added (wxMSW-only) wxToolTip::SetMaxWidth() and improve its default behaviour (#2817)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@58329 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/tooltip.h

@@ -37,10 +37,14 @@ public:
     static void Enable(bool flag);
         // set the delay after which the tooltip appears
     static void SetDelay(long milliseconds);
-        // set the delay after which the tooltip disappears or how long the tooltip remains visible
+        // set the delay after which the tooltip disappears or how long the
+        // tooltip remains visible
     static void SetAutoPop(long milliseconds);
         // set the delay between subsequent tooltips to appear
     static void SetReshow(long milliseconds);
+        // set maximum width for the new tooltips: -1 disables wrapping
+        // entirely, 0 restores the default behaviour
+    static void SetMaxWidth(int width);
 
     // implementation only from now on
     // -------------------------------
@@ -62,6 +66,9 @@ private:
     // create the tooltip ctrl if it doesn't exist yet and return its HWND
     static WXHWND GetToolTipCtrl();
 
+    // new tooltip maximum width, defaults to min(display width, 400)
+    static int ms_maxWidth;
+
     // remove this tooltip from the tooltip control
     void Remove();