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How can I create new buttons with buttons and plot them in QGraphicScene with an array in PyQt5

I have an application where I have several button widgets on a QGraphicScene and I am trying to make this button widgets to make new buttons on QGraphicScene when they are clicked.
My code is as follows:
buttons = []
class SeveralButtons(QtWidgets.QWidget):
def __init__(self,id,x,y):
super(SeveralButtons,self).__init__()
self.id = id
self.x = x
self.y = y
self.setGeometry(x,y,1,1)
self.button1 = QtWidgets.QPushButton("B1")
self.button2 = QtWidgets.QPushButton("B2")
self.button1.clicked.connect(self.p1b)
self.severalButtonsLayout = QtWidgets.QGridLayout()
self.severalButtonsLayout.addWidget(self.button1, 0,0,)
self.severalButtonsLayout.addWidget(self.button2, 0,1,)
self.setLayout(self.severalButtonsLayout)
def p1b(self):
ph = SeveralButtons(0,self.x-200,self.y-200)
buttons.append(ph)
UiWindow._scene.addWidget(ph)
And my main class is like this:
class UiWindow(QtWidgets.QMainWindow):
factor = 1.5
def __init__(self, parent=None):
super(UiWindow, self).__init__(parent)
self.setFixedSize(940,720)
self._scene = QtWidgets.QGraphicsScene(self)
self._view = QtWidgets.QGraphicsView(self._scene)
self._view.setDragMode(QtWidgets.QGraphicsView.ScrollHandDrag)
self._view.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self._view.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.initButtons()
self.setCentralWidget(self._view)
def initButtons(self):
self.p = SeveralButtons(0,500,500)
buttons.append(self.p)
self._scene.addWidget(self.p)
def updateButtons(self,phrase):
for b in buttons:
if b != buttons[0]:
self._scene.addWidgets(b)
# ADD BUTTON WIDGET IN buttons ARRAY TO THE _scene OBJECT
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
ui = UiWindow()
ui.show()
sys.exit(app.exec_())
As it is shown in here I am trying to update widgets in main window with button click but I get QGraphicsProxyWidget::setWidget: cannot embed widget 0x24ac1a93000; already embedded error.
How can I overcome this problem or what is the sane way to make this work? My main goal in this program is that every button group can create their children button group when clicked. Doing this with classes is way to go or should I stick to methods in main window class when creating recursive widgets?
Thanks in advance.
EDIT:
class SeveralButtons(QtWidgets.QWidget):
b1Signal = QtCore.pyqtSignal()
def __init__():
self.button1 = QtWidgets.QPushButton()
self.button1.clicked.connect(self.b1)
...
def b1(self):
sb = SeveralButtons()
buttons.append(sb)
self.b1Signal.emit()
class UiWindow(QtWidgets.QMainWindow):
def __init__():
...
self.sb1 = SeveralButtons()
buttons.append(sb1)
self._scene.addWidget(self.sb1)
self.sb1.b1Signal.connect(self.updateButtons)
def updateButtons():
for b in buttons:
if b != buttons[0]:
self._scene.addWidget(b)

The SeveralButtons class should not be responsible of creating new buttons outside itself.
You should emit that signal and connect it to the function of its parent, which will then create a new instance of the same class and also connect the signal.
class SeveralButtons(QtWidgets.QWidget):
b1Signal = QtCore.pyqtSignal()
def __init__():
super().__init__()
layout = QtWidgets.QHBoxLayout(self)
self.button1 = QtWidgets.QPushButton()
self.button1.clicked.connect(self.b1Signal)
layout.addWidget(self.button1)
class UiWindow(QtWidgets.QMainWindow):
def __init__():
# ...
self.buttons = []
self.addButtons()
def addButtons():
newButtons = SeveralButtons()
newButtons.b1Signal.connect(self.addButtons)
self.buttons.append(newButtons)
self._scene.addWidget(newButtons)

