Python QtGui.QPixmap类代码示例

    def __init__(self, widget, parent=None, name=None):
        OWPlot.__init__(self, parent, name, axes=[], widget=widget)
        ScaleData.__init__(self)

        self.update_antialiasing(False)

        self.widget = widget
        self.last_selected_curve = None
        self.enableGridXB(0)
        self.enableGridYL(0)
        self.domain_contingencies = None
        self.auto_update_axes = 1
        self.old_legend_keys = []
        self.selection_conditions = {}
        self.attributes = []
        self.visualized_mid_labels = []
        self.attribute_indices = []
        self.valid_data = []
        self.groups = {}
        self.colors = None

        self.selected_examples = []
        self.unselected_examples = []
        self.bottom_pixmap = QPixmap(gui.resource_filename("icons/upgreenarrow.png"))
        self.top_pixmap = QPixmap(gui.resource_filename("icons/downgreenarrow.png"))

def decorate_welcome_icon(icon, background_color):
    """Return a `QIcon` with a circle shaped background.
    """
    welcome_icon = QIcon()
    sizes = [32, 48, 64, 80, 128, 256]
    background_color = NAMED_COLORS.get(background_color, background_color)
    background_color = QColor(background_color)
    grad = radial_gradient(background_color)
    for size in sizes:
        icon_size = QSize(5 * size / 8, 5 * size / 8)
        icon_rect = QRect(QPoint(0, 0), icon_size)
        pixmap = QPixmap(size, size)
        pixmap.fill(Qt.transparent)
        p = QPainter(pixmap)
        p.setRenderHint(QPainter.Antialiasing, True)
        p.setBrush(QBrush(grad))
        p.setPen(Qt.NoPen)
        ellipse_rect = QRect(0, 0, size, size)
        p.drawEllipse(ellipse_rect)
        icon_rect.moveCenter(ellipse_rect.center())
        icon.paint(p, icon_rect, Qt.AlignCenter, )
        p.end()

        welcome_icon.addPixmap(pixmap)

    return welcome_icon

    def __updatePixmap(self):
        """
        Update the cached shadow pixmap.
        """
        rect_size = QSize(50, 50)
        left = top = right = bottom = self.radius_

        # Size of the pixmap.
        pixmap_size = QSize(rect_size.width() + left + right,
                            rect_size.height() + top + bottom)
        shadow_rect = QRect(QPoint(left, top), rect_size)
        pixmap = QPixmap(pixmap_size)
        pixmap.fill(QColor(0, 0, 0, 0))
        rect_fill_color = self.palette().color(QPalette.Window)

        pixmap = render_drop_shadow_frame(
                      pixmap,
                      QRectF(shadow_rect),
                      shadow_color=self.color_,
                      offset=QPointF(0, 0),
                      radius=self.radius_,
                      rect_fill_color=rect_fill_color
                      )

        self.__shadowPixmap = pixmap
        self.update()

    def pixmap(self, size, mode, state):
        # type: (QSize, QIcon.Mode, QIcon.State) -> QPixmap
        if not self.__generator.isValid():
            return QPixmap()

        dsize = self.__generator.defaultSize()  # type: QSize
        if not dsize.isNull():
            dsize.scale(size, Qt.KeepAspectRatio)
            size = dsize
        key = "{}.SVGIconEngine/{}/{}x{}".format(
            __name__, self.__cache_id, size.width(), size.height()
        )
        pm = QPixmapCache.find(key)
        if pm is None or pm.isNull():
            pm = QPixmap(size)
            pm.fill(Qt.transparent)
            painter = QPainter(pm)
            try:
                self.__generator.render(
                    painter, QRectF(0, 0, size.width(), size.height()))
            finally:
                painter.end()
            QPixmapCache.insert(key, pm)
        style = QApplication.style()
        if style is not None:
            opt = QStyleOption()
            opt.palette = QApplication.palette()
            pm = style.generatedIconPixmap(mode, pm, opt)
        return pm

class GraphicsPixmapWidget(QGraphicsWidget):
    """
    A QGraphicsWidget displaying a QPixmap
    """
    def __init__(self, pixmap=None, parent=None):
        super().__init__(parent)
        self.setCacheMode(QGraphicsItem.ItemCoordinateCache)
        self._pixmap = QPixmap(pixmap) if pixmap is not None else QPixmap()
        self._keepAspect = True
        self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)

    def setPixmap(self, pixmap):
        self._pixmap = QPixmap(pixmap)
        self.updateGeometry()
        self.update()

    def pixmap(self):
        return QPixmap(self._pixmap)

