Strongly restructured the glLabel utility class for writing on opengl/qt painter context. Added methods for on screen printing on the viewport corners with almost automatic line managment.
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80a8c29144
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@ -29,23 +29,120 @@
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#include <QPainter>
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#include <QPainter>
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namespace vcg
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namespace vcg
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{
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{
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/*
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*/
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class glLabel
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class glLabel
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{
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{
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public:
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public:
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class Mode
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{
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public:
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Mode()
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{
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color=vcg::Color4b(vcg::Color4b::White);
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angle=0;
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rightAlign = false;
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qFont.setStyleStrategy(QFont::NoAntialias);
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qFont.setFamily("Helvetica");
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qFont.setPixelSize(12);
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}
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Mode(QFont &_qFont, vcg::Color4b _color, float _angle,bool _rightAlign)
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{
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qFont=_qFont;
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color=_color;
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angle=_angle;
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rightAlign=_rightAlign;
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}
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float angle;
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bool rightAlign;
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vcg::Color4b color;
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QFont qFont;
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};
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private:
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static void enter2D(QPainter *painter)
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{
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glPushAttrib(GL_ENABLE_BIT);
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glDisable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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painter->endNativePainting();
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painter->save();
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}
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static void exit2D(QPainter *painter)
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{
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checkGLError::qDebug("glLabel");
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painter->restore();
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painter->beginNativePainting();
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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glPopAttrib();
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checkGLError::qDebug("glLabel");
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}
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public:
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enum LabelPosition { TOP_LEFT, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_RIGHT} ;
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static void render2D(QPainter *painter, const LabelPosition pos, const QString &text, const Mode &m=Mode())
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{
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render2D(painter,pos,0,text,m);
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}
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static void render2D(QPainter *painter, const LabelPosition pos, int linePos, const QString &text, const Mode &m=Mode())
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{
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Mode lm = m;
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if(pos == TOP_RIGHT || pos == BOTTOM_RIGHT)
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lm.rightAlign=true;
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GLint view[4];
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glGetIntegerv(GL_VIEWPORT, view);
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QFontMetrics qfm(m.qFont);
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float delta = qfm.ascent()/2;
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switch(pos)
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{
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case TOP_LEFT : render2D(painter,vcg::Point2f(delta, view[3]-3*delta - delta*3*linePos),text,lm); break;
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case TOP_RIGHT : render2D(painter,vcg::Point2f(view[2]-delta, view[3]-3*delta - delta*3*linePos),text,lm); break;
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case BOTTOM_LEFT : render2D(painter,vcg::Point2f(delta, 3*delta + delta*3*linePos),text,lm); break;
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case BOTTOM_RIGHT : render2D(painter,vcg::Point2f(view[2]-delta, 3*delta + delta*3*linePos),text,lm); break;
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}
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}
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/*
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*/
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static void render2D(QPainter *painter, const vcg::Point2f &p, const QString &text, const Mode &m)
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{
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GLint view[4];
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glGetIntegerv(GL_VIEWPORT, view);
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QFontMetrics qfm(m.qFont);
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QRect textBox = qfm.boundingRect(text);
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glLabel::enter2D(painter);
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painter->setRenderHint(QPainter::TextAntialiasing);
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painter->setPen(vcg::ColorConverter::ToQColor(m.color));
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painter->setFont(m.qFont);
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painter->translate(QPointF(p[0],view[3]-p[1]));
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painter->rotate(m.angle);
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QPoint base(0,qfm.ascent()/2);
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if(m.rightAlign)
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base.setX(-textBox.width() -qfm.maxWidth());
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painter->drawText(base,text);
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glLabel::exit2D(painter);
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}
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static void render(QPainter *painter, const vcg::Point3f &p, const QString &text)
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static void render(QPainter *painter, const vcg::Point3f &p, const QString &text)
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{
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{
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QFont qFont;
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Mode m;
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qFont.setStyleStrategy(QFont::NoAntialias);
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render(painter,p,text,m);
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qFont.setFamily("Helvetica");
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qFont.setPixelSize(12);
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vcg::Color4b color(vcg::Color4b::White);
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render(painter,p,text,qFont,color);
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}
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}
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static void render(QPainter *painter, const vcg::Point3f &p, const QString &text, QFont qFont, vcg::Color4b color, float angle =0,bool rightAlign=false)
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static void render(QPainter *painter, const vcg::Point3f &p, const QString &text, Mode &m)
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{
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{
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GLdouble model[16];
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GLdouble model[16];
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GLdouble proj[16];
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GLdouble proj[16];
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@ -58,47 +155,29 @@ namespace vcg
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gluProject(p[0],p[1],p[2],model,proj,view,&winx,&winy,&winz);
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gluProject(p[0],p[1],p[2],model,proj,view,&winx,&winy,&winz);
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glPushAttrib(GL_ENABLE_BIT);
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QFontMetrics qfm(m.qFont);
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glDisable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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QFontMetrics qfm(qFont);
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QRect textBox = qfm.boundingRect(text);
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QRect textBox = qfm.boundingRect(text);
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painter->endNativePainting();
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glLabel::enter2D(painter);
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painter->save();
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painter->setRenderHint(QPainter::TextAntialiasing);
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painter->setRenderHint(QPainter::TextAntialiasing);
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painter->setPen(vcg::ColorConverter::ToQColor(color));
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painter->setPen(vcg::ColorConverter::ToQColor(m.color));
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painter->setFont(qFont);
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painter->setFont(m.qFont);
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//qDebug("Printing at %f %f (%f %f %f) '%s'",winx,winy,p[0],p[1],p[2],qPrintable(text));
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painter->translate(QPointF(winx,view[3]-winy));
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painter->translate(QPointF(winx,view[3]-winy));
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painter->rotate(angle);
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painter->rotate(m.angle);
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//painter->drawText(QPointF(0,0),text);
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//painter->drawText(QRect(),Qt::AlignLeft+Qt::AlignVCenter,text);
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//painter->drawText(QRect(view[0],view[1],view[2],view[3]),Qt::AlignLeft+Qt::AlignVCenter,text);
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//QPoint base(0,textBox.height()/2);
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QPoint base(0,qfm.ascent()/2);
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QPoint base(0,qfm.ascent()/2);
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if(rightAlign)
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if(m.rightAlign)
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base.setX(-textBox.width() -qfm.maxWidth());
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base.setX(-textBox.width() -qfm.maxWidth());
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painter->drawText(base,text);
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painter->drawText(base,text);
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//painter->drawText(QPointF(winx,view[3]-winy),text);
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painter->restore();
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glLabel::exit2D(painter);
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painter->beginNativePainting();
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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glPopAttrib();
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checkGLError::qDebug("myRenderText");
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}
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}
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static void render(QPainter *painter, const vcg::Point3d &p, const QString &text)
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static void render(QPainter *painter, const vcg::Point3d &p, const QString &text)
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{ render(painter,Point3f::Construct(p),text); }
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{ render(painter,Point3f::Construct(p),text); }
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static void render(QPainter *painter, const vcg::Point3d &p, const QString &text, QFont qFont, vcg::Color4b color)
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static void render(QPainter *painter, const vcg::Point3d &p, const QString &text, Mode &m)
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{ render(painter,Point3f::Construct(p),text,qFont,color); }
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{ render(painter,Point3f::Construct(p),text,m); }
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};
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};
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} // end namespace
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} // end namespace
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