__init__ 如何在 pyqt5 中显示像素图
How to show a pixmap in pyqt5 in __init__
我有一个简单的 Python 应用程序，它使用 PyQt5 执行更新。
目前，当我添加两个像素图和一个我想在计算期间更新其文本的 lineEdit 时，我直接陷入了 __init__。
每当我使用 main_window.change() 时，GUI 直到 change() 完成后才会显示。
图片未显示。
没有更改方法它显示的是图片
没有更改方法 GUI 正确显示
如果我将 QMessageBox 添加到 for 循环中，当然会显示消息，而且更新后的 GUI 也会变得可见。
消息框更新GUI
添加 self.update() 没有帮助。
class AcselStarter(QtWidgets.QMainWindow, Ui_ACSEL_Starter):
def __init__(self, parent=None):
super(AcselStarter, self).__init__(parent)
Ui_ACSEL_Starter.__init__(self)
self.setupUi(self)
pixmapAcsel = QPixmap('../fig/ACSEL.png')
self.labelAcsel.setPixmap(pixmapAcsel)
pixmapMubea = QPixmap('../fig/CAELogo_height60.png')
self.labelMubea.setPixmap(pixmapMubea)
self.lineEditProgress.setText(str(0.001))
def change(self):
for i in range(0, 100, 10):
self.lineEditProgress.setText(str(i))
# QtWidgets.QMessageBox.information(self, PROGRAMM_NAME, 'Replot', QtWidgets.QMessageBox.Ok)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
main_window = AcselStarter()
main_window.show()
time.sleep(5)
main_window.change()
sys.exit(app.exec_())
为了完整起见，这是我来自 Qt Designer 的 UI 文件：
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'UI_acsel_starter.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_ACSEL_Starter(object):
def setupUi(self, ACSEL_Starter):
ACSEL_Starter.setObjectName("ACSEL_Starter")
ACSEL_Starter.resize(320, 180)
self.centralwidget = QtWidgets.QWidget(ACSEL_Starter)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.widgetPics = QtWidgets.QWidget(self.centralwidget)
self.widgetPics.setObjectName("widgetPics")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.widgetPics)
self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.labelAcsel = QtWidgets.QLabel(self.widgetPics)
self.labelAcsel.setText("")
self.labelAcsel.setObjectName("labelAcsel")
self.horizontalLayout_2.addWidget(self.labelAcsel)
self.labelMubea = QtWidgets.QLabel(self.widgetPics)
self.labelMubea.setText("")
self.labelMubea.setObjectName("labelMubea")
self.horizontalLayout_2.addWidget(self.labelMubea)
self.gridLayout.addWidget(self.widgetPics, 0, 0, 1, 1)
self.widgetProgress = QtWidgets.QWidget(self.centralwidget)
self.widgetProgress.setMaximumSize(QtCore.QSize(16777215, 30))
self.widgetProgress.setObjectName("widgetProgress")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.widgetProgress)
self.horizontalLayout.setSizeConstraint(QtWidgets.QLayout.SetFixedSize)
self.horizontalLayout.setContentsMargins(0, 9, 0, 0)
self.horizontalLayout.setSpacing(6)
self.horizontalLayout.setObjectName("horizontalLayout")
self.labelProgress = QtWidgets.QLabel(self.widgetProgress)
self.labelProgress.setMaximumSize(QtCore.QSize(48, 16777215))
self.labelProgress.setObjectName("labelProgress")
self.horizontalLayout.addWidget(self.labelProgress)
self.lineEditProgress = QtWidgets.QLineEdit(self.widgetProgress)
self.lineEditProgress.setMaximumSize(QtCore.QSize(50, 16777215))
self.lineEditProgress.setObjectName("lineEditProgress")
self.horizontalLayout.addWidget(self.lineEditProgress)
self.labelPercent = QtWidgets.QLabel(self.widgetProgress)
self.labelPercent.setObjectName("labelPercent")
self.horizontalLayout.addWidget(self.labelPercent)
self.gridLayout.addWidget(self.widgetProgress, 1, 0, 1, 1)
ACSEL_Starter.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(ACSEL_Starter)
self.menubar.setGeometry(QtCore.QRect(0, 0, 320, 21))
self.menubar.setObjectName("menubar")
ACSEL_Starter.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(ACSEL_Starter)
self.statusbar.setObjectName("statusbar")
ACSEL_Starter.setStatusBar(self.statusbar)
self.retranslateUi(ACSEL_Starter)
QtCore.QMetaObject.connectSlotsByName(ACSEL_Starter)
def retranslateUi(self, ACSEL_Starter):
_translate = QtCore.QCoreApplication.translate
ACSEL_Starter.setWindowTitle(_translate("ACSEL_Starter", "ACSEL_Starter"))
self.labelProgress.setText(_translate("ACSEL_Starter", "Progress"))
self.labelPercent.setText(_translate("ACSEL_Starter", "%"))
我希望 GUI 在我为 lineEdit 设置新文本时得到更新。
提前感谢您的帮助！
我刚刚自己找到了一个解决方案，使用了更好的进度条而不是 lineEdit。
这是通过代码而不是 buttonClick 激活进度条时的解决方案。因为那时必须手动执行新线程。 buttonClick 在内部自动执行。
class ThreadClass(QThread):
valChanged = pyqtSignal(int)
def run(self):
print('run thread') # e.g. file download
count = 0
while count < 100:
count += 0.0005
self.valChanged.emit(count)
print('finished thread')
main_window.my_property = True
self.quit()
class AcselStarter_Thread(QtWidgets.QMainWindow, Ui_ACSEL_Starter):
"""
Activating the progress bar within the code without ButtonClick is not working.
