/// <summary>
/// Raises the MouseDown event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseDown(CellMouseEventArgs e)
{
base.OnMouseDown(e);
if (this.ShowDropDownButton || (e.Table.IsEditing && e.CellPos == e.Table.EditingCell))
{
if (e.Table.IsCellEditable(e.CellPos))
{
// get the button renderer data
DropDownRendererData rendererData = this.GetDropDownRendererData(e.Cell);
if (this.CalcDropDownButtonBounds().Contains(e.X, e.Y))
{
if (!(e.Table.ColumnModel.GetCellEditor(e.CellPos.Column) is DropDownCellEditor))
{
throw new InvalidOperationException("Cannot edit Cell as DropDownCellRenderer requires a DropDownColumn that uses a DropDownCellEditor");
}
rendererData.ButtonState = ComboBoxStates.Pressed;
if (!e.Table.IsEditing)
{
e.Table.EditCell(e.CellPos);
}
((IEditorUsesRendererButtons)e.Table.EditingCellEditor).OnEditorButtonMouseDown(this, e);
e.Table.Invalidate(e.CellRect);
}
}
}
}
/// <summary>
/// Gets the DropDownRendererData specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell">The Cell to get the DropDownRendererData data for</param>
/// <returns>The DropDownRendererData data for the specified Cell</returns>
protected DropDownRendererData GetDropDownRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (rendererData == null || !(rendererData is DropDownRendererData))
{
rendererData = new DropDownRendererData();
this.SetRendererData(cell, rendererData);
}
return((DropDownRendererData)rendererData);
}
/// <summary>
/// Raises the MouseUp event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseUp(CellMouseEventArgs e)
{
base.OnMouseUp(e);
if (this.ShowDropDownButton || (e.Table.IsEditing && e.CellPos == e.Table.EditingCell))
{
if (e.Table.IsCellEditable(e.CellPos))
{
// get the renderer data
DropDownRendererData rendererData = this.GetDropDownRendererData(e.Cell);
if (this.CalcDropDownButtonBounds().Contains(e.X, e.Y))
{
rendererData.ButtonState = ComboBoxStates.Hot;
e.Table.Invalidate(e.CellRect);
}
}
}
}
/// <summary>
/// Raises the MouseLeave event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseLeave(CellMouseEventArgs e)
{
base.OnMouseLeave(e);
if (this.ShowDropDownButton || (e.Table.IsEditing && e.CellPos == e.Table.EditingCell))
{
if (e.Table.IsCellEditable(e.CellPos))
{
// get the button renderer data
DropDownRendererData rendererData = this.GetDropDownRendererData(e.Cell);
if (rendererData.ButtonState != ComboBoxStates.Normal)
{
rendererData.ButtonState = ComboBoxStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
}
}
/// <summary>
/// Raises the MouseMove event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseMove(CellMouseEventArgs e)
{
base.OnMouseMove(e);
if (this.ShowDropDownButton || (e.Table.IsEditing && e.CellPos == e.Table.EditingCell))
{
if (e.Table.IsCellEditable(e.CellPos))
{
// get the button renderer data
DropDownRendererData rendererData = this.GetDropDownRendererData(e.Cell);
if (this.CalcDropDownButtonBounds().Contains(e.X, e.Y))
{
if (rendererData.ButtonState == ComboBoxStates.Normal)
{
if (e.Button == MouseButtons.Left && e.Row == e.Table.LastMouseDownCell.Row && e.Column == e.Table.LastMouseDownCell.Column)
{
rendererData.ButtonState = ComboBoxStates.Pressed;
}
else
{
rendererData.ButtonState = ComboBoxStates.Hot;
}
e.Table.Invalidate(e.CellRect);
}
}
else
{
if (rendererData.ButtonState != ComboBoxStates.Normal)
{
rendererData.ButtonState = ComboBoxStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
}
}
}
/// <summary>
/// Gets the DropDownRendererData specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell">The Cell to get the DropDownRendererData data for</param>
/// <returns>The DropDownRendererData data for the specified Cell</returns>
protected DropDownRendererData GetDropDownRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (rendererData == null || !(rendererData is DropDownRendererData))
{
rendererData = new DropDownRendererData();
this.SetRendererData(cell, rendererData);
}
return (DropDownRendererData) rendererData;
}