Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / MDIControlStrip.cs / 1 / MDIControlStrip.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.Security; using System.ComponentModel; using System.Drawing; using System.Windows.Forms; using System.Diagnostics; using System.Runtime.InteropServices; ///this is the toolstrip used for merging the [:)] [_][#][X] buttons onto an /// mdi parent when an MDI child is maximized. /// internal class MdiControlStrip : MenuStrip { private ToolStripMenuItem system; private ToolStripMenuItem close; private ToolStripMenuItem minimize; private ToolStripMenuItem restore; private MenuStrip mergedMenu; private IWin32Window target; ///target is ideally the MDI Child to send the system commands to. /// although there's nothing MDI child specific to it... you could have this /// a toplevel window. /// public MdiControlStrip(IWin32Window target) { IntPtr hMenu= UnsafeNativeMethods.GetSystemMenu(new HandleRef(this, Control.GetSafeHandle(target)), /*bRevert=*/false); this.target = target; // The menu item itself takes care of enabledness and sending WM_SYSCOMMAND messages to the target. minimize = new ControlBoxMenuItem(hMenu, NativeMethods.SC_MINIMIZE, target); close = new ControlBoxMenuItem(hMenu, NativeMethods.SC_CLOSE, target); restore = new ControlBoxMenuItem(hMenu, NativeMethods.SC_RESTORE, target); // The dropDown of the system menu is the one that talks to native. system = new SystemMenuItem(); // However in the event that the target handle changes we have to push the new handle into everyone. Control controlTarget = target as Control; if (controlTarget != null) { controlTarget.HandleCreated += new EventHandler(OnTargetWindowHandleRecreated); controlTarget.Disposed += new EventHandler(OnTargetWindowDisposed); } // add in opposite order to how you want it merged this.Items.AddRange(new ToolStripItem[] { minimize, restore,close, system }); this.SuspendLayout(); foreach (ToolStripItem item in this.Items) { item.DisplayStyle = ToolStripItemDisplayStyle.Image; item.MergeIndex = 0; item.MergeAction = MergeAction.Insert; item.Overflow = ToolStripItemOverflow.Never; item.Alignment = ToolStripItemAlignment.Right; item.Padding = Padding.Empty; } // set up the sytem menu system.Image = GetTargetWindowIcon(); system.Alignment = ToolStripItemAlignment.Left; system.DropDownOpening += new EventHandler(OnSystemMenuDropDownOpening); system.ImageScaling = ToolStripItemImageScaling.None; system.DoubleClickEnabled = true; system.DoubleClick += new EventHandler(OnSystemMenuDoubleClick); system.Padding = Padding.Empty; system.ShortcutKeys = Keys.Alt | Keys.OemMinus; this.ResumeLayout(false); } #region Buttons /* Unused public ToolStripMenuItem System { get { return system; } } */ public ToolStripMenuItem Close { get { return close; } } /* Unused public ToolStripMenuItem Minimize { get { return minimize; } } public ToolStripMenuItem Restore { get { return restore; } } */ #endregion internal MenuStrip MergedMenu { get { return mergedMenu; } set { mergedMenu = value; } } /* PERF: consider shutting off layout #region ShutOffLayout protected override void OnLayout(LayoutEventArgs e) { return; // if someone attempts } protected override Size GetPreferredSize(Size proposedSize) { return Size.Empty; } #endregion */ [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2106:SecureAsserts")] private Image GetTargetWindowIcon() { Image systemIcon = null; IntPtr hIcon = UnsafeNativeMethods.SendMessage(new HandleRef(this, Control.GetSafeHandle(target)), NativeMethods.WM_GETICON, NativeMethods.ICON_SMALL, 0); IntSecurity.ObjectFromWin32Handle.Assert(); try { Icon icon = (hIcon != IntPtr.Zero) ? Icon.FromHandle(hIcon) : Form.DefaultIcon; Icon smallIcon = new Icon(icon, SystemInformation.SmallIconSize); systemIcon = smallIcon.ToBitmap(); smallIcon.Dispose(); } finally { CodeAccessPermission.RevertAssert(); } return systemIcon; } protected internal override void OnItemAdded(ToolStripItemEventArgs e) { base.OnItemAdded(e); Debug.Assert(Items.Count <= 4, "Too many items in the MDIControlStrip. How did we get into this situation?"); } private void OnTargetWindowDisposed(object sender, EventArgs e) { UnhookTarget(); target = null; } private void OnTargetWindowHandleRecreated(object sender, EventArgs e) { // in the case that the handle for the form is recreated we need to set // up the handles to point to the new window handle for the form. system.SetNativeTargetWindow(target); minimize.SetNativeTargetWindow(target); close.SetNativeTargetWindow(target); restore.SetNativeTargetWindow(target); IntPtr hMenu= UnsafeNativeMethods.GetSystemMenu(new