public void AutoSizeColumn(TreeColumn column)
{
if(!Columns.Contains(column))
throw new ArgumentException("column");
DrawContext context=new DrawContext();
context.Graphics=Graphics.FromImage(new Bitmap(1, 1));
context.Font=this.Font;
int res=0;
for(int row=0; row<RowCount; row++)
{
if(row<RowMap.Count)
{
int w=0;
TreeNodeAdv node=RowMap[row];
foreach(NodeControl nc in NodeControls)
{
if(nc.ParentColumn==column)
w+=nc.GetActualSize(node, _measureContext).Width;
}
res=Math.Max(res, w);
}
}
if(res>0)
column.Width=res;
}
public AutoRowHeightLayout(TreeViewAdv treeView, int rowHeight)
{
_rowCache=new List<Rectangle>();
_treeView=treeView;
PreferredRowHeight=rowHeight;
_measureContext=new DrawContext();
_measureContext.Graphics=Graphics.FromImage(new Bitmap(1, 1));
}
public TreeViewRowDrawEventArgs(Graphics graphics, Rectangle clipRectangle, TreeNodeAdv node, DrawContext context, int row, Rectangle rowRect)
: base(graphics, clipRectangle)
{
_node=node;
_context=context;
_row=row;
_rowRect=rowRect;
}
protected override void OnPaint(PaintEventArgs e)
{
BeginPerformanceCount();
PerformanceAnalyzer.Start("OnPaint");
DrawContext context=new DrawContext();
context.Graphics=e.Graphics;
context.Font=this.Font;
context.Enabled=Enabled;
int y=0;
int gridHeight=0;
if(UseColumns)
{
DrawColumnHeaders(e.Graphics);
y+=ColumnHeaderHeight;
if(Columns.Count==0||e.ClipRectangle.Height<=y)
return;
}
int firstRowY=_rowLayout.GetRowBounds(FirstVisibleRow).Y;
y-=firstRowY;
e.Graphics.ResetTransform();
e.Graphics.TranslateTransform(-OffsetX, y);
Rectangle displayRect=DisplayRectangle;
for(int row=FirstVisibleRow; row<RowCount; row++)
{
Rectangle rowRect=_rowLayout.GetRowBounds(row);
gridHeight+=rowRect.Height;
if(rowRect.Y+y>displayRect.Bottom)
break;
else
DrawRow(e, ref context, row, rowRect);
}
if((GridLineStyle&GridLineStyle.Vertical)==GridLineStyle.Vertical&&UseColumns)
DrawVerticalGridLines(e.Graphics, firstRowY);
if(_dropPosition.Node!=null&&DragMode&&HighlightDropPosition)
DrawDropMark(e.Graphics);
e.Graphics.ResetTransform();
DrawScrollBarsBox(e.Graphics);
if(DragMode&&_dragBitmap!=null)
e.Graphics.DrawImage(_dragBitmap, PointToClient(MousePosition));
PerformanceAnalyzer.Finish("OnPaint");
EndPerformanceCount(e);
}
private void CreateDragBitmap(IDataObject data)
{
if(UseColumns||!DisplayDraggingNodes)
return;
TreeNodeAdv[] nodes=data.GetData(typeof(TreeNodeAdv[])) as TreeNodeAdv[];
if(nodes!=null&&nodes.Length>0)
{
Rectangle rect=DisplayRectangle;
Bitmap bitmap=new Bitmap(rect.Width, rect.Height);
using(Graphics gr=Graphics.FromImage(bitmap))
{
gr.Clear(BackColor);
DrawContext context=new DrawContext();
context.Graphics=gr;
context.Font=Font;
context.Enabled=true;
int y=0;
int maxWidth=0;
foreach(TreeNodeAdv node in nodes)
{
if(node.Tree==this)
{
int x=0;
int height=_rowLayout.GetRowBounds(node.Row).Height;
foreach(NodeControl c in NodeControls)
{
Size s=c.GetActualSize(node, context);
if(!s.IsEmpty)
{
int width=s.Width;
rect=new Rectangle(x, y, width, height);
x+=(width+1);
context.Bounds=rect;
c.Draw(node, context);
}
}
y+=height;
maxWidth=Math.Max(maxWidth, x);
}
}
if(maxWidth>0&&y>0)
{
_dragBitmap=new Bitmap(maxWidth, y, PixelFormat.Format32bppArgb);
using(Graphics tgr=Graphics.FromImage(_dragBitmap))
tgr.DrawImage(bitmap, Point.Empty);
BitmapHelper.SetAlphaChanelValue(_dragBitmap, 150);
}
else
_dragBitmap=null;
}
}
}
public void DrawNode(TreeNodeAdv node, DrawContext context)
{
foreach(NodeControlInfo item in GetNodeControls(node))
{
if(item.Bounds.Right>=OffsetX&&item.Bounds.X-OffsetX<this.Bounds.Width)// skip invisible nodes
{
context.Bounds=item.Bounds;
context.Graphics.SetClip(context.Bounds);
item.Control.Draw(node, context);
context.Graphics.ResetClip();
}
}
}
private void DrawRow(PaintEventArgs e, ref DrawContext context, int row, Rectangle rowRect)
{
TreeNodeAdv node=RowMap[row];
context.DrawSelection=DrawSelectionMode.None;
context.CurrentEditorOwner=CurrentEditorOwner;
if(DragMode)
{
if((_dropPosition.Node==node)&&_dropPosition.Position==NodePosition.Inside&&HighlightDropPosition)
context.DrawSelection=DrawSelectionMode.Active;
}
else
{
if(node.IsSelected&&Focused)
context.DrawSelection=DrawSelectionMode.Active;
else if(node.IsSelected&&!Focused&&!HideSelection)
context.DrawSelection=DrawSelectionMode.Inactive;
}
context.DrawFocus=Focused&&CurrentNode==node;
OnRowDraw(e, node, context, row, rowRect);
if(FullRowSelect)
{
context.DrawFocus=false;
if(context.DrawSelection==DrawSelectionMode.Active||context.DrawSelection==DrawSelectionMode.Inactive)
{
Rectangle focusRect=new Rectangle(OffsetX, rowRect.Y, ClientRectangle.Width, rowRect.Height);
if(context.DrawSelection==DrawSelectionMode.Active)
{
e.Graphics.FillRectangle(highlightBrush, focusRect);
context.DrawSelection=DrawSelectionMode.FullRowSelect;
}
else
{
e.Graphics.FillRectangle(SystemBrushes.InactiveBorder, focusRect);
context.DrawSelection=DrawSelectionMode.None;
}
}
}
if((GridLineStyle&GridLineStyle.Horizontal)==GridLineStyle.Horizontal)
e.Graphics.DrawLine(SystemPens.InactiveBorder, 0, rowRect.Bottom, e.Graphics.ClipBounds.Right, rowRect.Bottom);
if(ShowLines)
DrawLines(e.Graphics, node, rowRect);
DrawNode(node, context);
}
