public void HookChange(Hook hook)
{
foreach (Hook hookToNotify in Hooks)
{
if (hookToNotify != hook)
{
hookToNotify.IsVisible = false;
}
}
PointCollection temPoints = new PointCollection(Points);
int startIndex = temPoints.IndexOf(hook.OriginalStartPoint);
int endIndex = temPoints.IndexOf(hook.OriginalEndPoint);
if (startIndex != -1 && endIndex != -1)
{
for (int i = startIndex; i <= endIndex; i++)
{
Point toChangePoint = temPoints[i];
switch (hook.Orientation)
{
case Orientation.Horizontal:
temPoints[i] = new Point(hook.HookPoint.X, toChangePoint.Y);
break;
case Orientation.Vertical:
temPoints[i] = new Point(toChangePoint.X, hook.HookPoint.Y);
break;
}
}
hook.SetNewPoints();
}
Points = temPoints;
ArrowPoint = Points[Points.Count - 1];
}
/// <summary>
/// Handles the Double click event extension on Graphic and deletes the vertex.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="System.Windows.Input.MouseButtonEventArgs"/> instance containing the event data.</param>
private void vertex_doubleClick(object sender, MouseButtonEventArgs e)
{
Graphic g = sender as Graphic;
Graphic parent = g.Attributes["Feature"] as Graphic;
if (parent.Geometry is Envelope)
{
return; //Cannot delete
}
PointCollection p = g.Attributes["PointCollection"] as PointCollection;
if (parent.Geometry is Polygon && p.Count < 5)
{
return; //Cannot delete
}
if (parent.Geometry is Polyline && p.Count < 3)
{
return; //Cannot delete
}
int index = p.IndexOf(g.Geometry as MapPoint);
if (parent.Geometry is Polygon && index == 0) //Maintain closing point
{
p.RemoveAt(p.Count - 1); //remove last point
p.Add(new MapPoint(p[1].X, p[1].Y)); //close poly
}
MapPoint removeItem = p[index];
p.RemoveAt(index);
//Restart edit to rebuild vertices and hover lines
StopEdit(true);
StartEdit(parent, true);
OnGeometryEdit(g, null, removeItem, Action.VertexRemoved);
}
public Point GetMousePositionCanvas()
{
Point point = Mouse.GetPosition(Canvas);
Text(point.X, point.Y, "(" + (point.X - 125) + ":" + (point.Y - 125) + ")", Colors.Blue);
bool added = false;
if (point.X > 0 && point.Y > 0)
{
PointCollection.Add(point);
added = true;
}
if (buttonsDisplay.Children.Count < 10 && added)
{
Button b = new Button();
b.Click += new RoutedEventHandler(this.ButtonClick);
b.Content = "Mudar";
b.Name = "Button" + PointCollection.IndexOf(point).ToString();
buttonsDisplay.Children.Add(b);
TextBox tx = new TextBox();
tx.Name = "X" + PointCollection.IndexOf(point).ToString();
tx.Text = (point.X - 125).ToString();
tx.MaxLength = 4;
tx.MaxLines = 1;
xDisplay.Children.Add(tx);
TextBox ty = new TextBox();
ty.Name = "Y" + PointCollection.IndexOf(point).ToString();
ty.Text = (point.Y - 125).ToString();
ty.MaxLength = 4;
ty.MaxLines = 1;
yDisplay.Children.Add(ty);
}
return(new Point(point.X, point.Y));
}
// 对输入的两点及其上点集执行递归算法，找到最远点，根据围成的三角形分类点，生成两条边，对每条边极其上方的点集再次执行本递归算法
private int FindSubHull(PointCollection points, Point pointLeft, Point pointRight)
{
if (points.Count == 0)
{
return(1);
}
int totalCommandCount = 0;
Point pointFarthest = FindFarthestPoint(points, pointLeft, pointRight, out int commandCount);
totalCommandCount += commandCount;
ChangeToVertex(pointFarthest, pointsVertex.IndexOf(pointLeft) + 1);
totalCommandCount += 3;
historyLines.Add(GetLines(pointsVertex, out commandCount));
totalCommandCount += commandCount;
points.Remove(pointFarthest);
totalCommandCount++;
PointCollection points1 = new PointCollection();
PointCollection points2 = new PointCollection();
foreach (Point point in points)
{
int deter1 = CalDeter(pointLeft, pointFarthest, point);
int deter2 = CalDeter(pointFarthest, pointRight, point);
totalCommandCount += 2;
if (deter1 > 0)
{
points1.Add(point);
totalCommandCount++;
}
else if (deter2 > 0)
{
points2.Add(point);
totalCommandCount++;
}
else // 三角形内
{
ChangeToInternal(point);
totalCommandCount += 2;;
}
}
totalCommandCount += FindSubHull(points1, pointLeft, pointFarthest);
totalCommandCount += FindSubHull(points2, pointFarthest, pointRight);
return(totalCommandCount);
}
/// <summary>
/// Get the previous point to the selected point on the polygon.
