001package votorola.s.gwt.stage; // 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.dom.client.*; 004import com.google.gwt.event.dom.client.*; 005import com.google.gwt.user.client.Window; 006import com.google.gwt.user.client.ui.*; 007import com.google.web.bindery.event.shared.HandlerRegistration; 008import java.util.*; 009import votorola.a.web.gwt.*; 010import votorola.g.hold.*; 011import votorola.g.lang.*; 012import votorola.g.web.gwt.*; 013import votorola.g.web.gwt.event.*; 014 015 016/** A warning view rendered as a small red triangle. The view is ordinarily invisible, 017 * but appears whenever one or more {@linkplain Stage#warnings() warnings} are issued. 018 * Clicking on it displays a summary of the actual warnings in a separate popup window. 019 */ 020public final class WarnV extends Image 021{ 022 023 024 /** Constructs a WarnV. 025 */ 026 public WarnV() 027 { 028 super( App.i().staticContextLocation() + "/stage/warn.png" ); 029 addStyleName( "WarnV" ); 030 new Enabler(); 031 new Popper(); 032 } 033 034 035 036 // - W i d g e t ---------------------------------------------------------------------- 037 038 039 public @Override void removeFromParent() 040 { 041 if( getParent() != null ) throw new UnsupportedOperationException(); 042 } 043 044 045 046 protected @Override void onUnload() 047 { 048 super.onUnload(); 049 spool.unwind(); 050 } 051 052 053 054//// P r i v a t e /////////////////////////////////////////////////////////////////////// 055 056 057 private final Spool spool = new Spool1(); 058 059 060 061 // ==================================================================================== 062 063 064 private final class Enabler implements PropertyChangeHandler 065 { 066 067 Enabler() 068 { 069 spool.add( new Hold() 070 { 071 final HandlerRegistration hR = GWTX.i().bus().addHandlerToSource( 072 PropertyChange.TYPE, /*source*/Stage.i(), Enabler.this ); 073 public void release() { hR.removeHandler(); } 074 }); 075 reEnable(); // init 076 } 077 078 079 public final void onPropertyChange( final PropertyChange e ) 080 { 081 if( "warnings".equals(e.propertyName()) && !spool.isUnwinding() ) reEnable(); 082 } 083 084 085 private void reEnable() 086 { 087 final Style style = getElement().getStyle(); 088 if( Stage.i().warnings().size() > 0 ) style.clearDisplay(); 089 else style.setDisplay( Style.Display.NONE ); 090 } 091 092 093 } 094 095 096 097 // ==================================================================================== 098 099 100 private final class Popper implements ClickHandler 101 { 102 103 Popper() { addClickHandler( Popper.this ); } // no need to unregister, registry does not outlive this listener 104 105 106 public void onClick( ClickEvent _e ) 107 { 108 final StringBuilder b = GWTX.stringBuilderClear(); 109 final List<String> warnings = Stage.i().warnings(); 110 final int wN = warnings.size(); 111 if( wN > 0 ) 112 { 113 int w = 0; 114 for( ;; ) 115 { 116 final String warning = warnings.get( w ); 117 b.append( warning ); 118 ++w; 119 if( w >= wN ) break; 120 121 b.append( '\n' ); 122 b.append( '\n' ); 123 } 124 } 125 else assert false; 126 Window.alert( b.toString() ); 127 } 128 129 } 130 131 132}