Evan Debenham
145 lines
3.7 KiB
Java
145 lines
3.7 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) 2014-2023 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.PointerEvent;
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import com.watabou.utils.Signal;
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public class PointerArea extends Visual implements Signal.Listener<PointerEvent> {
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// Its target can be pointerarea itself
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public Visual target;
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protected PointerEvent curEvent = null;
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protected boolean hovered = false;
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public int blockLevel = BLOCK_WHEN_ACTIVE;
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public static final int ALWAYS_BLOCK = 0; //Always block input to overlapping elements
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public static final int BLOCK_WHEN_ACTIVE = 1; //Only block when active (default)
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public static final int NEVER_BLOCK = 2; //Never block (handy for buttons in scroll areas)
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public PointerArea( Visual target ) {
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super( 0, 0, 0, 0 );
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this.target = target;
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PointerEvent.addPointerListener( this );
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}
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public PointerArea( float x, float y, float width, float height ) {
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super( x, y, width, height );
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this.target = this;
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visible = false;
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PointerEvent.addPointerListener( this );
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}
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@Override
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public boolean onSignal( PointerEvent event ) {
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boolean hit = event != null && target.overlapsScreenPoint( (int)event.current.x, (int)event.current.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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boolean returnValue = (event.type == PointerEvent.Type.DOWN || event == curEvent);
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if (event.type == PointerEvent.Type.DOWN) {
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if (curEvent == null) {
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curEvent = event;
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}
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onPointerDown( event );
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} else if (event.type == PointerEvent.Type.UP) {
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onPointerUp( event );
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if (curEvent == event) {
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curEvent = null;
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onClick( event );
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}
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} else if (event.type == PointerEvent.Type.HOVER) {
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if (event.handled && hovered){
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hovered = false;
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onHoverEnd(event);
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} else if (!event.handled && !hovered){
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hovered = true;
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onHoverStart(event);
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}
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event.handle();
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}
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return returnValue && blockLevel != NEVER_BLOCK;
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} else {
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if (event == null && curEvent != null) {
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onDrag(curEvent);
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} else if (curEvent != null && event.type == PointerEvent.Type.UP) {
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onPointerUp( event );
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curEvent = null;
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} else if (event != null && event.type == PointerEvent.Type.HOVER && hovered){
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hovered = false;
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onHoverEnd(event);
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}
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return false;
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}
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}
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protected void onPointerDown( PointerEvent event ) { }
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protected void onPointerUp( PointerEvent event) { }
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protected void onClick( PointerEvent event ) { }
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protected void onDrag( PointerEvent event ) { }
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protected void onHoverStart( PointerEvent event ) { }
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protected void onHoverEnd( PointerEvent event ) { }
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public void reset() {
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curEvent = null;
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}
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//moves this pointer area to the front of the pointer event order
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public void givePointerPriority(){
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PointerEvent.removePointerListener( this );
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PointerEvent.addPointerListener( this );
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}
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@Override
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public void destroy() {
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PointerEvent.removePointerListener( this );
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super.destroy();
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}
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}
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