PyQt5: How to reset the content of a QtWidgets.QGroupBox

I have a RadioButtonWidget class that receives a list of names (button_list) and a QtWidgets.QGroupBox (radio_group_box) and creates a radio button for each name. The problem I have is that after creating the buttons, I cannot change them. That is if I call the class again with another list of names, nothing changes. I need to create a function inside my class to remove any existing radio buttons so that I can add a new list inside it.
I tried to do radio_group_box.deleteLater() outside the class but this removes the whole box.
class RadioButtonWidget(QtWidgets.QWidget):
def __init__(self, radio_group_box, button_list):
super().__init__()
self.radio_group_box = radio_group_box
self.radio_button_group = QtWidgets.QButtonGroup()
#create the radio buttons
self.radio_button_list = []
for each in button_list:
self.radio_button_list.append(QtWidgets.QRadioButton(each))
if button_list != []:
#set the default checked item
self.radio_button_list[0].setChecked(True)
#create layout for radio buttons and add them
self.radio_button_layout = QtWidgets.QVBoxLayout()
# add buttons to the layout and button group
counter = 1
for each in self.radio_button_list:
self.radio_button_layout.addWidget(each)
self.radio_button_group.addButton(each)
self.radio_button_group.setId(each,counter)
counter += 1
# add radio buttons to the group box
self.radio_group_box.setLayout(self.radio_button_layout)
def selected_button(self):
return self.radio_button_group.checkedId()

Instead of removing the radio buttons, you can create a whole new radio button layout and set it for the group box exactly as you did in the constructor. Here is an example where the function set_group_box_buttons will remove the existing layout from radio_group_box (which is done by setting it to a temp widget), and add a new one with the new buttons.
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
class RadioButtonWidget(QWidget):
def __init__(self, radio_group_box, button_list):
super().__init__()
self.radio_group_box = radio_group_box
self.set_group_box_buttons(button_list)
grid = QGridLayout(self)
grid.addWidget(self.radio_group_box)
def selected_button(self):
return self.radio_button_group.checkedId()
def set_group_box_buttons(self, button_list):
self.radio_button_group = QButtonGroup()
self.radio_button_list = [QRadioButton(x) for x in button_list]
if button_list:
self.radio_button_list[0].setChecked(True)
if self.radio_group_box.layout():
QWidget().setLayout(self.radio_group_box.layout())
self.radio_button_layout = QVBoxLayout()
for i, v in enumerate(self.radio_button_list):
self.radio_button_layout.addWidget(v)
self.radio_button_group.addButton(v)
self.radio_button_group.setId(v, i)
self.radio_group_box.setLayout(self.radio_button_layout)
class Template(QWidget):
def __init__(self):
super().__init__()
self.rbw = RadioButtonWidget(QGroupBox('Radio Buttons'), ['Radio 1', 'Radio 2', 'Radio 3'])
self.box = QLineEdit()
self.box.returnPressed.connect(self.replace_buttons)
grid = QGridLayout(self)
grid.addWidget(self.rbw, 0, 0)
grid.addWidget(self.box, 0, 1)
def replace_buttons(self):
self.rbw.set_group_box_buttons(self.box.text().split(', '))
if __name__ == '__main__':
app = QApplication(sys.argv)
gui = Template()
gui.show()
sys.exit(app.exec_())
To demonstrate, I added a QLineEdit which will update the names when you press enter. Before:
After:

