Qt之findfiles

1、創建一個基於QWidget的應用，基類選擇QWidget，類名Mindows

實現選擇目錄功能：

window.h中：

#ifndef WINDOW_H
#define WINDOW_H
#include <qwidget>
QT_BEGIN_NAMESPACE
class QComboBox;
QT_END_NAMESPACE
class Window : public QWidget
{
 Q_OBJECT
public:
 Window(QWidget *parent = 0);
 ~Window();
private slots:
 void browse();
private:
 QComboBox *createComboBox(const QString &text = QString());
 QComboBox *directoryComboBox;
};
#endif // WINDOW_H
/<qwidget>

main.cpp中

#include "window.h"
#include <qtwidgets>
void Window::browse()
{
 QString directory =
 QDir::toNativeSeparators(QFileDialog::getExistingDirectory(
 this,
 tr("find files"),
 QDir::currentPath()));
 if (!directory.isEmpty()) {
 if (directoryComboBox->findText(directory) == -1)
 directoryComboBox->addItem(directory);
 directoryComboBox->setCurrentIndex(directoryComboBox->findText(directory));
 }
}
QComboBox *Window::createComboBox(const QString &text)
{
 QComboBox *comboBox = new QComboBox;
 comboBox->addItem(text);
 comboBox->setEditable(true);
 comboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
 return comboBox;
}
Window::Window(QWidget *parent)
 : QWidget(parent)
{
 QPushButton *browseButton = new QPushButton(tr("&Browse..."), this);
 connect(browseButton, &QAbstractButton::clicked, this, &Window::browse);
 directoryComboBox = createComboBox(QDir::toNativeSeparators(QDir::currentPath()));
 QGridLayout *mainLayout = new QGridLayout(this);
 mainLayout->addWidget(new QLabel(tr("In directory:")), 2, 0);
 mainLayout->addWidget(directoryComboBox, 2, 1);
 mainLayout->addWidget(browseButton, 2, 2);
 setWindowTitle(tr("Find Files"));
 const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
 resize(screenGeometry.width() / 4, screenGeometry.height() / 6);
}
Window::~Window()
{
}
/<qtwidgets>