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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.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
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.
class RotateLayout extends ViewGroup {
private int mOrientation;
private View mChild;
public RotateLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onFinishInflate() {
mChild = getChildAt(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) {
switch(mOrientation) {
case 0:
case 180:
measureChild(mChild, widthSpec, heightSpec);
setMeasuredDimension(mChild.getMeasuredWidth(), mChild.getMeasuredHeight());
break;
case 90:
case 270:
measureChild(mChild, heightSpec, widthSpec);
setMeasuredDimension(mChild.getMeasuredHeight(), mChild.getMeasuredWidth());
break;
}
}
@Override
public void dispatchDraw(Canvas canvas) {
int w = getWidth();
int h = getHeight();
switch (mOrientation) {
case 90:
canvas.translate(0, h);
canvas.rotate(-mOrientation);
break;
case 180:
canvas.rotate(-mOrientation, w / 2, h / 2);
break;
case 270:
canvas.translate(w, 0);
canvas.rotate(-mOrientation);
break;
}
super.dispatchDraw(canvas);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
float width = getWidth();
float height = getHeight();
switch (mOrientation) {
case 90: event.setLocation(height - y, x); break;
case 180: event.setLocation(width - x, height - y); break;
case 270: event.setLocation(y, width - x); break;
}
boolean result = mChild.dispatchTouchEvent(event);
event.setLocation(x, y);
return result;
}
// Rotate the view counter-clockwise
public void setOrientation(int orientation) {
orientation = orientation % 360;
if (mOrientation == orientation) return;
mOrientation = orientation;
requestLayout();
}
}
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