private void Workbench_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left)
{
leftPressed = true;
Workbench workbench = (Workbench)sender;
startingPointMM = workbench.GetPointMMAtOffset(e.GetPosition((Workbench)sender));
}
}
private void Workbench_MouseMove(object sender, MouseEventArgs e)
{
if (leftPressed)
{
Workbench workbench = (Workbench)sender;
Point offset = e.GetPosition(workbench);
Point newOffset = workbench.GetOffsetAtPointMM(startingPointMM);
workbench.Pan(new Vector(newOffset.X - offset.X, newOffset.Y - offset.Y));
}
}
public WorkbenchInput(Workbench workbench)
{
workbench.MouseLeave += Workbench_MouseLeave;
workbench.MouseDown += Workbench_MouseDown;
workbench.MouseUp += Workbench_MouseUp;
workbench.MouseMove += Workbench_MouseMove;
workbench.MouseWheel += Workbench_MouseWheel;
}
private static void DocumentPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Workbench _this = (Workbench)d;
if (e.OldValue != null)
{
((Document)e.OldValue).Modified -= _this.Document_Modified;
}
if (e.NewValue != null)
{
((Document)e.NewValue).Modified += _this.Document_Modified;
}
_this.graphicsStale = true;
}
private void Workbench_MouseWheel(object sender, MouseWheelEventArgs e)
{
Workbench workbench = (Workbench)sender;
Point offset = e.GetPosition(workbench);
Point originalMM = workbench.GetPointMMAtOffset(offset);
double newZoom = workbench.ViewZoom * Math.Pow(2.0, e.Delta / 480.0);
if (newZoom < Workbench.ZoomMin)
{
newZoom = Workbench.ZoomMin;
}
if (newZoom > Workbench.ZoomMax)
{
newZoom = Workbench.ZoomMax;
}
workbench.ViewZoom = newZoom;
Point newOffset = workbench.GetOffsetAtPointMM(originalMM);
workbench.Pan(newOffset - offset);
}