declgtk.components.component source code

1 module declgtk.components.component;
2 
3 import declgtk.queue;
4 import declui.components.component;
5 import gtk.Widget;
6 
7 /**
8 An interface that defines some basic methods that can be used without requiring
9 instantiation the underlying template.
10 */
11 interface IGtkWidgetComponent
12 {
13 	Widget getWidget();
14 }
15 
16 abstract class GtkComponent(Type): IComponent
17 {
18 	private Type _widget;
19 
20 	/// Initialises the component.
21 	final void initialise()
22 	{
23 		_widget = createInstance();
24 	}
25 
26 	/// Returns the internal widget.
27 	final Type getWidget()
28 	{
29 		if (_widget is null)
30 			initialise();
31 		assert(_widget !is null, "Widget was not correctly created");
32 		return _widget;
33 	}
34 
35 	/// Queues a setter to be executed.
36 	protected void queue(void delegate(Type) callback)
37 	{
38 		queueOnGtk(
39 		{
40 				callback(getWidget);
41 		});
42 	}
43 
44 	/// Creates and returns an new instance of this type.
45 	protected abstract Type createInstance();
46 
47 	override IComponent getInternal()
48 	{
49 		return this;
50 	}
51 
52 	override bool visible()
53 	{
54 		return true;
55 	}
56 
57 	override void visible(bool)
58 	{
59 
60 	}
61 }
62 
63 /**
64 A Component with a GTK backend.
65 */
66 abstract class GtkWidgetComponent(Type) : IGtkWidgetComponent, IComponent
67 {
68 	private Type _widget;
69 
70 	/// Initialises the component.
71 	final void initialise()
72 	{
73 		_widget = createInstance();
74 		_visible = true;
75 		_widget.show();
76 	}
77 
78 	/// Returns the internal widget.
79 	override final Type getWidget()
80 	{
81 		if (_widget is null)
82 			initialise();
83 		assert(_widget !is null, "Widget was not correctly created");
84 		return _widget;
85 	}
86 
87 	/// Queues a setter to be executed.
88 	protected void queue(void delegate(Type) callback)
89 	{
90 		queueOnGtk(
91 		{
92 				callback(getWidget);
93 		});
94 	}
95 
96 	/// Creates and returns an new instance of this type.
97 	protected abstract Type createInstance();
98 
99 	override IComponent getInternal()
100 	{
101 		return this;
102 	}
103 
104 	/*
105 	Methods common for all Gtk Widgets
106 	*/
107 	private bool _visible = false;
108 	override void visible(bool visible)
109 	{
110 		_visible = visible;
111 		queue((widget)
112 		{
113 			if (_visible)
114 				widget.show();
115 			else
116 				widget.hide();
117 		});
118 	}
119 
120 	override bool visible()
121 	{
122 		return _visible;
123 	}
124 }