python - 单击按钮上的 wxPython/ReportLab : How to create and open a . pdf 文件

Question

大家好，大约三天来，我一直在尽最大努力来解决这个问题!我有一个完美工作的 wxFrame 以及一个完美工作的 ReportLab pdf 脚本。分别参见下面的代码文件(注意:data1.py是GUI，而data2.py是运行的pdf脚本)。我的问题是:-1) 我希望 pdf 脚本仅在按下“保存到 PDF”按钮后运行2) 名称字段的值(存储在变量“NameString”中)应添加到生成的 pdf 文件中。

目前，如果我运行脚本(data2.py)，它会同时创建框架和 pdf 文件(不包括“NameString”)。这不是我想要的，我希望仅在单击/按“保存到 PDF”按钮后才能打开 pdf 并包含“NameString”。

预先感谢您的宝贵时间。

data1.py

class MyFrame1 ( wx.Frame ):

    def __init__( self, parent ):
        wx.Frame.__init__ ( self, parent, id = wx.ID_ANY, title = wx.EmptyString, pos = wx.DefaultPosition, size = wx.Size( 250,150 ), style = wx.CAPTION|wx.CLOSE_BOX|wx.MINIMIZE_BOX|wx.SYSTEM_MENU|wx.TAB_TRAVERSAL )

        self.SetSizeHintsSz( wx.DefaultSize, wx.DefaultSize )

        DataBox = wx.BoxSizer( wx.HORIZONTAL )

        gSizer2 = wx.GridSizer( 0, 2, 0, 0 )

        self.NameLabel = wx.StaticText( self, wx.ID_ANY, u"Name", wx.DefaultPosition, wx.DefaultSize, 0 )
        self.NameLabel.Wrap( -1 )
        self.NameLabel.SetFont( wx.Font( 13, 70, 90, 90, False, wx.EmptyString ) )

        gSizer2.Add( self.NameLabel, 0, wx.ALL, 5 )

        self.NameField = wx.TextCtrl( self, wx.ID_ANY, wx.EmptyString, wx.DefaultPosition, wx.DefaultSize, 0 )
        gSizer2.Add( self.NameField, 1, wx.ALL, 5 )

        self.SaveToPDF = wx.Button( self, wx.ID_ANY, u"Save To PDF", wx.DefaultPosition, wx.DefaultSize, 0 )
        gSizer2.Add( self.SaveToPDF, 0, wx.ALL, 5 )


        DataBox.Add( gSizer2, 0, wx.EXPAND|wx.ALIGN_CENTER_VERTICAL, 5 )


        self.SetSizer( DataBox )
        self.Layout()

        self.Centre( wx.BOTH )

        # Connect Events
        self.SaveToPDF.Bind( wx.EVT_BUTTON, self.SaveToPDF_Function )

    def __del__( self ):
        pass


    # Virtual event handlers, overide them in your derived class
    def SaveToPDF_Function( self, event ):
        event.Skip()

data2.py

#!/usr/bin/python
# -*- coding: utf-8 -*- 


import wx
from data1 import MyFrame1

from reportlab.pdfgen import canvas
from reportlab.lib.pagesizes import A3
from reportlab.lib.pagesizes import landscape

import os
import tempfile
import threading



class MyFrame2(MyFrame1):
    def __init__(self, parent):
        MyFrame1.__init__ (self, parent)



    def SaveToPDF_Function( self, event ):

        NameString = self.NameField.GetValue()
        print NameString




file_not_fount = "Selected file doesn't exist!"


class Launcher(threading.Thread):
    def __init__(self,path):
        threading.Thread.__init__(self)
        self.path = 'myFile.pdf'
    def run(self):
        self.open_file(self.path)



    def open_file(self,path):

        if os.path.exists(path):
            if os.name == 'posix':
                subprocess.call(["xdg-open", path])
                #os.popen("evince %s" % path)
            else:
                os.startfile(path)
        else:
            wx.MessageBox(self.file_not_fount,
                          self.title,
                          wx.OK|wx.ICON_INFORMATION)

# NameString = raw_input("Enter ur text: ")

c = canvas.Canvas("myFile.pdf", pagesize=landscape(A3))

c.drawCentredString(600, 800, 'I want this to open only after I clicked the “Save To PDF” button. Also, the text field value (NameString variable) should appear here =>'  + 'NameString' )

c.save()

Launcher('myFile.pdf').start()






app = wx.App(0)
MyFrame2(None).Show()
app.MainLoop()

Answer 1

这是我遇到的一个简单的工作解决方案，用于自动打开使用 ReportLab 生成的 pdf 文件。

照常导入子流程和 ReportLab 模块。然后将此函数链接到您的事件(代码的神奇部分是 subprocess.Popen......)

def SaveToPDF_Function( self, event ):

    NameString = self.NameField.GetValue()

    try:
        c = canvas.Canvas("myFile.pdf", pagesize=landscape(A3))

        c.drawCentredString(600, 800, 'OPENED... Welcome to ReportLab! This is my FIRST App...'  + NameString )

        c.save()

        subprocess.Popen(['myFile.pdf'], shell=True)

    except IOError:
        print 'The file is already OPENED!'

希望这对以后的搜索有所帮助。