// Capture the mouse event and hit test the coordinate point value against
// the child visual objects.
void MyVisualHost_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
// Retreive the coordinates of the mouse button event.
if (selectedVisual != null)
selectedVisual.Opacity = 1.0;
selectedVisual = null;
}
private MyDrawingVisual CreateDrawingVisualROIs(KeyValuePair<string, Point> ptInfo)
{
MyDrawingVisual drawingVisual = new MyDrawingVisual();
drawingVisual.StartPos = ptInfo.Value;
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingVisual.Name = ptInfo.Key;
Point pos = ptInfo.Value;
int sz = 10;
Point ptUp = new Point(pos.X, pos.Y- sz);
Point ptRight = new Point(pos.X + sz, pos.Y);
Point ptDown = new Point(pos.X, pos.Y + sz);
Point ptLeft = new Point(pos.X - sz, pos.Y);
#region draw anchors for calibration
if (m_IsCalibrating)
{
string s = string.Format("M {0},{1} L {2},{3} {4},{5} {6},{7} {8},{9}",
ptUp.X, ptUp.Y, ptLeft.X, ptLeft.Y,
ptDown.X, ptDown.Y, ptRight.X, ptRight.Y, ptUp.X, ptUp.Y);
Brush anchorFill = Brushes.YellowGreen;
Brush anchorBorder = Brushes.Black;
anchorBorder = Brushes.Red;
anchorFill = Brushes.LightGreen;
int index = int.Parse(GetNumber(ptInfo.Key));
FormattedText text = new FormattedText(index.ToString(),
CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
new Typeface("SimSun"),
16,
Brushes.Black);
if (drawingVisual.Name.IndexOf(stringResUtility.ROITopLeft) != -1)
drawingContext.DrawText(text, new Point(pos.X + 10, pos.Y));
Geometry geometry = Geometry.Parse(s);
drawingContext.DrawGeometry(anchorFill, new Pen(anchorBorder, 2), geometry);
}
#endregion
drawingContext.Close();
return drawingVisual;
}
internal void onMouseUp()
{
if (selectedVisual != null)
selectedVisual.Opacity = 1.0;
selectedVisual = null;
ReleaseMouseCapture();
}
private MyDrawingVisual CreateDrawingVisualMarker(KeyValuePair<string, Point> ptInfo, bool bHigh)
{
MyDrawingVisual drawingVisual = new MyDrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingVisual.StartPos = ptInfo.Value;
drawingVisual.Name = ptInfo.Key;
Point pos = ptInfo.Value;
Point ptUp = new Point(pos.X - 10, pos.Y - 10);
Point ptDown = new Point(pos.X - 10, pos.Y + 10);
Point ptRight = new Point(pos.X + 10, pos.Y);
string s = string.Format("M {0},{1} {2},{3} {4},{5} {0},{1}", ptUp.X, ptUp.Y, ptDown.X, ptDown.Y, ptRight.X, ptRight.Y);
Geometry geometry = Geometry.Parse(s);
Brush brush = bHigh ? Brushes.Red : Brushes.SeaGreen;
drawingContext.DrawGeometry(brush, new Pen(Brushes.Yellow, 1), geometry);
drawingContext.Close();
return drawingVisual;
}
// If a child visual object is hit, toggle its opacity to visually indicate a hit.
public HitTestResultBehavior myCallback(HitTestResult result)
{
selectedVisual = null;
if (result.VisualHit.GetType() == typeof(MyDrawingVisual))
{
MyDrawingVisual hitViusal = (MyDrawingVisual)(result.VisualHit);
((DrawingVisual)result.VisualHit).Opacity = 0.2;
selectedVisual = (MyDrawingVisual)result.VisualHit;
}
// Stop the hit test enumeration of objects in the visual tree.
return HitTestResultBehavior.Stop;
}