There's a conceptual error in your code: you are creating a new RadioButtonGroup, which is a widget, but you are not using it.
As long as each group box will only contain the radio buttons, there is no need to create a new widget (especially if you're not actually using it); you just have to create a layout if the groupbox doesn't have one yet.
There are at least two possible approaches to your question.
For both of them I always use existing radios if possible, to avoid unnecessary object destruction each time the options change, so that they are removed only when the number of options decreases. This also avoids unnecessary layout updates (especially if the number of options is the same).
I also kept the logical "interface" consistent, providing the same method and behavior of update_options(groupBox, options).
QObject based group
With this implementation, I'm creating an object that acts as an interface responsible of creating a QButtonGroup and setting the options, while also providing signals for the state change or the current checked radio.
class RadioButtonGroup(QtCore.QObject):
optionToggled = QtCore.pyqtSignal(object, int, bool)
optionChanged = QtCore.pyqtSignal(object, int)
def __init__(self, radio_group_box, button_list):
super().__init__()
self.groupBox = radio_group_box
layout = radio_group_box.layout()
self.buttonGroup = QtWidgets.QButtonGroup(self)
self.buttonGroup.buttonToggled[int, bool].connect(self.changed)
if layout is None:
layout = QtWidgets.QVBoxLayout(radio_group_box)
for i, text in enumerate(button_list, 1):
radio = QtWidgets.QRadioButton(text)
layout.addWidget(radio)
self.buttonGroup.addButton(radio, i)
def button(self, id):
return self.buttonGroup.button(id)
def changed(self, i, state):
self.optionToggled.emit(self, i, state)
if state:
self.optionChanged.emit(self, i)
def selected_button(self):
return self.buttonGroup.checkedId()
def update_options(self, button_list):
layout = self.groupBox.layout()
# this method will keep the current checked radio as checked, if you want
# to reset it everytime, just uncomment the next commented lines
#self.buttonGroup.setExclusive(False)
for i, text in enumerate(button_list, 1):
radio = self.buttonGroup.button(i)
if radio:
#radio.setChecked(False)
radio.setText(text)
else:
radio = QtWidgets.QRadioButton(text)
layout.addWidget(radio)
self.buttonGroup.addButton(radio, i)
#self.buttonGroup.setExclusive(True)
if len(button_list) == len(self.buttonGroup.buttons()):
return
# there are more radios than needed, remove them
for radio in self.buttonGroup.buttons():
id = self.buttonGroup.id(radio)
if id > i:
self.buttonGroup.removeButton(radio)
radio.deleteLater()
class ObjectBased(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
uic.loadUi('buttongroup.ui', self)
self.pushButton.clicked.connect(self.setOptions)
self.groupBoxes = self.groupBox1, self.groupBox2, self.groupBox3
self.radioButtonGroups = []
for box in self.groupBoxes:
group = RadioButtonGroup(box,
['Option {}'.format(o + 1) for o in range(randrange(1, 10))])
self.radioButtonGroups.append(group)
group.optionChanged.connect(self.optionChanged)
def setOptions(self):
buttonGroup = self.radioButtonGroups[self.comboBox.currentIndex()]
options = ['Option {}'.format(o + 1) for o in range(self.spinBox.value())]
buttonGroup.update_options(options)
def optionChanged(self, radioButtonGroup, id):
groupBox = radioButtonGroup.groupBox
print('{} checked {} ({})'.format(
groupBox.title(), id, radioButtonGroup.button(id).text()))
Self contained
In this mode, the logic is all within the window class. While this approach is slightly simpler than the other one, we're missing an unique "interface", which might be useful for access from external objects instead.
class SelfContained(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
uic.loadUi('buttongroup.ui', self)
self.pushButton.clicked.connect(self.setOptions)
self.radioButtonGroups = []
for g, groupBox in enumerate((self.groupBox1, self.groupBox2, self.groupBox3)):
buttonGroup = QtWidgets.QButtonGroup(self)
self.radioButtonGroups.append((groupBox, buttonGroup))
buttonGroup.buttonToggled[int, bool].connect(lambda id, state, g=g: self.optionChanged(g, id, state))
self.update_options(g, ['Option {}'.format(o + 1) for o in range(randrange(1, 10))])
def update_options(self, groupId, button_list):
groupBox, buttonGroup = self.radioButtonGroups[groupId]
layout = groupBox.layout()
if layout is None:
layout = QtWidgets.QVBoxLayout(groupBox)
# as above...
#buttonGroup.setExclusive(False)
for i, text in enumerate(button_list, 1):
radio = buttonGroup.button(i)
if radio:
#radio.setChecked(False)
radio.setText(text)
else:
radio = QtWidgets.QRadioButton(text)
layout.addWidget(radio)
buttonGroup.addButton(radio, i)
#buttonGroup.setExclusive(True)
if len(button_list) == len(buttonGroup.buttons()):
return
for radio in buttonGroup.buttons():
id = buttonGroup.id(radio)
if id > i:
buttonGroup.removeButton(radio)
radio.deleteLater()
def setOptions(self):
groupId = self.comboBox.currentIndex()
options = ['Option {}'.format(o + 1) for o in range(self.spinBox.value())]
self.update_options(groupId, options)
def optionChanged(self, groupId, id, state):
if state:
groupBox, buttonGroup = self.radioButtonGroups[groupId]
print('{} checked {} ({})'.format(groupBox.title(), id, buttonGroup.button(id).text()))

