QPushButton *minimumSizeButton(const std::string &text, QWidget *parent)
{
QPushButton *button = new QPushButton(text.c_str(), parent);
QSize textSize = button->fontMetrics().size(Qt::TextShowMnemonic, button->text());
QStyleOptionButton opt;
opt.initFrom(button);
opt.rect.setSize(textSize);
button->setMinimumSize(button->style()->sizeFromContents(QStyle::CT_PushButton, &opt, textSize, button));
button->setMaximumSize(button->style()->sizeFromContents(QStyle::CT_PushButton, &opt, textSize, button));
return button;
}
//Construct the base GUI, and connect the signals
void FileLineEdit::init(QString title, QFileDialog::FileMode mode)
{
//Layout
QHBoxLayout *layout = new QHBoxLayout(this);
layout->setSpacing(0);
layout->setMargin(0);
//Line edit
_line = new QLineEdit();
layout->addWidget(_line);
CONNECT(_line, SIGNAL(textChanged(QString)), this, SLOT(updateFileName(QString)));
//Button
QPushButton *button = new QPushButton(tr("Select..."));
//Reduce the button size so that it's not higher than the line edit, and not much larger than its text
button->setMaximumHeight(_line->size().height()-5);
button->setMaximumWidth(button->fontMetrics().boundingRect(button->text()).width()+15);
layout->addWidget(button);
CONNECT(button, SIGNAL(clicked()), this, SLOT(clicked()));
//Create the file dialog and set its mode
_fileDialog = new QFileDialog(this,title,QDir::homePath());
_fileDialog->setFileMode(mode);
}