    def setKeepAspectRatio(self, keep):
        if self._keepAspect != keep:
            self._keepAspect = bool(keep)
            self.update()

    def keepAspectRatio(self):
        return self._keepAspect

    def setGeometry(self, rect):
        self.prepareGeometryChange()
        super().setGeometry(rect)

    def sizeHint(self, which, constraint=QSizeF()):
        if which == Qt.PreferredSize:
            return QSizeF(self._pixmap.size())
        else:
            return QGraphicsWidget.sizeHint(self, which, constraint)

    def paint(self, painter, option, widget=0):
        if self._pixmap.isNull():
            return

        rect = self.contentsRect()
        pixsize = QSizeF(self._pixmap.size())
        aspectmode = (Qt.KeepAspectRatio if self._keepAspect
                      else Qt.IgnoreAspectRatio)
        pixsize.scale(rect.size(), aspectmode)
        pixrect = QRectF(QPointF(0, 0), pixsize)
        pixrect.moveCenter(rect.center())

        painter.save()
        painter.setPen(QPen(QColor(0, 0, 0, 50), 3))
        painter.drawRoundedRect(pixrect, 2, 2)
        painter.setRenderHint(QPainter.SmoothPixmapTransform)
        source = QRectF(QPointF(0, 0), QSizeF(self._pixmap.size()))
        painter.drawPixmap(pixrect, self._pixmap, source)
        painter.restore()

    def __init__(self, parent=None):
        super().__init__(parent, Qt.CustomizeWindowHint | Qt.FramelessWindowHint | Qt.Window |
                         Qt.WindowStaysOnTopHint | Qt.X11BypassWindowManagerHint)
        self.setAttribute(Qt.WA_DeleteOnClose)
        self.installEventFilter(self)
        self.setMouseTracking(True)
        self._band = QRubberBand(QRubberBand.Rectangle, self)

        self._resize_origin = None
        self._drag_mask = 0
        self._origin = None
        self.selected_image = None

        # Window background
        desktop = QApplication.desktop()
        if is_qt5():
            g = desktop.geometry()
            self._snapshot = QPixmap(g.width(), g.height())
            painter = QPainter(self._snapshot)
            for screen in QApplication.screens():
                g = screen.geometry()
                painter.drawPixmap(g, screen.grabWindow(0, g.x(), g.y(), g.width(), g.height()))
            painter.end()
        else:
            self._snapshot = QPixmap.grabWindow(desktop.winId(), 0, 0, desktop.width(), desktop.height())

        self.setGeometry(desktop.geometry())
        self._darken = self._snapshot.copy()
        painter = QPainter(self._darken)
        brush = QBrush(QColor(0, 0, 0, 128))
        painter.setBrush(brush)
        painter.drawRect(self._darken.rect())
        painter.end()

        # Buttons
        self._buttons = QWidget(self)
        self._button_layout = QHBoxLayout(self._buttons)
        self._button_layout.setSpacing(0)
        self._button_layout.setContentsMargins(0, 0, 0, 0)
        self._button_layout.setContentsMargins(0, 0, 0, 0)
        self.save_as = QPushButton(self.tr('Save As'))
        self.save_as.pressed.connect(self.save_image_as)
        self.save_as.setCursor(Qt.ArrowCursor)
        self._button_layout.addWidget(self.save_as)
        self.copy = QPushButton(self.tr('Copy'))
        self.copy.pressed.connect(self.copy_to_clipboard)
        self.copy.setCursor(Qt.ArrowCursor)
        self._button_layout.addWidget(self.copy)
        self.share = QPushButton(self.tr('Share'))
        self.share.pressed.connect(self.share_selection)
        self.share.setCursor(Qt.ArrowCursor)
        self._button_layout.addWidget(self.share)
        self._buttons.hide()

def palette_pixmap(colors, size):
    img = QPixmap(size)
    img.fill(Qt.transparent)

    painter = QPainter(img)
    grad = palette_gradient(colors)
    grad.setCoordinateMode(QLinearGradient.ObjectBoundingMode)
    painter.setPen(Qt.NoPen)
    painter.setBrush(QBrush(grad))
    painter.drawRect(0, 0, size.width(), size.height())
    painter.end()
    return img

def createExContPalettePixmap(width, height, color1, color2, passThroughColors):
    p = QPainter()
    img = QPixmap(width, height)
    p.begin(img)

    #p.eraseRect(0, 0, w, h)
    p.setPen(QPen(Qt.NoPen))
    g = QLinearGradient(0, 0, width, height)
    g.setColorAt(0, color1)
    g.setColorAt(1, color2)
    for i, color in enumerate(passThroughColors):
        g.setColorAt(float(i + 1) / (len(passThroughColors) + 1), color)
    p.fillRect(img.rect(), QBrush(g))
    return img

def createContPalettePixmap(width, height, color1, color2, passThroughBlack):
    p = QPainter()
    img = QPixmap(width, height)
    p.begin(img)

