public ColorGradient()
{
var colorGradient = UserInterface.GetElement("ColorGradient");
if (colorGradient != null)
{
throw new Exception("Only one color picker can currently exist at once. This is a limitation I intend to remove soon.");
}
this.Program = Shaders.GradientShader;
this.Program.Use();
this.Program["hue"].SetValue(new Vector3(h, 0, 0));
this.Program["sel"].SetValue(new Vector2(selx, sely));
this.gradientQuad = Geometry.CreateQuad(this.Program, Vector2.Zero, new Vector2(150, 150));
this.RelativeTo = Corner.TopLeft;
this.Position = new Point(30, 50);
this.Size = new Point(150, 150);
this.Name = "ColorGradient";
// set up the events for the mouse to move the indicator around
this.OnMouseDown = new OnMouse((sender, eventArgs) =>
{
mouseDown = (eventArgs.Button == MouseButton.Left);
UpdateMousePosition(eventArgs.Location.X, eventArgs.Location.Y);
});
this.OnMouseUp = new OnMouse((sender, eventArgs) => mouseDown = (eventArgs.Button == MouseButton.Left ? false : mouseDown));
this.OnMouseLeave = new OnMouse((sender, eventArgs) => mouseDown = false);
this.OnMouseMove = new OnMouse((sender, eventArgs) => UpdateMousePosition(eventArgs.Location.X, eventArgs.Location.Y));
UpdateColor();
}
public ColorGradient()
{
if (UserInterface.GetElement(nameof(ColorGradient)) != null)
{
throw new Exception("Only one color picker can currently exist at once. This is a limitation I intend to remove soon.");
}
this.Program = Shaders.GradientShader;
this.Program.Use();
this.Program["hue"].SetValue(new Vector3(this.h, 0.0f, 0.0f));
this.Program["sel"].SetValue(new Vector2(this.selx, this.sely));
this.gradientQuad = Geometry.CreateQuad(this.Program, Vector2.Zero, new Vector2(150f, 150f));
this.RelativeTo = Corner.TopLeft;
this.Position = new Point(30, 50);
this.Size = new Point(150, 150);
this.Name = nameof(ColorGradient);
this.OnMouseDown = (OnMouse)((sender, eventArgs) =>
{
this.mouseDown = eventArgs.Button == MouseButton.Left;
this.UpdateMousePosition(eventArgs.Location.X, eventArgs.Location.Y);
});
this.OnMouseUp = (OnMouse)((sender, eventArgs) => this.mouseDown = eventArgs.Button != MouseButton.Left && this.mouseDown);
this.OnMouseLeave = (OnMouse)((sender, eventArgs) => this.mouseDown = false);
this.OnMouseMove = (OnMouse)((sender, eventArgs) => this.UpdateMousePosition(eventArgs.Location.X, eventArgs.Location.Y));
this.UpdateColor();
}
private void UpdateMousePosition(int x, int y)
{
if (!this.mouseDown)
{
return;
}
float num = (float)(UserInterface.Height - y - this.CorrectedPosition.Y) / (float)this.Size.Y;
this.Program.Use();
this.Program["hue"].SetValue((float)(UserInterface.Height - y - this.CorrectedPosition.Y));
UIElement element = UserInterface.GetElement("ColorGradient");
if (element == null)
{
return;
}
((ColorGradient)element).Hue = num;
}
private void UpdateMousePosition(int x, int y)
{
if (!mouseDown)
{
return;
}
// calculate the selected hue based on the mouse position
float hue = ((UserInterface.Height - y) - CorrectedPosition.Y) / (float)Size.Y;
Program.Use();
Program["hue"].SetValue((float)((UserInterface.Height - y) - CorrectedPosition.Y));
// asks the user interface for the applicable color gradient
// this will need to be modified if multiple color gradients are on the screen at once
// which I can't imagine happening currently, but who knows
var colorGradient = UserInterface.GetElement("ColorGradient");
if (colorGradient != null)
{
((ColorGradient)colorGradient).Hue = hue;
}
}