Python QGraphicsView.setVerticalScrollBarPolicy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 setVerticalScrollBarPolicy [as 别名]
class CameraWidget(QWidget):

    def __init__(self, background_color):
        QWidget.__init__(self)

        self.scene = QGraphicsScene(self)
        self.scene.setBackgroundBrush(QBrush(background_color))
        self.graphics_view = QGraphicsView(self.scene)
        self.graphics_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setFrameStyle(0)
        self.graphics_view.setStyleSheet("QGraphicsView {background: transparent; border: 3px; outline: none;}")
        self.graphics_view.scale(-1, 1) # this make live video from camero mirror.
        self.video_item = QGraphicsVideoItem()
        self.scene.addItem(self.video_item)

        self.layout = QVBoxLayout(self)
        self.layout.setContentsMargins(0, 0, 0, 0)
        self.layout.addWidget(self.graphics_view)

        self.available_cameras = QCameraInfo.availableCameras()

        # Set the default camera.
        self.select_camera(0)

    def resizeEvent(self, event):
        self.video_item.setSize(QSizeF(event.size().width(), event.size().height()))
        QWidget.resizeEvent(self, event)

    def select_camera(self, i):
        self.camera = QCamera(self.available_cameras[i])
        self.camera.setViewfinder(self.video_item)
        self.camera.setCaptureMode(QCamera.CaptureStillImage)
        self.camera.start()

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

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

        self.scene = QGraphicsScene(self)
        self.scene.setBackgroundBrush(QBrush(QColor(0, 0, 0, 255)))
        self.graphics_view = QGraphicsView(self.scene)
        self.graphics_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.graphics_view.setFrameStyle(0)
        self.graphics_view.setStyleSheet("QGraphicsView {background: transparent; border: 3px; outline: none;}")
        self.video_item = QGraphicsVideoItem()
        self.scene.addItem(self.video_item)

        self.layout = QVBoxLayout(self)
        self.layout.setContentsMargins(0, 0, 0, 0)
        self.layout.addWidget(self.graphics_view)

        self.media_player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
        self.media_player.setVideoOutput(self.video_item)

        self.video_need_replay = False
        self.video_seek_durcation = 3000 # in milliseconds

    def resizeEvent(self, event):
        self.video_item.setSize(QSizeF(event.size().width(), event.size().height()))
        QWidget.resizeEvent(self, event)

    def play(self, url):
        self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(url)))
        self.media_player.play()

    def seek_forward(self):
        video_position = self.media_player.position()
        self.media_player.setPosition(video_position + self.video_seek_durcation)

    def seek_backward(self):
        video_position = self.media_player.position()
        self.media_player.setPosition(max(video_position - self.video_seek_durcation, 0))

    def keyPressEvent(self, event):
        if event.key() == Qt.Key_Space:
            if self.media_player.state() == QMediaPlayer.PlayingState:
                self.media_player.pause()
                self.video_need_replay = False
            else:
                self.media_player.play()
                self.video_need_replay = True
        elif event.key() == Qt.Key_H:
            self.seek_backward()
        elif event.key() == Qt.Key_L:
            self.seek_forward()

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import setVerticalScrollBarPolicy [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 setVerticalScrollBarPolicy [as 别名]
class NS_Animate(object):
    def __init__(self, scene, x_max, y_max, back_color):

        scene = QGraphicsScene(0, 0, x_max, y_max)
        scene.setBackgroundBrush(back_color)

        color = [Qt.green, Qt.lightGray, Qt.darkYellow, QtGui.QColor.fromRgb(255, 85, 0)]
        self.anim_butt = [ QGraphicsRectWidget(color[j]) for j in range(4) ]
        for j in range(4):
            scene.addItem(self.anim_butt[j])

        self.window = QGraphicsView(scene)
        self.window.setFrameStyle(0)
        self.window.setAlignment(Qt.AlignLeft | Qt.AlignTop)
        self.window.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.window.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        self.machine = QStateMachine()

        self.group = QState()
        self.timer = QTimer()
        self.timer.setInterval(1250)
        self.timer.setSingleShot(True)
        self.group.entered.connect(self.timer.start)

