private void GanttRow_MouseMove(object sender, MouseEventArgs e)
{
_sameSizeCnt = 1;
if (_ProcessingMove || IsReadOnly)
{
return;
}
else
{
_ProcessingMove = true;
}
Point cursorPosition = e.GetPosition(this.RootUI());
List <GanttItem> items = ItemsPresenter.Children.OfType <GanttItem>().ToList();
for (int i = 0; i < items.Count; i++)
{
GanttItem item = items[i];
GeneralTransform gt = item.TransformToVisual(this.RootUI());
Point itemPosition = gt.Transform(new Point(0, 0));
double distance = 0d;
distance = cursorPosition.X - _DragStart.X;
if (item.DragState == DragState.ResizeLeft)
{
Cursor = Cursors.SizeWE;
}
else if (item.DragState == DragState.ResizeRight)
{
Cursor = Cursors.SizeWE;
}
else if (item.DragState == DragState.Whole)
{
Cursor = Cursors.Hand;
}
else
{
_ProcessingMove = false;
continue;
}
TimeSpan ts = GetTimeSpanFromDistance(distance);
#if DEBUG
ParentPanel.Content = item.Name;
ParentPanel.Content = distance.ToString() + " " + ts.ToString() + " " + item.DragState.ToString();
#endif
if (Math.Abs(ts.TotalDays) >= 1)
{
if (item.DragState == DragState.ResizeLeft)
{
ParentPanel.RaiseItemChanging(new GanttItemEventArgs(item));
DateTime newDate = item.Section.StartDate.Add(ts);
if (newDate < item.Section.EndDate)
{
item.Section.StartDate = newDate;
item.InvalidateMeasure();
if (RowIndex > 0)
{
(ParentPanel.RowPresenter.Children[RowIndex - 1] as GanttRow).Invalidate();
}
}
ParentPanel.RaiseItemChanged(new GanttItemEventArgs(item));
}
else if (item.DragState == DragState.ResizeRight)
{
ParentPanel.RaiseItemChanging(new GanttItemEventArgs(item));
DateTime newDate = item.Section.EndDate.Add(ts);
if (newDate > item.Section.StartDate)
{
item.Section.EndDate = newDate;
item.InvalidateMeasure();
if (RowIndex > 0)
{
(ParentPanel.RowPresenter.Children[RowIndex - 1] as GanttRow).Invalidate();
}
}
ParentPanel.RaiseItemChanged(new GanttItemEventArgs(item));
}
else if (item.DragState == DragState.Whole)
{
ParentPanel.RaiseItemChanging(new GanttItemEventArgs(item));
DateTime newStart = item.Section.StartDate.Add(ts);
DateTime newEnd = item.Section.EndDate.Add(ts);
if (distance > 0)
{
item.Section.EndDate = newEnd;
item.Section.StartDate = newStart;
}
else
{
item.Section.StartDate = newStart;
item.Section.EndDate = newEnd;
}
Invalidate();
// item.InvalidateArrange();
if (RowIndex > 0)
{
(ParentPanel.RowPresenter.Children[RowIndex - 1] as GanttRow).Invalidate();
}
ParentPanel.RaiseItemChanged(new GanttItemEventArgs(item));
}
_DragStart = e.GetPosition(this.RootUI());
}
}
_ProcessingMove = false;
}
