Objective-c – Open File Dialog Box

dialoggnustepobjective copenfiledialoguser interface

I'm learning Objective-C and trying to develop a simple zipper application, but I stopped when now, when I need to insert a button at my dialog and this button opens a Open File Dialog that will select a file to compress, but I never used a Open File Dialog, then how I can open it and store the user selected file in a char*? Thanks.

Remember that I'm using GNUstep(Linux).

Best Answer

Thanks @Vlad the Impala I am updating your answers for people who use OS X v10.6+

// Create the File Open Dialog class.
NSOpenPanel* openDlg = [NSOpenPanel openPanel];

// Enable the selection of files in the dialog.
[openDlg setCanChooseFiles:YES];

// Multiple files not allowed
[openDlg setAllowsMultipleSelection:NO];

// Can't select a directory
[openDlg setCanChooseDirectories:NO];

// Display the dialog. If the OK button was pressed,
// process the files.
if ( [openDlg runModal] == NSOKButton )
{
    // Get an array containing the full filenames of all
    // files and directories selected.
    NSArray* urls = [openDlg URLs];

    // Loop through all the files and process them.
    for(int i = 0; i < [urls count]; i++ )
    {
        NSString* url = [urls objectAtIndex:i];
        NSLog(@"Url: %@", url);
    }
}

Related Solutions

Objective-c – Zipping Things Using Objective-C

You could reference the accepted answer to "How can I create a zip file by using Objective-C?", or
Objective-C is a superset of C, so you can freely link to whatever C zip library is convenient for you (such as zlib), or
You can call out to the zip and unzip shell utilities available on your Linux system and interact with them using pipes or temporary locations for the files.

Wpf – Open directory dialog

You can use the built-in FolderBrowserDialog class for this. Don't mind that it's in the System.Windows.Forms namespace.

using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
{
    System.Windows.Forms.DialogResult result = dialog.ShowDialog();
}

If you want the window to be modal over some WPF window, see the question How to use a FolderBrowserDialog from a WPF application.

EDIT: If you want something a bit more fancy than the plain, ugly Windows Forms FolderBrowserDialog, there are some alternatives that allow you to use the Vista dialog instead:

Third-party libraries, such as Ookii dialogs (.NET 4.5+)

The Windows API Code Pack-Shell:

  using Microsoft.WindowsAPICodePack.Dialogs;

  ...

  var dialog = new CommonOpenFileDialog();
  dialog.IsFolderPicker = true;
  CommonFileDialogResult result = dialog.ShowDialog();

Note that this dialog is not available on operating systems older than Windows Vista, so be sure to check CommonFileDialog.IsPlatformSupported first.

Best Answer

Related Solutions

Objective-c – Zipping Things Using Objective-C

Wpf – Open directory dialog

Related Topic