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from PyQt5.QtWidgets import QTabBar, QPushButton, QTabWidget
from PyQt5.QtCore import pyqtSignal, QSize
class tabBarPlus(QTabBar):
layoutChanged = pyqtSignal()
def resizeEvent(self, event):
super().resizeEvent(event)
self.layoutChanged.emit()
def tabLayoutChange(self):
super().tabLayoutChange()
self.layoutChanged.emit()
class customTabWidget(QTabWidget):
plusClicked = pyqtSignal()
def __init__(self, parent=None):
super(customTabWidget, self).__init__(parent)
self.tab = tabBarPlus()
self.setTabBar(self.tab)
self.plusButton = QPushButton('+', self)
self.plusButton.setFixedSize(35, 25)
self.plusButton.clicked.connect(self.plusClicked.emit)
self.setMovable(True)
self.setTabsClosable(True)
self.tab.layoutChanged.connect(self.movePlusButton)
def movePlusButton(self):
size = sum([self.tab.tabRect(i).width() for i in range(self.tab.count())])
h = max(self.tab.geometry().bottom() - 25, 0)
w = self.tab.width()
if size > w:
self.plusButton.move(w-self.plusButton.width(), h)
else:
self.plusButton.move(size-3, h)
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