//////////////////////////////////////////////////////////////////////////////////////
//
// scale + offset dragging
//
//////////////////////////////////////////////////////////////////////////////////////
private void ItemsControl_MouseDown(object sender, MouseButtonEventArgs e)
{
if (!this.dragwatcherinstalled &&
((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != 0 &&
(e.MiddleButton == MouseButtonState.Pressed || e.LeftButton == MouseButtonState.Pressed)))
{
ItemsControl ic = (ItemsControl)sender;
Mouse.Capture(ic);
this.dragpoint = e.GetPosition(ic); // position relativ zum itemscontrol!!
// die listbox aus der datatemplate-instanz muss erst noch ermittelt werden
Grid grid = (Grid)LogicalTreeHelper.GetParent(ic);
ListBox listbox = (ListBox)grid.FindName("listbox");
if (listbox.SelectedItem == null)
{
listbox.SelectedIndex = 0;
}
/*
* dragselectedrenderslice = (RenderSlice) listbox.SelectedItem;
*
* dragscale = dragselectedrenderslice.Scale;
* dragoffset = dragselectedrenderslice.Offset;
*/
// die folgende liste NICHT mit linq zusammenbauen!!
// das ist dann saulahm!! ich glaub er re-evaluiert die abfrage, sobald offset/scale
// verändert wird => changed-event (INotifyPropertyChanged in RenderSlice)
this.dragselectedrenderslices = new List <DragScaleOffsetInfo>();
foreach (RenderSlice rs in listbox.SelectedItems)
{
this.dragselectedrenderslices.Add(new DragScaleOffsetInfo(rs));
}
this.dragInvolvedRenderers = RendererManager.GetInvolvedRenderers(from RenderSlice rs in listbox.SelectedItems select rs);
// Keyboard.Modifiers == None ist für das time-scroll&stretch in signalviewercontrol
if ((Keyboard.Modifiers & (ModifierKeys.Control | ModifierKeys.Shift)) != 0)
{
ic.PreviewMouseMove += this.ItemsControl_PreviewMouseMove_ScaleAndOffset;
this.dragwatcherinstalled = true;
}
e.Handled = true;
}
}
private void MenuItem_Click_Invert(object sender, RoutedEventArgs e)
{
MenuItem mi = (MenuItem)sender;
ObservableCollection <RenderSlice> rslist = (ObservableCollection <RenderSlice>)mi.DataContext;
IEnumerable <RenderSlice> selectedrs = this.GetSelectedRenderSlices(rslist);
foreach (RenderSlice rs in selectedrs)
{
// Inverst the scaling factor and calculate new range
rs.Scale = -rs.Scale;
float min = -rs.Offset;
float max = (float)rs.Range - rs.Offset;
// Update range and offset.
rs.Zoominfo.PhysicalMax = max > min ? max : min;
rs.Zoominfo.PhysicalMin = max > min ? min : max;
rs.Offset = -max;
}
// Draw inversted signal
RendererManager.UpdateRenderers(RendererManager.GetInvolvedRenderers(selectedrs));
}