Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / msw / helpwin.cpp

diff --git a/src/msw/helpwin.cpp b/src/msw/helpwin.cpp
index 068165f21edd5d773fbc90ff568a5c75331a2bfc..f3795942288b2287801f053bfeaaa21534a58016 100644 (file)
--- a/src/msw/helpwin.cpp
+++ b/src/msw/helpwin.cpp
@@ -1,148 +1,127 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        helpwin.cpp
+// Name:        src/msw/helpwin.cpp
 // Purpose:     Help system: WinHelp implementation
 // Author:      Julian Smart
 // Modified by:
 // Created:     04/01/98
 // RCS-ID:      $Id$
-// Copyright:   (c) Julian Smart and Markus Holzem
-// Licence:    wxWindows license
+// Copyright:   (c) Julian Smart
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
-#ifdef __GNUG__
-#pragma implementation "helpwin.h"
-#endif
-
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
-#pragma hdrstop
+    #pragma hdrstop
 #endif
 
+#if wxUSE_HELP
+
 #ifndef WX_PRECOMP
-#include "wx/defs.h"
 #endif
 
+#include "wx/filename.h"
 #include "wx/msw/helpwin.h"
 
-#if wxUSE_HELP
 #include <time.h>
 
 #ifdef __WXMSW__
-#include <wx/msw/private.h>
+#include "wx/msw/private.h"
 #endif
 
 #include <string.h>
 
-// MAX path length
-#define _MAXPATHLEN 500
-
-// MAX length of Help descriptor
-#define _MAX_HELP_LEN 500
-
-#if !USE_SHARED_LIBRARY
-IMPLEMENT_DYNAMIC_CLASS(wxWinHelpController, wxHelpControllerBase)
-#endif
-
-wxWinHelpController::wxWinHelpController(void)
+static HWND GetSuitableHWND(wxWinHelpController* controller)
 {
-  m_helpFile = "";
+    if (controller->GetParentWindow())
+        return (HWND) controller->GetParentWindow()->GetHWND();
+    else if (wxTheApp->GetTopWindow())
+        return (HWND) wxTheApp->GetTopWindow()->GetHWND();
+    else
+        return GetDesktopWindow();
 }
 
-wxWinHelpController::~wxWinHelpController(void)
-{
-}
+IMPLEMENT_DYNAMIC_CLASS(wxWinHelpController, wxHelpControllerBase)
 
 bool wxWinHelpController::Initialize(const wxString& filename)
 {
-  m_helpFile = filename;
-  return TRUE;
+    m_helpFile = filename;
+    return true;
 }
 
 bool wxWinHelpController::LoadFile(const wxString& file)
 {
-  m_helpFile = file;
-  return TRUE;
+    if (!file.empty())
+        m_helpFile = file;
+    return true;
 }
 
 bool wxWinHelpController::DisplayContents(void)
 {
-    if (m_helpFile == "") return FALSE;
-
-    char buf[_MAXPATHLEN];
-    strcpy(buf, (const char*) m_helpFile);
-    size_t len = strlen(buf);
-    if (!(buf[len-1] == 'p' && buf[len-2] == 'l' && buf[len-3] == 'h' && buf[len-4] == '.'))
-      strcat(buf, ".hlp");
-    if (wxTheApp->GetTopWindow())
-    {
-#if defined(__WIN95__)
-      WinHelp((HWND) wxTheApp->GetTopWindow()->GetHWND(), buf, HELP_FINDER, 0L);
-#else
-      WinHelp((HWND) wxTheApp->GetTopWindow()->GetHWND(), buf, HELP_CONTENTS, 0L);
-#endif
-     return TRUE;
-    }
-       return FALSE;
+    if (m_helpFile.empty()) return false;
+
+    wxString str = GetValidFilename(m_helpFile);
+
+    return (WinHelp(GetSuitableHWND(this), str.t_str(), HELP_FINDER, 0L) != 0);
 }
 
