mySignalSlot.pro
#-------------------------------------------------
#
# Project created by QtCreator 2011-04-23T11:05:03
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = mySignalSlot
TEMPLATE = app
SOURCES += main.cpp\
widget.cpp \
mydialog.cpp
HEADERS += widget.h \
mydialog.h
FORMS += widget.ui \
mydialog.ui
mydialog.h
#ifndef MYDIALOG_H
#define MYDIALOG_H
#include <QDialog>
namespace Ui {
class MyDialog;
}
class MyDialog : public QDialog
{
Q_OBJECT
public:
explicit MyDialog(QWidget *parent = 0);
~MyDialog();
private slots:
void on_pushButton_clicked();
signals:
void dlgReturn(int); //自定义的信号
private:
Ui::MyDialog *ui;
};
#endif // MYDIALOG_H
widget.h
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
namespace Ui {
class Widget;
}
class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
~Widget();
private slots:
void showValue(int value);
private:
Ui::Widget *ui;
};
#endif // WIDGET_H
main.cpp
#include <QApplication>
#include "widget.h"
#include <QTextCodec>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8"));
Widget w;
w.show();
return a.exec();
}
mydialog.cpp
#include "mydialog.h"
#include "ui_mydialog.h"
MyDialog::MyDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::MyDialog)
{
ui->setupUi(this);
}
MyDialog::~MyDialog()
{
delete ui;
}
// 确定按钮
void MyDialog::on_pushButton_clicked()
{
// 获取输入的数值
int value = ui->spinBox->value();
// 发射信号
emit dlgReturn(value);
// 关闭对话框
close();
}
widget.cpp
#include "mydialog.h"
#include "ui_mydialog.h"
MyDialog::MyDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::MyDialog)
{
ui->setupUi(this);
}
MyDialog::~MyDialog()
{
delete ui;
}
// 确定按钮
void MyDialog::on_pushButton_clicked()
{
// 获取输入的数值
int value = ui->spinBox->value();
// 发射信号
emit dlgReturn(value);
// 关闭对话框
close();
}