HandleRef(this, Control.GetSafeHandle(target)), /*bRevert=*/false); system.SetNativeTargetMenu(hMenu); minimize.SetNativeTargetMenu(hMenu); close.SetNativeTargetMenu(hMenu); restore.SetNativeTargetMenu(hMenu); // clear off the System DropDown. if (system.HasDropDownItems) { // next time we need one we'll just fetch it fresh. system.DropDown.Items.Clear(); system.DropDown.Dispose(); } system.Image = GetTargetWindowIcon(); } private void OnSystemMenuDropDownOpening(object sender, EventArgs e) { if (!system.HasDropDownItems && (target != null)) { system.DropDown = ToolStripDropDownMenu.FromHMenu(UnsafeNativeMethods.GetSystemMenu(new HandleRef(this, Control.GetSafeHandle(target)), /*bRevert=*/false), target); } else if (MergedMenu == null) { system.DropDown.Dispose(); } } private void OnSystemMenuDoubleClick(object sender, EventArgs e) { Close.PerformClick(); } protected override void Dispose(bool disposing) { if (disposing) { UnhookTarget(); target = null; } base.Dispose(disposing); } private void UnhookTarget() { if (target != null) { Control controlTarget = target as Control; if (controlTarget != null) { controlTarget.HandleCreated -= new EventHandler(OnTargetWindowHandleRecreated); controlTarget.Disposed -= new EventHandler(OnTargetWindowDisposed); } target = null; } } // when the system menu item shortcut is evaluated - pop the dropdown internal class ControlBoxMenuItem : ToolStripMenuItem { internal ControlBoxMenuItem(IntPtr hMenu, int nativeMenuCommandId, IWin32Window targetWindow) : base(hMenu, nativeMenuCommandId, targetWindow) { } internal override bool CanKeyboardSelect { get { return false; } } } // when the system menu item shortcut is evaluated - pop the dropdown internal class SystemMenuItem : ToolStripMenuItem { public SystemMenuItem(){ } protected internal override bool ProcessCmdKey(ref Message m, Keys keyData) { if (Visible && ShortcutKeys == keyData) { ShowDropDown(); this.DropDown.SelectNextToolStripItem(null, true); return true; } return base.ProcessCmdKey(ref m, keyData); } protected override void OnOwnerChanged(EventArgs e) { if (HasDropDownItems && DropDown.Visible) { HideDropDown(); } base.OnOwnerChanged(e); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- CodeDOMUtility.cs
- MetadataPropertyCollection.cs
- WindowsBrush.cs
- HttpCacheVaryByContentEncodings.cs
- ListManagerBindingsCollection.cs
- NumberFormatter.cs
- CaseInsensitiveOrdinalStringComparer.cs
- NavigationService.cs
- ToolStripContentPanel.cs
- CollectionViewProxy.cs
- DataControlPagerLinkButton.cs
- CompositeControl.cs
- path.cs
- DeviceFiltersSection.cs
- SqlDataReaderSmi.cs
- BamlBinaryWriter.cs
- Property.cs
- dataSvcMapFileLoader.cs
- rsa.cs
- SaveFileDialog.cs
- SystemFonts.cs
- StringFormat.cs
- SqlDataSourceFilteringEventArgs.cs
- FormClosedEvent.cs
- CollectionBuilder.cs
- ListenerAdaptersInstallComponent.cs
- GeometryDrawing.cs
- ArraySegment.cs
- COM2PropertyDescriptor.cs
- GridViewCommandEventArgs.cs
- HttpCachePolicyWrapper.cs
- SequentialOutput.cs
- RequestCacheEntry.cs
- Html32TextWriter.cs
- Compiler.cs
- TextContainerChangeEventArgs.cs
- CodeSnippetExpression.cs
- NotifyCollectionChangedEventArgs.cs
- Content.cs
- GridViewRowEventArgs.cs
- ModuleElement.cs
- ToolTip.cs
- PixelFormats.cs
- EtwTrace.cs
- PerformanceCounterPermissionEntry.cs
- ResourcesBuildProvider.cs
- UpdateManifestForBrowserApplication.cs
- UIAgentAsyncParams.cs
- TemplateLookupAction.cs
- InvalidWMPVersionException.cs
- GridViewPageEventArgs.cs
- InputBindingCollection.cs
- TagMapInfo.cs
- RadioButtonStandardAdapter.cs
- _UncName.cs
- ToolStripDropDownMenu.cs
- ResourceWriter.cs
- EnumType.cs
- PersonalizableTypeEntry.cs
- cryptoapiTransform.cs
- DeviceContexts.cs
- XsdDuration.cs
- assertwrapper.cs
- NotifyInputEventArgs.cs
- Filter.cs
- InOutArgumentConverter.cs
- XmlDsigSep2000.cs
- MissingMemberException.cs
- XmlDataLoader.cs
- StorageInfo.cs
- TableAutomationPeer.cs
- CopyCodeAction.cs
- PartialTrustVisibleAssembliesSection.cs
- RightsManagementPermission.cs
- PropertyValueChangedEvent.cs
- ConfigXmlElement.cs
- UnconditionalPolicy.cs
- ChildrenQuery.cs
- StylusButtonCollection.cs
- ErasingStroke.cs
- Button.cs
- ApplicationCommands.cs
- FontFaceLayoutInfo.cs
- SizeF.cs
- CmsInterop.cs
- SystemIPInterfaceStatistics.cs
- MarkupCompilePass2.cs
- Transform3DCollection.cs
- MouseBinding.cs
- FreezableOperations.cs
- wmiprovider.cs
- XmlValueConverter.cs
- GetWinFXPath.cs
- CannotUnloadAppDomainException.cs
- UnmanagedBitmapWrapper.cs
- XmlEntity.cs
- KeyGestureValueSerializer.cs
- NativeWindow.cs
- LogSwitch.cs
- ModelPropertyCollectionImpl.cs