/// <summary>
/// Draw one cell of the header
/// </summary>
/// <param name="g"></param>
/// <param name="columnIndex"></param>
/// <param name="itemState"></param>
protected void CustomDrawHeaderCell(Graphics g, int columnIndex, int itemState)
{
Rectangle r = GetItemRect(columnIndex);
OLVColumn column = ListView.GetColumn(columnIndex);
const int CDIS_SELECTED = 1;
bool isPressed = ((itemState & CDIS_SELECTED) == CDIS_SELECTED);
// Calculate which style should be used for the header
HeaderStateStyle stateStyle = CalculateStyle(column, columnIndex == ColumnIndexUnderCursor, isPressed);
// If there is an owner drawn delegate installed, give it a chance to draw the header
if (column.HeaderDrawing != null)
{
if (!column.HeaderDrawing(g, r, columnIndex, column, isPressed, stateStyle))
{
return;
}
}
// Draw the background
if (ListView.HeaderUsesThemes &&
VisualStyleRenderer.IsSupported &&
VisualStyleRenderer.IsElementDefined(VisualStyleElement.Header.Item.Normal))
{
DrawThemedBackground(g, r, columnIndex, isPressed);
}
else
{
DrawUnthemedBackground(g, r, columnIndex, isPressed, stateStyle);
}
// Draw the sort indicator if this column has one
if (HasSortIndicator(column))
{
if (ListView.HeaderUsesThemes &&
VisualStyleRenderer.IsSupported &&
VisualStyleRenderer.IsElementDefined(VisualStyleElement.Header.SortArrow.SortedUp))
{
DrawThemedSortIndicator(g, r);
}
else
{
r = DrawUnthemedSortIndicator(g, r);
}
}
if (HasFilterIndicator(column))
{
r = DrawFilterIndicator(g, r);
}
// Finally draw the text
DrawHeaderImageAndText(g, r, column, stateStyle);
}
/// <summary>
/// Draw one cell of the header
/// </summary>
/// <param name="g"></param>
/// <param name="columnIndex"></param>
/// <param name="itemState"></param>
protected void CustomDrawHeaderCell(Graphics g, int columnIndex, int itemState)
{
OLVColumn column = ListView.GetColumn(columnIndex);
bool hasCheckBox = HasCheckBox(column);
bool isMouseOverCheckBox = columnIndex == lastCheckBoxUnderCursor;
bool isMouseDownOnCheckBox = isMouseOverCheckBox && Control.MouseButtons == MouseButtons.Left;
bool isHot = (columnIndex == ColumnIndexUnderCursor) && (!(hasCheckBox && isMouseOverCheckBox));
const int CDIS_SELECTED = 1;
bool isPressed = ((itemState & CDIS_SELECTED) == CDIS_SELECTED);
// System.Diagnostics.Debug.WriteLine(String.Format("{2:hh:mm:ss.ff} - HeaderCustomDraw: {0}, {1}", columnIndex, itemState, DateTime.Now));
// Calculate which style should be used for the header
HeaderStateStyle stateStyle = CalculateStateStyle(column, isHot, isPressed);
// If there is an owner drawn delegate installed, give it a chance to draw the header
Rectangle fullCellBounds = GetItemRect(columnIndex);
if (column.HeaderDrawing != null)
{
if (!column.HeaderDrawing(g, fullCellBounds, columnIndex, column, isPressed, stateStyle))
{
return;
}
}
// Draw the background
if (ListView.HeaderUsesThemes &&
VisualStyleRenderer.IsSupported &&
VisualStyleRenderer.IsElementDefined(VisualStyleElement.Header.Item.Normal))
{
DrawThemedBackground(g, fullCellBounds, columnIndex, isPressed, isHot);
}
else
{
DrawUnthemedBackground(g, fullCellBounds, columnIndex, isPressed, isHot, stateStyle);
}
Rectangle r = GetHeaderDrawRect(columnIndex);
// Draw the sort indicator if this column has one
if (HasSortIndicator(column))
{
if (ListView.HeaderUsesThemes &&
VisualStyleRenderer.IsSupported &&
VisualStyleRenderer.IsElementDefined(VisualStyleElement.Header.SortArrow.SortedUp))
{
DrawThemedSortIndicator(g, r);
}
else
{
r = DrawUnthemedSortIndicator(g, r);
}
}
if (hasCheckBox)
{
r = DrawCheckBox(g, r, column.HeaderCheckState, column.HeaderCheckBoxDisabled, isMouseOverCheckBox, isMouseDownOnCheckBox);
}
// Debugging - Where is the text going to be drawn
// g.DrawRectangle(Pens.Blue, r);
// Finally draw the text
DrawHeaderImageAndText(g, r, column, stateStyle);
}