Qcombobox with Qlabel and signal&slot

I have a Qgroupbox which contains Qcombobox with Qlabels, I want to select a value from Qcombobox and display the value as Qlabel. I have the complete code, even I do print value before and after within function every thing works as it should, Only display setText wont set text to Qlabel and update it.
Current screen
What I want
I've corrected signal code, when Qgroupbox in it Qcombobox appears or value would be changed, self.activation.connect(......) would emit an int of the index. to ensure that would work I print it-value inside the def setdatastrength(self, index), see figure below indeed it works, then argument would be passed to function self.concreteproperty.display_condata(it) would be called and do a print of value inside def display_condata(self, value) to make sure about value passing, as shown figure below, it does work. This line code self.con_strength_value.setText(fmt.format(L_Display))
wont assign value to Qlabel.
The script
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class secondtabmaterial(QtWidgets.QWidget):
def __init__(self, parent=None):
super(secondtabmaterial, self).__init__(parent)
self.concretewidgetinfo = ConcreteStrengthInFo()
Concrete_Group = QtWidgets.QGroupBox(self)
Concrete_Group.setTitle("&Concrete")
Concrete_Group.setLayout(self.concretewidgetinfo.grid)
class ConcreteStrengthComboBox(QtWidgets.QComboBox):
def __init__(self, parent = None):
super(ConcreteStrengthComboBox, self).__init__(parent)
self.addItems(["C12/15","C16/20","C20/25","C25/30","C30/37","C35/45"
,"C40/50","C45/55","C50/60","C55/67","C60/75","C70/85",
"C80/95","C90/105"])
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
self.compressive_strength = ["12","16","20","25","30","35","40",
"45","50","55","60","70","80","90"]
class ConcreteProperty(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ConcreteProperty, self).__init__(parent)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
concretestrength_lay = QtWidgets.QHBoxLayout(self)
fctd = "\nfcd\n\nfctd\n\nEc"
con_strength = QtWidgets.QLabel(fctd)
self.con_strength_value = QtWidgets.QLabel(" ")
concretestrength_lay.addWidget(con_strength)
concretestrength_lay.addWidget(self.con_strength_value, alignment=QtCore.Qt.AlignRight)
self.setLayout(concretestrength_lay)
#QtCore.pyqtSlot(int)
def display_condata(self, value):
try:
L_Display = str(value)
print("-------- After ------")
print(L_Display, type(L_Display))
fmt = "{}mm"
self.con_strength_value.setText(fmt.format(L_Display))
except ValueError:
print("Error")
class ConcreteStrengthInFo(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ConcreteStrengthInFo, self).__init__(parent)
self.concreteproperty = ConcreteProperty()
self.concretestrengthbox = ConcreteStrengthComboBox()
self.concretestrengthbox.activated.connect(self.setdatastrength)
hbox = QtWidgets.QHBoxLayout()
concrete_strength = QtWidgets.QLabel("Concrete strength: ")
hbox.addWidget(concrete_strength)
hbox.addWidget(self.concretestrengthbox)
self.grid = QtWidgets.QGridLayout()
self.grid.addLayout(hbox, 0, 0)
self.grid.addWidget(self.concreteproperty, 1, 0)
#QtCore.pyqtSlot(int)
def setdatastrength(self, index):
it = self.concretestrengthbox.compressive_strength[index]
self.concreteproperty.display_condata(it)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = secondtabmaterial()
w.show()
sys.exit(app.exec_())
Above code is corrected and final. Now it works as it should.

