如何使用PyGTK和PyCairo在窗口中获得透明背景？
我一直在努力使用PyGTK创建一个没有装饰和透明背景的窗口。然后我会用开罗绘制窗口的内容。但我无法让它发挥作用。
我尝试了很多不同的方法，它们都失败了，这就是其中之一
#!/usr/bin/env python
import pygtk
pygtk.require('2.0')
import gtk, sys, cairo
win = None
def expose (widget, event):
cr = widget.window.cairo_create()
#Start drawing
cr.set_operator(cairo.OPERATOR_CLEAR)
cr.set_source_rgba(0.5,1.0,0.0,0.5)
cr.rectangle(0, 0, 0.9, 0.8)
cr.fill()
def main (argc):
global win
win = gtk.Window()
win.set_decorated(False)
win.connect('delete_event', gtk.main_quit)
win.connect('expose-event', expose)
win.set_app_paintable(True)
win.show()
gtk.main()
if __name__ == '__main__':
sys.exit(main(sys.argv))
没有找到相关结果
已邀请:
2 个回复
壬驴拿歪竞
#!/usr/bin/env python import pygtk pygtk.require('2.0') import gtk, sys, cairo from math import pi def expose (widget, event): cr = widget.window.cairo_create() # Sets the operator to clear which deletes everything below where an object is drawn cr.set_operator(cairo.OPERATOR_CLEAR) # Makes the mask fill the entire window cr.rectangle(0.0, 0.0, *widget.get_size()) # Deletes everything in the window (since the compositing operator is clear and mask fills the entire window cr.fill() # Set the compositing operator back to the default cr.set_operator(cairo.OPERATOR_OVER) # Draw a fancy little circle for demonstration purpose cr.set_source_rgba(0.5,1.0,0.0,1) cr.arc(widget.get_size()[0]/2,widget.get_size()[1]/2, widget.get_size()[0]/2,0,pi*2) cr.fill() def main (argc): win = gtk.Window() win.set_decorated(False) # Makes the window paintable, so we can draw directly on it win.set_app_paintable(True) win.set_size_request(100, 100) # This sets the windows colormap, so it supports transparency. # This will only work if the wm support alpha channel screen = win.get_screen() rgba = screen.get_rgba_colormap() win.set_colormap(rgba) win.connect('expose-event', expose) win.show()佩疵瓦