Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / MdiWindowListStrip.cs / 1 / MdiWindowListStrip.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Windows.Forms { using System; using System.ComponentModel; using System.Drawing; using System.Windows.Forms; using System.Diagnostics; using System.Runtime.InteropServices; using System.Security; using System.Globalization; ///this is the menu that merges into the MdiWindowListItem /// in an MDI parent when an MDI child is maximized. /// internal class MdiWindowListStrip : MenuStrip { private Form mdiParent = null; private ToolStripMenuItem mergeItem; private MenuStrip mergedMenu; public MdiWindowListStrip() { } protected override void Dispose(bool disposing) { if (disposing) { mdiParent = null; } base.Dispose(disposing); } internal ToolStripMenuItem MergeItem { get { if (mergeItem == null) { mergeItem = new ToolStripMenuItem(); mergeItem.MergeAction = MergeAction.MatchOnly; } if (mergeItem.Owner == null) { this.Items.Add(mergeItem); } return mergeItem; } } internal MenuStrip MergedMenu { get { return mergedMenu; } set { mergedMenu = value; } } ///Given a form, the items on this toolstrip populate with the mdi children /// with mnemonics 1-9 and More Windows menu item. /// These items can then be merged into a menustrip. /// /// Based on similar code in MenuItem.cs::PopulateMdiList(), which is unfortunately just different /// enough in its working environment that we can't readily combine the two. /// But if you're fixing something here, chances are that the same issue will need scrutiny over there. /// public void PopulateItems(Form mdiParent, ToolStripMenuItem mdiMergeItem, bool includeSeparator) { this.mdiParent = mdiParent; this.SuspendLayout(); MergeItem.DropDown.SuspendLayout(); try { ToolStripMenuItem mergeItem = MergeItem; mergeItem.DropDownItems.Clear(); mergeItem.Text = mdiMergeItem.Text; Form[] forms = mdiParent.MdiChildren; if(forms != null && forms.Length != 0){ if(includeSeparator) { ToolStripSeparator separator = new ToolStripSeparator(); separator.MergeAction = MergeAction.Append; separator.MergeIndex = -1; mergeItem.DropDownItems.Add(separator); } Form activeMdiChild = mdiParent.ActiveMdiChild; const int maxMenuForms = 9; // max number of Window menu items for forms int visibleChildren = 0; // number of visible child forms (so we know if we need to show More Windows... int accel = 1; // prefix the form name with this digit, underlined, as an accelerator int formsAddedToMenu = 0; bool activeFormAdded = false; for (int i = 0; i < forms.Length; i++) { // we need to check close reason here because we could be getting called // here in the midst of a WM_CLOSE - WM_MDIDESTROY eventually fires a WM_MDIACTIVATE if (forms[i].Visible && (forms[i].CloseReason == CloseReason.None)) { visibleChildren++; if ((activeFormAdded && (formsAddedToMenu < maxMenuForms)) || // don't exceed max (!activeFormAdded && (formsAddedToMenu < (maxMenuForms-1)) || // save room for active if it's not in yet (forms[i].Equals(activeMdiChild)))){ // there's always room for activeMdiChild string text = WindowsFormsUtils.EscapeTextWithAmpersands(mdiParent.MdiChildren[i].Text); text = (text == null) ? String.Empty : text; ToolStripMenuItem windowListItem = new ToolStripMenuItem(mdiParent.MdiChildren[i]); windowListItem.Text = String.Format(CultureInfo.CurrentCulture, "&{0} {1}", accel, text); windowListItem.MergeAction = MergeAction.Append; windowListItem.MergeIndex = accel; windowListItem.Click += new EventHandler(OnWindowListItemClick); if (forms[i].Equals(activeMdiChild)) { // if this the active one, check it off. windowListItem.Checked = true; activeFormAdded = true; } accel++; formsAddedToMenu++; Debug.WriteLineIf(ToolStrip.MDIMergeDebug.TraceVerbose,"\tPopulateItems: Added " + windowListItem.Text); mergeItem.DropDownItems.Add(windowListItem); } } } // show the More Windows... item if necessary. if (visibleChildren > maxMenuForms) { ToolStripMenuItem moreWindowsMenuItem = new ToolStripMenuItem(); moreWindowsMenuItem.Text = SR.GetString(SR.MDIMenuMoreWindows); Debug.WriteLineIf(ToolStrip.MDIMergeDebug.TraceVerbose, "\tPopulateItems: Added " + moreWindowsMenuItem.Text); moreWindowsMenuItem.Click += new EventHandler(OnMoreWindowsMenuItemClick); moreWindowsMenuItem.MergeAction = MergeAction.Append; mergeItem.DropDownItems.Add(moreWindowsMenuItem); } } } finally { // this is an invisible toolstrip dont even bother doing layout. this.ResumeLayout(false); MergeItem.DropDown.ResumeLayout(false); } } ///handler for More Windows... This is similar to MenuItem.cs private void OnMoreWindowsMenuItemClick(object sender, EventArgs e) { Form[] forms = mdiParent.MdiChildren; if (forms != null) { // SECREVIEW : "System" style dialog, no user code will execute, and // : we don't want the restricted dialog options... // IntSecurity.AllWindows.Assert(); try { using (MdiWindowDialog dialog = new MdiWindowDialog()) { dialog.SetItems(mdiParent.ActiveMdiChild, forms); DialogResult result = dialog.ShowDialog(); if (result == DialogResult.OK) { // AllWindows Assert above allows this... // dialog.ActiveChildForm.Activate(); if (dialog.ActiveChildForm.ActiveControl != null && !dialog.ActiveChildForm.ActiveControl.Focused) { dialog.ActiveChildForm.ActiveControl.Focus(); } } } } finally { CodeAccessPermission.RevertAssert(); } } } ///handler for 1 - 9. This is similar to MenuItem.cs private void OnWindowListItemClick(object sender, EventArgs e) { ToolStripMenuItem windowListItem = sender as ToolStripMenuItem; if (windowListItem != null) { Form boundForm = windowListItem.MdiForm; if (boundForm != null) { // SECREVIEW : User selected a window, that means it is OK // : to move focus // IntSecurity.ModifyFocus.Assert(); try { boundForm.Activate(); if (boundForm.ActiveControl != null && !boundForm.ActiveControl.Focused) { boundForm.ActiveControl.Focus(); } } finally { CodeAccessPermission.RevertAssert(); } } } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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