73 lines
2.4 KiB
C#
73 lines
2.4 KiB
C#
/*
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* Copyright (c) 2023 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Runtime.InteropServices;
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using System.Windows;
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using System.Windows.Interop;
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namespace SafeExamBrowser.UserInterface.Shared.Utilities
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{
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public static class WindowExtensions
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{
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private const int GWL_STYLE = -16;
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private const uint MF_BYCOMMAND = 0x00000000;
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private const uint MF_GRAYED = 0x00000001;
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private const uint MF_ENABLED = 0x00000000;
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private const uint SC_CLOSE = 0xF060;
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private const uint SWP_SHOWWINDOW = 0x0040;
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private const int WS_SYSMENU = 0x80000;
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private static readonly IntPtr HWND_BOTTOM = new IntPtr(1);
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public static void DisableCloseButton(this Window window)
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{
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var helper = new WindowInteropHelper(window);
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var systemMenu = GetSystemMenu(helper.Handle, false);
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if (systemMenu != IntPtr.Zero)
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{
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EnableMenuItem(systemMenu, SC_CLOSE, MF_BYCOMMAND | MF_GRAYED);
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}
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}
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public static void HideCloseButton(this Window window)
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{
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var helper = new WindowInteropHelper(window);
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var style = GetWindowLong(helper.Handle, GWL_STYLE) & ~WS_SYSMENU;
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SetWindowLong(helper.Handle, GWL_STYLE, style);
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}
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public static void MoveToBackground(this Window window)
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{
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var helper = new WindowInteropHelper(window);
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var x = (int) window.TransformFromPhysical(window.Left, 0).X;
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var y = (int) window.TransformFromPhysical(0, window.Top).Y;
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var width = (int) window.TransformFromPhysical(window.Width, 0).X;
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var height = (int) window.TransformFromPhysical(0, window.Height).Y;
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SetWindowPos(helper.Handle, HWND_BOTTOM, x, y, width, height, SWP_SHOWWINDOW);
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}
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[DllImport("user32.dll")]
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private static extern bool EnableMenuItem(IntPtr hMenu, uint uIDEnableItem, uint uEnable);
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[DllImport("user32.dll")]
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private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert);
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[DllImport("user32.dll")]
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private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
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[DllImport("user32.dll")]
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private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
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[DllImport("user32.dll")]
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private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
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}
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}
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