I think the issue is that your receiving slot doesn't match any of the available .activated signals.
self.activated.connect(self.setdatastrength)
#QtCore.pyqtSlot()
def setdatastrength(self):
index = self.currentIndex()
it = self.compressive_strength[index]
print(it)
self.concreteproperty.display_condata(it)
The QComboBox.activated signal emits either an int of the index, or a str of the selected value. See documentation.
You've attached it to setdatastrength which accepts doesn't accept any parameters (aside from self, from the object) — this means it doesn't match the signature of either available signal, and won't be called. If you update the definition to add the index value, and accept a single int it should work.
self.activated.connect(self.setdatastrength)
#QtCore.pyqtSlot(int) # add the target type for this slot.
def setdatastrength(self, index):
it = self.compressive_strength[index]
print(it)
self.concreteproperty.display_condata(it)
After the update — the above looks now to be fixed, although you don't need the additional index = self.currentIndex() in setdatastrength it's not doing any harm.
Looking at your code, I think the label is being updated. The issue actually is that you can't see the label at all. Looking at the init for ConcreteProperty
class ConcreteProperty(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ConcreteProperty, self).__init__(parent)
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
self.concretestrength_lay = QtWidgets.QHBoxLayout()
fctd = "\nfcd\n\nfctd\n\nEc"
con_strength = QtWidgets.QLabel(fctd)
self.con_strength_value = QtWidgets.QLabel(" ")
self.concretestrength_lay.addWidget(con_strength)
self.concretestrength_lay.addWidget(self.con_strength_value, alignment=QtCore.Qt.AlignLeft)
The reason the changes are not appearing is that you create two ConcreteProperty objects, one in ConcreteStrengthInfo and one in ConcreteStrengthComboBox. Updates to the combo box trigger an update of the ConcreteProperty attached to the combobox, not the other one (they are separate objects). The visible ConcreteProperty is unaffected.
To make this work, you need to move the signal attachment + the slot out of the combo box object. The following is a replacement for the two parts —
class ConcreteStrengthComboBox(QtWidgets.QComboBox):
def __init__(self, parent = None):
super(ConcreteStrengthComboBox, self).__init__(parent)
self.addItems(["C12/15","C16/20","C20/25","C25/30","C30/37","C35/45","C40/50","C45/55",
"C50/60","C55/67","C60/75","C70/85","C80/95","C90/105"])
self.setFont(QtGui.QFont("Helvetica", 10, QtGui.QFont.Normal, italic=False))
self.compressive_strength = ["12","16","20","25","30","35","40","45","50","55",
"60","70","80","90"]
class ConcreteStrengthInFo(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ConcreteStrengthInFo, self).__init__(parent)
hbox = QtWidgets.QHBoxLayout()
concrete_strength = QtWidgets.QLabel("Concrete strength: ")
hbox.addWidget(concrete_strength)
self.concreteproperty = ConcreteProperty()
self.concretestrengthbox = ConcreteStrengthComboBox()
hbox.addWidget(self.concretestrengthbox)
self.concretestrengthbox.activated.connect(self.setdatastrength)
self.vlay = QtWidgets.QVBoxLayout()
self.vlay.addLayout(hbox)
self.vlay.addLayout(self.concreteproperty.concretestrength_lay)
#QtCore.pyqtSlot(int)
def setdatastrength(self, index):
it = self.concretestrengthbox.compressive_strength[index]
print(it)
self.concreteproperty.display_condata(it)
This works for me locally.

Dynamically add and remove a Layout when one of the Radio Button is Selected

I m able to dynamically add a layout to QHBoxLayout in pyqt , however I m unable to remove them once added.
Main aim is to dynamically add and remove a layout based on the Radio Button selected.
def SearchTab(self):
self.layout = QVBoxLayout()
button_layout = QHBoxLayout()
radio_button_1 = QRadioButton("Search")
radio_button_2 = QRadioButton("Update")
button_layout.addWidget(radio_button_1)
button_layout.addWidget(radio_button_2)
self.layout.addItem(button_layout)
radio_button_1.toggled.connect(lambda :self.SelectButtonCheck(radio_button_1))
radio_button_1.toggled.connect(lambda :self.UpdateButtonCheck(radio_button_2))
self.setTabText(0,"Search")
self.tab1.setLayout(self.layout)
def SelectButtonCheck(self,b):
if b.text() == "Search":
if b.isChecked():
print(b.text()+ "is selected")
self.pg_details = pgd.PGDetails()
layout = self.pg_details.returnLayout()
self.layout.addLayout(layout)
def UpdateButtonCheck(self,b):
if b.text() == "Update":
if b.isChecked():
print(b.text()+ " is selected")
for i in range(self.layout.count()):
print(self.layout.itemAt(i))
temp_layout = self.layout.itemAt(i)
widget = temp_layout.widget()
temp_layout.removeItem(temp_layout)
if widget is not None:
widget.deleteLater()
Initial Screen-
Currently I m able to add the layout when "Search" Radio Button is selected --
But Nothing happens when I select "Update" RadioButton
Also find the layouts that have been added-
for i in range(self.layout.count()):
print(self.layout.itemAt(i))
<PyQt5.QtWidgets.QHBoxLayout object at 0x1180ec438>
<PyQt5.QtWidgets.QFormLayout object at 0x1180ff828>
Layouts are being added but not getting removed.
Any leads would be helpful , in what I m missing here

