Python QTabBar.installEventFilter方法代码示例

# 需要导入模块: from PyQt4.QtGui import QTabBar [as 别名]
# 或者: from PyQt4.QtGui.QTabBar import installEventFilter [as 别名]
class E4SideBar(QWidget):
    """
    Class implementing a sidebar with a widget area, that is hidden or shown, if the
    current tab is clicked again.
    """
    Version = 1
    
    North = 0
    East  = 1
    South = 2
    West  = 3
    
    def __init__(self, orientation = None, delay = 200, parent = None):
        """
        Constructor
        
        @param orientation orientation of the sidebar widget (North, East, South, West)
        @param delay value for the expand/shrink delay in milliseconds (integer)
        @param parent parent widget (QWidget)
        """
        QWidget.__init__(self, parent)
        
        self.__tabBar = QTabBar()
        self.__tabBar.setDrawBase(True)
        self.__tabBar.setShape(QTabBar.RoundedNorth)
        self.__tabBar.setUsesScrollButtons(True)
        self.__tabBar.setDrawBase(False)
        self.__stackedWidget = QStackedWidget(self)
        self.__stackedWidget.setContentsMargins(0, 0, 0, 0)
        self.__autoHideButton = QToolButton()
        self.__autoHideButton.setCheckable(True)
        self.__autoHideButton.setIcon(UI.PixmapCache.getIcon("autoHideOff.png"))
        self.__autoHideButton.setChecked(True)
        self.__autoHideButton.setToolTip(
            self.trUtf8("Deselect to activate automatic collapsing"))
        self.barLayout = QBoxLayout(QBoxLayout.LeftToRight)
        self.barLayout.setMargin(0)
        self.layout = QBoxLayout(QBoxLayout.TopToBottom)
        self.layout.setMargin(0)
        self.layout.setSpacing(0)
        self.barLayout.addWidget(self.__autoHideButton)
        self.barLayout.addWidget(self.__tabBar)
        self.layout.addLayout(self.barLayout)
        self.layout.addWidget(self.__stackedWidget)
        self.setLayout(self.layout)
        
        # initialize the delay timer
        self.__actionMethod = None
        self.__delayTimer = QTimer(self)
        self.__delayTimer.setSingleShot(True)
        self.__delayTimer.setInterval(delay)
        self.connect(self.__delayTimer, SIGNAL("timeout()"), self.__delayedAction)
        
        self.__minimized = False
        self.__minSize = 0
        self.__maxSize = 0
        self.__bigSize = QSize()
        
        self.splitter = None
        self.splitterSizes = []
        
        self.__hasFocus = False # flag storing if this widget or any child has the focus
        self.__autoHide = False
        
        self.__tabBar.installEventFilter(self)
        
        self.__orientation = E4SideBar.North
        if orientation is None:
            orientation = E4SideBar.North
        self.setOrientation(orientation)
        
        self.connect(self.__tabBar, SIGNAL("currentChanged(int)"), 
                     self.__stackedWidget, SLOT("setCurrentIndex(int)"))
        self.connect(e4App(), SIGNAL("focusChanged(QWidget*, QWidget*)"), 
                     self.__appFocusChanged)
        self.connect(self.__autoHideButton, SIGNAL("toggled(bool)"), 
                     self.__autoHideToggled)
    
    def setSplitter(self, splitter):
        """
        Public method to set the splitter managing the sidebar.
        
        @param splitter reference to the splitter (QSplitter)
        """
        self.splitter = splitter
        self.connect(self.splitter, SIGNAL("splitterMoved(int, int)"), 
                     self.__splitterMoved)
        self.splitter.setChildrenCollapsible(False)
        index = self.splitter.indexOf(self)
        self.splitter.setCollapsible(index, False)
    
    def __splitterMoved(self, pos, index):
        """
        Private slot to react on splitter moves.
        
        @param pos new position of the splitter handle (integer)
        @param index index of the splitter handle (integer)
        """
        if self.splitter:
            self.splitterSizes = self.splitter.sizes()
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtGui import QTabBar [as 别名]
# 或者: from PyQt4.QtGui.QTabBar import installEventFilter [as 别名]
class SideBar( QWidget ):
    """ Sidebar with a widget area which is hidden or shown.
        On by clicking any tab, off by clicking the current tab.
    """

    North = 0
    East  = 1
    South = 2
    West  = 3

    def __init__( self, orientation = 2, parent = None ):
        QWidget.__init__( self, parent )

        self.__tabBar = QTabBar()
        self.__tabBar.setDrawBase( True )
        self.__tabBar.setShape( QTabBar.RoundedNorth )
        self.__tabBar.setFocusPolicy( Qt.NoFocus )
        self.__tabBar.setUsesScrollButtons( True )
        self.__tabBar.setElideMode( 1 )
        self.__stackedWidget = QStackedWidget( self )
        self.__stackedWidget.setContentsMargins( 0, 0, 0, 0 )
        self.barLayout = QBoxLayout( QBoxLayout.LeftToRight )
        self.barLayout.setMargin( 0 )
        self.layout = QBoxLayout( QBoxLayout.TopToBottom )
        self.layout.setMargin( 0 )
        self.layout.setSpacing( 0 )
        self.barLayout.addWidget( self.__tabBar )
        self.layout.addLayout( self.barLayout )
        self.layout.addWidget( self.__stackedWidget )
        self.setLayout( self.layout )

        self.__minimized = False
        self.__minSize = 0
        self.__maxSize = 0
        self.__bigSize = QSize()

        self.splitter = None

        self.__tabBar.installEventFilter( self )

        self.__orientation = orientation
        self.setOrientation( orientation )

        self.__tabBar.currentChanged.connect(
                                        self.__stackedWidget.setCurrentIndex )
        return

    def setSplitter( self, splitter ):
        """ Set the splitter managing the sidebar """
        self.splitter = splitter
        return

    def __getIndex( self ):
        " Provides the widget index in splitters "
        if self.__orientation == SideBar.West:
            return 0
        if self.__orientation == SideBar.East:
            return 2
        if self.__orientation == SideBar.South:
            return 1
        return 0

    def __getWidget( self ):
        " Provides a reference to the widget "
        return self.splitter.widget( self.__getIndex() )

    def shrink( self ):
        """ Shrink the sidebar """
        if self.__minimized:
            return

        self.__minimized = True
        self.__bigSize = self.size()
        if self.__orientation in [ SideBar.North, SideBar.South ]:
            self.__minSize = self.minimumHeight()
            self.__maxSize = self.maximumHeight()
        else:
            self.__minSize = self.minimumWidth()
            self.__maxSize = self.maximumWidth()

        self.__stackedWidget.hide()

        sizes = self.splitter.sizes()
        selfIndex = self.__getIndex()

        if self.__orientation in [ SideBar.North, SideBar.South ]:
            newHeight = self.__tabBar.minimumSizeHint().height()
            self.setFixedHeight( newHeight )

            diff = sizes[ selfIndex ] - newHeight
            sizes[ selfIndex ] = newHeight
        else:
            newWidth = self.__tabBar.minimumSizeHint().width()
            self.setFixedWidth( newWidth )

            diff = sizes[ selfIndex ] - newWidth
            sizes[ selfIndex ] = newWidth

        if selfIndex == 0:
            sizes[ 1 ] += diff
#.........这里部分代码省略.........