gui_w32.c.diff

*** src/gui_w32.c	Sun Aug  4 23:15:37 2013
--- src/gui_w32.c.mod	Fri Nov 22 23:29:22 2013
***************
*** 4241,4246 ****
--- 4241,4274 ----
  # endif
  }
  
+ /*
+  * Get tabpage_T from POINT
+  */
+     static tabpage_T *
+ GetTabFromPoint(
+     HWND    hWnd,
+     POINT   pt)
+ {
+     tabpage_T *ptp = NULL;
+     if (gui_mch_showing_tabline())
+     {
+ 	TCHITTESTINFO htinfo;
+ 	htinfo.pt = pt;
+ 	/* ignore if a window under cusor is not tabcontrol. */
+ 	if (s_tabhwnd == hWnd)
+ 	{
+ 	    int idx = TabCtrl_HitTest(s_tabhwnd, &htinfo);
+ 	    if (idx != -1)
+ 		ptp = find_tabpage(idx + 1);
+ 	}
+     }
+     return ptp;
+ }
+ 
+ static tabpage_T    *s_tp = NULL;
+ static POINT	    s_pt = {0, 0};
+ static HCURSOR      s_hCursor = NULL;
+ 
      static LRESULT CALLBACK
  tabline_wndproc(
      HWND hwnd,
***************
*** 4249,4254 ****
--- 4277,4350 ----
      LPARAM lParam)
  {
      HandleMouseHide(uMsg, lParam);
+ 
+     POINT	pt;
+     tabpage_T	*tp;
+     RECT	rect;
+     int		nCenter;
+     int		idx0;
+     int		idx1;
+ 
+     switch (uMsg)
+     {
+ 	case WM_LBUTTONDOWN:
+ 	    {
+ 		s_pt.x = GET_X_LPARAM(lParam);
+ 		s_pt.y = GET_Y_LPARAM(lParam);
+ 		s_tp = GetTabFromPoint(hwnd, s_pt);
+ 		if (s_tp != NULL)
+ 		{
+ 		    SetCapture(hwnd);
+ 		    s_hCursor = GetCursor(); /* backup default cursor */
+ 		}
+ 		break;
+ 	    }
+ 	case WM_MOUSEMOVE:
+ 	    if (GetCapture() == hwnd
+ 		    && (0 != (wParam & MK_LBUTTON)))
+ 	    {
+ 		SetCursor(LoadCursor(NULL, IDC_SIZEWE));
+ 
+ 		pt.x = GET_X_LPARAM(lParam);
+ 		pt.y = s_pt.y;
+ 		if ( abs(pt.x - s_pt.x) > GetSystemMetrics(SM_CXDRAG) )
+ 		{
+ 		    tp = GetTabFromPoint(hwnd, pt);
+ 		    if (s_tp != NULL && tp != NULL
+ 			    && tp != s_tp) /* ignore if the same tabpage */
+ 		    {
+ 			idx0 = tabpage_index(s_tp) - 1;
+ 
+ 			idx1 = tabpage_index(tp) - 1;
+ 			TabCtrl_GetItemRect(hwnd, idx1, &rect);
+ 			nCenter = rect.left + (rect.right - rect.left) / 2;
+ 
+ 			/*    move rightward & over the center
+ 			   or move leftward  & over the center */
+ 			if (       ((idx0 < idx1) && (nCenter < pt.x))
+ 				|| ((idx1 < idx0) && (pt.x < nCenter)) )
+ 			{
+ 			    tabpage_move(idx1);
+ 			    update_screen(0);
+ 			}
+ 		    }
+ 		}
+ 	    }
+ 	    break;
+ 	case WM_LBUTTONUP:
+ 	    {
+ 		if (GetCapture() == hwnd)
+ 		{
+ 		    SetCursor(s_hCursor);
+ 		    ReleaseCapture();
+ 		    s_tp = NULL;
+ 		}
+ 		break;
+ 	    }
+ 	default:
+ 	    break;
+     }
+ 
      return CallWindowProc(s_tabline_wndproc, hwnd, uMsg, wParam, lParam);
  }
  #endif