Python Qt.QPropertyAnimation類代碼示例

    def __init__(self, gui):
        QWidget.__init__(self, gui)
        self.setObjectName('jobs_pointer')
        self.setVisible(False)
        self.resize(100, 80)
        self.animation = QPropertyAnimation(self, "geometry", self)
        self.animation.setDuration(750)
        self.animation.setLoopCount(2)
        self.animation.setEasingCurve(QEasingCurve.Linear)
        self.animation.finished.connect(self.hide)

        taily, heady = 0, 55
        self.arrow_path = QPainterPath(QPointF(40, taily))
        self.arrow_path.lineTo(40, heady)
        self.arrow_path.lineTo(20, heady)
        self.arrow_path.lineTo(50, self.height())
        self.arrow_path.lineTo(80, heady)
        self.arrow_path.lineTo(60, heady)
        self.arrow_path.lineTo(60, taily)
        self.arrow_path.closeSubpath()

        c = self.palette().color(QPalette.Active, QPalette.WindowText)
        self.color = QColor(c)
        self.color.setAlpha(100)
        self.brush = QBrush(self.color, Qt.SolidPattern)

 def __init__(self, *args):
     QToolButton.__init__(self, *args)
     self.animation = QPropertyAnimation(self, 'iconSize', self)
     self.animation.setDuration(60/72.*1000)
     self.animation.setLoopCount(4)
     self.normal_icon_size = QSize(64, 64)
     self.animation.valueChanged.connect(self.value_changed)
     self.setCursor(Qt.PointingHandCursor)
     self.animation.finished.connect(self.animation_finished)

 def __init__(self, parent):
     super(CoverDelegate, self).__init__(parent)
     self._animated_size = 1.0
     self.animation = QPropertyAnimation(self, 'animated_size', self)
     self.animation.setEasingCurve(QEasingCurve.OutInCirc)
     self.animation.setDuration(500)
     self.set_dimensions()
     self.cover_cache = CoverCache(limit=gprefs['cover_grid_cache_size'])
     self.render_queue = Queue()
     self.animating = None
     self.highlight_color = QColor(Qt.white)

 def __init__(self, parent):
     super(CoverDelegate, self).__init__(parent)
     self._animated_size = 1.0
     self.animation = QPropertyAnimation(self, 'animated_size', self)
     self.animation.setEasingCurve(QEasingCurve.OutInCirc)
     self.animation.setDuration(500)
     self.set_dimensions()
     self.cover_cache = CoverCache(limit=gprefs['cover_grid_cache_size'])
     self.render_queue = Queue()
     self.animating = None
     self.highlight_color = QColor(Qt.white)
     self.on_device_emblem = QPixmap(I('ok.png')).scaled(48, 48, transformMode=Qt.SmoothTransformation)

    def __init__(self, vertical, parent=None):
        QWidget.__init__(self, parent)
        self._current_pixmap_size = QSize(120, 120)
        self.vertical = vertical

        self.animation = QPropertyAnimation(self, "current_pixmap_size", self)
        self.animation.setEasingCurve(QEasingCurve(QEasingCurve.OutExpo))
        self.animation.setDuration(1000)
        self.animation.setStartValue(QSize(0, 0))
        self.animation.valueChanged.connect(self.value_changed)

        self.setSizePolicy(QSizePolicy.Expanding if vertical else QSizePolicy.Minimum, QSizePolicy.Expanding)

        self.default_pixmap = QPixmap(I("book.png"))
        self.pixmap = self.default_pixmap
        self.pwidth = self.pheight = None
        self.data = {}

        self.do_layout()

    def __init__(self, vertical, parent=None):
        QWidget.__init__(self, parent)
        self._current_pixmap_size = QSize(120, 120)
        self.vertical = vertical

        self.animation = QPropertyAnimation(self, b'current_pixmap_size', self)
        self.animation.setEasingCurve(QEasingCurve(QEasingCurve.OutExpo))
        self.animation.setDuration(1000)
        self.animation.setStartValue(QSize(0, 0))
        # self.animation.valueChanged.connect(self.value_changed)

        self.setSizePolicy(
            QSizePolicy.Expanding if vertical else QSizePolicy.Minimum,
            QSizePolicy.Expanding
        )

