re.gfx.text source code

1 module re.gfx.text;
2 
3 import re.ecs;
4 import re.math;
5 import re.ng.diag;
6 import std.string;
7 static import raylib;
8 
9 /// renderable text
10 class Text : Component, Renderable2D {
11     private string _text;
12     /// text font
13     public raylib.Font font;
14     /// font size
15     public int size;
16     /// text color
17     public raylib.Color color;
18     private Vector2 _text_size;
19     private Vector2 _origin;
20     /// default font size
21     public enum default_size = 10;
22     private Align _horiz_align;
23     private Align _vert_align;
24 
25     /// alignment style
26     public enum Align {
27         /// left or top
28         Close,
29         /// center
30         Center,
31         /// right or bottom
32         Far
33     }
34 
35     /// create a new text
36     this(raylib.Font font, string text, int size, raylib.Color color) {
37         this._text = text;
38         this.font = font;
39         this.size = size;
40         this.color = color;
41         update_dimens();
42     }
43 
44     /// gets text string
45     @property string text() {
46         return _text;
47     }
48 
49     /// sets text string
50     @property string text(string value) {
51         _text = value;
52         update_dimens();
53         return value;
54     }
55 
56     @property Rectangle bounds() {
57         return RectangleExt.calculate_bounds(entity.position2, _origin,
58                 entity.transform.scale2, entity.transform.rotation, _text_size.x, _text_size.y);
59     }
60 
61     @property private int spacing() {
62         return size / default_size;
63     }
64 
65     /// default font (builtin to raylib)
66     @property public static raylib.Font default_font() {
67         return raylib.GetFontDefault();
68     }
69 
70     private void update_dimens() {
71         _text_size = raylib.MeasureTextEx(font, toStringz(_text), size, spacing);
72         // calculate origin
73         auto ori_x = 0.0;
74         auto ori_y = 0.0;
75         if (_horiz_align == Align.Close)
76             ori_x = 0;
77         else if (_horiz_align == Align.Center)
78             ori_x = _text_size.x / 2;
79         else
80             ori_x = _text_size.x;
81         if (_vert_align == Align.Close)
82             ori_y = 0;
83         else if (_vert_align == Align.Center)
84             ori_y = _text_size.y / 2;
85         else
86             ori_y = _text_size.y;
87         _origin = Vector2(ori_x, ori_y);
88     }
89 
90     public void set_align(Align horiz, Align vert) {
91         _horiz_align = horiz;
92         _vert_align = vert;
93         update_dimens();
94     }
95 
96     void render() {
97         raylib.DrawTextEx(font, toStringz(_text), entity.position2 - _origin, size, spacing, color);
98     }
99 
100     void debug_render() {
101         DebugRender.default_debug_render(this);
102     }
103 }