private void Canvas_PaintSurface(object sender, SkiaSharp.Views.Forms.SKPaintSurfaceEventArgs e)
{
var aint = new SKPaint()
{
Color = new SKColor(255, 255, 255, 0),
IsStroke = false
};
e.Surface.Canvas.Clear();
if (selCoord == null)
{
return;
}
var pt = (UniPoint)selCoord;
var uc = SelectedColor.GetUniColor();
uc = ((uint)uc) ^ 0x00ffffff;
pt.X *= ((e.Info.Width / Width));
pt.Y *= ((e.Info.Height / Height));
aint.Color = new SKColor(uc);
aint.IsStroke = true;
aint.StrokeWidth = 6;
e.Surface.Canvas.DrawCircle(new SKPoint((float)pt.X, (float)pt.Y), 32, aint);
}
public ColorPicker()
{
InitializeComponent();
vm = new ColorViewModel(SelectedColor.GetUniColor());
vm.PropertyChanged += Vm_PropertyChanged;
ControlGrid.DataContext = vm;
Rearrange();
}
private void SetSelectedColor(UniColor?selc = null)
{
UniColor clr;
string cname;
if (selc != null)
{
clr = (UniColor)selc;
}
else
{
clr = SelectedColor.GetUniColor();
}
NamedColor nc;
if (SnapToNamedColor)
{
nc = NamedColor.GetClosestColor(clr, 0.05, false);
}
else
{
nc = NamedColor.FindColor(clr);
}
if (nc != null)
{
cname = nc.Name;
clr = nc.Color;
}
else
{
cname = clr.ToString("rwH");
}
if (SelectedColor != clr.GetWinUIColor())
{
SelectedColor = clr.GetWinUIColor();
}
if (SelectedColorName != cname)
{
SelectedColorName = cname;
}
RenderPickerZone();
}
private void SetSelectedColor(UniColor?selc = null)
{
UniColor clr;
string cname;
if (selc != null)
{
clr = (UniColor)selc;
}
else
{
clr = SelectedColor.GetUniColor();
}
NamedColor nc;
if (SnapToNamedColor)
{
nc = NamedColor.GetClosestColor(clr, 0.05, false);
}
else
{
nc = NamedColor.FindColor(clr);
}
if (nc != null)
{
cname = nc.Name;
clr = nc.Color;
}
else
{
cname = clr.GetXamarinColor().ToHex();
}
if (SelectedColor != clr.GetXamarinColor())
{
SelectedColor = clr.GetXamarinColor();
}
if (SelectedColorName != cname)
{
SelectedColorName = cname;
}
}
private void RenderPickerZone(bool force = false, bool hide = false)
{
var uc = SelectedColor.GetUniColor();
if (_container == null)
{
return;
}
if (selCoord == null || uc == UniColor.Empty || force || hide)
{
if (currentShape != null)
{
try
{
if (_container.Children.Contains(currentShape))
{
_container.Children.Remove(currentShape);
}
}
catch
{
}
currentShape = null;
currentGeo = null;
currentSprite = null;
GC.Collect(0);
}
if (selCoord == null || uc == UniColor.Empty || hide)
{
return;
}
}
var pt = (UniPoint)selCoord;
uc = ((uint)uc) ^ 0x00ffffff;
var comp = _container.Compositor;
if (currentShape != null)
{
currentSprite.StrokeBrush = comp.CreateColorBrush(uc.GetWinUIColor());
currentShape.Offset = new Vector3((float)pt.X - 10, (float)pt.Y - 10, 0);
return;
}
var ellipseGeo = comp.CreateEllipseGeometry();
ellipseGeo.Radius = new Vector2(8f, 8f);
var spriteShape = comp.CreateSpriteShape(ellipseGeo);
ellipseGeo.Center = new Vector2(10f, 10f);
spriteShape.StrokeThickness = 1.35f;
spriteShape.StrokeBrush = comp.CreateColorBrush(uc.GetWinUIColor());
var shapeVisual = comp.CreateShapeVisual();
shapeVisual.CompositeMode = CompositionCompositeMode.DestinationInvert;
shapeVisual.Shapes.Add(spriteShape);
shapeVisual.Offset = new Vector3((float)pt.X - 10, (float)pt.Y - 10, 0);
shapeVisual.Size = new Vector2(20f, 20f);
_container.Children.InsertAtTop(shapeVisual);
currentShape = shapeVisual;
currentSprite = spriteShape;
currentGeo = ellipseGeo;
}
