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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.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import com.android.gallery3d.R;
import com.android.gallery3d.filtershow.imageshow.GeometryMetadata.FLIP;
public class ImageFlip extends ImageGeometry {
private static final Paint gPaint = new Paint();
private static final float MIN_FLICK_DIST_FOR_FLIP = 0.1f;
private static final String LOGTAG = "ImageFlip";
private FLIP mNextFlip = FLIP.NONE;
public ImageFlip(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ImageFlip(Context context) {
super(context);
}
@Override
public String getName() {
return getContext().getString(R.string.mirror);
}
@Override
protected void setActionDown(float x, float y) {
super.setActionDown(x, y);
}
boolean hasRotated90(){
int rot = constrainedRotation(getLocalRotation());
return (rot / 90) % 2 != 0;
}
@Override
protected void setActionMove(float x, float y) {
super.setActionMove(x, y);
float diffx = mTouchCenterX - x;
float diffy = mTouchCenterY - y;
float flick = getScaledMinFlick();
if(hasRotated90()){
float temp = diffx;
diffx = diffy;
diffy = temp;
}
if (Math.abs(diffx) >= flick) {
// flick moving left/right
FLIP flip = getLocalFlip();
switch (flip) {
case NONE:
flip = FLIP.HORIZONTAL;
break;
case HORIZONTAL:
flip = FLIP.NONE;
break;
case VERTICAL:
flip = FLIP.BOTH;
break;
case BOTH:
flip = FLIP.VERTICAL;
break;
default:
flip = FLIP.NONE;
break;
}
mNextFlip = flip;
}
if (Math.abs(diffy) >= flick) {
// flick moving up/down
FLIP flip = getLocalFlip();
switch (flip) {
case NONE:
flip = FLIP.VERTICAL;
break;
case VERTICAL:
flip = FLIP.NONE;
break;
case HORIZONTAL:
flip = FLIP.BOTH;
break;
case BOTH:
flip = FLIP.HORIZONTAL;
break;
default:
flip = FLIP.NONE;
break;
}
mNextFlip = flip;
}
}
@Override
protected void setActionUp() {
super.setActionUp();
setLocalFlip(mNextFlip);
}
@Override
public void resetParameter() {
super.resetParameter();
mNextFlip = FLIP.NONE;
}
private float getScaledMinFlick() {
RectF disp = getLocalDisplayBounds();
float scaled = Math.min(disp.width(), disp.height()) * MIN_FLICK_DIST_FOR_FLIP
/ getLocalScale();
return scaled;
}
@Override
protected void drawShape(Canvas canvas, Bitmap image) {
gPaint.setAntiAlias(true);
gPaint.setFilterBitmap(true);
gPaint.setDither(true);
gPaint.setARGB(255, 255, 255, 255);
drawTransformedCropped(canvas, image, gPaint);
}
}
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