I was able to solve this. Took me a while but understood what is the arrangement of widgets within the layouts.
I assumed removing the layout will cascade delete the widgets itself.
I used the below function to remove the layout and its widgets corresponding to it.
def SearchTab(self):
self.layout = QVBoxLayout()
button_layout = QHBoxLayout()
radio_button_1 = QRadioButton("Search")
radio_button_2 = QRadioButton("Update")
button_layout.addWidget(radio_button_1)
button_layout.addWidget(radio_button_2)
self.layout.addItem(button_layout)
#createDB()
radio_button_1.toggled.connect(lambda :self.SelectButtonCheck(radio_button_1,self.layout))
radio_button_1.toggled.connect(lambda :self.UpdateButtonCheck(radio_button_2,self.layout))
#layout.addRow("Address",QLineEdit())
self.setTabText(0,"Search")
update_layout = QHBoxLayout()
#update_layout.set
#update_btn = QDialogButtonBox(QDialogButtonBox)
#update_btn.setAlignment(Qt.AlignBottom)
update_layout.setAlignment(QtCore.Qt.AlignTop)
update_btn = QPushButton('Update')
reset_btn = QPushButton('Reset')
#self.layout.addRow(update_layout)
update_layout.addWidget(update_btn)
update_layout.addWidget(reset_btn)
update_btn.clicked.connect(self.createDB)
self.tab1.setLayout(self.layout)
def SelectButtonCheck(self,b,stacklayout):
if b.text() == "Search":
if b.isChecked():
print(b.text()+ "is selected")
self.pg_details = pgd.PGDetails()
layout = self.pg_details.returnLayout()
self.layout.addLayout(layout)
def removeLayout(self,layout):
for i in range(layout.count()):
temp_layout = layout.itemAt(i)
if temp_layout is not None:
widget = temp_layout.widget()
if widget is not None:
widget.deleteLater()
else:
return
if temp_layout.layout() is not None:
self.removeLayout(temp_layout.layout())
def removeFormLayout(self,layout):
if layout is not None:
for i in range(layout.count()):
temp_layout = layout.itemAt(i)
if isinstance(temp_layout.layout(),type(QFormLayout())):
self.removeLayout(temp_layout.layout())
else:
next
else:
return
def UpdateButtonCheck(self,b,stacklayout):
if b.text() == "Update":
if b.isChecked():
print(b.text()+ " is selected")
self.removeFormLayout(stacklayout)
The removeFormLayout function picks out the formlayout that I added with the Search radio button and removeLayout removes all the widgets under it as well.
Open to suggestions and improvements in the method used, I tried it with a couple of layout removals other then FormLayout as well. Currently it is working fine.
Also is anybody aware of how to align the HBoxLayout at the top , the radio button starts from the middle again , I want to align them at the top of the screen

