internal void PaintColumnHeaders(TreeRenderer renderer, ColumnHeaderCollection columns, Graphics g, bool treeControlHeader)
{
ColumnHeaderRendererEventArgs ce = new ColumnHeaderRendererEventArgs();
ce.Graphics = g;
ce.Tree = this.Tree;
ce.SortIndicatorColor = renderer.ColorTable.ColumnSortIndicatorColor;
ElementStyle defaultNormalStyle = GetDefaultColumnStyleNormal(renderer);
ElementStyle headerStyle = null;
if(treeControlHeader)
headerStyle = this.Tree.ColumnsBackgroundStyle == null ? GetDefaultHeaderStyle(renderer) : this.Tree.ColumnsBackgroundStyle;
else
headerStyle = this.Tree.NodesColumnsBackgroundStyle == null ? GetDefaultNodesHeaderStyle(renderer) : this.Tree.NodesColumnsBackgroundStyle;
if (Tree.ColumnStyleNormal != null && Tree.ColumnStyleNormal.Custom)
defaultNormalStyle = Tree.ColumnStyleNormal;
Point offset = Point.Empty;
if (this.Tree.AutoScroll)
{
offset = this.Tree.GetAutoScrollPositionOffset();
if (treeControlHeader)
offset.Y = 0;
}
Rectangle columnsBounds = columns.Bounds;
if (!treeControlHeader) columnsBounds.Offset(offset);
ElementStyleDisplayInfo di = new ElementStyleDisplayInfo(headerStyle, g, columnsBounds);
ElementStyleDisplay.Paint(di);
Color columnSeparator = (headerStyle != null && !headerStyle.BorderColor.IsEmpty) ? headerStyle.BorderColor : Color.Empty;
for (int i = 0; i < columns.Count; i++)
{
ColumnHeader column = columns.ColumnAtDisplayIndex(i);
if (!column.Visible) continue;
ElementStyle style = null;
if (column.StyleNormal != "")
style = Tree.Styles[column.StyleNormal].Copy();
else
style = defaultNormalStyle.Copy();
if (column.IsMouseDown)
{
if (column.StyleMouseDown != "")
style.ApplyStyle(Tree.Styles[column.StyleMouseDown]);
else if (Tree.ColumnStyleMouseDown != null)
style.ApplyStyle(Tree.ColumnStyleMouseDown);
}
else if (column.IsMouseOver)
{
if (column.StyleMouseOver != "")
style.ApplyStyle(Tree.Styles[column.StyleMouseOver]);
else if (Tree.ColumnStyleMouseOver != null)
style.ApplyStyle(Tree.ColumnStyleMouseOver);
}
ce.ColumnHeader = column;
Rectangle columnBounds = column.Bounds;
columnBounds.Offset(offset);
ce.Bounds = columnBounds;
ce.Style = style;
renderer.DrawColumnHeader(ce);
if (!columnSeparator.IsEmpty)
DisplayHelp.DrawLine(g, columnBounds.Right - (column.IsLastVisible ? 0 : 1), columnBounds.Y, columnBounds.Right - (column.IsLastVisible ? 0 : 1), columnBounds.Bottom - 1, columnSeparator, 1);
}
}
/// <summary>
/// Draws the column header. If you need to provide custom rendering this is the method that you should override in your custom rendered. If you
/// do not want default rendering to occur do not call the base implementation. You can call OnRenderColumnHeader method so events can occur.
/// </summary>
/// <param name="e">Information provided for rendering.</param>
public virtual void DrawColumnHeader(ColumnHeaderRendererEventArgs e)
{
OnRenderColumnHeader(e);
}
/// <summary>
/// Raises RenderDragDropMarker event.
/// </summary>
/// <param name="e">Event data.</param>
protected virtual void OnRenderColumnHeader(ColumnHeaderRendererEventArgs e)
{
if (RenderColumnHeader != null)
RenderColumnHeader(this, e);
}
internal void DrawColumnHeader(ColumnHeaderRendererEventArgs e, ElementStyleDisplayInfo di)
{
// Adjust the header bounds so the header is filled completely
if (e.Tree != null && e.Tree.CellHorizontalSpacing > 0 && !e.ColumnHeader.IsFirstVisible) {
Rectangle ob = di.Bounds;
di.Bounds = new Rectangle(ob.X - e.Tree.CellHorizontalSpacing, ob.Y, ob.Width + e.Tree.CellHorizontalSpacing, ob.Height);
ElementStyleDisplay.Paint(di);
di.Bounds = ob;
}
else
ElementStyleDisplay.Paint(di);
di.Bounds.Inflate(-1, -1);
if (di.Bounds.Width > 1 && di.Bounds.Height > 1)
{
if (e.ColumnHeader.IsFirstVisible)
{
Rectangle r = di.Bounds;
r.Width -= 3;
r.X += 3;
di.Bounds = r;
}
if (e.ColumnHeader.SortDirection != eSortDirection.None && !e.SortIndicatorColor.IsEmpty)
{
using (GraphicsPath sortShapePath = UIGraphics.GetTrianglePath(
new Point(di.Bounds.Right - 11, di.Bounds.Y + (di.Bounds.Height - 5) / 2), 9,
(e.ColumnHeader.SortDirection == eSortDirection.Ascending ? eTriangleDirection.Top : eTriangleDirection.Bottom)))
{
SmoothingMode sm = e.Graphics.SmoothingMode;
e.Graphics.SmoothingMode = SmoothingMode.Default;
using (SolidBrush brush = new SolidBrush(e.SortIndicatorColor))
e.Graphics.FillPath(brush, sortShapePath);
e.Graphics.SmoothingMode = sm;
}
di.Bounds.Width -= 12;
}
if (e.ColumnHeader.Image != null)
{
Image image = e.ColumnHeader.Image;
Rectangle r = di.Bounds;
if (e.ColumnHeader.ImageAlignment == eColumnImageAlignment.Left)
{
e.Graphics.DrawImage(image, r.X,
r.Y + (r.Height - image.Height) / 2, image.Width, image.Height);
r.X += image.Width + 2;
r.Width -= image.Width + 2;
}
else if (e.ColumnHeader.ImageAlignment == eColumnImageAlignment.Right)
{
e.Graphics.DrawImage(image, r.Right - image.Width,
r.Y + (r.Height - image.Height) / 2, image.Width, image.Height);
r.Width -= image.Width + 2;
}
di.Bounds = r;
}
ElementStyleDisplay.PaintText(di, e.ColumnHeader.Text, e.Tree.Font);
}
}