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comparison dwt/events/SelectionListener.d @ 315:21959e16bc1e

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Improved Listeners access functions.
author Frank Benoit <benoit@tionex.de>
date Tue, 16 Sep 2008 15:28:21 +0200
parents 5899e0b43e5d
children
comparison
equal deleted inserted replaced
314:0f7ac29ac726 315:21959e16bc1e
13 module dwt.events.SelectionListener; 13 module dwt.events.SelectionListener;
14 14
15 15
16 public import dwt.internal.DWTEventListener; 16 public import dwt.internal.DWTEventListener;
17 public import dwt.events.SelectionEvent; 17 public import dwt.events.SelectionEvent;
18
19 import tango.core.Traits;
20 import tango.core.Tuple;
18 21
19 /** 22 /**
20 * Classes which implement this interface provide methods 23 * Classes which implement this interface provide methods
21 * that deal with the events that are generated when selection 24 * that deal with the events that are generated when selection
22 * occurs in a control. 25 * occurs in a control.
32 * @see SelectionAdapter 35 * @see SelectionAdapter
33 * @see SelectionEvent 36 * @see SelectionEvent
34 */ 37 */
35 public interface SelectionListener : DWTEventListener { 38 public interface SelectionListener : DWTEventListener {
36 39
40 public enum {
41 SELECTION,
42 DEFAULTSELECTION
43 }
37 /** 44 /**
38 * Sent when selection occurs in the control. 45 * Sent when selection occurs in the control.
39 * <p> 46 * <p>
40 * For example, selection occurs in a List when the user selects 47 * For example, selection occurs in a List when the user selects
41 * an item or items with the keyboard or mouse. On some platforms, 48 * an item or items with the keyboard or mouse. On some platforms,
61 * 68 *
62 * @param e an event containing information about the default selection 69 * @param e an event containing information about the default selection
63 */ 70 */
64 public void widgetDefaultSelected(SelectionEvent e); 71 public void widgetDefaultSelected(SelectionEvent e);
65 } 72 }
73
74
75 /// DWT extension
76 private class _DgSelectionListenerT(Dg,T...) : SelectionListener {
77
78 alias ParameterTupleOf!(Dg) DgArgs;
79 static assert( is(DgArgs == Tuple!(SelectionEvent,T)),
80 "Delegate args not correct: "~DgArgs.stringof~" vs. (Event,"~T.stringof~")" );
81
82 Dg dg;
83 T t;
84 int type;
85
86 private this( int type, Dg dg, T t ){
87 this.type = type;
88 this.dg = dg;
89 static if( T.length > 0 ){
90 this.t = t;
91 }
92 }
93
94 public void widgetSelected(SelectionEvent e){
95 if( type is SelectionListener.SELECTION ){
96 dg(e,t);
97 }
98 }
99 public void widgetDefaultSelected(SelectionEvent e){
100 if( type is SelectionListener.DEFAULTSELECTION ){
101 dg(e,t);
102 }
103 }
104 }
105
106 SelectionListener dgSelectionListener( Dg, T... )( int type, Dg dg, T args ){
107 return new _DgSelectionListenerT!( Dg, T )( type, dg, args );
108 }
109
110 SelectionListener dgSelectionListenerWidgetSelected( Dg, T... )( Dg dg, T args ){
111 return dgSelectionListener( SelectionListener.SELECTION, dg, args );
112 }
113 SelectionListener dgSelectionListenerWidgetDefaultSelected( Dg, T... )( Dg dg, T args ){
114 return dgSelectionListener( SelectionListener.DEFAULTSELECTION, dg, args );
115 }
116