#include "CLineEditWithBt.h"
#include <QCoreApplication>
#include <QEvent>
#include <QHBoxLayout>
#include <QFileDialog>
#include <QToolButton>
#include <QLineEdit>
#include <QDir>

CLineEditWithBt::CLineEditWithBt(QWidget *parent, const QString &filePath, Option option)
    :QWidget(parent),m_filePath(filePath),m_option(option)
{
    QHBoxLayout *layout = new QHBoxLayout(this);
    m_edit = new QLineEdit(this);
    m_edit->installEventFilter(this);
    m_button = new QToolButton(this);
    m_button->setText("...");
    m_button->setFixedSize(21,20);
    layout->addWidget(m_edit);
    layout->addWidget(m_button);
    layout->setMargin(0);
    layout->setSpacing(0);
    this->setLayout(layout);

    connect(m_button, SIGNAL(clicked()), this, SLOT(getFilePath()));
}

CLineEditWithBt::~CLineEditWithBt()
{

}

QString CLineEditWithBt::text()
{
    return m_edit->text();
}

void CLineEditWithBt::setText(const QString &text)
{
    m_edit->setText(text);
}

void CLineEditWithBt::getFilePath()
{
    QFileDialog *dialog = new QFileDialog(this, tr("选择文件"), m_filePath+text());
    dialog->setOption(QFileDialog::DontUseNativeDialog);
    dialog->setAttribute(Qt::WA_DeleteOnClose);
    connect(dialog, SIGNAL(fileSelected(QString)), this, SLOT(setFilePath(QString)));
    dialog->show();
}

void CLineEditWithBt::setFilePath(const QString &name)
{
    if(name != QString())
    {
        QDir dir;
        switch (m_option) {
        case GetFile:
        {
            dir.cd(m_filePath);
            break;
        }
        case GetPath:
        {
            dir.cd(QCoreApplication::applicationDirPath());
            break;
        }
        default:
            break;
        }

        QString text = dir.relativeFilePath(name);
        if(text.right(4) == ".exe")
        {
            text.remove(-4, 4);
        }
        setText(text);
    }
}

bool CLineEditWithBt::eventFilter(QObject *watched, QEvent *event)
{
    if(watched == m_edit)
    {
        if (event->type() == QEvent::FocusOut)
        {
            this->setFocus();
            return true;
        }
        else
        {
            return false;
        }
    }

    return QWidget::eventFilter(watched, event);
}