call drawing function out of paintGL

[wysota]

Here is a simple example, adapt it to your needs. I'm not commenting it on purpose so that you have to put some effort in understanding it.

#include <QtGui>
 
class Widget : public QWidget {
	Q_OBJECT
public:
	Widget(QWidget *parent = 0) : QWidget(parent) {}
	void addEntry(QString label, QPoint pos) {
		Entry e;
		e.label = label;
		e.pos = pos;
		QFontMetrics fm = fontMetrics();
		QRect r = fm.boundingRect(label);
		r.translate(e.pos);
		e.boundingBox = r;
		e.selected = false;
		m_entries << e;
		update();
	}
 
	void removeEntry(int which) {
		m_entries.removeAt(which);
		update();
	}
 
	int indexAt(QPoint pos) const {
		for(int i=0; i< m_entries.count(); ++i) {
			const Entry &e = m_entries.at(i);
			if(e.boundingBox.contains(pos))
				return i;
		}
		return -1;
	}
protected:
	void paintEvent(QPaintEvent *pe) {
		QPainter p(this);
		foreach(Entry e, m_entries) {
			p.save();
			if(e.selected) {
				p.setPen(Qt::red);
			}
			p.drawText(e.pos, e.label);
			p.restore();
//			p.save();
//			p.setPen(Qt::red);
//			p.drawRect(e.boundingBox);
//			p.restore();
		}
	}
	void mouseReleaseEvent(QMouseEvent *me) {
		int idx = indexAt(me->pos());
		if(idx < 0) return;
		m_entries[idx].selected = !m_entries[idx].selected;
		update();
	}
 
private:
	struct Entry {
		QString label;
		QPoint pos;
		QRect boundingBox;
		bool selected;
	};
 
	QList<Entry> m_entries;
};
 
 
#include "main.moc"
 
int main(int argc, char **argv) {
	QApplication app(argc, argv);
	Widget w;
	w.show();
	w.addEntry("Home", QPoint(100, 100));
	w.addEntry("School", QPoint(300, 200));
	w.addEntry("Work", QPoint(500, 20));
	return app.exec();
}

#include <QtGui>

class Widget : public QWidget {
	Q_OBJECT
public:
	Widget(QWidget *parent = 0) : QWidget(parent) {}
	void addEntry(QString label, QPoint pos) {
		Entry e;
		e.label = label;
		e.pos = pos;
		QFontMetrics fm = fontMetrics();
		QRect r = fm.boundingRect(label);
		r.translate(e.pos);
		e.boundingBox = r;
		e.selected = false;
		m_entries << e;
		update();
	}

	void removeEntry(int which) {
		m_entries.removeAt(which);
		update();
	}

	int indexAt(QPoint pos) const {
		for(int i=0; i< m_entries.count(); ++i) {
			const Entry &e = m_entries.at(i);
			if(e.boundingBox.contains(pos))
				return i;
		}
		return -1;
	}
protected:
	void paintEvent(QPaintEvent *pe) {
		QPainter p(this);
		foreach(Entry e, m_entries) {
			p.save();
			if(e.selected) {
				p.setPen(Qt::red);
			}
			p.drawText(e.pos, e.label);
			p.restore();
//			p.save();
//			p.setPen(Qt::red);
//			p.drawRect(e.boundingBox);
//			p.restore();
		}
	}
	void mouseReleaseEvent(QMouseEvent *me) {
		int idx = indexAt(me->pos());
		if(idx < 0) return;
		m_entries[idx].selected = !m_entries[idx].selected;
		update();
	}

private:
	struct Entry {
		QString label;
		QPoint pos;
		QRect boundingBox;
		bool selected;
	};

	QList<Entry> m_entries;
};


#include "main.moc"

int main(int argc, char **argv) {
	QApplication app(argc, argv);
	Widget w;
	w.show();
	w.addEntry("Home", QPoint(100, 100));
	w.addEntry("School", QPoint(300, 200));
	w.addEntry("Work", QPoint(500, 20));
	return app.exec();
}

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