public ReorderColumnState(TreeViewAdv tree, TreeColumn column, Point initialMouseLocation)
: base(tree, column)
{
_location=new Point(initialMouseLocation.X+Tree.OffsetX, 0);
_dragOffset=tree.GetColumnX(column)-initialMouseLocation.X;
_ghostImage=column.CreateGhostImage(new Rectangle(0, 0, column.Width, tree.ColumnHeaderHeight), tree.Font);
}
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 override bool MouseMove(MouseEventArgs args)
{
_dropColumn=null;
_location=new Point(args.X+Tree.OffsetX, 0);
int x=0;
foreach(TreeColumn c in Tree.Columns)
{
if(c.IsVisible)
{
if(_location.X<x+c.Width/2)
{
_dropColumn=c;
break;
}
x+=c.Width;
}
}
Tree.UpdateHeaders();
return true;
}
public ClickColumnState(TreeViewAdv tree, TreeColumn column, Point location)
: base(tree, column)
{
_location=location;
}
public ResizeColumnState(TreeViewAdv tree, TreeColumn column, Point p)
: base(tree, column)
{
_initLocation=p;
_initWidth=column.Width;
}
private void UpdateToolTip(MouseEventArgs e)
{
TreeColumn col=GetColumnAt(e.Location);
if(col!=null)
{
if(col!=_tooltipColumn)
SetTooltip(col.TooltipText);
}
else
DisplayNodesTooltip(e);
_tooltipColumn=col;
}
internal int GetColumnX(TreeColumn column)
{
int x=-OffsetX;
foreach(TreeColumn col in Columns)
{
if(col.IsVisible)
{
if(column==col)
return x;
else
x+=col.Width;
}
}
return x;
}
