browsedr.txt

动态提示控件

TdfsBrowseDirectoryDlg v2.62


Description:
  A dialog that displays the user's system in a heirarchial manner and
  allows a selection to be made.  It is a wrapper for SHBrowseForFolder(),
  which is rather messy to use directly.


Contact Information:
  The lateset version will always be available on the web at:
    http://www.delphifreestuff.com
  If you have any questions, comments or suggestions, please use the Delphi
  Free Stuff Support Forum at: 
    http://www.delphifreestuff.com/discus/
  If, for some reason, you can not use the web-based support forum, you can
  email me at [e-mail].  However, the support forum will
  always take precedence over direct email since it provides a resource that
  others can use when they have a problem.  Every message posted to the forum
  is emailed directly to this account, so emailing me directly will not get 
  your message to me any faster.  It will only make the message less important
  for me to respond to since only one person (you) is benefiting from it
  instead of everyone interested.  Having said all that, please do email me 
  directly if it is regarding something that isn't really support related, 
  i.e. just to say thanks (as novel as that idea is).  


Installation:
  Delphi 1:
    * This component is not compatible with Delphi 1.

  Delphi 2, C++Builder 1:
    * Select the 'Component | Install' menu item.
    * In the Install Components dialog, click the Add button.
    * In the Add Module dialog, enter the full path name of the component's
      registration unit (the unit that ends with 'Reg.pas', i.e.
      'BrowseDrReg.pas') and click OK.
    * In the Add Module dialog, click OK.
    * The component library will be rebuilt and a new tab named 'DFS' will be
      available on the Component Palette.

  Delphi 3, 4, 5, C++Builder 3 & 4:
    * Do one of the following:
      + Create a new package by selecting File | New and choosing Package from
        the New tab in the dialog.
      + Open an existing package file.  I suggest you do this if you already
        have a package that you like to use for small, third party components.
        I specifically have a package named "3rdParty.dpk" that I use for
        small components that come from other people.  Or, if you are using
        several of my components, you might create a "DFS.dpk" package and
        use it for all of my DFS components.
    * In the resulting package window, click the Add button.
    * In the Add dialog, on the Add Unit tab, enter the full path name of the
      component's registration unit (the unit that ends with 'Reg.pas', i.e.
      'BrowseDrReg.pas') and click OK.
    * You may want to add the other source files (*.pas) to the package as
      well in the same manner as you did the registration unit.  While this is
      not required, not doing it will cause compiler warnings when the package
      is compiled.  The component will function fine either way, but I
      personally find the warnings very irritating and am not happy until
      every compiler warning and hint is gone.
    * If this package is new, or it has never been installed, click the
      Install button in the package window.  If this package is already
      installed in Delphi, click the Compile button.

  C++Builder 5 and up:
    * Perform the "Delphi 3, 4, 5, C++Builder 3 & 4" steps above, except
      for the last step (Compile or Install).
    * Select the package the component has been added to, and choose
      Project | Edit Option Source to open the package options in the editor.
    * In the entry for PFLAGS, add the "-LUvcl50" option.  For example:
        <PFLAGS value="-$YD -$W -$O -v -JPHNE -M -LUvcl50"/>
    * Perform the final step from above, Compile or Install.
    * For Borland's official word on this situation, open the C++Builder help
      file and search the index for "dsgnintf.dcu" and see the "Compiling
      packages with DsgnIntf" section.

  Delphi 6 and up:
    * Perform the "Delphi 3, 4, 5, C++Builder 3 & 4" steps above, except
      for the last step (Compile or Install).
    * Add the DesignIDE package to the Requires list of the package into which
      the component is being installed.
    * Perform the final step from above, Compile or Install.
    * This is necessary because of changes to the design-time support units
      introduced in Delphi 6.  For complete information, see the Del6New.hlp
      file in your Delphi 6 Help directory.  In the index, search for
      "upgrade issues" and in the resulting list of topics, select the
      "DsgnIntf renamed and related changes" topic.

  Help File:
    Delphi 3:
      * Copy BrowseDr.Hlp to your Delphi\Help directory.
      * Edit the DELPHI3.CNT file and add the following line to the Index section:
          :Index TdfsBrowseDirectoryDlg =browsedr.hlp
      * Delete the hidden Delphi3.Gid file.
  
    Delphi 2:
      * Copy BrowseDr.Hlp and BrowseDr.Kwf to your Delphi\Help directory.
      * Use the HelpInst tool included with Delphi to install the BrowseDr.Kwf
        into Delphi\Bin\Delphi.Hdx file.
  

Notes:
  * If you are using C++Builder 1, you will get a compiler warning about the
    CSIDL_INTERNET identifier redefininiton not matching.  The problem is that
    it is defined in SHLOBJ.H but not in SHLOBJ.PAS, so I have to declare it.
    But, when Builder creates the HPP file for the unit, it defines that
    constant with "(byte)", whereas the SHLOBJ.H value has no explicit type.
    I have no idea how to convince Builder 1 that this constant should be a
    word, so you will either have to live with the compiler warning (it won't
    hurt anything) or edit the BROWSEDR.HPP file and fix the define by hand:

      #define CSIDL_INTERNET 0x0001

    This problem has been solved in Builder 3 by using the $EXTERNSYM
    compiler directive, but this is not supported in Builder 1.  If you know
    how to get it to stop generating this "(byte)" type into the HPP file,
    please email me.
  * If you attach code to the OnSelChanged event, you will need to add ShlObj
    to your uses clause (or MyShlObj -- see next note).
  * Requires Delphi 3 or Delphi v2.01's ShlObj unit.  If you don't have the
    2.01 update, you can get the equivalent using Pat Ritchey's ShellObj unit.
    It is freely available on his web site at
    http://ourworld.compuserve.com/homepages/PRitchey/
    If you use either 2.01's ShlObj or Pat's ShellObj unit, see the included
    ShellFix.Txt file for fixing bugs in them.  Delphi 3 has no known problems.


Known Issues:
  * Status text will not display computer names in network neighborhood.  I've
    tried everything I know, but I just can't figure out why it won't work.


Revision History:
 2.62   + Updated for Delphi 6 compatibility.  See updated install directions
          above.
        + Worked on some problems with the status text label.
 2.61   + Updated for C++Builder 5 compatibility.
 2.60   + Setting Selection property to an empty string ('') after the dialog
          had been displayed wouldn't clear the selection, so future executions
          would revert to the last selection.  It only worked if you gave it a
          specific directory, or if the dialog had never been displayed.
        + Added new flags for Options property:
           bfIncludeURLs: The browse dialog box can display URLs. The bfUseNewUI
             and bfIncludeFiles flags must also be set. If these three flags are
             not set, the browser dialog box will reject URLs. Even when these
             flags are set, the browse dialog box will only display URLs if the
             folder that contains the selected item supports them. When the
             folder's IShellFolder::GetAttributesOf method is called to request
             the selected item's attributes, the folder must set the
             SFGAO_FOLDER attribute flag. Otherwise, the browse dialog box will
             not display the URL.
           bfNewDialogStyle: Use the new user-interface. Setting this flag
             provides the user with a larger dialog box that can be resized. It
             has several new capabilities including: drag and drop capability
             within the dialog box, reordering, context menus, new folders,
             delete, and other context menu commands.
           bfShareable: The browse dialog box can display shareable resources on
             remote systems. It is intended for applications that want to expose
             remote shares on a local system. The bfUseNewUI flag must also be