GridComboBoxCellRenderer ListBoxPart Size

[Tom]

Hi,

I have a derived cell from GridComboBoxCellModel and Renderer. How can I set the ListBoxPart size in the renderer. I didn't find a solution wich works. It seems a size change doesn't have any influence on the listbox at all.

Cheers,
Tom

PS: I am using a GGC

[haneefm]

Hi Tom,

You can override the OnShowingDropDown method and set e.Size to new size. And also you control the number of items displayed in the list by setting the DropDownRows property at some point in OnShowingDropoDown.

private void OnShowingDropDown(GridCurrentCellShowingDropDownEventArgs e)
{
e.Size = new Size(400,400);
((GridDropDownGridListControlPart) cr.ListControlPart).DropDownRows = 2;
}

Best regards,
Haneef

[Tom]

Hi Haneef,

I am not sure, but the GridComboBoxCellRenderer class doesn't have a OnShowingDropDown method.
Any ideas?

Cheers,
Tom

[haneefm]

Hi Tom,

Sorry for the inconvenience caused. You can override the OnShowDropDown method in derived GridComboBoxCellRenderer class. Below is a code snippet

public class MyComboBoxCellRenderer : GridComboBoxCellRenderer
{
public MyComboBoxCellRenderer(GridControlBase grid, GridCellModelBase cellModel): base(grid, cellModel)
{this.SupportsFocusControl = false; }

protected override void OnShowDropDown()
{
base.OnShowDropDown ();
this.ListBoxPart.Size = new Size(50,400); //Setting the Width
((GridComboBoxListBoxPart)this.ListBoxPart).DropDownRows = 4; //Setting the Height
}
}

Please try the attached sample and let me know if this helps.
ComboBox.zip

Best regards,
Haneef