handle the back soft key on Windows mobile SmartPhones

We must tell the system that we want to intercept the back key on
Windows mobile. Each toplevel widget that needs correct back key
behaviour needs to have a menu bar. Why? Ask Microsoft...

Task-number: 248846
Reviewed-by: thartman

1 files changed, 15 insertions, 0 deletions

diff --git a/src/gui/kernel/qapplication_win.cpp b/src/gui/kernel/qapplication_win.cpp
index 065e7ff..f14ad6f 100644
--- a/src/gui/kernel/qapplication_win.cpp
+++ b/src/gui/kernel/qapplication_win.cpp
@@ -1725,6 +1725,21 @@ LRESULT CALLBACK QtWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam
             // fall-through intended
         case WM_KEYUP:
         case WM_SYSKEYUP:
+#if Q_OS_WINCE_WM
+        case WM_HOTKEY:
+            if(HIWORD(msg.lParam) == VK_TBACK) {
+                const bool hotKeyDown = !(LOWORD(msg.lParam) & MOD_KEYUP);
+                msg.lParam = 0x69 << 16;
+                msg.wParam = VK_BACK;
+                if (hotKeyDown) {
+                    msg.message = WM_KEYDOWN;
+                    qt_keymapper_private()->updateKeyMap(msg);
+                } else {
+                    msg.message = WM_KEYUP;
+                }
+            }
+            // fall-through intended
+#endif
         case WM_IME_CHAR:
         case WM_IME_KEYDOWN:
         case WM_CHAR: {