字体对话框的实现
cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_fontbtn_clicked()
{
bool ok;
QFont ret = QFontDialog::getFont(&ok,QFont("宋体",4,4),this);
if(ok)
{
//ui->textEdit->setFont(ret);
ui->textEdit->setCurrentFont(ret);
}
else
{
QMessageBox::information(this,"提示","未选中字体");
}
}
widget.h
cpp
#ifndef SECOND_H
#define SECOND_H
#include <QWidget>
namespace Ui {
class Second;
}
class Second : public QWidget
{
Q_OBJECT
public:
explicit Second(QWidget *parent = nullptr);
~Second();
public slots:
void jump_slot();
private:
Ui::Second *ui;
};
#endif // SECOND_H
second.h
cpp
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QtDebug>
#include <QMessageBox>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
signals:
void my_jump();
private slots:
void on_pushButton_clicked();
void on_pushButton_2_clicked();
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
main.cpp
cpp
#include "widget.h"
#include "second.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
Second s;
QObject::connect( &w, &Widget::my_jump, &s, &Second::jump_slot);
w.show();
return a.exec();
}
widget.cpp
cpp
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
//去掉头部
this->setWindowFlag(Qt::FramelessWindowHint);
//去掉空白部分
this->setAttribute(Qt::WA_TranslucentBackground);
}
Widget::~Widget()
{
delete ui;
}
void Widget::on_pushButton_clicked()
{
if(ui->lineEdit->text() == "admin" && ui->lineEdit_2->text() =="123456" )
{
//弹出警告对话框,基于属性版本
QMessageBox msg(QMessageBox::Information,
"提示",
"登陆成功",
QMessageBox::Ok,
this);
int ret = msg.exec();
if(ret == QMessageBox::Ok)
{
this->close();
emit my_jump();
}
}
else
{
QMessageBox msg(QMessageBox::Warning,
"警告",
"账号与密码不匹配,是否重新登录",
QMessageBox::Yes | QMessageBox::No,
this);
int ret = msg.exec();
if(ret == QMessageBox::Yes)
{
ui->lineEdit_2->clear();
}
else
{
this->close();
}
}
}
void Widget::on_pushButton_2_clicked()
{
//弹出一个信息对话框 基于静态成员函数
int ret = QMessageBox::question(this,
"tips",
"您是否确定要退出登录",
QMessageBox::Yes | QMessageBox::No);
if(ret == QMessageBox::Yes)
{
this->close();
}
}
second.cpp
cpp
#include "second.h"
#include "ui_second.h"
Second::Second(QWidget *parent) :
QWidget(parent),
ui(new Ui::Second)
{
ui->setupUi(this);
}
Second::~Second()
{
delete ui;
}
void Second::jump_slot()
{
this->show(); //显示
}