Example #1
0
    def renderTo(self, plot, dest):
        """
        Render a plot to a file

        Supported formats are:

          - pdf: Portable Document Format PDF
          - ps: Postcript
          - svg: Scalable Vector Graphics SVG
          - all image formats supported by Qt, see QImageWriter.supportedImageFormats()

        Scalable vector graphic formats like PDF or SVG are superior to
        raster graphics formats.

        :param qwt.plot.QwtPlot plot: Plot widget
        :param dest: QPaintDevice, QPrinter or QSvgGenerator instance

        .. seealso::

            :py:meth:`render()`,
            :py:meth:`qwt.painter.QwtPainter.setRoundingAlignment()`
        """
        if isinstance(dest, QPaintDevice):
            w = dest.width()
            h = dest.height()
            rect = QRectF(0, 0, w, h)
        elif isinstance(dest, QPrinter):
            w = dest.width()
            h = dest.height()
            rect = QRectF(0, 0, w, h)
            aspect = rect.width() / rect.height()
            if aspect < 1.0:
                rect.setHeight(aspect * rect.width())
        elif isinstance(dest, QSvgGenerator):
            rect = dest.viewBoxF()
            if rect.isEmpty():
                rect.setRect(0, 0, dest.width(), dest.height())
            if rect.isEmpty():
                rect.setRect(0, 0, 800, 600)
        else:
            raise TypeError("Unsupported destination type %s" % type(dest))
        p = QPainter(dest)
        self.render(plot, p, rect)
Example #2
0
def qwtDrawSvgSymbols(painter, points, numPoints, renderer, symbol):
    if renderer is None or not renderer.isValid():
        return
    viewBox = QRectF(renderer.viewBoxF())
    if viewBox.isEmpty():
        return
    sz = QSizeF(symbol.size())
    if not sz.isValid():
        sz = viewBox.size()
    sx = sz.width() / viewBox.width()
    sy = sz.height() / viewBox.height()
    pinPoint = QPointF(viewBox.center())
    if symbol.isPinPointEnabled():
        pinPoint = symbol.pinPoint()
    dx = sx * (pinPoint.x() - viewBox.left())
    dy = sy * (pinPoint.y() - viewBox.top())
    for pos in points:
        x = pos.x() - dx
        y = pos.y() - dy
        renderer.render(painter, QRectF(x, y, sz.width(), sz.height()))
Example #3
0
def qwtDrawGraphicSymbols(painter, points, numPoint, graphic, symbol):
    pointRect = QRectF(graphic.controlPointRect())
    if pointRect.isEmpty():
        return
    sx = 1.0
    sy = 1.0
    sz = symbol.size()
    if sz.isValid():
        sx = sz.width() / pointRect.width()
        sy = sz.height() / pointRect.height()
    pinPoint = QPointF(pointRect.center())
    if symbol.isPinPointEnabled():
        pinPoint = symbol.pinPoint()
    transform = QTransform(painter.transform())
    for pos in points:
        tr = QTransform(transform)
        tr.translate(pos.x(), pos.y())
        tr.scale(sx, sy)
        tr.translate(-pinPoint.x(), -pinPoint.y())
        painter.setTransform(tr)
        graphic.render(painter)
    painter.setTransform(transform)
Example #4
0
    def boundingRect(self):
        """
        Calculate the bounding rectangle for a symbol at position (0,0).

        :return: Bounding rectangle
        """
        rect = QRectF()
        pinPointTranslation = False
        if self.__data.style in (QwtSymbol.Ellipse, QwtSymbol.Rect,
                                 QwtSymbol.Hexagon):
            pw = 0.0
            if self.__data.pen.style() != Qt.NoPen:
                pw = max([self.__data.pen.widthF(), 1.0])
            rect.setSize(self.__data.size + QSizeF(pw, pw))
            rect.moveCenter(QPointF(0.0, 0.0))
        elif self.__data.style in (
                QwtSymbol.XCross,
                QwtSymbol.Diamond,
                QwtSymbol.Triangle,
                QwtSymbol.UTriangle,
                QwtSymbol.DTriangle,
                QwtSymbol.RTriangle,
                QwtSymbol.LTriangle,
                QwtSymbol.Star1,
                QwtSymbol.Star2,
        ):
            pw = 0.0
            if self.__data.pen.style() != Qt.NoPen:
                pw = max([self.__data.pen.widthF(), 1.0])
            rect.setSize(QSizeF(self.__data.size) + QSizeF(2 * pw, 2 * pw))
            rect.moveCenter(QPointF(0.0, 0.0))
        elif self.__data.style == QwtSymbol.Path:
            if self.__data.path.graphic.isNull():
                self.__data.path.graphic = qwtPathGraphic(
                    self.__data.path.path, self.__data.pen, self.__data.brush)
            rect = qwtScaleBoundingRect(self.__data.path.graphic,
                                        self.__data.size)
            pinPointTranslation = True
        elif self.__data.style == QwtSymbol.Pixmap:
            if self.__data.size.isEmpty():
                rect.setSize(self.__data.pixmap.pixmap.size())
            else:
                rect.setSize(self.__data.size)
            pinPointTranslation = True
        elif self.__data.style == QwtSymbol.Graphic:
            rect = qwtScaleBoundingRect(self.__data.graphic.graphic,
                                        self.__data.size)
            pinPointTranslation = True
        elif self.__data.style == QwtSymbol.SvgDocument:
            if self.__data.svg.renderer is not None:
                rect = self.__data.svg.renderer.viewBoxF()
            if self.__data.size.isValid() and not rect.isEmpty():
                sz = QSizeF(rect.size())
                sx = self.__data.size.width() / sz.width()
                sy = self.__data.size.height() / sz.height()
                transform = QTransform()
                transform.scale(sx, sy)
                rect = transform.mapRect(rect)
            pinPointTranslation = True
        else:
            rect.setSize(self.__data.size)
            rect.moveCenter(QPointF(0.0, 0.0))
        if pinPointTranslation:
            pinPoint = QPointF(0.0, 0.0)
            if self.__data.isPinPointEnabled:
                pinPoint = rect.center() - self.__data.pinPoint
            rect.moveCenter(pinPoint)
        r = QRect()
        r.setLeft(np.floor(rect.left()))
        r.setTop(np.floor(rect.top()))
        r.setRight(np.floor(rect.right()))
        r.setBottom(np.floor(rect.bottom()))
        if self.__data.style != QwtSymbol.Pixmap:
            r.adjust(-1, -1, 1, 1)
        return r