/// <summary>
/// Initialises a new instance of ComboTreeDropDown and associates it with its parent ComboTreeBox.
/// </summary>
/// <param name="sourceControl"></param>
public ComboTreeDropDown(ComboTreeBox sourceControl)
{
_visibleItems = new List <NodeInfo>();
_bitmaps = new Dictionary <BitmapInfo, Image>();
_scrollBar = new ScrollBarInfo();
AutoSize = false;
this._sourceControl = sourceControl;
RenderMode = ToolStripRenderMode.System;
BackColor = Color.White;
_dropDownHeight = 150;
_itemHeight = MIN_ITEM_HEIGHT;
Items.Add("");
_scrollRepeater = new Timer();
_scrollRepeater.Tick += new EventHandler(scrollRepeater_Tick);
}
/// <summary>
/// Paints the cell.
/// </summary>
/// <param name="graphics"></param>
/// <param name="clipBounds"></param>
/// <param name="cellBounds"></param>
/// <param name="rowIndex"></param>
/// <param name="cellState"></param>
/// <param name="value"></param>
/// <param name="formattedValue"></param>
/// <param name="errorText"></param>
/// <param name="cellStyle"></param>
/// <param name="advancedBorderStyle"></param>
/// <param name="paintParts"></param>
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)
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
BeforePaintContent(graphics, cellBounds, cellState, cellStyle, paintParts);
if (paintParts.HasFlag(DataGridViewPaintParts.ContentForeground))
{
ComboTreeBoxColumn column = (ComboTreeBoxColumn)OwningColumn;
ComboTreeNode node = Nodes.ParsePath(Convert.ToString(formattedValue), column.PathSeparator, column.UseNodeNamesForPath);
string displayValue;
if (column.ShowPath)
{
displayValue = Convert.ToString(formattedValue);
}
else
{
displayValue = (node != null) ? node.Text : String.Empty;
}
Image img = ComboTreeBox.GetNodeImage(node, column.Images, column.ImageIndex, column.ImageKey, column.ExpandedImageIndex, column.ExpandedImageKey);
Rectangle contentBounds = cellBounds;
contentBounds.Width -= 17;
TextFormatFlags flags = ComboTreeBox.TEXT_FORMAT_FLAGS | TextFormatFlags.PreserveGraphicsClipping;
Rectangle imgBounds = (img == null)
? new Rectangle(Point.Add(contentBounds.Location, new Size(1, 0)), Size.Empty)
: new Rectangle(contentBounds.Left + 4, contentBounds.Top + (contentBounds.Height / 2 - img.Height / 2), img.Width, img.Height);
Rectangle txtBounds = new Rectangle(imgBounds.Right, contentBounds.Top, contentBounds.Right - imgBounds.Right - 3, contentBounds.Height);
if (img != null)
{
graphics.DrawImage(img, imgBounds);
}
TextRenderer.DrawText(graphics, displayValue, cellStyle.Font, txtBounds, cellStyle.ForeColor, flags);
}
AfterPaintContent(graphics, clipBounds, cellBounds, rowIndex, cellStyle, advancedBorderStyle, paintParts);
}
public static void LoadComboTreeBoxList_(ComboTreeBox prmDropDownList, List <KeyValueDTOForTree> prmDataSource = null, DropDownListAction?prmDropDownListAction = null)
{
prmDropDownList.Nodes.Clear();
KeyValueDTOForTree firstItem = null;
if (prmDropDownListAction != null)
{
switch (prmDropDownListAction)
{
case DropDownListAction.All:
firstItem = new KeyValueDTOForTree()
{
Id = Constants.AllValue, Value1 = Constants.All
};
break;
case DropDownListAction.Select:
firstItem = new KeyValueDTOForTree()
{
Id = Constants.SelectValue, Value1 = Constants.Select
};
break;
}
}
if (prmDataSource != null)
{
prmDropDownList.Nodes.AddRange(ProcessDataForComboTreeBox(prmDataSource, prmDataSource[0].ParentId));
}
if (firstItem != null)
{
ComboTreeNode firstNode = new ComboTreeNode(firstItem.Value1);
firstNode.Tag = firstItem.Id;
prmDropDownList.Nodes.Insert(0, firstNode);
prmDropDownList.SelectedNode = firstNode;
}
prmDropDownList.ExpandAll();
}