        # self.default_pixmap = QPixmap(os.getcwd() + "/src/gui/code Examples/book.icns")
        self.default_pixmap = QPixmap(":/back.png")
        self.pixmap = self.default_pixmap
        self.pwidth = self.pheight = None
        self.data = {}

        self.do_layout()

class CoverView(QWidget):  # {{{

    cover_changed = pyqtSignal(object, object)
    cover_removed = pyqtSignal(object)

    def __init__(self, vertical, parent=None):
        QWidget.__init__(self, parent)
        self._current_pixmap_size = QSize(120, 120)
        self.vertical = vertical

        self.animation = QPropertyAnimation(self, 'current_pixmap_size', self)
        self.animation.setEasingCurve(QEasingCurve(QEasingCurve.OutExpo))
        self.animation.setDuration(1000)
        self.animation.setStartValue(QSize(0, 0))
        self.animation.valueChanged.connect(self.value_changed)

        self.setSizePolicy(
                QSizePolicy.Expanding if vertical else QSizePolicy.Minimum,
                QSizePolicy.Expanding)

        self.default_pixmap = QPixmap(I('book.png'))
        self.pixmap = self.default_pixmap
        self.pwidth = self.pheight = None
        self.data = {}

        self.do_layout()

    def value_changed(self, val):
        self.update()

    def setCurrentPixmapSize(self, val):
        self._current_pixmap_size = val

    def do_layout(self):
        if self.rect().width() == 0 or self.rect().height() == 0:
            return
        pixmap = self.pixmap
        pwidth, pheight = pixmap.width(), pixmap.height()
        try:
            self.pwidth, self.pheight = fit_image(pwidth, pheight,
                            self.rect().width(), self.rect().height())[1:]
        except:
            self.pwidth, self.pheight = self.rect().width()-1, \
                    self.rect().height()-1
        self.current_pixmap_size = QSize(self.pwidth, self.pheight)
        self.animation.setEndValue(self.current_pixmap_size)

    def show_data(self, data):
        self.animation.stop()
        same_item = getattr(data, 'id', True) == self.data.get('id', False)
        self.data = {'id':data.get('id', None)}
        if data.cover_data[1]:
            self.pixmap = QPixmap.fromImage(data.cover_data[1])
            if self.pixmap.isNull() or self.pixmap.width() < 5 or \
                    self.pixmap.height() < 5:
                self.pixmap = self.default_pixmap
        else:
            self.pixmap = self.default_pixmap
        self.do_layout()
        self.update()
        if (not same_item and not config['disable_animations'] and
                self.isVisible()):
            self.animation.start()

    def paintEvent(self, event):
        canvas_size = self.rect()
        width = self.current_pixmap_size.width()
        extrax = canvas_size.width() - width
        if extrax < 0:
            extrax = 0
        x = int(extrax/2.)
        height = self.current_pixmap_size.height()
        extray = canvas_size.height() - height
        if extray < 0:
            extray = 0
        y = int(extray/2.)
        target = QRect(x, y, width, height)
        p = QPainter(self)
        p.setRenderHints(QPainter.Antialiasing | QPainter.SmoothPixmapTransform)
        p.drawPixmap(target, self.pixmap.scaled(target.size(),
            Qt.KeepAspectRatio, Qt.SmoothTransformation))
        if gprefs['bd_overlay_cover_size']:
            sztgt = target.adjusted(0, 0, 0, -4)
            f = p.font()
            f.setBold(True)
            p.setFont(f)
            sz = u'\u00a0%d x %d\u00a0'%(self.pixmap.width(), self.pixmap.height())
            flags = Qt.AlignBottom|Qt.AlignRight|Qt.TextSingleLine
            szrect = p.boundingRect(sztgt, flags, sz)
            p.fillRect(szrect.adjusted(0, 0, 0, 4), QColor(0, 0, 0, 200))
            p.setPen(QPen(QColor(255,255,255)))
            p.drawText(sztgt, flags, sz)
        p.end()

    current_pixmap_size = pyqtProperty('QSize',
            fget=lambda self: self._current_pixmap_size,
            fset=setCurrentPixmapSize
            )

    def contextMenuEvent(self, ev):
#.........這裏部分代碼省略.........

class CoverDelegate(QStyledItemDelegate):

    MARGIN = 4

    @pyqtProperty(float)
    def animated_size(self):
        return self._animated_size

