Added AddGrab, RemoveGrab, IsGrabbed to wxTopLevelWindowGTK

and AddGrabIfNeeded to wxHtmlHelpController, to assist with
showing the help window from a modal dialog.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15880 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/html/helpctrl.h

@@ -36,26 +36,13 @@ public:
     void SetTitleFormat(const wxString& format);
     void SetTempDir(const wxString& path) { m_helpData.SetTempDir(path); }
     bool AddBook(const wxString& book, bool show_wait_msg = FALSE);
-    bool Display(const wxString& x)
-    {
-        CreateHelpWindow(); return m_helpFrame->Display(x);
-    }
-    bool Display(int id)
-    {
-        CreateHelpWindow(); return m_helpFrame->Display(id);
-    }
-    bool DisplayContents()
-    {
-        CreateHelpWindow(); return m_helpFrame->DisplayContents();
-    }
-    bool DisplayIndex()
-    {
-        CreateHelpWindow(); return m_helpFrame->DisplayIndex();
-    }
-    bool KeywordSearch(const wxString& keyword)
-    {
-        CreateHelpWindow(); return m_helpFrame->KeywordSearch(keyword);
-    }
+
+    bool Display(const wxString& x);
+    bool Display(int id);
+    bool DisplayContents();
+    bool DisplayIndex();
+    bool KeywordSearch(const wxString& keyword);
+
     wxHtmlHelpFrame* GetFrame() { return m_helpFrame; }
     void UseConfig(wxConfigBase *config, const wxString& rootpath = wxEmptyString);
 
@@ -94,6 +81,10 @@ public:
 
     void OnCloseFrame(wxCloseEvent& evt);
 
+    // Make the help controller's frame 'modal' if
+    // needed
+    void AddGrabIfNeeded();
+
 protected:
     virtual wxHtmlHelpFrame* CreateHelpFrame(wxHtmlHelpData *data);