/// </summary>
/// <remarks>This method is used to help draw a ghost point</remarks>
/// <returns>Next polygon point</returns>
public PolygonPointViewModel GetPreviousPoint()
{
// Get the index of the selected point
int selectedPointIndex = PointCollection.IndexOf(SelectedVertex);
// Attempt to move to the previous point
int prevPoint = selectedPointIndex - 1;
// If we passed the first point then...
if (prevPoint < 0)
{
// Wrap around to the last point
prevPoint = PointCollection.Count - 1;
}
// Return the previous point
return(PointCollection[prevPoint]);
}
/// <summary>
/// Get the next point on the polygon following the selected point.
/// </summary>
/// <remarks>This method is used to help draw a ghost point</remarks>
/// <returns>Next polygon point</returns>
public PolygonPointViewModel GetNextPoint()
{
// Get the index of the selected point
int selectedPointIndex = PointCollection.IndexOf(SelectedVertex);
// Attempt to advance to the next point
int nextPoint = selectedPointIndex + 1;
// If we have passed the last point then...
if (nextPoint > PointCollection.Count - 1)
{
// Wrap around to the first point
nextPoint = 0;
}
// Return the next point
return(PointCollection[nextPoint]);
}
protected override void OnRender(DrawingContext drawingContext)
{
// Drawing the arrow
StreamGeometry streamGeometry = new StreamGeometry();
using (StreamGeometryContext geometryContext = streamGeometry.Open())
{
if (_points != null && _points.Any())
{
geometryContext.BeginFigure(_points[0], true, true);
geometryContext.PolyLineTo(_points.Where(p => _points.IndexOf(p) > 0).ToList(), true, true);
}
}
// Draw the polygon visual
drawingContext.DrawGeometry(Brushes.DarkOrchid, new Pen(_btn.Background, 0.5), streamGeometry);
base.OnRender(drawingContext);
}
private void vertexLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs args)
{
Graphic graphic = args.Graphic;
if (graphic.Geometry is MapPoint) //Moving point
{
DraggingVertex = graphic;
args.Handled = true; //Prevent map from reacting to mouse event
DraggingVertex.Select();
StartTracking();
fromPoint = new MapPoint((graphic.Geometry as MapPoint).X, (graphic.Geometry as MapPoint).Y);
}
else if (graphic.Geometry is Polyline) //Adding vertex
{
Polyline line = graphic.Geometry as Polyline;
Point pScreen = args.GetPosition(MyMap);
MapPoint pMap = MyMap.ScreenToMap(pScreen);
MapPoint snap = FindPointOnLineClosestToPoint(line.Paths[0][0], line.Paths[0][1], pMap);
args.Handled = true;
PointCollection pnts = graphic.Attributes["PointCollection"] as PointCollection;
Graphic parent = graphic.Attributes["Feature"] as Graphic;
//Add new vertex and immediately start tracking it
if (snapVertex != null)
{
vertexLayer.Graphics.Remove(snapVertex);
}
DraggingVertex = AddVertexToEditLayer(parent, vertexLayer, snap);
DraggingVertex.Select();
args.Handled = true; //Prevent map from reacting to mouse event
StartTracking();
DraggingVertex.Attributes.Add("PointCollection", pnts);
int index = pnts.IndexOf(line.Paths[0][0]);
pnts.Insert(index + 1, snap);
vertexLayer.Graphics.Remove(graphic);
AddHoverLineSegment(pnts, line.Paths[0][0], snap, parent);
AddHoverLineSegment(pnts, snap, line.Paths[0][1], parent);
OnGeometryEdit(graphic, snap, null, Action.VertexAdded);
fromPoint = new MapPoint(snap.X, snap.Y);
}
}
