自定义菜单栏

Posted 2021-09-05 Respect@

自定义菜单栏

• 自定义菜单栏

自定义菜单栏

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "myaction.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    MyAction *action = new MyAction;
    QMenu* menu = ui->menuBar->addMenu("编辑(&E)");
    menu->addAction(action);

    connect(action,&MyAction::getText,this,&MainWindow::setText);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::setText(const QString &str)
{
    ui->textEdit->setText(str);
}

#include "myaction.h"
#include <QSplitter>
#include <QLabel>

MyAction::MyAction(QObject* parent):QWidgetAction(parent)
{
    lineEdit = new QLineEdit;
    connect(lineEdit,&QLineEdit::returnPressed,
            this,&MyAction::sendText);
}

QWidget *MyAction::createWidget(QWidget *parent)
{
    //判断父部件是否继承自菜单或者工具栏
    //如果是则创建父部件的子部件并放回子部件
    if(parent->inherits("QMenu") || parent->inherits("QToolBar")){
        QSplitter *splitter = new QSplitter(parent);
        QLabel *label = new QLabel("插入文本:");
        splitter->addWidget(label);
        splitter->addWidget(lineEdit);
        return splitter;
    }
    return 0;
}

void MyAction::sendText()
{
    emit getText(lineEdit->text());
    lineEdit->clear();
}

main.cpp

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void setText(const QString& str);

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

myaction.h

#ifndef MYACTION_H
#define MYACTION_H
#include <QWidgetAction>
#include <QLineEdit>

class MyAction : public QWidgetAction
{
    Q_OBJECT
public:
    MyAction(QObject* parent = 0);

protected:
    QWidget* createWidget(QWidget *parent);

signals:
    void getText(const QString& string);

private slots:
    void sendText();

private:
    QLineEdit* lineEdit;
};

#endif // MYACTION_H