Don't emit bogus size events if a child window

[wxWidgets.git] / src / common / cshelp.cpp

diff --git a/src/common/cshelp.cpp b/src/common/cshelp.cpp
index f1433c3bed7d53f257da13537b61ea78239717e2..f94b9e67d7acc94439f79941e5d46df7e6644974 100644 (file)
--- a/src/common/cshelp.cpp
+++ b/src/common/cshelp.cpp
@@ -34,6 +34,16 @@
 #include "wx/module.h"
 #include "wx/cshelp.h"
 
+// wxUSE_MS_HTML_HELP is not defined under platforms other than MSW
+#ifndef wxUSE_MS_HTML_HELP
+    #define wxUSE_MS_HTML_HELP 0
+#endif
+
+#if wxUSE_MS_HTML_HELP
+    #include "wx/msw/helpchm.h"     // for ShowContextHelpPopup
+    #include "wx/utils.h"           // for wxGetMousePosition()
+#endif
+
 // ----------------------------------------------------------------------------
 // wxContextHelpEvtHandler private class
 // ----------------------------------------------------------------------------
@@ -223,22 +233,13 @@ bool wxContextHelpEvtHandler::ProcessEvent(wxEvent& event)
 // Dispatch the help event to the relevant window
 bool wxContextHelp::DispatchEvent(wxWindow* win, const wxPoint& pt)
 {
-    wxWindow* subjectOfHelp = win;
-    bool eventProcessed = false;
-    while (subjectOfHelp && !eventProcessed)
-    {
-        wxHelpEvent helpEvent(wxEVT_HELP, subjectOfHelp->GetId(), pt,
-                              wxHelpEvent::Origin_HelpButton);
-        helpEvent.SetEventObject(subjectOfHelp);
+    wxCHECK_MSG( win, false, _T("win parameter can't be NULL") );
 
-        eventProcessed = win->GetEventHandler()->ProcessEvent(helpEvent);
+    wxHelpEvent helpEvent(wxEVT_HELP, win->GetId(), pt,
+                          wxHelpEvent::Origin_HelpButton);
+    helpEvent.SetEventObject(win);
 
-        // Go up the window hierarchy until the event is handled (or not).
-        // I.e. keep submitting ancestor windows until one is recognised
-        // by the app code that processes the ids and displays help.
-        subjectOfHelp = subjectOfHelp->GetParent();
-    }
-    return eventProcessed;
+    return win->GetEventHandler()->ProcessEvent(helpEvent);
 }
 
 // ----------------------------------------------------------------------------
@@ -327,6 +328,25 @@ wxHelpProvider::~wxHelpProvider()
 {
 }
 
+wxString wxHelpProvider::GetHelpTextMaybeAtPoint(wxWindowBase *window)
+{
+    if ( m_helptextAtPoint != wxDefaultPosition ||
+            m_helptextOrigin != wxHelpEvent::Origin_Unknown )
+    {
+        wxCHECK_MSG( window, wxEmptyString, _T("window must not be NULL") );
+
+        wxPoint pt = m_helptextAtPoint;
+        wxHelpEvent::Origin origin = m_helptextOrigin;
+
+        m_helptextAtPoint = wxDefaultPosition;
+        m_helptextOrigin = wxHelpEvent::Origin_Unknown;
+
+        return window->GetHelpTextAtPoint(pt, origin);
+    }
+
+    return GetHelp(window);
+}
+
 // ----------------------------------------------------------------------------
 // wxSimpleHelpProvider
 // ----------------------------------------------------------------------------
@@ -368,28 +388,46 @@ void wxSimpleHelpProvider::RemoveHelp(wxWindowBase* window)
 
 bool wxSimpleHelpProvider::ShowHelp(wxWindowBase *window)
 {
-#if wxUSE_TIPWINDOW
-    static wxTipWindow* s_tipWindow = NULL;
+#if wxUSE_MS_HTML_HELP || wxUSE_TIPWINDOW
+    const wxString text = GetHelpTextMaybeAtPoint(window);
 
-    if (s_tipWindow)
-    {
-        // Prevent s_tipWindow being nulled in OnIdle,
-        // thereby removing the chance for the window to be closed by ShowHelp
-        s_tipWindow->SetTipWindowPtr(NULL);
-        s_tipWindow->Close();
-    }
-    s_tipWindow = NULL;
-
-    wxString text = GetHelp(window);
     if ( !text.empty() )
     {
-        s_tipWindow = new wxTipWindow((wxWindow *)window, text, 100, & s_tipWindow);
+        // use the native help popup style if it's available
+#if wxUSE_MS_HTML_HELP
+        if ( !wxCHMHelpController::ShowContextHelpPopup
+                                   (
+                                        text,
+                                        wxGetMousePosition(),
+                                        (wxWindow *)window
+                                   ) )
+#endif // wxUSE_MS_HTML_HELP
+        {
+#if wxUSE_TIPWINDOW
+            static wxTipWindow* s_tipWindow = NULL;
+
+            if ( s_tipWindow )
+            {
+                // Prevent s_tipWindow being nulled in OnIdle, thereby removing
+                // the chance for the window to be closed by ShowHelp
+                s_tipWindow->SetTipWindowPtr(NULL);
+                s_tipWindow->Close();
+            }
+
+            s_tipWindow = new wxTipWindow((wxWindow *)window, text,
+                                            100, &s_tipWindow);
+#else // !wxUSE_TIPWINDOW
+            // we tried wxCHMHelpController but it failed and we don't have
+            // wxTipWindow to fall back on, so
+            return false;
+#endif // wxUSE_TIPWINDOW
+        }
 
         return true;
     }
-#else
+#else // !wxUSE_MS_HTML_HELP && !wxUSE_TIPWINDOW
     wxUnusedVar(window);
-#endif // wxUSE_TIPWINDOW
+#endif // wxUSE_MS_HTML_HELP || wxUSE_TIPWINDOW
 
     return false;
 }
@@ -405,29 +443,26 @@ wxHelpControllerHelpProvider::wxHelpControllerHelpProvider(wxHelpControllerBase*
 
 bool wxHelpControllerHelpProvider::ShowHelp(wxWindowBase *window)
 {
-    wxString text = GetHelp(window);
-    if ( !text.empty() )
-    {
-        if (m_helpController)
-        {
-            if (text.IsNumber())
-                return m_helpController->DisplayContextPopup(wxAtoi(text));
+    const wxString text = GetHelpTextMaybeAtPoint(window);
 
-            // If the help controller is capable of popping up the text...
-            else if (m_helpController->DisplayTextPopup(text, wxGetMousePosition()))
-            {
-                return true;
-            }
-            else
-            // ...else use the default method.
-                return wxSimpleHelpProvider::ShowHelp(window);
-        }
-        else
-            return wxSimpleHelpProvider::ShowHelp(window);
+    if ( text.empty() )
+        return false;
 
+    if ( m_helpController )
+    {
+        // if it's a numeric topic, show it
+        long topic;
+        if ( text.ToLong(&topic) )
+            return m_helpController->DisplayContextPopup(topic);
+
+        // otherwise show the text directly
+        if ( m_helpController->DisplayTextPopup(text, wxGetMousePosition()) )
+            return true;
     }
 
-    return false;
+    // if there is no help controller or it's not capable of showing the help,
+    // fallback to the default method
+    return wxSimpleHelpProvider::ShowHelp(window);
 }
 
 // Convenience function for turning context id into wxString