So I have the following problem. I have a MainWindow which contains a Tabwidget. In my main interface, I want to access the widgets in each Tab-page in the following manner:
self.tab1.MyLineEdit
self.tab2.MyLineEdit
et cetera.
So every tab contains MyLineEdit but I want to access the different ones as members of instances of the QWidgetclass Tab. How can I do that in Qtdesigner? Can I somehow create a tab in QtDesigner and then load it into the tabwidget (by self.tabWidget.add() maybe?)? How could I do this?
Thanks in advance
You can add tabs through this code:
from PyQt4 import QtGui
from PyQt4 import QtCore
import sys
def main():
app = QtGui.QApplication(sys.argv)
tabs = QtGui.QTabWidget()
# Create tabs
tab1 = QtGui.QWidget()
tab2 = QtGui.QWidget()
tab3 = QtGui.QWidget()
tab4 = QtGui.QWidget()
# Resize width and height
tabs.resize(250, 150)
# Set layout of first tab
vBoxlayout = QtGui.QVBoxLayout()
pushButton1 = QtGui.QPushButton("Start")
pushButton2 = QtGui.QPushButton("Settings")
pushButton3 = QtGui.QPushButton("Stop")
vBoxlayout.addWidget(pushButton1)
vBoxlayout.addWidget(pushButton2)
vBoxlayout.addWidget(pushButton3)
tab1.setLayout(vBoxlayout)
# Add tabs
tabs.addTab(tab1,"Tab 1")
tabs.addTab(tab2,"Tab 2")
tabs.addTab(tab3,"Tab 3")
tabs.addTab(tab4,"Tab 4")
# Set title and show
tabs.setWindowTitle('PyQt QTabWidget # pythonspot.com')
tabs.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
Related
I'm trying to learn pyqt5 in python by creating a small application. For one of the windows, I need to add a vertical scroll bar to the window. Now, this window has a table made using QLabel and QLineEdit. Check the picture to get exactly how it looks like.
As you can see there are a lot of chemicals, which goes below the window screen. I have tried numerous approaches but somehow couldn't get the result. If I am able to get the scroll, all the elements get aligned one under another (QVBoxLayout) which is not the way I want the elements to be aligned.
Here's the code I'm using
class ChemicalWindow(QWidget):
def __init__(self,chemicals,data):
super().__init__()
self.layout = QVBoxLayout()
self.setWindowTitle("Chemicals")
self.setMinimumSize(QSize(600,600))
self.setStyleSheet("background-color:#eaf4f4;")
self.chemicals = chemicals
self.data = data
self.createBody()
self.createButtons()
def createBody(self):
headerLabel = QLabel('Chemicals',scroll_widget)
headerLabel.move(265,10)
headerLabel.resize(70,40)
headerLabel.setStyleSheet("color:#000;")
tcLabel = QLabel('Tc',scroll_widget)
tcLabel.move(200,50)
tcLabel.resize(60,30)
tcLabel.setStyleSheet("color:#000;")
pcLabel = QLabel('Pc',scroll_widget)
pcLabel.move(280,50)
pcLabel.resize(60,30)
pcLabel.setStyleSheet("color:#000;")
cpLabel = QLabel('Cp',scroll_widget)
cpLabel.move(360,50)
cpLabel.resize(60,30)
cpLabel.setStyleSheet("color:#000;")
self.chemical_names = self.chemicals.keys()
y_position = 90
# List for keeping chemical inputs variables in form of dict of list -> {A:[chemical_a_tc,chemical_a_pc,chemical_a_cp],
# B:[chemical_b_tc,chemical_b_pc,...],...}
self.chemical_inputs = dict()
# Creating labels for the chemical names
for name in self.chemical_names:
chemicalLabel = QLabel(name,scroll_widget)
chemicalLabel.move(70,y_position)
chemicalLabel.resize(75,30)
chemicalLabel.setStyleSheet("color:#000;")
chemicalLabel.setToolTip(name)
y_position += 40
current_chemical_inputs = dict()
for chemical_input in self.chemicals[name]:
current_chemical_inputs[chemical_input] = QLineEdit(scroll_widget)
self.chemical_inputs[name] = current_chemical_inputs
position_y = 90
for individual_chemical in self.chemical_inputs:
position_x = 160
for chemical_input in self.chemical_inputs[individual_chemical]:
self.chemical_inputs[individual_chemical][chemical_input].setText(str(self.data['chemicals'][individual_chemical][chemical_input]))
self.chemical_inputs[individual_chemical][chemical_input].move(position_x,position_y)
self.chemical_inputs[individual_chemical][chemical_input].resize(80,30)
self.chemical_inputs[individual_chemical][chemical_input].setStyleSheet("color:#000;background-color:#a9d6e5;padding:2px;")
position_x += 90
position_y += 40
def createButtons(self):
close_button = QPushButton('Close',self)
close_button.move(510,550)
close_button.resize(70,30)
close_button.setStyleSheet("background-color:#00509d;color:#fff;")
close_button.clicked.connect(self.closeButton)
def closeButton(self):
self.close()
What am I doing wrong?
