Label cut off

[StefanoD]

Hi,
I try to develop a Sudoku game and I want to show in a cell not only the current value, but also possible candidates in the corners of the cell. That is, top-left, top-right, top-center, center-left, center-right, bottom-left, bottom-center, bottom-right.
Additionally, I want to highlight the current value with a bigger font-size.
My problem is, that QLabel which represents the current value, is cut-off:

In this mockup, the value "C" is cut-off.

Each line is represented by a QHBoxLayout and all lines are wrapped up with QVBoxLayout. The cells are then inserted in a QGridLayout.
Here the header of Cell:

#pragma once

#include <QFrame>

class QLabel;
class QHBoxLayout;
class QVBoxLayout;

class Cell : public QFrame
{
    Q_OBJECT
public:
    explicit Cell(QWidget *parent = nullptr);

    void setValue(int value);
    int getValue() const;

    QSize minimumSizeHint() const override;

private:
    QVBoxLayout *m_cellContainer;
    QHBoxLayout *m_center;
    QHBoxLayout *m_top;
    QHBoxLayout *m_bottom;
    QLabel *m_valueLabel;
    int m_value;

    void initCenter();
    void initTop();
    void initBottom();
};

Here the cpp of Cell:

#include "view/CellPanel.h"

#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QLabel>

Cell::Cell(QWidget *parent)
        : QFrame{parent},
          m_cellContainer{new QVBoxLayout()},
          m_center{new QHBoxLayout()},
          m_top{new QHBoxLayout()},
          m_bottom{new QHBoxLayout()},
          m_valueLabel{new QLabel("C")},
          m_value{0}
{
    initCenter();
    initTop();
    initBottom();

    setFrameStyle(QFrame::Panel);
    setLineWidth(2);
    setLayout(m_cellContainer);

    m_cellContainer->addLayout(m_top);
    m_cellContainer->addLayout(m_center);
    m_cellContainer->addLayout(m_bottom);
}

void Cell::setValue(int value)
{
    m_value = value;
    m_valueLabel->setText(QString::number(value));
}

int Cell::getValue() const
{
    return m_value;
}

QSize Cell::minimumSizeHint() const
{
    return m_center->sizeHint();
}

void Cell::initCenter()
{
    auto font = m_valueLabel->font();
    font.setPointSize(font.pointSize() * 2);
    m_valueLabel->setFont(font);

    m_center->addWidget(new QLabel("L"), 0, Qt::AlignLeft);
    m_center->addWidget(m_valueLabel, 0, Qt::AlignCenter);
    m_center->addWidget(new QLabel("R"), 0, Qt::AlignRight);
}

void Cell::initTop()
{
    m_top->addWidget(new QLabel("T L"), 0, Qt::AlignLeft | Qt::AlignTop);
    m_top->addWidget(new QLabel("T C"), 0, Qt::AlignCenter | Qt::AlignTop);
    m_top->addWidget(new QLabel("T R"), 0, Qt::AlignRight | Qt::AlignTop);
}

void Cell::initBottom()
{
    m_bottom->addWidget(new QLabel("B L"), 0, Qt::AlignLeft | Qt::AlignBottom);
    m_bottom->addWidget(new QLabel("B C"), 0, Qt::AlignCenter | Qt::AlignBottom);
    m_bottom->addWidget(new QLabel("B R"), 0, Qt::AlignRight | Qt::AlignBottom);
}

Here the cells are inserted as Blocks into a QGridLayout:

#pragma once

#include <QFrame>

class QGridLayout;

class BlockPanel: public QFrame
{
Q_OBJECT
public:
    explicit BlockPanel(QWidget *parent = nullptr);

private:
    QGridLayout *m_blocks;

    void initBlocks();
};

#include "view/BlockPanel.h"

#include "view/CellPanel.h"

#include <QGridLayout>

BlockPanel::BlockPanel(QWidget *parent)
        : QFrame{parent}, m_blocks(new QGridLayout(this))
{
    initBlocks();
}

void BlockPanel::initBlocks()
{
    constexpr int blockSize = 3;

    for (int blockRow = 0; blockRow < blockSize; ++blockRow)
    {
        for (int blockColumn = 0; blockColumn < blockSize; ++blockColumn)
        {
            m_blocks->addWidget(new Cell(), blockRow, blockColumn);
        }
    }

    Cell cell;
    m_blocks->setRowMinimumHeight(1, cell.baseSize().height());
}

Any ideas, how to fix this?

Thanks in advance! :-)