主页 / 问题 / 1545589
Accepted
Djony Cooper
Asked:2023-10-13 15:47:53 +0800 CST2023-10-13 15:47:53 +0800 CST

单击按钮时更新 QGroupBox 中的内容

  • 772

我遇到了一个问题，我无法更新QGroupBox.
我想从Windows 中的标准图片文件夹接收所有图片，然后单击按钮，如果图片较多或较少，请在 中更新view，但启动时，updater该函数showImg会收到一个包含新图像的列表并将它们放入在列表内pix_dict，但不重绘小部件。

这是 PyQT5 中可重现的最小示例：

import fnmatch
import os
import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QWidget, QApplication, QLabel, QVBoxLayout, QGridLayout, QGroupBox, QScrollArea, QPushButton
from win32comext.shell import shell, shellcon


class Main(QWidget):
    def __init__(self):
        super().__init__()
        self.setMinimumSize(300, 300)
        self.setWindowTitle('Test')

        grid = QGridLayout()
        grid.addWidget(self.update_photo(), 0, 0, Qt.AlignCenter)
        grid.addWidget(self.showImg(), 1, 0, Qt.AlignCenter)
        grid.addWidget(self.test_widget_2(), 2, 0, Qt.AlignCenter)
        self.setLayout(grid)


    def update_photo(self):
        but = QPushButton('Обновить')
        but.setFixedSize(200, 50)
        but.clicked.connect(self.updater)
        return but

    def test_widget_2(self):
        but = QPushButton('test_but_2')
        but.setFixedSize(200, 50)
        return but

    def updater(self):
        self.showImg().close()
        self.showImg()

    def find(self, pattern, path):
        result = []
        for root, dirs, files in os.walk(path):
            for name in files:
                if fnmatch.fnmatch(name, pattern):
                    result.append(os.path.join(root, name))
        return result

    def showImg(self):
        path = shell.SHGetKnownFolderPath(shellcon.FOLDERID_Pictures)

        all_image = self.find('*.jpg', f'{path}')
        pix_dict = []
        for image in all_image:
            pxm = QPixmap(image)
            pix_dict.append(pxm)

        box = QGroupBox()
        box.setStyleSheet("border:0;")

        scr = QScrollArea(self)
        scr.setStyleSheet('height:0px; width:0px;')
        pnl = QWidget(self)

        vbox = QVBoxLayout(self)
        for image in list(reversed(pix_dict)):
            photo_label = QLabel()
            photo_label.setAlignment(Qt.AlignCenter)
            photo_label.setMaximumSize(200, 120)
            photo_label.setPixmap(image.scaled(photo_label.width(), photo_label.height(), Qt.KeepAspectRatio))

            vbox.addWidget(photo_label)

        pnl.setLayout(vbox)
        scr.setWidget(pnl)
        scr.setWidgetResizable(True)

        group_box_layout = QVBoxLayout()
        group_box_layout.addWidget(scr)
        box.setLayout(group_box_layout)
        return box

if __name__ == "__main__":
    App = QApplication(sys.argv)
    w = Main()
    w.show()
    sys.exit(App.exec())
python

1 个回答

  1. Best Answer

    尝试这个：

    import fnmatch
import os
import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
from PyQt5.QtWidgets import QWidget, QApplication, QLabel, QVBoxLayout, \
    QGridLayout, QGroupBox, QScrollArea, QPushButton
    
#from win32comext.shell import shell, shellcon


class Main(QWidget):
    def __init__(self):
        super().__init__()
        self.setMinimumSize(300, 300)
        self.setWindowTitle('Test')
        
# +++ vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
        self.box = QGroupBox()
        self.box.setStyleSheet("border: 0;")
        self.group_box_layout = QVBoxLayout(self.box)
 
        self.scr = QScrollArea(self)
        self.scr.setStyleSheet('height: 0px; width: 0px;') 
        self.scr.setWidgetResizable(True)
       
        self.showImg()
# +++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^     
        
        grid = QGridLayout()
        grid.addWidget(self.update_photo(), 0, 0, Qt.AlignCenter)
        
#        grid.addWidget(self.showImg(), 1, 0, Qt.AlignCenter)
        grid.addWidget(self.box, 1, 0, Qt.AlignCenter)                 # +++ self.box
        
        grid.addWidget(self.test_widget_2(), 2, 0, Qt.AlignCenter)
        self.setLayout(grid)

    def update_photo(self):
        but = QPushButton('Обновить')
        but.setFixedSize(200, 50)
        but.clicked.connect(self.updater)
        return but

    def test_widget_2(self):
        but = QPushButton('test_but_2')
        but.setFixedSize(200, 50)
        return but

    def updater(self):
#        self.showImg().close()
        self.showImg()

    def find(self, pattern, path):
        result = []
        for root, dirs, files in os.walk(path):
            for name in files:
                if fnmatch.fnmatch(name, pattern):
                    result.append(os.path.join(root, name))
        return result

    def showImg(self):
#       path = shell.SHGetKnownFolderPath(shellcon.FOLDERID_Pictures)
# +++           v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^
        path = 'D:/_Qt/__Qt/Test/testtest/test'                  # установите свой путь

        all_image = self.find('*.jpg', f'{path}')
        pix_dict = []
        for image in all_image:
            pxm = QPixmap(image)
            pix_dict.append(pxm)

#        box = QGroupBox()
#        self.box.setStyleSheet("border: 0;")
#        scr = QScrollArea(self)
#        scr.setStyleSheet('height: 0px; width: 0px;')
        pnl = QWidget() # self

#        vbox = QVBoxLayout(self)
        vbox = QVBoxLayout(pnl)                                        # !!! +++ 
        
        for image in list(reversed(pix_dict)):
            photo_label = QLabel()
            photo_label.setAlignment(Qt.AlignCenter)
            photo_label.setMaximumSize(200, 120)             
            photo_label.setPixmap(
                image.scaled(photo_label.width(), 
                photo_label.height(), 
                Qt.KeepAspectRatio))

            vbox.addWidget(photo_label)

#        pnl.setLayout(vbox)
        self.scr.setWidget(pnl)
#        scr.setWidgetResizable(True)
        
#                                      
#        group_box_layout = QVBoxLayout(self.box)
        self.group_box_layout.addWidget(self.scr)                     # !!! +++ 
        
#        box.setLayout(group_box_layout)
#        return box


if __name__ == "__main__":
    App = QApplication(sys.argv)
    w = Main()
    w.show()
    sys.exit(App.exec())

    在此输入图像描述 在此输入图像描述

    • 1

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