Python QPoint.setY方法代码示例

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
	def readSettings(self):
		self.imageFolder = os.path.normpath(str(self.settings.value("imageFolder").toString()))
		self.ui.actionIgnore_Transparent_Pixels.setChecked( self.settings.value("ignoreAlpha", True).toBool())
		self.ui.actionCheck_for_update_at_start.setChecked( self.settings.value("checkupdate", True).toBool())
		self.ui.tolerance_le.setText( self.settings.value("tolerance").toString())
		self.settings.beginGroup("/geometry")
		p = QPoint()  # position
		s = QSize()  # size

		x = self.settings.value("X", -1).toInt()[0]
		y = self.settings.value("Y", -1).toInt()[0]
		# don't position outside current screen
		qRect = QtGui.QDesktopWidget.availableGeometry(app.desktop())
		if x > qRect.right():
			x = 10
		if y > qRect.bottom():
			y = 10
		p.setX(x)
		p.setY(y)
		s.setWidth(self.settings.value("W", -1).toInt()[0])
		s.setHeight(self.settings.value("H", -1).toInt()[0])
		self.settings.endGroup()
		if p.x() > 0 and p.y() > 0 and s.width() > 0 and s.height() > 0:
			self.resize(s)  # restore size
			self.move(p)  # restore position

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
class MovingMessage(FadeMessage):
    def __init__(self, message, str = None, pos = None):
        cfg = Config('messages', message)
        
        if (pos is None):
            self.pos = QPoint(*cfg.get('position'))
        else:
            self.pos = QPoint(*pos)
        
        self.velocity = cfg.get('velocity') 
        
        FadeMessage.__init__(self, message, str)
    
    def with_controller(self):
        self.rect = QRect(0, 0, self.controller.width(), self.controller.height())
        self.rect.moveCenter(self.pos)

    def tick(self, elapsed):        
        FadeMessage.tick(self, elapsed)

        self.pos.setX(self.pos.x() + self.velocity[0] * elapsed)
        self.pos.setY(self.pos.y() + self.velocity[1] * elapsed)
        
        self.rect.moveCenter(self.pos)
    
    def draw(self):
        FadeMessage.draw(self)
        
        if (self.color.alpha() == 0):
            self.rect = self.bounding_text_rect

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
	def open_link(self, x, y):
		self.__upostda_condition.acquire()
		p = QPoint()
		p.setX(int(x))
		p.setY(int(y))
		self.emit(QtCore.SIGNAL('signalUPosDA(QPoint *)'), p)
		self.__upostda_condition.wait()
		self.__upostda_condition.release()

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
 def tryMove(self, oldPos, newPos, directions):
     p = QPoint(oldPos)
     if directions & 1: #X轴方向
         gridX = self.parent().width() / 40
         delta = newPos.x() - oldPos.x()
         if abs(delta) / gridX > 0.5:
             newX = oldPos.x() + delta / abs(delta) * gridX * round(abs(delta) / gridX)
             newX = gridX * round(newX / gridX)
             p.setX(newX)
     if directions & 2:
         gridY = self.parent().height() / 30
         delta = newPos.y() - oldPos.y()
         if abs(delta) / gridY > 0.5:
             newY = oldPos.y() + delta / abs(delta) * gridY * round(abs(delta) / gridY)
             newY = gridY * round(newY / gridY)
             p.setY(newY)
     return p

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
    def adjustPosition(self, eventPos):
        '''
        @param eventPos - QPoint
        '''
        prop = MaeMoneyProperties.instance()

        newPos = QPoint(eventPos.x(), eventPos.y())
        if prop.isPortraitMode():
            offset = 50
        else:
            offset = 72

        newY = max(0, eventPos.y() - offset)
        newPos.setY(newY)


        return newPos

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
 def kineticAddDelta(self, delta ):
     """Add a kinetic delta to an already started kinetic move."""
     speed = QPoint(0,0)
     
