Python QLinearGradient.setStart方法代码示例

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
 def drawForeground( self, painter, rect ):
     """
     Draws the foreground for this scene.
     
     :param      painter | <QPainter>
                 rect    | <QRect>
     """
     gantt  = self.ganttWidget()
     header = gantt.treeWidget().header()
     width  = self.sceneRect().width()
     height = header.height()
     
     # create the main color
     palette     = gantt.palette()
     color       = palette.color(palette.Button)
     textColor   = palette.color(palette.ButtonText)
     borderColor = color.darker(140)
     text_align  = Qt.AlignBottom | Qt.AlignHCenter
     y           = rect.top()
     
     # create the gradient
     gradient = QLinearGradient()
     gradient.setStart(0, y)
     gradient.setFinalStop(0, y + height)
     gradient.setColorAt(0, color)
     gradient.setColorAt(1, color.darker(120))
     
     painter.setBrush(QBrush(gradient))
     painter.drawRect(0, y, width, height)
     
     # add top labels
     for rect, label in self._topLabels:
         rx = rect.x()
         ry = rect.y() + y
         rw = rect.width()
         rh = rect.height()
         
         painter.setPen(borderColor)
         painter.drawRect(rx, ry, rw, rh)
         
         painter.setPen(textColor)
         painter.drawText(rx, ry, rw, rh - 2, text_align, label)
     
     # add bottom labels
     for rect, label in self._labels:
         rx = rect.x()
         ry = rect.y() + y
         rw = rect.width()
         rh = rect.height()
         
         painter.setPen(borderColor)
         painter.drawRect(rx, ry, rw, rh)
         
         painter.setPen(textColor)
         painter.drawText(rx, ry, rw, rh - 2, text_align, label)

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
def _gen_striped_gradient(basecolor):
    """Just generate a standard gradient, for use as a background"""
    g = QLinearGradient()
    g.setSpread(g.ReflectSpread)
    g.setStart(0,0)
    g.setFinalStop(2, 2)
    g.setColorAt(0.0, QColor(basecolor))
    g.setColorAt(0.35, QColor(0,0,0,0))
    g.setColorAt(0.75, QColor(0,0,0,0))
    g.setColorAt(1.0, QColor(basecolor))
    return g

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
 def paint(self, painter, option, widget):
     widget = self.scene()._slider
     pixmap = self.pixmap()
     
     palette = widget.palette()
     base = palette.color(palette.Base)
     
     # draw the reflection
     painter.save()
     painter.setPen(Qt.NoPen)
     
     transform = painter.transform()
     transform.translate(pixmap.width() / 2.0, 0)
     transform.rotate(self.angle(), Qt.YAxis)
     transform.translate(-pixmap.width() / 2.0, 0)
     painter.setTransform(transform)
     
     self.graphicsEffect().setEnabled(self.isSelected())
     
     painter.drawPixmap(0, 0, pixmap)
     
     painter.setBrush(Qt.NoBrush)
     painter.setOpacity(0.2)
     painter.scale(1, -1)
     painter.translate(0, -(pixmap.height()) * 2)
     painter.drawPixmap(0, 0, pixmap)
     
     painter.setOpacity(1)
     
     grad = QLinearGradient()
     grad.setStart(0, 0)
     grad.setFinalStop(0, pixmap.height())
     grad.setColorAt(1.0, QColor(0, 0, 0, 0))
     grad.setColorAt(0.2, base)
     grad.setColorAt(0.0, base)
     
     painter.setBrush(grad)
     painter.drawRect(0, 0, pixmap.width(), pixmap.height())
     
     painter.restore()

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
 def drawItem(self, item, painter, option):
     """
     Draws the inputed item as a bar graph.
     
     :param      item    | <XChartDatasetItem>
                 painter | <QPainter>
                 option  | <QStyleOptionGraphicsItem>
     """
     dataset = item.dataset()
     
     painter.save()
     painter.setRenderHint(painter.Antialiasing)
     
     pen = QPen(dataset.color())
     pen.setWidth(0.75)
     painter.setPen(pen)
     
     for path in item.buildData('subpaths', []):
         gradient = QLinearGradient()
         
         clr = QColor(dataset.color())
         clr.setAlpha(220)
         
         gradient.setColorAt(0.0,  clr.lighter(180))
         gradient.setColorAt(0.1,  clr.lighter(160))
         gradient.setColorAt(0.25, clr.lighter(140))
         gradient.setColorAt(1.0,  clr.lighter(125))
         
         if self.orientation() == Qt.Vertical:
             gradient.setStart(0, path.boundingRect().bottom())
             gradient.setFinalStop(0, path.boundingRect().top())
         else:
             gradient.setStart(path.boundingRect().left(), 0)
             gradient.setFinalStop(path.boundingRect().right(), 0)
         
         painter.setBrush(gradient)
         painter.drawPath(path)
     
     painter.restore()

