PyQt - PyQtGraph -> QWidget：必须在 QPaintDevice 之前构造一个 QApplication
PyQt - PyQtGraph -> QWidget: Must construct a QApplication before a QPaintDevice
目前正在尝试创建一个嵌入 PyQtGraph 图的 PyQt5 应用程序，
我已经在我的概念验证中做到了，现在尝试升级它。
我使用 GraphicsLayoutWidget 将我的图表嵌入 PyQt
但我有一条错误消息：
QWidget: Must construct a QApplication before a QPaintDevice. So i read about it, and it seem that my QApplication isn't created.
但我不明白，我有我的 mainWindow 运行 并且我尝试在按钮单击事件上添加 GraphicsLayoutWidget 所以我不明白为什么它没有'没用。
这个样本是运行良好的 POC
if __name__ == "__main__":
# set default pyqtgraph color
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
global LeftPanelContent
LeftPanelContent = QtWidgets.QFrame()
LeftPanelContent.setMinimumSize(QtCore.QSize(200, 0))
LeftPanelContent.setMaximumSize(QtCore.QSize(200, 16777215))
LeftPanelContent.setObjectName("LeftPanelContent")
global PanelInfoPatient
PanelInfoPatient = QtWidgets.QFrame()
PanelInfoPatient.setMinimumSize(QtCore.QSize(250, 0))
PanelInfoPatient.setMaximumSize(QtCore.QSize(350, 16777215))
PanelInfoPatient.setObjectName("PanelInfoPatient")
#ui3 = Ui_MiddlePanel()
#ui3.setupUi(PanelInfoPatient)
ui3 = Ui_Form()
ui3.setupUi(PanelInfoPatient)
ui3.ButtonUpdate.clicked.connect(onUpdatePatientClicked)
ui3.ButtonDelete.clicked.connect(onDeletePatientClicked)
ui2 = Ui_LeftPanelContent()
ui2.setupUi(LeftPanelContent)
ui2.ButtonOrganisation.clicked.connect(showRightPanelCollapsible)
ui2.HideButton.clicked.connect(hideLeftPanels)
PanelRight = QtWidgets.QFrame()
PanelRight.setMinimumSize(QtCore.QSize(700, 0))
PanelRight.setObjectName("PanelRight")
ui4 = Ui_RightPanel()
ui4.setupUi(PanelRight)
ui4.widget_2 = pg.GraphicsLayoutWidget();
ui4.verticalLayout.addWidget(ui4.widget_2)
ui4.ButtonEvent.clicked.connect(onEventClicked);
ui4.ButtonDay.clicked.connect(onDayClicked);
ui4.ButtonWeek.clicked.connect(onWeekClicked);
ui4.ButtonMonth.clicked.connect(onMonthClicked);
ui4.widget_2.hide()
ui.gridLayout_2.addWidget(LeftPanelContent, 0, 0, 1, 1)
ui.gridLayout_2.addWidget(PanelInfoPatient, 0, 1, 1, 1)
ui.gridLayout_2.addWidget(PanelRight, 0, 2, 1, 1)
setMainWindowColor()
#MainWindow.setWindowFlags(QtCore.Qt.FramelessWindowHint)
MainWindow.show()
sys.exit(app.exec_())
现在新的实现：
Launcher.py :
def launchApp(app):
appController = ApplicationController()
appController.showMainWindow()
return app.exec_()
if __name__ == '__main__':
app = QtWidgets.QApplication([])
setLangage()
result = launchApp(app)
sys.exit(result)
主窗口视图：
class MainWindow(QMainWindow, Ui_MainWindow, IMainWindows):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.LeftPanelContent = None
self.PanelInfoPatient = None
self.PanelRight = None
self.collaspedLeftPanel = None
self.leftPanelUi = None
self.panelInfoPatientUi = None
self.rightPanelUi = None
self.collaspedLeftPanelUi = None
self.dialog = None
self.lastDir = None
def guiAssemblage(self):
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
self.LeftPanelContent = QtWidgets.QFrame()
self.LeftPanelContent.setMinimumSize(QtCore.QSize(200, 0))
self.LeftPanelContent.setMaximumSize(QtCore.QSize(200, 16777215))
self.LeftPanelContent.setObjectName("LeftPanelContent")
self.PanelInfoPatient = QtWidgets.QFrame()
self.PanelInfoPatient.setMinimumSize(QtCore.QSize(250, 0))
self.PanelInfoPatient.setMaximumSize(QtCore.QSize(350, 16777215))
self.PanelInfoPatient.setObjectName("PanelInfoPatient")
self.PanelRight = QtWidgets.QFrame()
