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ENH: add better path chooser dialog
This commit is contained in:
Bill Hoffman
380
Source/MFCDialog/PathDialog.cpp
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380
Source/MFCDialog/PathDialog.cpp
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//////////////////////////////////////////////////////////////////////////
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//PathDialog.h file
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//
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//Written by Nguyen Tan Hung <tanhung@yahoo.com>
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//////////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "PathDialog.h"
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#include <io.h>
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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#define IDC_FOLDERTREE 0x3741
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#define IDC_TITLE 0x3742
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#define IDC_STATUSTEXT 0x3743
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#define IDC_NEW_EDIT_PATH 0x3744
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// Class CDlgWnd
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BEGIN_MESSAGE_MAP(CPathDialogSub, CWnd)
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ON_BN_CLICKED(IDOK, OnOK)
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ON_EN_CHANGE(IDC_NEW_EDIT_PATH, OnChangeEditPath)
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END_MESSAGE_MAP()
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void CPathDialogSub::OnOK()
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{
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::GetWindowText(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH),
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m_pPathDialog->m_szPathName, MAX_PATH);
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if(CPathDialog::MakeSurePathExists(m_pPathDialog->m_szPathName)==0)
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{
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m_pPathDialog->m_bGetSuccess=TRUE;
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::EndDialog(m_pPathDialog->m_hWnd, IDOK);
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}
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else
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{
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::SetFocus(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH));
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}
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}
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void CPathDialogSub::OnChangeEditPath()
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{
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::GetWindowText(::GetDlgItem(m_hWnd, IDC_NEW_EDIT_PATH),
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m_pPathDialog->m_szPathName, MAX_PATH);
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BOOL bEnableOKButton = (_tcslen(m_pPathDialog->m_szPathName)>0);
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SendMessage(BFFM_ENABLEOK, 0, bEnableOKButton);
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}
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/////////////////////////////////////////////////////////////////////////////
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// CPathDialog dialog
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CPathDialog::CPathDialog(LPCTSTR lpszCaption,
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LPCTSTR lpszTitle,
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LPCTSTR lpszInitialPath,
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CWnd* pParent)
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{
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m_hWnd=NULL;
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m_PathDialogSub.m_pPathDialog= this;
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m_bParentDisabled = FALSE;
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// Get the true parent of the dialog
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m_pParentWnd = CWnd::GetSafeOwner(pParent);
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m_lpszCaption = lpszCaption;
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m_lpszInitialPath = lpszInitialPath;
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memset(&m_bi, 0, sizeof(BROWSEINFO) );
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m_bi.hwndOwner = (m_pParentWnd==NULL)?NULL:m_pParentWnd->GetSafeHwnd();
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m_bi.pszDisplayName = 0;
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m_bi.pidlRoot = 0;
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m_bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_STATUSTEXT;
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m_bi.lpfn = BrowseCallbackProc;
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m_bi.lpszTitle = lpszTitle;
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}
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/////////////////////////////////////////////////////////////////////////////
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// CPathDialog message handlers
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CString CPathDialog::GetPathName()
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{
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return CString(m_szPathName);
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}
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int CALLBACK CPathDialog::BrowseCallbackProc(HWND hwnd,UINT uMsg,LPARAM lParam, LPARAM pData)
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{
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CPathDialog* pDlg = (CPathDialog*)pData;
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switch(uMsg)
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{
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case BFFM_INITIALIZED:
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{
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RECT rc;
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HWND hEdit;
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HFONT hFont;
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pDlg->m_hWnd = hwnd;
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if(pDlg->m_lpszCaption!=NULL)
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{
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::SetWindowText(hwnd, pDlg->m_lpszCaption);
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}
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VERIFY(pDlg->m_PathDialogSub.SubclassWindow(hwnd));
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::ShowWindow(::GetDlgItem(hwnd, IDC_STATUSTEXT), SW_HIDE);
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::GetWindowRect(::GetDlgItem(hwnd, IDC_FOLDERTREE), &rc);
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rc.bottom = rc.top - 4;
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rc.top = rc.bottom - 23;
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::ScreenToClient(hwnd, (LPPOINT)&rc);
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::ScreenToClient(hwnd, ((LPPOINT)&rc)+1);
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hEdit = ::CreateWindowEx(WS_EX_CLIENTEDGE, _T("EDIT"), _T(""),
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WS_CHILD|WS_TABSTOP|WS_VISIBLE|ES_AUTOHSCROLL,
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rc.left, rc.top,
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rc.right-rc.left, rc.bottom-rc.top,
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hwnd, NULL, NULL, NULL);
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::SetWindowLong(hEdit, GWL_ID, IDC_NEW_EDIT_PATH);
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::ShowWindow(hEdit, SW_SHOW);
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hFont = (HFONT)::SendMessage(hwnd, WM_GETFONT, 0, 0);
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::SendMessage(hEdit, WM_SETFONT, (WPARAM)hFont, MAKELPARAM(TRUE, 0));
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LPCTSTR lpszPath = pDlg->m_lpszInitialPath;
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TCHAR szTemp[MAX_PATH];
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if(lpszPath==NULL)
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{
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::GetCurrentDirectory(MAX_PATH, szTemp );
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lpszPath = szTemp;
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}
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// WParam is TRUE since you are passing a path.
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// It would be FALSE if you were passing a pidl.
