将选项卡从一个QtabBar拖放到拆分小部件PyQt Q中的其他QtabBar

Question

我如何归档： -我需要将一个标签从它的标签栏拖放到一个拆分的小部件中的其他标签栏？ 我已经将QtabBar子类化并实现拖放事件，我已经可以用正确的pixmap等来拖动它，也可以将它放到同一个选项卡栏中，但不能放在另一个选项卡栏中。。 在输出中出现这个错误，告诉我我没有提供正确的参数，这里是代码，我简化了make it和example，加上窗口的.JPG。

class EsceneTest(qg.QMainWindow):
    def __init__(self,parent=getMayaWindow()):
        super(EsceneTest,self).__init__(parent)
        #---------------------------------------------------------#        
        #check for open Window first
        winName = windowTitle
        if cmds.window(winName, exists =1):
            cmds.deleteUI(winName, wnd=True)

        self.setAttribute(qc.Qt.WA_DeleteOnClose) 
        self._initUI()      

    def _initUI(self):                     
        self.setObjectName(windowObject)
        self.setWindowTitle(windowTitle)
        self.setMinimumWidth(450)
        self.setMinimumHeight(500)
        self.resize(1080, 800) # re-size the window
        centralWidget = qg.QWidget()
        centralWidget.setObjectName('centralWidget')
        self.setCentralWidget(centralWidget)
        central_layout = qg.QVBoxLayout(centralWidget)

        ######################
        # tab container
        #
        self.tabWidget = qg.QTabWidget()
        self.tabWidget.setAcceptDrops(True)
        self.tab_layout = qg.QVBoxLayout(self.tabWidget)
        central_layout.addWidget(self.tabWidget)

        #######################
        # TabBar
        #                 
        custom_tabbar = ColtabBar()
        self.tabWidget.setTabBar(custom_tabbar)        

        #######################
        # ViewportTab
        #         
        tabCentral_wdg = qg.QWidget()
        self.top_lyt = qg.QVBoxLayout(tabCentral_wdg)
        self.tab_layout.addLayout(self.top_lyt)       

        fixedHBox_lyt = qg.QHBoxLayout()
        self.top_lyt.addLayout(fixedHBox_lyt)   
        self.tabWidget.addTab(tabCentral_wdg,'- Viewport')

        #######################
        # Example ExtraTab
        #        
        tabTwo_wdg = qg.QWidget()
        tabTwo_wdg_lyt = qg.QHBoxLayout(tabTwo_wdg)
        self.tab_layout.addLayout(tabTwo_wdg_lyt)        
        label = qg.QLabel(' -- This is an example -- ')
        label.setStyleSheet("""
                            background : qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 rgb(53, 57, 60), stop:1 rgb(33, 34, 36));
                            border-style : none;
                            font-size: 40px;
                            font-family: Calibri;
                            color : rgb(200,200,100);
                        """)
        label.setAlignment(qc.Qt.AlignVCenter | qc.Qt.AlignHCenter )
        tabTwo_wdg_lyt.addWidget(label)       
        tab_panel_lyt = qg.QVBoxLayout(label)    
        self.tabWidget.addTab(tabTwo_wdg,'- ExtraExample') 

        ############################
        #   Q Splitter Widget to insert the dragged Tabs
        #
        split = qg.QSplitter(qc.Qt.Orientation.Vertical, self)
        central_layout.addWidget(split)
        tab_splitted = qg.QTabWidget()
        split.setLayout(qg.QVBoxLayout())
        split.insertWidget(0,tab_splitted)
        tabBar_2 = ColtabBar()
        tab_splitted.setTabBar(tabBar_2)
        tabBar_2.addTab('- Insert-Here')
#---------------------------------------------------------------------------------------------#

class ColtabBar(qg.QTabBar):
    def __init__(self):
        super(ColtabBar, self).__init__()
        self.indexTab = None        
        self.setAcceptDrops(True)   

    ##################################
    # Events
    def mouseMoveEvent(self, e):
        if e.buttons() != qc.Qt.MiddleButton:
            return

        globalPos = self.mapToGlobal(e.pos())
        posInTab = self.mapFromGlobal(globalPos)
        self.indexTab = self.tabAt(e.pos())
        tabRect = self.tabRect(self.indexTab)


        pixmap = qg.QPixmap(tabRect.size())
        self.render(pixmap,qc.QPoint(),qg.QRegion(tabRect))
        mimeData = qc.QMimeData()
        drag = qg.QDrag(self)
        drag.setMimeData(mimeData)
        drag.setPixmap(pixmap)

        cursor = qg.QCursor(qc.Qt.OpenHandCursor)    
        drag.setHotSpot(e.pos() - posInTab)
        drag.setDragCursor(cursor.pixmap(),qc.Qt.MoveAction)       
        dropAction = drag.exec_(qc.Qt.MoveAction)


