Triggering and updating a docked window
I am trying to control some valves with a GUI and update the display when the button is pressed. The following code produces the correct initial display, but when I click one of the checkboxes I always get the value of i=2 and when unchecked I get i=0. I also have no idea how to update the docked window so that the message will toggle from close to open and vise versa. I do see the resultant value in self.states change in the array, but am always left with ['open', 'closed', 'open', 'closed', 'closed', 'closed'] Though this is changed the red closed on the right of the screen does not change to `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
If I understand correctly I can just actuate the valve like I would normally in the function checkedBox.
This is what is displayed
I want to be able to click a checkbox and the message just to the right to change from closed to open, and vise versa.
The problem arises because the default value of i takes the value sent by the signal (ie state: Unchecked = 0, PartiallyChecked = 1, Checked = 2), to solve this we will add a further value to the function: Index of the checkbox. Also if you want to change the text of QLabel you must be able to access them so I have created a new list with labels. To make the change we will use the states list, for this implement the function 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)