    @animated_size.setter
    def animated_size(self, val):
        self._animated_size = val

    def __init__(self, parent):
        super(CoverDelegate, self).__init__(parent)
        self._animated_size = 1.0
        self.animation = QPropertyAnimation(self, 'animated_size', self)
        self.animation.setEasingCurve(QEasingCurve.OutInCirc)
        self.animation.setDuration(500)
        self.set_dimensions()
        self.cover_cache = CoverCache(limit=gprefs['cover_grid_cache_size'])
        self.render_queue = Queue()
        self.animating = None
        self.highlight_color = QColor(Qt.white)

    def set_dimensions(self):
        width = self.original_width = gprefs['cover_grid_width']
        height = self.original_height = gprefs['cover_grid_height']
        self.original_show_title = show_title = gprefs['cover_grid_show_title']

        if height < 0.1:
            height = auto_height(self.parent())
        else:
            height *= self.parent().logicalDpiY() * CM_TO_INCH

        if width < 0.1:
            width = 0.75 * height
        else:
            width *= self.parent().logicalDpiX() * CM_TO_INCH
        self.cover_size = QSize(width, height)
        self.title_height = 0
        if show_title:
            f = self.parent().font()
            sz = f.pixelSize()
            if sz < 5:
                sz = f.pointSize() * self.parent().logicalDpiY() / 72.0
            self.title_height = max(25, sz + 10)
        self.item_size = self.cover_size + QSize(2 * self.MARGIN, (2 * self.MARGIN) + self.title_height)
        self.calculate_spacing()
        self.animation.setStartValue(1.0)
        self.animation.setKeyValueAt(0.5, 0.5)
        self.animation.setEndValue(1.0)

    def calculate_spacing(self):
        spc = self.original_spacing = gprefs['cover_grid_spacing']
        if spc < 0.01:
            self.spacing = max(10, min(50, int(0.1 * self.original_width)))
        else:
            self.spacing = self.parent().logicalDpiX() * CM_TO_INCH * spc

    def sizeHint(self, option, index):
        return self.item_size

    def paint(self, painter, option, index):
        QStyledItemDelegate.paint(self, painter, option, QModelIndex())  # draw the hover and selection highlights
        m = index.model()
        db = m.db
        try:
            book_id = db.id(index.row())
        except (ValueError, IndexError, KeyError):
            return
        if book_id in m.ids_to_highlight_set:
            painter.save()
            try:
                painter.setPen(self.highlight_color)
                painter.setRenderHint(QPainter.Antialiasing, True)
                painter.drawRoundedRect(option.rect, 10, 10, Qt.RelativeSize)
            finally:
                painter.restore()
        marked = db.data.get_marked(book_id)
        db = db.new_api
        cdata = self.cover_cache[book_id]
        device_connected = self.parent().gui.device_connected is not None
        on_device = device_connected and db.field_for('ondevice', book_id)
        painter.save()
        right_adjust = 0
        try:
            rect = option.rect
            rect.adjust(self.MARGIN, self.MARGIN, -self.MARGIN, -self.MARGIN)
            orect = QRect(rect)
            if cdata is None or cdata is False:
                title = db.field_for('title', book_id, default_value='')
                authors = ' & '.join(db.field_for('authors', book_id, default_value=()))
                painter.setRenderHint(QPainter.TextAntialiasing, True)
                painter.drawText(rect, Qt.AlignCenter|Qt.TextWordWrap, '%s\n\n%s' % (title, authors))
                if cdata is False:
                    self.render_queue.put(book_id)
            else:
                if self.title_height != 0:
                    trect = QRect(rect)
                    rect.setBottom(rect.bottom() - self.title_height)
#.........這裏部分代碼省略.........

class ThrobbingButton(QToolButton):

    def __init__(self, *args):
        QToolButton.__init__(self, *args)
        self.animation = QPropertyAnimation(self, 'iconSize', self)
        self.animation.setDuration(60/72.*1000)
        self.animation.setLoopCount(4)
        self.normal_icon_size = QSize(64, 64)
        self.animation.valueChanged.connect(self.value_changed)
        self.setCursor(Qt.PointingHandCursor)
        self.animation.finished.connect(self.animation_finished)

    def set_normal_icon_size(self, w, h):
        self.normal_icon_size = QSize(w, h)
        self.setIconSize(self.normal_icon_size)
        try:
            self.setMinimumSize(self.sizeHint())
        except:
            self.setMinimumSize(QSize(w+5, h+5))

    def animation_finished(self):
        self.setIconSize(self.normal_icon_size)

    def enterEvent(self, ev):
        self.start_animation()

    def leaveEvent(self, ev):
        self.stop_animation()

    def value_changed(self, val):
        self.update()

    def start_animation(self):
        if config['disable_animations']:
            return
        if self.animation.state() != self.animation.Stopped or not self.isVisible():
            return
        size = self.normal_icon_size.width()
        smaller = int(0.7 * size)
        self.animation.setStartValue(QSize(smaller, smaller))
        self.animation.setEndValue(self.normal_icon_size)
        QMetaObject.invokeMethod(self.animation, 'start', Qt.QueuedConnection)