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
 def drawForeground(self, painter, rect):
     palette = self._slider.palette()
     color = palette.color(palette.Base)
     
     trans = self._slider.viewportTransform()
     rect = trans.mapRect(self._slider.rect())
     width = rect.width()
     rect.setX(abs(rect.x()))
     rect.setWidth(width)
     
     clear = QColor(0, 0, 0, 0)
     
     grad = QLinearGradient()
     grad.setStart(rect.left(), 0)
     grad.setFinalStop(rect.right(), 0)
     grad.setColorAt(0.0, color)
     grad.setColorAt(0.3, clear)
     grad.setColorAt(0.7, clear)
     grad.setColorAt(1.0, color)
     
     painter.setBrush(grad)
     painter.setPen(Qt.NoPen)
     
     painter.drawRect(rect)

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
class OWLegendGradient(QGraphicsObject):

    gradient_width = 20

    def __init__(self, palette, values, parent):
        QGraphicsObject.__init__(self, parent)
        self.parent = parent
        self.palette = palette
        self.values = values
        self.legend = parent
        self.label_items = [QGraphicsTextItem(text, self) for text in values]
        for i in self.label_items:
            i.setTextWidth(50)

        self.rect = QRectF()

        self.gradient_item = QGraphicsRectItem(self)
        self.gradient = QLinearGradient()
        self.gradient.setStops([(v*0.1, self.palette[v*0.1]) for v in range(11) ])
        self.orientation = Qt.Horizontal
        self.set_orientation(Qt.Vertical)

    def set_orientation(self, orientation):
        if self.orientation == orientation:
            return

        self.orientation = orientation

        if self.orientation == Qt.Vertical:
            height = max([item.boundingRect().height() for item in self.label_items])
            total_height = height * max(5, len(self.label_items))
            interval = (total_height - self.label_items[-1].boundingRect().height()) / (len(self.label_items) -1)
            self.gradient_item.setRect(10, 0, self.gradient_width, total_height)
            self.gradient.setStart(10, 0)
            self.gradient.setFinalStop(10, total_height)
            self.gradient_item.setBrush(QBrush(self.gradient))
            self.gradient_item.setPen(QPen(Qt.NoPen))
            y = 0
            x = 30
            for item in self.label_items:
                move_item_xy(item, x, y, self.parent.graph.animate_plot)
                y += interval
            self.rect = QRectF(10, 0, self.gradient_width + max([item.boundingRect().width() for item in self.label_items]), self.label_items[0].boundingRect().height() * max(5, len(self.label_items)))
        else:
            width = 50
            height = max([item.boundingRect().height() for item in self.label_items])
            total_width = width * max(5, len(self.label_items))
            interval = (total_width - self.label_items[-1].boundingRect().width()) / (len(self.label_items) -1)

            self.gradient_item.setRect(0, 0, total_width, self.gradient_width)
            self.gradient.setStart(0, 0)
            self.gradient.setFinalStop(total_width, 0)
            self.gradient_item.setBrush(QBrush(self.gradient))
            self.gradient_item.setPen(QPen(Qt.NoPen))
            x = 0
            y = 30
            for item in self.label_items:
                move_item_xy(item, x, y, self.parent.graph.animate_plot)
                x += interval
            self.rect = QRectF(0, 0, total_width, self.gradient_width + height)

    def boundingRect(self):
        return getattr(self, 'rect', QRectF())

    def paint(self, painter, option, widget):
        pass

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
class PixmapDial(QDial):
    # enum CustomPaint
    CUSTOM_PAINT_NULL      = 0
    CUSTOM_PAINT_CARLA_WET = 1
    CUSTOM_PAINT_CARLA_VOL = 2
    CUSTOM_PAINT_CARLA_L   = 3
    CUSTOM_PAINT_CARLA_R   = 4

