Python QGraphicsView.verticalScrollBar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 verticalScrollBar [as 别名]
class CarlaPatchbayW(QFrame, PluginEditParentMeta, HostWidgetMeta):
#class CarlaPatchbayW(QFrame, PluginEditParentMeta, HostWidgetMeta, metaclass=PyQtMetaClass):
    def __init__(self, parent, host, doSetup = True, onlyPatchbay = True, is3D = False):
        QFrame.__init__(self, parent)
        self.host = host

        if False:
            # kdevelop likes this :)
            host = CarlaHostMeta()
            self.host = host

        # -------------------------------------------------------------

        self.fLayout = QGridLayout(self)
        self.fLayout.setContentsMargins(0, 0, 0, 0)
        self.fLayout.setSpacing(1)
        self.setLayout(self.fLayout)

        self.fView = QGraphicsView(self)
        self.fKeys = PixmapKeyboardHArea(self)

        self.fPeaksIn  = DigitalPeakMeter(self)
        self.fPeaksOut = DigitalPeakMeter(self)
        self.fPeaksCleared = True

        self.fPeaksIn.setColor(DigitalPeakMeter.BLUE)
        self.fPeaksIn.setChannels(2)
        self.fPeaksIn.setOrientation(DigitalPeakMeter.VERTICAL)
        self.fPeaksIn.setFixedWidth(25)

        self.fPeaksOut.setColor(DigitalPeakMeter.GREEN)
        self.fPeaksOut.setChannels(2)
        self.fPeaksOut.setOrientation(DigitalPeakMeter.VERTICAL)
        self.fPeaksOut.setFixedWidth(25)

        self.fLayout.addWidget(self.fPeaksIn, 0, 0)
        self.fLayout.addWidget(self.fView, 0, 1) # self.fViewWidget if is3D else
        self.fLayout.addWidget(self.fPeaksOut, 0, 2)
        self.fLayout.addWidget(self.fKeys, 1, 0, 1, 0)

        # -------------------------------------------------------------
        # Internal stuff

        self.fParent      = parent
        self.fPluginCount = 0
        self.fPluginList  = []

        self.fExternalPatchbay = False
        self.fIsOnlyPatchbay   = onlyPatchbay
        self.fSelectedPlugins  = []

        self.fCanvasWidth  = 0
        self.fCanvasHeight = 0

        # -------------------------------------------------------------
        # Set-up Canvas Preview

        self.fMiniCanvasPreview = self.fParent.ui.miniCanvasPreview
        self.fMiniCanvasPreview.setRealParent(self)
        self.fMovingViaMiniCanvas = False

        # -------------------------------------------------------------
        # Set-up Canvas

        self.scene = patchcanvas.PatchScene(self, self.fView)
        self.fView.setScene(self.scene)
        self.fView.setRenderHint(QPainter.Antialiasing, bool(parent.fSavedSettings[CARLA_KEY_CANVAS_ANTIALIASING] == patchcanvas.ANTIALIASING_FULL))

        if parent.fSavedSettings[CARLA_KEY_CANVAS_USE_OPENGL] and hasGL: # and not is3D:
            self.fViewWidget = QGLWidget(self)
            self.fView.setViewport(self.fViewWidget)
            self.fView.setRenderHint(QPainter.HighQualityAntialiasing, parent.fSavedSettings[CARLA_KEY_CANVAS_HQ_ANTIALIASING])

        self.setupCanvas()

        QTimer.singleShot(100, self.slot_restoreScrollbarValues)

        # -------------------------------------------------------------
        # Connect actions to functions

        parent.ui.act_settings_show_meters.toggled.connect(self.slot_showCanvasMeters)
        parent.ui.act_settings_show_keyboard.toggled.connect(self.slot_showCanvasKeyboard)

        self.fView.horizontalScrollBar().valueChanged.connect(self.slot_horizontalScrollBarChanged)
        self.fView.verticalScrollBar().valueChanged.connect(self.slot_verticalScrollBarChanged)

        self.scene.scaleChanged.connect(self.slot_canvasScaleChanged)
        self.scene.sceneGroupMoved.connect(self.slot_canvasItemMoved)
        self.scene.pluginSelected.connect(self.slot_canvasPluginSelected)

        self.fMiniCanvasPreview.miniCanvasMoved.connect(self.slot_miniCanvasMoved)

        self.fKeys.keyboard.noteOn.connect(self.slot_noteOn)
        self.fKeys.keyboard.noteOff.connect(self.slot_noteOff)

        # -------------------------------------------------------------
        # Load Settings

        settings = QSettings()

#.........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 verticalScrollBar [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()