Another way is to do the following. QWidget and thus QGroupBox have a show/hide option.
Note, its best to always hide first, otherwise things get wonky
I have a test function that has the following control logic
if isOn:
self.gb1.hide()
self.gb2.show()
else:
self.gb2.hide()
self.gb1.show()
I created a layout that contains both group boxes above. see the sample logic below. I am sure there is a way to do this without storing the variables in the window class.
def create_layout(self):
ly = QHBoxLayout()
self.gb1 = self.create_gb_test1()
self.gb2 = self.create_gb_test2()
ly.addWidget(self.gb1)
ly.addWidget(self.gb2)
return ly
def create_gb_test1(self):
my_name = inspect.currentframe().f_code.co_name
gb = QGroupBox("Find")
btn_find = QPushButton()
ly_horiz = QHBoxLayout()
ly_horiz.addWidget(QLabel("Find:"))
ly_horiz.addWidget(QLineEdit("Some Text", ))
ly_horiz.addWidget(btn_find)
self.ly_find_only = ly_horiz
gb.setLayout(ly_horiz)
return gb
def btn_open_click(self):
pass
def create_gb_test2(self):
my_name = inspect.currentframe().f_code.co_name
gb = QGroupBox("View")
btn_open = QPushButton
cbo = QComboBox()
cbo.addItems(['a', 'b'])
ly_horiz = QHBoxLayout()
ly_horiz.addWidget(QLabel("Find:"))
ly_horiz.addWidget(cbo)
ly_horiz.addWidget(btn_open)
self.ly_find_only = ly_horiz
gb.setLayout(ly_horiz)
return gb