    def mousePressEvent(self, e):
        #super(qg.QWidget).mousePressEvent(e)
        if e.button() == qc.Qt.RightButton:
            print('press')

        if e.button() == qc.Qt.LeftButton:            
            globalPos = self.mapToGlobal(e.pos())
            posInTab = self.mapFromGlobal(globalPos)
            self.indexTab = self.tabAt(e.pos())
            self.setCurrentIndex(self.indexTab)

    def dragEnterEvent(self, e):
        e.accept()


    def dropEvent(self, e):
        e.setDropAction(qc.Qt.MoveAction)
        e.accept()        
        self.insertTab(self.indexTab, self.tabText(self.indexTab)) 
        self.removeTab(self.indexTab)

ColtabBar是im执行拖放事件的子类。

图像->；

Answer 1

经过几个小时，今天在网上吃了很多Qt的页面，我用我的方式做到了，现在我可以从一个选项卡栏拖放选项卡到另一个选项卡栏，反之亦然，而不仅仅是选择当前选项卡，我可以在选项卡栏中选择我想要的每个选项卡，并在拖动时显示小选项卡的pixmap。。。在

代码如下：

**已编辑**

我使它更防弹，我有一个错误，当我使用超过2个标签与索引，现在是更好的工作，当我把它放在同一个小部件，它返回事件，不执行代码，加上鼠标右键选择悬停选项卡。。我希望这对将来的任何人都有帮助。在

TABINDEX = int()

def getTabIndex(index):
    global TABINDEX
    if index == -1 or index == TABINDEX:
        return
    TABINDEX = index
    print (TABINDEX)
    return TABINDEX


class ColtTab(qg.QTabWidget):
    def __init__(self):
        super(ColtTab,self).__init__()
        self.setAcceptDrops(True)
        self.tabBar = self.tabBar()
        self.tabBar.setMouseTracking(True)
        self.setDocumentMode(True)
        self.indexTab = int()
        self.setMovable(True)
        self.setStyleSheet(style_sheet_file)


    # test for hovering and selecting tabs automatic while mouser over then - not working for now...
    def eventFilter(self, obj, event):
        if obj == self.tabBar:
            if event.type() == qc.QEvent.MouseMove:
                index=self.tabBar.tabAt(event.pos())
                self.tabBar.setCurrentIndex (index)
                return True
            else:
                return
        else:
            return

    ##################################
    # Events
    #
    def mouseMoveEvent(self, e):
        if e.buttons() != qc.Qt.MiddleButton:
            return

        globalPos = self.mapToGlobal(e.pos())
        #print(globalPos)
        tabBar = self.tabBar
        #print(tabBar)
        posInTab = tabBar.mapFromGlobal(globalPos)
        #print(posInTab)
        self.indexTab = tabBar.tabAt(e.pos())
        #print(self.indexTab)
        tabRect = tabBar.tabRect(self.indexTab)
        #print(tabRect)
        #print(tabRect.size())

        pixmap = qg.QPixmap(tabRect.size())
        tabBar.render(pixmap,qc.QPoint(),qg.QRegion(tabRect))
        mimeData = qc.QMimeData()
        drag = qg.QDrag(tabBar)
        drag.setMimeData(mimeData)
        drag.setPixmap(pixmap)
        cursor = qg.QCursor(qc.Qt.OpenHandCursor)
        drag.setHotSpot(e.pos() - posInTab)
        drag.setDragCursor(cursor.pixmap(),qc.Qt.MoveAction)
        dropAction = drag.exec_(qc.Qt.MoveAction)


    def mousePressEvent(self, e):
        if e.button() == qc.Qt.RightButton:
            self.tabBar.installEventFilter(self)
            print('Right button pressed')

        super(ColtTab, self).mousePressEvent(e)


    def dragEnterEvent(self, e):
        e.accept()
        if e.source().parentWidget() != self:
            return

        # Helpper function for retreaving the Tab index into a global Var
        getTabIndex(self.indexOf(self.widget(self.indexTab)))


    def dragLeaveEvent(self,e):
        e.accept()


    def dropEvent(self, e):
        if e.source().parentWidget() == self:
            return

        e.setDropAction(qc.Qt.MoveAction)
        e.accept()
        counter = self.count()

        if counter == 0:
            self.addTab(e.source().parentWidget().widget(TABINDEX),e.source().tabText(TABINDEX))
        else:
            self.insertTab(counter + 1 ,e.source().parentWidget().widget(TABINDEX),e.source().tabText(TABINDEX))

        print ('Tab dropped')

    def mouseReleaseEvent(self, e):
        if e.button() == qc.Qt.RightButton:
            print('Right button released')
            self.tabBar.removeEventFilter(self)

        super(ColtTab, self).mouseReleaseEvent(e)


    #                                        -#

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