Firstly, instead of using .move() to manually place your widgets, you should be using a QLayout (ex. QHBoxLayout or QVBoxLayout). This will automatically space your labels, and you can modify it by adjusting stretch and adding spacers (QSpacerItem). For more complex layouts, you can either nest multiple box layouts, or use a QGridLayout.
Now to address the scrolling:
First, you want to create your scroll area. Make this widget the central widget. Remember to set setWidgetResizable to True.
scroller = QScrollArea()
scroller.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
scroller.resize(self.width(),self.height())
scroller.setWidgetResizable(True)
self.setCentralWidget(scroller)
Next, create your container and add it to the scroll area. All your layout elements (labels, buttons, etc.) should be placed in this container.
self.container = QWidget()
scroller.setWidget(self.container)
Here's the full sample program I created:
import sys
from PyQt5.QtWidgets import QMainWindow, QWidget, QScrollArea, QVBoxLayout, QLabel, QApplication
from PyQt5.QtCore import Qt
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.resize(1100, 800)
scroller = QScrollArea()
scroller.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOn)
self.container = QWidget()
scroller.setWidget(self.container)
scroller.resize(self.width(),self.height())
scroller.setWidgetResizable(True)
self.setCentralWidget(scroller)
self.holderColumn=QVBoxLayout()
txtList=["apple","banana","orange","triangle","circle","square","moon","star","sun","delta"]
objs=list()
for i in txtList:
tempLabel=QLabel()
tempLabel.setText(i)
tempLabel.setFixedSize(300,300)
objs.append(tempLabel)
self.holderColumn.addWidget(tempLabel)
self.container.setLayout(self.holderColumn)
app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()
I did a custom QFileDialog in other to add a label and a check box to it. It works the way I want but the problem is that when you modify this class the style changes since we aren't calling the static method. I'm doing this in a larger project and this change in style isn't aesthetically pleasing to the user, compared to how the whole app looks. Is there a way to style it? I'm sure the style changes due to this options=QtWidgets.QFileDialog.DontUseNativeDialog, but if I take it out, the code won't work. Below is a sample of the code
import sys
from PyQt5 import QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
button = QtWidgets.QPushButton("Open")
button.clicked.connect(self.OpenFile)
button.setStyleSheet('background-color: rgba(53, 53, 53,50)')
save_button = QtWidgets.QPushButton("Save")
# save_button.clicked.connect(self.savingFile)
save_button.setStyleSheet('background-color: rgba(53, 53, 53,50)')
hlayout = QtWidgets.QHBoxLayout()
hlayout.addWidget(button)
hlayout.addWidget(save_button)
lay = QtWidgets.QVBoxLayout(self)
lay.addLayout(hlayout)
def OpenFile(self):
dialog = QtWidgets.QFileDialog(
self,
"Open File",
"",
"Image Files (*.dcm *.DCM *.tif *.tiff *.TIF "
"*.TIFF *.oct *.OCT);;All Files (*)",
supportedSchemes=["file"],
options=QtWidgets.QFileDialog.DontUseNativeDialog,
)
checkBox = QtWidgets.QCheckBox()
labelWidget = QtWidgets.QLabel()
labelWidget.setText("Repeated Frame Averaging")
dialog.layout().addWidget(labelWidget)
dialog.layout().addWidget(checkBox)
dialog.setOption(QtWidgets.QFileDialog.DontUseNativeDialog, True)
if dialog.exec_() == QtWidgets.QDialog.Accepted:
filename = dialog.selectedFiles()[0]