    # enum Orientation
    HORIZONTAL = 0
    VERTICAL   = 1

    HOVER_MIN = 0
    HOVER_MAX = 9

    def __init__(self, parent):
        QDial.__init__(self, parent)

        self.fPixmap      = QPixmap("./bitmaps/dial_01d.png")
        self.fPixmapNum   = "01"
        self.fCustomPaint = self.CUSTOM_PAINT_NULL

        self.fHovered   = False
        self.fHoverStep = self.HOVER_MIN

        if self.fPixmap.width() > self.fPixmap.height():
            self.fOrientation = self.HORIZONTAL
        else:
            self.fOrientation = self.VERTICAL

        self.fLabel     = ""
        self.fLabelPos  = QPointF(0.0, 0.0)
        self.fLabelFont = QFont()
        self.fLabelFont.setPointSize(6)
        self.fLabelWidth  = 0
        self.fLabelHeight = 0
        self.fLabelGradient = QLinearGradient(0, 0, 0, 1)

        if self.palette().window().color().lightness() > 100:
            # Light background
            c = self.palette().dark().color()
            self.fColor1 = c
            self.fColor2 = QColor(c.red(), c.green(), c.blue(), 0)
            self.fColorT = [self.palette().buttonText().color(), self.palette().mid().color()]
        else:
            # Dark background
            self.fColor1 = QColor(0, 0, 0, 255)
            self.fColor2 = QColor(0, 0, 0, 0)
            self.fColorT = [Qt.white, Qt.darkGray]

        self.updateSizes()

    def getSize(self):
        return self.fSize

    def setCustomPaint(self, paint):
        self.fCustomPaint = paint
        self.fLabelPos.setY(self.fSize + self.fLabelHeight/2)
        self.update()

    def setEnabled(self, enabled):
        if self.isEnabled() != enabled:
            self.fPixmap.load("./bitmaps/dial_%s%s.png" % (self.fPixmapNum, "" if enabled else "d"))
            self.updateSizes()
            self.update()
        QDial.setEnabled(self, enabled)

    def setLabel(self, label):
        self.fLabel = label

        self.fLabelWidth  = QFontMetrics(self.fLabelFont).width(label)
        self.fLabelHeight = QFontMetrics(self.fLabelFont).height()

        self.fLabelPos.setX(float(self.fSize)/2.0 - float(self.fLabelWidth)/2.0)
        self.fLabelPos.setY(self.fSize + self.fLabelHeight)

        self.fLabelGradient.setColorAt(0.0, self.fColor1)
        self.fLabelGradient.setColorAt(0.6, self.fColor1)
        self.fLabelGradient.setColorAt(1.0, self.fColor2)

        self.fLabelGradient.setStart(0, float(self.fSize)/2.0)
        self.fLabelGradient.setFinalStop(0, self.fSize + self.fLabelHeight + 5)

        self.fLabelGradientRect = QRectF(float(self.fSize)/8.0, float(self.fSize)/2.0, float(self.fSize*6)/8.0, self.fSize+self.fLabelHeight+5)
        self.update()

    def setPixmap(self, pixmapId):
        self.fPixmapNum = "%02i" % pixmapId
        self.fPixmap.load("./bitmaps/dial_%s%s.png" % (self.fPixmapNum, "" if self.isEnabled() else "d"))

        if self.fPixmap.width() > self.fPixmap.height():
            self.fOrientation = self.HORIZONTAL
        else:
            self.fOrientation = self.VERTICAL

        self.updateSizes()
        self.update()

