w4d.widget.popup.base 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.popup.base;
8 import w4d.widget.base,
9        w4d.widget.panel,
10        w4d.widget.root,
11        w4d.exception;
12 import gl3n.linalg;
13 
14 /// A base widget of popup.
15 class PopupWidget : RootWidget
16 {
17     /// WindowContext of the popup target.
18     protected WindowContext _objectContext;
19 
20     protected vec2 _pos, _size;
21 
22     ///
23     override void handlePopup ( bool opened, WindowContext w )
24     {
25         w.requestRedraw();
26 
27         if ( opened ) {
28             _objectContext = w;
29         } else {
30             _objectContext = null;
31         }
32     }
33 
34     ///
35     this ()
36     {
37         super();
38         _objectContext = null;
39 
40         _pos  = vec2(0,0);
41         _size = vec2(0,0);
42     }
43 
44     /// Moves the popup to the pos and resize to the size.
45     void move ( vec2 pos, vec2 size )
46     {
47         _pos  = pos;
48         _size = size;
49         requestLayout();
50     }
51     /// Closes the popup.
52     void close ()
53     {
54         enforce( _objectContext,
55                 "The popup is not opened yet." );
56         _objectContext.setPopup( null );
57     }
58 
59     ///
60     override vec2 layout ( vec2 rootlt, vec2 rootsz )
61     {
62         .Widget.layout( _pos, _size );
63 
64         const rootrb = rootlt + rootsz;
65 
66         const lt = style.translate;
67         const rb = lt + style.box.collisionSize;
68 
69         auto late = vec2(0,0);
70         if ( lt.x < rootlt.x ) {
71             late.x = rootlt.x - lt.x;
72         } else if ( rb.x > rootrb.x ) {
73             late.x = rootrb.x - rb.x;
74         }
75         if ( lt.y < rootlt.y ) {
76             late.y = rootlt.y - lt.y;
77         } else if ( rb.y > rootrb.y ) {
78             late.y = rootrb.y - rb.y;
79         }
80 
81         shift( late );
82         return vec2(0,0);
83     }
84 }