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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package org.mozilla.gecko;
import android.content.Context;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.util.Log;
import org.libreoffice.LOKitShell;
import org.mozilla.gecko.gfx.GeckoLayerClient;
import org.mozilla.gecko.gfx.ImmutableViewportMetrics;
public class OnSlideSwipeListener implements OnTouchListener {
private static String LOGTAG = OnSlideSwipeListener.class.getName();
private final GestureDetector mGestureDetector;
private GeckoLayerClient mLayerClient;
public OnSlideSwipeListener(Context ctx, GeckoLayerClient client){
mGestureDetector = new GestureDetector(ctx, new GestureListener());
mLayerClient = client;
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velX, float velY) {
// Check if the page is already zoomed-in.
// Disable swiping gesture if that's the case.
ImmutableViewportMetrics viewportMetrics = mLayerClient.getViewportMetrics();
if (viewportMetrics.viewportRectLeft > viewportMetrics.pageRectLeft ||
viewportMetrics.viewportRectRight < viewportMetrics.pageRectRight) {
return false;
}
// Otherwise, the page is smaller than viewport, perform swipe
// gesture.
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD
&& Math.abs(velX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
}
} catch (Exception exception) {
exception.printStackTrace();
}
return false;
}
}
public void onSwipeRight() {
Log.d(LOGTAG, "onSwipeRight");
LOKitShell.sendSwipeRightEvent();
}
public void onSwipeLeft() {
Log.d(LOGTAG, "onSwipeLeft");
LOKitShell.sendSwipeLeftEvent();
}
@Override
public boolean onTouch(View v, MotionEvent me) {
return mGestureDetector.onTouchEvent(me);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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