plot2d.chart.base source code

1 module plot2d.chart.base;
2 
3 public import plot2d.chart.types;
4 public import plot2d.drawable;
5 
6 ///
7 interface Chart : Drawable
8 {
9     @property
10     {
11         ///
12         ref const(Viewport) viewport() const;
13         ///
14         bool visible() const;
15     }
16 
17     /// update buffered data and viewport
18     void update();
19 }
20 
21 ///
22 class BaseChart(T) : Chart, Stylized
23 {
24     mixin StylizedHelper;
25 protected:
26     ///
27     Viewport vp;
28 
29     Appender!(Elem[]) buffer;
30     BufferFiller fillData;
31 
32     abstract void expandViewport(ref const Elem val, ref bool[2] inited);
33 
34 public:
35 
36     alias Elem = T;
37     alias BufferFiller = void delegate(ref Appender!(Elem[]));
38 
39     this(BufferFiller fillData) { this.fillData = fillData; }
40 
41     override const @property
42     {
43         bool visible() { return !buffer.data.empty; }
44         ref const(Viewport) viewport() { return vp; }
45     }
46 
47     ///
48     override void update()
49     {
50         buffer.clear();
51         vp = Viewport(DimSeg(0, 1), DimSeg(0, 1));
52 
53         fillData(buffer);
54 
55         if (buffer.data.length == 0)
56         {
57             .warning("buffer is empty");
58             return;
59         }
60 
61         bool[2] inited;
62         foreach (ref const t; buffer.data)
63             expandViewport(t, inited);
64     }
65 
66     ///
67     abstract void draw(Ctx cr, Trtor tr);
68 }