private void canvas_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Point newPoint = new Point()
{
X = (int)e.GetPosition(canvas).X, Y = (int)e.GetPosition(canvas).Y
};
bool alreadyInserted = false;
foreach (Point p in _pointCollection)
{
if (p.X > newPoint.X)
{
_pointCollection.Insert(_pointCollection.IndexOf(p), newPoint);
alreadyInserted = true;
break;
}
}
if (!alreadyInserted)
{
_pointCollection.Add(newPoint);
}
}
private void PointCollectionOperations(object sender, SelectionChangedEventArgs e)
{
RadioButton li = (sender as RadioButton);
// Strings used to display the results
String syntaxString, resultType, operationString;
// The local variables point1, point2, vector2, etc are defined in each
// case block for readability reasons. Each variable is contained within
// the scope of each case statement.
switch (li.Name)
{ //begin switch
case "rb1":
{
//<SnippetPointCollectionAdd>
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
Point point4 = new Point(40, 40);
// Instantiating an array of Points to the points
Point[] pointArray = new Point[3];
// Adding points to array
pointArray[0] = point1;
pointArray[1] = point2;
pointArray[2] = point3;
// Instantiating a PointCollection and initializing with an array
PointCollection pointCollection1 = new PointCollection(pointArray);
// Adding a point to the PointCollection
pointCollection1.Add(point4);
// pointCollection1 is equal to (10,10 20,20 30,30 40,40)
//</SnippetPointCollectionAdd>
break;
}
case "rb2":
{
//<SnippetPointCollectionClear>
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to the PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// clearing the PointCollection
pointCollection1.Clear();
// pointCollection1 is now empty
//</SnippetPointCollectionClear>
break;
}
case "rb3":
{
//<SnippetPointCollectionContains>
Boolean inCollection;
// Instantiating and Initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
Point point4 = new Point(40, 40);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
inCollection = pointCollection1.Contains(point4);
// inCollection is equal to False
//</SnippetPointCollectionContains>
break;
}
case "rb4":
{
//<SnippetPointCollectionIndexOf>
int pIndex;
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// Getting the index of a Point
pIndex = pointCollection1.IndexOf(point2);
// pointIndex is equal to 1
//</SnippetPointCollectionIndexOf>
break;
}
case "rb5":
{
//<SnippetPointCollectionInsert>
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
Point point4 = new Point(40, 40);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to the PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// Inserting a Point into the PointCollection
pointCollection1.Insert(1, point4);
// pointCollection1 is now equal to (10,10 40,40 20,20 30,30
//</SnippetPointCollectionInsert>
break;
}
case "rb6":
{
//<SnippetPointCollectionRemove>
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// Removing a Point from the PointCollection
pointCollection1.Remove(point2);
// pointCollection1 is equal to 10,10 30,30
//</SnippetPointCollectionRemove>
break;
}
case "rb7":
{
//<SnippetPointCollectionRemoveAt>
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to the PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// Removing a range of Points
