public void DrawCaret(ICanvas c, CaretShape shape = CaretShape.UpArrow)
{
if (!(Caret is CaretHandle caret))
{
return;
}
var path = c.GetPath();
if (!(Display.PointForIndex(TypesettingContext.Instance, InsertionIndex) is PointF cursorPosition))
{
return;
}
cursorPosition.Y *= -1; //inverted canvas, blah blah
var point = caret.InitialPoint.Plus(cursorPosition);
path.BeginRead(1);
path.Foreground = caret.ActualColor;
path.MoveTo(point.X, point.Y);
switch (shape)
{
default:
case CaretShape.UpArrow:
ReadOnlySpan <PointF> s = stackalloc PointF[4] {
caret.NextPoint1, caret.NextPoint2,
caret.NextPoint3, caret.FinalPoint
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
case CaretShape.IBeam:
s = stackalloc PointF[4] {
new PointF(caret.Bounds.Width / 16, 0),
new PointF(caret.Bounds.Width / 16, -caret.Bounds.Height),
new PointF(-caret.Bounds.Width / 16, -caret.Bounds.Height),
new PointF(-caret.Bounds.Width / 16, 0),
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
}
path.CloseContour();
path.EndRead();
}
public void DrawCaret(ICanvas canvas, Structures.Color color, CaretShape shape)
{
if (!(Caret is CaretHandle caret))
{
return;
}
if (!(Display.PointForIndex(TypesettingContext.Instance, InsertionIndex) is PointF cursorPosition))
{
return;
}
cursorPosition.Y *= -1; //inverted canvas, blah blah
var path = canvas.GetPath();
path.BeginRead(1);
path.Foreground = color;
path.MoveTo(cursorPosition.X, cursorPosition.Y);
switch (shape)
{
case CaretShape.IBeam:
ReadOnlySpan <PointF> s = stackalloc PointF[4] {
new PointF(caret.Width / 16, 0),
new PointF(caret.Width / 16, -caret.Height),
new PointF(-caret.Width / 16, -caret.Height),
new PointF(-caret.Width / 16, 0),
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
case CaretShape.UpArrow:
s = stackalloc PointF[4] {
new PointF(caret.Width / 2, caret.Height / 4),
new PointF(caret.Width / 2, caret.Height),
new PointF(-caret.Width / 2, caret.Height),
new PointF(-caret.Width / 2, caret.Height / 4)
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
}
path.CloseContour();
path.EndRead();
}
}
public void DrawCaret(ICanvas canvas, Structures.Color color, CaretShape shape)
{
if (!ShowCaret)
{
return;
}
var cursorPosition = Display.PointForIndex(TypesettingContext.Instance, InsertionIndex) ?? Display.Position;
cursorPosition.Y *= -1; //inverted canvas, blah blah
var path = canvas.GetPath();
path.BeginRead(1);
path.Foreground = color;
path.MoveTo(cursorPosition.X, cursorPosition.Y);
switch (shape)
{
case CaretShape.IBeam:
ReadOnlySpan <PointF> s = stackalloc PointF[4] {
new PointF(Font.PointSize / 2 / 16, 0),
new PointF(Font.PointSize / 2 / 16, -Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 16, -Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 16, 0),
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
case CaretShape.UpArrow:
s = stackalloc PointF[4] {
new PointF(Font.PointSize / 2 / 2, Font.PointSize * 2 / 3 / 4),
new PointF(Font.PointSize / 2 / 2, Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 2, Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 2, Font.PointSize * 2 / 3 / 4)
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
}
path.CloseContour();
path.EndRead();
}
}
public void DrawCaret(ICanvas canvas, Color color, CaretShape shape)
{
if (CaretState != MathKeyboardCaretState.Shown || Display is null)
{
return;
}
var cursorPosition = Display.PointForIndex(TypesettingContext.Instance, InsertionIndex) ?? Display.Position;
cursorPosition.Y *= -1; //inverted canvas, blah blah
using var path = canvas.StartNewPath();
path.Foreground = color;
path.MoveTo(cursorPosition.X, cursorPosition.Y);
switch (shape)
{
case CaretShape.IBeam:
ReadOnlySpan <PointF> s = stackalloc PointF[4] {
new PointF(Font.PointSize / 2 / 16, 0),
new PointF(Font.PointSize / 2 / 16, -Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 16, -Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 16, 0),
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
case CaretShape.UpArrow:
s = stackalloc PointF[4] {
new PointF(Font.PointSize / 2 / 2, Font.PointSize * 2 / 3 / 4),
new PointF(Font.PointSize / 2 / 2, Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 2, Font.PointSize * 2 / 3),
new PointF(-Font.PointSize / 2 / 2, Font.PointSize * 2 / 3 / 4)
};
foreach (var p in s)
{
path.LineTo(p.X + cursorPosition.X, p.Y + cursorPosition.Y);
}
break;
}
path.CloseContour();
}
}
public static void BindDisplay(this MathKeyboard keyboard,
SKCanvasView view, MathPainter settings, SKColor caretColor,
CaretShape caretShape = CaretShape.IBeam, SKStrokeCap cap = SKStrokeCap.Butt)
{
view.EnableTouchEvents = true;
view.Touch +=
(sender, e) => {
if (e.ActionType == SKTouchAction.Pressed)
{
keyboard.MoveCaretToPoint(new System.Drawing.PointF(e.Location.X, e.Location.Y));
}
};
keyboard.RedrawRequested += (_, __) => view.InvalidateSurface();
view.PaintSurface +=
(sender, e) => {
var c = e.Surface.Canvas;
c.Clear();
MathPainter.DrawDisplay(settings, keyboard.Display, c);
keyboard.DrawCaret(new SkiaCanvas(c, cap, AntiAlias.Enable), caretColor.FromNative(), caretShape);
};
}
public void DrawCaret(global::SkiaSharp.SKCanvas canvas, CaretShape shape = CaretShape.UpArrow) => Keyboard.DrawCaret(new SkiaSharp.SkiaCanvas(canvas, global::SkiaSharp.SKStrokeCap.Butt, false), shape);