    def stop_animation(self):
        self.animation.stop()
        self.animation_finished()

class CoverView(QWidget):
    u"""
    TODO: 實現點擊圖書顯示封麵的效果(再加一個coverflow的效果就完美了), 看來現在暫時搞不定了
    """
    cover_changed = pyqtSignal(object, object)
    cover_removed = pyqtSignal(object)
    open_cover_width = pyqtSignal(object, object)

    def __init__(self, vertical, parent=None):
        QWidget.__init__(self, parent)
        self._current_pixmap_size = QSize(120, 120)
        self.vertical = vertical

        self.animation = QPropertyAnimation(self, b'current_pixmap_size', self)
        self.animation.setEasingCurve(QEasingCurve(QEasingCurve.OutExpo))
        self.animation.setDuration(1000)
        self.animation.setStartValue(QSize(0, 0))
        # self.animation.valueChanged.connect(self.value_changed)

        self.setSizePolicy(
            QSizePolicy.Expanding if vertical else QSizePolicy.Minimum,
            QSizePolicy.Expanding
        )

        # self.default_pixmap = QPixmap(os.getcwd() + "/src/gui/code Examples/book.icns")
        self.default_pixmap = QPixmap(":/back.png")
        self.pixmap = self.default_pixmap
        self.pwidth = self.pheight = None
        self.data = {}

        self.do_layout()

    def value_changed(self, val):
        self.update()

    def setCurrentPixmapSize(self, val):
        self._current_pixmap_size = val

    def do_layout(self):
        if self.rect().width() == 0 or self.rect().height() == 0:
            return
        pixmap = self.pixmap
        pwidth, pheight = pixmap.width(), pixmap.height()
        try:
            self.pwidth, self.pheight = fit_image(pwidth, pheight,
                                                  self.rect().width, self.rect().height())[1:]
        except:
            self.pwidth, self.pheight = self.rect().width()-1, self.rect().height()-1
        self.current_pixmap_size = QSize(self.pwidth, self.pheight)
        self.animation.setEndValue(self.current_pixmap_size)

    def show_data(self, current_book):
        # self.animation.stop()
        # TODO
        if False:
            pass
        else:
            self.pixmap = self.default_pixmap
        # self.do_layout()
        # self.updatte()
        # self.animation.start()

    current_pixmap_size = pyqtProperty('QSize', fget=lambda self: self._current_pixmap_size,
                                       fset=setCurrentPixmapSize)

    def value_changed(self, val):
        # self.update()
        pass

class CoverDelegate(QStyledItemDelegate):

    MARGIN = 4

    @pyqtProperty(float)
    def animated_size(self):
        return self._animated_size

    @animated_size.setter
    def animated_size(self, val):
        self._animated_size = val

    def __init__(self, parent):
        super(CoverDelegate, self).__init__(parent)
        self._animated_size = 1.0
        self.animation = QPropertyAnimation(self, 'animated_size', self)
        self.animation.setEasingCurve(QEasingCurve.OutInCirc)
        self.animation.setDuration(500)
        self.set_dimensions()
        self.cover_cache = CoverCache(limit=gprefs['cover_grid_cache_size'])
        self.render_queue = Queue()
        self.animating = None
        self.highlight_color = QColor(Qt.white)

    def set_dimensions(self):
        width = self.original_width = gprefs['cover_grid_width']
        height = self.original_height = gprefs['cover_grid_height']
        self.original_show_title = show_title = gprefs['cover_grid_show_title']

        if height < 0.1:
            height = max(185, QApplication.instance().desktop().availableGeometry(self.parent()).height() / 5.0)
        else:
            height *= self.parent().logicalDpiY() * CM_TO_INCH

        if width < 0.1:
            width = 0.75 * height
        else:
            width *= self.parent().logicalDpiX() * CM_TO_INCH
        self.cover_size = QSize(width, height)
        self.title_height = 0
        if show_title:
            f = self.parent().font()
            sz = f.pixelSize()
            if sz < 5:
                sz = f.pointSize() * self.parent().logicalDpiY() / 72.0
            self.title_height = max(25, sz + 10)
        self.item_size = self.cover_size + QSize(2 * self.MARGIN, (2 * self.MARGIN) + self.title_height)
        self.calculate_spacing()
        self.animation.setStartValue(1.0)
        self.animation.setKeyValueAt(0.5, 0.5)
        self.animation.setEndValue(1.0)

    def calculate_spacing(self):
        spc = self.original_spacing = gprefs['cover_grid_spacing']
        if spc < 0.1:
            self.spacing = max(10, min(50, int(0.1 * self.original_width)))
        else:
            self.spacing = self.parent().logicalDpiX() * CM_TO_INCH * spc