    #p.eraseRect(0, 0, w, h)
    p.setPen(QPen(Qt.NoPen))
    g = QLinearGradient(0, 0, width, height)
    g.setColorAt(0, color1)
    g.setColorAt(1, color2)
    if passThroughBlack:
        g.setColorAt(0.5, Qt.black)
    p.fillRect(img.rect(), QBrush(g))
    return img

 def update_legend(self, colors, labels):
     layout = self.legend.layout()
     while self.legend_items:
         w = self.legend_items.pop()
         layout.removeWidget(w)
         w.deleteLater()
     for row, (color, label) in enumerate(zip(colors, labels)):
         icon = QLabel()
         p = QPixmap(12, 12)
         p.fill(color)
         icon.setPixmap(p)
         label = QLabel(label)
         layout.addWidget(icon, row, 0)
         layout.addWidget(label, row, 1, alignment=Qt.AlignLeft)
         self.legend_items += (icon, label)

def crosshairs(color, radius=24, circle=False):
    radius = max(radius, 16)
    pixmap = QPixmap(radius, radius)
    pixmap.fill(Qt.transparent)
    painter = QPainter()
    painter.begin(pixmap)
    painter.setRenderHints(QPainter.Antialiasing)
    pen = QPen(QBrush(color), 1)
    pen.setWidthF(1.5)
    painter.setPen(pen)
    if circle:
        painter.drawEllipse(2, 2, radius - 2, radius - 2)
    painter.drawLine(radius / 2, 7, radius / 2, radius / 2 - 7)
    painter.drawLine(7, radius / 2, radius / 2 - 7, radius / 2)
    painter.end()
    return pixmap

        def init_combos():
            """
            function initialize the combos with attributes
            """
            reset_combos()

            c_vars = [var for var in data.domain.variables if var.is_continuous]

            self.x_var_model[:] = c_vars
            self.y_var_model[:] = c_vars

            for i, var in enumerate(data.domain.class_var.values):
                pix_map = QPixmap(60, 60)
                color = tuple(data.domain.class_var.colors[i].tolist())
                pix_map.fill(QColor(*color))
                self.target_class_combobox.addItem(QIcon(pix_map), var)

 def __init__(self, *args, **kwargs):
     super().__init__(*args, **kwargs)
     self.__pixmap = QPixmap()
     # Flag indicating if the widget was resized as a result of user
     # initiated window resize. When false the widget will automatically
     # resize/re-position based on pixmap size.
     self.__hasExplicitSize = False
     self.__inUpdateWindowGeometry = False

 def __init__(self, pixmap=None, parent=None):
     super().__init__(parent)
     self.setCacheMode(QGraphicsItem.ItemCoordinateCache)
     self._pixmap = QPixmap(pixmap) if pixmap is not None else QPixmap()
     self._keepAspect = True
     self._crop = False
     self._subset = True
     self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)

    def splash_screen():
        # type: () -> Tuple[QPixmap, QRect]
        """
        Return a splash screen pixmap and an text area within it.

        The text area is used for displaying text messages during application
        startup.

        The default implementation returns a bland rectangle splash screen.

        Returns
        -------
        t : Tuple[QPixmap, QRect]
            A QPixmap and a rect area within it.
        """
        path = pkg_resources.resource_filename(
            __name__, "icons/orange-canvas-core-splash.svg")
        pm = QPixmap(path)

        version = QCoreApplication.applicationVersion()
        if version:
            version_parsed = LooseVersion(version)
            version_comp = version_parsed.version
            version = ".".join(map(str, version_comp[:2]))
        size = 21 if len(version) < 5 else 16
        font = QFont()
        font.setPixelSize(size)
        font.setBold(True)
        font.setItalic(True)
        font.setLetterSpacing(QFont.AbsoluteSpacing, 2)
        metrics = QFontMetrics(font)
        br = metrics.boundingRect(version).adjusted(-5, 0, 5, 0)
        br.moveBottomRight(QPoint(pm.width() - 15, pm.height() - 15))

        p = QPainter(pm)
        p.setRenderHint(QPainter.Antialiasing)
        p.setRenderHint(QPainter.TextAntialiasing)
        p.setFont(font)
        p.setPen(QColor("#231F20"))
        p.drawText(br, Qt.AlignCenter, version)
        p.end()
        textarea = QRect(15, 15, 170, 20)
        return pm, textarea