001package votorola.a.count.gwt; // Copyright 2011, 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.core.client.*; 004import com.google.gwt.event.logical.shared.*; 005import com.google.gwt.regexp.shared.*; 006import com.google.gwt.user.client.Window; 007import votorola.g.lang.*; 008//import votorola.g.web.gwt.*; 009import votorola.g.web.gwt.event.*; 010 011 012/** A controller to maintain a superaccount selection in sync with the value of an 'a' 013 * switch. 014 * 015 * @see SacSelection#aSacSwitch() 016 */ 017public final class SacSetter extends CoalescingSchedulerS implements Scheduler.ScheduledCommand, 018 ValueChangeHandler<String> 019{ 020 021 022 /** Constructs the SacSetter for a given selection model. Construct at most one for 023 * the entire life of the selection model, as currently it does not unregister its 024 * handlers. 025 * 026 * @param _sacSelection the superaccount selection model in which this controller 027 * operates. This is also the source for all events. 028 * @param _phaser the scheduling phaser for state changes, which is exposed as 029 * {@linkplain #phaser phaser}(). 030 * @param eventsPhaser the scheduling phaser for the dispatch of events 031 * consequent on state changes. 032 */ 033 public SacSetter( SacSelection _sacSelection, Phaser _phaser, final Phaser eventsPhaser ) 034 { 035 super( Scheduler.get(), _phaser ); 036 sacSelection = _sacSelection; 037 init( SacSetter.this ); 038 039 gun = new CoalescingSelectionChangeGun( sacSelection, eventsPhaser ); 040 sacSelection.aSacSwitch().addHandler( SacSetter.this ); // no need to unregister, registry does not outlive this listener 041 syncFromSwitch(); // init state 042 } 043 044 045 046 // ------------------------------------------------------------------------------------ 047 048 049 /** The superaccount that is currently set, which is also to be used as the return 050 * value in the implementation of SacSelection.{@linkplain SacSelection#getSac() 051 * getSac}(). 052 */ 053 public SacJS sac() { return sac; } 054 055 056 private SacJS sac; 057 058 059 /** Sets the superaccount without firing an event and returns true if this 060 * resulted in a change, false otherwise. 061 * 062 * @see #sac() 063 */ 064 private boolean setSac( final SacJS newSac ) 065 { 066 if( ObjectX.nullEquals( newSac, sac )) return false; 067 068 sac = newSac; 069 return true; 070 } 071 072 073 074 // - S c h e d u l e r . S c h e d u l e d - C o m m a n d ---------------------------- 075 076 077 /** Synchronizes the superaccount setting from the 'a' switch, and schedules a 078 * selection change event for any state change that results. 079 */ 080 public void execute() { if( syncFromSwitch() ) gun.schedule(); } 081 082 083 084 // - V a l u e - C h a n g e - H a n d l e r ------------------------------------------ 085 086 087 public void onValueChange( ValueChangeEvent<String> _e ) { schedule(); } 088 089 090 091//// P r i v a t e /////////////////////////////////////////////////////////////////////// 092 093 094 private final CoalescingSelectionChangeGun gun; 095 096 097 098 private final SacSelection sacSelection; 099 100 101 /** Synchronizes the superaccount from the 'a' switch without firing an event and 102 * returns true if this resulted in a change, false otherwise. 103 * 104 * @see #sac() 105 * @see SacSelection#aSacSwitch() 106 */ 107 private final @Warning("init call") boolean syncFromSwitch() 108 { 109 final CountJS count = sacSelection.count(); 110 if( count == null ) return setSac( null ); 111 112 final String a = sacSelection.aSacSwitch().get(); 113 if( a == null ) return setSac( count.voteSuperaccount() ); 114 115 final MatchResult m = SacSelection.A_PATTERN.exec( a ); 116 if( a == null ) 117 { 118 Window.alert( "Malformed superaccount switch: a=" + a ); 119 return setSac( count.nullSuperaccount() ); 120 } 121 122 final CountingMethodJS.SwitchMnemonic countingMethodMnemonic; 123 { 124 final String name = m.getGroup( 1 ); 125 try{ countingMethodMnemonic = CountingMethodJS.SwitchMnemonic.valueOf( name ); } 126 catch( final IllegalArgumentException x ) 127 { 128 Window.alert( "Malformed superaccount switch, no such counting method \"" 129 + name + "\": a=" + a ); 130 return setSac( count.nullSuperaccount() ); 131 } 132 } 133 134 final String accountName = m.getGroup( 2 ); 135 final SacJS newSac = count.superaccount( countingMethodMnemonic.fullName(), accountName ); 136 if( newSac == null ) 137 { 138 Window.alert( "Current count has no such superaccount: a=" + a ); 139 return setSac( count.nullSuperaccount() ); 140 } 141 142 return setSac( newSac ); 143 } 144 145 146 147}