    def minimumSizeHint(self):
        return QSize(self.fSize, self.fSize)
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
    def draw(self, painter, size = None):
        """
        :Arguments:
            painter : QPainter
                Opened painter on which to draw
        """
        bounding_rect = QRectF()
        position = self.position
        transfer_function = self.transfer_function
        font = QFont(self.font)
        text_color = self.text_color
        line_color = self.line_color
        line_thickness = self.line_thickness
        value_range = self.value_range
        if size is None:
            viewport = painter.viewport() # viewport rectangle
            mat, ok = painter.worldMatrix().inverted()
            if not ok:
                raise ValueError("Transformation matrix of painter is singular.")
            viewport = mat.mapRect(viewport)
        else:
            viewport = size
# First, prepare the gradient
        w = viewport.width()
        h = viewport.height()
        #print("Size of viewport: {0}x{1}".format(w, h))
        gr = QLinearGradient()
        nb_values = ceil(w/5.0)
        brush_color = QColor()
        for i in range(int(nb_values)):
            brush_color.setRgbF(*transfer_function.rgba(i/nb_values))
            gr.setColorAt(i/nb_values, brush_color)
# Second, find its position
        metric = QFontMetricsF(font, painter.device())
        font_test = [ str(i)*5 for i in range(10) ]
        lim_width = 0
        lim_height = 0
        for t in font_test:
            rect = metric.boundingRect(t)
            lim_width  = max(lim_width,  rect.width())
            lim_height = max(lim_height, rect.height())
        lim_height *= 3
        length = self.scale_length
        shift_length = (1-length)/2
        width = self.scale_width
        shift_width = self.scale_shift_width
        delta_value = value_range[1]-value_range[0]
        if position == "Top":
            scale_rect = QRectF(shift_length*w, shift_width*h, length*w, width*h)
            limit_rect(scale_rect, viewport, lim_width, lim_height)
            gr.setStart(scale_rect.left(), scale_rect.center().y())
            gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
            start_pos = scale_rect.bottomLeft()
            end_pos = scale_rect.bottomRight()
        elif position == "Right":
            scale_rect = QRectF((1-shift_width-width)*w, shift_length*h, width*w, length*h)
            limit_rect(scale_rect, viewport, lim_width, lim_height)
            gr.setStart(scale_rect.center().x(), scale_rect.bottom())
            gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
            start_pos = scale_rect.bottomLeft()
            end_pos = scale_rect.topLeft()
        elif position == "Bottom":
            scale_rect = QRectF(shift_length*w, (1-shift_width-width)*h, length*w, width*h)
            limit_rect(scale_rect, viewport, lim_width, lim_height)
            gr.setStart(scale_rect.left(), scale_rect.center().y())
            gr.setFinalStop(scale_rect.right(), scale_rect.center().y())
            start_pos = scale_rect.topLeft()
            end_pos = scale_rect.topRight()
        elif position == "Left":
            scale_rect = QRectF(shift_width*w, shift_length*h, width*w, length*h)
            limit_rect(scale_rect, viewport, lim_width, lim_height)
            gr.setStart(scale_rect.center().x(), scale_rect.bottom())
            gr.setFinalStop(scale_rect.center().x(), scale_rect.top())
            start_pos = scale_rect.bottomRight()
            end_pos = scale_rect.topRight()
        else:
            raise ValueError("Invalid scale position: %s" % position)
        shift_pos = (end_pos-start_pos)/delta_value
        if position in ["Left", "Right"]:
            is_vertical = True
            length = scale_rect.height()
        else:
            is_vertical = False
            length = scale_rect.width()
# Get the ticks
        ticks = self.selectValues(length, is_vertical, painter)
        if len(ticks) == 0:
            return
        ticks_str, ticks_extra = self._tick2str(ticks)
# Figure the shifts
        dist_to_bar = self.text_to_bar
        max_width = 0
        max_height = 0
        for t in ticks_str:
            rect = metric.boundingRect(t)
            max_width = max(rect.width(), max_width)
            max_height = max(rect.height(), max_height)
        if position == "Left":
            shift_left = dist_to_bar
            shift_top = None
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
class GradientLegendItem(QGraphicsObject, GraphicsWidgetAnchor):
    gradient_width = 20

    def __init__(self, title, palette, values, parent):
        QGraphicsObject.__init__(self, parent)
        GraphicsWidgetAnchor.__init__(self)
        self.parent = self.legend = parent
        self.palette = palette
        self.values = values

        self.title = QGraphicsTextItem('%s:' % title, self)
        f = self.title.font()
        f.setBold(True)
        self.title.setFont(f)
        self.title_item = QGraphicsRectItem(self.title.boundingRect(), self)
        self.title_item.setPen(QPen(Qt.NoPen))
        self.title_item.stackBefore(self.title)

        self.label_items = [QGraphicsTextItem(text, self) for text in values]
        for i in self.label_items:
            i.setTextWidth(50)

        self.rect = QRectF()

        self.gradient_item = QGraphicsRectItem(self)
        self.gradient = QLinearGradient()
        self.gradient.setStops([(v * 0.1, self.palette[v * 0.1])
                                for v in range(11)])
        self.orientation = Qt.Horizontal
        self.set_orientation(Qt.Vertical)

