anchovy.gui.tooltipmanager source code

1 /**
2 Copyright: Copyright (c) 2014 Andrey Penechko.
3 License: a$(WEB boost.org/LICENSE_1_0.txt, Boost License 1.0).
4 Authors: Andrey Penechko.
5 */
6 
7 module anchovy.gui.tooltipmanager;
8 
9 import anchovy.gui;
10 
11 struct TooltipManager
12 {
13 private:
14 	GuiContext _context;
15 
16 	Widget _tooltip;
17 
18 public:
19 
20 	@disable this();
21 
22 	this(GuiContext context)
23 	{
24 		_context = context;
25 	}
26 
27 	void onWidgetHovered(Widget widget)
28 	{
29 		if (widget is null)
30 		{
31 			hideTooltip();
32 
33 			return;
34 		}
35 
36 		if (widget.hasProperty("tooltip"))
37 		{
38 			showTooltip(widget.coercePropertyAs!("tooltip", string),
39 				_context.eventDispatcher.lastPointerPosition() + ivec2(0, 20));
40 		}
41 		else
42 		{
43 			hideTooltip();
44 		}
45 	}
46 
47 	void showTooltip(string text, ivec2 pos)
48 	{
49 		if (_tooltip is null)
50 		{
51 			_tooltip = _context.getWidgetById("tooltip");
52 			if (_tooltip is null)
53 			{
54 				_tooltip = _context.createWidget("tooltip");
55 			}
56 		}
57 
58 		_tooltip["text"] = text;
59 		_tooltip["position"] = pos;
60 		_context.overlay.addChild(_tooltip);
61 	}
62 
63 	void hideTooltip()
64 	{
65 		_context.overlay.removeChild(_tooltip);
66 	}
67 }