--- Begin Message ---
Hi,
pachi (from #pygtk on GIMPNet) told me to shoot along an email over
here with some sample pygtk code for shaping windows (as there isn't
much out there about it). Attached is some code for shaping a window
into a rounded rectangle and (commented out) a circle, that I wrote. I
hope it helps you.
Natan Zohar
#!/usr/bin/env python
# A simple demonstration of using cairo to shape windows.
# Natan 'whatah' Zohar
import gtk
import math
class ShapedGUI:
def __init__(self):
self.window = gtk.Window()
self.window.show() # We show here so the window gets a border on it by the WM
x,y,w,h = self.window.get_allocation()
self.window.set_size_request(w,h)
self.window.connect('size-allocate', self.reshaperect)
# self.window.connect('size-allocate', self.reshapecircle)
self.window.show()
# Shape the window into a rounded rectangle
def reshaperect(self, obj, allocation):
w,h = allocation.width, allocation.height
bitmap = gtk.gdk.Pixmap(None, w, h, 1)
# Clear the bitmap
fg = gtk.gdk.Color(pixel=0)
bg = gtk.gdk.Color(pixel=-1)
fg_gc = bitmap.new_gc(foreground=fg, background=bg)
bitmap.draw_rectangle(fg_gc, True, 0, 0, w, h)
# Draw our shape into the pixmap using cairo
# Let's try drawing a rectangle with rounded edges.
padding=5 # Padding from the edges of the window
rounded=30 # How round to make the edges
cr = bitmap.cairo_create()
cr.set_source_rgb(0,0,0)
# Move to top corner
cr.move_to(0+padding+rounded, 0+padding)
# Top right corner and round the edge
cr.line_to(w-padding-rounded, 0+padding)
cr.arc(w-padding-rounded, 0+padding+rounded, rounded, math.pi/2, 0)
# Bottom right corner and round the edge
cr.line_to(w-padding, h-padding-rounded)
cr.arc(w-padding-rounded, h-padding-rounded, rounded, 0, math.pi/2)
# Bottom left corner and round the edge.
cr.line_to(0+padding+rounded, h-padding)
cr.arc(0+padding+rounded, h-padding-rounded, rounded, math.pi+math.pi/2, math.pi)
# Top left corner and round the edge
cr.line_to(0+padding, 0+padding+rounded)
cr.arc(0+padding+rounded, 0+padding+rounded, rounded, math.pi/2, 0)
# Fill in the shape.
cr.fill()
# Set the window shape
self.window.shape_combine_mask(bitmap, 0, 0)
self.window.show()
# Reshape the window into a circle
def reshapecircle(self, obj, allocation):
w,h = allocation.width, allocation.height
bitmap = gtk.gdk.Pixmap(None, w, h, 1)
# Clear the bitmap
fg = gtk.gdk.Color(pixel=0)
bg = gtk.gdk.Color(pixel=-1)
fg_gc = bitmap.new_gc(foreground=fg, background=bg)
bitmap.draw_rectangle(fg_gc, True, 0, 0, w, h)
# Draw our shape into the bitmap using cairo
cr = bitmap.cairo_create()
cr.set_source_rgb(0,0,0)
cr.arc(w/2,h/2,min(h,w)/2,0,2*math.pi)
cr.fill()
# Set the window shape
self.window.shape_combine_mask(bitmap, 0, 0)
self.window.show()
shapedWin = ShapedGUI()
gtk.main()
--- End Message ---
