public void ShowImageList(Item[] items)
{
HideImageList();
this.comboBox.Items.AddRange(items);
using (Graphics g = CreateGraphics())
{
DetermineMaxItemSize(g, items, out this.itemSize, out this.maxImageSize);
}
this.comboBox.ItemHeight = this.itemSize.Height;
this.comboBox.DropDownWidth = this.itemSize.Width + SystemInformation.VerticalScrollBarWidth + UI.ScaleWidth(2);
// Determine the max drop down height so that we don't cover up the button
Screen ourScreen = Screen.FromControl(this);
Point screenLocation = PointToScreen(new Point(this.comboBox.Left, this.comboBox.Bottom));
int comboBoxToFloorHeight = ourScreen.WorkingArea.Height - screenLocation.Y;
// make sure it is an integral multiple of itemSize.Height
comboBoxToFloorHeight = this.itemSize.Height * (comboBoxToFloorHeight / this.itemSize.Height);
// add 2 pixels for border
comboBoxToFloorHeight += 2;
// But make sure it can hold at least 3 items
int minDropDownHeight = 2 + itemSize.Height * 3; // +2 for combobox's border
int dropDownHeight = Math.Max(comboBoxToFloorHeight, minDropDownHeight);
this.comboBox.DropDownHeight = dropDownHeight;
int selectedIndex = Array.FindIndex(
items,
delegate(Item item)
{
return(item.Selected);
});
this.comboBox.SelectedIndex = selectedIndex;
// Make sure the combobox does not spill past the right edge of the screen
int left = PointToScreen(new Point(0, Height)).X;
if (left + this.comboBox.DropDownWidth > ourScreen.WorkingArea.Right)
{
left = ourScreen.WorkingArea.Right - this.comboBox.DropDownWidth;
}
Point clientPt = PointToClient(new Point(left, screenLocation.Y));
SuspendLayout();
this.comboBox.Left = clientPt.X;
ResumeLayout(false);
// Set focus to it so it can get mouse wheel events, and then show it!
this.comboBox.Focus();
UI.ShowComboBox(this.comboBox, true);
}
public void HideImageList()
{
UI.ShowComboBox(this.comboBox, false);
}
