private void scrollTimer_Tick(object sender, EventArgs e)
{
if (this.scrollDelta == 0 || this.tableElement == null)
{
return;
}
RadScrollBarElement scrollBarElement = Control.ModifierKeys != Keys.Shift ? this.tableElement.VScrollBar : this.tableElement.HScrollBar;
int num = scrollBarElement.Value + this.scrollDelta;
if (num < scrollBarElement.Minimum)
{
num = scrollBarElement.Minimum;
}
else if (num > scrollBarElement.Maximum - scrollBarElement.LargeChange + 1)
{
num = scrollBarElement.Maximum - scrollBarElement.LargeChange + 1;
}
if (scrollBarElement.LargeChange > 0)
{
scrollBarElement.Value = num;
}
if (this.scrollReason == BaseGridBehavior.ScrollReason.PageUp)
{
this.NavigateToPage(this.GetFirstScrollableRow(this.tableElement, true), Keys.None);
}
else if (this.scrollReason == BaseGridBehavior.ScrollReason.PageDown)
{
this.NavigateToPage(this.GetLastScrollableRow(this.tableElement), Keys.None);
this.GridViewElement.TableElement.RowScroller.UpdateScrollRange();
}
this.scrollReason = BaseGridBehavior.ScrollReason.MouseWheel;
this.scrollDelta = 0;
this.scrollTimer.Stop();
}
protected virtual bool ProcessPageDownKey(KeyEventArgs keys)
{
this.tableElement = (GridTableElement)this.GridViewElement.CurrentView;
if (this.scrollDelta == 0)
{
this.scrollReason = BaseGridBehavior.ScrollReason.PageDown;
this.scrollTimer.Start();
}
this.scrollDelta += this.tableElement.ViewElement.ScrollableRows.Size.Height + (int)this.tableElement.ViewElement.ScrollableRows.ScrollOffset.Height;
return(true);
}
public BaseGridBehavior()
{
this.rowBehaviors = (IDictionary <System.Type, IGridBehavior>) new Dictionary <System.Type, IGridBehavior>();
this.scrollReason = BaseGridBehavior.ScrollReason.MouseWheel;
this.lockedBehavior = (IGridBehavior)null;
this.originalCursor = (Cursor)null;
this.scrollBarAtPoint = (RadScrollBarElement)null;
this.defaultRowBehavior = new GridRowBehavior();
this.RegisterBehavior(typeof(GridViewDataRowInfo), (IGridBehavior) new GridDataRowBehavior());
this.RegisterBehavior(typeof(GridViewNewRowInfo), (IGridBehavior) new GridNewRowBehavior());
this.RegisterBehavior(typeof(GridViewGroupRowInfo), (IGridBehavior) new GridGroupRowBehavior());
this.RegisterBehavior(typeof(GridViewFilteringRowInfo), (IGridBehavior) new GridFilterRowBehavior());
this.RegisterBehavior(typeof(GridViewTableHeaderRowInfo), (IGridBehavior) new GridHeaderRowBehavior());
this.RegisterBehavior(typeof(GridViewSearchRowInfo), (IGridBehavior) new GridSearchRowBehavior());
this.RegisterBehavior(typeof(GridViewHierarchyRowInfo), (IGridBehavior) new GridHierarchyRowBehavior());
this.RegisterBehavior(typeof(GridViewDetailsRowInfo), (IGridBehavior) new GridDetailViewRowBehavior());
this.scrollTimer = new Timer();
this.scrollTimer.Interval = 10;
this.scrollTimer.Tick += new EventHandler(this.scrollTimer_Tick);
}
protected virtual bool ProcessPageUpKey(KeyEventArgs keys)
{
this.tableElement = (GridTableElement)this.GridViewElement.CurrentView;
if (this.tableElement.ViewElement.ScrollableRows.Children.Count == 0)
{
return(false);
}
GridRowElement child = this.tableElement.ViewElement.ScrollableRows.Children[0] as GridRowElement;
if (child == null)
{
return(false);
}
if (this.scrollDelta == 0)
{
this.scrollReason = BaseGridBehavior.ScrollReason.PageUp;
this.scrollTimer.Start();
}
this.scrollDelta -= this.tableElement.ViewElement.ScrollableRows.Size.Height + (child.Size.Height - (int)this.tableElement.ViewElement.ScrollableRows.ScrollOffset.Height + this.tableElement.RowSpacing);
return(true);
}
