public void DropDown(Control control, DropDownDirection direction)
{
if (control != null)
{
Point pt;
switch (direction)
{
case DropDownDirection.Left:
pt = new Point(-this.Width, 0);
break;
case DropDownDirection.Right:
pt = new Point(control.Width, 0);
break;
case DropDownDirection.AboveRight:
pt = new Point(control.Width, -this.Height);
break;
case DropDownDirection.AboveLeft:
pt = new Point(-this.Width, -this.Height);
break;
case DropDownDirection.BelowRight:
pt = new Point(control.Width - this.Width, control.Height);
break;
case DropDownDirection.BelowLeft:
pt = new Point(-this.Width, control.Height);
break;
case DropDownDirection.Above:
pt = new Point(0, -this.Height);
break;
case DropDownDirection.Below:
default:
pt = new Point(0, control.Height);
break;
}
DropDown(control, pt);
}
else
{
throw new ArgumentNullException("control");
}
}
public DropDown(
Func <Widget> selectBuilder = null,
IEnumerable <T> items = null,
Func <DropDownState, T, Widget> itemBuilder = null,
Color overlayColor = null,
Border overlayBorder = null,
DropDownDirection direction = DropDownDirection.bottom,
DropDownOverlayType overlayType = DropDownOverlayType.scrollable
)
{
_selectBuilder = selectBuilder;
_items = items;
_itemBuilder = itemBuilder;
_overlayColor = overlayColor;
_direction = direction;
_overlayBorder = overlayBorder;
_overlayType = overlayType;
}
public void ShowDropDown()
{
this.multiLineComboBox._RaiseDropDown(new EventArgs());
Application.AddMessageFilter(this.filter);
Point p = new Point(0, this.multiLineComboBox.Height);
p = this.multiLineComboBox.PointToScreen(p);
if (((p.Y + base.Height) > Screen.GetBounds(this).Height) && (p.Y > ((Screen.GetBounds(this).Height + this.multiLineComboBox.Height) / 2)))
{
this.dropDownDir = DropDownDirection.upward;
p.Offset(0, -this.multiLineComboBox.Height);
}
else
{
this.dropDownDir = DropDownDirection.downward;
}
if ((base.Width < Screen.GetBounds(this).Width) && ((p.X + base.Width) > Screen.PrimaryScreen.WorkingArea.Width))
{
p.X = Screen.GetBounds(this).Width - base.Width;
}
if ((p.X < 0) && (base.Width <= Screen.GetBounds(this).Width))
{
p.X = 0;
}
this.dropDownListBox.Height = this.CalcDropDownHeight() + 2;
this.dropDownOrigin = p;
if (ExAppearanceManager.GetAppearanceManager().DoSlideOpenComboBox() && (this.multiLineComboBox.SlidingDropDown == MultiLineComboBoxEffect.Standard))
{
dropDownAnimFrameNum = 10;
}
else
{
dropDownAnimFrameNum = 1;
}
this.dropDownAnimTimer.Interval = dropDownAnimOpenTime / dropDownAnimFrameNum;
this.DropDownAnimation();
base.Visible = true;
this.dropDownListBox.Height = this.CalcDropDownHeight() + 2;
this.dropDownAnimCount = 0;
this.DropDownAnimation();
}