protected override void ExecuteScrollCommand(ScrollCommandKind command)
{
var commandOrientation = ScrollViewUtils.GetCommandOrientation(command);
var orientation = Orientation;
var orientedViewport = Viewport.AsOriented(orientation);
var orientedExtent = Extent.AsOriented(orientation);
var orientedOffset = Offset.AsOriented(orientation);
var directScrollView = new OrientedScrollView(orientation, orientedViewport.Direct, orientedExtent.Direct,
orientedOffset.Direct);
var indirectScrollView = new OrientedScrollView(orientation.Rotate(), orientedViewport.Indirect,
orientedExtent.Indirect, orientedOffset.Indirect);
directScrollView.ExecuteScrollCommand(command,
commandOrientation == orientation
? ScrollViewUtils.DefaultUnitSmallChange
: ScrollViewUtils.DefaultPixelSmallChange,
commandOrientation == orientation
? ScrollViewUtils.DefaultUnitWheelChange
: ScrollViewUtils.DefaultPixelWheelChange);
indirectScrollView.ExecuteScrollCommand(command,
commandOrientation != orientation
? ScrollViewUtils.DefaultUnitSmallChange
: ScrollViewUtils.DefaultPixelSmallChange,
commandOrientation != orientation
? ScrollViewUtils.DefaultUnitWheelChange
: ScrollViewUtils.DefaultPixelWheelChange);
orientedOffset.Direct = directScrollView.Offset;
orientedOffset.Indirect = indirectScrollView.Offset;
Offset = orientedOffset.Vector;
}
public static Orientation?GetCommandOrientation(ScrollCommandKind command)
{
switch (command)
{
case ScrollCommandKind.LineUp:
case ScrollCommandKind.LineDown:
case ScrollCommandKind.PageUp:
case ScrollCommandKind.PageDown:
case ScrollCommandKind.MouseWheelUp:
case ScrollCommandKind.MouseWheelDown:
case ScrollCommandKind.ScrollToTop:
case ScrollCommandKind.ScrollToBottom:
return(Orientation.Vertical);
case ScrollCommandKind.LineLeft:
case ScrollCommandKind.LineRight:
case ScrollCommandKind.PageLeft:
case ScrollCommandKind.PageRight:
case ScrollCommandKind.MouseWheelLeft:
case ScrollCommandKind.MouseWheelRight:
case ScrollCommandKind.ScrollToLeft:
case ScrollCommandKind.ScrollToRight:
return(Orientation.Horizontal);
case ScrollCommandKind.ScrollToHome:
case ScrollCommandKind.ScrollToEnd:
return(null);
default:
throw new ArgumentOutOfRangeException(nameof(command), command, null);
}
}
public void ExecuteScrollCommand(ScrollCommandKind command)
{
}
public static Vector ExecuteScrollCommand(Vector offset, ScrollCommandKind command, Size viewport, Size extent, double smallChange, double wheelChange)
{
switch (command)
{
case ScrollCommandKind.LineUp:
offset.Y -= smallChange;
break;
case ScrollCommandKind.LineDown:
offset.Y += smallChange;
break;
case ScrollCommandKind.LineLeft:
offset.X -= smallChange;
break;
case ScrollCommandKind.LineRight:
offset.X += smallChange;
break;
case ScrollCommandKind.PageUp:
offset.Y -= viewport.Height;
break;
case ScrollCommandKind.PageDown:
offset.Y += viewport.Height;
break;
case ScrollCommandKind.PageLeft:
offset.X -= viewport.Width;
break;
case ScrollCommandKind.PageRight:
offset.X += viewport.Width;
break;
case ScrollCommandKind.MouseWheelUp:
offset.Y -= wheelChange;
break;
case ScrollCommandKind.MouseWheelDown:
offset.Y += wheelChange;
break;
case ScrollCommandKind.MouseWheelLeft:
offset.X -= wheelChange;
break;
case ScrollCommandKind.MouseWheelRight:
offset.X += wheelChange;
break;
case ScrollCommandKind.ScrollToHome:
offset = new Vector(0, 0);
break;
case ScrollCommandKind.ScrollToBottom:
offset.Y = extent.Height - viewport.Height;
break;
case ScrollCommandKind.ScrollToTop:
offset.Y = 0;
break;
case ScrollCommandKind.ScrollToRight:
offset.X = extent.Width - viewport.Width;
break;
case ScrollCommandKind.ScrollToLeft:
offset.X = 0;
break;
case ScrollCommandKind.ScrollToEnd:
offset = new Vector(extent.Width - viewport.Width, extent.Height - viewport.Height);
break;
default:
throw new ArgumentOutOfRangeException(nameof(command));
}
return(offset);
}