     # Get the remaining scroll amount.
     currentSpeed = abs( self._kineticData._speed.y() )
     leftToScroll = (currentSpeed+1)*currentSpeed / 2 ;
     if self._kineticData._speed.y() < 0:
         leftToScroll *= -1
     leftToScroll += delta
     
     speed.setY((sqrt(1+8*abs(leftToScroll))-1)/2)
     speed.setX( self._kineticData._speed.x() )
     if leftToScroll < 0:
         speed.setY(-speed.y())
         
     self.kineticStart(speed)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
    def paintEvent(self, event):
        def _drawitem(pixmap, text, itempostion):
            painter.drawPixmap(itempostion, pixmap)
            textrect = QRectF(pixmap.width() + 40,
                              itempostion.y(),
                              framerect.width() - pixmap.width() - 40,
                              pixmap.height())
            painter.drawText(textrect, text, QTextOption(Qt.AlignVCenter))

        if not self.pixmap:
            return

        painter = QPainter(self)
        painter.setRenderHints(QPainter.Antialiasing)
        painter.drawPixmap(event.rect(), self.pixmap)

        rect = event.rect()
        framerect = QRect(rect)
        newwidth = (rect.width() / 100) * 40
        framerect.setWidth(newwidth)
        painter.setBrush(self.legendareabrush)
        painter.setPen(self.legendareapen)
        painter.drawRect(framerect)
        self.framerect = framerect

        painter.setPen(Qt.black)

        currenty = 40
        position = rect.topLeft() + QPoint(30, currenty)
        for layer, items in self.items.iteritems():
            if len(items) == 1:
                itempostion = QPoint(position)
                itempostion.setY(currenty)
                _drawitem(items[0][1], layer, itempostion)
                currenty += 40
            else:
                for text, icon in items:
                    if not text:
                        continue
                    itempostion = QPoint(position)
                    itempostion.setY(currenty)
                    _drawitem(icon, text, itempostion)
                    currenty += 40

            position.setY(currenty + 40)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
  def drawXInfos(self):
    pen = self.painter.pen()
    i = 1
    scale = 6
    x = self.yLeftMargin
    y = self.ploter.height - self.m
    if not self.selDateMin:
      date = self.baseDateMin
      shift_date = (self.baseDateMax - self.baseDateMin) / scale
    else:
      date = self.selDateMin
      shift_date = (self.selDateMax - self.selDateMin) / scale
    while i <= scale + 1:
      pen.setColor(Qt.black)
      pen.setStyle(Qt.SolidLine)
      pos = QPoint(x - 40, y + 17)
      self.painter.setPen(pen)
# Draw vertical doted line
      self.painter.drawLine(x, y - 3, x, y + 3)
# Draw date
      self.painter.drawText(pos, str(self.timeline.fromUSec(date).strftime('%d.%m.%Y')))
# If number of days shown < scale, draw time
      if shift_date <= (86400 * 1000000):
        pos.setY(pos.y() + 15)
        pos.setX(pos.x() + 9)
# Draw time
        self.painter.drawText(pos, str(self.timeline.fromUSec(date).strftime('%H:%M:%S')))
      
      pen.setColor(Qt.gray)
      pen.setStyle(Qt.DotLine)
      self.painter.setPen(pen)
      if i != 1:
        self.painter.drawLine(x, y + 3, x, self.m / 3)
      x = self.yLeftMargin + (i * ((self.ploter.width - self.m - self.yLeftMargin) / (scale)))
      i += 1
      date += shift_date
    pen.setStyle(Qt.SolidLine)
    self.painter.setPen(pen)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]

#.........这里部分代码省略.........
        # frameBufferA.bind()
        # frameBufferA.release()

        glViewport(0, 0, self.width(), self.height())

        orthoMatrix = QMatrix4x4()
        orthoMatrix.ortho(
            0 + self.__scrollOffset.x(),
            self.width() + self.__scrollOffset.x(),
            self.height() + self.__scrollOffset.y(),
            0 + self.__scrollOffset.y(),
            -100,
            100,
        )
        transformMatrix = QMatrix4x4()
        transformMatrix.setToIdentity()
        transformMatrix.scale(self.__zoomFactor)

        ### activate shader program
        # self.__shaderProgram.bind()
        ### set a shader attribute (0 means use texture, 1 means use color)
        # self.__shaderProgram.setUniformValue(self.__use_color_location, 0.0)

        ### feed the mpv matrix
        mpvMatrix = orthoMatrix * transformMatrix
        # self.__shaderProgram.setUniformValue(self.__mvpMatrixLocation, mpvMatrix)

        # Draw Something
        self.__myBufferPainter.paintGL(
            self.__scrollOffset.x(), self.__scrollOffset.y(), self.width(), self.height(), self.__zoomFactor, mpvMatrix
        )

