/// <summary>
/// Toggles the start side of a polygon.
/// </summary>
public void ToggleStartSide()
{
// Get first view model point
PolygonPointViewModel point1 = PointCollection[0];
// Remove the first view model point
PointCollection.Remove(point1);
// Add the point to the end of the point collection
PointCollection.Add(point1);
// Get the first model point
PolygonPoint pt1 = Polygon.Points[0];
// Remove the first model point
Polygon.Points.Remove(pt1);
// Add the point to the end of the point collection
Polygon.Points.Add(pt1);
// Update the green line segment
Segments[0] = new LineSegmentViewModel(PointCollection[0], PointCollection[1]);
Segments[0].Color = Colors.Lime;
// Tell the view to refresh
NotifyPointCollectionChanged();
}
/// <summary>
/// Deletes the specified polygon point.
/// </summary>
public void DeletePoint(PolygonPointViewModel pt)
{
// Remove the point from the polygon
PointCollection.Remove(pt);
Polygon.Points.Remove(pt.PolygonPoint);
// Update the green line segment
Segments[0] = new LineSegmentViewModel(PointCollection[0], PointCollection[1]);
Segments[0].Color = Colors.Lime;
// Raise the collection Property changed event so that the converters in the view run
NotifyPointCollectionChanged();
}
/// <summary>
/// Adds the specified point to the point collection.
/// </summary>
/// <param name="position">Position of the new point</param>
public override void AddPoint(Point position)
{
// Create the new model point
PolygonPoint modelPoint = new PolygonPoint();
// Add the model point to the model's point collection
Polygon.Points.Add(modelPoint);
// Create the new view model point
PolygonPointViewModel viewModelPoint = new PolygonPointViewModel(modelPoint, this);
// Initialize the position of the point
viewModelPoint.X = position.X;
viewModelPoint.Y = position.Y;
// Add the point to the view model point collection
PointCollection.Add(viewModelPoint);
// If there are at least two points on the polygon then...
if (PointCollection.Count > 1)
{
// Create a segment between the points
LineSegmentViewModel segment =
new LineSegmentViewModel(
viewModelPoint,
PointCollection[PointCollection.Count - 2]);
// Add the segment
Segments.Add(segment);
}
// If there are two or more points then...
if (PointCollection.Count >= 2)
{
// If the mouse is over the first polygon point then...
if (IsMouseOverFirstPolygonPoint(position))
{
// Remove the last point since we are going to connect up to the first point
PointCollection.Remove(PointCollection[PointCollection.Count - 1]);
Polygon.Points.Remove(Polygon.Points[Polygon.Points.Count - 1]);
// Make the WPF polygon visible
ClosePolygon();
}
}
}
/// <summary>
/// Toggles the start side of a polygon.
/// </summary>
public void ToggleStartSide()
{
// Get first view model point
PolygonPointViewModel point1 = PointCollection[0];
// Remove the first view model point
PointCollection.Remove(point1);
// Add the point to the end of the point collection
PointCollection.Add(point1);
// Get the first model point
PolygonPoint pt1 = Ellipse.Points[0];
// Remove the first model point
Ellipse.Points.Remove(pt1);
// Add the point to the end of the point collection
Ellipse.Points.Add(pt1);
// Increment the start side
Ellipse.StartSideRotation++;
// If we are past the last side then...
if (Ellipse.StartSideRotation > 3)
{
// Wrap around to the first side
Ellipse.StartSideRotation = 0;
}
// Update the green line segment
Segments[0] = new LineSegmentViewModel(PointCollection[0], PointCollection[1]);
Segments[0].Color = Colors.Lime;
// Force the view converters to run
NotifyPointCollectionChanged();
}