cbSelection = checkBox.isChecked()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
I am new to PyQt perhaps thats why facing this issue. I am trying to make a component inserter for excel sheets. For this purpose I am using QT for interface and using Qlabels within parent class of QMainWindow. On the basis of item selected from Qlist Widget, few Qlabels have to change on mainwindow dynamically Component inserter
As can be seen in above picture, the labels like WCAP-; Part Number and all below needs to change dynamically when the selected items change(when select button is clicked). But what happening is if I choose a different item from list, the previous Label stays and the new label is overlapping it as can be seen from picture below showing overlapping of labels
The code below shows that whenever button "Select" is pressed", label2 (Qlabel2) is formed, how can i delete the previous label whenever select button is pressed so that new Label dynamically replaces the old label.
Thanks a lot in advance.
def Display(self):
self.close()
label1 = QtGui.QLabel("Select the sheet",self)
label1.move(0,15)
self.listwidget = QtGui.QListWidget(self)
self.listwidget.move(0,40)
self.listwidget.resize(150,150)
for i in range(len(self.sheetnames)):
self.listwidget.addItem("%s"%self.sheetnames[i])
btn = QtGui.QPushButton('Select',self)
btn.resize(50,50)
btn.move(170,40)
btn.clicked.connect(self.Selected)
self.show()
def Selected(self):
self.close()
selecteditem = self.listwidget.currentItem().text()
self.sheetindex = self.sheetnames.index(selecteditem)
print self.sheetindex
aa = self.loadsheet.sheet_by_name(selecteditem)
global label2
label2 = QtGui.QLabel("",self)
label2.setText(selecteditem)
label2.move(0,190)
self.show()
self.InputParameters(aa)
You see a new QLabel because you create a new one every time you call Selected. I would initiate the UI at the creation of the widget (in the __init__ method):
def __init__(self):
self.label2 = QtGui.QLabel("",self)
And only update the text of the Qlabel when Selected is executed:
def Selected(self):
self.label2.setText(selecteditem)
About reinitializing all labels with an unknown number of labels and removing the old ones, you might want to look at QLabel.setParent(None). I wrote you a little example:
from PyQt4 import QtGui, QtCore
import sys
class test(QtGui.QWidget):
def __init__(self,parent=None):
self.widget=QtGui.QWidget.__init__(self, parent)
# Button to add labels
self.btnAdd = QtGui.QPushButton('Add')
self.btnAdd.connect(self.btnAdd, QtCore.SIGNAL('clicked()'),self.btnAddPressed)
# Button to remove labels
self.btnRemove = QtGui.QPushButton('Remove')
self.btnRemove.connect(self.btnRemove, QtCore.SIGNAL('clicked()'), self.btnRemovePressed)
# List to keep track of labels
self.labels=[]
# Layout
self.hbox = QtGui.QHBoxLayout()
self.hbox.addWidget(self.btnAdd)
self.hbox.addWidget(self.btnRemove)
self.setLayout(self.hbox)
self.show()
def btnAddPressed(self):
"""Adds a new label."""
self.labels.append(QtGui.QLabel("lbl"+str(len(self.labels)+1), self))
self.hbox.addWidget(self.labels[-1])
def btnRemovePressed(self):
"""Removes last label."""
self.labels[-1].setParent(None)
self.labels.pop(-1)
def main():
#Creating application
app = QtGui.QApplication(sys.argv)
main_win = test()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
If I use tkinter, I can set the option indicatoron = 0, and get an expected effect.
This effect can be achieved with a group of QPushButton, and some additional code, I suppose.
