001package votorola.s.gwt.stage.poll; // Copyright 2012, 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.GWT; 004import com.google.gwt.uibinder.client.*; 005import com.google.gwt.user.client.ui.*; 006import com.google.web.bindery.event.shared.HandlerRegistration; 007import java.util.*; 008import votorola.a.count.*; 009import votorola.g.hold.*; 010import votorola.g.lang.*; 011import votorola.g.web.gwt.*; 012import votorola.g.web.gwt.event.*; 013import votorola.s.gwt.stage.*; 014 015 016/** A view of a {@linkplain Polltrack polltrack}. It comprises a sequence of compressed 017 * {@linkplain PollV poll views} (one per poll), ordered alphabetically from left to 018 * right according to the last component of the poll name ("sandbox" in the illustration 019 * below). When a poll is {@linkplain Stage#getPollName() staged} or cued by the mouse, 020 * the corresponding view expands (X).<pre> 021 * 022 * {@linkplain HeadsUpDisplay heads up display} 023 * staged poll / 024 * \ / 025 * \ Sys/p/sandbox 026 - ------------X---------------X-------------------- 027 * \ 028 * \ 029 * poll cued by mouse</pre> 030 * 031 * @see <a href='../../../../../../../s/gwt/stage/poll/PolltrackV.ui.xml' 032 * >PolltrackV.ui.xml</a> 033 */ 034public final class PolltrackV extends Composite 035{ 036 037 038 /** Constructs a PolltrackV. 039 */ 040 PolltrackV( Polltrack _track ) 041 { 042 track = _track; 043 new Modeller(); 044 } 045 046 047 048 /** Returns the {@linkplain StageV staged instance} of PolltrackV, or null if none is 049 * staged. 050 */ 051 public static PolltrackV i( final StageV stageV ) 052 { 053 final Iterator<Widget> ww = stageV.iterator(); 054 while( ww.hasNext() ) 055 { 056 final Widget w = ww.next(); 057 if( w instanceof PolltrackV ) return (PolltrackV)w; 058 } 059 060 return null; 061 } 062 063 064 private static PolltrackV instance; // not necessarily staged, though actually it will be 065 066 { 067 if( instance != null ) throw new IllegalStateException(); // grep "instance" for reason 068 069 instance = PolltrackV.this; 070 } 071 072 073 074 // ` e a r l y ```````````````````````````````````````````````````````````````````````` 075 076 077 private final Spool spool = new Spool1(); 078 079 080 081 @Warning("non-API") interface UiBinderI extends UiBinder<HTMLPanel,PolltrackV> {} 082 083 { 084 final UiBinderI uiBinder = GWT.create( UiBinderI.class ); 085 initWidget( uiBinder.createAndBindUi( PolltrackV.this )); 086 } 087 088 089 090 // - C o m p o s i t e ---------------------------------------------------------------- 091 092 093 protected @Override HTMLPanel getWidget() { return (HTMLPanel)super.getWidget(); } 094 095 096 097 // - W i d g e t ---------------------------------------------------------------------- 098 099 100 protected @Override void onUnload() 101 { 102 super.onUnload(); 103 spool.unwind(); 104 } 105 106 107 108 public @Override void removeFromParent() 109 { 110 if( getParent() != null ) throw new UnsupportedOperationException(); 111 } 112 113 114 115//// P r i v a t e /////////////////////////////////////////////////////////////////////// 116 117 118 @UiField @Warning("non-API") FlowPanel listV; 119 120 121 122 @UiFactory @Warning("non-API") 123 HeadsUpDisplay newHeadsUp() { return new HeadsUpDisplay( PolltrackV.this, spool ); } 124 125 126 127 private final Polltrack track; 128 129 130 131 // ==================================================================================== 132 133 134 private final class Modeller implements ChangeHandler 135 { 136 137 Modeller() 138 { 139 spool.add( new Hold() 140 { 141 final HandlerRegistration hR = GWTX.i().bus().addHandlerToSource( 142 Change.TYPE, /*source*/track.eventSource, Modeller.this ); 143 public void release() { hR.removeHandler(); } 144 }); 145 remodel(); 146 } 147 148 149 public void onChange( Change _e ) { remodel(); } 150 151 152 private void remodel() 153 { 154 if( spool.isUnwinding() ) return; 155 156 int p = 0; 157 int pVN = listV.getWidgetCount(); 158 final int pN = track.size(); 159 for(; p < pN; ++p ) // for tracked polls, remodel the views 160 { 161 final PollV pollV; 162 if( p == pVN ) 163 { 164 pollV = new PollV( spool ); 165 listV.add( pollV ); 166 ++pVN; 167 } 168 else pollV = (PollV)listV.getWidget( p ); 169 pollV.setPoll( track.get( p )); 170 } 171 for(; p < pVN; ++p ) // for remaining views, clear the models 172 { 173 final PollV pollV = (PollV)listV.getWidget( p ); 174 pollV.setPoll( null ); 175 } 176 } 177 178 } 179 180 181}