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Diffstat (limited to 'src/com/android/camera/ui/RotateLayout.java')
-rw-r--r--src/com/android/camera/ui/RotateLayout.java203
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diff --git a/src/com/android/camera/ui/RotateLayout.java b/src/com/android/camera/ui/RotateLayout.java
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+/*
+ * 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.camera.ui;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewParent;
+
+import com.android.gallery3d.common.ApiHelper;
+import com.android.gallery3d.util.MotionEventHelper;
+
+// A RotateLayout is designed to display a single item and provides the
+// capabilities to rotate the item.
+public class RotateLayout extends ViewGroup implements Rotatable {
+ @SuppressWarnings("unused")
+ private static final String TAG = "RotateLayout";
+ private int mOrientation;
+ private Matrix mMatrix = new Matrix();
+ protected View mChild;
+
+ public RotateLayout(Context context, AttributeSet attrs) {
+ super(context, attrs);
+ // The transparent background here is a workaround of the render issue
+ // happened when the view is rotated as the device's orientation
+ // changed. The view looks fine in landscape. After rotation, the view
+ // is invisible.
+ setBackgroundResource(android.R.color.transparent);
+ }
+
+ @TargetApi(ApiHelper.VERSION_CODES.HONEYCOMB)
+ @Override
+ protected void onFinishInflate() {
+ mChild = getChildAt(0);
+ if (ApiHelper.HAS_VIEW_TRANSFORM_PROPERTIES) {
+ mChild.setPivotX(0);
+ mChild.setPivotY(0);
+ }
+ }
+
+ @Override
+ protected void onLayout(
+ boolean change, int left, int top, int right, int bottom) {
+ int width = right - left;
+ int height = bottom - top;
+ switch (mOrientation) {
+ case 0:
+ case 180:
+ mChild.layout(0, 0, width, height);
+ break;
+ case 90:
+ case 270:
+ mChild.layout(0, 0, height, width);
+ break;
+ }
+ }
+
+ @Override
+ public boolean dispatchTouchEvent(MotionEvent event) {
+ if (!ApiHelper.HAS_VIEW_TRANSFORM_PROPERTIES) {
+ final int w = getMeasuredWidth();
+ final int h = getMeasuredHeight();
+ switch (mOrientation) {
+ case 0:
+ mMatrix.setTranslate(0, 0);
+ break;
+ case 90:
+ mMatrix.setTranslate(0, -h);
+ break;
+ case 180:
+ mMatrix.setTranslate(-w, -h);
+ break;
+ case 270:
+ mMatrix.setTranslate(-w, 0);
+ break;
+ }
+ mMatrix.postRotate(mOrientation);
+ event = MotionEventHelper.transformEvent(event, mMatrix);
+ }
+ return super.dispatchTouchEvent(event);
+ }
+
+ @Override
+ protected void dispatchDraw(Canvas canvas) {
+ if (ApiHelper.HAS_VIEW_TRANSFORM_PROPERTIES) {
+ super.dispatchDraw(canvas);
+ } else {
+ canvas.save();
+ int w = getMeasuredWidth();
+ int h = getMeasuredHeight();
+ switch (mOrientation) {
+ case 0:
+ canvas.translate(0, 0);
+ break;
+ case 90:
+ canvas.translate(0, h);
+ break;
+ case 180:
+ canvas.translate(w, h);
+ break;
+ case 270:
+ canvas.translate(w, 0);
+ break;
+ }
+ canvas.rotate(-mOrientation, 0, 0);
+ super.dispatchDraw(canvas);
+ canvas.restore();
+ }
+ }
+
+ @TargetApi(ApiHelper.VERSION_CODES.HONEYCOMB)
+ @Override
+ protected void onMeasure(int widthSpec, int heightSpec) {
+ int w = 0, h = 0;
+ switch(mOrientation) {
+ case 0:
+ case 180:
+ measureChild(mChild, widthSpec, heightSpec);
+ w = mChild.getMeasuredWidth();
+ h = mChild.getMeasuredHeight();
+ break;
+ case 90:
+ case 270:
+ measureChild(mChild, heightSpec, widthSpec);
+ w = mChild.getMeasuredHeight();
+ h = mChild.getMeasuredWidth();
+ break;
+ }
+ setMeasuredDimension(w, h);
+
+ if (ApiHelper.HAS_VIEW_TRANSFORM_PROPERTIES) {
+ switch (mOrientation) {
+ case 0:
+ mChild.setTranslationX(0);
+ mChild.setTranslationY(0);
+ break;
+ case 90:
+ mChild.setTranslationX(0);
+ mChild.setTranslationY(h);
+ break;
+ case 180:
+ mChild.setTranslationX(w);
+ mChild.setTranslationY(h);
+ break;
+ case 270:
+ mChild.setTranslationX(w);
+ mChild.setTranslationY(0);
+ break;
+ }
+ mChild.setRotation(-mOrientation);
+ }
+ }
+
+ @Override
+ public boolean shouldDelayChildPressedState() {
+ return false;
+ }
+
+ // Rotate the view counter-clockwise
+ @Override
+ public void setOrientation(int orientation, boolean animation) {
+ orientation = orientation % 360;
+ if (mOrientation == orientation) return;
+ mOrientation = orientation;
+ requestLayout();
+ }
+
+ public int getOrientation() {
+ return mOrientation;
+ }
+
+ @Override
+ public ViewParent invalidateChildInParent(int[] location, Rect r) {
+ if (!ApiHelper.HAS_VIEW_TRANSFORM_PROPERTIES && mOrientation != 0) {
+ // The workaround invalidates the entire rotate layout. After
+ // rotation, the correct area to invalidate may be larger than the
+ // size of the child. Ex: ListView. There is no way to invalidate
+ // only the necessary area.
+ r.set(0, 0, getWidth(), getHeight());
+ }
+ return super.invalidateChildInParent(location, r);
+ }
+}