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
  20 #ifdef __GNUG__
  21     #pragma implementation "dirdlg.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_DIRDLG
  32
  33 #if defined(__WIN95__) && !defined(__GNUWIN32_OLD__) && wxUSE_OLE
  34
  35 #ifndef WX_PRECOMP
  36     #include "wx/utils.h"
  37     #include "wx/dialog.h"
  38     #include "wx/dirdlg.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"     // for GetComCtl32Version()
  41 #endif
  42
  43 #include "wx/msw/private.h"
  44
  45 #include <shlobj.h> // Win95 shell
  46
  47 // ----------------------------------------------------------------------------
  48 // constants
  49 // ----------------------------------------------------------------------------
  50
  51 #ifndef MAX_PATH
  52     #define MAX_PATH 4096      // be generous
  53 #endif
  54
  55 #ifndef BIF_NEWDIALOGSTYLE
  56     #define BIF_NEWDIALOGSTYLE 0x0040
  57 #endif
  58
  59 #ifndef BIF_NONEWFOLDERBUTTON
  60     #define BIF_NONEWFOLDERBUTTON  0x0200
  61 #endif
  62
  63 // ----------------------------------------------------------------------------
  64 // wxWindows macros
  65 // ----------------------------------------------------------------------------
  66
  67 IMPLEMENT_CLASS(wxDirDialog, wxDialog)
  68
  69 // ----------------------------------------------------------------------------
  70 // private functions prototypes
  71 // ----------------------------------------------------------------------------
  72
  73 // free the parameter
  74 static void ItemListFree(LPITEMIDLIST pidl);
  75
  76 // the callback proc for the dir dlg
  77 static int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp,
  78                                        LPARAM pData);
  79
  80
  81 // ============================================================================
  82 // implementation
  83 // ============================================================================
  84
  85 // ----------------------------------------------------------------------------
  86 // wxDirDialog
  87 // ----------------------------------------------------------------------------
  88
  89 wxDirDialog::wxDirDialog(wxWindow *parent,
  90                          const wxString& message,
  91                          const wxString& defaultPath,
  92                          long style,
  93                          const wxPoint& WXUNUSED(pos),
  94                          const wxSize& WXUNUSED(size),
  95                          const wxString& WXUNUSED(name))
  96 {
  97     m_message = message;
  98     m_parent = parent;
  99
 100     SetStyle(style);
 101     SetPath(defaultPath);
 102 }
 103
 104 void wxDirDialog::SetPath(const wxString& path)
 105 {
 106     m_path = path;
 107
 108     // SHBrowseForFolder doesn't like '/'s nor the trailing backslashes
 109     m_path.Replace(_T("/"), _T("\\"));
 110     if ( !m_path.empty() )
 111     {
 112         while ( *(m_path.end() - 1) == _T('\\') )
 113         {
 114             m_path.erase(m_path.length() - 1);
 115         }
 116
 117         // but the root drive should have a trailing slash (again, this is just
 118         // the way the native dialog works)
 119         if ( *(m_path.end() - 1) == _T(':') )
 120         {
 121             m_path += _T('\\');
 122         }
 123     }
 124 }
 125
 126 int wxDirDialog::ShowModal()
 127 {
 128     wxWindow *parent = GetParent();
 129
 130     BROWSEINFO bi;
 131     bi.hwndOwner      = parent ? GetHwndOf(parent) : NULL;
 132     bi.pidlRoot       = NULL;
 133     bi.pszDisplayName = NULL;
 134     bi.lpszTitle      = m_message.c_str();
 135     bi.ulFlags        = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
 136     bi.lpfn           = BrowseCallbackProc;
 137     bi.lParam         = (LPARAM)m_path.c_str();    // param for the callback
 138
 139     static const int verComCtl32 = wxApp::GetComCtl32Version();
 140
 141     // we always add the edit box (it doesn't hurt anybody, does it?) if it is
 142     // supported by the system
 143     if ( verComCtl32 >= 471 )
 144     {
 145         bi.ulFlags |= BIF_EDITBOX;
 146     }
 147
 148     // normally the commented out part should work -- but in practice
 149     // BIF_NONEWFOLDERBUTTON doesn't have any effect (Win2k, comctl 5.81) so I
 150     // have to disable it [for now]
 151 #if 0
 152     // to have the "New Folder" button we must use the "new" dialog style which