But is it a true way? Maybe, PyQt has an option, as tkinter?
This code gave me an expected effect from tkinter.
from tkinter import *
root = Tk()
var = IntVar()
button1 = Radiobutton(root,indicatoron=0,text=' One Button ',variable=var,value=1)
button2 = Radiobutton(root,indicatoron=0,text=' Two Button ',variable=var,value=2)
button3 = Radiobutton(root,indicatoron=0,text='Three Button',variable=var,value=3)
button1.place(x=4, y=4)
button2.place(x=4, y=30)
button3.place(x=4, y=56)
mainloop()
In PyQt, you can use QPushButton and a QButtonGroup:
from PyQt4 import QtCore, QtGui
class Window(QtGui.QWidget):
def __init__(self):
super(Window, self).__init__()
layout = QtGui.QVBoxLayout(self)
self.buttonGroup = QtGui.QButtonGroup(self)
for text in 'One Two Three'.split():
button = QtGui.QPushButton(text)
button.setCheckable(True)
layout.addWidget(button)
self.buttonGroup.addButton(button)
self.buttonGroup.buttonClicked.connect(self.handleButtons)
def handleButtons(self, button):
print('Button %s Clicked' % button.text())
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
I am new to PyQt5... Simple question here.
I am using PyQt5 to build a simple application. This application has a Main Window containing a QTabWidget with 3 tabs. Once the application starts, all tab pages are empty and get filled later on. When tab pages are empty, I would still like them to appear as blank pages and extend up to the Main Window edges.
I've been trying to achieve this in two ways: using a layout and using the setGeometry function. Yet the tab pages never extend vertically very far, and horizontally they never go beyond the last tab. See code below.
import sys
from PyQt5.QtWidgets import *
class MainWindow(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("Window With Tabs")
self.setGeometry(50,50,400,400)
oTabWidget = QTabWidget(self)
oPage1 = QWidget()
oLabel1 = QLabel("Hello",self)
oVBox1 = QVBoxLayout()
oVBox1.addWidget(oLabel1)
oPage1.setLayout(oVBox1)
oPage2 = QWidget()
oPage2.setGeometry(0,0,400,400)
oPage3 = QWidget()
oPage3.setGeometry(0,0,400,400)
oTabWidget.addTab(oPage1,"Page1")
oTabWidget.addTab(oPage2,"Page2")
oTabWidget.addTab(oPage3,"Page3")
self.show()
if __name__ == "__main__":
app = QApplication(sys.argv)
oMainwindow = MainWindow()
sys.exit(app.exec_())
Any idea how to modify the code so the empty pages will extend up to the edges of Main Window ?
Set a layout on the main widget:
class MainWindow(QWidget):
def __init__(self):
super().__init__()
self.setWindowTitle("Window With Tabs")
self.setGeometry(50,50,400,400)
layout = QVBoxLayout(self)
oTabWidget = QTabWidget(self)
layout.addWidget(oTabWidget)
The setGeometry calls on the other widgets are redundant.
import sys
from PyQt5.QtWidgets import *
class MainWindow(QWidget):
# window object
def __init__(self):
super().__init__()
self.initGUI() # call custom code
def initGUI(self):
self.setWindowTitle("Window With Tabs") # window...
self.setGeometry(50,50,400,400) #...properties
TabW=self.createTabs() # a custom-tab object
layout = QVBoxLayout(self) # main window layout
layout.addWidget(TabW) #populate layout with Tab object
self.show() # display window
def createTabs(self): # create and return Tab object
oPage1 = QWidget() # tabs...
oPage2 = QWidget()
oPage3 = QWidget()
oTabWidget = QTabWidget() # Tabobject
oTabWidget.addTab(oPage1,"Page1") # populate tab object...
oTabWidget.addTab(oPage2,"Page2")
oTabWidget.addTab(oPage3,"Page3")
return oTabWidget # return tab object
if __name__ == "__main__": # Rest is History!
app = QApplication(sys.argv)
oMainwindow = MainWindow()
sys.exit(app.exec_())