001package votorola.s.gwt.stage.vote; // Copyright 2013, Michael Allan. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE. 002 003import com.google.gwt.dom.client.*; 004import votorola.g.lang.*; 005import votorola.g.web.gwt.*; 006import votorola.s.gwt.stage.*; 007import votorola.s.gwt.stage.light.*; 008 009 010/** A stage light to indicate the dart sector and cast relation of the {@linkplain 011 * NodeV.Sensor node sensor} pointed by the user. 012 */ 013final class DartLight implements Light<NodeV.Sensor> 014{ 015 016 017 /** Creates the {@linkplain #i() single instance} of DartLight. 018 */ 019 DartLight() 020 { 021 Stage.i().lightBank().addLight( DartLight.this ); // no need to remove, co-extant 022 } 023 024 025 026 /** The single instance of DartLight. 027 */ 028 static DartLight i() { return instance; } 029 030 031 private static DartLight instance; 032 033 { 034 if( instance != null ) throw new IllegalStateException(); 035 036 instance = DartLight.this; 037 } 038 039 040 041 // - L i g h t ------------------------------------------------------------------------ 042 043 044 public Actuator<NodeV.Sensor> assignActuator( final NodeV.Sensor sensor ) 045 { 046 return new ActuatorD( sensor ); 047 } 048 049 050 051 public final NodeV.Sensor tryCast( final Sensor sensor ) 052 { 053 return sensor instanceof NodeV.Sensor? (NodeV.Sensor)sensor: null; 054 } 055 056 057 058 059//// P r i v a t e /////////////////////////////////////////////////////////////////////// 060 061 062 private ActuatorD actuatorLit; 063 064 065 066 private String bodyClassLit; 067 068 069 070 // ==================================================================================== 071 072 073 private final class ActuatorD implements Actuator<NodeV.Sensor> 074 { 075 076 ActuatorD( final NodeV.Sensor sensor ) 077 { 078 nodeV = sensor.view(); 079 resetBodyClass(); 080 } 081 082 083 private String bodyClass; // for the assigned sensor 084 085 086 private @Warning("init call") void resetBodyClass() 087 { 088 bodyClass = nodeV.isTightCycler()? "voDartLight-y": 089 // tight cycle, to light both voter and candidate as they are same person 090 "voDartLight-" + nodeV.dartLightClassName(); 091 } 092 093 094 private final NodeV nodeV; 095 096 097 private void relight( final String bodyClassNew ) 098 { 099 if( ObjectX.nullEquals( bodyClassLit, bodyClassNew )) return; 100 101 ElementX.replaceNullClassName( bodyClassLit, bodyClassNew, 102 Document.get().getBody() ); 103 bodyClassLit = bodyClassNew; 104 } 105 106 107 // - A c t u a t o r -------------------------------------------------------------- 108 109 110 public void changed( NodeV.Sensor sensor_ ) 111 { 112 resetBodyClass(); 113 if( actuatorLit == ActuatorD.this ) relight( bodyClass ); 114 } 115 116 117 public Light<NodeV.Sensor> light() { return DartLight.this; } 118 119 120 public void out( final NodeV.Sensor sensor ) 121 { 122 if( actuatorLit == ActuatorD.this ) actuatorLit = null; 123 relight( null ); 124 } 125 126 127 public void over( final NodeV.Sensor sensor ) 128 { 129 actuatorLit = ActuatorD.this; 130 relight( bodyClass ); 131 } 132 133 } 134 135 136}