    def sizeHint(self, option, index):
        return self.item_size

    def paint(self, painter, option, index):
        QStyledItemDelegate.paint(self, painter, option, QModelIndex())  # draw the hover and selection highlights
        m = index.model()
        db = m.db
        try:
            book_id = db.id(index.row())
        except (ValueError, IndexError, KeyError):
            return
        if book_id in m.ids_to_highlight_set:
            painter.save()
            try:
                painter.setPen(self.highlight_color)
                painter.setRenderHint(QPainter.Antialiasing, True)
                painter.drawRoundedRect(option.rect, 10, 10, Qt.RelativeSize)
            finally:
                painter.restore()
        db = db.new_api
        cdata = self.cover_cache[book_id]
        painter.save()
        try:
            rect = option.rect
            rect.adjust(self.MARGIN, self.MARGIN, -self.MARGIN, -self.MARGIN)
            if cdata is None or cdata is False:
                title = db.field_for('title', book_id, default_value='')
                authors = ' & '.join(db.field_for('authors', book_id, default_value=()))
                painter.setRenderHint(QPainter.TextAntialiasing, True)
                painter.drawText(rect, Qt.AlignCenter|Qt.TextWordWrap, '%s\n\n%s' % (title, authors))
                if cdata is False:
                    self.render_queue.put(book_id)
            else:
                if self.title_height != 0:
                    orect = QRect(rect)
                    rect.setBottom(rect.bottom() - self.title_height)
                if self.animating is not None and self.animating.row() == index.row():
                    cdata = cdata.scaled(cdata.size() * self._animated_size)
                dx = max(0, int((rect.width() - cdata.width())/2.0))
                dy = max(0, rect.height() - cdata.height())
                rect.adjust(dx, dy, -dx, 0)
#.........這裏部分代碼省略.........

class Pointer(QWidget):

    def __init__(self, gui):
        QWidget.__init__(self, gui)
        self.setObjectName('jobs_pointer')
        self.setVisible(False)
        self.resize(100, 80)
        self.animation = QPropertyAnimation(self, "geometry", self)
        self.animation.setDuration(750)
        self.animation.setLoopCount(2)
        self.animation.setEasingCurve(QEasingCurve.Linear)
        self.animation.finished.connect(self.hide)

        taily, heady = 0, 55
        self.arrow_path = QPainterPath(QPointF(40, taily))
        self.arrow_path.lineTo(40, heady)
        self.arrow_path.lineTo(20, heady)
        self.arrow_path.lineTo(50, self.height())
        self.arrow_path.lineTo(80, heady)
        self.arrow_path.lineTo(60, heady)
        self.arrow_path.lineTo(60, taily)
        self.arrow_path.closeSubpath()

        c = self.palette().color(QPalette.Active, QPalette.WindowText)
        self.color = QColor(c)
        self.color.setAlpha(100)
        self.brush = QBrush(self.color, Qt.SolidPattern)

        # from PyQt4.Qt import QTimer
        # QTimer.singleShot(1000, self.start)

    @property
    def gui(self):
        return self.parent()

    def point_at(self, frac):
        return (self.path.pointAtPercent(frac).toPoint() -
                QPoint(self.rect().center().x(), self.height()))

    def rect_at(self, frac):
        return QRect(self.point_at(frac), self.size())

    def abspos(self, widget):
        pos = widget.pos()
        parent = widget.parent()
        while parent is not self.gui:
            pos += parent.pos()
            parent = parent.parent()
        return pos

    def start(self):
        if config['disable_animations']:
            return
        self.setVisible(True)
        self.raise_()
        end = self.abspos(self.gui.jobs_button)
        end = QPointF( end.x() + self.gui.jobs_button.width()/3.0, end.y()+20)
        start = QPointF(end.x(), end.y() - 0.5*self.height())
        self.path = QPainterPath(QPointF(start))
        self.path.lineTo(end)
        self.path.closeSubpath()
        self.animation.setStartValue(self.rect_at(0.0))
        self.animation.setEndValue(self.rect_at(1.0))
        self.animation.setDirection(self.animation.Backward)
        num_keys = 100
        for i in xrange(1, num_keys):
            i /= num_keys
            self.animation.setKeyValueAt(i, self.rect_at(i))
        self.animation.start()

    def paintEvent(self, ev):
        p = QPainter(self)
        p.setRenderHints(p.Antialiasing)
        p.setBrush(self.brush)
        p.setPen(Qt.NoPen)
        p.drawPath(self.arrow_path)
        p.end()