Dialogs

CommonDialogues.mm

#import "OpenFile.h"
#if __APPLE__
    #include <AppKit/AppKit.h>
#endif

/*
    #ifndef FileOpen_OpenFile_h
    #define FileOpen_OpenFile_h

    #include <string>
    #include <vector>

    std::vector<std::string> OpenFile(bool multiple = false, std::vector<std::string>* extensions = 0);

    #endif
*/

std::vector<std::string> OpenFile(bool multiple, std::vector<std::string>* extensions) {
    std::vector<std::string> result;
#if __APPLE__ // Link to: AppKit
    // http://cyborgdino.com/2012/02/nsopenpanel-displaying-a-file-open-dialog-in-os-x-10-7/
    // http://iosdevelopertips.com/c/converting-between-c-and-objective-c-strings.html
    // http://stackoverflow.com/questions/2335151/how-can-i-create-an-empty-array-in-objective-c-and-assign-value-into-it-one-by
    // Create a File Open Dialog class.
    
    NSOpenPanel* openDlg = [NSOpenPanel openPanel];
    if (extensions != 0) { // Set array of file types
        NSMutableArray *fileTypesArray = [NSMutableArray array];
        for (int i = 0; i < extensions->size(); ++i)
            [fileTypesArray addObject: [NSString stringWithCString:extensions->at(i).c_str() encoding:NSUTF8StringEncoding]];
        [openDlg setAllowedFileTypes:fileTypesArray];
    }
    
    [openDlg setCanChooseFiles:YES];
    if (multiple)
        [openDlg setAllowsMultipleSelection:TRUE];
    else
        [openDlg setAllowsMultipleSelection:FALSE];

    
    if ( [openDlg runModal] == NSOKButton ) {
        NSArray *files = [openDlg URLs];

        for(int i = 0; i < [files count]; i++ ) {
            NSString *str = [[files objectAtIndex:i] path];
            const char *ptr = [str cStringUsingEncoding:NSUTF8StringEncoding];
            result.push_back(ptr);
        }
    }
#endif
    return result;
}