pygtk如何更新gtk.Image [英] pygtk how to update gtk.Image
问题描述
在创建窗口时创建图像并将其打包......当时我从磁盘加载图像。现在我开始从url下载图片,完成后我只想用新的图片替换现有的图片。我重写了磁盘上同一文件的内容,然后执行:
pixbuf = gtk.gdk.pixbuf_new_from_file(image_path)
self._user_avatar.set_from_pixbuf(pixbuf)
我试过
self._user_avatar.set_from_file( image_path)
和
self._user_avatar.clear()
无效。当我重新启动应用程序时,会有一个新的图像,并且一切正常。 解决方案
gtk.Image.set_from_pixbuf
是正确的方法,所以你的问题可能来自别的东西。尝试使用最简单的一段代码来重现您的问题。
以下是一个工作示例:
import pygtk
pygtk.require('2.0')
import gtk
pics = []
clicks = 0
def on_destroy(小工具):
gtk.main_quit()
返回False
def on_button_clicked(小工具,图片):
全局点击
点击+ = 1
image.set_from_pixbuf(图片[clicks%len(pics)])
def create():
window = gtk.Window(gtk.WINDOW_TOPLEVEL)
window.connect(destroy,on_destroy)
pics.append(gtk.gdk.pixbuf_new_from_file(sample1.png))
pics.append(gtk.gdk .pixbuf_new_from_file(sample2.png))
image = gtk.Image()
image.set_from_pixbuf(pics [0])
button = gtk。 Button(Switch Image)
button.connect(clicked,on_button_clicked,image)
vbox = gtk.VBox()
vbox.pack_start(image)
vbox.pa ck_start(button)
window.add(vbox)
window.show_all()
$ b $ if if __name__ ==__main__:
create()
gtk.main()
I have very strange problem with gtk.Image(). Simple question; how to update image? On window creation I create image and pack it… On that time I load image from disk. Now I start downloading image from url, and when it's done I just want to replace existing image with new one. I rewrite content of same file on disk and then do:
pixbuf = gtk.gdk.pixbuf_new_from_file(image_path)
self._user_avatar.set_from_pixbuf(pixbuf)
I have tried self._user_avatar.set_from_file(image_path) and self._user_avatar.clear() nothing works. When i restart app there is a new image and everything is ok.
gtk.Image.set_from_pixbuf
is the right method, so your problem may come from something else. Try on the most simple piece of code to reproduce your problem.
Here's a working sample:
import pygtk
pygtk.require('2.0')
import gtk
pics = []
clicks = 0
def on_destroy (widget):
gtk.main_quit()
return False
def on_button_clicked (widget, image):
global clicks
clicks += 1
image.set_from_pixbuf (pics[clicks % len(pics)])
def create ():
window = gtk.Window(gtk.WINDOW_TOPLEVEL)
window.connect("destroy", on_destroy)
pics.append (gtk.gdk.pixbuf_new_from_file("sample1.png"))
pics.append (gtk.gdk.pixbuf_new_from_file("sample2.png"))
image = gtk.Image()
image.set_from_pixbuf(pics[0])
button = gtk.Button ("Switch Image")
button.connect("clicked", on_button_clicked, image)
vbox = gtk.VBox()
vbox.pack_start (image)
vbox.pack_start (button)
window.add(vbox)
window.show_all()
if __name__ == "__main__":
create()
gtk.main()
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