w4d.widget.button source code

1 // Written in the D programming language.
2 /++
3  + Authors: KanzakiKino
4  + Copyright: KanzakiKino 2018
5  + License: LGPL-3.0
6 ++/
7 module w4d.widget.button;
8 import w4d.parser.colorset,
9        w4d.style.rect,
10        w4d.style.scalar,
11        w4d.task.window,
12        w4d.widget.text,
13        w4d.event;
14 import g4d.glfw.cursor;
15 import gl3n.linalg;
16 
17 /// A handler that handles pressing buttons.
18 alias ButtonPressHandler = EventHandler!( void );
19 
20 /// A widget of button.
21 class ButtonWidget : TextWidget
22 {
23     ///
24     ButtonPressHandler onButtonPress;
25 
26     ///
27     override bool handleMouseButton ( MouseButton btn, bool status, vec2 pos )
28     {
29         if ( super.handleMouseButton( btn, status, pos ) ) {
30             return true;
31         }
32         if ( !style.isPointInside(pos) ) {
33             return false;
34         }
35         if ( btn == MouseButton.Left && !status ) {
36             handleButtonPress();
37             return true;
38         }
39         return false;
40     }
41 
42     ///
43     void handleButtonPress ()
44     {
45         onButtonPress.call();
46     }
47 
48     ///
49     override @property const(Cursor) cursor ()
50     {
51         return Cursor.Hand;
52     }
53 
54     ///
55     this ()
56     {
57         super();
58         textOriginRate = vec2(0.5,0.5);
59         textPosRate    = vec2(0.5,0.5);
60 
61         parseColorSetsFromFile!"colorset/button.yaml"( style );
62         style.box.margins     = Rect(1.mm);
63         style.box.paddings    = Rect(2.mm);
64         style.box.borderWidth = Rect(1.pixel);
65     }
66 
67     ///
68     override @property bool trackable () { return true; }
69     ///
70     override @property bool focusable () { return true; }
71 }