I am making a comics viewer but I have a problem.
So I have made a program that opens a new tab every time we click onto "File" and then "test". When we press on the right and left buttons on the tabs, the value of self.i
(printed in the console) goes up and down.
However, the problem is that the value of self.i
changes no matter the tab on which we push the left and right buttons, and the label I want to display if self.i == 1
only shows onto the last tab opened.
What I need is a way for each tab created to have their own self.i
and the label to be displayed on any tab depending on their own self.i
value. I can not figure out how to do this.
Here is the part that opens new tabs when "test" is clicked:
def Open(self):
self.tab = QWidget()
self.tab.layout = QGridLayout()
self.nextpagebutton = QPushButton(">", self)
self.nextpagebutton.setFixedSize(50, 780)
self.tab.layout.addWidget(self.nextpagebutton, 0, 2)
self.nextpagebutton.clicked.connect(self.readnext)
self.prevpagebutton = QPushButton("<", self)
self.prevpagebutton.setFixedSize(50, 780)
self.tab.layout.addWidget(self.prevpagebutton, 0, 0)
self.prevpagebutton.clicked.connect(self.readprev)
self.n = int(self.n)+1
self.tabs.addTab(self.tab, "Tab "+str(self.n))
self.tab.setLayout(self.tab.layout)
Here is the part that shows a label when self.i equals to 1:
def readnext(self):
self.i+=1
if self.i == 1:
self.label = QLabel("testtext")
self.tab.layout.addWidget(self.label, 0, 1)
print(self.i)
def readprev(self):
self.i-=1
if self.i == 1:
self.label = QLabel("testtext")
self.tab.layout.addWidget(self.label, 0, 1)
print(self.i)
Here is my full program, you can try it, it works:
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QGridLayout, QWidget, QPushButton, QAction, QStatusBar, QToolBar, QTabWidget
from PyQt5.QtCore import QCoreApplication
class FenetrePrincipale(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("Liseuse de Bandes Dessinées")
self.left = 10
self.top = 10
self.width = 900
self.height = 850
self.i = 0
self.setGeometry(self.left, self.top, self.width, self.height)
self.toolbar = QToolBar("Toolbar")
self.layout = QGridLayout()
self.setCentralWidget(QWidget(self))
self.centralWidget().setLayout(self.layout)
self.move(200, 0)
self.addToolBar(self.toolbar)
self.table_widget = MyTableWidget(self)
self.open = QAction("test", self)
self.open.triggered.connect(self.table_widget.Open)
self.setStatusBar(QStatusBar())
self.menuFichier = self.menuBar().addMenu("&File")
self.menuFichier.addAction(self.open)
self.widget=QWidget()
self.widget.setLayout(self.layout)
self.setCentralWidget(self.widget)
self.setCentralWidget(self.table_widget)
self.show()
class MyTableWidget(QWidget):
def __init__(self, parent=None):
super(QWidget, self).__init__(parent)
self.layout = QGridLayout()
self.i = 0
self.n = 0
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.setDocumentMode(True)
self.tabs.setMovable(True)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def Open(self):
self.tab = QWidget()
self.tab.layout = QGridLayout()
self.nextpagebutton = QPushButton(">", self)
self.nextpagebutton.setFixedSize(50, 780)
self.tab.layout.addWidget(self.nextpagebutton, 0, 2)
self.nextpagebutton.clicked.connect(self.readnext)
self.prevpagebutton = QPushButton("<", self)
self.prevpagebutton.setFixedSize(50, 780)
self.tab.layout.addWidget(self.prevpagebutton, 0, 0)
self.prevpagebutton.clicked.connect(self.readprev)
self.n = int(self.n)+1
self.tabs.addTab(self.tab, "Tab "+str(self.n))
self.tab.setLayout(self.tab.layout)
def readnext(self):
self.i+=1
if self.i == 1:
self.label = QLabel("testtext")
self.tab.layout.addWidget(self.label, 0, 1)
print(self.i)
def readprev(self):
self.i-=1
if self.i == 1:
self.label = QLabel("testtext")
self.tab.layout.addWidget(self.label, 0, 1)
print(self.i)
app = QCoreApplication.instance()
if app is None:
app = QApplication(sys.argv)
window = FenetrePrincipale()
window.show()
app.exec_()
Here is the answer !
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel, QGridLayout, QWidget, QPushButton, QAction, QStatusBar, QToolBar, QTabWidget
from PyQt5.QtCore import QCoreApplication
class FenetrePrincipale(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("Liseuse de Bandes Dessinées")
self.left = 10
self.top = 10
self.width = 900
self.height = 850
self.i = 0
self.setGeometry(self.left, self.top, self.width, self.height)
self.toolbar = QToolBar("Toolbar")
self.layout = QGridLayout()
self.setCentralWidget(QWidget(self))
self.centralWidget().setLayout(self.layout)
self.move(200, 0)
self.addToolBar(self.toolbar)
self.table_widget = MyTableWidget(self)
self.open = QAction("test", self)
self.open.triggered.connect(self.table_widget.Open)
self.setStatusBar(QStatusBar())
self.menuFichier = self.menuBar().addMenu("&File")
self.menuFichier.addAction(self.open)
self.widget = QWidget()
self.widget.setLayout(self.layout)
self.setCentralWidget(self.widget)
self.setCentralWidget(self.table_widget)
self.show()
class MyTableWidget(QWidget):
def __init__(self, parent=None):
super(QWidget, self).__init__(parent)
self.layout = QGridLayout()
self.i = {} # your self.i is now a dict
self.n = 0
self.index = {}
self.tab = {}
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.setDocumentMode(True)
self.tabs.setMovable(True)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def Open(self):
n = str(self.n)
self.i[n] = 0 # assign new key as you make a tab
self.tab[n] = QWidget() # differentiate the tabs so we can call it back later when adding label
self.tab[n].objectName()
self.tab[n].layout = QGridLayout()
self.nextpagebutton = QPushButton(">", self)
self.nextpagebutton.setObjectName('>{}'.format(self.n)) # Give a unique name
self.nextpagebutton.setFixedSize(50, 780)
self.tab[n].layout.addWidget(self.nextpagebutton, 0, 2)
self.nextpagebutton.clicked.connect(self.readnext)
self.prevpagebutton = QPushButton("<", self)
self.prevpagebutton.setObjectName('<{}'.format(self.n)) # Give a unique name
self.prevpagebutton.setFixedSize(50, 780)
self.tab[n].layout.addWidget(self.prevpagebutton, 0, 0)
self.prevpagebutton.clicked.connect(self.readprev)
self.index[n] = self.tabs.addTab(self.tab[n], "Tab " + str(self.n))
self.tab[n].setLayout(self.tab[n].layout)
self.n = int(self.n) + 1
print(self.i)
def readnext(self):
name = str(self.sender().objectName()) # get the button's name
identifier = name[-1]
self.i[identifier] += 1
if self.i[identifier] == 1:
self.label = QLabel("testtext")
self.tab[identifier].layout.addWidget(self.label, 0, 1)
print(self.i)
def readprev(self):
name = str(self.sender().objectName()) # get the button's name
identifier = name[-1]
self.i[identifier] -= 1
if self.i[identifier] == 1:
self.label = QLabel("testtext")
self.tab[identifier].layout.addWidget(self.label, 0, 1)
print(self.i)
app = QCoreApplication.instance()
if app is None:
app = QApplication(sys.argv)
window = FenetrePrincipale()
window.show()
app.exec_()
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