wandererfan wrote: ↑Fri Oct 19, 2018 1:09 pm
vocx wrote: ↑Thu Oct 18, 2018 11:11 pm
Also, it's not possible to arrange which page goes first and which comes second. This is not a problem when you only have two pages, but if you have ten or more, it becomes cumbersome if you decide to create new pages and views later on.
Not really sure how to go about this. I believe the mainWindow arranges the tabs in the order they are created. I'm not sure if there is a convenient way to reorder the tabs. No promises on this one.
I don't know much Qt but I suspect it's one of the easiest things to do. Many programs nowadays use tabs whether using Gtk+ or Qt, like Gedit, DoubleCommander, Firefox and many others, and changing the order of the tabs is the most normal thing to do. Users practically expect to be able to do this in modern applications.
I searched online and it seems the component that does this is
QTabWidget,
https://stackoverflow.com/questions/167 ... tab-window,
https://forum.qt.io/topic/30974/setting ... qtabwidget
In this thread the users demonstrate a simple program that subclasses
QTabWidget,
https://forum.qt.io/topic/67542/drag-ta ... bwidgets/6 They mention needing to define a couple of functions like
mouseMoveEvent(),
dragMoveEvent(),
dropEvent(), etc., to know what to do with the tab when the mouse drags it.
The example from the aforementioned thread creates two panes with two tabs in each pane. The tabs can be moved with the left mouse button. To move a tab from one pane to the other pane, use the right mouse button.
This is the code
Code: Select all
import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class Tabs(QTabWidget):
def __init__(self, parent):
super().__init__(parent)
self.parent = parent
self.setAcceptDrops(True)
self.tabBar = self.tabBar()
self.tabBar.setMouseTracking(True)
self.indexTab = None
self.setMovable(True)
self.addTab(QWidget(self), 'Tab One')
self.addTab(QWidget(self), 'Tab Two')
def mouseMoveEvent(self, e):
if e.buttons() != Qt.RightButton:
return
globalPos = self.mapToGlobal(e.pos())
tabBar = self.tabBar
posInTab = tabBar.mapFromGlobal(globalPos)
self.indexTab = tabBar.tabAt(e.pos())
tabRect = tabBar.tabRect(self.indexTab)
pixmap = QPixmap(tabRect.size())
tabBar.render(pixmap,QPoint(),QRegion(tabRect))
mimeData = QMimeData()
drag = QDrag(tabBar)
drag.setMimeData(mimeData)
drag.setPixmap(pixmap)
cursor = QCursor(Qt.OpenHandCursor)
drag.setHotSpot(e.pos() - posInTab)
drag.setDragCursor(cursor.pixmap(),Qt.MoveAction)
dropAction = drag.exec_(Qt.MoveAction)
def dragEnterEvent(self, e):
e.accept()
if e.source().parentWidget() != self:
return
print(self.indexOf(self.widget(self.indexTab)))
self.parent.TABINDEX = self.indexOf(self.widget(self.indexTab))
def dragLeaveEvent(self,e):
e.accept()
def dropEvent(self, e):
print(self.parent.TABINDEX)
if e.source().parentWidget() == self:
return
e.setDropAction(Qt.MoveAction)
e.accept()
counter = self.count()
if counter == 0:
self.addTab(e.source().parentWidget().widget(self.parent.TABINDEX),e.source().tabText(self.parent.TABINDEX))
else:
self.insertTab(counter + 1 ,e.source().parentWidget().widget(self.parent.TABINDEX),e.source().tabText(self.parent.TABINDEX))
class Window(QWidget):
def __init__(self):
super().__init__()
self.TABINDEX = 0
tabWidgetOne = Tabs(self)
tabWidgetTwo = Tabs(self)
layout = QHBoxLayout()
self.moveWidget = None
layout.addWidget(tabWidgetOne)
layout.addWidget(tabWidgetTwo)
self.setLayout(layout)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
Save it as
window_tabs.py and you can test it (in Ubuntu 18.04) with
The code works with
python2 but you need to modify the calls to
super(), whose syntax apparently changed from Python 2 to 3. In Python 2 use
Code: Select all
line 9: super(Tabs, self).__init__(parent)
line 73: super(Window, self).__init__()
And then you can run
