keii.dev
A game framework written with osu! in mind.
1// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
2// See the LICENCE file in the repository root for full licence text.
3
4using osu.Framework.Allocation;
5using osu.Framework.Bindables;
6using osu.Framework.Graphics.Containers;
7using osu.Framework.Graphics.Shaders;
8using osu.Framework.Graphics.Shapes;
9using osu.Framework.Input.Events;
10using osuTK;
11
12namespace osu.Framework.Graphics.UserInterface
13{
14 public abstract partial class HSVColourPicker
15 {
16 public abstract class HueSelector : CompositeDrawable
17 {
18 public Bindable<float> Hue { get; } = new BindableFloat
19 {
20 MinValue = 0,
21 MaxValue = 1
22 };
23
24 /// <summary>
25 /// The body of the hue slider.
26 /// </summary>
27 protected readonly Container SliderBar;
28
29 private readonly Drawable nub;
30
31 protected HueSelector()
32 {
33 AutoSizeAxes = Axes.Y;
34 RelativeSizeAxes = Axes.X;
35
36 InternalChildren = new[]
37 {
38 SliderBar = new Container
39 {
40 Height = 30,
41 RelativeSizeAxes = Axes.X,
42 Child = new HueSelectorBackground
43 {
44 RelativeSizeAxes = Axes.Both
45 }
46 },
47 nub = CreateSliderNub().With(d =>
48 {
49 d.RelativeSizeAxes = Axes.Y;
50 d.RelativePositionAxes = Axes.X;
51 })
52 };
53 }
54
55 /// <summary>
56 /// Creates the nub which will be used for the hue slider.
57 /// </summary>
58 protected abstract Drawable CreateSliderNub();
59
60 protected override void LoadComplete()
61 {
62 base.LoadComplete();
63
64 Hue.BindValueChanged(_ => Scheduler.AddOnce(updateNubPosition), true);
65 }
66
67 private void updateNubPosition()
68 {
69 nub.Position = new Vector2(Hue.Value, 0);
70 }
71
72 protected override bool OnMouseDown(MouseDownEvent e)
73 {
74 handleMouseInput(e.ScreenSpaceMousePosition);
75 return true;
76 }
77
78 protected override bool OnDragStart(DragStartEvent e)
79 {
80 handleMouseInput(e.ScreenSpaceMousePosition);
81 return true;
82 }
83
84 protected override void OnDrag(DragEvent e)
85 {
86 handleMouseInput(e.ScreenSpaceMousePosition);
87 }
88
89 private void handleMouseInput(Vector2 mousePosition)
90 {
91 var localSpacePosition = ToLocalSpace(mousePosition);
92 Hue.Value = localSpacePosition.X / DrawWidth;
93 }
94
95 private class HueSelectorBackground : Box, ITexturedShaderDrawable
96 {
97 public new IShader TextureShader { get; private set; }
98 public new IShader RoundedTextureShader { get; private set; }
99
100 [BackgroundDependencyLoader]
101 private void load(ShaderManager shaders)
102 {
103 TextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, "HueSelectorBackground");
104 RoundedTextureShader = shaders.Load(VertexShaderDescriptor.TEXTURE_2, "HueSelectorBackgroundRounded");
105 }
106 }
107 }
108 }
109}