/// <summary>
/// 绘制未完成的编辑线段状态;
/// </summary>
/// <param name="canvas"></param>
/// <param name="canvasProxy"></param>
private void DrawEditingLineState(ICanvas canvas, ICanvasScreenConvertable canvasProxy)
{
//绘制未完成状态;
var editingLine = new Line2D(MousePositionTracker.LastMouseDownPosition, MousePositionTracker.CurrentHoverPosition);
LineDrawExtensions.DrawEditingLine(canvas, canvasProxy, editingLine);
}
public override void Draw(ICanvas canvas, ICanvasScreenConvertable canvasProxy)
{
//绘制与RelatedLine2D两个端点的关系;
var lineWithStart = new Line2D(RelatedLine2D.Start, Position);
var lineWidthEnd = new Line2D(Position, RelatedLine2D.End);
LineDrawExtensions.DrawEditingLineOutLines(canvas, canvasProxy, lineWithStart);
LineDrawExtensions.DrawEditingLineLengthString(canvas, canvasProxy, lineWithStart);
LineDrawExtensions.DrawEditingLineOutLines(canvas, canvasProxy, lineWidthEnd);
LineDrawExtensions.DrawEditingLineLengthString(canvas, canvasProxy, lineWidthEnd);
base.Draw(canvas, canvasProxy);
}
public override void Draw(ICanvas canvas, ICanvasScreenConvertable canvasProxy)
{
var line2D = GetPreviewLine2D(MousePositionTracker.CurrentHoverPosition);
line2D = line2D ?? Line2D;
var direction = line2D.Direction;
if (direction == null)
{
return;
}
var vDir = direction.X > 0 ? new Vector2D(-direction.Y, direction.X) : new Vector2D(direction.Y, -direction.X);
var screenDis = 36d;
var unitDis = canvasProxy.ToUnit(screenDis);
var measureLineDis = vDir * unitDis;
MeasureLineP = new Line2D(line2D.Start + vDir * unitDis, line2D.End + vDir * unitDis);
canvas.DrawLine(MeasurePenP, MeasureLineP);
var verticalLineTimes = 1.2;
MeasureLineV0 = new Line2D(
line2D.Start,
line2D.Start + vDir * unitDis * verticalLineTimes
);
MeasureLineV1 = new Line2D(
line2D.End,
line2D.End + vDir * unitDis * verticalLineTimes
);
canvas.DrawLine(MeasurePenV, MeasureLineV0);
canvas.DrawLine(MeasurePenV, MeasureLineV1);
if (IsSelected)
{
LineDrawExtensions.DrawSelectedLineState(MeasureLineP, canvas, canvasProxy, SelectionPen);
LineDrawExtensions.DrawSelectedLineState(MeasureLineV0, canvas, canvasProxy, SelectionPen);
LineDrawExtensions.DrawSelectedLineState(MeasureLineV1, canvas, canvasProxy, SelectionPen);
}
//line2D = outlineParaLine;
var middlePoint = MeasureLineP.MiddlePoint;
if (middlePoint == null)
{
return;
}
var text = $"{line2D.Length.ToString(LengthFormat)}";
double width = 0;
var chars = text.ToCharArray();
for (int i = 0; i < chars.Length; i++)
{
width += canvasProxy.GetCharScreenSize(chars[i]).Width;
}
width = -canvasProxy.ToUnit(width * Constants.TipFontSize_LengthMeasurement);
var height = canvasProxy.ToUnit(canvasProxy.GetCharScreenSize(chars[0]).Height *Constants.TipFontSize_LengthMeasurement * 1.15);
var a = direction.AngleWith(Vector2D.BasisX);
a = direction.X * direction.Y > 0 ? a : -a;
var vec = new Vector2D(width / 2 * Math.Cos(-a) + height * Math.Sin(-a), -width / 2 * Math.Sin(-a) + height * Math.Cos(-a));
middlePoint = middlePoint + vec;
canvas.DrawText(
$"{line2D.Length.ToString(LengthFormat)}",
Constants.TipFontSize_LengthMeasurement,
TextForeground_LengthMeasurement,
middlePoint, Math.PI / 2 - vDir.AngleFrom(Vector2D.BasisX)
);
}
