public MainPage()
{
InitializeComponent();
global::SkiaSharp.Views.Forms.SKCanvasView canvasView = canvas;
CSharpMath.Forms.MathKeyboard keyboard = b;
var painter = new CSharpMath.SkiaSharp.MathPainter
{ /*set all properties aside from LocalTypefaces, FontSize, LineStyle,
* MathList, LaTeX and Source (these are ignored)*/
};
keyboard.RedrawRequested += (sender, e) => canvasView.InvalidateSurface();
canvasView.PaintSurface += (sender, e) => {
e.Surface.Canvas.Clear();
//for any DrawDisplay overload, arguments after canvas are the same as Draw
CSharpMath.SkiaSharp.MathPainter.DrawDisplay(painter, keyboard.Display, e.Surface.Canvas);
keyboard.DrawCaret(e.Surface.Canvas, CSharpMath.Rendering.CaretShape.IBeam);
};
}
private void Canvas_PaintSurface(object sender, SkiaSharp.Views.UWP.SKPaintSurfaceEventArgs e)
{
e.Surface.Canvas.Clear();
// Handle the text color
byte r = 0, g = 0, b = 0, a = 255;
if (Foreground is SolidColorBrush)
{
var fore = (Foreground as SolidColorBrush).Color;
r = fore.R;
g = fore.G;
b = fore.B;
a = fore.A;
}
SkiaSharp.SKColor textColor = new SkiaSharp.SKColor(r, g, b, a);
// Handle the background color
r = 255; g = 255; b = 255; a = 255;
if (Background is SolidColorBrush)
{
var back = (Background as SolidColorBrush).Color;
r = back.R;
g = back.G;
b = back.B;
a = back.A;
}
SkiaSharp.SKColor backColor = new SkiaSharp.SKColor(r, g, b, a);
e.Surface.Canvas.DrawColor(backColor);
var painter = new CSharpMath.SkiaSharp.MathPainter
{
LaTeX = LaTeXString,
FontSize = (float)FontSize,
TextColor = textColor,
};
painter.Draw(e.Surface.Canvas);
}