"""
def __init__(self, parent=None):
super(AcselStarter_Thread, self).__init__(parent)
Ui_ACSEL_Starter.__init__(self)
self.setupUi(self)
pixmapAcsel = QPixmap('../fig/ACSEL.png')
self.labelAcsel.setPixmap(pixmapAcsel)
pixmapMubea = QPixmap('../fig/CAELogo_height60.png')
self.labelMubea.setPixmap(pixmapMubea)
self.progressBar.setMaximum(100)
self.progressBar.setValue(0)
self.__my_property = False
@property
def my_property(self):
return self.__my_property
@my_property.setter
def my_property(self, val):
self.__my_property = val
print('new val')
if self.__my_property:
self.do_something_after_progressbar()
def update_progressbar(self, val):
self.progressBar.setValue(val)
def do_thread(self):
# e.g. file update/download
print('do_thread')
self.threadClass = ThreadClass()
self.threadClass.valChanged.connect(self.update_progressbar)
self.threadClass.start()
def do_something_after_progressbar(self):
# e.g. moving the downloaded files and starting the updated app
print('do_something_after_progressbar')
if __name__ == '__main__':
"""
Main method. Starts the application
__name__ == '__main__' is true, if this file is run directly and not imported.
"""
app = QtWidgets.QApplication(sys.argv)
main_window = AcselStarter_Thread()
main_window.show()
main_window.do_thread()
sys.exit(app.exec_())
输出如下，如expected/wanted:
do_thread
run thread
finished thread
new val
do_something_after_progressbar
我有一个简单的 Python 应用程序，它使用 PyQt5 执行更新。
目前，当我添加两个像素图和一个我想在计算期间更新其文本的 lineEdit 时，我直接陷入了 __init__。
每当我使用 main_window.change() 时，GUI 直到 change() 完成后才会显示。
图片未显示。
没有更改方法它显示的是图片
没有更改方法 GUI 正确显示
如果我将 QMessageBox 添加到 for 循环中，当然会显示消息，而且更新后的 GUI 也会变得可见。
消息框更新GUI
添加 self.update() 没有帮助。
class AcselStarter(QtWidgets.QMainWindow, Ui_ACSEL_Starter):
def __init__(self, parent=None):
super(AcselStarter, self).__init__(parent)
Ui_ACSEL_Starter.__init__(self)
self.setupUi(self)
pixmapAcsel = QPixmap('../fig/ACSEL.png')
self.labelAcsel.setPixmap(pixmapAcsel)
pixmapMubea = QPixmap('../fig/CAELogo_height60.png')
self.labelMubea.setPixmap(pixmapMubea)
self.lineEditProgress.setText(str(0.001))
def change(self):
for i in range(0, 100, 10):
self.lineEditProgress.setText(str(i))
# QtWidgets.QMessageBox.information(self, PROGRAMM_NAME, 'Replot', QtWidgets.QMessageBox.Ok)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
main_window = AcselStarter()
main_window.show()
time.sleep(5)
main_window.change()
sys.exit(app.exec_())
为了完整起见，这是我来自 Qt Designer 的 UI 文件：
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'UI_acsel_starter.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_ACSEL_Starter(object):
def setupUi(self, ACSEL_Starter):
ACSEL_Starter.setObjectName("ACSEL_Starter")
ACSEL_Starter.resize(320, 180)
self.centralwidget = QtWidgets.QWidget(ACSEL_Starter)
self.centralwidget.setObjectName("centralwidget")
self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
self.gridLayout.setObjectName("gridLayout")
self.widgetPics = QtWidgets.QWidget(self.centralwidget)
self.widgetPics.setObjectName("widgetPics")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.widgetPics)
self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.labelAcsel = QtWidgets.QLabel(self.widgetPics)
self.labelAcsel.setText("")
self.labelAcsel.setObjectName("labelAcsel")
self.horizontalLayout_2.addWidget(self.labelAcsel)
self.labelMubea = QtWidgets.QLabel(self.widgetPics)
self.labelMubea.setText("")
self.labelMubea.setObjectName("labelMubea")
self.horizontalLayout_2.addWidget(self.labelMubea)
self.gridLayout.addWidget(self.widgetPics, 0, 0, 1, 1)
self.widgetProgress = QtWidgets.QWidget(self.centralwidget)
self.widgetProgress.setMaximumSize(QtCore.QSize(16777215, 30))
