Initial import of 2.7 Lite.

2026-09-22 08:50:15 +00:00 · 2010-09-07 17:34:51 +02:00
parent efef33c791
commit 3249f812d6
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+//========================================================================
+// GLFW - An OpenGL framework
+// Platform:    Win32/WGL
+// API version: 2.7
+// WWW:         http://www.glfw.org/
+//------------------------------------------------------------------------
+// Copyright (c) 2002-2006 Marcus Geelnard
+// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+
+#include "internal.h"
+
+
+//************************************************************************
+//****                  GLFW internal functions                       ****
+//************************************************************************
+
+//========================================================================
+// Low level keyboard hook (system callback) function
+// Used to disable system keys under Windows NT
+//========================================================================
+
+static LRESULT CALLBACK keyboardHook( int nCode, WPARAM wParam, LPARAM lParam )
+{
+    BOOL syskeys = FALSE;
+    PKBDLLHOOKSTRUCT p;
+
+    // We are only looking for keyboard events - interpret lParam as a
+    // pointer to a KBDLLHOOKSTRUCT
+    p = (PKBDLLHOOKSTRUCT) lParam;
+
+    if( nCode == HC_ACTION )
+    {
+        // We have a keyboard event
+
+        switch( wParam )
+        {
+            case WM_KEYDOWN:
+            case WM_SYSKEYDOWN:
+            case WM_KEYUP:
+            case WM_SYSKEYUP:
+                // Detect: ALT+TAB, ALT+ESC, ALT+F4, CTRL+ESC,
+                // LWIN, RWIN, APPS (mysterious menu key)
+                syskeys = ( p->vkCode == VK_TAB &&
+                            p->flags & LLKHF_ALTDOWN ) ||
+                          ( p->vkCode == VK_ESCAPE &&
+                            p->flags & LLKHF_ALTDOWN ) ||
+                          ( p->vkCode == VK_F4 &&
+                            p->flags & LLKHF_ALTDOWN ) ||
+                          ( p->vkCode == VK_ESCAPE &&
+                            (GetKeyState(VK_CONTROL) & 0x8000)) ||
+                          p->vkCode == VK_LWIN ||
+                          p->vkCode == VK_RWIN ||
+                          p->vkCode == VK_APPS;
+                break;
+
+            default:
+                break;
+        }
+    }
+
+    // Was it a system key combination (e.g. ALT+TAB)?
+    if( syskeys )
+    {
+        // Pass the key event to our window message loop
+        if( _glfwWin.opened )
+        {
+            PostMessage( _glfwWin.window, (UINT) wParam, p->vkCode, 0 );
+        }
+
+        // We've taken care of it - don't let the system know about this
+        // key event
+        return 1;
+    }
+    else
+    {
+        // It's a harmless key press, let the system deal with it
+        return CallNextHookEx( _glfwWin.keyboardHook, nCode, wParam, lParam );
+    }
+}
+
+
+
+//************************************************************************
+//****               Platform implementation functions                ****
+//************************************************************************
+
+//========================================================================
+// Enable system keys
+//========================================================================
+
+void _glfwPlatformEnableSystemKeys( void )
+{
+    BOOL dummy;
+
+    // Use different methods depending on operating system version
+    if( _glfwLibrary.Sys.winVer >= _GLFW_WIN_NT4 )
+    {
+        if( _glfwWin.keyboardHook != NULL )
+        {
+            UnhookWindowsHookEx( _glfwWin.keyboardHook );
+            _glfwWin.keyboardHook = NULL;
+        }
+    }
+    else
+    {
+        (void) SystemParametersInfo( SPI_SETSCREENSAVERRUNNING, FALSE, &dummy, 0 );
+    }
+}
+
+//========================================================================
+// Disable system keys
+//========================================================================
+
+void _glfwPlatformDisableSystemKeys( void )
+{
+    BOOL dummy;
+
+    // Use different methods depending on operating system version
+    if( _glfwLibrary.Sys.winVer >= _GLFW_WIN_NT4 )
+    {
+        // Under Windows NT, install a low level keyboard hook
+        _glfwWin.keyboardHook = SetWindowsHookEx( WH_KEYBOARD_LL,
+                                                  keyboardHook,
+                                                  _glfwLibrary.instance,
+                                                  0 );
+    }
+    else
+    {
+        // Under Windows 95/98/ME, fool Windows that a screensaver
+        // is running => prevents ALT+TAB, CTRL+ESC and CTRL+ALT+DEL
+        (void) SystemParametersInfo( SPI_SETSCREENSAVERRUNNING, TRUE, &dummy, 0 );
+    }
+}
+