QTablewidget doesn't show new cellWidgets in PyQt5

My Program is written in Python3.5 and PyQt5. I have a method in my class that adds some custom widgets to a QTableWidget. when I call the function from inside the class it works and changes the cellwidgets of QTablewidget but when I call it from another custom class it doesn't change the widgets. I checked and the items and indexes changes but the new cellwidgets doesn't show. what is the problem?
This is my code:
class mainmenupage(QWidget):
elist = []
def __init__(self):
#the main window widget features
self.setObjectName("mainpage")
self.resize(800, 480)
sizePolicy = QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.sizePolicy().hasHeightForWidth())
self.setSizePolicy(sizePolicy)
self.setMinimumSize(QSize(800, 480))
self.setMaximumSize(QSize(800, 480))
#the QTreeWidget features
self.category_tree = QTreeWidget(self)
self.category_tree.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.category_tree.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.category_tree.setGeometry(QRect(630, 90, 161, 381))
self.category_tree.setLayoutDirection(Qt.RightToLeft)
self.category_tree.setLocale(QLocale(QLocale.Persian, QLocale.Iran))
self.category_tree.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.category_tree.setUniformRowHeights(False)
self.category_tree.setColumnCount(1)
self.category_tree.setObjectName("category_tree")
self.category_tree.headerItem().setText(0, "1")
self.category_tree.setFrameShape(QFrame.NoFrame)
self.category_tree.header().setVisible(False)
self.category_tree.header().setSortIndicatorShown(False)
self.category_tree.setFocusPolicy(Qt.NoFocus))
#the QTableWidget features. It comes from the custom class myTableWidget
self.main_table = myTableWidget(self)
self.main_table.setGeometry(QRect(20, 140, 600, 330))
sizePolicy = QSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
sizePolicy.setHorizontalStretch(0)
sizePolicy.setVerticalStretch(0)
sizePolicy.setHeightForWidth(self.main_table.sizePolicy().hasHeightForWidth())
self.main_table.setSizePolicy(sizePolicy)
self.main_table.setMinimumSize(QSize(0, 0))
self.main_table.setLayoutDirection(Qt.LeftToRight)
self.main_table.setLocale(QLocale(QLocale.Persian, QLocale.Iran))
self.main_table.setInputMethodHints(Qt.ImhNone)
self.main_table.setFrameShape(QFrame.NoFrame)
self.main_table.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.main_table.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.main_table.setEditTriggers(QAbstractItemView.NoEditTriggers)
self.main_table.setTabKeyNavigation(False)
self.main_table.setShowGrid(False)
self.main_table.setCornerButtonEnabled(False)
self.main_table.setUpdatesEnabled(True)
self.main_table.setRowCount(2)
self.main_table.setColumnCount(2)
self.main_table.setObjectName("main_table")
self.main_table.horizontalHeader().setVisible(False)
self.main_table.horizontalHeader().setHighlightSections(False)
self.main_table.verticalHeader().setVisible(False)
self.main_table.verticalHeader().setHighlightSections(False)
self.main_table.setFocusPolicy(Qt.NoFocus)
self.main_table.setSelectionMode(QAbstractItemView.NoSelection)
self.main_table.horizontalHeader().setDefaultSectionSize(300)
self.main_table.verticalHeader().setDefaultSectionSize(165)
self.category_tree.itemPressed.connect(self.insertdata)
def insertdata(self,subcat):
#get the text of clicked item from qtreewidget
item = self.category_tree.currentItem().text(0)
#get data from DB
datas = self.conn.retrievedata('*','words',"subcat='{}'".format(item))
#check if the list of copied data is empty or not
if mainmenupage.elist != []:
del mainmenupage.elist[:]
#if the list is empty, the data received from DB appends to it
if mainmenupage.elist == []:
for data in datas:
mainmenupage.elist.append(data)
#delete the first index of copied list because it isn't needed here
mainmenupage.elist = mainmenupage.elist[1:]
# calls the populatemain function for populating qtablewidget with these datas with a custom index e.g. index 5 to 9.
self.populatemain(5,9)
def populatemain(self,startindexdata,endindexdata):
#make a list for indexes of items that will be added to qtablewidget
mtl=[]
for i in range(2):
for j in range(2):
mtl.append(i)
mtl.append(j)
#adding custom widgets as cellWidgets to qtablewidget
for index, my in enumerate(zip(*[iter(mtl)]*2)):
if mainmenupage.elist != []:
data = mainmenupage.elist[startindexdata:endindexdata][index]
exec("self.iteM{} = CustomWidget('{}','content/img/food.png')".format(data[0],data[4]))
exec("self.main_table.setCellWidget({} ,{}, self.iteM{})".format(*my,data[0]))
class myTableWidget(QTableWidget):
def checking(self):
if (self.endgingposx - self.startingposx) <= -50:
#a custom function for checking that if the user made a swipe to left on the qtablewidget for chaning it's content
if mainmenupage.elist != []:
#make an instance from the previous class for accessing to populatemain method
x = mainmenupage()
#calling populatemain method for changing widgets in qtablewidget with the items made from different indexes of the copied data list e.g. indexes 0 to 4. but i don't know why this doesn't change the items. The populatemain function runs correctly it can be checked by putting print statement in it but it doesn't change the Qtablewidget contents.
x.populatemain(0,4)
def mousePressEvent(self,event):
super().mousePressEvent(event)
self.startingposx = event.x()
def mouseReleaseEvent(self,event):
super().mouseReleaseEvent(event)
self.endgingposx = event.x()
self.checking()
class CustomWidget(QWidget):
def __init__(self, text, img, parent=None):
QWidget.__init__(self, parent)
self._text = text
self._img = img
self.setLayout(QVBoxLayout())
self.lbPixmap = QLabel(self)
self.lbText = QLabel(self)
self.lbText.setAlignment(Qt.AlignCenter)
self.layout().addWidget(self.lbPixmap)
self.layout().addWidget(self.lbText)
self.initUi()
def initUi(self):
self.lbPixmap.setPixmap(QPixmap(self._img).scaled(260,135,Qt.IgnoreAspectRatio,transformMode = Qt.SmoothTransformation))
self.lbText.setText(self._text)
#pyqtProperty(str)
def img(self):
return self._img
#img.setter
def total(self, value):
if self._img == value:
return
self._img = value
self.initUi()
#pyqtProperty(str)
def text(self):
return self._text
#text.setter
def text(self, value):
if self._text == value:
return
self._text = value
self.initUi()
self.category_tree is a QTreeWidget
self.main_table is a QTableWidget
For completing my question. When I click on one of the self.category_tree items it calls insertdata. At the last line of insertdata I call self.populatemain(5,9) it adds 4 custom widgets to my table, but when the checking method from myTableWidget class calls populatemain with other indexes the qtablewidget items doesn't change. What's wrong?
Thank you in advance.

After a lot of efforts finally I solved my problem this way:
I made a Qframe and putted the QTableWidget in it, and then I editted the mousePressEvent of the QTableWidget to call mousePressEvent of the QFrame that is below if this table, and then simply checked for starting and ending positions of clicking and made a function to update the QTableWidget's contents when swiping happens. I posted this to help anyone else that goes to problems like this.