src/msw/dirdlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dirdlg.cpp
   3 // Purpose:     wxDirDialog
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "dirdlg.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/utils.h"
  32     #include "wx/dialog.h"
  33     #include "wx/dirdlg.h"
  34     #include "wx/log.h"
  35 #endif
  36
  37 #include "wx/msw/private.h"
  38
  39 #if defined(__WIN95__) && \
  40     (!defined(__GNUWIN32__) || defined(wxUSE_NORLANDER_HEADERS))
  41     #define CAN_COMPILE_DIRDLG
  42 //#else: we provide a stub version which doesn't do anything
  43 #endif
  44
  45 #ifdef CAN_COMPILE_DIRDLG
  46     #include "shlobj.h" // Win95 shell
  47 #endif
  48
  49 // ----------------------------------------------------------------------------
  50 // constants
  51 // ----------------------------------------------------------------------------
  52
  53 #ifndef MAX_PATH
  54     #define MAX_PATH 4096      // be generuous
  55 #endif
  56
  57 // ----------------------------------------------------------------------------
  58 // wxWindows macros
  59 // ----------------------------------------------------------------------------
  60
  61 #if !USE_SHARED_LIBRARY
  62     IMPLEMENT_CLASS(wxDirDialog, wxDialog)
  63 #endif
  64
  65 // ----------------------------------------------------------------------------
  66 // private functions prototypes
  67 // ----------------------------------------------------------------------------
  68
  69 // free the parameter
  70 static void ItemListFree(LPITEMIDLIST pidl);
  71
  72 // the callback proc for the dir dlg
  73 static int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp,
  74                                        LPARAM pData);
  75
  76 // ============================================================================
  77 // implementation
  78 // ============================================================================
  79
  80 // ----------------------------------------------------------------------------
  81 // wxDirDialog
  82 // ----------------------------------------------------------------------------
  83
  84 wxDirDialog::wxDirDialog(wxWindow *parent,
  85                          const wxString& message,
  86                          const wxString& defaultPath,
  87                          long WXUNUSED(style),
  88                          const wxPoint& WXUNUSED(pos))
  89 {
  90     m_message = message;
  91     m_parent = parent;
  92     m_path = defaultPath;
  93 }
  94
  95 int wxDirDialog::ShowModal()
  96 {
  97 #ifdef CAN_COMPILE_DIRDLG
  98     BROWSEINFO bi;
  99     bi.hwndOwner      = m_parent ? GetHwndOf(m_parent) : NULL;
 100     bi.pidlRoot       = NULL;
 101     bi.pszDisplayName = NULL;
 102     bi.lpszTitle      = m_message.c_str();
 103     bi.ulFlags        = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
 104     bi.lpfn           = BrowseCallbackProc;
 105     bi.lParam         = (LPARAM)m_path.c_str();    // param for the callback
 106
 107     LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
 108
 109     if ( bi.pidlRoot )
 110     {
 111         ItemListFree((LPITEMIDLIST)bi.pidlRoot);
 112     }
 113
 114     if ( !pidl )
 115     {
 116         // Cancel button pressed
 117         return wxID_CANCEL;
 118     }
 119
 120     BOOL ok = SHGetPathFromIDList(pidl, m_path.GetWriteBuf(MAX_PATH));
 121     m_path.UngetWriteBuf();
 122
 123     ItemListFree(pidl);
 124
 125     if ( !ok )
 126     {
 127         wxLogLastError("SHGetPathFromIDList");
 128
 129         return wxID_CANCEL;
 130     }
 131
 132     return wxID_OK;
 133 #else // !CAN_COMPILE_DIRDLG
 134     return wxID_CANCEL;
 135 #endif // CAN_COMPILE_DIRDLG/!CAN_COMPILE_DIRDLG
 136 }
 137
 138 // ----------------------------------------------------------------------------
 139 // private functions
 140 // ----------------------------------------------------------------------------
 141
 142 static int CALLBACK
 143 BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp, LPARAM pData)
 144 {
 145     switch(uMsg)
 146     {
 147         case BFFM_INITIALIZED:
 148             // sent immediately after initialisation and so we may set the
 149             // initial selection here
 150             //
 151             // wParam = TRUE => lParam is a string and not a PIDL
 152             SendMessage(hwnd, BFFM_SETSELECTION, TRUE, pData);
 153             break;
 154
 155         case BFFM_SELCHANGED:
 156             {
 157                 // Set the status window to the currently selected path.
 158                 TCHAR szDir[MAX_PATH];
 159                 if ( SHGetPathFromIDList((LPITEMIDLIST)lp, szDir) )
 160                 {
 161                     SendMessage(hwnd, BFFM_SETSTATUSTEXT, 0, (LPARAM)szDir);
 162                 }
 163             }
 164             break;
 165
 166         //case BFFM_VALIDATEFAILED: -- might be used to provide custom message
 167         //                             if the user types in invalid dir name
 168     }
 169
 170     return 0;
 171 }
 172
 173
 174 static void ItemListFree(LPITEMIDLIST pidl)
 175 {
 176     if ( pidl )
 177     {
 178         LPMALLOC pMalloc;
 179         SHGetMalloc(&pMalloc);
 180         if ( pMalloc )
 181         {
 182             pMalloc->Free(pidl);
 183             pMalloc->Release();
 184         }
 185         else
 186         {
 187             wxLogLastError("SHGetMalloc");
 188         }
 189     }
 190 }
 191