private void PanStartCommand_Execute(MouseButtonEventArgs e)
{
if (!IsPlotArea((DependencyObject)e.OriginalSource, out EdgePanel edgePanel))
{
return;
}
if (e.ChangedButton == MouseButton.Left && e.ButtonState == MouseButtonState.Pressed)
{
panStartPoint = e.GetPosition(edgePanel);
if (YMaximum == null)
{
YMaximum = ActualYMaximum;
}
panStartX = XMinimum.ToBinary();
panStartY = YMinimum.Value;
panStartHeight = YMaximum.Value - YMinimum.Value;
panStartWidth = XMaximum.ToBinary() - XMinimum.ToBinary();
isPanning = true;
}
}
private void ZoomCommand_Execute(MouseWheelEventArgs e)
{
if (!IsPlotArea((DependencyObject)e.OriginalSource, out EdgePanel edgePanel))
{
return;
}
if (YMaximum == null)
{
YMaximum = ActualYMaximum;
}
var pos = e.GetPosition(edgePanel);
var ratio = new Point(pos.X / edgePanel.ActualWidth, 1 - pos.Y / edgePanel.ActualHeight);
int h = YMaximum.Value - YMinimum.Value;
long w = XMaximum.ToBinary() - XMinimum.ToBinary();
int centerY = YMinimum.Value + (int)(h * ratio.Y);
long centerX = XMinimum.ToBinary() + (long)(w * ratio.X);
if (Math.Sign(e.Delta) > 0)
{
XMinimum = ClipDate(DateTime.FromBinary(centerX - w / 4));
XMaximum = ClipDate(DateTime.FromBinary(centerX + w / 4));
YMinimum = ClipScore(centerY - h / 4);
YMaximum = ClipScore(centerY + h / 4);
}
else
{
if (w == 0)
{
w = 1;
}
XMinimum = ClipDate(DateTime.FromBinary(centerX - w));
XMaximum = ClipDate(DateTime.FromBinary(centerX + w));
if (h == 0)
{
h = 1;
}
YMinimum = ClipScore(centerY - h);
YMaximum = ClipScore(centerY + h);
}
}
