Colin Watson suggests that Alt-click (or Option-click) could

[sgt/puzzles] / windows.c

diff --git a/windows.c b/windows.c
index 430fff0..be1f17c 100644 (file)
--- a/windows.c
+++ b/windows.c
@@ -1107,6 +1107,19 @@ static void new_game_type(frontend *fe)
     midend_redraw(fe->me);
 }
 
+static int is_alt_pressed(void)
+{
+    BYTE keystate[256];
+    int r = GetKeyboardState(keystate);
+    if (!r)
+       return FALSE;
+    if (keystate[VK_MENU] & 0x80)
+       return TRUE;
+    if (keystate[VK_RMENU] & 0x80)
+       return TRUE;
+    return FALSE;
+}
+
 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
                                WPARAM wParam, LPARAM lParam)
 {
@@ -1316,10 +1329,10 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
             */
            if (message == WM_MBUTTONDOWN || (wParam & MK_SHIFT))
                button = MIDDLE_BUTTON;
-           else if (message == WM_LBUTTONDOWN)
-               button = LEFT_BUTTON;
-           else
+           else if (message == WM_RBUTTONDOWN || is_alt_pressed())
                button = RIGHT_BUTTON;
+           else
+               button = LEFT_BUTTON;
 
            if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
                                    (signed short)HIWORD(lParam), button))
@@ -1341,10 +1354,10 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
             */
            if (message == WM_MBUTTONUP || (wParam & MK_SHIFT))
                button = MIDDLE_RELEASE;
-           else if (message == WM_LBUTTONUP)
-               button = LEFT_RELEASE;
-           else
+           else if (message == WM_RBUTTONUP || is_alt_pressed())
                button = RIGHT_RELEASE;
+           else
+               button = LEFT_RELEASE;
 
            if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
                                    (signed short)HIWORD(lParam), button))
@@ -1359,10 +1372,10 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
 
            if (wParam & (MK_MBUTTON | MK_SHIFT))
                button = MIDDLE_DRAG;
-           else if (wParam & MK_LBUTTON)
-               button = LEFT_DRAG;
-           else
+           else if (wParam & MK_RBUTTON || is_alt_pressed())
                button = RIGHT_DRAG;
+           else
+               button = LEFT_DRAG;
            
            if (!midend_process_key(fe->me, (signed short)LOWORD(lParam),
                                    (signed short)HIWORD(lParam), button))