C# ChoiceGroup.GetDisplayProperties方法代码示例

		protected ToolStripComboBox CreateComboBox(ChoiceGroup choice, bool wantsSeparatorBefore)
		{
			UIItemDisplayProperties display = choice.GetDisplayProperties();
			string label = display.Text;
			choice.PopulateNow();


			if (label == null)
				label = AdapterStrings.ErrorGeneratingLabel;

			if (!display.Visible)
				return null;


			label = label.Replace("_", "&");

			ToolStripComboBox combo = new ToolStripComboBox();
			combo.Text = label;


			//foreach(ChoiceBase s in choice)
			//{
			//    item.Items.Add(s.Label);
			//}
			//item.Tag = choice;
			choice.ReferenceWidget = combo;
			combo.Tag = choice;
			FillCombo(choice);
			combo.SelectedIndexChanged += new EventHandler(OnSelectedIndexChanged);
			combo.Enabled = display.Enabled;
			combo.Visible = display.Visible;


			return combo;
		}

		/// <summary>
		/// populate a combo box on the toolbar
		/// </summary>
		/// <param name="choice">The group that is the basis for this combo box.</param>
		private void FillCombo(ChoiceGroup choice)
		{
			UIItemDisplayProperties groupDisplay = choice.GetDisplayProperties();

			ToolStripComboBox combo = choice.ReferenceWidget as ToolStripComboBox;
			if (combo.Focused)
				return;//don't mess while we're in the combo

			// Disable if needed, but still show what's current, as for unicode fields where you can't change it, but you want to see what it is set to.
			combo.Enabled = groupDisplay.Enabled;

			ArrayList newItems = new ArrayList();
			bool fDifferent = false;
			var selectedItem = (ChoiceBase) null;
			foreach (ChoiceRelatedClass item in choice)
			{
				if (item is SeparatorChoice)
				{
					//TODO
				}
				else if (item is ChoiceBase)
				{
					newItems.Add(item);
					//if (groupDisplay.Checked)
					   // selectedItem = (ChoiceBase) item;

				  if (choice.SinglePropertyValue == (item as ListPropertyChoice).Value)
						selectedItem = (ChoiceBase) item;
					if (combo.Items.Count < newItems.Count || combo.Items[newItems.Count - 1] != item)
							fDifferent = true;

				}

			}

			// let it take the default
			// combo.AccessibleName = choice.Label;
			if (fDifferent || selectedItem != (combo.SelectedItem))
			{
				//combo.Click -= new EventHandler(OnComboClick);	//don't generate clicks (which end up being onpropertychanged() calls)
				combo.Items.Clear();
				combo.Items.AddRange(newItems.ToArray());

				combo.DropDownStyle = ComboBoxStyle.DropDownList;

				combo.SelectedItem = selectedItem;

				//combo.SuspendLayout = false;
			}

			////Set the ComboWidth of the combo box so that is is wide enough to show
			////the text of all items in the list.
			//int maxStringLength = 0;
			//for (int i = 0; i < combo.Items.Count; i++)
			//{
			//    if (combo.Items[i].ToString().Length > maxStringLength)
			//    {
			//        maxStringLength = combo.Items[i].ToString().Length;
			//    }
			//}
			//int factor = 6;
			//if (maxStringLength > 0 && combo.ComboWidth < maxStringLength * factor)
			//    combo.ComboWidth = maxStringLength * factor;
			//combo.Tooltip = combo.ToString();

		}

		/// <summary>
		/// populate a combo box on the toolbar
		/// </summary>
		/// <param name="group">The group that is the basis for this combo box.</param>
		private void FillCombo(ChoiceGroup group)
		{
			UIItemDisplayProperties groupDisplay = group.GetDisplayProperties();

			ComboBoxItem combo = group.ReferenceWidget as ComboBoxItem;
			if(combo.Focused)
				return;//don't mess while we're in the combo

			// Disable if needed, but still show what's current, as for unicode fields where you can't change it, but you want to see what it is set to.
			combo.Enabled = groupDisplay.Enabled;

			ArrayList newItems = new ArrayList();
			bool fDifferent = false;
			ComboItem selectedItem = null;
			foreach (ChoiceRelatedClass item in group)
			{
				if (item is SeparatorChoice)
				{
					//TODO
				}
				else if (item is ChoiceBase)
				{
					UIItemDisplayProperties display = ((ChoiceBase)item).GetDisplayProperties();
					ComboItem ci = CreateComboItem((ChoiceBase)item, display);
					if (ci != null)//will be null if item is supposed to be invisible now
					{
						newItems.Add(ci);
						if (display.Checked)
						{
							selectedItem = ci; //nb: if there should be more than one, only the last one will be selected
						}
						if (combo.Items.Count < newItems.Count || ((combo.Items[newItems.Count - 1]) as ComboItem).Tag != item)
							fDifferent = true;
					}
				}
			}

			combo.AccessibleName = group.Label;
			if (fDifferent || selectedItem.Tag != (combo.SelectedItem as ComboItem).Tag)
			{
				combo.SuspendLayout = true;
				combo.Click -= new EventHandler(OnComboClick);	//don't generate clicks (which end up being onpropertychanged() calls)
				combo.Items.Clear();
				combo.Items.AddRange(newItems.ToArray());
				combo.SelectedItem = selectedItem;
				combo.Click += new EventHandler(OnComboClick);
				combo.SuspendLayout = false;
			}

			//Set the ComboWidth of the combo box so that is is wide enough to show
			//the text of all items in the list.
			int maxStringLength = 0;
			for (int i = 0; i < combo.Items.Count; i++)
			{
				if (combo.Items[i].ToString().Length > maxStringLength)
				{
					maxStringLength = combo.Items[i].ToString().Length;
				}
			}
			int factor = 6;
			if (maxStringLength > 0 && combo.ComboWidth < maxStringLength * factor)
				combo.ComboWidth = maxStringLength * factor;
			combo.Tooltip = combo.ToString();

		}