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/*
* Copyright (C) 2012 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.gallery3d.filtershow.imageshow;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.view.ScaleGestureDetector.OnScaleGestureListener;
import com.android.gallery3d.filtershow.editors.BasicEditor;
import com.android.gallery3d.filtershow.editors.EditorTinyPlanet;
import com.android.gallery3d.filtershow.filters.FilterTinyPlanetRepresentation;
public class ImageTinyPlanet extends ImageShow {
private static final String LOGTAG = "ImageTinyPlanet";
private float mTouchCenterX = 0;
private float mTouchCenterY = 0;
private float mCurrentX = 0;
private float mCurrentY = 0;
private float mCenterX = 0;
private float mCenterY = 0;
private float mStartAngle = 0;
private FilterTinyPlanetRepresentation mTinyPlanetRep;
private EditorTinyPlanet mEditorTinyPlanet;
private ScaleGestureDetector mScaleGestureDetector = null;
boolean mInScale = false;
RectF mDestRect = new RectF();
OnScaleGestureListener mScaleGestureListener = new OnScaleGestureListener() {
private float mScale = 100;
@Override
public void onScaleEnd(ScaleGestureDetector detector) {
mInScale = false;
}
@Override
public boolean onScaleBegin(ScaleGestureDetector detector) {
mInScale = true;
mScale = mTinyPlanetRep.getValue();
return true;
}
@Override
public boolean onScale(ScaleGestureDetector detector) {
int value = mTinyPlanetRep.getValue();
mScale *= detector.getScaleFactor();
value = (int) (mScale);
value = Math.min(mTinyPlanetRep.getMaximum(), value);
value = Math.max(mTinyPlanetRep.getMinimum(), value);
mTinyPlanetRep.setValue(value);
invalidate();
mEditorTinyPlanet.commitLocalRepresentation();
mEditorTinyPlanet.updateUI();
return true;
}
};
public ImageTinyPlanet(Context context) {
super(context);
mScaleGestureDetector = new ScaleGestureDetector(context, mScaleGestureListener);
}
public ImageTinyPlanet(Context context, AttributeSet attrs) {
super(context, attrs);
mScaleGestureDetector = new ScaleGestureDetector(context,mScaleGestureListener );
}
protected static float angleFor(float dx, float dy) {
return (float) (Math.atan2(dx, dy) * 180 / Math.PI);
}
protected float getCurrentTouchAngle() {
if (mCurrentX == mTouchCenterX && mCurrentY == mTouchCenterY) {
return 0;
}
float dX1 = mTouchCenterX - mCenterX;
float dY1 = mTouchCenterY - mCenterY;
float dX2 = mCurrentX - mCenterX;
float dY2 = mCurrentY - mCenterY;
float angleA = angleFor(dX1, dY1);
float angleB = angleFor(dX2, dY2);
return (float) (((angleB - angleA) % 360) * Math.PI / 180);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
float x = event.getX();
float y = event.getY();
mCurrentX = x;
mCurrentY = y;
mCenterX = getWidth() / 2;
mCenterY = getHeight() / 2;
mScaleGestureDetector.onTouchEvent(event);
if (mInScale) {
return true;
}
switch (event.getActionMasked()) {
case (MotionEvent.ACTION_DOWN):
mTouchCenterX = x;
mTouchCenterY = y;
mStartAngle = mTinyPlanetRep.getAngle();
break;
case (MotionEvent.ACTION_MOVE):
mTinyPlanetRep.setAngle(mStartAngle + getCurrentTouchAngle());
break;
}
invalidate();
mEditorTinyPlanet.commitLocalRepresentation();
return true;
}
public void setRepresentation(FilterTinyPlanetRepresentation tinyPlanetRep) {
mTinyPlanetRep = tinyPlanetRep;
}
public void setEditor(BasicEditor editorTinyPlanet) {
mEditorTinyPlanet = (EditorTinyPlanet) editorTinyPlanet;
}
@Override
public void onDraw(Canvas canvas) {
Bitmap bitmap = MasterImage.getImage().getHighresImage();
if (bitmap == null) {
bitmap = MasterImage.getImage().getFilteredImage();
}
if (bitmap != null) {
display(canvas, bitmap);
}
}
private void display(Canvas canvas, Bitmap bitmap) {
float sw = canvas.getWidth();
float sh = canvas.getHeight();
float iw = bitmap.getWidth();
float ih = bitmap.getHeight();
float nsw = sw;
float nsh = sh;
if (sw * ih > sh * iw) {
nsw = sh * iw / ih;
} else {
nsh = sw * ih / iw;
}
mDestRect.left = (sw - nsw) / 2;
mDestRect.top = (sh - nsh) / 2;
mDestRect.right = sw - mDestRect.left;
mDestRect.bottom = sh - mDestRect.top;
canvas.drawBitmap(bitmap, null, mDestRect, mPaint);
}
}
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