void mouseWheelHelper_MouseWheelMoved(object source, MouseWheelEventArgs eventArgs)
{
// Ctrl+колесо - масштабирование в IE
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
return;
}
// Shift+колесо - скроллинг по горизонтали
if (IsHorizontal)
{
if ((Keyboard.Modifiers & ModifierKeys.Shift) != ModifierKeys.Shift)
{
return;
}
}
else
{
if ((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)
{
return;
}
}
CustomMouseWheelSupport support = source as CustomMouseWheelSupport;
if (support != null)
{
ScrollBar scroller = support.ElementToAddMouseWheelSupportTo as ScrollBar;
if (scroller != null)
{
var delta = eventArgs.WheelDelta;
delta *= ScrollAmount;
var newOffset = scroller.Value - delta;
if (newOffset > scroller.Maximum)
{
newOffset = scroller.Maximum;
}
else if (newOffset < scroller.Minimum)
{
newOffset = scroller.Minimum;
}
scroller.Value = newOffset;
}
}
eventArgs.BrowserEventHandled = true;
}
public bool RemoveMouseWheelSupport(ScrollBar scrollBar)
{
if (mouseWheelHelper != null)
{
try
{
mouseWheelHelper.RemoveWheelSupport(scrollBar);
mouseWheelHelper = null;
return(true);
}
catch
{
return(false);
}
}
return(false);
}
/// <summary>
/// Adds mouse wheel support to a <see cref="ScrollViewer"/>.
/// As long as the <see cref="ScrollViewer"/> has focus,
/// the mouse wheel can be used to scroll up and down.
/// </summary>
/// <param name="scrollViewer">The scroll viewer.</param>
/// <returns>The <see cref="ScrollViewer"/>.</returns>
public ScrollBar AddMouseWheelSupport(ScrollBar scrollBar)
{
mouseWheelHelper = new CustomMouseWheelSupport(scrollBar, null);
mouseWheelHelper.MouseWheelMoved += new EventHandler <MouseWheelEventArgs>(mouseWheelHelper_MouseWheelMoved);
return(scrollBar);
}
/// <summary>
/// Adds mouse wheel support to a <see cref="ScrollViewer"/>.
/// As long as the <see cref="ScrollViewer"/> has focus,
/// the mouse wheel can be used to scroll up and down.
/// </summary>
/// <param name="scrollViewer">The scroll viewer.</param>
/// <returns>The <see cref="ScrollViewer"/>.</returns>
public ScrollBar AddMouseWheelSupport(ScrollBar scrollBar)
{
mouseWheelHelper = new CustomMouseWheelSupport(scrollBar, null);
mouseWheelHelper.MouseWheelMoved += new EventHandler<MouseWheelEventArgs>(mouseWheelHelper_MouseWheelMoved);
return scrollBar;
}
public bool RemoveMouseWheelSupport(ScrollBar scrollBar)
{
if (mouseWheelHelper!= null)
{
try
{
mouseWheelHelper.RemoveWheelSupport(scrollBar);
mouseWheelHelper = null;
return true;
}
catch
{
return false;
}
}
return false;
}