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/*
* Copyright (C) 2013 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;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Point;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.LinearLayout;
import com.android.gallery3d.R;
import com.android.gallery3d.filtershow.filters.FilterRepresentation;
import com.android.gallery3d.filtershow.imageshow.MasterImage;
public class MovableLinearLayout extends LinearLayout {
private Point mTouchDown = new Point();
private FilterRepresentation mFilterRepresentation;
private int mTouchSlope = 3;
private static final String LOGTAG = "MovableLinearLayout";
public MovableLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
private void resetView() {
setTranslationX(0);
mTouchDown.x = 0;
mTouchDown.y = 0;
setAlpha(1.0f);
setBackgroundResource(R.drawable.filtershow_button_background);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
int ex = (int) event.getX();
int ey = (int) event.getY();
if (event.getAction() == MotionEvent.ACTION_DOWN) {
mTouchDown.x = ex;
mTouchDown.y = ey;
FilterShowActivity activity = (FilterShowActivity) getContext();
activity.getPanelController().showComponentWithRepresentation(mFilterRepresentation);
}
if (event.getAction() == MotionEvent.ACTION_MOVE) {
int delta = ex - mTouchDown.x;
if (delta > 0 && (delta - getTranslationX()) > mTouchSlope) {
setTranslationX(delta);
float alpha = (getWidth() - getTranslationX()) / getWidth();
int backgroundColor = Color.argb((int) (1.0f - alpha * 255), 255, 0, 0);
setBackgroundColor(backgroundColor);
setAlpha(alpha);
}
}
if (event.getAction() == MotionEvent.ACTION_UP
|| event.getAction() == MotionEvent.ACTION_CANCEL) {
if (getTranslationX() > getWidth() / 4) {
delete(mFilterRepresentation);
} else {
resetView();
}
}
return true;
}
private void delete(FilterRepresentation filterRepresentation) {
FilterShowActivity activity = (FilterShowActivity) getContext();
activity.getPanelController().removeFilterRepresentation(filterRepresentation);
}
public void setFilterRepresentation(FilterRepresentation filterRepresentation) {
mFilterRepresentation = filterRepresentation;
resetView();
}
}
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