protected override void OnMouseMove(GLMouseEventArgs e)
{
base.OnMouseMove(e);
GLDataGridView dgv = Parent as GLDataGridView;
int xoff = e.Location.X + HorzScroll;
if (dragging == 0)
{
dgv.RowHeaderWidth = xoff + initialrowheaderwidth;
}
else if (dragging == -2)
{
dgv.ColumnHeaderHeight = e.Location.Y;
}
else if (dragging > 0)
{
int colx = xoff - dgv.ColumnPixelLeft(dragging - 1);
dgv.SetColumnWidth(dragging - 1, colx);
}
else
{
var over = Over(e.Location);
Cursor = (over != null && over.Item1 == ClickOn.Divider) ? GLWindowControl.GLCursorType.EW :
(over != null && over.Item1 == ClickOn.Height) ? GLWindowControl.GLCursorType.NS :
GLWindowControl.GLCursorType.Normal;
}
return;
}
// returns real row number
public GLDataGridView.RowColPos GridRowCol(Point p)
{
if (gridrowoffsets.Count > 0)
{
int y = ScrollOffset.Y + Math.Max(0, Math.Min(p.Y, ClientHeight)); // if mouse if captured, y may be well beyond grid, clip to it
int gridrow = gridrowoffsets.FindLastIndex(a => a < y);
if (gridrow >= 0 && gridrow < gridrowoffsets.Count - 1) // last entry is end of grid, either reject or accept
{
GLDataGridView dgv = Parent as GLDataGridView;
int xoffset = ScrollOffset.X + Math.Max(0, Math.Min(p.X, ClientWidth)); // clip X
for (int i = 0; i < dgv.Columns.Count; i++)
{
int left = dgv.ColumnPixelLeft(i);
if (xoffset >= left && xoffset < left + dgv.Columns[i].Width)
{
Point off = new Point(xoffset - left, y - gridrowoffsets[gridrow]);
Point cellloc = new Point(left, gridrowoffsets[gridrow] + dgv.CellBorderWidth);
gridrow += gridfirstline;
return(new GLDataGridView.RowColPos()
{
Row = gridrow, Column = i, Location = off, CellLocation = cellloc
});
}
}
}
}
return(null);
}
private Tuple <ClickOn, int, Point> Over(Point p)
{
GLDataGridView dgv = Parent as GLDataGridView;
int xoff = p.X + HorzScroll;
if (dgv.AllowUserToResizeColumns)
{
foreach (var c in dgv.Columns) // horz part, col headers
{
int hoff = xoff - dgv.ColumnPixelLeft(c.Index);
// System.Diagnostics.Debug.WriteLine($"loc {p} col {c.Index} {c.HeaderBounds} {hoff}");
if (hoff >= leftmargin && hoff <= rightmargin)
{
// System.Diagnostics.Debug.WriteLine($"Header mouse over divider {c.Index} {p}");
return(new Tuple <ClickOn, int, Point>(ClickOn.Divider, c.Index, Point.Empty));
}
}
if (dgv.Columns.Count > 0 && dgv.ColumnFillMode != GLDataGridView.ColFillMode.FillWidth)
{
int hoff = xoff - dgv.ColumnPixelRight(dgv.Columns.Count - 1);
if (hoff >= leftmargin && hoff <= rightmargin)
{
return(new Tuple <ClickOn, int, Point>(ClickOn.Divider, dgv.Columns.Count, new Point(hoff, p.Y)));
}
}
}
if (p.Y >= Height - bottommargin && dgv.AllowUserToResizeColumnHeight)
{
return(new Tuple <ClickOn, int, Point>(ClickOn.Height, -1, Point.Empty));
}
foreach (var c in dgv.Columns) // horz part, col headers
{
int left = dgv.ColumnPixelLeft(c.Index);
if (xoff > left && xoff < left + c.Width)
{
// System.Diagnostics.Debug.WriteLine($"Header mouse over {c.Index} {p}");
return(new Tuple <ClickOn, int, Point>(ClickOn.Header, c.Index, new Point(xoff - left, p.Y)));
}
}
return(null);
}
