如何为列表中的每个元素创建一个按钮并将其放在滚动区域中? [英] How to create a button for each element in a list and put it in a scroll-area?

问题描述

我有一个列表，该列表每次用户打开文件时都会得到一个元素.每次将此文件追加到列表中时，我都需要使用文件名(列表中的元素)创建一个按钮，并将此按钮放入滚动区域.

I have a list which gets one element each time user opens a file. I need to create a button with the file's name (element from the list), each time this file is appended to a list, and put this button into a scroll-area.

问题是我总是只有一个按钮，只是更改了它的名称:

The problem is that I always have only one button, that just changes its name:

filenames = []
def addfiles():
    fileName = QtGui.QFileDialog.getOpenFileName()
    fileDirectory = unicode(fileName)  
    global filenames
    filenames.append(fileDirectory)
    button = QtGui.QPushButton(os.path.basename(fileDirectory))
    window.scrollArea.setWidget(button)

我知道问题是我在滚动区域中添加了相同的对象(按钮)，但是我不知道如何修复它.

I know that the problem is that I add the same object (button) to the scroll-area, but I don't know how to fix it.

推荐答案

问题不在于您添加了相同的按钮，而是您替换了scrollArea中的Widget.

The Problem is not that you add the same button, but that you sort of replace the Widget in the scrollArea.

比将按钮添加到布局中，更好的方法是创建QHBoxLayout并将其添加到布局中.

A better way would be to create a QHBoxLayout and than add the buttons to the layout.

filenames = []
lay = QtGui.QHboxLayout()
window.scrollArea.setLayout(lay)
def addfiles():
    fileName= QtGui.QFileDialog.getOpenFileName()
    fileDirectory = unicode(fileName)  
    global filenames
    filenames.append(fileDirectory)
    button = QtGui.QPushButton(os.path.basename(fileDirectory))
    lay.addWidget(button)

它应该以某种方式工作.这是一个小的工作示例:

In a sort of that way it should work. Here is a small working example:

from PyQt4 import QtGui
import sys

filenames = []

class TestGui(QtGui.QWidget):
    """ A Fast test gui show how to create buttons in a ScrollArea"""
    def __init__(self):
        super(TestGui, self).__init__()
        self.lay = QtGui.QHBoxLayout()
        self.sA = QtGui.QScrollArea()
        self.sA_lay = QtGui.QVBoxLayout()
        self.sA.setLayout(self.sA_lay)
        self.closeGui = QtGui.QPushButton("Close")
        self.add_file_button = QtGui.QPushButton("Add File")
        self.lay.addWidget(self.closeGui)
        self.lay.addWidget(self.add_file_button)
        self.lay.addWidget(self.sA)
        self.setLayout(self.lay)
        self.connect_()
        self.show()

    def connect_(self):
        self.add_file_button.clicked.connect(self.__add_file_to_list)
        self.closeGui.clicked.connect(self.close)
        return

    def __add_file_to_list(self):
        fname = QtGui.QFileDialog.getOpenFileName()
        global filenames
        filenames.append(fname)
        button = QtGui.QPushButton(fname)
        self.sA_lay.addWidget(button)
        return


if __name__ == '__main__':
     app = QtGui.QApplication(sys.argv)
     tg = TestGui()
     sys.exit(app.exec_())

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