protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
{
if (!paddingok)
{
PrepareDraw();
cellStyle.Padding = Style.Padding;
}
DataGridViewRow xrow = this.DataGridView.Rows[rowIndex];
if (!(xrow is TreeGridRow))
{
return;
}
TreeGridRow node = (TreeGridRow)xrow;
if (node == null)
{
return;
}
Image image = node.Image;
if (this._imageHeight == 0 && image != null)
{
this.UpdateStyle();
}
// paint the cell normally
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
// TODO: Indent width needs to take image size into account
Rectangle glyphRect = new Rectangle(cellBounds.X + this.GlyphMargin, cellBounds.Y, INDENT_WIDTH, cellBounds.Height - 1);
int glyphHalf = glyphRect.Width / 2;
//TODO: This painting code needs to be rehashed to be cleaner
int level = this.Level;
//TODO: Rehash this to take different Imagelayouts into account. This will speed up drawing
// for images of the same size (ImageLayout.None)
if (image != null)
{
Point pp;
if (_imageHeight > cellBounds.Height)
{
pp = new Point(glyphRect.X + this.glyphWidth, cellBounds.Y + _imageHeightOffset);
}
else
{
pp = new Point(glyphRect.X + this.glyphWidth, (cellBounds.Height / 2 - _imageHeight / 2) + cellBounds.Y);
}
// Graphics container to push/pop changes. This enables us to set clipping when painting
// the cell's image -- keeps it from bleeding outsize of cells.
System.Drawing.Drawing2D.GraphicsContainer gc = graphics.BeginContainer();
{
graphics.SetClip(cellBounds);
graphics.DrawImageUnscaled(image, pp);
}
graphics.EndContainer(gc);
}
// Paint tree lines
if (((TreeGridAdvanced)(DataGridView)).ShowLines)
{
using (Pen linePen = new Pen(SystemBrushes.ControlDark, 1.0f))
{
linePen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dot;
bool isLastSibling = node.IsLastSibling;
bool isFirstSibling = node.IsFirstSibling;
if (node.Level == 1)
{
// the Root nodes display their lines differently
if (isFirstSibling && isLastSibling)
{
// only node, both first and last. Just draw horizontal line
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
}
else if (isLastSibling)
{
// last sibling doesn't draw the line extended below. Paint horizontal then vertical
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2);
}
else if (isFirstSibling)
{
// first sibling doesn't draw the line extended above. Paint horizontal then vertical
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.X + 4, cellBounds.Bottom);
}
else
{
// normal drawing draws extended from top to bottom. Paint horizontal then vertical
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top, glyphRect.X + 4, cellBounds.Bottom);
}
}
else
{
if (isLastSibling)
{
// last sibling doesn't draw the line extended below. Paint horizontal then vertical
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2);
}
else
{
// normal drawing draws extended from top to bottom. Paint horizontal then vertical
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top + cellBounds.Height / 2, glyphRect.Right, cellBounds.Top + cellBounds.Height / 2);
graphics.DrawLine(linePen, glyphRect.X + 4, cellBounds.Top, glyphRect.X + 4, cellBounds.Bottom);
}
// paint lines of previous levels to the root
TreeGridRow previousNode = node.Parent;
int horizontalStop = (glyphRect.X + 4) - INDENT_WIDTH;
if (previousNode != null)
{
while (!previousNode.IsRoot)
{
if (previousNode.HasChildren && !previousNode.IsLastSibling)
{
// paint vertical line
graphics.DrawLine(linePen, horizontalStop, cellBounds.Top, horizontalStop, cellBounds.Bottom);
}
previousNode = previousNode.Parent;
horizontalStop = horizontalStop - INDENT_WIDTH;
if (previousNode == null)
{
break;
}
}
}
}
}
}
if (node.HasChildren)
{
TreeGridAdvanced _grid = (TreeGridAdvanced)DataGridView;
// Paint node glyphs
if (node.Node.Expanded)
{
if (_grid.themesenabled)
{
try
{
if (_grid.rOpen == null)
{
_grid.rOpen = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);
_grid.treeboxwidth = System.Convert.ToInt32(WinFormsGraphics.DPIScale * 10);
}
_grid.rOpen.DrawBackground(graphics, new Rectangle(glyphRect.X, glyphRect.Y + (glyphRect.Height / 2) - 4,
_grid.treeboxwidth, _grid.treeboxwidth));
/*
* Pen npen = Pens.Black;
* int recwidth = 8;
* int margin = 2;
* int leftmargin = -recwidth / 2 - 2;
* int topmargin = 0;
* Rectangle nrect = new Rectangle(leftmargin + glyphRect.X + glyphRect.Width / 2 - recwidth / 2,
