System.Windows.Forms.MdiClient.SetWindowStates C# (CSharp) Method

		internal bool SetWindowStates (MdiWindowManager wm)
		{
		/*
			MDI WindowState behaviour:
			- If the active window is maximized, all other maximized windows are normalized.
			- If a normal window gets focus and the original active window was maximized, 
			  the normal window gets maximized and the original window gets normalized.
			- If a minimized window gets focus and the original window was maximized, 
			  the minimzed window gets maximized and the original window gets normalized. 
			  If the ex-minimized window gets deactivated, it will be normalized.
		*/
			Form form = wm.form;

			if (setting_windowstates) {
				return false;
			}
			
			if (!form.Visible)
				return false;
			
			bool is_active = wm.IsActive;
			bool maximize_this = false;
			
			if (!is_active){
				return false;
			}
			
			ArrayList minimize_these = new ArrayList ();
			ArrayList normalize_these = new ArrayList ();

			setting_windowstates = true;
			foreach (Form frm in mdi_child_list) {
				if (frm == form) {
					continue;
				} else if (!frm.Visible){
					continue;
				}
				if (frm.WindowState == FormWindowState.Maximized && is_active) {
					maximize_this = true;	
					if (((MdiWindowManager) frm.window_manager).was_minimized) {
						minimize_these.Add (frm); 
					} else {
						normalize_these.Add (frm); 
					}
				}
			}

			if (maximize_this && form.WindowState != FormWindowState.Maximized) {
				wm.was_minimized = form.window_state == FormWindowState.Minimized;
				form.WindowState = FormWindowState.Maximized;
			}
			
			foreach (Form frm in minimize_these)
				frm.WindowState = FormWindowState.Minimized;

			foreach (Form frm in normalize_these)
				frm.WindowState = FormWindowState.Normal;


			SetParentText (false);
			
			XplatUI.RequestNCRecalc (ParentForm.Handle);
			XplatUI.RequestNCRecalc (Handle);

			SizeScrollBars ();

			setting_windowstates = false;

			if (form.MdiParent.MainMenuStrip != null)
				form.MdiParent.MainMenuStrip.RefreshMdiItems ();

			// Implicit menu strip merging
			// - When child is activated
			// - Parent form must have a MainMenuStrip
			// - Find the first menustrip on the child
			// - Merge
			MenuStrip parent_menu = form.MdiParent.MainMenuStrip;

			if (parent_menu != null) {
				if (parent_menu.IsCurrentlyMerged)
					ToolStripManager.RevertMerge (parent_menu);
					
				MenuStrip child_menu = LookForChildMenu (form);

				if (form.WindowState != FormWindowState.Maximized)
					RemoveControlMenuItems (wm);
				
				if (form.WindowState == FormWindowState.Maximized) {
					bool found = false;
					
					foreach (ToolStripItem tsi in parent_menu.Items) {
						if (tsi is MdiControlStrip.SystemMenuItem) {
							(tsi as MdiControlStrip.SystemMenuItem).MdiForm = form;
							found = true;
						} else if (tsi is MdiControlStrip.ControlBoxMenuItem) {
							(tsi as MdiControlStrip.ControlBoxMenuItem).MdiForm = form;
							found = true;
						}
					}	
					
					if (!found) {
						parent_menu.SuspendLayout ();
						parent_menu.Items.Insert (0, new MdiControlStrip.SystemMenuItem (form));
						parent_menu.Items.Add (new MdiControlStrip.ControlBoxMenuItem (form, MdiControlStrip.ControlBoxType.Close));
						parent_menu.Items.Add (new MdiControlStrip.ControlBoxMenuItem (form, MdiControlStrip.ControlBoxType.Max));
						parent_menu.Items.Add (new MdiControlStrip.ControlBoxMenuItem (form, MdiControlStrip.ControlBoxType.Min));
						parent_menu.ResumeLayout ();
					}
				}
				
				if (child_menu != null)
					ToolStripManager.Merge (child_menu, parent_menu);
			}

			return maximize_this;
		}