Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / AxDesigner.cs / 1 / AxDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.Windows.Forms.Design { using Microsoft.Win32; using System; using System.Collections; using System.ComponentModel; using System.ComponentModel.Design; using System.Design; using System.Diagnostics; using System.Drawing; using System.IO; using System.Runtime.InteropServices; using System.Windows.Forms; using System.Windows.Forms.Design.Behavior; internal class AxDesigner : ControlDesigner { private WebBrowserBase webBrowserBase; private bool dragdropRevoked = false; private static TraceSwitch AxDesignerSwitch = new TraceSwitch("AxDesigner", "ActiveX Designer Trace"); private int SelectionStyle { get { // we don't implement GET return 0; } set { Debug.Fail("How did we get here?"); } } public override void Initialize(IComponent component) { base.Initialize(component); AutoResizeHandles = true; webBrowserBase = (WebBrowserBase)component; } public override void InitializeNewComponent(IDictionary defaultValues) { try { base.InitializeNewComponent(defaultValues); } catch { // The ControlDesigner tries to set the Text property of the control when // it creates the site. ActiveX controls generally don't like that, causing an // exception to be thrown. We now catch these exceptions in the AxDesigner // and continue on. } } protected override void PreFilterProperties(IDictionary properties) { object enabledProp = properties["Enabled"]; base.PreFilterProperties(properties); if (enabledProp != null) { properties["Enabled"] = enabledProp; } // Add a property to handle selection from ActiveX // properties["SelectionStyle"] = TypeDescriptor.CreateProperty(typeof(AxDesigner), "SelectionStyle", typeof(int), BrowsableAttribute.No, DesignerSerializationVisibilityAttribute.Hidden, DesignOnlyAttribute.Yes); } protected override void WndProc(ref Message m) { switch (m.Msg) { case NativeMethods.WM_PARENTNOTIFY: if ((int)m.WParam == NativeMethods.WM_CREATE) { HookChildHandles(m.LParam); } base.WndProc(ref m); break; case NativeMethods.WM_NCHITTEST: // ASURT 66102 The ShDocVw control registers itself as a drop-target even in design mode. // We take the first chance to unregister that, so we can perform our design-time behavior // irrespective of what the control wants to do. // // VSWhidbey 482533. The associated control might have child handles created // asynchronously, so we need to do this for all children. if (!dragdropRevoked) { IntPtr child = Control.Handle; dragdropRevoked = true; while(child != IntPtr.Zero && dragdropRevoked) { NativeMethods.RevokeDragDrop(child); child = NativeMethods.GetWindow(child, NativeMethods.GW_CHILD); } } // Some ActiveX controls return non-HTCLIENT return values for NC_HITTEST, which // causes the message to go to our parent. We want the control's designer to get // these messages so we change the result to HTCLIENT. // base.WndProc(ref m); if (((int)m.Result == NativeMethods.HTTRANSPARENT) || ((int)m.Result > NativeMethods.HTCLIENT)) { Debug.WriteLineIf(AxDesignerSwitch.TraceVerbose, "Converting NCHITTEST result from : " + (int)m.Result + " to HTCLIENT"); m.Result = (IntPtr)NativeMethods.HTCLIENT; } break; default: base.WndProc(ref m); break; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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