self.PanelRight.setMinimumSize(QtCore.QSize(700, 0))
self.PanelRight.setObjectName("PanelRight")
self.collaspedLeftPanel = QtWidgets.QFrame()
self.collaspedLeftPanel.setMinimumSize(QtCore.QSize(75, 0))
self.collaspedLeftPanel.setMaximumSize(QtCore.QSize(75, 16777215))
self.collaspedLeftPanel.setObjectName("collaspedLeftPanel")
self.leftPanelUi = Ui_LeftPanelContent()
self.leftPanelUi.setupUi(self.LeftPanelContent)
self.panelInfoPatientUi = Ui_Form()
self.panelInfoPatientUi.setupUi(self.PanelInfoPatient)
self.rightPanelUi = Ui_RightPanel()
self.rightPanelUi.setupUi(self.PanelRight)
self.collaspedLeftPanelUi = Ui_LeftPanelCollapsed()
self.collaspedLeftPanelUi.setupUi(self.collaspedLeftPanel)
self.gridLayout_2.addWidget(self.LeftPanelContent, 0, 0, 1, 1)
self.gridLayout_2.addWidget(self.PanelInfoPatient, 0, 1, 1, 1)
self.gridLayout_2.addWidget(self.PanelRight, 0, 2, 1, 1)
self.dialog = QDialog()
self.dialog.ui = Ui_popupDelete()
self.dialog.ui.setupUi(self.dialog)
self.dialog.setWindowTitle("Suppresion patient")
控制器：
class MainWindowController(object):
def __init__(self, appController):
self.appController = appController
self.model = None
self.view = None
def run(self):
self.view = MainWindow()
self.view.show()
self.view.guiAssemblage()
self.connectSignals()
def createPlot(self):
self.view.rightPanelUi.ContentRightPanel = pg.GraphicsLayoutWidget();
self.view.rightPanelUi.verticalLayout.addWidget(self.view.rightPanelUi.ContentRightPanel)
self.view.rightPanelUi.ContentRightPanel.hide()
def connectSignals(self):
self.view.leftPanelUi.HideButton.clicked.connect(self.onHideLeftPanelClicked)
self.view.panelInfoPatientUi.ButtonUpdate.clicked.connect(self.onUpdatePatientClicked)
self.view.panelInfoPatientUi.ButtonDelete.clicked.connect(self.onDeletePatientClicked)
self.view.rightPanelUi.ButtonEvent.clicked.connect(self.onEventClicked);
self.view.rightPanelUi.ButtonDay.clicked.connect(self.onDayClicked);
self.view.rightPanelUi.ButtonWeek.clicked.connect(self.onWeekClicked);
self.view.rightPanelUi.ButtonMonth.clicked.connect(self.onMonthClicked);
我也尝试在 guiAssemblage 方法中创建 GraphicsLayoutWidget 但我有同样的错误
请问我错过了什么？
所以我解决了我的问题。
我的 pyqtgraph 不是最新的。
不要使用不是最新的 PyPy 包。
我升级了 numpy，然后下载并用 GitHub 来源替换了我的 pyqtgraph 模块。
我还从我的计算机中删除了 PyQt5/PyQt4 和 PySide，然后重新安装 PyQt5
我尝试了几个解决方案直到这个堆栈：
C:\Users\Nicolas\Desktop\GitRepository\e-servicing\src (master)
λ pip install --upgrade pyqtgraph
Requirement already up-to-date: pyqtgraph in c:\python34\lib\site-packages
Requirement already up-to-date: numpy in c:\python34\lib\site-packages (from pyqtgraph)
C:\Users\Nicolas\Desktop\GitRepository\e-servicing\src (master)
λ python launcher.py
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 25, in <module>
import PyQt4
ImportError: No module named 'PyQt4'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 29, in <module>
import PySide
ImportError: No module named 'PySide'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "launcher.py", line 9, in <module>
import pyqtgraph as pg;
File "C:\Python34\lib\site-packages\pyqtgraph\__init__.py", line 13, in <module>
from .Qt import QtGui
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 32, in <module>
raise Exception("PyQtGraph requires either PyQt4 or PySide; neither package could be imported.")
Exception: PyQtGraph requires either PyQt4 or PySide; neither package could be imported.