        self.setFlag(QGraphicsItem.ItemIgnoresTransformations, True)
        self.setFlag(QGraphicsItem.ItemIsMovable, True)

    def set_orientation(self, orientation):
        return
        if self.orientation == orientation:
            return

        self.orientation = orientation

        if self.orientation == Qt.Vertical:
            height = max(item.boundingRect().height()
                         for item in self.label_items)
            total_height = height * max(5, len(self.label_items))
            interval = (total_height -
                        self.label_items[-1].boundingRect().height()
                        ) / (len(self.label_items) - 1)
            self.gradient_item.setRect(10, 0, self.gradient_width, total_height)
            self.gradient.setStart(10, 0)
            self.gradient.setFinalStop(10, total_height)
            self.gradient_item.setBrush(QBrush(self.gradient))
            self.gradient_item.setPen(QPen(Qt.NoPen))
            y = -20   # hja, no; dela --> pri boundingRect() zato pristejem +20
            x = 0
            move_item_xy(self.title, x, y, False)
            y = 10
            x = 30
            for item in self.label_items:
                move_item_xy(item, x, y, False)
                                       # self.parent.graph.animate_plot)
                y += interval
            self.rect = QRectF(10, 0,
                               self.gradient_width +
                               max(item.boundingRect().width()
                                   for item in self.label_items),
                               self.label_items[0].boundingRect().height() *
                               max(5, len(self.label_items)))
        else:
            # za horizontalno orientacijo nisem dodajal title-a
            width = 50
            height = max(item.boundingRect().height()
                         for item in self.label_items)
            total_width = width * max(5, len(self.label_items))
            interval = (total_width -
                        self.label_items[-1].boundingRect().width()
                        ) / (len(self.label_items) - 1)

            self.gradient_item.setRect(0, 0, total_width, self.gradient_width)
            self.gradient.setStart(0, 0)
            self.gradient.setFinalStop(total_width, 0)
            self.gradient_item.setBrush(QBrush(self.gradient))
            self.gradient_item.setPen(QPen(Qt.NoPen))
            x = 0
            y = 30
            for item in self.label_items:
                move_item_xy(item, x, y, False)
                                       # self.parent.graph.animate_plot)
                x += interval
            self.rect = QRectF(0, 0, total_width, self.gradient_width + height)

    # noinspection PyPep8Naming
    def boundingRect(self):
        width = max(self.rect.width(), self.title_item.boundingRect().width())
        height = self.rect.height() + self.title_item.boundingRect().height()
        return QRectF(self.rect.left(), self.rect.top(), width, height)

    def paint(self, painter, option, widget):
        pass

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
class PixmapDial(QDial):
    HORIZONTAL = 0
    VERTICAL   = 1

    CUSTOM_PAINT_CARLA_WET = 1
    CUSTOM_PAINT_CARLA_VOL = 2
    CUSTOM_PAINT_CARLA_L   = 3
    CUSTOM_PAINT_CARLA_R   = 4

    HOVER_MIN = 0
    HOVER_MAX = 9

    def __init__(self, parent):
        QDial.__init__(self, parent)

        self.m_pixmap = QPixmap(":/bitmaps/dial_01d.png")
        self.m_pixmap_n_str = "01"
        self.m_custom_paint = 0

        self.m_hovered    = False
        self.m_hover_step = self.HOVER_MIN

        if self.m_pixmap.width() > self.m_pixmap.height():
            self.m_orientation = self.HORIZONTAL
        else:
            self.m_orientation = self.VERTICAL

        self.m_label = ""
        self.m_label_pos = QPointF(0.0, 0.0)
        self.m_label_width = 0
        self.m_label_height = 0
        self.m_label_gradient = QLinearGradient(0, 0, 0, 1)

        if self.palette().window().color().lightness() > 100:
            # Light background
            self.m_color1 = QColor(100, 100, 100, 255)
            self.m_color2 = QColor(0, 0, 0, 0)
            self.m_colorT = [self.palette().text().color(), self.palette().mid().color()]
        else:
            # Dark background
            self.m_color1 = QColor(0, 0, 0, 255)
            self.m_color2 = QColor(0, 0, 0, 0)
            self.m_colorT = [Qt.white, Qt.darkGray]

        self.updateSizes()

    def getSize(self):
        return self.p_size

    def setCustomPaint(self, paint):
        self.m_custom_paint = paint
        self.update()

