#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
setWindowTitle(QStringLiteral("Qt之QVariant的使用分析"));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_2_clicked()
{
m_pVariant.setValue(5);
ui->textEdit->append(QString::number(m_pVariant.toInt()));
}
void MainWindow::on_pushButton_clicked()
{
m_pVariant.setValue(QString("aaa"));
ui->textEdit->append(m_pVariant.toString());
}
void MainWindow::on_pushButton_9_clicked()
{
m_pVariant.setValue(1.1);
ui->textEdit->append(QString::number(m_pVariant.toDouble()));
}
void MainWindow::on_pushButton_10_clicked()
{
ui->textEdit->append(QStringLiteral("太TM多了，你自己一个一个试吧！"));
}
void MainWindow::on_pushButton_4_clicked()
{
if (m_pVariant.isNull())
ui->textEdit->append("Null");
else
ui->textEdit->append("NoNull");
}
void MainWindow::on_pushButton_3_clicked()
{
m_pVariant.setValue(QString("12hf6"));
if (m_pVariant.convert(QMetaType::Int))
ui->textEdit->append("Int");
else
ui->textEdit->append("NoInt");
}
void MainWindow::on_pushButton_11_clicked()
{
m_pVariant.setValue(QString("12hf6"));
if (m_pVariant.canConvert(QMetaType::Int))
ui->textEdit->append("Int");
else
ui->textEdit->append("NoInt");
}
void MainWindow::on_pushButton_6_clicked()
{
m_pVariant.clear();
}
void MainWindow::on_pushButton_12_clicked()
{
if (m_pVariant.isValid())
ui->textEdit->append("true");
else
ui->textEdit->append("false");
}
void MainWindow::on_pushButton_5_clicked()
{
ui->textEdit->append(QString::number(m_pVariant.type()));
}
void MainWindow::on_pushButton_13_clicked()
{
ui->textEdit->append(m_pVariant.typeName());
}
void MainWindow::on_pushButton_14_clicked()
{
ui->textEdit->append(QString::number(m_pVariant.userType()));
}
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