只需从 github 获取 PyQtGraph 源
成功了。
目前正在尝试创建一个嵌入 PyQtGraph 图的 PyQt5 应用程序，
我已经在我的概念验证中做到了，现在尝试升级它。
我使用 GraphicsLayoutWidget 将我的图表嵌入 PyQt
但我有一条错误消息：
QWidget: Must construct a QApplication before a QPaintDevice. So i read about it, and it seem that my QApplication isn't created.
但我不明白，我有我的 mainWindow 运行 并且我尝试在按钮单击事件上添加 GraphicsLayoutWidget 所以我不明白为什么它没有'没用。
这个样本是运行良好的 POC
if __name__ == "__main__":
# set default pyqtgraph color
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
global LeftPanelContent
LeftPanelContent = QtWidgets.QFrame()
LeftPanelContent.setMinimumSize(QtCore.QSize(200, 0))
LeftPanelContent.setMaximumSize(QtCore.QSize(200, 16777215))
LeftPanelContent.setObjectName("LeftPanelContent")
global PanelInfoPatient
PanelInfoPatient = QtWidgets.QFrame()
PanelInfoPatient.setMinimumSize(QtCore.QSize(250, 0))
PanelInfoPatient.setMaximumSize(QtCore.QSize(350, 16777215))
PanelInfoPatient.setObjectName("PanelInfoPatient")
#ui3 = Ui_MiddlePanel()
#ui3.setupUi(PanelInfoPatient)
ui3 = Ui_Form()
ui3.setupUi(PanelInfoPatient)
ui3.ButtonUpdate.clicked.connect(onUpdatePatientClicked)
ui3.ButtonDelete.clicked.connect(onDeletePatientClicked)
ui2 = Ui_LeftPanelContent()
ui2.setupUi(LeftPanelContent)
ui2.ButtonOrganisation.clicked.connect(showRightPanelCollapsible)
ui2.HideButton.clicked.connect(hideLeftPanels)
PanelRight = QtWidgets.QFrame()
PanelRight.setMinimumSize(QtCore.QSize(700, 0))
PanelRight.setObjectName("PanelRight")
ui4 = Ui_RightPanel()
ui4.setupUi(PanelRight)
ui4.widget_2 = pg.GraphicsLayoutWidget();
ui4.verticalLayout.addWidget(ui4.widget_2)
ui4.ButtonEvent.clicked.connect(onEventClicked);
ui4.ButtonDay.clicked.connect(onDayClicked);
ui4.ButtonWeek.clicked.connect(onWeekClicked);
ui4.ButtonMonth.clicked.connect(onMonthClicked);
ui4.widget_2.hide()
ui.gridLayout_2.addWidget(LeftPanelContent, 0, 0, 1, 1)
ui.gridLayout_2.addWidget(PanelInfoPatient, 0, 1, 1, 1)
ui.gridLayout_2.addWidget(PanelRight, 0, 2, 1, 1)
setMainWindowColor()
#MainWindow.setWindowFlags(QtCore.Qt.FramelessWindowHint)
MainWindow.show()
sys.exit(app.exec_())
现在新的实现：
Launcher.py :
def launchApp(app):
appController = ApplicationController()
appController.showMainWindow()
return app.exec_()
if __name__ == '__main__':
app = QtWidgets.QApplication([])
setLangage()
result = launchApp(app)
sys.exit(result)
主窗口视图：
class MainWindow(QMainWindow, Ui_MainWindow, IMainWindows):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self.LeftPanelContent = None
self.PanelInfoPatient = None
self.PanelRight = None
self.collaspedLeftPanel = None
self.leftPanelUi = None
self.panelInfoPatientUi = None
self.rightPanelUi = None
self.collaspedLeftPanelUi = None
self.dialog = None
self.lastDir = None
def guiAssemblage(self):
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
self.LeftPanelContent = QtWidgets.QFrame()
self.LeftPanelContent.setMinimumSize(QtCore.QSize(200, 0))
self.LeftPanelContent.setMaximumSize(QtCore.QSize(200, 16777215))
self.LeftPanelContent.setObjectName("LeftPanelContent")
self.PanelInfoPatient = QtWidgets.QFrame()
self.PanelInfoPatient.setMinimumSize(QtCore.QSize(250, 0))
self.PanelInfoPatient.setMaximumSize(QtCore.QSize(350, 16777215))
self.PanelInfoPatient.setObjectName("PanelInfoPatient")
self.PanelRight = QtWidgets.QFrame()
self.PanelRight.setMinimumSize(QtCore.QSize(700, 0))
