PyGTK - Arrow Class


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The gtk.Arrow object is used to draw simple arrow pointing towards four cardinal directions. This class is inherited from the gtk.Misc class and the object will occupy any space allocated it, for instance, a Label or Button widget.

Typically, Arrow object is created using the following constructor −

Arr = gtk.Arrow(arrow_type, shadow_type)

The predefined arrow_type constants are −

  • gtk.ARROW_UP
  • gtk.ARROW_DOWN
  • gtk.ARROW_LEFT
  • gtk.ARROW_RIGHT

The predefined shadow_type constants are listed in the following table −

gtk.SHADOW_NONE No outline.
gtk.SHADOW_IN The outline is beveled inward.
gtk.SHADOW_OUT The outline is beveled outward like a button.
gtk.SHADOW_ETCHED_IN The outline itself is an inward bevel, but the frame bevels outward.
gtk.SHADOW_ETCHED_OUT The outline is an outward bevel, frame bevels inward.

Example

In the following example, four Button widgets are added to an Hbox. On top of each button, a gtk.Arrow object pointing UP, DOWN, LEFT and RIGHT respectively is placed. The HBOX container is placed at the bottom of the toplevel window with the help of an Alignment container.

Observe the code −

import gtk

class PyApp(gtk.Window):
   
   def __init__(self):
      super(PyApp, self).__init__()
      self.set_title("Arrow Demo")
      self.set_size_request(300, 200)
      self.set_position(gtk.WIN_POS_CENTER)
		
      vbox = gtk.VBox(False, 5)
      hbox = gtk.HBox(True, 3)
      valign = gtk.Alignment(0, 1, 0, 0)
      vbox.pack_start(valign)
		
      arr1 = gtk.Arrow(gtk.ARROW_UP, gtk.SHADOW_NONE)
      arr2 = gtk.Arrow(gtk.ARROW_DOWN, gtk.SHADOW_NONE)
      arr3 = gtk.Arrow(gtk.ARROW_LEFT, gtk.SHADOW_NONE)
      arr4 = gtk.Arrow(gtk.ARROW_RIGHT, gtk.SHADOW_NONE)
		
      btn1 = gtk.Button()
      btn1.add(arr1)
      btn2 = gtk.Button()
      btn2.add(arr2)
      btn3 = gtk.Button()
      btn3.add(arr3)
      btn4 = gtk.Button()
      btn4.add(arr4)
		
      hbox.add(btn1)
      hbox.add(btn2)
      hbox.add(btn3)
      hbox.add(btn4)
		
      halign = gtk.Alignment(0.5, 0.5, 0, 0)
      halign.add(hbox)
		
      vbox.pack_start(halign, False, True, 10)
      self.add(vbox)
      self.connect("destroy", gtk.main_quit)
      self.show_all()

PyApp()
gtk.main()

The above code will generate the following output −

Arrow Demo

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