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：