self.PanelRight.setObjectName("PanelRight")
self.collaspedLeftPanel = QtWidgets.QFrame()
self.collaspedLeftPanel.setMinimumSize(QtCore.QSize(75, 0))
self.collaspedLeftPanel.setMaximumSize(QtCore.QSize(75, 16777215))
self.collaspedLeftPanel.setObjectName("collaspedLeftPanel")
self.leftPanelUi = Ui_LeftPanelContent()
self.leftPanelUi.setupUi(self.LeftPanelContent)
self.panelInfoPatientUi = Ui_Form()
self.panelInfoPatientUi.setupUi(self.PanelInfoPatient)
self.rightPanelUi = Ui_RightPanel()
self.rightPanelUi.setupUi(self.PanelRight)
self.collaspedLeftPanelUi = Ui_LeftPanelCollapsed()
self.collaspedLeftPanelUi.setupUi(self.collaspedLeftPanel)
self.gridLayout_2.addWidget(self.LeftPanelContent, 0, 0, 1, 1)
self.gridLayout_2.addWidget(self.PanelInfoPatient, 0, 1, 1, 1)
self.gridLayout_2.addWidget(self.PanelRight, 0, 2, 1, 1)
self.dialog = QDialog()
self.dialog.ui = Ui_popupDelete()
self.dialog.ui.setupUi(self.dialog)
self.dialog.setWindowTitle("Suppresion patient")
控制器：
class MainWindowController(object):
def __init__(self, appController):
self.appController = appController
self.model = None
self.view = None
def run(self):
self.view = MainWindow()
self.view.show()
self.view.guiAssemblage()
self.connectSignals()
def createPlot(self):
self.view.rightPanelUi.ContentRightPanel = pg.GraphicsLayoutWidget();
self.view.rightPanelUi.verticalLayout.addWidget(self.view.rightPanelUi.ContentRightPanel)
self.view.rightPanelUi.ContentRightPanel.hide()
def connectSignals(self):
self.view.leftPanelUi.HideButton.clicked.connect(self.onHideLeftPanelClicked)
self.view.panelInfoPatientUi.ButtonUpdate.clicked.connect(self.onUpdatePatientClicked)
self.view.panelInfoPatientUi.ButtonDelete.clicked.connect(self.onDeletePatientClicked)
self.view.rightPanelUi.ButtonEvent.clicked.connect(self.onEventClicked);
self.view.rightPanelUi.ButtonDay.clicked.connect(self.onDayClicked);
self.view.rightPanelUi.ButtonWeek.clicked.connect(self.onWeekClicked);
self.view.rightPanelUi.ButtonMonth.clicked.connect(self.onMonthClicked);
我也尝试在 guiAssemblage 方法中创建 GraphicsLayoutWidget 但我有同样的错误 请问我错过了什么？
所以我解决了我的问题。
我的 pyqtgraph 不是最新的。 不要使用不是最新的 PyPy 包。 我升级了 numpy，然后下载并用 GitHub 来源替换了我的 pyqtgraph 模块。
我还从我的计算机中删除了 PyQt5/PyQt4 和 PySide，然后重新安装 PyQt5
我尝试了几个解决方案直到这个堆栈：
C:\Users\Nicolas\Desktop\GitRepository\e-servicing\src (master)
λ pip install --upgrade pyqtgraph
Requirement already up-to-date: pyqtgraph in c:\python34\lib\site-packages
Requirement already up-to-date: numpy in c:\python34\lib\site-packages (from pyqtgraph)
C:\Users\Nicolas\Desktop\GitRepository\e-servicing\src (master)
λ python launcher.py
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 25, in <module>
import PyQt4
ImportError: No module named 'PyQt4'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 29, in <module>
import PySide
ImportError: No module named 'PySide'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "launcher.py", line 9, in <module>
import pyqtgraph as pg;
File "C:\Python34\lib\site-packages\pyqtgraph\__init__.py", line 13, in <module>
from .Qt import QtGui
File "C:\Python34\lib\site-packages\pyqtgraph\Qt.py", line 32, in <module>
raise Exception("PyQtGraph requires either PyQt4 or PySide; neither package could be imported.")
Exception: PyQtGraph requires either PyQt4 or PySide; neither package could be imported.
只需从 github 获取 PyQtGraph 源 成功了。