private void OnMouseMove(object sender, MouseEventArgs e)
{
if (lmbPressed)
{
// panning:
if (e.LeftButton == MouseButtonState.Released)
{
lmbPressed = false;
RevertChanges();
return;
}
Point screenMousePos = e.GetPosition(listeningPanel);
Point dataMousePos = screenMousePos.ScreenToViewport(activePlotter.Transform);
DataRect visible = activePlotter.Viewport.Visible;
double delta;
if (Placement.IsBottomOrTop())
{
delta = (dataMousePos - dragStartInViewport).X;
visible.XMin -= delta;
}
else
{
delta = (dataMousePos - dragStartInViewport).Y;
visible.YMin -= delta;
}
if (screenMousePos != lmbInitialPosition)
{
listeningPanel.Cursor = Placement.IsBottomOrTop() ? Cursors.ScrollWE : Cursors.ScrollNS;
}
activePlotter.Viewport.SetChangeType(Placement.GetPanChangeType());
activePlotter.Viewport.Visible = visible;
activePlotter.Viewport.SetChangeType();
e.Handled = true;
}
else if (rmbPressed)
{
// one direction zooming:
if (e.RightButton == MouseButtonState.Released)
{
rmbPressed = false;
RevertChanges();
return;
}
Point screenMousePos = e.GetPosition(listeningPanel);
DataRect visible = activePlotter.Viewport.Visible;
double delta;
bool isHorizontal = Placement.IsBottomOrTop();
if (isHorizontal)
{
delta = (screenMousePos - rmbInitialPosition).X;
}
else
{
delta = (screenMousePos - rmbInitialPosition).Y;
}
if (delta < 0)
{
delta = 1 / Math.Exp(-delta / RmbZoomScale);
}
else
{
delta = Math.Exp(delta / RmbZoomScale);
}
Point center = dragStartInViewport;
if (isHorizontal)
{
visible = rmbDragStartRect.ZoomX(center, delta);
}
else
{
visible = rmbDragStartRect.ZoomY(center, delta);
}
if (screenMousePos != lmbInitialPosition)
{
listeningPanel.Cursor = Placement.IsBottomOrTop() ? Cursors.ScrollWE : Cursors.ScrollNS;
}
activePlotter.Viewport.SetChangeType(Placement.GetZoomChangeType());
activePlotter.Viewport.Visible = visible;
activePlotter.Viewport.SetChangeType();
//e.Handled = true;
}
}