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::SendMessage(hwnd,BFFM_SETSELECTION,TRUE,
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(LPARAM)lpszPath);
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break;
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}
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case BFFM_SELCHANGED:
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{
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char szSelection[MAX_PATH];
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if(!::SHGetPathFromIDList((LPITEMIDLIST)lParam, szSelection) ||
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(szSelection[1] !=':' && szSelection[1] != '\\'))
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{
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szSelection[0] = '\0';
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::SendMessage(hwnd, BFFM_ENABLEOK, 0, FALSE);
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}
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else
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{
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::SendMessage(hwnd, BFFM_ENABLEOK, 0, TRUE);
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}
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::SendMessage(hwnd,BFFM_SETSTATUSTEXT,0,(LPARAM)szSelection);
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::SetWindowText(::GetDlgItem(hwnd, IDC_NEW_EDIT_PATH), szSelection);
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break;
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}
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default:
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break;
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}
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return 0;
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}
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int CPathDialog::DoModal()
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{
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/////////////////////////////////////////////////////////
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TCHAR szPathTemp[MAX_PATH];
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m_bi.lpfn = BrowseCallbackProc; // address of callback function
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m_bi.lParam = (LPARAM)this; // pass address of object to callback function
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m_bi.pszDisplayName = szPathTemp;
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LPITEMIDLIST pidl;
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LPMALLOC pMalloc;
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int iResult=-1;
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if(SUCCEEDED(SHGetMalloc(&pMalloc)))
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{
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m_bGetSuccess = FALSE;
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pidl = SHBrowseForFolder(&m_bi);
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if (pidl!=NULL)
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{
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//not need do this because OnOK function did
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//bSucceeded = SHGetPathFromIDList(pidl, m_szPathName);
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// In C++:
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pMalloc->Free(pidl);
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//In C:
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//pMalloc->lpVtbl->Free(pMalloc,pidl);
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//pMalloc->lpVtbl->Release(pMalloc);
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}
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if(m_bGetSuccess)
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{
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iResult = IDOK;
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}
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pMalloc->Release();
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}
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if(m_bParentDisabled && (m_pParentWnd!=NULL))
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{
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m_pParentWnd->EnableWindow(TRUE);
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}
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m_bParentDisabled=FALSE;
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return iResult;
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}
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BOOL CPathDialog::IsFileNameValid(LPCTSTR lpFileName)
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{
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return TRUE;
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}
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const TCHAR c_FolderDoesNotExist[] = _T(
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"The folder:\n\n"
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"%s\n\n"
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"does not exist. Do you want the folder to be created?");
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const TCHAR c_szErrInvalidPath[] = _T(
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"The folder:"
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"\n\n"
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"%s\n\n"
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"is invalid. Please reenter.");
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const TCHAR c_szErrCreatePath[] = _T(
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"The folder:"
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"\n\n"
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"%s"
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"\n\ncan not be created. Please double check.");
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//return -1: user break;
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//return 0: no error
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//return 1: lpPath is invalid
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//return 2: can not create lpPath
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int CPathDialog::MakeSurePathExists(LPCTSTR lpPath)
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{
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CString strMsg;
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int iRet;
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try
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{
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//validate path
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iRet=Touch(lpPath, TRUE);
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if(iRet!=0)
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{
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throw iRet;
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}
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if(_taccess(lpPath, 0)==0)
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{
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return (int)0;
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}
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strMsg.Format(c_FolderDoesNotExist, lpPath);
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if(AfxMessageBox(strMsg, MB_YESNO|MB_ICONQUESTION) != IDYES)
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{
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return (int)-1;
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}
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//create path
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iRet=Touch(lpPath, FALSE);
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if(iRet!=0)
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{
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throw iRet;
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}
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return 0;
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}
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catch(int nErrCode)
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{
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switch(nErrCode)
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{
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case 1:
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strMsg.Format(c_szErrInvalidPath, lpPath);
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break;
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case 2:
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default:
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strMsg.Format(c_szErrCreatePath, lpPath);
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break;
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}
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AfxMessageBox(strMsg, MB_OK|MB_ICONEXCLAMATION);
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}
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return iRet;
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}
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//return 0: no error
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//return 1: lpPath is invalid
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//return 2: lpPath can not be created(bValidate==FALSE)
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int CPathDialog::Touch(LPCTSTR lpPath, BOOL bValidate)
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{
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if(lpPath==NULL)
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{
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return 1;
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}
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TCHAR szPath[MAX_PATH];
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_tcscpy(szPath, lpPath);
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int nLen = _tcslen(szPath);
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int i;
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if(nLen==3)
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{
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if(!bValidate)
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{
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if(_access(szPath, 0)!=0)
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{
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return 2;
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}
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}
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return 0;
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}
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i = 3;
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BOOL bLastOne=TRUE;
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LPTSTR lpCurrentName;
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while(szPath[i]!=0)
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{
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lpCurrentName = &szPath[i];
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while( (szPath[i]!=0) && (szPath[i]!=_T('\\')) )
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{
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i++;
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}
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bLastOne =(szPath[i]==0);
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szPath[i] = 0;
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if(!bValidate)
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{
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CreateDirectory(szPath, NULL);
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if(_taccess(szPath, 0)!=0)
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{
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return 2;
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}
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}
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if(bLastOne)
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{
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break; //it's done
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}
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else
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{
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szPath[i] = _T('\\');
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}
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i++;
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}
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return (bLastOne?0:1);
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}
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//return 0: ok
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//return 1: error
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int CPathDialog::ConcatPath(LPTSTR lpRoot, LPCTSTR lpMorePath)
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{
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if(lpRoot==NULL)
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{
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return 1;
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}
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int nLen = _tcslen(lpRoot);
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if(nLen<3)
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{
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return 1;
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}
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if(lpMorePath==NULL)
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{
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return 0;
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}
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if(nLen==3)
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{
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_tcscat(lpRoot, lpMorePath);
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return 0;
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}
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_tcscat(lpRoot, _T("\\"));
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_tcscat(lpRoot, lpMorePath);
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return 0;
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}
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