Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / UserControlDocumentDesigner.cs / 1 / UserControlDocumentDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms.Design { using System.Collections; using System.ComponentModel; using System.Runtime.Serialization; using System.Diagnostics; using System; using System.Design; using System.ComponentModel.Design; using Microsoft.Win32; using System.Drawing; using System.Drawing.Design; using System.IO; using System.Windows.Forms; ////// /// [ ToolboxItemFilter("System.Windows.Forms.UserControl", ToolboxItemFilterType.Custom), ToolboxItemFilter("System.Windows.Forms.MainMenu", ToolboxItemFilterType.Prevent) ] internal class UserControlDocumentDesigner : DocumentDesigner { public UserControlDocumentDesigner() { AutoResizeHandles = true; } ///Provides a base implementation of a designer for user controls. ////// On user controls, size == client size. We do this so we can mess around /// with the non-client area of the user control when editing menus and not /// mess up the size property. /// private Size Size { get { return Control.ClientSize; } set { Control.ClientSize = value; } } internal override bool CanDropComponents(DragEventArgs de) { bool canDrop = base.CanDropComponents(de); if (canDrop) { // Figure out if any of the components in a main menu item. // We don't like main menus on UserControlDocumentDesigner. // OleDragDropHandler ddh = GetOleDragHandler(); object[] dragComps = ddh.GetDraggingObjects(de); if (dragComps != null) { IDesignerHost host = (IDesignerHost)GetService(typeof(IDesignerHost)); for (int i = 0; i < dragComps.Length; i++) { if (host == null || dragComps[i] == null || !(dragComps[i] is IComponent)) { continue; } if (dragComps[i] is MainMenu) return false; } } } return canDrop; } ////// /// Allows a designer to filter the set of properties /// the component it is designing will expose through the /// TypeDescriptor object. This method is called /// immediately before its corresponding "Post" method. /// If you are overriding this method you should call /// the base implementation before you perform your own /// filtering. /// protected override void PreFilterProperties(IDictionary properties) { PropertyDescriptor prop; base.PreFilterProperties(properties); // Handle shadowed properties // string[] shadowProps = new string[] { "Size" }; Attribute[] empty = new Attribute[0]; for (int i = 0; i < shadowProps.Length; i++) { prop = (PropertyDescriptor)properties[shadowProps[i]]; if (prop != null) { properties[shadowProps[i]] = TypeDescriptor.CreateProperty(typeof(UserControlDocumentDesigner), prop, empty); } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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