hw/xwin: Handle WM_MOUSEHWHEEL

Handle WM_MOUSEHWHEEL tilt wheel messages, similarly to WM_MOUSEWHEEL scroll
wheel messages, to generate X button 6 and 7 presses and releases.

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>

hw/xwin/win.h

@@ -42,6 +42,11 @@
 #define YES					1
 #endif
 
+/* We can handle WM_MOUSEHWHEEL even though _WIN32_WINNT < 0x0600 */
+#ifndef WM_MOUSEHWHEEL
+#define WM_MOUSEHWHEEL 0x020E
+#endif
+
 /* Turn debug messages on or off */
 #ifndef CYGDEBUG
 #define CYGDEBUG				NO
@@ -449,6 +454,7 @@ typedef struct _winPrivScreenRec {
     Bool fBadDepth;
 
     int iDeltaZ;
+    int iDeltaV;
 
     int iConnectedClients;
 
@@ -975,7 +981,7 @@ int
  winMouseProc(DeviceIntPtr pDeviceInt, int iState);
 
 int
- winMouseWheel(ScreenPtr pScreen, int iDeltaZ);
+ winMouseWheel(int *iTotalDeltaZ, int iDeltaZ, int iButtonUp, int iButtonDown);
 
 void
  winMouseButtonsSendEvent(int iEventType, int iButton);

hw/xwin/winmessages.h

@@ -529,7 +529,7 @@ static const char *MESSAGE_NAMES[1024] = {
     "WM_XBUTTONDOWN",
     "WM_XBUTTONUP",
     "WM_XBUTTONDBLCLK",
-    "526",
+    "WM_MOUSEHWHEEL",
     "527",
     "WM_PARENTNOTIFY",
     "WM_ENTERMENULOOP",

hw/xwin/winmouse.c

@@ -145,20 +145,16 @@ winMouseProc(DeviceIntPtr pDeviceInt, int iState)
 
 /* Handle the mouse wheel */
 int
-winMouseWheel(ScreenPtr pScreen, int iDeltaZ)
+winMouseWheel(int *iTotalDeltaZ, int iDeltaZ, int iButtonUp, int iButtonDown)
 {
-    winScreenPriv(pScreen);
-    int button;                 /* Button4 or Button5 */
-
-    /* Button4 = WheelUp */
-    /* Button5 = WheelDown */
+    int button;
 
     /* Do we have any previous delta stored? */
-    if ((pScreenPriv->iDeltaZ > 0 && iDeltaZ > 0)
-        || (pScreenPriv->iDeltaZ < 0 && iDeltaZ < 0)) {
+    if ((*iTotalDeltaZ > 0 && iDeltaZ > 0)
+        || (*iTotalDeltaZ < 0 && iDeltaZ < 0)) {
         /* Previous delta and of same sign as current delta */
-        iDeltaZ += pScreenPriv->iDeltaZ;
-        pScreenPriv->iDeltaZ = 0;
+        iDeltaZ += *iTotalDeltaZ;
+        *iTotalDeltaZ = 0;
     }
     else {
         /*
@@ -167,7 +163,7 @@ winMouseWheel(ScreenPtr pScreen, int iDeltaZ)
          * as blindly setting takes just as much time
          * as checking, then setting if necessary :)
          */
-        pScreenPriv->iDeltaZ = 0;
+        *iTotalDeltaZ = 0;
     }
 
     /*
@@ -175,7 +171,7 @@ winMouseWheel(ScreenPtr pScreen, int iDeltaZ)
      * WHEEL_DELTA
      */
     if (iDeltaZ >= WHEEL_DELTA || (-1 * iDeltaZ) >= WHEEL_DELTA) {
-        pScreenPriv->iDeltaZ = 0;
+        *iTotalDeltaZ = 0;
 
         /* Figure out how many whole deltas of the wheel we have */
         iDeltaZ /= WHEEL_DELTA;
@@ -186,16 +182,16 @@ winMouseWheel(ScreenPtr pScreen, int iDeltaZ)
          * we will store the wheel delta until the threshold
          * has been reached.
          */
-        pScreenPriv->iDeltaZ = iDeltaZ;
+        *iTotalDeltaZ = iDeltaZ;
         return 0;
     }
 
     /* Set the button to indicate up or down wheel delta */
     if (iDeltaZ > 0) {
-        button = Button4;
+        button = iButtonUp;
     }
     else {
-        button = Button5;
+        button = iButtonDown;
     }
 
     /*

hw/xwin/winmultiwindowwndproc.c

@@ -684,6 +684,18 @@ winTopLevelWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
         else
             break;
 
+    case WM_MOUSEHWHEEL:
+        if (SendMessage
+            (hwnd, WM_NCHITTEST, 0,
+             MAKELONG(GET_X_LPARAM(lParam),
+                      GET_Y_LPARAM(lParam))) == HTCLIENT) {
+            /* Pass the message to the root window */
+            SendMessage(hwndScreen, message, wParam, lParam);
+            return 0;
+        }
+        else
+            break;
+
     case WM_SETFOCUS:
         if (s_pScreenPriv == NULL || s_pScreenInfo->fIgnoreInput)
             break;

hw/xwin/winwin32rootlesswndproc.c

@@ -667,6 +667,15 @@ winMWExtWMWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
         SendMessage(hwndScreen, message, wParam, lParam);
         return 0;
 
+    case WM_MOUSEHWHEEL:
+#if CYGMULTIWINDOW_DEBUG
+        winDebug("winMWExtWMWindowProc - WM_MOUSEHWHEEL\n");
+#endif
+
+        /* Pass the message to the root window */
+        SendMessage(hwndScreen, message, wParam, lParam);
+        return 0;
+
     case WM_MOUSEACTIVATE:
 #if CYGMULTIWINDOW_DEBUG
         winDebug("winMWExtWMWindowProc - WM_MOUSEACTIVATE\n");

hw/xwin/winwndproc.c

@@ -976,7 +976,20 @@ winWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 #if CYGDEBUG
         winDebug("winWindowProc - WM_MOUSEWHEEL\n");
 #endif
-        winMouseWheel(s_pScreen, GET_WHEEL_DELTA_WPARAM(wParam));
+        /* Button4 = WheelUp */
+        /* Button5 = WheelDown */
+        winMouseWheel(&(s_pScreenPriv->iDeltaZ), GET_WHEEL_DELTA_WPARAM(wParam), Button4, Button5);
+        break;
+
+    case WM_MOUSEHWHEEL:
+        if (s_pScreenPriv == NULL || s_pScreenInfo->fIgnoreInput)
+            break;
+#if CYGDEBUG
+        winDebug("winWindowProc - WM_MOUSEHWHEEL\n");
+#endif
+        /* Button7 = TiltRight */
+        /* Button6 = TiltLeft */
+        winMouseWheel(&(s_pScreenPriv->iDeltaV), GET_WHEEL_DELTA_WPARAM(wParam), 7, 6);
         break;
 
     case WM_SETFOCUS:
@@ -1147,6 +1160,7 @@ winWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 
         /* Clear any lingering wheel delta */
         s_pScreenPriv->iDeltaZ = 0;
+        s_pScreenPriv->iDeltaV = 0;
 
         /* Reshow the Windows mouse cursor if we are being deactivated */
         if (g_fSoftwareCursor && LOWORD(wParam) == WA_INACTIVE && !g_fCursor) {