Python QGraphicsView.fitInView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 fitInView [as 别名]
 def actionPrintSlot(self) -> None:
     printer = QPrinter()
     printer.setPageOrientation(QPageLayout.Landscape)
     if QPrintDialog(printer).exec_():
         painter = QPainter(printer)
         painter.setRenderHint(QPainter.Antialiasing)
         view = QGraphicsView()
         view.setScene(self.scene)
         view.setSceneRect(QRectF(0, 0, 290, 200))
         view.fitInView(QRectF(0, 0, 290, 200), Qt.KeepAspectRatio)
         view.scale(1, -1)
         view.render(painter)
         del painter  # necessary, thanks Qt

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import fitInView [as 别名]
def main():

    app = QApplication(sys.argv)

    grview = QGraphicsView()
    scene = QGraphicsScene()
    scene.setSceneRect(0, 0, 680, 459)

    scene.addPixmap(QPixmap('../images/phototest.tif'))
    grview.setScene(scene)

    item = AreaItem(0, 0, 300, 150)
    item.areaColor = QColor(155, 155, 0, 75)
    scene.addItem(item)

    grview.fitInView(scene.sceneRect(), Qt.KeepAspectRatio)
    grview.show()
    sys.exit(app.exec_())

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

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import fitInView [as 别名]
    w = QtWidgets.QWidget()
    v = QGraphicsView()

    def quit():
        print("Connection closed by server")
        app.quit()

    iface = NetworkInterface()
    t = QtCore.QThread()
    iface.moveToThread(t)
    t.start()
    QtCore.QMetaObject.invokeMethod(iface, "run", Qt.QueuedConnection)

    scene = QGraphicsScene(v)
    v.setRenderHints(QtGui.QPainter.HighQualityAntialiasing)
    v.setScene(scene)

    size = blobs.BOARD_SIZE
    v.fitInView(0, 0, size, size)
    field = GameField(size, scene)
    iface.dataReceived.connect(field.update, Qt.QueuedConnection)
    iface.connectionClosed.connect(quit)

    w.setLayout(QtWidgets.QHBoxLayout())
    w.resize(800, 600)
    w.layout().addWidget(v)
    w.setWindowFlags(Qt.Dialog)
    w.show()
    
    app.exec_()

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import fitInView [as 别名]

#.........这里部分代码省略.........
        data : ndarray
            1D vector containing the data only

        This function can be called by self.display_window (which reads the
        data for the selected channel) or by the mouse-events functions in
        traces (which read chunks of data from the user-made selection).
        """
        value = self.config.value
        self.scene = QGraphicsScene(value['x_min'], value['y_min'],
                                    value['x_max'] - value['x_min'],
                                    value['y_max'] - value['y_min'])
        self.idx_fig.setScene(self.scene)

        self.add_grid()
        self.resizeEvent(None)

        s_freq = self.parent.traces.data.s_freq
        f, Pxx = welch(data, fs=s_freq,
                       nperseg=int(min((s_freq, len(data)))))  # force int

        freq_limit = (value['x_min'] <= f) & (f <= value['x_max'])

        if self.config.value['log']:
            Pxx_to_plot = log(Pxx[freq_limit])
        else:
            Pxx_to_plot = Pxx[freq_limit]

        self.scene.addPath(Path(f[freq_limit], Pxx_to_plot),
                           QPen(QColor(LINE_COLOR), LINE_WIDTH))

    def add_grid(self):
        """Add axis and ticks to figure.

        Notes
        -----
        I know that visvis and pyqtgraphs can do this in much simpler way, but
        those packages create too large a padding around the figure and this is
        pretty fast.

        """
        value = self.config.value

        # X-AXIS
        # x-bottom
        self.scene.addLine(value['x_min'], value['y_min'],
                           value['x_min'], value['y_max'],
                           QPen(QColor(LINE_COLOR), LINE_WIDTH))
        # at y = 0, dashed
        self.scene.addLine(value['x_min'], 0,
                           value['x_max'], 0,
                           QPen(QColor(LINE_COLOR), LINE_WIDTH, Qt.DashLine))
        # ticks on y-axis
        y_high = int(floor(value['y_max']))
        y_low = int(ceil(value['y_min']))
        x_length = (value['x_max'] - value['x_min']) / value['x_tick']
        for y in range(y_low, y_high):
            self.scene.addLine(value['x_min'], y,
                               value['x_min'] + x_length, y,
                               QPen(QColor(LINE_COLOR), LINE_WIDTH))
        # Y-AXIS
        # left axis
        self.scene.addLine(value['x_min'], value['y_min'],
                           value['x_max'], value['y_min'],
                           QPen(QColor(LINE_COLOR), LINE_WIDTH))
        # larger ticks on x-axis every 10 Hz
        x_high = int(floor(value['x_max']))
        x_low = int(ceil(value['x_min']))
        y_length = (value['y_max'] - value['y_min']) / value['y_tick']
        for x in range(x_low, x_high, 10):
            self.scene.addLine(x, value['y_min'],
                               x, value['y_min'] + y_length,
                               QPen(QColor(LINE_COLOR), LINE_WIDTH))
        # smaller ticks on x-axis every 10 Hz
        y_length = (value['y_max'] - value['y_min']) / value['y_tick'] / 2
        for x in range(x_low, x_high, 5):
            self.scene.addLine(x, value['y_min'],
                               x, value['y_min'] + y_length,
                               QPen(QColor(LINE_COLOR), LINE_WIDTH))

    def resizeEvent(self, event):
        """Fit the whole scene in view.

        Parameters
        ----------
        event : instance of Qt.Event
            not important

        """
        value = self.config.value
        self.idx_fig.fitInView(value['x_min'],
                               value['y_min'],
                               value['x_max'] - value['x_min'],
                               value['y_max'] - value['y_min'])

    def reset(self):
        """Reset widget as new"""
        self.idx_chan.clear()
        if self.scene is not None:
            self.scene.clear()
        self.scene = None