我正在尝试使用 GUI 控制一些阀门，并在按下按钮时更新显示。以下代码产生正确的初始显示，但是当我单击其中一个复选框时，我总是得到 i=2 的值，而未选中时，我得到 i=0 。我也不知道如何更新停靠窗口，以便消息从 close 切换到 open，反之亦然。我确实看到数组中 self.states 的结果值发生了变化，但总是留下 ['open', 'close', 'open', 'close', 'close' , 'close'] 虽然这已更改，但屏幕右侧的红色 close 并未更改为 `open
class ApplicationWindow(gui.QMainWindow):
def __init__(self):
self.nCheckBoxes=6
self.states = ['closed']*self.nCheckBoxes
gui.QMainWindow.__init__(self)
self.setAttribute(core.Qt.WA_DeleteOnClose)
self.setWindowTitle("PiView")
self.file_menu = gui.QMenu('&File', self)
self.file_menu.addAction('&Quit', self.fileQuit, core.Qt.CTRL + core.Qt.Key_Q)
self.menuBar().addMenu(self.file_menu)
self.help_menu = gui.QMenu('&Help', self)
self.menuBar().addSeparator()
self.menuBar().addMenu(self.help_menu)
self.help_menu.addAction('&About', self.about)
self.help_menu.addAction('&Docs', self.doc)
self.main_widget = gui.QWidget(self)
l = gui.QVBoxLayout(self.main_widget)
self.dc = MyMplCanvas(self.main_widget, width=5, height=4, dpi=100)
l.addWidget(self.dc)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
self.dw = self.createDockWindows(self.dc)
self.statusBar().showMessage("Initialized", 2000)
def createDockWindows(self, MyMplCanvas):
"""
Create all the dock widgets
"""
self.drawValves()
self.drawGraphAdjustments()
self.drawStartAndStop()
def drawValves(self):
cboxes = gui.QDockWidget("Controls", self)
cboxes.setAllowedAreas(core.Qt.LeftDockWidgetArea)
w = gui.QWidget()
#layout = gui.QVBoxLayout()
layout = gui.QGridLayout()
w.setLayout(layout)
self.c = [0]*self.nCheckBoxes
# Create self.nCheckBoxes
msgBox = gui.QLabel()
msgBox.setText("States")
font = gui.QFont()
font.setBold(True)
msgBox.setFont(font)
msgBox.setStyleSheet("color: rgb(255,0,0)")
layout.addWidget(msgBox,0,1)
for i in range(self.nCheckBoxes):
self.c[i] = gui.QCheckBox("Valve " + str(i))
self.c[i].setChecked(False)
#self.c[i].stateChanged.connect(lambda:self.btnstate(self.c[i]))
#self.c[i].stateChanged.connect(self.checkedBox)
self.c[i].stateChanged.connect(lambda i: self.checkedBox(i))
layout.addWidget(self.c[i],i+1,0)
# Messages
msgBox = gui.QLabel()
msgBox.setText(self.states[i])
if self.states[i] == 'closed':
msgBox.setStyleSheet("color: rgb(255,0,0)")
else:
msgBox.setStyleSheet("color: rgb(0,255,0)")
layout.addWidget(msgBox,i+1,1)
spacerItem = gui.QSpacerItem(20,40, gui.QSizePolicy.Minimum, gui.QSizePolicy.Expanding)
layout.addItem(spacerItem)
cboxes.setWidget(w)
self.addDockWidget(core.Qt.LeftDockWidgetArea, cboxes)
def checkedBox(self,i):
sender = self.sender()
self.states[i] = 'open' if 'close' else 'close'
# For debugging
print i
print self.states
如果我理解正确的话，我可以像通常在函数 checkedBox 中一样启动阀门。
这是显示的内容
我希望能够单击右侧的复选框和消息，将“关闭”更改为“打开”，反之亦然。
最佳答案
出现问题的原因是 i 的默认值采用信号发送的值(即状态:Unchecked = 0、PartiallyChecked = 1、Checked = 2)，为了解决这个问题，我们将向函数添加另一个值:复选框的索引。另外，如果您想更改 QLabel 的文本，您必须能够访问它们，因此我创建了一个带有标签的新列表。为了进行更改，我们将使用状态列表，为此实现函数 updateLabels。
class ApplicationWindow(gui.QMainWindow):
def __init__(self):
self.nCheckBoxes=6
self.states = ['closed']*self.nCheckBoxes
gui.QMainWindow.__init__(self)
self.setAttribute(core.Qt.WA_DeleteOnClose)
self.setWindowTitle("PiView")
self.file_menu = gui.QMenu('&File', self)
#self.file_menu.addAction('&Quit', self.fileQuit, core.Qt.CTRL + core.Qt.Key_Q)
self.menuBar().addMenu(self.file_menu)
self.help_menu = gui.QMenu('&Help', self)
self.menuBar().addSeparator()
self.menuBar().addMenu(self.help_menu)
#self.help_menu.addAction('&About', self.about)
#self.help_menu.addAction('&Docs', self.doc)
self.main_widget = gui.QWidget(self)
l = gui.QVBoxLayout(self.main_widget)
self.dc = MyMplCanvas(self.main_widget, width=5, height=4, dpi=100)
l.addWidget(self.dc)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
self.dw = self.createDockWindows(self.dc)
self.statusBar().showMessage("Initialized", 2000)
def createDockWindows(self, MyMplCanvas):
"""
Create all the dock widgets
"""
self.drawValves()
#self.drawGraphAdjustments()
#self.drawStartAndStop()
def drawValves(self):
cboxes = gui.QDockWidget("Controls", self)
cboxes.setAllowedAreas(core.Qt.LeftDockWidgetArea)
w = gui.QWidget()
#layout = gui.QVBoxLayout()
layout = gui.QGridLayout()
w.setLayout(layout)
self.c = []
self.l = []
# Create self.nCheckBoxes
msgBox = gui.QLabel()
msgBox.setText("States")
font = gui.QFont()
font.setBold(True)
msgBox.setFont(font)
msgBox.setStyleSheet("color: rgb(255,0,0)")
layout.addWidget(msgBox,0,1)
for i in range(self.nCheckBoxes):
checkBox = gui.QCheckBox("Valve " + str(i))
checkBox.setChecked(False)
checkBox.stateChanged.connect(lambda state, p=i: self.checkedBox(state, p))
self.c.append(checkBox)
layout.addWidget(self.c[i],i+1,0)
msgBox = gui.QLabel()
msgBox.setText(self.states[i])
self.l.append(msgBox)
layout.addWidget(msgBox,i+1,1)
self.update_labels()
spacerItem = gui.QSpacerItem(20,40, gui.QSizePolicy.Minimum, gui.QSizePolicy.Expanding)
layout.addItem(spacerItem)
cboxes.setWidget(w)
self.addDockWidget(core.Qt.LeftDockWidgetArea, cboxes)
def checkedBox(self, state, p):
if state == core.Qt.Unchecked:
self.states[p] = 'closed'
else:
self.states[p] = 'open'
self.update_labels()
def update_labels(self):
for i in range(self.nCheckBoxes):
if self.states[i] == 'closed':
text = "closed"
styleSheet = "color: rgb(255,0,0)"
else:
text = "open"
styleSheet = "color: rgb(0,255,0)"
self.l[i].setText(text)
self.l[i].setStyleSheet(styleSheet)
关于python - 触发和更新停靠窗口，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43145460/