Qt之findfiles

一、建立一個基於QWidget的應用，基類選擇QWidget，類名Mindows

給combox添加可編輯屬性

 

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

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()
{

}