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     IMPLEMENT_CLASS(wxDirDialog, wxDialog)
  62
  63 // ----------------------------------------------------------------------------
  64 // private functions prototypes
  65 // ----------------------------------------------------------------------------
  66
  67 // free the parameter
  68 static void ItemListFree(LPITEMIDLIST pidl);
  69
  70 // the callback proc for the dir dlg
  71 static int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp,
  72                                        LPARAM pData);
  73
  74 // ============================================================================
  75 // implementation
  76 // ============================================================================
  77
  78 // ----------------------------------------------------------------------------
  79 // wxDirDialog
  80 // ----------------------------------------------------------------------------
  81
  82 wxDirDialog::wxDirDialog(wxWindow *parent,
  83                          const wxString& message,
  84                          const wxString& defaultPath,
  85                          long WXUNUSED(style),
  86                          const wxPoint& WXUNUSED(pos))
  87 {
  88     m_message = message;
  89     m_parent = parent;
  90     m_path = defaultPath;
  91 }
  92
  93 int wxDirDialog::ShowModal()
  94 {
  95 #ifdef CAN_COMPILE_DIRDLG
  96     BROWSEINFO bi;
  97     bi.hwndOwner      = m_parent ? GetHwndOf(m_parent) : NULL;
  98     bi.pidlRoot       = NULL;
  99     bi.pszDisplayName = NULL;
 100     bi.lpszTitle      = m_message.c_str();
 101     bi.ulFlags        = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
 102     bi.lpfn           = BrowseCallbackProc;
 103     bi.lParam         = (LPARAM)m_path.c_str();    // param for the callback
 104
 105     LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
 106
 107     if ( bi.pidlRoot )
 108     {
 109         ItemListFree((LPITEMIDLIST)bi.pidlRoot);
 110     }
 111
 112     if ( !pidl )
 113     {
 114         // Cancel button pressed
 115         return wxID_CANCEL;
 116     }
 117
 118     BOOL ok = SHGetPathFromIDList(pidl, m_path.GetWriteBuf(MAX_PATH));
 119     m_path.UngetWriteBuf();
 120
 121     ItemListFree(pidl);
 122
 123     if ( !ok )
 124     {
 125         wxLogLastError("SHGetPathFromIDList");
 126
 127         return wxID_CANCEL;
 128     }
 129
 130     return wxID_OK;
 131 #else // !CAN_COMPILE_DIRDLG
 132     return wxID_CANCEL;
 133 #endif // CAN_COMPILE_DIRDLG/!CAN_COMPILE_DIRDLG
 134 }
 135
 136 // ----------------------------------------------------------------------------
 137 // private functions
 138 // ----------------------------------------------------------------------------
 139
 140 static int CALLBACK
 141 BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp, LPARAM pData)
 142 {
 143     switch(uMsg)
 144     {
 145         case BFFM_INITIALIZED:
 146             // sent immediately after initialisation and so we may set the
 147             // initial selection here
 148             //
 149             // wParam = TRUE => lParam is a string and not a PIDL
 150             SendMessage(hwnd, BFFM_SETSELECTION, TRUE, pData);
 151             break;
 152
 153         case BFFM_SELCHANGED:
 154             {
 155                 // Set the status window to the currently selected path.
 156                 TCHAR szDir[MAX_PATH];
 157                 if ( SHGetPathFromIDList((LPITEMIDLIST)lp, szDir) )
 158                 {
 159                     SendMessage(hwnd, BFFM_SETSTATUSTEXT, 0, (LPARAM)szDir);
 160                 }
 161             }
 162             break;
 163
 164         //case BFFM_VALIDATEFAILED: -- might be used to provide custom message
 165         //                             if the user types in invalid dir name
 166     }
 167
 168     return 0;
 169 }
 170
 171
 172 static void ItemListFree(LPITEMIDLIST pidl)
 173 {
 174     if ( pidl )
 175     {
 176         LPMALLOC pMalloc;
 177         SHGetMalloc(&pMalloc);
 178         if ( pMalloc )
 179         {
 180             pMalloc->Free(pidl);
 181             pMalloc->Release();
 182         }
 183         else
 184         {
 185             wxLogLastError("SHGetMalloc");
 186         }
 187     }
 188 }
 189