Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / DataGridViewColumnTypePicker.cs / 1 / DataGridViewColumnTypePicker.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms.Design { using System; using System.Design; using System.Windows.Forms; using System.ComponentModel; using System.ComponentModel.Design; using System.Collections; using System.Drawing; using System.Diagnostics; using System.Drawing.Design; [ ToolboxItem(false), DesignTimeVisible(false) ] internal class DataGridViewColumnTypePicker : ContainerControl { ListBox typesListBox; Type selectedType = null; private IWindowsFormsEditorService edSvc; // the current editor service that we need to close the drop down. private static Type dataGridViewColumnType = typeof(System.Windows.Forms.DataGridViewColumn); private const int MinimumHeight = 90; private const int MinimumWidth = 100; public DataGridViewColumnTypePicker() { typesListBox = new ListBox(); this.Size = typesListBox.Size; this.typesListBox.Dock = DockStyle.Fill; this.typesListBox.Sorted = true; this.typesListBox.HorizontalScrollbar = true; this.typesListBox.SelectedIndexChanged += new EventHandler(typesListBox_SelectedIndexChanged); this.Controls.Add(typesListBox); this.BackColor = SystemColors.Control; this.ActiveControl = typesListBox; } public Type SelectedType { get { return this.selectedType; } } private int PreferredWidth { get { int width = 0; Graphics g = this.typesListBox.CreateGraphics(); try { for (int i = 0; i < this.typesListBox.Items.Count; i ++) { ListBoxItem item = (ListBoxItem) this.typesListBox.Items[i]; width = Math.Max(width, System.Drawing.Size.Ceiling(g.MeasureString(item.ToString(), this.typesListBox.Font)).Width); } } finally { g.Dispose(); } return width; } } private void CloseDropDown() { if (edSvc != null) { edSvc.CloseDropDown(); } } /* protected override void OnVisibleChanged(EventArgs e) { base.OnVisibleChanged(e); if (Visible) { TreeNode selectedNode = treeView.SelectedNode; // ensure the selected node is visible // if (selectedNode != null) { treeView.SelectedNode = null; treeView.SelectedNode = selectedNode; } treeView.AfterExpand += new TreeViewEventHandler(treeView_AfterExpand); } } */ protected override void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified) { if ((BoundsSpecified.Width & specified) == BoundsSpecified.Width) { width = Math.Max(width, MinimumWidth); } if ((BoundsSpecified.Height & specified) == BoundsSpecified.Height) { height = Math.Max(height, MinimumHeight); } base.SetBoundsCore(x, y, width, height, specified); } ////// Setup the picker, and fill it with type information /// public void Start(IWindowsFormsEditorService edSvc, ITypeDiscoveryService discoveryService, Type defaultType) { this.edSvc = edSvc; this.typesListBox.Items.Clear(); ICollection columnTypes = DesignerUtils.FilterGenericTypes(discoveryService.GetTypes(dataGridViewColumnType, false /*excludeGlobalTypes*/)); foreach (Type t in columnTypes) { if (t == dataGridViewColumnType) { continue; } if (t.IsAbstract) { continue; } if (!t.IsPublic && !t.IsNestedPublic) { continue; } DataGridViewColumnDesignTimeVisibleAttribute attr = TypeDescriptor.GetAttributes(t)[typeof(DataGridViewColumnDesignTimeVisibleAttribute)] as DataGridViewColumnDesignTimeVisibleAttribute; if (attr != null && !attr.Visible) { continue; } this.typesListBox.Items.Add(new ListBoxItem(t)); } this.typesListBox.SelectedIndex = TypeToSelectedIndex(defaultType); this.selectedType = null; // set our default width. // this.Width = Math.Max(this.Width, this.PreferredWidth + (SystemInformation.VerticalScrollBarWidth * 2)); } private void typesListBox_SelectedIndexChanged(object sender, EventArgs e) { this.selectedType = ((ListBoxItem) this.typesListBox.SelectedItem).ColumnType; this.edSvc.CloseDropDown(); } private int TypeToSelectedIndex(Type type) { for (int i = 0; i < this.typesListBox.Items.Count; i ++) { if (type == ((ListBoxItem) this.typesListBox.Items[i]).ColumnType) { return i; } } Debug.Assert(false, "we should have found a type by now"); return -1; } private class ListBoxItem { Type columnType; public ListBoxItem(Type columnType) { this.columnType = columnType; } public override string ToString() { return this.columnType.Name; } public Type ColumnType { get { return this.columnType; } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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