/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** * Qwt Widget Library * Copyright (C) 1997 Josef Wilgen * Copyright (C) 2002 Uwe Rathmann * * This library is free software; you can redistribute it and/or * modify it under the terms of the Qwt License, Version 1.0 *****************************************************************************/ #include #include #include "qwt_painter.h" #include "qwt_polygon.h" #include "qwt_symbol.h" /*! Default Constructor The symbol is constructed with gray interior, black outline with zero width, no size and style 'NoSymbol'. */ QwtSymbol::QwtSymbol(): d_brush(Qt::gray), d_pen(Qt::black), d_size(0,0), d_style(QwtSymbol::NoSymbol) { } /*! \brief Constructor \param style Symbol Style \param brush brush to fill the interior \param pen outline pen \param size size */ QwtSymbol::QwtSymbol(QwtSymbol::Style style, const QBrush &brush, const QPen &pen, const QSize &size): d_brush(brush), d_pen(pen), d_size(size), d_style(style) { } //! Destructor QwtSymbol::~QwtSymbol() { } QwtSymbol *QwtSymbol::clone() const { QwtSymbol *other = new QwtSymbol; *other = *this; return other; } /*! \brief Specify the symbol's size If the 'h' parameter is left out or less than 0, and the 'w' parameter is greater than or equal to 0, the symbol size will be set to (w,w). \param w width \param h height (defaults to -1) */ void QwtSymbol::setSize(int w, int h) { if ((w >= 0) && (h < 0)) h = w; d_size = QSize(w,h); } //! Set the symbol's size void QwtSymbol::setSize(const QSize &s) { if (s.isValid()) d_size = s; } /*! \brief Assign a brush The brush is used to draw the interior of the symbol. \param br brush */ void QwtSymbol::setBrush(const QBrush &br) { d_brush = br; } /*! \brief Assign a pen The pen is used to draw the symbol's outline. \param pn pen */ void QwtSymbol::setPen(const QPen &pn) { d_pen = pn; } /*! \brief Draw the symbol at a point (x,y). */ void QwtSymbol::draw(QPainter *painter, int x, int y) const { draw(painter, QPoint(x, y)); } /*! \brief Draw the symbol into a bounding rectangle. This function assumes that the painter has been initialized with brush and pen before. This allows a much more performant implementation when painting many symbols with the same brush and pen like in curves. \param painter Painter \param r Bounding rectangle */ void QwtSymbol::draw(QPainter *painter, const QRect& r) const { switch(d_style) { case QwtSymbol::Ellipse: QwtPainter::drawEllipse(painter, r); break; case QwtSymbol::Rect: QwtPainter::drawRect(painter, r); break; case QwtSymbol::Diamond: { const int w2 = r.width() / 2; const int h2 = r.height() / 2; QwtPolygon pa(4); pa.setPoint(0, r.x() + w2, r.y()); pa.setPoint(1, r.right(), r.y() + h2); pa.setPoint(2, r.x() + w2, r.bottom()); pa.setPoint(3, r.x(), r.y() + h2); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::Cross: { const int w2 = r.width() / 2; const int h2 = r.height() / 2; QwtPainter::drawLine(painter, r.x() + w2, r.y(), r.x() + w2, r.bottom()); QwtPainter::drawLine(painter, r.x(), r.y() + h2, r.right(), r.y() + h2); break; } case QwtSymbol::XCross: { QwtPainter::drawLine(painter, r.left(), r.top(), r.right(), r.bottom()); QwtPainter::drawLine(painter, r.left(), r.bottom(), r.right(), r.top()); break; } case QwtSymbol::Triangle: case QwtSymbol::UTriangle: { const int w2 = r.width() / 2; QwtPolygon pa(3); pa.setPoint(0, r.x() + w2, r.y()); pa.setPoint(1, r.right(), r.bottom()); pa.setPoint(2, r.x(), r.bottom()); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::DTriangle: { const int w2 = r.width() / 2; QwtPolygon pa(3); pa.setPoint(0, r.x(), r.y()); pa.setPoint(1, r.right(), r.y()); pa.setPoint(2, r.x() + w2, r.bottom()); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::RTriangle: { const int h2 = r.height() / 2; QwtPolygon pa(3); pa.setPoint(0, r.x(), r.y()); pa.setPoint(1, r.right(), r.y() + h2); pa.setPoint(2, r.x(), r.bottom()); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::LTriangle: { const int h2 = r.height() / 2; QwtPolygon pa(3); pa.setPoint(0, r.right(), r.y()); pa.setPoint(1, r.x(), r.y() + h2); pa.setPoint(2, r.right(), r.bottom()); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::HLine: { const int h2 = r.height() / 2; QwtPainter::drawLine(painter, r.left(), r.top() + h2, r.right(), r.top() + h2); break; } case QwtSymbol::VLine: { const int w2 = r.width() / 2; QwtPainter::drawLine(painter, r.left() + w2, r.top(), r.left() + w2, r.bottom()); break; } case QwtSymbol::Star1: { const double sqrt1_2 = 0.70710678118654752440; /* 1/sqrt(2) */ const int w2 = r.width() / 2; const int h2 = r.height() / 2; const int d1 = (int)( (double)w2 * (1.0 - sqrt1_2) ); QwtPainter::drawLine(painter, r.left() + d1, r.top() + d1, r.right() - d1, r.bottom() - d1); QwtPainter::drawLine(painter, r.left() + d1, r.bottom() - d1, r.right() - d1, r.top() + d1); QwtPainter::drawLine(painter, r.left() + w2, r.top(), r.left() + w2, r.bottom()); QwtPainter::drawLine(painter, r.left(), r.top() + h2, r.right(), r.top() + h2); break; } case QwtSymbol::Star2: { const int w = r.width(); const int side = (int)(((double)r.width() * (1.0 - 0.866025)) / 2.0); // 0.866025 = cos(30°) const int h4 = r.height() / 4; const int h2 = r.height() / 2; const int h34 = (r.height() * 3) / 4; QwtPolygon pa(12); pa.setPoint(0, r.left() + (w / 2), r.top()); pa.setPoint(1, r.right() - (side + (w - 2 * side) / 3), r.top() + h4 ); pa.setPoint(2, r.right() - side, r.top() + h4); pa.setPoint(3, r.right() - (side + (w / 2 - side) / 3), r.top() + h2 ); pa.setPoint(4, r.right() - side, r.top() + h34); pa.setPoint(5, r.right() - (side + (w - 2 * side) / 3), r.top() + h34 ); pa.setPoint(6, r.left() + (w / 2), r.bottom()); pa.setPoint(7, r.left() + (side + (w - 2 * side) / 3), r.top() + h34 ); pa.setPoint(8, r.left() + side, r.top() + h34); pa.setPoint(9, r.left() + (side + (w / 2 - side) / 3), r.top() + h2 ); pa.setPoint(10, r.left() + side, r.top() + h4); pa.setPoint(11, r.left() + (side + (w - 2 * side) / 3), r.top() + h4 ); QwtPainter::drawPolygon(painter, pa); break; } case QwtSymbol::Hexagon: { const int w2 = r.width() / 2; const int side = (int)(((double)r.width() * (1.0 - 0.866025)) / 2.0); // 0.866025 = cos(30°) const int h4 = r.height() / 4; const int h34 = (r.height() * 3) / 4; QwtPolygon pa(6); pa.setPoint(0, r.left() + w2, r.top()); pa.setPoint(1, r.right() - side, r.top() + h4); pa.setPoint(2, r.right() - side, r.top() + h34); pa.setPoint(3, r.left() + w2, r.bottom()); pa.setPoint(4, r.left() + side, r.top() + h34); pa.setPoint(5, r.left() + side, r.top() + h4); QwtPainter::drawPolygon(painter, pa); break; } default:; } } /*! \brief Draw the symbol at a specified point \param painter Painter \param pos Center of the symbol */ void QwtSymbol::draw(QPainter *painter, const QPoint &pos) const { QRect rect; rect.setSize(QwtPainter::metricsMap().screenToLayout(d_size)); rect.moveCenter(pos); painter->setBrush(d_brush); painter->setPen(d_pen); draw(painter, rect); } /*! \brief Specify the symbol style The following styles are defined:
NoSymbol
No Style. The symbol cannot be drawn.
Ellipse
Ellipse or circle
Rect
Rectangle
Diamond
Diamond
Triangle
Triangle pointing upwards
DTriangle
Triangle pointing downwards
UTriangle
Triangle pointing upwards
LTriangle
Triangle pointing left
RTriangle
Triangle pointing right
Cross
Cross (+)
XCross
Diagonal cross (X)
HLine
Horizontal line
VLine
Vertical line
Star1
X combined with +
Star2
Six-pointed star
Hexagon
Hexagon
\param s style */ void QwtSymbol::setStyle(QwtSymbol::Style s) { d_style = s; } //! == operator bool QwtSymbol::operator==(const QwtSymbol &other) const { return brush() == other.brush() && pen() == other.pen() && style() == other.style() && size() == other.size(); } //! != operator bool QwtSymbol::operator!=(const QwtSymbol &other) const { return !(*this == other); }