        """
        ### DRAW SOMETHING
        ### bind texture
        glBindTexture(GL_TEXTURE_2D, self.__ori_tex)
        ### bind VAO
        glBindVertexArray(self.__VAO)
        ### draw triangle
        glDrawArrays(GL_TRIANGLES, 0, 18)
        """

        ### unbind
        # glBindVertexArray(0)
        # glUseProgram(0)
        # self.__shaderProgram.release()

    def SetSomething(self):
        pass

    def DrawSomething(self):
        pass

    def ZoomIn(self):
        self.__zoomFactor += 0.1

    def ZoomOut(self):
        self.__zoomFactor -= 0.1
        if self.__zoomFactor < 0.1:
            self.__zoomFactor = 0.1

    """
    Get / Set
    """

    def GetImageSize(self):
        """
        Get the size of the canvas / image
        """
        return QSize(self.__image_width, self.__image_height)

    def SetZoomFactor(self, val):
        """
        Set the value of magnification
        """
        self.__zoomFactor = val

    def GetZoomFactor(self):
        """
        Obtain the value of the magnification
        """
        return self.__zoomFactor

    def SetMouseDown(self, val):
        """
        Set the value of mouse down
        """
        self.__isMouseDown = val

    def SetHorizontalScroll(self, val):
        """
        Set horizontal scroll value
        """
        self.__scrollOffset.setX(val)

    def SetVerticalScroll(self, val):
        """
        Set vertical scroll value
        """
        self.__scrollOffset.setY(val)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
    def paintEvent(self, event):
        def itemlist(items):
            for layer, items in self.items.iteritems():
                if len(items) == 1:
                    yield layer, items[0][1]
                else:
                    for text, icon in items:
                        if not text:
                            continue
                        yield text, icon

        def _drawitem(pixmap, text, itempostion):
            painter.drawPixmap(itempostion, pixmap)
            textrect = QRectF(pixmap.width() + currentx + 10,
                              itempostion.y(),
                              event.rect().width() - pixmap.width() - OFFSET_X,
                              pixmap.height())
            painter.drawText(textrect, text, QTextOption(Qt.AlignVCenter))

        def calcitems():
            font = painter.font()
            metrices = QFontMetrics(font)
            maxwidth = 0
            maxheight = 0
            for item, _ in itemlist(self.items):
                maxwidth = max(metrices.boundingRect(item).width(), maxwidth)
                maxheight = max(metrices.boundingRect(item).height(), maxheight)
            return maxwidth, maxheight

        if not self.pixmap:
            return

        painter = QPainter(self)
        painter.setRenderHints(QPainter.Antialiasing)
        painter.drawPixmap(event.rect(), self.pixmap)

        itemwidths, itemmaxheight = calcitems()
        OFFSET_X = 30
        OFFSET_Y = itemmaxheight + 10
        rect = event.rect()
        neededheight = (len(self.items) * OFFSET_Y)
        runs = 1
        if neededheight > rect.height():
            import math
            runs = math.ceil(neededheight / float(rect.height()))
            print runs

        framerect = QRect(rect)
        framewidth = (itemwidths + OFFSET_X + ICON_SIZE.width() + 100) * runs
        framerect.setWidth(framewidth)
        painter.setBrush(self.legendareabrush)
        painter.setPen(self.legendareapen)
        painter.drawRect(framerect)
        self.framerect = framerect

        painter.setPen(Qt.black)
        currenty = OFFSET_Y
        currentx = OFFSET_X
        position = rect.topLeft() + QPoint(OFFSET_X, currenty)
        for text, icon in itemlist(self.items):
            itempostion = QPoint(position)
            if currenty > rect.height():
                currentx = itemwidths + OFFSET_X + 100
                currenty = itemmaxheight + 10

            itempostion.setX(currentx)
            itempostion.setY(currenty)

            _drawitem(icon, text, itempostion)
            currenty += OFFSET_Y

        position.setY(currenty + OFFSET_Y)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
class VisionneurImagePourEKD(QScrollArea):
	''' Classe pour l'affichage des images (avec des barres de
	défilement)'''
	def __init__(self, img=None):
		QScrollArea.__init__(self)

		# Déclaration du drapeau: a-t-on chargé un *.gif
		if img and os.path.splitext(img)[1]!=".gif":
			self.gif = 1
		else:
			self.gif = 0
		
		# Facteur de redimensionnement de l'image à afficher par rapport à la taille réelle de l'image
		self.factor = 1
		
		# Variables de paramètres
		self.modeTransformation=Qt.SmoothTransformation
		#self.modeTransformation=Qt.FastTransformation
		
		# widget qui contiendra l'image
		self.imageLabel = QLabel()
		self.imageLabel.setAlignment(Qt.AlignCenter)
		
		self.setBackgroundRole(QPalette.Dark)
		self.setWidget(self.imageLabel)
		# Indispensable pour ne pas avoir d'images tronquées, lors du chargement de nvll img
		self.setWidgetResizable(True)
		
		# Position du curseur dans le QScrollArea au moment du clic de la souris
		self.positionPresseeSourisIni = QPoint()
		# Position du point haut-gauche du QScrollArea par rapport au QPixMap entier au
		# moment du clic de la souris (par la suite appelée "position de la barre de défilement")
        	self.positionBarrePresseeSourisIni = QPoint()
		
		# Création du menu contextuel
		self.menuZoom=QMenu("Zoom")
		
		# Entrée zoom taille réelle
		self.menuTailleReelle=self.menuZoom.addAction(_(u'&Taille Réelle'))
		self.menuTailleReelle.setIcon(QIcon("Icones" + os.sep + "taillereelle.png"))
		self.connect(self.menuTailleReelle, SIGNAL("triggered()"), self.setTailleReelle)
		
		# Entrée zoom taille fenetre
		self.menuTailleFenetre=self.menuZoom.addAction(_(u'&Adapter à la fenêtre'))
		self.menuTailleFenetre.setIcon(QIcon("Icones" + os.sep + "fenetre.png"))
		self.connect(self.menuTailleFenetre, SIGNAL("triggered()"), self.setTailleFenetre)
	
		# Entrée zoom +
		self.menuZoomPlus=self.menuZoom.addAction(_(u'&Zoom Avant'))
		self.menuZoomPlus.setIcon(QIcon("Icones" + os.sep + "zoomplus.png"))
		self.connect(self.menuZoomPlus, SIGNAL("triggered()"), self.zoomAvant)
		
		# Entrée zoom - 
		self.menuZoomMoins=self.menuZoom.addAction(_(u'&Zoom Arrière'))
		self.menuZoomMoins.setIcon(QIcon("Icones" + os.sep + "zoommoins.png"))
		self.connect(self.menuZoomMoins, SIGNAL("triggered()"), self.zoomArriere)
		
		# Entrée mettre en pause/démarrer l'animation du gif
		self.menuStartPauseGif=self.menuZoom.addAction(_(u"Mettre en pause/démarrer l'animation"))
		self.menuStartPauseGif.setIcon(QIcon("Icones" + os.sep + "player_end.png"))
		self.connect(self.menuStartPauseGif, SIGNAL("triggered()"), self.startPauseGif)
			
		# Entrée mettre en pause/démarrer l'animation du gif
		self.menuStopGif=self.menuZoom.addAction(_(u"Arrêter l'animation"))
		self.menuStopGif.setIcon(QIcon("Icones" + os.sep + "player_stop.png"))
		self.connect(self.menuStopGif, SIGNAL("triggered()"), self.stopGif)
		
		# On cache les 2 menus de *.gif si on ne traite pas ce format
		if not self.gif:
			self.menuStartPauseGif.setVisible(False)
			self.menuStopGif.setVisible(False)
		
		# Si une image est en paramètre de classe, on l'affiche directement
		# sinon on pourra toujours l'afficher plus tard en appelant la
		# méthode setImage(), le moment venu
		if img:
			self.setImage(img)
			self.setToolTip(img)
		else:
			# image par défaut
			self.setImage("Icones" + os.sep + "avant-image.png")
			self.setToolTip(_(u"image d'accueil"))
			self.setTailleReelle()
	
	def mousePressEvent(self, event):
		"Menu contextuel et enregistrement de données préparant le déplacement de l'image par pincement"
		
		# Menu contextuel
		if event.button() == Qt.RightButton: 
			self.menuZoom.popup(event.globalPos())
		
		# On enregistre la position du curseur et de la barre de défilement au moment du clic
		elif event.button() == Qt.LeftButton:
			self.positionPresseeSourisIni = QPoint(event.pos())
			self.positionBarrePresseeSourisIni.setX(self.horizontalScrollBar().value())
			self.positionBarrePresseeSourisIni.setY(self.verticalScrollBar().value())
			if PYQT_VERSION_STR >= "4.1.0": 
				# curseur main fermée
				self.setCursor(Qt.ClosedHandCursor)
			else: self.setCursor(Qt.SizeAllCursor)
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
class MikiView(QWebView):

    def __init__(self, parent=None):
        super(MikiView, self).__init__(parent)
        self.parent = parent

        self.settings().clearMemoryCaches()
        self.notePath = parent.settings.notePath
        self.settings().setUserStyleSheetUrl(
            QUrl('file://'+self.parent.settings.cssfile))
        print(QUrl('file://'+self.parent.settings.cssfile))
        self.page().setLinkDelegationPolicy(QWebPage.DelegateAllLinks)

        self.page().linkClicked.connect(self.linkClicked)
        self.page().linkHovered.connect(self.linkHovered)
        self.page().mainFrame(
        ).contentsSizeChanged.connect(self.contentsSizeChanged)

        self.scrollPosition = QPoint(0, 0)

    def linkClicked(self, qurl):
        '''three kinds of link:
            external uri: http/https
            page ref link:
            toc anchor link: #
        '''
        name = qurl.toString()
        http = re.compile('https?://')
        if http.match(name):                        # external uri
            QDesktopServices.openUrl(qurl)
            return

        self.load(qurl)
        name = name.replace('file://', '')
        name = name.replace(self.notePath, '').split('#')
        item = self.parent.notesTree.pageToItem(name[0])
        if not item or item == self.parent.notesTree.currentItem():
            return
        else:
            self.parent.notesTree.setCurrentItem(item)
            if len(name) > 1:
                link = "file://" + self.notePath + "/#" + name[1]
                self.load(QUrl(link))
            viewFrame = self.page().mainFrame()
            self.scrollPosition = viewFrame.scrollPosition()

    def linkHovered(self, link, title, textContent):
        '''show link in status bar
            ref link shown as: /parent/child/pageName
            toc link shown as: /parent/child/pageName#anchor (ToFix)
        '''
        # TODO: link to page by: /parent/child/pageName#anchor
        if link == '':                              # not hovered
            self.parent.statusBar.showMessage(self.parent.notesTree.currentPage())
        else:                                       # beautify link
            link = link.replace('file://', '')
            link = link.replace(self.notePath, '')
            self.parent.statusBar.showMessage(link)

    def contentsSizeChanged(self, newSize):
        '''scroll notesView while editing (adding new lines)
           Whithout this, every `updateView` will result in scroll to top.
        '''
        if self.scrollPosition == QPoint(0, 0):
            return
        viewFrame = self.page().mainFrame()
        newY = self.scrollPosition.y(
        ) + newSize.height() - self.contentsSize.height()
        self.scrollPosition.setY(newY)
        viewFrame.setScrollPosition(self.scrollPosition)

    def updateView(self):
        # url_notebook = 'file://' + os.path.join(self.notePath, '/')
        viewFrame = self.page().mainFrame()
        # Store scrollPosition before update notesView
        self.scrollPosition = viewFrame.scrollPosition()
        self.contentsSize = viewFrame.contentsSize()
        url_notebook = 'file://' + self.notePath + '/'
        self.setHtml(self.parent.notesEdit.toHtml(), QUrl(url_notebook))
        # Restore previous scrollPosition
        viewFrame.setScrollPosition(self.scrollPosition)

    def updateLiveView(self):
        if self.parent.actions.get('split').isChecked():
            QTimer.singleShot(1000, self.updateView)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
    def kineticMove(self, oldx, oldy, newx, newy ):
        """Start a kinetic move from (oldx, oldy) to (newx, newy)"""
        if newx == oldx and newy == oldy:
            return
        
        speed = QPoint(0,0)
        # solve speed*(speed+1)/2 = delta to ensure 1+2+3+...+speed is as close as possible under delta..
        speed.setX((sqrt(1+8*abs(newx-oldx))-1)/2)
        speed.setY((sqrt(1+8*abs(newy-oldy))-1)/2)
        
        # compute the amount of displacement still needed because we're dealing with integer values.
        diff = QPoint(0,0)
        diff.setX(-abs(newx-oldx) + speed.x()*(speed.x()+1)/2)
        diff.setY(-abs(newy-oldy) + speed.y()*(speed.y()+1)/2)

        # Since this function is called for exact moves (not free scrolling)
        # limit the kinetic time to 2 seconds, which means 100 ticks, 5050 pixels.
        if speed.y() > 100:
            speed.setY(100)
            diff.setY(-abs(newy-oldy) + 5050)
            
