void Setup()
{
IMColorUtil.RGBToHSV(_color, out h, out s, out v);
circle = Resources.Load <Texture2D>("imCircle");
rightArrow = Resources.Load <Texture2D>("imRight");
leftArrow = Resources.Load <Texture2D>("imLeft");
button = Resources.Load <Texture2D>("imBorder");
buttonHighlighted = Resources.Load <Texture2D>("imBorderHighlighted");
previewStyle = new GUIStyle();
previewStyle.normal.background = Texture2D.whiteTexture;
labelStyle = new GUIStyle();
labelStyle.fontSize = 12;
hueTexture = CreateHueTexture(20, kHSVPickerSize);
hueStyle = new GUIStyle();
hueStyle.normal.background = hueTexture;
svTexture = CreateSVTexture(_color, kHSVPickerSize);
svStyle = new GUIStyle();
svStyle.normal.background = svTexture;
presetStyle = new GUIStyle();
presetStyle.normal.background = button;
presetHighlightedStyle = new GUIStyle();
presetHighlightedStyle.normal.background = buttonHighlighted;
}
Texture2D CreateHueTexture(int width, int height)
{
var tex = new Texture2D(width, height);
for (int y = 0; y < height; y++)
{
var h = 1f * y / height;
var color = IMColorUtil.HSVToRGB(h, 1f, 1f);
for (int x = 0; x < width; x++)
{
tex.SetPixel(x, y, color);
}
}
tex.Apply();
return(tex);
}
void DrawSVHandler(Rect rect, ref Color c)
{
const float size = 10f;
const float offset = 5f;
GUI.DrawTexture(new Rect(rect.x + s * rect.width - offset, rect.y + (1f - v) * rect.height - offset, size, size), circle);
var e = Event.current;
var p = e.mousePosition;
if (e.button == 0 && (e.type == EventType.MouseDown || e.type == EventType.MouseDrag) && rect.Contains(p))
{
s = (p.x - rect.x) / rect.width;
v = 1f - (p.y - rect.y) / rect.height;
c = IMColorUtil.HSVToRGB(h, s, v);
e.Use();
ClearPresetSelection();
}
}
void UpdateSVTexture(Color c, Texture2D tex)
{
float h, _s, _v;
IMColorUtil.RGBToHSV(c, out h, out _s, out _v);
var size = tex.width;
for (int y = 0; y < size; y++)
{
var v = 1f * y / size;
for (int x = 0; x < size; x++)
{
var s = 1f * x / size;
var color = IMColorUtil.HSVToRGB(h, s, v);
tex.SetPixel(x, y, color);
}
}
tex.Apply();
}
void DrawHueHandler(Rect rect, ref Color c)
{
const float size = 15f;
GUI.DrawTexture(new Rect(rect.x - size * 0.75f, rect.y + (1f - h) * rect.height - size * 0.5f, size, size), rightArrow);
GUI.DrawTexture(new Rect(rect.x + rect.width - size * 0.25f, rect.y + (1f - h) * rect.height - size * 0.5f, size, size), leftArrow);
var e = Event.current;
var p = e.mousePosition;
if (e.button == 0 && (e.type == EventType.MouseDown || e.type == EventType.MouseDrag) && rect.Contains(p))
{
h = 1f - (p.y - rect.y) / rect.height;
c = IMColorUtil.HSVToRGB(h, s, v);
UpdateSVTexture(c, svTexture);
e.Use();
ClearPresetSelection();
}
}
void DrawPresets(ref Color c)
{
const int presetSize = 16;
GUILayout.Label("Presets", labelStyle);
GUILayout.Space(2f);
var tmp = GUI.backgroundColor;
int n = preset.Colors.Count;
var e = Event.current;
for (int offset = 0, m = n / 10; offset <= m; offset++)
{
using (new GUILayout.HorizontalScope())
{
GUILayout.Space(1f);
var limit = Mathf.Min(n, (offset + 1) * 10);
for (int i = offset * 10; i < limit; i++)
{
var color = preset.Colors[i];
GUI.backgroundColor = color;
if (GUILayout.Button(" ", (i == selectedPreset) ? presetHighlightedStyle : presetStyle, GUILayout.Width(presetSize), GUILayout.Height(presetSize)))
{
switch (e.button)
{
case 0:
selectedPreset = i;
c = color;
IMColorUtil.RGBToHSV(c, out h, out s, out v);
UpdateSVTexture(c, svTexture);
break;
case 1:
{
preset.Colors.RemoveAt(i);
ClearPresetSelection();
return;
}
break;
}
}
GUILayout.Space(1f);
}
}
}
GUI.backgroundColor = tmp;
const int buttonWidth = 67, buttonHeight = 20;
using (new GUILayout.HorizontalScope()) {
if (GUILayout.Button("Save", GUILayout.Width(buttonWidth), GUILayout.Height(buttonHeight)))
{
preset.Save(c);
selectedPreset = preset.Colors.Count - 1;
}
if (selectedPreset >= 0 && GUILayout.Button("Remove", GUILayout.Width(buttonWidth), GUILayout.Height(buttonHeight)))
{
preset.Colors.RemoveAt(selectedPreset);
ClearPresetSelection();
}
}
}