private void DrawFormattedTextCore(SystemMedia.FormattedText formattedText, Vector2D origin, double angle = 0)
{
var originScreenPoint = _canvasProxy.ToScreen(origin);
var nativeOriginScreenPoint = Vector2DAdapter.ConvertToSystemPoint(originScreenPoint);
//若偏转角度数不为圆周整数整除,则应用偏转角变化;
if (angle % Math.PI * 2 != 0)
{
var rotateTransform = new SystemMedia.RotateTransform {
Angle = Extension.RadToDeg(angle),
CenterX = nativeOriginScreenPoint.X,
CenterY = nativeOriginScreenPoint.Y
};
//推入;
DrawingContext.PushTransform(rotateTransform);
DrawingContext.DrawText(formattedText, nativeOriginScreenPoint);
//出栈;
DrawingContext.Pop();
}
else
{
DrawingContext.DrawText(formattedText, nativeOriginScreenPoint);
}
}
/// <summary>
/// 以视图坐标为标准,绘制椭圆;
/// </summary>
/// <param name="rectangle">以视图坐标为准的矩形</param>
/// <param name="brush">填充色</param>
/// <param name="pen">笔</param>
public void NativeDrawEllipse(Brush brush, Pen pen, Vector2D center, double radiusX, double radiusY)
{
if (center == null)
{
throw new ArgumentNullException(nameof(center));
}
var centerPoint = Vector2DAdapter.ConvertToSystemPoint(center);
DrawingContext.DrawEllipse(
BrushAdapter.ConvertToSystemBrush(brush),
PenAdapter.ConverterToSystemPen(pen),
centerPoint,
radiusX,
radiusY
);
}
/// <summary>
/// 以视图坐标为标准,绘制矩形;
/// </summary>
/// <param name="rectangle">以视图坐标为准的矩形</param>
/// <param name="brush">填充色</param>
/// <param name="pen">笔</param>
public void NativeDrawRectangle(Rectangle2D2 rectangle, Brush brush, Pen pen)
{
if (rectangle == null)
{
throw new ArgumentNullException(nameof(rectangle));
}
ValidateDrawingContext();
var vertexes = rectangle.GetVertexes();
NativeDrawFill(
vertexes.Select(p => Vector2DAdapter.ConvertToSystemPoint(p)),
BrushAdapter.ConvertToSystemBrush(brush),
PenAdapter.ConverterToSystemPen(pen)
);
}
/// <summary>
/// 绘制文字;
/// </summary>
/// <param name="text"></param>
/// <param name="emSize"></param>
/// <param name="foreground"></param>
/// <param name="origin"></param>
public void DrawText(string text, double emSize, Brush foreground, Vector2D origin, double angle = 0)
{
ValidateDrawingContext();
var originScreenPoint = _canvasProxy.ToScreen(origin);
var nativeOriginScreenPoint = Vector2DAdapter.ConvertToSystemPoint(originScreenPoint);
var ft = new SystemMedia.FormattedText(
text,
System.Globalization.CultureInfo.CurrentCulture,
FlowDirection.LeftToRight, TypeFace,
emSize,
BrushAdapter.ConvertToSystemBrush(foreground)
);
DrawFormattedTextCore(ft, origin, angle);
}
/// <summary>
/// 以视图坐标为标准,绘制线段;
/// </summary>
/// <param name="rectangle">以视图坐标为准的矩形</param>
/// <param name="brush">填充色</param>
/// <param name="pen">笔</param>
public void NativeDrawLine(Pen pen, Line2D line2D)
{
if (pen == null)
{
return;
}
if (line2D == null)
{
throw new ArgumentNullException(nameof(line2D));
}
ValidateDrawingContext();
//平台转换后再进行绘制;
DrawingContext.DrawLine(
PenAdapter.ConverterToSystemPen(pen),
Vector2DAdapter.ConvertToSystemPoint(line2D.Start),
Vector2DAdapter.ConvertToSystemPoint(line2D.End)
);
}
/// <summary>
/// 绘制线段;
/// </summary>
/// <param name="pen"></param>
/// <param name="line"></param>
public void DrawLine(Pen pen, Line2D line)
{
if (pen == null)
{
return;
}
if (line == null)
{
throw new ArgumentNullException(nameof(line));
}
ValidateDrawingContext();
var screenPoint1 = _canvasProxy.ToScreen(line.Start);
var screenPoint2 = _canvasProxy.ToScreen(line.End);
//平台转换后再进行绘制;
DrawingContext.DrawLine(
PenAdapter.ConverterToSystemPen(pen),
Vector2DAdapter.ConvertToSystemPoint(screenPoint1),
Vector2DAdapter.ConvertToSystemPoint(screenPoint2)
);
}
/// <summary> /// 从坐标节点转换为以当前画布视图为标准的屏幕(系统)节点; /// </summary> /// <returns></returns> private Point ConvertVectorToScreenPoint(Vector2D point) => Vector2DAdapter.ConvertToSystemPoint(_canvasProxy.ToScreen(point));
public Vector2D GetNativePosition()
{
return(Vector2DAdapter.ConverterToVector2D(
SystemInput.Mouse.GetPosition(_inputElement)
));
}