self.widgetProgress.setObjectName("widgetProgress")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.widgetProgress)
self.horizontalLayout.setSizeConstraint(QtWidgets.QLayout.SetFixedSize)
self.horizontalLayout.setContentsMargins(0, 9, 0, 0)
self.horizontalLayout.setSpacing(6)
self.horizontalLayout.setObjectName("horizontalLayout")
self.labelProgress = QtWidgets.QLabel(self.widgetProgress)
self.labelProgress.setMaximumSize(QtCore.QSize(48, 16777215))
self.labelProgress.setObjectName("labelProgress")
self.horizontalLayout.addWidget(self.labelProgress)
self.lineEditProgress = QtWidgets.QLineEdit(self.widgetProgress)
self.lineEditProgress.setMaximumSize(QtCore.QSize(50, 16777215))
self.lineEditProgress.setObjectName("lineEditProgress")
self.horizontalLayout.addWidget(self.lineEditProgress)
self.labelPercent = QtWidgets.QLabel(self.widgetProgress)
self.labelPercent.setObjectName("labelPercent")
self.horizontalLayout.addWidget(self.labelPercent)
self.gridLayout.addWidget(self.widgetProgress, 1, 0, 1, 1)
ACSEL_Starter.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(ACSEL_Starter)
self.menubar.setGeometry(QtCore.QRect(0, 0, 320, 21))
self.menubar.setObjectName("menubar")
ACSEL_Starter.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(ACSEL_Starter)
self.statusbar.setObjectName("statusbar")
ACSEL_Starter.setStatusBar(self.statusbar)
self.retranslateUi(ACSEL_Starter)
QtCore.QMetaObject.connectSlotsByName(ACSEL_Starter)
def retranslateUi(self, ACSEL_Starter):
_translate = QtCore.QCoreApplication.translate
ACSEL_Starter.setWindowTitle(_translate("ACSEL_Starter", "ACSEL_Starter"))
self.labelProgress.setText(_translate("ACSEL_Starter", "Progress"))
self.labelPercent.setText(_translate("ACSEL_Starter", "%"))
我希望 GUI 在我为 lineEdit 设置新文本时得到更新。
提前感谢您的帮助！
我刚刚自己找到了一个解决方案，使用了更好的进度条而不是 lineEdit。 这是通过代码而不是 buttonClick 激活进度条时的解决方案。因为那时必须手动执行新线程。 buttonClick 在内部自动执行。
class ThreadClass(QThread):
valChanged = pyqtSignal(int)
def run(self):
print('run thread') # e.g. file download
count = 0
while count < 100:
count += 0.0005
self.valChanged.emit(count)
print('finished thread')
main_window.my_property = True
self.quit()
class AcselStarter_Thread(QtWidgets.QMainWindow, Ui_ACSEL_Starter):
"""
Activating the progress bar within the code without ButtonClick is not working.
"""
def __init__(self, parent=None):
super(AcselStarter_Thread, self).__init__(parent)
Ui_ACSEL_Starter.__init__(self)
self.setupUi(self)
pixmapAcsel = QPixmap('../fig/ACSEL.png')
self.labelAcsel.setPixmap(pixmapAcsel)
pixmapMubea = QPixmap('../fig/CAELogo_height60.png')
self.labelMubea.setPixmap(pixmapMubea)
self.progressBar.setMaximum(100)
self.progressBar.setValue(0)
self.__my_property = False
@property
def my_property(self):
return self.__my_property
@my_property.setter
def my_property(self, val):
self.__my_property = val
print('new val')
if self.__my_property:
self.do_something_after_progressbar()
def update_progressbar(self, val):
self.progressBar.setValue(val)
def do_thread(self):
# e.g. file update/download
print('do_thread')
self.threadClass = ThreadClass()
self.threadClass.valChanged.connect(self.update_progressbar)
self.threadClass.start()
def do_something_after_progressbar(self):
# e.g. moving the downloaded files and starting the updated app
print('do_something_after_progressbar')
if __name__ == '__main__':
"""
Main method. Starts the application
__name__ == '__main__' is true, if this file is run directly and not imported.
"""
app = QtWidgets.QApplication(sys.argv)
main_window = AcselStarter_Thread()
main_window.show()
main_window.do_thread()
sys.exit(app.exec_())
输出如下，如expected/wanted:
do_thread
run thread
finished thread
new val
do_something_after_progressbar