Qt学习例子8——filechooser

最新推荐文章于 2024-11-02 20:33:07 发布

ITvsET

最新推荐文章于 2024-11-02 20:33:07 发布

阅读量1.1k

点赞数

CC 4.0 BY-SA版权

分类专栏： Qt 文章标签： qt button file signal layout path

本文链接：https://blog.youkuaiyun.com/ITvsET/article/details/6309309

16 篇文章

订阅专栏

这篇博客介绍了如何在Qt中使用文件对话框加载文件，通过分析`filechooser.h`，`filechooser.cpp`和`main.cpp`的代码示例，展示了信号与槽的机制以及布局管理。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

文件对话框，加载文件的

//filechooser.h

#ifndef FILECHOOSER_H

#define FILECHOOSER_H

#include <QWidget>

#include <QResizeEvent>

class QLineEdit;

class QPushButton;

class FileChooser : public QWidget

    Q_OBJECT

public:

    FileChooser(QWidget *parent = 0);

    QString file()const;

    void setFile(const QString &file);

protected:

    void moveEvent(QMoveEvent *event);

    void resizeEvent(QResizeEvent* event);

public slots:

    void chooseFile();

private:

    QLineEdit *lineEdit;

    QPushButton *button;

};

#endif // FILECHOOSER_H

//filechooser.cpp

#include "filechooser.h"

#include <QFileDialog>

#include <QLayout>

#include <QLineEdit>

#include <QPushButton>

FileChooser::FileChooser(QWidget *parent)

    : QWidget(parent)

    lineEdit = new QLineEdit(this);

    button = new QPushButton(tr("..."), this);

    lineEdit->setGeometry(5, 5, 200, 20);

    button->setGeometry(210, 5, 20, 20);

    // enter your code here

    // create a layout, set it on the widget and add the two child widgets to it

    // make a signal-slot connection between the two widgets

//

    QHBoxLayout *lay=new QHBoxLayout(this);

    //QRect rc(0,0,445,30);

    //lay->setGeometry(rc);

    //lay->setMargin( 15);

    //lay->setSpacing( 10);

    lay->addWidget(lineEdit);

    lay->addWidget(button);

//    connect(this,SIGNAL(moveEvent(QMoveEvent*)),this,SLOT(updateSize()));

    connect(button,SIGNAL(clicked()),this,SLOT(chooseFile()));

void FileChooser::chooseFile()

    // enter your code here

    // ask the user for a file name and set its path as text of lineEdit

    //qDebug("choosing!");

    QString fileName = QFileDialog::getOpenFileName(this, tr("Open File"),

                                                     "D://Qt//filechooser",

                                                     tr("Files (*.cpp *.h *.pro)"));

    //注意这里/不能只有一个会被解释成转义字符

    lineEdit->setText(fileName);

void FileChooser::moveEvent(QMoveEvent *event)

    qDebug("Moving!");

void FileChooser::resizeEvent(QResizeEvent* event)

    //qDebug("Reszing!");

    int h,w;

    h=event->size().height();

    w=event->size().width();

    lineEdit->setGeometry(5,5,w*0.7-5,h-5);

    button->setGeometry(w*0.7+5,5,w*0.3-5,h-5);

QString FileChooser::file() const

    return lineEdit->text();

void FileChooser::setFile(const QString &file)

    lineEdit->setText(file);

//main.cpp

#include <QtGui/QApplication>

#include "filechooser.h"

int main(int argc, char *argv[])

    QApplication a(argc, argv);

    FileChooser w;

    w.show();

    return a.exec();

程序运行结果图：