        # set states positions
        anim_state_rects = [ [QRect(x_max*xp/6, y_max*yp/4, 8, 8) for xp in range(4)] for yp in range(4) ]
        self.states = [ self.createGeometryState(
                                self.anim_butt[0], anim_state_rects[0][j], self.anim_butt[1], anim_state_rects[1][j],
                                self.anim_butt[2], anim_state_rects[2][j], self.anim_butt[3], anim_state_rects[3][j],
                                self.group
                            ) for j in range(4) ]

        self.group.setInitialState(self.states[0])


        self.animationGroup = QParallelAnimationGroup()
        self.anim = QPropertyAnimation(self.anim_butt[3], 'geometry')
        self.anim.setDuration(1250)
        self.anim.setEasingCurve(QEasingCurve.InBack)
        self.animationGroup.addAnimation(self.anim)

        self.subGroup = QSequentialAnimationGroup(self.animationGroup)
        self.subGroup.addPause(100)
        self.anim = QPropertyAnimation(self.anim_butt[2], 'geometry')
        self.anim.setDuration(1000)
        self.anim.setEasingCurve(QEasingCurve.OutElastic)
        self.subGroup.addAnimation(self.anim)

        self.subGroup = QSequentialAnimationGroup(self.animationGroup)
        self.subGroup.addPause(500)
        self.anim = QPropertyAnimation(self.anim_butt[1], 'geometry')
        self.anim.setDuration(500)
        self.anim.setEasingCurve(QEasingCurve.OutElastic)
        self.subGroup.addAnimation(self.anim)

        self.subGroup = QSequentialAnimationGroup(self.animationGroup)
        self.subGroup.addPause(750)
        self.anim = QPropertyAnimation(self.anim_butt[0], 'geometry')
        self.anim.setDuration(250)
        self.anim.setEasingCurve(QEasingCurve.OutElastic)
        self.subGroup.addAnimation(self.anim)

        self.stateSwitcher = StateSwitcher(self.machine)
        self.group.addTransition(self.timer.timeout, self.stateSwitcher)
        for j in range(4):
            self.stateSwitcher.addState(self.states[j], self.animationGroup)

        self.machine.addState(self.group)
        self.machine.setInitialState(self.group)
        self.machine.start()

    #
    def createGeometryState(self, w1, rect1, w2, rect2, w3, rect3, w4, rect4, parent):
        result = QState(parent)

        result.assignProperty(w1, 'geometry', rect1)
        result.assignProperty(w1, 'geometry', rect1)
        result.assignProperty(w2, 'geometry', rect2)
        result.assignProperty(w3, 'geometry', rect3)
        result.assignProperty(w4, 'geometry', rect4)

        return result

# 需要导入模块: from PyQt5.QtWidgets import QGraphicsView [as 别名]
# 或者: from PyQt5.QtWidgets.QGraphicsView import setVerticalScrollBarPolicy [as 别名]
    button2.setZValue(1)
    button3.setZValue(2)
    button4.setZValue(3)

    scene = QGraphicsScene(0, 0, 300, 300)
    scene.setBackgroundBrush(Qt.black)
    scene.addItem(button1)
    scene.addItem(button2)
    scene.addItem(button3)
    scene.addItem(button4)

    window = QGraphicsView(scene)
    window.setFrameStyle(0)
    window.setAlignment(Qt.AlignLeft | Qt.AlignTop)
    window.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
    window.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

    machine = QStateMachine()

    group = QState()
    timer = QTimer()
    timer.setInterval(1250)
    timer.setSingleShot(True)
    group.entered.connect(timer.start)

    state1 = createGeometryState(button1, QRect(100, 0, 50, 50), button2,
            QRect(150, 0, 50, 50), button3, QRect(200, 0, 50, 50), button4,
            QRect(250, 0, 50, 50), group)

    state2 = createGeometryState(button1, QRect(250, 100, 50, 50), button2,
            QRect(250, 150, 50, 50), button3, QRect(250, 200, 50, 50), button4,