Question

我正在尝试在wxPython中编写一个应用程序来显示来自亚马逊商店的一些项目（现在只有书籍封面为JPG）。我正在使用urllib2并在位图按钮上显示它们并列出它们以便进一步操作，但在编码之后，主窗口/应用程序似乎只在所有网址/图像被提取后加载。谷歌搜索我知道我们必须使用线程在应用程序主代码运行时中断操作，但这是我第一次使用wxpython尝试，我读过的所有示例都让我更加困惑。

我在下面提到了我正在为任何专家提供的代码，他们可以向我提供有关如何确保每个URL在读取时被提取和显示的想法...下面的代码是这里找到的各种示例的合并网络所以请原谅我缺乏技能..

import wx
import os
import sys
import urllib2
import cStringIO

urls = ['https://images-na.ssl-images-amazon.com/images/I/51-u3J3mtTL._AC_US100_.jpg',
        'https://images-na.ssl-images-amazon.com/images/I/51cRqX8DTgL._AC_US100_.jpg',
        'https://images-na.ssl-images-amazon.com/images/I/515iBchIIzL._AC_US100_.jpg',
        'https://images-na.ssl-images-amazon.com/images/I/511MaP7GeJL._AC_US100_.jpg',
        'https://images-na.ssl-images-amazon.com/images/I/51jizRmRYYL._AC_US160_.jpg']

class Example(wx.Frame):

    def __init__(self, *args, **kwargs):
        super(Example, self).__init__(*args, **kwargs) 
        self.InitUI()
        self.Ctrls()
        self.makeButtons()

    def makeButtons(self):

        i = 0

        for url in urls:

            f = urllib2.urlopen(url)
            data = f.read()

            i += 1
            print " url = ",url, "  ",i
            stream = cStringIO.StringIO(data)
            bmp = wx.BitmapFromImage( wx.ImageFromStream( stream ) )
            button = wx.Button(self.panel, -1, "Book cover", style=wx.ALIGN_CENTER, size=wx.Size(100,100))
            button.SetToolTipString("wx.Button can how have an icon on the left, right,\n"
                           "above or below the label.")
            button.SetBitmap(bmp,
                    wx.LEFT    # Left is the default, the image can be on the other sides too
                    #wx.RIGHT
                    #wx.TOP
                    #wx.BOTTOM
                    )
            button.SetBitmapMargins((4,4)) 
            button.SetFont(wx.Font(8, wx.SWISS, wx.NORMAL, wx.BOLD, False))
            self.wrapSizer.Add(button, 1, wx.EXPAND)
        self.Show(True)
        self.panel.Layout()

    def InitUI(self):
        self.SetSize((800, 400))
        self.SetTitle('Dynamically Flow Buttons to Next Row on Window-Resize')
        self.Centre()


    def Sizers(self):
        self.wrapSizer = wx.WrapSizer()
        self.panel.SetSizer(self.wrapSizer)

    def Ctrls(self):
        self.panel = wx.Panel(parent=self,pos=wx.Point(0,0), size=wx.Size(750,550), style=wx.TAB_TRAVERSAL)
        self.Sizers()

def main():

    ex = wx.App()
    Example(None)
    ex.MainLoop()

if __name__ == '__main__':
    main()

Answer 1

你应该使用线程来获取url，然后使用wx.CallAfter返回主线程来显示数据......以下是你的代码的更改方式

import threading

def makeButtons(self):


    def _update_data(data):

        stream = cStringIO.StringIO(data)
        bmp = wx.BitmapFromImage( wx.ImageFromStream( stream ) )
        button = wx.Button(self.panel, -1, "Book cover", style=wx.ALIGN_CENTER, size=wx.Size(100,100))
        button.SetToolTipString("wx.Button can how have an icon on the left, right,\n"
                       "above or below the label.")
        button.SetBitmap(bmp,
                wx.LEFT    # Left is the default, the image can be on the other sides too
                #wx.RIGHT
                #wx.TOP
                #wx.BOTTOM
                )
        button.SetBitmapMargins((4,4)) 
        button.SetFont(wx.Font(8, wx.SWISS, wx.NORMAL, wx.BOLD, False))
        self.wrapSizer.Add(button, 1, wx.EXPAND)
        self.Show(True)
        self.panel.Layout()

    def f():
        f = urllib2.urlopen(url)
        data = f.read()
        wx.CallAfter(_update_data, data)

    for url in urls:
        threading.Thread(target=f).start()

wxPython获取远程图像和线程

1 个答案: