Python QGraphicsView.scene方法代码示例

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import scene [as 别名]
class BoardGUI(QWidget):
    """cointain the graphical representation of the Board"""

    # ratio of bordersize compared to the size of one base square
    borderRatio = 0.8
    baseRectRatio = 14/15  # 12/13 for normal ratio but looks weird
    stoneScale = 0.46

    # siganl
    stoneClicked = pyqtSignal(tuple)

    def __init__(self, parent, game):
        super().__init__()

        self.initUI(game)

    def initUI(self, game):
        self.board = game.currentBoard
        self.game = game

        self.showCoords = True
        self.scene = QGraphicsScene()

        # grid containing coordinates for the scene
        self.grid = []
        self.drawGrid()

        # initialize and set layout + view
        self.view = QGraphicsView(self.scene)
        self.view.setMouseTracking(True)
        self.view.setViewportUpdateMode(QGraphicsView.FullViewportUpdate)
        self.setMouseTracking(True)
        box = QHBoxLayout()
        box.addWidget(self.view)
        self.setLayout(box)

        # stones for all positions are created and listed in self.pos dict
        self.createPosition()
        self.makeCoords()  # has to be called after drawGrid!

    def resizeEvent(self, e):
        self.view.fitInView(self.view.scene().sceneRect(), Qt.KeepAspectRatio)

    def boardWidth(self):
        """returns the max width fitting into widget"""
        width = self.contentsRect().width()*0.95
        height = self.contentsRect().height()*0.95

        return min(width, height*self.baseRectRatio)

    def boardHeight(self):
        """returns the max width fitting into widget """
        return self.boardWidth()*(1/self.baseRectRatio)

    def makeGrid(self):
        """
        returns coords [[(x, y)]] for the Grid according
         to current window mesures
        """
        # set scenesize to window size
        self.scene.setSceneRect(0, 0, self.boardWidth(), self.boardHeight())
        denom = self.board.size + 2*self.borderRatio
        baseWidth = self.boardWidth() / denom
        baseHeight = self.boardHeight() / denom

        leftOffset = 0.5*baseWidth  # (self.contentsRect().width()-self.boardWidth())/2
        topOffset = 0  # (self.contentsRect().height()-self.boardHeight())/2

        partionWidth = [leftOffset+(self.borderRatio+x)*baseWidth
                        for x in range(self.board.size)]
        partionHeight = [topOffset+(self.borderRatio+x)*baseHeight
                         for x in range(self.board.size)]

        grid = [[(x, y) for x in partionWidth] for y in partionHeight]
        self.grid = grid
        self.baseWidth = baseWidth

    def drawGrid(self):
        """draws the background grid"""
        self.makeGrid()
        for line in self.grid:
            self.scene.addLine(*line[0], *line[-1])
        for (pointT, pointB) in zip(self.grid[0], self.grid[-1]):
            self.scene.addLine(*pointT, *pointB)
        self.drawHoshis()

    def makeCoords(self):
        """ draws Coordinates """
        xLabels = "ABCDEFGHIKLMNOPQRSTUVWXYZ"
        yLabels = list(range(1, 26))
        botGrid = []
        leftGrid = []
        # generate pixel coordinates grids
        for n in range(self.board.size):
            (xBot, yBot) = self.grid[self.board.size-1][n]
            yBot += self.baseWidth*0.4/self.baseRectRatio
            xBot -= self.baseWidth*0.1
            botGrid.append((xBot, yBot))
            (xLeft, yLeft) = self.grid[n][0]
            xLeft -= self.baseWidth*1.2
#.........这里部分代码省略.........

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import scene [as 别名]
class View(QWidget):

    trigger_focus_event = QtCore.pyqtSignal(str)

    def __init__(self, emacs_xid, buffer, view_info):
        super(View, self).__init__()

        self.buffer = buffer

        self.emacs_xid = emacs_xid

        # Init widget attributes.
        self.setWindowFlags(Qt.FramelessWindowHint)
        self.setAttribute(Qt.WA_X11DoNotAcceptFocus, True)
        self.setContentsMargins(0, 0, 0, 0)
        self.installEventFilter(self)

        # Init attributes.
        self.view_info = view_info
        (self.buffer_id, self.x, self.y, self.width, self.height) = view_info.split(":")
        self.x = int(self.x)
        self.y = int(self.y)
        self.width = int(self.width)
        self.height = int(self.height)

        # Build QGraphicsView.
        self.layout = QVBoxLayout(self)
        self.layout.setContentsMargins(0, 0, 0, 0)
        self.graphics_view = QGraphicsView(buffer, self)
        self.graphics_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform | QPainter.TextAntialiasing)
        # Remove damn border from QGraphicsView.
        self.graphics_view.setFrameStyle(0)
        self.graphics_view.setStyleSheet("QGraphicsView {background: transparent; border: 3px; outline: none;}")
        self.layout.addWidget(self.graphics_view)

        # NOTE: show function must start before resize to trigger *first* resizeEvent after show.
        self.show()

        # Resize after show to trigger fit view operation.
        self.resize(self.width, self.height)

    def resizeEvent(self, event):
        # Fit content to view rect just when buffer fit_to_view option is enable.
        if self.buffer.fit_to_view:
            if event.oldSize().isValid():
                self.graphics_view.fitInView(self.graphics_view.scene().sceneRect(), Qt.KeepAspectRatio)
        QWidget.resizeEvent(self, event)

    def eventFilter(self, obj, event):
        # Focus emacs buffer when user click view.
        if event.type() in [QEvent.MouseButtonPress, QEvent.MouseButtonRelease,
                            QEvent.MouseMove, QEvent.MouseButtonDblClick, QEvent.Wheel]:
            # Send mouse event to applicatin view.
            self.trigger_focus_event.emit("{0},{1}".format(event.globalX(), event.globalY()))

            # Stop mouse event.
            return True

        return False

    def showEvent(self, event):
        # NOTE: we must reparent after widget show, otherwise reparent operation maybe failed.
        self.reparent()

        # Make graphics view at left-top corner after show.
        self.graphics_view.verticalScrollBar().setValue(0)
        self.graphics_view.horizontalScrollBar().setValue(0)

    def reparent(self):
        xlib_display = get_xlib_display()

        view_xid = self.winId().__int__()
        view_xwindow = xlib_display.create_resource_object("window", view_xid)
        emacs_xwindow = xlib_display.create_resource_object("window", self.emacs_xid)

        view_xwindow.reparent(emacs_xwindow, self.x, self.y)

        xlib_display.sync()

    def handle_destroy(self):
        self.destroy()