mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-16 02:25:50 +08:00
261 lines
9.6 KiB
C++
261 lines
9.6 KiB
C++
/*
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Copyright (c) 2008-2018 Jan W. Krieger (<jan@jkrieger.de>)
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This software is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License (LGPL) as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License (LGPL) for more details.
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You should have received a copy of the GNU Lesser General Public License (LGPL)
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file jkqtpdrawingtools.cpp
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* \ingroup jkqtptools
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*/
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#include "jkqtplottertools/jkqtpdrawingtools.h"
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#include "jkqtplottertools/jkqtpenhancedpainter.h"
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void JKQTPPlotSymbol(QPaintDevice& paintDevice, double x, double y, JKQTPGraphSymbols symbol, double size, double symbolLineWidth, QColor color, QColor fillColor) {
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JKQTPEnhancedPainter p(&paintDevice);
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JKQTPPlotSymbol(p, x, y, symbol, size, symbolLineWidth, color, fillColor);
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}
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void JKQTPPlotSymbol(JKQTPEnhancedPainter& painter, double x, double y, JKQTPGraphSymbols symbol, double symbolSize, double symbolLineWidth, QColor color, QColor fillColor) {
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painter.save();
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QPen p=painter.pen();
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p.setColor(color);
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p.setWidthF(qMax(JKQTPLOTTER_ABS_MIN_LINEWIDTH, symbolLineWidth));
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p.setStyle(Qt::SolidLine);
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painter.setPen(p);
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QBrush b=painter.brush();
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b.setColor(fillColor);
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b.setStyle(Qt::SolidPattern);
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const double w=symbolSize;
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const double w2=w/2.0;
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const double w3=w/3.0;
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// calculate star cordinates as static values
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static int star_items=0;
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static double starcordsx[10];
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static double starcordsy[10];
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if (star_items==0) {
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star_items=5;
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double angle=360.0/double(star_items)/180.0*M_PI;
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for (int i=0; i<star_items; i++) {
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double a=((double)i+0.5)*angle;
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starcordsx[i*2]=sin(a);
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starcordsx[i*2+1]=0.5*sin(a+angle/2.0);
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starcordsy[i*2]=cos(a);
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starcordsy[i*2+1]=0.5*cos(a+angle/2.0);
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}
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}
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switch(symbol) {
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case JKQTPDot:
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painter.drawPoint(QPointF(x,y));
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break;
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case JKQTPCross:{
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/*QVector<QLineF> lines;
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lines<<QLineF(x-w2,y-w2,x+w2,y+w2);
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lines<<QLineF(x-w2,y+w2,x+w2,y-w2);
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painter.drawLines(lines);*/
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QPainterPath path;
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path.moveTo(x-w2,y-w2);
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path.lineTo(x+w2,y+w2);
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path.moveTo(x-w2,y+w2);
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path.lineTo(x+w2,y-w2);
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painter.drawPath(path);
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}
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break;
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case JKQTPPlus:{
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QVector<QLineF> lines;
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lines<<QLineF(x,y-w2,x,y+w2);
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lines<<QLineF(x-w2,y,x+w2,y);
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painter.drawLines(lines);
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}
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break;
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case JKQTPCircle:{
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawEllipse(rectangle);
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}
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break;
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case JKQTPTarget:{
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QPainterPath path;
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QRectF rectangle3(x-w3, y-w3, 2.0*w3, 2.0*w3);
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path.addEllipse(rectangle3);
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path.moveTo(QPointF(x,y-w2));
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path.lineTo(QPointF(x,y+w2));
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path.moveTo(QPointF(x-w2,y));
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path.lineTo(QPointF(x+w2,y));
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painter.drawPath(path);
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}
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break;
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case JKQTPFilledCircle:{
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painter.setBrush(b);
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawEllipse(rectangle);
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}
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break;
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case JKQTPRect:{
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painter.setBrush(QColor(Qt::transparent));
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawRect(rectangle);
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}
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break;
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case JKQTPRectCross:{
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painter.setBrush(QColor(Qt::transparent));
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QPainterPath path;
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path.moveTo(x-w2,y-w2);
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path.lineTo(x+w2,y+w2);
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path.moveTo(x-w2,y+w2);
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path.lineTo(x+w2,y-w2);
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painter.drawPath(path);
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawRect(rectangle);
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}
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break;
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case JKQTPRectPlus:{
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painter.setBrush(QColor(Qt::transparent));
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QVector<QLineF> lines;
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lines<<QLineF(x,y-w2,x,y+w2);
