Python for Bioinformatics: Instant Cocoa: Checkbook project 8

Thursday, October 15, 2009

Instant Cocoa: Checkbook project 8

Exporting a csv file, printing

Any respectable document-based application should allow the user to print. Just for fun, I added a toolbar (as described briefly here) and put in a print toolbar item. It turns out to be hooked up automatically. You just have to implement the function below in MyDocument. The current version doesn't handle page setup properly---I'll have to explore that further. The dictionary we get passed is empty.

The other code listing is to export a CSV (comma separated values) file, that could be imported into a spreadsheet. This is just like a standard file save for a non-document based application. It uses a block as the "completionHandler," which I also discussed briefly the other day.

- (NSPrintOperation *)printOperationWithSettings:
        (NSDictionary *)printSettings 
        error:(NSError **)outError {
    NSLog(@"print %@", printSettings);
    NSLog(@"window %@", [window contentView]);
    NSLog(@"content view %@", 
          [[window contentView] subviews]);
    NSLog(@"myScrollView subview %@ %@", 
          scrollView, [scrollView subviews]);
    NSLog(@"myTV %@", myTV);
 
    //printSettings 
    NSMutableDictionary *printAttrs;
    printAttrs = [NSMutableDictionary 
        dictionaryWithDictionary:printSettings];
    NSPrintInfo *pInfo;
    pInfo = [[NSPrintInfo alloc] 
        initWithDictionary:printAttrs];
    [pInfo setOrientation:NSPortraitOrientation];
    [pInfo setJobDisposition:NSPrintPreviewJob];
    [pInfo setHorizontalPagination:NSFitPagination];
    [pInfo setVerticallyCentered:NO];
    [pInfo setTopMargin:90];
    return [NSPrintOperation 
            printOperationWithView:scrollView
            printInfo:pInfo];
}

- (IBAction)exportCSV:(id)sender{
    NSLog(@"getFileToSave %@",[sender description]);
    NSSavePanel *savePanel = [NSSavePanel savePanel];
    [savePanel setRequiredFileType:@"csv"];
    
    [savePanel beginSheetModalForWindow:[NSApp mainWindow]
                      completionHandler:^(NSInteger result) {
                          if (result == NSOKButton) {
                              [savePanel orderOut:self];
                              [self application:NSApp 
                                    saveCSVFile:[savePanel filename]];
                          }
                      }];
}

- (BOOL)application:(NSApplication *)app 
        saveCSVFile:(NSString *)fn {
    theData = [myDocument checkbookItemsArray];
    [theData retain];
    //thePrefs = [myUISettings settings];
    //[thePrefs retain];
    mA = [NSMutableArray arrayWithCapacity:50];
    for (cbi in theData) {
        lineArray = [NSMutableArray arrayWithCapacity:5];
        
        date = [cbi date];
        NSLog(@"%@", [date description]);
        
        dateParts = [[date description] 
            componentsSeparatedByString:@" "];
        s = [dateParts objectAtIndex:0];
        NSLog(@"%@", s);
        [lineArray addObject:s];
        [lineArray addObject:@","];
        
        isDeposit = [[cbi isDeposit] boolValue];
        if (isDeposit) {
            [lineArray addObject:@" "];
        }
        else {
            [lineArray addObject:[cbi checkNumber]];
        }        
        [lineArray addObject:@","];
        [lineArray addObject:[cbi name]];
        [lineArray addObject:@","];
        [lineArray addObject:@"\n"];
        line = [lineArray componentsJoinedByString:@""];
        [mA addObject:line];
    }
    entry = [mA componentsJoinedByString:@""];
    NSLog(@"now, do the save %@", entry);
    
    NSError **e;
    [entry writeToFile:fn atomically:YES
              encoding:NSASCIIStringEncoding error:e];
    
    [theData release];
    //[thePrefs release];
    return YES;
}