9.14. File Selections
The file selection widget is a quick and simple way to display a File dialog box. It comes complete with Ok, Cancel, and Help buttons, a great way to cut down on programming time.To create a new file selection box use:
filesel = GtkFileSelection(title) |
To set the filename,
for example to bring up a specific directory, or give a default filename,
use this method:
filesel.set_filename(filename) |
To grab the filename
text that the user has entered or clicked on, use this method:
filename = filesel.get_filename() |
There are also references to the widgets
contained within the file selection widget. These are the filesel
attributes:
filesel.dir_list filesel.file_list filesel.selection_entry filesel.selection_text filesel.main_vbox filesel.ok_button filesel.cancel_button filesel.help_button |
Most likely you will want to use the ok_button, cancel_button, and help_button attributes to connect their widget signals to callbacks.
The filesel.py example program illustrates the use of the fileselection widget. As you will see, there is nothing much to creating a file selection widget. While in this example the Help button appears on the screen, it does nothing as there is not a signal attached to it. Figure 9.13 shows the resulting display:
Figure 9.13 File Selection Example
1 #!/usr/bin/env python
2
3 # example filesel.py
4
5 import gtk
6
7 class FileSelectionExample:
8 # Get the selected filename and print it to the console
9 def file_ok_sel(self, w):
10 print "%s" % self.filew.get_filename()
11
12 def destroy(self, widget):
13 gtk.mainquit()
14
15 def __init__(self):
16 # Create a new file selection widget
17 self.filew = gtk.GtkFileSelection("File selection")
18
19 self.filew.connect("destroy", self.destroy)
20 # Connect the ok_button to file_ok_sel method
21 self.filew.ok_button.connect("clicked", self.file_ok_sel)
22
23 # Connect the cancel_button to destroy the widget
24 self.filew.cancel_button.connect_object("clicked", self.filew.destroy,
25 self.filew)
26
27 # Lets set the filename, as if this were a save dialog,
28 # and we are giving a default filename
29 self.filew.set_filename("penguin.png")
30
31 self.filew.show()
32
33 def main():
34 gtk.mainloop()
35 return 0
36
37 if __name__ == "__main__":
38 FileSelectionExample()
39 main()
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