w4d.widget.popup.menu 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.menu;
8 import w4d.layout.lineup,
9        w4d.parser.colorset,
10        w4d.style.rect,
11        w4d.style.scalar,
12        w4d.task.window,
13        w4d.widget.popup.base,
14        w4d.widget.wrapper,
15        w4d.event;
16 import g4d.ft.font;
17 import gl3n.linalg;
18 
19 /// A widget of popup menu.
20 class PopupMenuWidget : PopupWidget
21 {
22     ///
23     override bool handleMouseButton ( MouseButton b, bool status, vec2 pos )
24     {
25         if ( super.handleMouseButton(b,status,pos) ) return true;
26 
27         if ( status && !style.isPointInside( pos ) ) {
28             close();
29             return true;
30         }
31         return false;
32     }
33 
34     ///
35     this ()
36     {
37         super();
38 
39         parseColorSetsFromFile!"colorset/menu.yaml"( style );
40         setLayout!VerticalLineupLayout;
41         style.box.borderWidth = Rect(1.pixel);
42     }
43     mixin DisableModifyChildren;
44 
45     /// Adds the item.
46     void addItem ( MenuItemWidget i )
47     {
48         i._parentMenu = this;
49         super.addChild( i );
50     }
51     /// Removes the item.
52     void removeItem ( MenuItemWidget i )
53     {
54         super.removeChild( i );
55     }
56     /// Removes all items.
57     void removeAllItems ()
58     {
59         super.removeAllChildren();
60     }
61 }
62 
63 /// A handler that handles pressing menu items.
64 alias PressHandler = EventHandler!( bool );
65 
66 /// A widget of menu item.
67 class MenuItemWidget : WrapperWidget
68 {
69     protected PopupMenuWidget _parentMenu;
70 
71     ///
72     PressHandler onPress;
73 
74     ///
75     override bool handleMouseButton ( MouseButton btn, bool status, vec2 pos )
76     {
77         if ( super.handleMouseButton(btn,status,pos) ) return true;
78 
79         if ( !style.isPointInside( pos ) ) return false;
80         if ( btn == MouseButton.Left && !status ) {
81             if ( onPress.call() ) {
82                 _parentMenu.close();
83             }
84             return true;
85         }
86         return false;
87     }
88 
89     ///
90     this ()
91     {
92         super();
93 
94         _parentMenu = null;
95 
96         parseColorSetsFromFile!"colorset/menuitem.yaml"( style );
97         setLayout!HorizontalLineupLayout;
98         style.box.paddings = Rect(1.mm);
99     }
100 }