public SpiderChartPanel()
{
MouseDown += OnMouseDown;
MouseMove += OnMouseMove;
MouseUp += (sender, args) => nearestLine = null;
TouchDown += (sender, args) =>
{
if (!IsInteractive) return;
var device = args.Device as TouchDevice;
if (device == null) return;
device.Updated += DeviceOnUpdated;
};
TouchUp += (sender, args) =>
{
if (!IsInteractive) return;
var device = args.Device as TouchDevice;
if (device == null) return;
capturedLines.Remove(device.Id);
device.Updated -= DeviceOnUpdated;
};
}
private void OnMouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed || !IsInteractive) return;
var position = e.GetPosition(this);
var smallestDistance = double.MaxValue;
var nearestIndexOnLine = -1;
var scale = Maximum - Minimum;
double angle;
if (nearestLine == null)
foreach (var line in Lines.Where(k=>k.CanEdit))
{
for (var j = 0; j < line.PointDataSource.Count; j++)
{
angle = j*deltaAngle;
var curRadius = minRadius + (line.PointDataSource[j] - Minimum)*deltaRadius/scale;
var p2 = GetPoint(center, curRadius, angle);
var dist = Distance(p2, position);
if (dist > InteractivePointRadius || dist > smallestDistance) continue;
smallestDistance = dist;
nearestLine = line;
nearestIndexOnLine = j;
}
}
else
{
var line = nearestLine;
for (var j = 0; j < line.PointDataSource.Count; j++)
{
angle = j * deltaAngle;
var curRadius = minRadius + (line.PointDataSource[j] - Minimum) * deltaRadius / scale;
var p2 = GetPoint(center, curRadius, angle);
var dist = Distance(p2, position);
if (dist > InteractivePointRadius || dist > smallestDistance) continue;
smallestDistance = dist;
nearestIndexOnLine = j;
}
}
if (nearestIndexOnLine < 0 || nearestLine == null) return;
ComputeNewValue(position, nearestIndexOnLine);
}
//public event ValuesChangedEventHandler ValuesChanged;
//public void OnValuesChanged(string name, List<double> values)
//{
// var handler = ValuesChanged;
// if (handler != null) handler(this, new ValuesChangedEventArgs(name, values));
//}
private void DeviceOnUpdated(object sender, EventArgs e)
{
var device = sender as TouchDevice;
if (device == null) return;
var position = device.GetTouchPoint(this).Position;
var smallestDistance = double.MaxValue;
var nearestIndexOnLine = -1;
var scale = Maximum - Minimum;
double angle;
nearestLine = capturedLines.ContainsKey(device.Id)
? capturedLines[device.Id]
: null;
if (nearestLine == null)
foreach (var line in Lines)
{
for (var j = 0; j < line.PointDataSource.Count; j++)
{
angle = j * deltaAngle;
var curRadius = minRadius + (line.PointDataSource[j] - Minimum) * deltaRadius / scale;
var p2 = GetPoint(center, curRadius, angle);
var dist = Distance(p2, position);
if (dist > InteractivePointRadius || dist > smallestDistance) continue;
smallestDistance = dist;
nearestLine = capturedLines[device.Id] = line;
nearestIndexOnLine = j;
}
}
else
{
var line = nearestLine;
for (var j = 0; j < line.PointDataSource.Count; j++)
{
angle = j * deltaAngle;
var curRadius = minRadius + (line.PointDataSource[j] - Minimum) * deltaRadius / scale;
var p2 = GetPoint(center, curRadius, angle);
var dist = Distance(p2, position);
if (dist > InteractivePointRadius || dist > smallestDistance) continue;
smallestDistance = dist;
nearestIndexOnLine = j;
}
}
if (nearestIndexOnLine < 0 || nearestLine == null) return;
ComputeNewValue(position, nearestIndexOnLine);
}
