/// <summary>Returns the measurements of a ColourWheel that fits in the given width/height/orientation</summary>
public static Measurements Measure(int width, int height, EParts parts, int slider_width, bool vertical)
{
bool drawv = (parts & EParts.VSlider) != 0;
bool drawa = (parts & EParts.ASlider) != 0;
int slider_space = 0 + (drawv ? slider_width * 3 / 2 : 0) + (drawa ? slider_width * 3 / 2 : 0);
int w = Math.Max(0, width - (vertical ? 0 : slider_space));
int h = Math.Max(0, height - (vertical ? slider_space : 0));
int min = Math.Min(w, h);
var meas = new Measurements();
meas.Width = min + (vertical ? 0 : slider_space);
meas.Height = min + (vertical ? slider_space : 0);
meas.Radius = min * 0.5f;
meas.Centre = new Point((int)Math.Ceiling(meas.Radius), (int)Math.Ceiling(meas.Radius));
meas.Wheel = new Rectangle(0, 0, meas.Centre.X * 2, meas.Centre.Y * 2);
using (var bm = new Bitmap(1, 1))
using (var gfx = Graphics.FromImage(bm))
{
gfx.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
Func <Graphics, int, int, string, Rectangle> LabelBounds = (g, x, y, label) =>
{
var sz = g.MeasureString(label, SystemFonts.DefaultFont, slider_width / 2);
return(new Rectangle(
(int)(x + (vertical ? 0f : (slider_width - sz.Width) * 0.5f)),
(int)(y + (vertical ? (slider_width - sz.Height) * 0.5f : 0f)),
(int)Math.Ceiling(sz.Width),
(int)Math.Ceiling(sz.Height)));
};
Func <int, int, Rectangle, Rectangle> SliderBounds = (x, y, label_bounds) =>
{
return(new Rectangle(
x + (vertical ? label_bounds.Width + 2 : 0),
y + (vertical ? 0 : label_bounds.Height + 2),
vertical ? meas.Width - label_bounds.Width - 2 : slider_width,
vertical ? slider_width : meas.Height - label_bounds.Height - 2));
};
var ofs = (vertical ? meas.Wheel.Width : meas.Wheel.Height) + slider_width / 5;
if ((parts & EParts.VSlider) != 0)
{
meas.VLabel = LabelBounds(gfx, vertical ? 0 : ofs, vertical ? ofs : 0, ValueLabel);
meas.VSlider = SliderBounds(vertical ? 0 : ofs, vertical ? ofs : 0, meas.VLabel);
ofs += slider_width * 3 / 2;
}
if ((parts & EParts.ASlider) != 0)
{
meas.ALabel = LabelBounds(gfx, vertical ? 0 : ofs, vertical ? ofs : 0, AlphaLabel);
meas.ASlider = SliderBounds(vertical ? 0 : ofs, vertical ? ofs : 0, meas.ALabel);
}
return(meas);
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
Capture = false;
switch (m_selected_part)
{
case EParts.Wheel: SelectHueAndSaturation(e.X, e.Y); break;
case EParts.VSlider: SelectBrightness(e.X, e.Y); break;
case EParts.ASlider: SelectAlpha(e.X, e.Y); break;
}
RaiseColourSelection(e);
m_selected_part = EParts.None;
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
if ((m_selected_part = PartHitTest(e.X, e.Y)) == EParts.None)
{
return;
}
RaiseColourSelection(e);
switch (m_selected_part)
{
case EParts.Wheel: SelectHueAndSaturation(e.X, e.Y); break;
case EParts.VSlider: SelectBrightness(e.X, e.Y); break;
case EParts.ASlider: SelectAlpha(e.X, e.Y); break;
}
Capture = true;
}
protected override void OnMouseUp(MouseButtonEventArgs e)
{
base.OnMouseUp(e);
var pt = e.GetPosition(this);
ReleaseMouseCapture();
switch (m_selected_part)
{
case EParts.Wheel: SelectHueAndSaturation(pt); break;
case EParts.VSlider: SelectBrightness(pt); break;
case EParts.ASlider: SelectAlpha(pt); break;
}
ColourSelection?.Invoke(this, e);
m_selected_part = EParts.None;
}
protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
var pt = e.GetPosition(this);
m_selected_part = PartHitTest(pt.X, pt.Y);
if (m_selected_part == EParts.None)
{
return;
}
ColourSelection?.Invoke(this, e);
switch (m_selected_part)
{
case EParts.Wheel: SelectHueAndSaturation(pt); break;
case EParts.VSlider: SelectBrightness(pt); break;
case EParts.ASlider: SelectAlpha(pt); break;
}
CaptureMouse();
}
