/// <summary>
/// Sets up the polyline and points on the graph
/// </summary>
/// <param name="graph">The Graph</param>
/// <param name="newPoints">The list of points of the polyline on the graph</param>
private static void SetUpGraph(PolylineGraph graph, ICollection <Point> newPoints)
{
//Adding the Polyline
Polyline polyline = new Polyline
{
Points = new PointCollection(newPoints),
Stroke = graph.PolylineColor,
StrokeThickness = 1
};
Canvas.SetLeft(polyline, graph.AxisThickness - graph.min_x + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0));
Canvas.SetTop(polyline, graph.AxisThickness - graph.min_y + +((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0));
graph.Graph.Children.Add(polyline);
//Adding the points with tooltip
if (graph.ShowPoints)
{
foreach (Point p in newPoints)
{
Ellipse e = new Ellipse
{
Width = graph.PointSize,
Height = graph.PointSize,
Fill = graph.PolylineColor,
ToolTip = PointToolTip((p.Y / graph.YScaleFactor).ToString())
};
Canvas.SetLeft(e, graph.AxisThickness + p.X - graph.min_x - graph.PointSize / 2 + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0));
Canvas.SetTop(e, graph.AxisThickness + p.Y - graph.min_y - graph.PointSize / 2 + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0));
graph.Graph.Children.Add(e);
}
}
}
/// <summary>
/// Redraws the view when the Points collection changes
/// </summary>
private static void OnItemsSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
PolylineGraph graph = (PolylineGraph)d;
if (e.NewValue == null)
{
return;
}
graph.Graph.Children.Clear();
graph.Axis.Children.Clear();
graph.max_x = Double.MinValue;
graph.max_y = Double.MinValue;
graph.min_x = Double.MaxValue;
graph.min_y = Double.MaxValue;
ICollection <Point> scaledPoints = new Collection <Point>();
foreach (Point p in (ICollection <Point>)e.NewValue)
{
scaledPoints.Add(new Point(p.X * graph.XScaleFactor, p.Y * graph.YScaleFactor));
}
foreach (Point p in scaledPoints)
{
if (p.X > graph.max_x)
{
graph.max_x = p.X;
}
if (p.Y > graph.max_y)
{
graph.max_y = p.Y;
}
if (p.X < graph.min_x)
{
graph.min_x = p.X;
}
if (p.Y < graph.min_y)
{
graph.min_y = p.Y;
}
}
Double height = (graph.max_y - graph.min_y);
Double width = (graph.max_x - graph.min_x);
graph.Graph.Width = width + graph.AxisThickness + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght;
graph.Graph.Height = height + graph.AxisThickness + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght;
SetUpYAxis(graph, scaledPoints);
SetUpXAxis(graph, scaledPoints);
SetUpGraph(graph, scaledPoints);
}
/// <summary>
/// Sets up the Y axis
/// </summary>
/// <param name="graph">The Graph</param>
/// <param name="newPoints">The list of points on the graph</param>
private static void SetUpYAxis(PolylineGraph graph, ICollection <Point> newPoints)
{
//Adding the vertical axis line
Polyline verticalLine = new Polyline();
double lineH = graph.max_y - graph.min_y + graph.AxisThickness + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0);
verticalLine.Points.Add(new Point(graph.AxisThickness, graph.AxisThickness / 2));
verticalLine.Points.Add(new Point(graph.AxisThickness, lineH + graph.AxisOutlineLenght));
verticalLine.Stroke = graph.AxisColor;
verticalLine.StrokeThickness = 0.5;
graph.Axis.Children.Add(verticalLine);
//Adding the labels and the unit lines
if (graph.VerticalSteps > 0)
{
//Calculatin the steps height
Double offset = 0;
int n_division = 0;
if (graph.VerticalSteps <= 0)
{
graph.VerticalSteps = 1;
}
graph.stepHeight = (graph.max_y - graph.min_y);
while (graph.stepHeight > 10)
{
n_division++;
graph.stepHeight = graph.stepHeight / 10;
}
if ((graph.stepHeight - Math.Round(graph.stepHeight)) < 0.5)
{
graph.stepHeight += 0.5;
}
graph.stepHeight = Math.Round(graph.stepHeight, MidpointRounding.AwayFromZero);
for (int i = 0; i < n_division; i++)
{
graph.stepHeight = graph.stepHeight * 10;
}
graph.stepHeight = graph.stepHeight / (graph.VerticalSteps - 1);
//Adding the lines
for (int i = 0; i < graph.VerticalSteps; i++)
{
if (graph.AttachGraphToAxis && offset == 0)
{
i--;
offset += graph.stepHeight;
continue;
}
Polyline line = new Polyline();
