PyGTK - ButtonBox Class
The ButtonBox class in gtk API serves as a base class for containers to hold multiple buttons either horizontally or vertically. Two subclasses HButtonBox and VButtonBox are derived from the ButtonBox class, which itself is a subclass of gtk.Box class.
A button box is used to provide a consistent layout of buttons throughout an application. It provides one default layout and a default spacing value that are persistent across all widgets.
The set_spacing() method of the gtk.Box class can be used to change the default spacing between buttons in the button box.
The default layout of buttons can be changed by the set_default() method. The possible values of the button layout are −
- gtk.BUTTONBOX_SPREAD
- gtk.BUTTONBOX_EDGE
- gtk.BUTTONBOX_START
- gtk.BUTTONBOX_END.
Example
In the following example, a VBox object inside the toplevel window internally contains one VButtonBox object and one HButtonBox object, each containing two buttons, arranged vertically and horizontally respectively.
Observe the code −
import gtk class PyApp(gtk.Window): def __init__(self): super(PyApp, self).__init__() self.set_title("Button Box demo") self.set_size_request(200,100) self.set_position(gtk.WIN_POS_CENTER) vb = gtk.VBox() box1 = gtk.VButtonBox() btn1 = gtk.Button(stock = gtk.STOCK_OK) btn2 = gtk.Button(stock = gtk.STOCK_CANCEL) box1.pack_start(btn1, True, True, 0) box1.pack_start(btn2, True, True, 0) box1.set_border_width(5) vb.add(box1) box2 = gtk.HButtonBox() btn3 = gtk.Button(stock = gtk.STOCK_OK) btn4 = gtk.Button(stock = gtk.STOCK_CANCEL) ent = gtk.Entry() box2.pack_start(btn3, True, True, 0) box2.pack_start(btn4, True, True, 0) box1.set_border_width(5) vb.add(box2) self.add(vb) self.show_all() PyApp() gtk.main()
The above code generates the following output −
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