fluid.label source code

1 ///
2 module fluid.label;
3 
4 import fluid.node;
5 import fluid.text;
6 import fluid.utils;
7 import fluid.style;
8 import fluid.backend;
9 
10 import fluid.io.canvas;
11 
12 @safe:
13 
14 /// A label can be used to display text on the screen.
15 alias label = simpleConstructor!Label;
16 
17 /// ditto
18 class Label : Node {
19 
20     CanvasIO canvasIO;
21 
22     public {
23 
24         /// Text of this label.
25         Text text;
26 
27         alias value = text;
28 
29         /// If true, the content of the label should not be wrapped into new lines if it's too long to fit into one.
30         bool isWrapDisabled;
31 
32     }
33 
34     this(Rope text) {
35 
36         this.text = Text(this, text);
37 
38     }
39 
40     this(const(char)[] text) {
41 
42         this.text = Text(this, text);
43 
44     }
45 
46     /// Set wrap on for this node.
47     This disableWrap(this This = Label)() return {
48 
49         isWrapDisabled = true;
50         return cast(This) this;
51 
52     }
53 
54     /// Set wrap off for this node
55     This enableWrap(this This = Label)() return {
56 
57         isWrapDisabled = false;
58         return cast(This) this;
59 
60     }
61 
62     bool isEmpty() const {
63 
64         return text.length == 0;
65 
66     }
67 
68     protected override void resizeImpl(Vector2 available) {
69 
70         import std.math;
71 
72         use(canvasIO);
73 
74         text.resize(canvasIO, available, !isWrapDisabled);
75         minSize = text.size;
76 
77     }
78 
79     protected override void drawImpl(Rectangle outer, Rectangle inner) {
80 
81         const style = pickStyle();
82         style.drawBackground(tree.io, canvasIO, outer);
83         text.draw(canvasIO, style, inner.start);
84 
85     }
86 
87     override string toString() const {
88 
89         import std.range;
90         import std.format;
91 
92         return format!"Label(%(%s%))"(only(text.toString));
93 
94     }
95 
96 }
97 
98 ///
99 unittest {
100 
101     // Label takes just a single argument: the text to display
102     auto myLabel = label("Hello, World!");
103 
104     // You can access and change label text
105     myLabel.text ~= " It's a nice day today!";
106 
107     // Text will automatically wrap if it's too long to fit, but you can toggle it off
108     myLabel.isWrapDisabled = true;
109 
110 }