise) {
+            rotateClockwise(view);
+        } else {
+            rotateCounterClockwise(view);
+        }
+    }
+
+    private static boolean contains(int value, int mask) {
+        return (value & mask) == mask;
+    }
+
+    public static void rotateClockwise(View view) {
+        if (view == null) return;
+        LayoutParams lp = (LayoutParams) view.getLayoutParams();
+        int gravity = lp.gravity;
+        int ngravity = 0;
+        // rotate gravity
+        if (contains(gravity, Gravity.LEFT)) {
+            ngravity |= Gravity.TOP;
+        }
+        if (contains(gravity, Gravity.RIGHT)) {
+            ngravity |= Gravity.BOTTOM;
+        }
+        if (contains(gravity, Gravity.TOP)) {
+            ngravity |= Gravity.RIGHT;
+        }
+        if (contains(gravity, Gravity.BOTTOM)) {
+            ngravity |= Gravity.LEFT;
+        }
+        if (contains(gravity, Gravity.CENTER)) {
+            ngravity |= Gravity.CENTER;
+        }
+        if (contains(gravity, Gravity.CENTER_HORIZONTAL)) {
+            ngravity |= Gravity.CENTER_VERTICAL;
+        }
+        if (contains(gravity, Gravity.CENTER_VERTICAL)) {
+            ngravity |= Gravity.CENTER_HORIZONTAL;
+        }
+        lp.gravity = ngravity;
+        int ml = lp.leftMargin;
+        int mr = lp.rightMargin;
+        int mt = lp.topMargin;
+        int mb = lp.bottomMargin;
+        lp.leftMargin = mb;
+        lp.rightMargin = mt;
+        lp.topMargin = ml;
+        lp.bottomMargin = mr;
+        int width = lp.width;
+        int height = lp.height;
+        lp.width = height;
+        lp.height = width;
+        view.setLayoutParams(lp);
+    }
+
+    public static void rotateCounterClockwise(View view) {
+        if (view == null) return;
+        LayoutParams lp = (LayoutParams) view.getLayoutParams();
+        int gravity = lp.gravity;
+        int ngravity = 0;
+        // change gravity
+        if (contains(gravity, Gravity.RIGHT)) {
+            ngravity |= Gravity.TOP;
+        }
+        if (contains(gravity, Gravity.LEFT)) {
+            ngravity |= Gravity.BOTTOM;
+        }
+        if (contains(gravity, Gravity.TOP)) {
+            ngravity |= Gravity.LEFT;
+        }
+        if (contains(gravity, Gravity.BOTTOM)) {
+            ngravity |= Gravity.RIGHT;
+        }
+        if (contains(gravity, Gravity.CENTER)) {
+            ngravity |= Gravity.CENTER;
+        }
+        if (contains(gravity, Gravity.CENTER_HORIZONTAL)) {
+            ngravity |= Gravity.CENTER_VERTICAL;
+        }
+        if (contains(gravity, Gravity.CENTER_VERTICAL)) {
+            ngravity |= Gravity.CENTER_HORIZONTAL;
+        }
+        lp.gravity = ngravity;
+        int ml = lp.leftMargin;
+        int mr = lp.rightMargin;
+        int mt = lp.topMargin;
+        int mb = lp.bottomMargin;
+        lp.leftMargin = mt;
+        lp.rightMargin = mb;
+        lp.topMargin = mr;
+        lp.bottomMargin = ml;
+        int width = lp.width;
+        int height = lp.height;
+        lp.width = height;
+        lp.height = width;
+        view.setLayoutParams(lp);
+    }
+}
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