66 lines
1.8 KiB
Java
66 lines
1.8 KiB
Java
/*
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* Pixel Dungeon
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* Copyright (C) 2012-2015 Oleg Dolya
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*
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* Shattered Pixel Dungeon
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* Copyright (C) 2014-2022 Evan Debenham
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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package com.watabou.noosa;
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import com.watabou.input.ScrollEvent;
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import com.watabou.utils.Signal;
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//pointer area with additional support for detecting scrolling events
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public class ScrollArea extends PointerArea {
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public ScrollArea( Visual target ){
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super( target );
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ScrollEvent.addScrollListener( scrollListener );
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}
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public ScrollArea(float x, float y, float width, float height ) {
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super( x, y, width, height );
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ScrollEvent.addScrollListener( scrollListener );
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}
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private Signal.Listener<ScrollEvent> scrollListener = new Signal.Listener<ScrollEvent>() {
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@Override
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public boolean onSignal(ScrollEvent event) {
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boolean hit = event != null && target.overlapsScreenPoint( (int)event.pos.x, (int)event.pos.y );
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if (!isActive()) {
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return (hit && blockLevel == ALWAYS_BLOCK);
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}
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if (hit){
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onScroll( event );
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return true;
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}
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return false;
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}
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};
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protected void onScroll( ScrollEvent event ){ }
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@Override
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public void destroy() {
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super.destroy();
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ScrollEvent.removeScrollListener( scrollListener );
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}
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}
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