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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.content.Context;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
// 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);
}
@Override
protected void onFinishInflate() {
mChild = getChildAt(0);
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
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);
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;
}
}
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