    def setEnabled(self, enabled):
        if self.isEnabled() != enabled:
            self.m_pixmap.load(":/bitmaps/dial_%s%s.png" % (self.m_pixmap_n_str, "" if enabled else "d"))
            self.updateSizes()
            self.update()
        QDial.setEnabled(self, enabled)

    def setLabel(self, label):
        self.m_label = label

        self.m_label_width  = QFontMetrics(self.font()).width(label)
        self.m_label_height = QFontMetrics(self.font()).height()

        self.m_label_pos.setX((self.p_size / 2) - (self.m_label_width / 2))
        self.m_label_pos.setY(self.p_size + self.m_label_height)

        self.m_label_gradient.setColorAt(0.0, self.m_color1)
        self.m_label_gradient.setColorAt(0.6, self.m_color1)
        self.m_label_gradient.setColorAt(1.0, self.m_color2)

        self.m_label_gradient.setStart(0, self.p_size / 2)
        self.m_label_gradient.setFinalStop(0, self.p_size + self.m_label_height + 5)

        self.m_label_gradient_rect = QRectF(self.p_size * 1 / 8, self.p_size / 2, self.p_size * 6 / 8, self.p_size + self.m_label_height + 5)
        self.update()

    def setPixmap(self, pixmap_id):
        if pixmap_id > 10:
            self.m_pixmap_n_str = str(pixmap_id)
        else:
            self.m_pixmap_n_str = "0%i" % pixmap_id

        self.m_pixmap.load(":/bitmaps/dial_%s%s.png" % (self.m_pixmap_n_str, "" if self.isEnabled() else "d"))

        if self.m_pixmap.width() > self.m_pixmap.height():
            self.m_orientation = self.HORIZONTAL
        else:
            self.m_orientation = self.VERTICAL

        self.updateSizes()
        self.update()

    def minimumSizeHint(self):
        return QSize(self.p_size, self.p_size)

    def sizeHint(self):
        return QSize(self.p_size, self.p_size)
#.........这里部分代码省略.........

# 需要导入模块: from PyQt4.QtGui import QLinearGradient [as 别名]
# 或者: from PyQt4.QtGui.QLinearGradient import setStart [as 别名]
 def paintEvent(self, event):
     """
     Paints the background for the dock toolbar.
     
     :param      event | <QPaintEvent>
     """
     x = 1
     y = 1
     w = self.width()
     h = self.height()
     
     clr_a = QColor(220, 220, 220)
     clr_b = QColor(190, 190, 190)
     
     grad = QLinearGradient()
     grad.setColorAt(0.0, clr_a)
     grad.setColorAt(0.6, clr_a)
     grad.setColorAt(1.0, clr_b)
     
     # adjust the coloring for the horizontal toolbar
     if self.position() & (self.Position.North | self.Position.South):
         h = self.minimumPixmapSize().height() + 6
         
         if self.position() == self.Position.South:
             y = self.height() - h
             grad.setStart(0, y)
             grad.setFinalStop(0, self.height())
         else:
             grad.setStart(0, 0)
             grad.setFinalStart(0, h)
     
     # adjust the coloring for the vertical toolbar
     if self.position() & (self.Position.East | self.Position.West):
         w = self.minimumPixmapSize().width() + 6
         
         if self.position() == self.Position.West:
             x = self.width() - w
             grad.setStart(x, 0)
             grad.setFinalStop(self.width(), 0)
         else:
             grad.setStart(0, 0)
             grad.setFinalStop(w, 0)
     
     painter = QPainter(self)
     painter.fillRect(x, y, w, h, grad)
     
     # show the active action
     action = self.selectedAction()
     if action is not None and \
        not self.currentAction() and \
        not self._animating:
         for lbl in self.actionLabels():
             if lbl.action() != action:
                 continue
             
             geom = lbl.geometry()
             size = lbl.pixmapSize()
             
             if self.position() == self.Position.North:
                 x = geom.left()
                 y = 0
                 w = geom.width()
                 h = size.height() + geom.top() + 2
             
             elif self.position() == self.Position.East:
                 x = 0
                 y = geom.top()
                 w = size.width() + geom.left() + 2
                 h = geom.height()
             
             painter.setPen(QColor(140, 140, 40))
             painter.setBrush(QColor(160, 160, 160))
             painter.drawRect(x, y, w, h)
             break