/// <summary>
/// Specify the control to display in the drop-down
/// </summary>
/// <param name="control">control to display</param>
public void SetComponent(Control control)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
// create the drop-down holder, if necessary
if (_dropDownHolder == null)
{
_dropDownHolder = new DropDownHolder(this);
_dropDownHolder.Font = Font;
}
if (_dropDown != null)
{
_dropDown.KeyDown -= OnDropDownKeyDown;
_dropDown.Dispose();
}
_dropDown = control;
if (_dropDown != null)
{
// site the control, to allow it access to services from our container
control.Site = Site;
control.KeyDown += OnDropDownKeyDown;
_dropDownHolder.SetComponent(_dropDown, (_uiTypeEditor == null) ? Resizable : _uiTypeEditor.IsDropDownResizable);
}
}
public DropDownHolderAccessibleObject(DropDownHolder dropDownHolder) : base(dropDownHolder)
{
_owningDropDownHolder = dropDownHolder;
}
/// <summary>
/// Create the edit/drop-down controls when our handle is created.
/// </summary>
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
// create the edit box. done before creating the button because
// DockStyle.Right controls should be added first.
switch (_editControlStyle)
{
case TypeEditorHostEditControlStyle.Editable:
InitializeEdit();
break;
case TypeEditorHostEditControlStyle.ReadOnlyEdit:
InitializeEdit();
_edit.ReadOnly = true;
break;
case TypeEditorHostEditControlStyle.InstructionLabel:
InitializeInstructionLabel();
UpdateInstructionLabelText();
break;
}
// create the drop-down button
if (EditStyle != UITypeEditorEditStyle.None)
{
_button = new DropDownButton();
_button.Dock = DockStyle.Right;
_button.FlatStyle = FlatStyle.Flat;
_button.FlatAppearance.BorderSize = 0;
_button.FlatAppearance.MouseDownBackColor
= VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxButtonMouseDownBackgroundColorKey);
_button.FlatAppearance.MouseOverBackColor
= VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxButtonMouseOverBackgroundColorKey);
// only allow focus to go to the drop-down button if we don't have an edit control.
// if we have an edit control, we want this to act like a combo box, where only the edit control
// is focusable. If there's no edit control, though, we need to make sure the button can be
// focused, to prevent WinForms from forwarding focus somewhere else.
_button.TabStop = _edit == null;
if (_editStyle == UITypeEditorEditStyle.DropDown)
{
_button.Image = CreateArrowBitmap();
// set button name for accessibility purposes.
_button.AccessibleName = VirtualTreeStrings.GetString(VirtualTreeStrings.DropDownButtonAccessibleName);
}
else if (_editStyle == UITypeEditorEditStyle.Modal)
{
_button.Image = CreateDotDotDotBitmap();
// set button name for accessibility purposes.
_button.AccessibleName = VirtualTreeStrings.GetString(VirtualTreeStrings.BrowseButtonAccessibleName);
}
// Bug 17449 (Currituck). Use the system prescribed one, property grid uses this approach in
// ndp\fx\src\winforms\managed\system\winforms\propertygridinternal\propertygridview.cs
_button.Size = new Size(SystemInformation.VerticalScrollBarArrowHeight, Font.Height);
_button.BackColor = VSColorTheme.GetThemedColor(EnvironmentColors.ComboBoxBackgroundColorKey);
Controls.Add(_button);
_button.Click += OnDropDownButtonClick;
_button.LostFocus += OnContainedControlLostFocus;
}
// Create the drop down control container. Check for null here because this
// may have already been created via a call to SetComponent.
if (_dropDownHolder == null
&& EditStyle == UITypeEditorEditStyle.DropDown)
{
_dropDownHolder = new DropDownHolder(this);
_dropDownHolder.Font = Font;
}
}