pointCollection1.RemoveAt(1);
// pointCollection1 is equal to (10,10 30,30)
//</SnippetPointCollectionRemoveAt>
break;
}
case "rb8":
{
//<SnippetPointCollectionToString>
string pcString;
// Instantiating and initializing Point structures
Point point1 = new Point(10, 10);
Point point2 = new Point(20, 20);
Point point3 = new Point(30, 30);
// Instantiating a PointCollection
PointCollection pointCollection1 = new PointCollection();
// Adding Points to PointCollection
pointCollection1.Add(point1);
pointCollection1.Add(point2);
pointCollection1.Add(point3);
// pointCollection1 is equal to (10,10 20,20 30,30)
// Getting a string representation of the PointCollection
pcString = pointCollection1.ToString();
// pcString is equal to "10,10 20,20 30,30"
//</SnippetPointCollectionToString>
break;
}
case "rb9":
{
break;
}
case "rb10":
{
break;
}
case "rb11":
{
break;
}
case "rb12":
{
break;
}
} //end switch
}
private void VisualiseData()
{
if (GraphData == null)
{
return;
}
//Data deets
int xPartitions = GraphData.Count;
if (xPartitions == 0)
{
return;
}
double valueMax = GraphData.Max(x => x.Value);
//Y plot points
int yMax = valueMax == 0 ? 10 : (int)(Math.Ceiling(valueMax / 10) * 10);
double yValueInteravals = yMax / 10;
//Label Y - Axis
for (int i = 0; i <= 10; i++)
{
TextBlock yLabel = new TextBlock {
Text = $"{i * yValueInteravals}", Background = Brushes.Transparent, TextAlignment = TextAlignment.Justify, FontSize = GraphDataLabelFontSize
};
var aw = yLabel.ActualWidth;
var ah = yLabel.ActualHeight;
yLabel.Margin = new Thickness(GraphMargin - 25 - aw, (zero.Y - endY.Y) - (i * ((zero.Y - endY.Y) / 10)) + (2 * GraphMargin / 3), 0, 0);
dataDependentLabels.Children.Add(yLabel);
}
//Label X-Axis
GeometryGroup xaxis_geom = new GeometryGroup();
var xStep = (endX.X - zero.X) / GraphData.Count;
for (int j = 0; j < GraphData.Count; j++)
{
//Create Axis data mark
xaxis_geom.Children.Add(new LineGeometry(new Point(GraphMargin + ((j + 1) * xStep), zero.Y), new Point(GraphMargin + ((j + 1) * xStep), zero.Y + 5)));
//Create and position label
TextBlock xLabel = new TextBlock {
Text = GraphData[j].Key.ToString(), Background = Brushes.Transparent, FontSize = GraphDataLabelFontSize
};
xLabel.Margin = new Thickness((j + 1) * xStep + (2 * GraphMargin / 3), zero.Y, 0, 0);
dataDependentLabels.Children.Add(xLabel);
}
Path yaxis_path = new Path();
yaxis_path.StrokeThickness = 1;
yaxis_path.Stroke = Brushes.Black;
yaxis_path.Data = xaxis_geom;
dataDependentLabels.Children.Add(yaxis_path);
//Get data Coordinates
PointCollection points = new PointCollection();
for (int p = 0; p < GraphData.Count; p++)
{
points.Add(new Point(GraphMargin + (xStep * (p + 1)), zero.Y - ((GraphData[p].Value / yMax) * (zero.Y - endY.Y))));
}
//Draw on points
foreach (Point p in points)
{
Ellipse dot = new Ellipse()
{
Fill = DataPointColour, Width = 6, Height = 6
};
Canvas.SetTop(dot, p.Y - (dot.Height / 2));
Canvas.SetLeft(dot, p.X - (dot.Width / 2));
ToolTip pointToolTip = new ToolTip();
pointToolTip.Content = GraphData[points.IndexOf(p)].Value;
dot.ToolTip = pointToolTip;
dataDependentLabels.Children.Add(dot);
}
//Draw line
Polyline dataLine = new Polyline();
dataLine.StrokeThickness = 1;
dataLine.Stroke = DataLineColour;
dataLine.Points = points;
dataDependentLabels.Children.Add(dataLine);
}