 bool wxWinHelpController::DisplaySection(int section)
 {
-  // No WinHelp equivalent for this
-  return FALSE;
+    // Use context number
+    if (m_helpFile.empty()) return false;
+
+    wxString str = GetValidFilename(m_helpFile);
+
+    return (WinHelp(GetSuitableHWND(this), str.t_str(), HELP_CONTEXT, (DWORD)section) != 0);
+}
+
+bool wxWinHelpController::DisplayContextPopup(int contextId)
+{
+    if (m_helpFile.empty()) return false;
+
+    wxString str = GetValidFilename(m_helpFile);
+
+    return (WinHelp(GetSuitableHWND(this), str.t_str(), HELP_CONTEXTPOPUP, (DWORD) contextId) != 0);
 }
 
 bool wxWinHelpController::DisplayBlock(long block)
 {
-    // Use context number -- a very rough equivalent to block id!
-    if (m_helpFile == "") return FALSE;
-
-    char buf[_MAXPATHLEN];
-    strcpy(buf, m_helpFile);
-    size_t len = strlen(buf);
-    if (!(buf[len-1] == 'p' && buf[len-2] == 'l' && buf[len-3] == 'h' && buf[len-4] == '.'))
-      strcat(buf, ".hlp");
-    if (wxTheApp->GetTopWindow())
-       {
-      WinHelp((HWND) wxTheApp->GetTopWindow()->GetHWND(), buf, HELP_CONTEXT, (DWORD)block);
-      return TRUE;
-       }
-    return FALSE;
+    DisplaySection(block);
+    return true;
 }
 
-bool wxWinHelpController::KeywordSearch(const wxString& k)
+bool wxWinHelpController::KeywordSearch(const wxString& k,
+                                        wxHelpSearchMode WXUNUSED(mode))
 {
-    if (m_helpFile == "") return FALSE;
-
-    char buf[_MAXPATHLEN];
-    strcpy(buf, m_helpFile);
-    size_t len = strlen(buf);
-    if (!(buf[len-1] == 'p' && buf[len-2] == 'l' && buf[len-3] == 'h' && buf[len-4] == '.'))
-      strcat(buf, ".hlp");
-    if (wxTheApp->GetTopWindow())
-    {
-      WinHelp((HWND) wxTheApp->GetTopWindow()->GetHWND(), buf, HELP_PARTIALKEY, (DWORD)(const char*) k);
-      return TRUE;
-    }
-    return FALSE;
+    if (m_helpFile.empty()) return false;
+
+    wxString str = GetValidFilename(m_helpFile);
+
+    return WinHelp(GetSuitableHWND(this), str.t_str(), HELP_PARTIALKEY,
+                   (ULONG_PTR)wxMSW_CONV_LPCTSTR(k)) != 0;
 }
 
 // Can't close the help window explicitly in WinHelp
 bool wxWinHelpController::Quit(void)
 {
-  if (wxTheApp->GetTopWindow())
-  {
-    WinHelp((HWND) wxTheApp->GetTopWindow()->GetHWND(), 0, HELP_QUIT, 0L);
-    return TRUE;
-  }
-  else
-    return FALSE;
+    return WinHelp(GetSuitableHWND(this), 0, HELP_QUIT, 0) != 0;
 }
 
-// Don't get notified of WinHelp quitting
-void wxWinHelpController::OnQuit(void)
+// Append extension if necessary.
+wxString wxWinHelpController::GetValidFilename(const wxString& file) const
 {
+    wxString path, name, ext;
+    wxFileName::SplitPath(file, & path, & name, & ext);
+
+    wxString fullName;
+    if (path.empty())
+        fullName = name + wxT(".hlp");
+    else if (path.Last() == wxT('\\'))
+        fullName = path + name + wxT(".hlp");
+    else
+        fullName = path + wxT("\\") + name + wxT(".hlp");
+    return fullName;
 }
 
 #endif // wxUSE_HELP