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));
}
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);
}
public void DrawNode(TreeNodeAdv node, DrawContext context)
{
foreach (NodeControlInfo item in GetNodeControls(node))
{
if (item.Bounds.X >= 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();
}
}
}
public TreeViewAdv()
{
InitializeComponent();
SetStyle(ControlStyles.AllPaintingInWmPaint
| ControlStyles.UserPaint
| ControlStyles.OptimizedDoubleBuffer
| ControlStyles.ResizeRedraw
| ControlStyles.Selectable
, true);
if (Application.RenderWithVisualStyles)
_columnHeaderHeight = 20;
else
_columnHeaderHeight = 17;
//BorderStyle = BorderStyle.Fixed3D;
_hScrollBar.Height = SystemInformation.HorizontalScrollBarHeight;
_vScrollBar.Width = SystemInformation.VerticalScrollBarWidth;
_rowLayout = new FixedRowHeightLayout(this, RowHeight);
_rowMap = new List<TreeNodeAdv>();
_selection = new List<TreeNodeAdv>();
_readonlySelection = new ReadOnlyCollection<TreeNodeAdv>(_selection);
_columns = new TreeColumnCollection(this);
_toolTip = new ToolTip();
_measureContext = new DrawContext();
_measureContext.Font = Font;
_measureContext.Graphics = Graphics.FromImage(new Bitmap(1, 1));
Input = new NormalInputState(this);
_search = new IncrementalSearch(this);
CreateNodes();
CreatePens();
ArrangeControls();
_plusMinus = new NodePlusMinus();
_controls = new NodeControlsCollection(this);
Font = _font;
ExpandingIcon.IconChanged += ExpandingIconChanged;
}
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;
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(SystemBrushes.Highlight, 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);
}
private void DrawIcons()
{
Graphics gr = Graphics.FromHwnd(this.Handle);
int firstRowY = _rowLayout.GetRowBounds(FirstVisibleRow).Y;
DrawContext context = new DrawContext();
context.Graphics = gr;
for (int i = 0; i < _expandingNodes.Count; i++)
{
foreach (NodeControlInfo info in GetNodeControls(_expandingNodes[i]))
if (info.Control is ExpandingIcon)
{
Rectangle rect = info.Bounds;
rect.X -= OffsetX;
rect.Y -= firstRowY;
context.Bounds = rect;
info.Control.Draw(info.Node, context);
}
}
gr.Dispose();
}
public void DrawNode(TreeNodeAdv node, DrawContext context)
{
foreach (NodeControlInfo item in GetNodeControls(node))
{
context.Bounds = item.Bounds;
context.Graphics.SetClip(item.Bounds);
item.Control.Draw(node, context);
context.Graphics.ResetClip();
}
}
protected override void OnPaint(PaintEventArgs e)
{
DrawContext context = new DrawContext();
context.Graphics = e.Graphics;
context.Font = this.Font;
context.Enabled = Enabled;
int y = 0;
if (UseColumns)
{
DrawColumnHeaders(e.Graphics);
y = ColumnHeaderHeight;
if (Columns.Count == 0)
return;
}
e.Graphics.ResetTransform();
e.Graphics.TranslateTransform(-OffsetX, y - (FirstVisibleRow * RowHeight));
int row = FirstVisibleRow;
while (row < RowCount && row - FirstVisibleRow <= PageRowCount)
{
TreeNodeAdv node = _rowMap[row];
context.DrawSelection = DrawSelectionMode.None;
context.CurrentEditorOwner = _currentEditorOwner;
if (_dragMode)
{
if ((_dropPosition.Node == node) && _dropPosition.Position == NodePosition.Inside)
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;
if (FullRowSelect)
{
context.DrawFocus = false;
if (context.DrawSelection == DrawSelectionMode.Active || context.DrawSelection == DrawSelectionMode.Inactive)
{
Rectangle focusRect = new Rectangle(OffsetX, row * RowHeight, ClientRectangle.Width, RowHeight);
if (context.DrawSelection == DrawSelectionMode.Active)
{
e.Graphics.FillRectangle(SystemBrushes.Highlight, focusRect);
context.DrawSelection = DrawSelectionMode.FullRowSelect;
}
else
{
e.Graphics.FillRectangle(SystemBrushes.InactiveBorder, focusRect);
context.DrawSelection = DrawSelectionMode.None;
}
}
}
if (ShowLines)
DrawLines(e.Graphics, node);
DrawNode(node, context);
row++;
}
if (_dropPosition.Node != null && _dragMode)
DrawDropMark(e.Graphics);
e.Graphics.ResetTransform();
DrawScrollBarsBox(e.Graphics);
}
