Subclassing QLabel to show native 'Mouse Hover Button indicator'

Question

I have a QLabel with a \'StyledPanel, raised\' frame.
It is clickable, by subclassing QLabel;

class InteractiveLabel(QtGui.QLabel):
    def __init__(self         


        

Answer 1

Main idea

You can add QLabelabove QPushButton (make QLabel child of QPushButton) and show rich text in label, while clicks and decorations can be processed with QPushButton

Experiment

Well, I am a C++ programmer, but there is nothing complicated, I hope, you understand the code

• Implementing main idea:

  QLabel * label = new QLabel(pushButton);
  label->setText("<strong>sss</strong>");
  label->setAlignment(Qt::AlignCenter);
  label->setMouseTracking(false);
  pushButton->setLayout(new QVBoxLayout(pushButton));
  pushButton->layout()->setMargin(0);
  pushButton->layout()->addWidget(label);
  

  And this almost works! The only one silly bug (or my global misunderstanding) is that when you press button with mouse and then release it, it remains pressed.

- So, it seems we need to reimplement mouseReleaseEvent in our label to fix always pressed issue:

I'm pretty sure, there is a bit more elegant solution, but I'm too lazy to find it now, so, I made following:

    class TransperentLabel: public QLabel
    {
    public:
        TransperentLabel(QWidget* parent):QLabel(parent) {}
    protected:
        void mouseReleaseEvent(QMouseEvent *ev)
        {
            /*
            QApplication::sendEvent(parent(), ev); -- does not help :(
            */
            static_cast<QPushButton*>(parent())->setDown(false);
            static_cast<QPushButton*>(parent())->click(); //fixing click signal issues
        }
    };

• As @Roku said, to fix that issue, we have to add

  label->setTextInteractionFlags(Qt::NoTextInteraction);
  

Answer 2

@Lol4t0, i have some improvements for your method...

This is my header file:

#ifndef QLABELEDPUSHBUTTON_H
#define QLABELEDPUSHBUTTON_H

#include <QPushButton>

class QLabel;

class QLabeledPushButton : public QPushButton
{
    Q_OBJECT

    QLabel * m_label;

public:
    QLabeledPushButton(QWidget * parent = 0);

    QString text() const;
    void setText(const QString & text);

protected:
    void resizeEvent(QResizeEvent * event);
};

#endif // QLABELEDPUSHBUTTON_H

And there is my cpp file:

#include <QLabel>
#include <QVBoxLayout>
#include <QResizeEvent>
#include "QLabeledPushButton.h"

QLabeledPushButton::QLabeledPushButton(QWidget * parent)
    : QPushButton(parent)
    , m_label(new QLabel(this))
{
    m_label->setWordWrap(true);
    m_label->setMouseTracking(false);
    m_label->setAlignment(Qt::AlignCenter);
    m_label->setTextInteractionFlags(Qt::NoTextInteraction);
    m_label->setGeometry(QRect(4, 4, width()-8, height()-8));
}

QString QLabeledPushButton::text() const
{
    return m_label->text();
}

void QLabeledPushButton::setText(const QString & text)
{
    m_label->setText(text);
}

void QLabeledPushButton::resizeEvent(QResizeEvent * event)
{
    if (width()-8 < m_label->sizeHint().width())
        setMinimumWidth(event->oldSize().width());
    if (height()-8 < m_label->sizeHint().height())
        setMinimumHeight(event->oldSize().height());

    m_label->setGeometry(QRect(4, 4, width()-8, height()-8));
}

So text on QLabel is always visible. QPushButton can't be too small to hide part of text. I think this way is more comfortable to use...