143 lines
4.7 KiB
C++
143 lines
4.7 KiB
C++
/***************************************************************************
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* Copyright (c) 2016 WandererFan <wandererfan@gmail.com> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library 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 Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <cmath>
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# include <QPainter>
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# include <QPainterPath>
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# include <QStyleOptionGraphicsItem>
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#endif
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#include <Base/Parameter.h>
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#include <Mod/TechDraw/App/Preferences.h>
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#include "QGICenterLine.h"
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#include "PreferencesGui.h"
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using namespace TechDraw;
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using namespace TechDrawGui;
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QGICenterLine::QGICenterLine()
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{
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m_line = new QGraphicsPathItem();
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addToGroup(m_line);
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setWidth(0.0);
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setStyle(getCenterStyle());
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setColor(getCenterColor());
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m_isintersection = false; //Coverity CID 174669
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}
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void QGICenterLine::draw()
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{
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prepareGeometryChange();
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makeLine();
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update();
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}
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void QGICenterLine::makeLine()
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{
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QPainterPath pp;
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pp.moveTo(m_start);
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pp.lineTo(m_end);
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m_line->setPath(pp);
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}
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void QGICenterLine::setBounds(double x1, double y1, double x2, double y2)
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{
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m_start = QPointF(x1, y1);
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m_end = QPointF(x2, y2);
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}
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QColor QGICenterLine::getCenterColor()
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{
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return PreferencesGui::centerQColor();
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}
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Qt::PenStyle QGICenterLine::getCenterStyle()
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{
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Qt::PenStyle centerStyle = static_cast<Qt::PenStyle> (Preferences::getPreferenceGroup("Decorations")->GetInt("CenterLine", 2));
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return centerStyle;
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}
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void QGICenterLine::paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget) {
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QStyleOptionGraphicsItem myOption(*option);
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myOption.state &= ~QStyle::State_Selected;
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setTools();
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QGIDecoration::paint (painter, &myOption, widget);
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}
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void QGICenterLine::setIntersection(bool isIntersecting) {
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/**
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* Set the intersection style for the centerline.
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* If isIntersecting is set to true, the middle of the centerline
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* will be the middle of a dash - therefore if two lines intersect, they
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* will form a cross.
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* If isIntersecting is set to false, the middle of the centerline will be a
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* dot.
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*/
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m_isintersection = isIntersecting;
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}
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void QGICenterLine::setTools()
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{
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if (m_styleCurrent == Qt::DashDotLine) {
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QVector<qreal> dashes;
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qreal space = 4; // in unit width
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qreal dash = 16;
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// dot must be really small when using CapStyle RoundCap but > 0
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// for CapStyle FlatCap you would need to set it to 1
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qreal dot = 0.000001;
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dashes << dot << space << dash << space;
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qreal dashlen = dot + 2 * space + dash;
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qreal l_len = sqrt(pow(m_start.x() - m_end.x(), 2) + pow(m_start.y() - m_end.y(), 2)) / 2.0;
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// convert from pixelunits to width units
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l_len = l_len / m_width;
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// note that the additional length using RoundCap or SquareCap does not
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// count here!
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if (m_isintersection) {
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m_pen.setDashOffset(dashlen - fmod(l_len, dashlen) + space + dash / 2);
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} else {
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m_pen.setDashOffset(dashlen - fmod(l_len, dashlen));
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}
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m_pen.setDashPattern(dashes);
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}
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else {
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m_pen.setStyle(m_styleCurrent);
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}
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m_pen.setCapStyle(Qt::RoundCap);
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m_pen.setWidthF(m_width);
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m_pen.setColor(m_colCurrent);
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m_line->setPen(m_pen);
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}
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void QGICenterLine::setLinePen(QPen isoPen)
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{
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m_pen = isoPen;
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}
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