        # Although it is less likely to go beyond that limit for horizontal scrolling,
        # do it for x as well.
        if speed.x() > 100:
            speed.setX(100)
            diff.setX(-abs(newx-oldx) + 5050)
        
        # move left or right, up or down
        if newx > oldx :
            speed.setX(-speed.x())
            diff.setX(-diff.x())
        if newy > oldy :
            speed.setY(-speed.y())
            diff.setY(-diff.y())
        
        # move immediately by the step that cannot be handled by kinetic scrolling.
        # By construction that step is smaller that the initial speed value.
        self.fastScrollBy(diff)
        
        self.kineticStart(speed)

# 需要导入模块: from PyQt4.QtCore import QPoint [as 别名]
# 或者: from PyQt4.QtCore.QPoint import setY [as 别名]
class MapSwipeTool(QgsMapTool):
  def __init__(self, iface):
    canvas = iface.mapCanvas()
    super(MapSwipeTool, self).__init__( canvas )
    self.view = iface.layerTreeView()
    self.msgBar = iface.messageBar()
    self.swipe = SwipeMap( canvas )
    self.checkDirection =  self.hasSwipe = self.disabledSwipe = None
    self.firstPoint = QPoint()
    self.cursorV = QCursor( Qt.SplitVCursor )
    self.cursorH = QCursor( Qt.SplitHCursor )
  
  def activate(self):
    self.canvas().setCursor( QCursor( Qt.CrossCursor ) )

    self._connect()

    self.hasSwipe = False
    self.disabledSwipe = False
    
    self.setLayersSwipe( self.view.currentIndex() )

  def canvasPressEvent(self, e):
    if len(self.swipe.layers) == 0:
      msg = "Select active Layer or Group(with layers)  in legend."
      self.msgBar.clearWidgets()
      self.msgBar.pushMessage( "MapSwipeTool", msg, QgsMessageBar.WARNING, 4 )
      return
    
    self.hasSwipe = True
    self.firstPoint.setX( e.x() )
    self.firstPoint.setY( e.y() )
    self.checkDirection = True

  def canvasReleaseEvent(self, e):
    self.hasSwipe = False
    self.canvas().setCursor( QCursor( Qt.CrossCursor ) )
    
  def canvasMoveEvent(self, e):
    if self.hasSwipe:
      if self.checkDirection:
        dX = abs( e.x() - self.firstPoint.x() )
        dY = abs( e.y() - self.firstPoint.y() )
        isVertical = dX > dY
        self.swipe.setIsVertical( isVertical )
        self.checkDirection = False
        self.canvas().setCursor( self.cursorH if isVertical else self.cursorV )
        
      self.swipe.setLength( e.x(), e.y() )

  def _connect(self, isConnect = True):
    signal_slot = (
      { 'signal': self.canvas().mapCanvasRefreshed, 'slot': self.swipe.setMap },
      { 'signal': self.view.activated, 'slot': self.setLayersSwipe },
      { 'signal': QgsMapLayerRegistry.instance().removeAll, 'slot': self.disable }
    )
    if isConnect:
      for item in signal_slot:
        item['signal'].connect( item['slot'] )
    else:
      for item in signal_slot:
        item['signal'].disconnect( item['slot'] )

  @pyqtSlot( "QModelIndex" )
  def setLayersSwipe(self, index):
    if self.disabledSwipe:
      return

    ids = msg = None
    node = self.view.currentNode()
    if isinstance( node, QgsLayerTreeLayer ):
      layer = node.layer()
      ids = [ layer.id() ]
      msg = "Active layer is '%s'." % layer.name()
    else:
      group = self.view.currentGroupNode()
      if group.parent() is None: # Root
        return
      ids = group.findLayerIds()
      msg = "Active group is '%s'." % group.name()

    self.swipe.clear()
    self.swipe.setLayersId( ids )
    self.msgBar.clearWidgets()
    self.msgBar.pushMessage( "MapSwipeTool", msg, QgsMessageBar.INFO, 2 )
    self.swipe.setMap()

  @pyqtSlot()
  def disable(self):
    self.swipe.clear()
    self.hasSwipe = False
    self.disabledSwipe = True
  
  def deactivate(self):
      super( MapSwipeTool, self ).deactivate()
      self.deactivated.emit()
      self.swipe.clear()
      self._connect( False )