Deprecate wxDC::{Begin,End}Drawing()

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

diff --git a/src/msw/filedlg.cpp b/src/msw/filedlg.cpp
index d00e0c05c2e14f4b86b37313c392a686478c0089..f71cfb69c8ccc5b6a6f43469b2861429644d8ce8 100644 (file)
--- a/src/msw/filedlg.cpp
+++ b/src/msw/filedlg.cpp
@@ -206,6 +206,30 @@ void wxFileDialog::DoMoveWindow(int x, int y, int WXUNUSED(width), int WXUNUSED(
     */
 }
 
+// helper used below in ShowModal(): style is used to determine whether to show
+// the "Save file" dialog (if it contains wxSAVE bit) or "Open file" one;
+// returns true on success or false on failure in which case err is filled with
+// the CDERR_XXX constant
+static bool DoShowCommFileDialog(OPENFILENAME *of, long style, DWORD *err)
+{
+    if ( style & wxSAVE ? GetSaveFileName(of) : GetOpenFileName(of) )
+        return true;
+
+    if ( err )
+    {
+#ifdef __WXWINCE__
+        // according to MSDN, CommDlgExtendedError() should work under CE as
+        // well but apparently in practice it doesn't (anybody has more
+        // details?)
+        *err = GetLastError();
+#else
+        *err = CommDlgExtendedError();
+#endif
+    }
+
+    return false;
+}
+
 int wxFileDialog::ShowModal()
 {
     HWND hWnd = 0;
@@ -257,7 +281,8 @@ int wxFileDialog::ShowModal()
     }
 
     // if wxCHANGE_DIR flag is not given we shouldn't change the CWD which the
-    // standard dialog does by default
+    // standard dialog does by default (notice that under NT it does it anyhow,
+    // OFN_NOCHANGEDIR or not, see below)
     if ( !(m_dialogStyle & wxCHANGE_DIR) )
     {
         msw_flags |= OFN_NOCHANGEDIR;
@@ -275,7 +300,7 @@ int wxFileDialog::ShowModal()
     // comcdlg32.dll, but as we don't use the extended fields anyhow, set
     // the struct size to the old value - otherwise, the programs compiled
     // with new headers will not work with the old libraries
-#if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0500)
+#if !defined(__WXWINCE__) && defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0500)
     of.lStructSize       = sizeof(OPENFILENAME) -
                            (sizeof(void *) + 2*sizeof(DWORD));
 #else // old headers
@@ -387,35 +412,45 @@ int wxFileDialog::ShowModal()
         }
     }
 
-    //== Execute FileDialog >>=================================================
+    // store off before the standard windows dialog can possibly change it
+    const wxString cwdOrig = wxGetCwd();
 
-    bool success = (m_dialogStyle & wxSAVE ? GetSaveFileName(&of)
-                                           : GetOpenFileName(&of)) != 0;
+    //== Execute FileDialog >>=================================================
 
-    DWORD errCode = CommDlgExtendedError();
+    DWORD errCode;
+    bool success = DoShowCommFileDialog(&of, m_dialogStyle, &errCode);
 
-#ifdef __WIN32__
-    if (!success && (errCode == CDERR_STRUCTSIZE))
+    // sometimes we may have a mismatch between the headers used to compile the
+    // library and the run-time version of comdlg32.dll, try to account for it
+#ifndef __WXWINCE__
+    if ( !success && errCode == CDERR_STRUCTSIZE )
     {
         // The struct size has changed so try a smaller or bigger size
+        const int oldStructSize = of.lStructSize;
+        of.lStructSize = oldStructSize - (sizeof(void *) + 2*sizeof(DWORD));
+        success = DoShowCommFileDialog(&of, m_dialogStyle, &errCode);
 
-        int oldStructSize = of.lStructSize;
-        of.lStructSize       = oldStructSize - (sizeof(void *) + 2*sizeof(DWORD));
-        success = (m_dialogStyle & wxSAVE) ? (GetSaveFileName(&of) != 0)
-                                            : (GetOpenFileName(&of) != 0);
-        errCode = CommDlgExtendedError();
-
-        if (!success && (errCode == CDERR_STRUCTSIZE))
+        if ( !success && (errCode == CDERR_STRUCTSIZE) )
         {
-            of.lStructSize       = oldStructSize + (sizeof(void *) + 2*sizeof(DWORD));
-            success = (m_dialogStyle & wxSAVE) ? (GetSaveFileName(&of) != 0)
-                                            : (GetOpenFileName(&of) != 0);
+            // try to adjust in the other direction
+            of.lStructSize = oldStructSize + (sizeof(void *) + 2*sizeof(DWORD));
+            success = DoShowCommFileDialog(&of, m_dialogStyle, &errCode);
         }
     }
-#endif // __WIN32__
+#endif // !__WXWINCE__
 
     if ( success )
     {
+        // GetOpenFileName will always change the current working directory on 
+        // (according to MSDN) "Windows NT 4.0/2000/XP" because the flag
+        // OFN_NOCHANGEDIR has no effect.  If the user did not specify
+        // wxCHANGE_DIR let's restore the current working directory to what it
+        // was before the dialog was shown.
+        if ( msw_flags & OFN_NOCHANGEDIR )
+        {
+            wxSetWorkingDirectory(cwdOrig);
+        }
+
         m_fileNames.Empty();
 
         if ( ( m_dialogStyle & wxMULTIPLE ) &&
@@ -482,20 +517,19 @@ int wxFileDialog::ShowModal()
             m_dir = wxPathOnly(fileNameBuffer);
         }
     }
+#ifdef __WXDEBUG__
     else
     {
         // common dialog failed - why?
-#ifdef __WXDEBUG__
-        DWORD dwErr = CommDlgExtendedError();
-        if ( dwErr != 0 )
+        if ( errCode != 0 )
         {
-            // this msg is only for developers
+            // this msg is only for developers so don't translate it
             wxLogError(wxT("Common dialog failed with error code %0lx."),
-                       dwErr);
+                       errCode);
         }
         //else: it was just cancelled
-#endif
     }
+#endif // __WXDEBUG__
 
     return success ? wxID_OK : wxID_CANCEL;