/// <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
Line.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 the line is complete then...
if (PointCollection.Count == 2)
{
// Calculate the center of the line
UpdateCenterPoint();
// Color the first point green
PointCollection[0].DeselectedColor = Colors.Lime;
PointCollection[0].Color = PointCollection[0].DeselectedColor;
// Make the line visible
Visibility = true;
}
}
/// <summary>
/// Toggles the start point of a wipe line.
/// </summary>
public void ToggleStartPoint()
{
// Create temporary references to the view model points
PolygonPointViewModel tempStart = StartPoint;
PolygonPointViewModel tempEnd = EndPoint;
// Create temporary references to the model points
PolygonPoint startPoint = Line.Points[0];
PolygonPoint endPoint = Line.Points[1];
// Swap the colors on the points
tempStart.DeselectedColor = Colors.DodgerBlue;
tempEnd.DeselectedColor = Colors.Lime;
// Swap the points on the view model
PointCollection.Clear();
StartPoint = tempEnd;
EndPoint = tempStart;
PointCollection.Add(StartPoint);
PointCollection.Add(EndPoint);
// Swap the points on the model
Line.Points.Clear();
Line.Points.Add(endPoint);
Line.Points.Add(startPoint);
// Fire the collection changed event
NotifyPointCollectionChanged();
}
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
Ellipse.Points.Add(modelPoint);
// Create the new view model point
PolygonPointViewModel viewModelPoint = new PolygonPointViewModel(modelPoint, null);
// 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 this is complete polygon then...
if (Ellipse.Points.Count >= 3)
{
// Calculate the center of the polygon
UpdateCenterPoint();
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="ellipseModel">Ellipse model</param>
/// <param name="labelVisible">Determines if the label is visible</param>
public EllipseViewModel(Ellipse ellipseModel, bool labelVisible) :
base(labelVisible)
{
// Store off the model
Ellipse = ellipseModel;
// Default the ellipse to visible
Visibility = true;
// Create the center point of the ellipse
CenterPoint = new PolygonPointViewModel(ellipseModel.Center, null);
// Loop over all the points in the ellipse model
foreach (PolygonPoint pt in ellipseModel.Points)
{
// Add a view model point for each model point
PointCollection.Add(new PolygonPointViewModel(pt, null));
}
// If the ellipse has points then...
if (ellipseModel.Points.Count > 0)
{
// Initialize the start side for when the ellipse is in wipe mode
InitializeGreenLine();
}
// Update the position of the center point
UpdateCenterPoint();
// Fire the property changed event so the converters run
NotifyPointCollectionChanged();
}
/// <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>
/// Selects the specified point.
/// </summary>
/// <param name="point">Point to select</param>
public void SelectPoint(PolygonPointViewModel point)
{
// Mark the point as selected
point.Selected = true;
// Store off the selected point
SelectedVertex = point;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="point1">First point of the line segment</param>
/// <param name="point2">Second point of the line segment</param>
public LineSegmentViewModel(PolygonPointViewModel point1, PolygonPointViewModel point2)
{
// Store off the line segment points
Point1 = point1;
Point2 = point2;
// Set the line segment color to blue
Color = Colors.DodgerBlue;
}
/// <summary>
/// Calculates the center of the line.
/// </summary>
/// <returns>Center of the ;ome.</returns>
private PolygonPointViewModel GetCenterOfLine()
{
// Create a new polygon point view model object; not giving it a model object
PolygonPointViewModel centerPoint = new PolygonPointViewModel(null, null);
// Calculate the center of the line
centerPoint.X = (PointCollection[0].X + PointCollection[1].X) / 2.0;
centerPoint.Y = (PointCollection[0].Y + PointCollection[1].Y) / 2.0;
// Return the center of the line
return(centerPoint);
}
/// <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>
/// Intialize the snapshot time bar pointer at the specified position.
/// </summary>
/// <param name="position">Initial position of the time bar pointer</param>
public void Initialize(int position)
{
// Store off the position
Time = position;
const int HeightOfPointer = 25;
const int HeightOfRectangle = 20;
//
// Initialize the time bar points
//
// Bottom Left Corner
PolygonPointViewModel p1 = new PolygonPointViewModel(new PolygonPoint(), null);
p1.X = Time - HalfWidth;
p1.Y = HeightOfRectangle;
// Center Pointer
PolygonPointViewModel p2 = new PolygonPointViewModel(new PolygonPoint(), null);
p2.X = Time;
p2.Y = HeightOfPointer;
// Bottom Right Corner
PolygonPointViewModel p3 = new PolygonPointViewModel(new PolygonPoint(), null);
p3.X = Time + HalfWidth;
p3.Y = HeightOfRectangle;
// Top Right Corner
PolygonPointViewModel p4 = new PolygonPointViewModel(new PolygonPoint(), null);
p4.X = Time + HalfWidth;
p4.Y = 0;
// Top Left Corner
PolygonPointViewModel p5 = new PolygonPointViewModel(new PolygonPoint(), null);
p5.X = Time - HalfWidth;
p5.Y = 0;
// Add the points to the point collection
PointCollection.Add(p1);
PointCollection.Add(p2);
PointCollection.Add(p3);
PointCollection.Add(p4);
PointCollection.Add(p5);
PointCollection.Add(p1);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="polygon">Model polygon</param>
/// <param name="labelVisible">Whether the label is visible</param>
public PolygonViewModel(Polygon polygon, bool labelVisible) :
base(labelVisible)
{
// Store off the model
Polygon = polygon;
// The WPF polygon is not shown until the polygon is closed
Visibility = false;
// By default the polygon starts with no points, so we are in point mode
PolygonClosed = false;
// Create the center point but set the parent to null so that it doesn't
// fire property change events on both the X and Y coordinates.
// One event is done for the pair when the point is updated.
CenterPoint = new PolygonPointViewModel(new PolygonPoint(), null);
// Loop over all the points in the polygon model
foreach (PolygonPoint pt in Polygon.Points)
{
// Add a view model point for each model point
PointCollection.Add(new PolygonPointViewModel(pt, this));
}
// If this is complete polygon then...
if (Polygon.Points.Count >= 3)
{
// Calculate the center of the polygon
UpdateCenterPoint();
// Add the line segment to the collection
Segments.Add(new LineSegmentViewModel(PointCollection[0], PointCollection[1]));
// Make the WPF polygon visible
ClosePolygon();
// Display the green line if the fill type is a wipe
SegmentsVisible = (Polygon.FillType == PolygonFillType.Wipe);
}
// Register for the collection changed event
PointCollection.CollectionChanged += PointCollection_CollectionChanged;
// Create a collection of line segments
LineSegments = new List <PolygonLineSegment>();
// Mark the polygon as dirty, this causes the line segments to get refreshed
Dirty = true;
}
/// <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>
/// Inserts a polygon point at the specified position and at the specified index in the point collection.
/// </summary>
/// <param name="position">Position of the point</param>
/// <param name="insertPosition">Index into the point collection</param>
public void InsertPoint(Point position, int insertPosition)
{
// Create a new polygon point model object
PolygonPoint modelPoint = new PolygonPoint();
// Create a new view model polygon point object
PolygonPointViewModel viewModelPoint = new PolygonPointViewModel(modelPoint, this);
// Insert the model point into the model point collection
Polygon.Points.Insert(insertPosition, modelPoint);
// Insert the view model point into the point collection
PointCollection.Insert(insertPosition, viewModelPoint);
// Initialize the position of the point
viewModelPoint.X = position.X;
viewModelPoint.Y = position.Y;
}
/// <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();
}