* topmargin + glyphRect.Y + glyphRect.Height / 2 - recwidth / 2,
* recwidth,
* recwidth);
* graphics.DrawLine(npen, new Point(nrect.X + margin, nrect.Top + recwidth / 2),
* new Point(nrect.X + recwidth - margin, nrect.Top + recwidth / 2));*/
}
catch
{
_grid.themesenabled = false;
}
}
if (!_grid.themesenabled)
{
Pen npen = Pens.Black;
int recwidth = 8;
int margin = 2;
int leftmargin = -recwidth / 2 - 2;
int topmargin = 0;
Rectangle nrect = new Rectangle(leftmargin + glyphRect.X + glyphRect.Width / 2 - recwidth / 2,
topmargin + glyphRect.Y + glyphRect.Height / 2 - recwidth / 2,
recwidth,
recwidth);
using (Brush nbrush = new SolidBrush(cellStyle.BackColor))
{
graphics.FillRectangle(nbrush, nrect);
graphics.DrawRectangle(npen, nrect);
graphics.DrawLine(npen, new Point(nrect.X + margin, nrect.Top + recwidth / 2),
new Point(nrect.X + recwidth - margin, nrect.Top + recwidth / 2));
}
}
}
else
{
if (_grid.themesenabled)
{
try
{
if (_grid.rClosed == null)
{
_grid.rClosed = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);
_grid.treeboxwidth = System.Convert.ToInt32(WinFormsGraphics.DPIScale * 10);
}
// node._grid.rClosed = new VisualStyleRenderer("Explorer::TreeView",2,1);
_grid.rClosed.DrawBackground(graphics, new Rectangle(glyphRect.X, glyphRect.Y + (glyphRect.Height / 2) - 4, _grid.treeboxwidth, _grid.treeboxwidth));
}
catch
{
_grid.themesenabled = false;
}
}
if (!_grid.themesenabled)
{
Pen npen = Pens.Black;
int recwidth = 8;
int margin = 2;
int leftmargin = -recwidth / 2 - 2;
int topmargin = 0;
using (Brush nbrush = new SolidBrush(cellStyle.BackColor))
{
Rectangle nrect = new Rectangle(leftmargin + glyphRect.X + glyphRect.Width / 2 - recwidth / 2,
topmargin + glyphRect.Y + glyphRect.Height / 2 - recwidth / 2,
recwidth,
recwidth);
graphics.FillRectangle(nbrush, nrect);
graphics.DrawRectangle(npen, nrect);
graphics.DrawLine(npen, new Point(nrect.X + margin, nrect.Top + recwidth / 2),
new Point(nrect.X + recwidth - margin, nrect.Top + recwidth / 2));
graphics.DrawLine(npen, new Point(nrect.X + recwidth / 2, nrect.Top + margin),
new Point(nrect.X + recwidth / 2, nrect.Top + recwidth - margin));
}
}
}
}
}
// Performance bottleneck
internal protected virtual void UpdateStyle()
{
if (this.RowIndex < 0)
{
return;
}
if (paddingok)
{
return;
}
int level = this.Level;
Size preferredSize;
// This line consumes lot of memory
Graphics g = ((TreeGridAdvanced)DataGridView).GetGraphics();
// Graphics g = ((TreeGridView)this.DataGridView).GetGraphics();
preferredSize = this.GetPreferredSize(g, this.InheritedStyle, this.RowIndex, new Size(0, 0));
//preferredSize = new Size(20, 21);
Image image = ((TreeGridRow)DataGridView.Rows[RowIndex]).Image;
if (image != null)
{
// calculate image size
_imageWidth = image.Width + 2;
_imageHeight = image.Height + 2;
}
else
{
_imageWidth = glyphWidth;
_imageHeight = 0;
}
Padding p = new Padding();
// TODO: Make this cleaner
if (preferredSize.Height < _imageHeight)
{
int leftpad = p.Left + (level * INDENT_WIDTH) + _imageWidth + INDENT_MARGIN;
// Performance bottleneck changing padding takes lot of time
TreeGridAdvanced _grid = (TreeGridAdvanced)this.DataGridView;
if (_grid.paddings_list.IndexOfKey(leftpad) >= 0)
{
this.Style = _grid.paddings_list.Values[leftpad];
}
else
{
Padding npad = new Padding(leftpad,
p.Top + (_imageHeight / 2), p.Right, p.Bottom + (_imageHeight / 2));
this.Style.Padding = npad;
_grid.paddings_list.Add(leftpad, this.Style);
}
_imageHeightOffset = 2;// (_imageHeight - preferredSize.Height) / 2;
}
else
{
int leftpad = p.Left + (level * INDENT_WIDTH) + _imageWidth + INDENT_MARGIN;
Padding oldpad = this.Style.Padding;
// if ((oldpad.Left != npad.Left) || (oldpad.Top != npad.Top) || (oldpad.Right != npad.Right) || (oldpad.Bottom != npad.Bottom))
if (oldpad.Left != leftpad)
{
// Performance bottleneck changing padding takes lot of time
TreeGridAdvanced _grid = (TreeGridAdvanced)this.DataGridView;
if (_grid.paddings_list.IndexOfKey(leftpad) >= 0)
{
this.Style = _grid.paddings_list[leftpad];
}
else
{
Padding npad = new Padding(leftpad,
p.Top, p.Right, p.Bottom);
this.Style.Padding = npad;
_grid.paddings_list.Add(leftpad, this.Style);
}
}
}
calculatedLeftPadding = ((level - 1) * glyphWidth) + _imageWidth + INDENT_MARGIN;
paddingok = true;
}