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lines<<QLineF(x-w2,y,x+w2,y);
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painter.drawLines(lines);
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawRect(rectangle);
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}
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break;
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case JKQTPFilledRect:{
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painter.setBrush(b);
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QRectF rectangle(x-w2, y-w2, w, w);
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painter.drawRect(rectangle);
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}
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break;
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case JKQTPTriangle: {
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painter.setBrush(QColor(Qt::transparent));
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QPolygonF poly;
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poly<<QPointF(x-w2, y+w2)<<QPointF(x+w2, y+w2)<<QPointF(x, y-w2);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPFilledTriangle: {
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painter.setBrush(b);
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QPolygonF poly;
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poly<<QPointF(x-w2, y+w2)<<QPointF(x+w2, y+w2)<<QPointF(x, y-w2);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPDownTriangle: {
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painter.setBrush(QColor(Qt::transparent));
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QPolygonF poly;
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poly<<QPointF(x-w2, y-w2)<<QPointF(x+w2, y-w2)<<QPointF(x, y+w2);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPFilledDownTriangle: {
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painter.setBrush(b);
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QPolygonF poly;
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poly<<QPointF(x-w2, y-w2)<<QPointF(x+w2, y-w2)<<QPointF(x, y+w2);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPDiamond: {
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QPolygonF poly;
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painter.setBrush(QColor(Qt::transparent));
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poly<<QPointF(x, y-w2)<<QPointF(x+w2, y)<<QPointF(x, y+w2)<<QPointF(x-w2, y);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPFilledDiamond: {
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painter.setBrush(b);
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QPolygonF poly;
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poly<<QPointF(x, y-w2)<<QPointF(x+w2, y)<<QPointF(x, y+w2)<<QPointF(x-w2, y);
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPstar: {
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painter.setBrush(QColor(Qt::transparent));
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QPolygonF poly;
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for (int i=0; i<star_items*2; i++) {
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poly<<QPointF(x+starcordsx[i]*w2, y+starcordsy[i]*w2);
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}
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPFilledStar: {
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painter.setBrush(b);
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QPolygonF poly;
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for (int i=0; i<star_items*2; i++) {
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poly<<QPointF(x+starcordsx[i]*w2, y+starcordsy[i]*w2);
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}
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPPentagon: {
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painter.setBrush(QColor(Qt::transparent));
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QPolygonF poly;
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for (int i=0; i<star_items*2; i+=2) {
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poly<<QPointF(x+starcordsx[i]*w2, y+starcordsy[i]*w2);
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}
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painter.drawConvexPolygon(poly);
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} break;
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case JKQTPAsterisc: {
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//QVector<QLineF> lines;
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QPainterPath path;
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for (int i=0; i<star_items*2; i+=2) {
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//lines<<QLineF(x+starcordsx[i]*w2, y+starcordsy[i]*w2, x, y);
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path.moveTo(x+starcordsx[i]*w2, y+starcordsy[i]*w2);
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path.lineTo(x,y);
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}
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//painter.drawLines(lines);
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painter.drawPath(path);
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} break;
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case JKQTPFilledPentagon: {
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painter.setBrush(b);
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QPolygonF poly;
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for (int i=0; i<star_items*2; i+=2) {
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poly<<QPointF(x+starcordsx[i]*w2, y+starcordsy[i]*w2);
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}
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painter.drawConvexPolygon(poly);
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} break;
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default: break;
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}
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painter.restore();
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};
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QVector<QPointF> JKQTPDrawEllipse(double x, double y, double a, double b, double angle_start, double angle_end, double alpha, int controlPoints, QPointF* x_start, QPointF* x_end) {
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QVector<QPointF> result;
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double start=angle_start*M_PI/180.0;
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double stop=angle_end*M_PI/180.0;
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double step=(stop-start)/(double)controlPoints;
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while (fabs(stop-start)/step<10) step=step/2.0;
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double sina=sin(1.0*alpha/180.0*M_PI);
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double cosa=cos(1.0*alpha/180.0*M_PI);
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QPointF xp(x+a*cos(start)*cosa-b*sin(start)*sina, y+a*cos(start)*sina+b*sin(start)*cosa);
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result.append(xp);
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if (x_start) *x_start = xp;
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double t=start+step;
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for (int i=1; i<controlPoints; i++) {
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double cost=cos(t);
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double sint=sin(t);
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xp=QPointF( x+a*cost*cosa-b*sint*sina, y+a*cost*sina+b*sint*cosa);
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result.append(xp);
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//std::cout<<"t="<<t/M_PI*180.0<<": sin(al)="<<sina<<" cos(al)="<<cosa<<" sin(t)="<<sint<<" cos(t)="<<cost<<" a="<<a<<" b="<<b<<": ("<<x+a*cost*cosa-b*sint*sina<<", "<<y+a*cost*sina+b*sint*cosa<<") = ("<<xp.x()<<", "<<xp.y()<<") \n";
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t=t+step;
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}
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if (x_end) *x_end=xp;
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return result;
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}
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