private void OnDragCompleted(object sender, DragCompletedEventArgs e)
{
if (Direction == Direction.Move && SizeColorBar.Current.Selected != Tool.Null)
{
switch (SizeColorBar.Current.Selected)
{
case Tool.Rectangle:
if (_Rectangle != null)
{
ResetLimit(Canvas.GetLeft(_Rectangle), Canvas.GetTop(_Rectangle), Canvas.GetLeft(_Rectangle) + _Rectangle.Width, Canvas.GetTop(_Rectangle) + _Rectangle.Height);
MainWindow.Register(_Rectangle);
_Rectangle = null;
}
break;
case Tool.Ellipse:
if (_Ellipse != null)
{
ResetLimit(Canvas.GetLeft(_Ellipse), Canvas.GetTop(_Ellipse), Canvas.GetLeft(_Ellipse) + _Ellipse.Width, Canvas.GetTop(_Ellipse) + _Ellipse.Height);
MainWindow.Register(_Ellipse);
_Ellipse = null;
}
break;
case Tool.Arrow:
if (_Arrow != null)
{
geometry.Clear();
ResetLimit(points.Min(p => p.X), points.Min(p => p.Y), points.Max(p => p.X), points.Max(p => p.Y));
points = null;
MainWindow.Register(_Arrow);
_Arrow = null;
}
break;
case Tool.Line:
if (_Line != null)
{
geometry.Clear();
ResetLimit(points.Min(p => p.X), points.Min(p => p.Y), points.Max(p => p.X), points.Max(p => p.Y));
points = null;
MainWindow.Register(_Line);
_Line = null;
}
break;
case Tool.Text:
break;
default:
break;
}
}
Direction = Direction.Null;
}
private void DrawDecorativeBorder(double W, double H, DrawingContext drawingContext)
{
_tempCornerRadius = CornerRadius.Coerce(W, H);
if (_streamGeometryCache == null)
{
_streamGeometryCache = new StreamGeometry();
}
else
{
_streamGeometryCache.Clear();
}
using (var ctx = _streamGeometryCache.Open())
{
ctx.BeginFigure(new Point(0, _tempCornerRadius.TopLeft), true, true);
DrawLeftBorderWithArc(ctx, H);
DrawBottomBorderWithArc(ctx, W, H);
DrawRightBorderWithArc(ctx, W, H);
DrawTopBorderWithArc(ctx, W);
}
drawingContext.DrawGeometry(Background, new Pen(BorderBrush, BorderThickness), _streamGeometryCache);
SetValue(ActualRenderWidthPropertyKey, _streamGeometryCache.Bounds.Width);
SetValue(ActualRenderHeightPropertyKey, _streamGeometryCache.Bounds.Height);
}
/// <summary>
/// 重绘整个曲线
/// </summary>
void RedrawWholeCurve()
{
gStream_Line.Clear();
/* 如果显示曲线的Panel尺寸为 0， 则不绘制曲线 */
if (szPanelView.Height == 0 || szPanelView.Width == 0)
{
return;
}
/* 如果两点间的间距为 0， 则不绘制曲线 */
if (dblPointsInterval == 0)
{
return;
}
/* 获取数据序列中的最大 Y 值 *
* 该值用来计算即将绘制的点在View上的 纵坐标 */
dblMaxPointValue = _points.MaxByY.Value;
using (StreamGeometryContext ctx = gStream_Line.Open())
{
using (StreamGeometryContext ctx_area = gStream_Area.Open())
{
ctx_area.BeginFigure(new Point(0, szPanelView.Height), true, true);
for (int i = 0; i < _points.Count; i++)
{
if (i == 0) // 如果是第一个点，则调用BegingFigure方法
{
ptNext.X = 0;
ptNext.Y = CalPointY(_points[i].Value, dblMaxPointValue, szPanelView.Height);
ctx.BeginFigure(ptNext, true, false);
}
else // 从第二个点开始，调用LintTo方法
{
ptNext.X += dblPointsInterval;
ptNext.Y = CalPointY(_points[i].Value, dblMaxPointValue, szPanelView.Height);
ctx.LineTo(ptNext, true, true);
}
ctx_area.LineTo(ptNext, true, true);
}
ctx_area.LineTo(new Point(ptNext.X, szPanelView.Height), true, true);
}
}
/* 通知父类曲线已经重绘 */
RaiseCurveUpdatedEvent();
}
/// <summary>
/// Does a one off calculation of the geometry to be rendered
/// </summary>
protected void CalculateGeometry()
{
if (recalcGeometry)
{
bool firstPass = true;
geometry.Clear();
using (StreamGeometryContext ctx = geometry.Open())
{
foreach (Point point in points)
{
if (!firstPass)
{
ctx.LineTo(point, !filled, true);
}
else
{
ctx.BeginFigure(point, filled, filled);
}
firstPass = false;
}
recalcGeometry = false;
}
}
}
