QT實現可編輯的QLabel(QEditLabel)

可編輯的QLabel主要是用於某些填字遊戲，例如數獨，具體的實現是通過在QStackedWidget切換QLabel和QLineEdit來實現的，代碼也非常的簡單，具體怎麼用還需要自己添加新的內容

QEditLabel.h

#pragma once
#include <QStackedWidget>
#include <QLabel>
#include <QLineEdit>
#include <QEvent>
#include <QObject>

class QEditLabel : public QWidget {
	Q_OBJECT

public:
	QEditLabel(QWidget *parent = Q_NULLPTR);

protected:
	bool eventFilter(QObject * obj, QEvent * e);

private:
	QStackedWidget * m_stackWidget;
	QLabel * m_label;
	QLineEdit * m_lineEdit;

private:
	void initCtrls(void);
};

QEditLabel.cpp

#include "QEditLabel.h"

QEditLabel::QEditLabel(QWidget *parent)
	: QWidget(parent) {

	initCtrls();
}

bool QEditLabel::eventFilter(QObject * obj, QEvent * e) {
	if (obj == m_label) {
		if (QEvent::FocusIn == e->type()) {
			m_stackWidget->setCurrentWidget(m_lineEdit);
		}
	}
	else if(obj == m_lineEdit) {
		if (QEvent::FocusOut == e->type()) {
			m_stackWidget->setCurrentWidget(m_label);
		}
	}
	return QWidget::eventFilter(obj, e);
}

void QEditLabel::initCtrls(void) {
	m_stackWidget = new QStackedWidget(this);

	m_label = new QLabel("test");
	m_label->setStyleSheet("background-color:white");

	m_lineEdit = new QLineEdit();

	m_label->setFocusPolicy(Qt::FocusPolicy::ClickFocus);

	m_stackWidget->setGeometry(0, 0, 50, 50);

	m_label->installEventFilter(this);
	m_lineEdit->installEventFilter(this);

	m_stackWidget->addWidget(m_label);
	m_stackWidget->addWidget(m_lineEdit);

	m_stackWidget->setCurrentWidget(m_label);
}