 153     // is also the only way to have a resizable dialog
 154     //
 155     // "new" style is only available in the version 5.0+ of comctl32.dll
 156     const bool needNewDir = HasFlag(wxDD_NEW_DIR_BUTTON);
 157     if ( (needNewDir || HasFlag(wxRESIZE_BORDER)) && (verComCtl32 >= 500) )
 158     {
 159         bi.ulFlags |= BIF_NEWDIALOGSTYLE;
 160
 161         // we'll get the "New Folder" button by default now, don't show it if
 162         // not needed
 163         if ( !needNewDir )
 164             bi.ulFlags |= BIF_NONEWFOLDERBUTTON;
 165     }
 166 #else
 167     if ( HasFlag(wxDD_NEW_DIR_BUTTON) && verComCtl32 >= 500 )
 168     {
 169         // use the new style to make the "New Folder" button appear
 170         bi.ulFlags |= BIF_NEWDIALOGSTYLE;
 171     }
 172 #endif
 173
 174     // do show the dialog
 175     LPITEMIDLIST pidl = SHBrowseForFolder(&bi);
 176
 177     if ( bi.pidlRoot )
 178     {
 179         ItemListFree((LPITEMIDLIST)bi.pidlRoot);
 180     }
 181
 182     if ( !pidl )
 183     {
 184         // Cancel button pressed
 185         return wxID_CANCEL;
 186     }
 187
 188     BOOL ok = SHGetPathFromIDList(pidl, wxStringBuffer(m_path, MAX_PATH));
 189
 190     ItemListFree(pidl);
 191
 192     if ( !ok )
 193     {
 194         wxLogLastError(wxT("SHGetPathFromIDList"));
 195
 196         return wxID_CANCEL;
 197     }
 198
 199     return wxID_OK;
 200 }
 201
 202 // ----------------------------------------------------------------------------
 203 // private functions
 204 // ----------------------------------------------------------------------------
 205
 206 static int CALLBACK
 207 BrowseCallbackProc(HWND hwnd, UINT uMsg, LPARAM lp, LPARAM pData)
 208 {
 209     switch(uMsg)
 210     {
 211         case BFFM_INITIALIZED:
 212             // sent immediately after initialisation and so we may set the
 213             // initial selection here
 214             //
 215             // wParam = TRUE => lParam is a string and not a PIDL
 216             SendMessage(hwnd, BFFM_SETSELECTION, TRUE, pData);
 217             break;
 218
 219         case BFFM_SELCHANGED:
 220             // note that this doesn't work with the new style UI (MSDN doesn't
 221             // say anything about it, but the comments in shlobj.h do!) but we
 222             // still execute this code in case it starts working again with the
 223             // "new new UI" (or would it be "NewUIEx" according to tradition?)
 224             {
 225                 // Set the status window to the currently selected path.
 226                 wxString strDir;
 227                 if ( SHGetPathFromIDList((LPITEMIDLIST)lp,
 228                                          wxStringBuffer(strDir, MAX_PATH)) )
 229                 {
 230                     // NB: this shouldn't be necessary with the new style box
 231                     //     (which is resizable), but as for now it doesn't work
 232                     //     anyhow (see the comment above) no harm in doing it
 233
 234                     // need to truncate or it displays incorrectly
 235                     static const size_t maxChars = 37;
 236                     if ( strDir.length() > maxChars )
 237                     {
 238                         strDir = strDir.Right(maxChars);
 239                         strDir = wxString(wxT("...")) + strDir;
 240                     }
 241
 242                     SendMessage(hwnd, BFFM_SETSTATUSTEXT,
 243                                 0, (LPARAM)strDir.c_str());
 244                 }
 245             }
 246             break;
 247
 248         //case BFFM_VALIDATEFAILED: -- might be used to provide custom message
 249         //                             if the user types in invalid dir name
 250     }
 251
 252     return 0;
 253 }
 254
 255
 256 static void ItemListFree(LPITEMIDLIST pidl)
 257 {
 258     if ( pidl )
 259     {
 260         LPMALLOC pMalloc;
 261         SHGetMalloc(&pMalloc);
 262         if ( pMalloc )
 263         {
 264             pMalloc->Free(pidl);
 265             pMalloc->Release();
 266         }
 267         else
 268         {
 269             wxLogLastError(wxT("SHGetMalloc"));
 270         }
 271     }
 272 }
 273
 274 #else
 275     #include "../generic/dirdlgg.cpp"
 276 #endif // compiler/platform on which the code here compiles
 277
 278 #endif // wxUSE_DIRDLG