line.Points.Add(new Point(graph.AxisThickness / 2, graph.AxisThickness + offset + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0)));
line.Points.Add(new Point(graph.AxisThickness, graph.AxisThickness + offset + ((!graph.AttachGraphToAxis)?graph.GraphContentPadding:0)));
line.Stroke = graph.AxisColor;
line.StrokeThickness = 0.5;
graph.Axis.Children.Add(line);
//Adding the labels
if (graph.ShowAxisLabels)
{
TextBlock label = new TextBlock();
label.Text = Math.Round(((offset + graph.min_y) / graph.YScaleFactor)).ToString();
label.FontSize = 8;
label.Foreground = graph.LabelsColor;
Canvas.SetBottom(label, graph.AxisThickness + offset + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) - label.FontSize / 2);
Canvas.SetLeft(label, -((label.Text.Length * label.FontSize) / 2));
graph.Labels.Children.Add(label);
}
offset += graph.stepHeight;
//Avoiding lines over the vertical axis arrow
if (graph.AxisThickness + offset + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) > lineH)
{
break;
}
}
}
//Adding the Y axis name label
if (graph.ShowAxisLabels)
{
Double YPosition = graph.AxisThickness + (graph.max_y - graph.min_y) + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght + 5;
Double XPosition = -graph.AxisThickness;
Decorator label = Label(graph.YAxisName, XPosition, YPosition, graph.LabelsColor, 10);
label.Width = 50;
label.Height = 15;
graph.Labels.Children.Add(label);
graph.Graph.Height += label.Height + 8;
}
//Adding the arrow on top of the axis line
Polyline arrow = VerticalArrow(new Point(graph.AxisThickness, graph.max_y - graph.min_y + graph.AxisThickness + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght), graph.AxisThickness / 2);
arrow.Stroke = graph.AxisColor;
arrow.StrokeThickness = 1;
graph.Axis.Children.Add(arrow);
}
/// <summary>
/// Sets up the X axis
/// </summary>
/// <param name="graph">The Graph</param>
/// <param name="newPoints">The list of Points on the graph</param>
private static void SetUpXAxis(PolylineGraph graph, ICollection <Point> newPoints)
{
//Adding the horizontal axis line
Polyline horizontalLine = new Polyline();
horizontalLine.Points.Add(new Point(graph.AxisThickness / 2, graph.AxisThickness));
horizontalLine.Points.Add(new Point(graph.max_x + graph.AxisThickness - graph.min_x + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght, graph.AxisThickness));
horizontalLine.Stroke = graph.AxisColor;
horizontalLine.StrokeThickness = 0.5;
graph.Axis.Children.Add(horizontalLine);
//Setting the horizontal offset for the axis units and lines
Double offset = graph.AxisThickness;
if (graph.AttachGraphToAxis is false)
{
offset += graph.GraphContentPadding;
}
//Adding the axis unit lines and labels
foreach (Point p in newPoints)
{
if (graph.AttachGraphToAxis && p.X == 0)
{
continue;
}
//Adding the lines
Polyline line = new Polyline();
line.Points.Add(new Point(offset + p.X - graph.min_x, graph.AxisThickness / 2));
line.Points.Add(new Point(offset + p.X - graph.min_x, graph.AxisThickness));
line.Stroke = graph.AxisColor;
line.StrokeThickness = 0.5;
graph.Axis.Children.Add(line);
//Adding the labels
if (graph.ShowAxisLabels)
{
TextBlock label = new TextBlock
{
Text = ((p.X) / graph.XScaleFactor).ToString(),
FontSize = 8,
Foreground = graph.LabelsColor
};
Canvas.SetBottom(label, -label.FontSize);
Canvas.SetLeft(label, offset + p.X - graph.min_x - ((label.Text.Length * label.FontSize) / 4));
graph.Labels.Children.Add(label);
}
}
//Adding the X axis name label
if (graph.ShowAxisLabels)
{
Double XPosition = graph.AxisThickness + (graph.max_x - graph.min_x) + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght + 5;
Double YPosition = graph.AxisThickness / 2;
Decorator label = Label(graph.XAxisName, XPosition, YPosition, graph.LabelsColor, 10);
label.Width = 50;
label.Height = 15;
graph.Labels.Children.Add(label);
graph.Graph.Width += label.Width + 8;
}
//Adding the arrow to the end of the axis line
Polyline arrow = HorizontalArrow(new Point(graph.max_x - graph.min_x + graph.AxisThickness + ((!graph.AttachGraphToAxis) ? graph.GraphContentPadding : 0) + graph.AxisOutlineLenght, graph.AxisThickness), graph.AxisThickness / 2);
arrow.Stroke = graph.AxisColor;
arrow.StrokeThickness = 1;
graph.Axis.Children.Add(arrow);
}
