private void SetVerticalOffset(double physicalOffset, bool updateUI, bool updateScrollViewer)
{
var adjustedOffset = GridModel.DoubleArithmetics.Ceiling(physicalOffset);
bool needUpdate = !LayoutDoubleUtil.AreClose(this.lastScrollOffset.Y, physicalOffset) || physicalOffset < 0;
this.lastScrollOffset.Y = adjustedOffset;
if (needUpdate)
{
if (updateUI && this.CellsPanel != null)
{
if ((this.model.pendingMeasureFlags & InvalidateMeasureFlags.Header) == InvalidateMeasureFlags.Header && this.columnHeadersPanel != null)
{
this.columnHeadersPanel.Measure();
this.columnHeadersPanel.Arrange();
}
this.CellsPanel.Measure();
this.CellsPanel.Arrange();
}
if (updateScrollViewer)
{
this.ScrollViewer.ChangeView(null, adjustedOffset, null, true);
////Ensure that scrollviewer has updated its position.
if (updateUI)
{
this.ScrollViewer.UpdateLayout();
}
}
}
}
private void SetHorizontalOffset(double physicalOffset, bool updateUI, bool updateScrollViewer)
{
var adjustedOffset = GridModel.DoubleArithmetics.Ceiling(physicalOffset);
bool needUpdate = !LayoutDoubleUtil.AreClose(this.lastScrollOffset.X, physicalOffset) || physicalOffset < 0;
this.lastScrollOffset.X = adjustedOffset;
if (needUpdate)
{
// TODO: The updateUI flag should be removed and all the needed updates should be processed by the UpdateService
if (updateUI)
{
if (this.columnHeadersPanel != null)
{
this.columnHeadersPanel.Measure();
this.columnHeadersPanel.Arrange();
}
if (this.CellsPanel != null)
{
this.CellsPanel.Measure();
this.CellsPanel.Arrange();
}
}
if (updateScrollViewer)
{
this.ScrollViewer.ChangeView(adjustedOffset, null, null, true);
// Ensure that scrollviewer has updated its position.
if (updateUI)
{
this.ScrollViewer.UpdateLayout();
}
}
}
}
