[英]Why I can't connect QAction SIGNAL with QFileDialog SLOT?
I'm trying to write application's menu for my text editor, but I don't understand why signal triggered
does not working. 我正在尝试为我的文本编辑器编写应用程序的菜单,但是我不明白为什么信号triggered
无法正常工作。 It should open a QFileDialog::getOpenFileName
, but it does not happen. 它应该打开QFileDialog::getOpenFileName
,但是不会发生。 Why? 为什么?
main.cpp main.cpp
#include "mainwindow.h"
#include "centralwidget.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow *mainWindow = new MainWindow;
CentralWidget *centralWidget = new CentralWidget;
mainWindow->setCentralWidget(centralWidget);
mainWindow->show();
return a.exec();
}
mainwindow.h 主窗口
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QMenu>
#include <QMenuBar>
#include <QStatusBar>
#include <QAction>
#include <QFileDialog>
#include <QString>
class MainWindow : public QMainWindow
{
public:
MainWindow();
public slots:
void slotFileDialog();
};
#endif // MAINWINDOW_H
mainwindow.cpp 主窗口
#include "mainwindow.h"
MainWindow::MainWindow()
{
QMenu *fileMenu = new QMenu("File");
QAction *openAction = new QAction(tr("&Open..."), this);
connect(openAction, SIGNAL(triggered()),
this, SLOT(slotFileDialog()));
fileMenu->addAction(openAction);
QMenuBar *mainMenu = new QMenuBar;
mainMenu->addMenu(fileMenu);
mainMenu->show();
QStatusBar *mainStatusBar = new QStatusBar;
setMenuBar(mainMenu);
setStatusBar(mainStatusBar);
}
void MainWindow::slotFileDialog()
{
QString fileName = QFileDialog::getOpenFileName(
this, tr("Open File"),"/home",tr("Text (*.txt)"));
}
您没有在类定义中包含Q_OBJECT
宏,因此moc
将不会为其生成关联的文件。
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