Python for Bioinformatics: Dynamic Table View

Saturday, July 26, 2008

Dynamic Table View

Here is a simple kind of editable Table View. The NSTableView itself (actually, the NSTableColumn) does not have editing enabled. Instead, we provide a text box and a + button to allow editing. We check to see if a row is selected, and add the new text after that row.

I've put the code for the Controller in a separate class. The class is instantiated with a blue cube in the nib and outlets and actions are wired up in the usual way. (Don't forget to import it in the App Delegate file). Here is the code:

class MyTVController(NSObject):
    tv = objc.IBOutlet()
    tf = objc.IBOutlet()
    addButton = objc.IBOutlet()
    deleteButton = objc.IBOutlet()
    
    def awakeFromNib(self):
        self.L = ['John','Paul','George','Ringo']
        self.tv.setDelegate_(self)
        self.tv.setDataSource_(self)
        self.tv.reloadData()
    
    @objc.IBAction
    def add_(self,sender):
        value = self.tf.stringValue()
        NSLog("add_ %s" % value)
        i = self.tv.selectedRow()
        if i == -1:  self.L.append(value)
        else:        self.L.insert(i+1,value)
        self.tv.reloadData()
    
    @objc.IBAction
    def delete_(self,sender):
        NSLog("delete_")

    def numberOfRowsInTableView_(self,tv):
        return len(self.L)
    
    def tableView_objectValueForTableColumn_row_(
                    self,tv,tc,r):
        return self.L[r]