transmission/qt/PathButton.cc

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/*
* This file Copyright (C) 2014-2015 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <QApplication>
#include <QDir>
#include <QFileDialog>
#include <QFileIconProvider>
#include <QFileInfo>
#include <QStyle>
#include <QStyleOptionToolButton>
#include <QStylePainter>
#include "PathButton.h"
#include "Utils.h"
PathButton::PathButton(QWidget* parent) :
QToolButton(parent),
myMode(DirectoryMode),
myTitle(),
myNameFilter(),
myPath()
{
setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed));
setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
setText(tr("(None)")); // for minimum width
updateAppearance();
connect(this, SIGNAL(clicked()), this, SLOT(onClicked()));
}
void PathButton::setMode(Mode mode)
{
if (myMode == mode)
{
return;
}
myMode = mode;
updateAppearance();
}
void PathButton::setTitle(QString const& title)
{
myTitle = title;
}
void PathButton::setNameFilter(QString const& nameFilter)
{
myNameFilter = nameFilter;
}
void PathButton::setPath(QString const& path)
{
if (myPath == path)
{
return;
}
myPath = QDir::toNativeSeparators(Utils::removeTrailingDirSeparator(path));
updateAppearance();
emit pathChanged(myPath);
}
QString const& PathButton::path() const
{
return myPath;
}
QSize PathButton::sizeHint() const
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{
QSize const sh(QToolButton::sizeHint());
return QSize(qMin(sh.width(), 150), sh.height());
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}
void PathButton::paintEvent(QPaintEvent* /*event*/)
{
QStylePainter painter(this);
QStyleOptionToolButton option;
initStyleOption(&option);
QSize const fakeContentSize(qMax(100, qApp->globalStrut().width()), qMax(100, qApp->globalStrut().height()));
QSize const fakeSizeHint = style()->sizeFromContents(QStyle::CT_ToolButton, &option, fakeContentSize, this);
int textWidth = width() - (fakeSizeHint.width() - fakeContentSize.width()) - iconSize().width() - 6;
if (popupMode() == MenuButtonPopup)
{
textWidth -= style()->pixelMetric(QStyle::PM_MenuButtonIndicator, &option, this);
}
QFileInfo const pathInfo(myPath);
option.text = myPath.isEmpty() ? tr("(None)") : (pathInfo.fileName().isEmpty() ? myPath : pathInfo.fileName());
option.text = fontMetrics().elidedText(option.text, Qt::ElideMiddle, textWidth);
painter.drawComplexControl(QStyle::CC_ToolButton, option);
}
void PathButton::onClicked()
{
QFileDialog* dialog = new QFileDialog(window(), effectiveTitle());
dialog->setFileMode(isDirMode() ? QFileDialog::Directory : QFileDialog::ExistingFile);
if (isDirMode())
{
dialog->setOption(QFileDialog::ShowDirsOnly);
}
if (!myNameFilter.isEmpty())
{
dialog->setNameFilter(myNameFilter);
}
QFileInfo const pathInfo(myPath);
if (!myPath.isEmpty() && pathInfo.exists())
{
if (pathInfo.isDir())
{
dialog->setDirectory(pathInfo.absoluteFilePath());
}
else
{
dialog->setDirectory(pathInfo.absolutePath());
dialog->selectFile(pathInfo.fileName());
}
}
connect(dialog, SIGNAL(fileSelected(QString)), this, SLOT(onFileSelected(QString)));
dialog->setAttribute(Qt::WA_DeleteOnClose);
dialog->open();
}
void PathButton::onFileSelected(QString const& path)
{
if (!path.isEmpty())
{
setPath(path);
}
}
void PathButton::updateAppearance()
{
QFileInfo const pathInfo(myPath);
int const iconSize(style()->pixelMetric(QStyle::PM_SmallIconSize));
QFileIconProvider const iconProvider;
QIcon icon;
if (!myPath.isEmpty() && pathInfo.exists())
{
icon = iconProvider.icon(myPath);
}
if (icon.isNull())
{
icon = iconProvider.icon(isDirMode() ? QFileIconProvider::Folder : QFileIconProvider::File);
}
setIconSize(QSize(iconSize, iconSize));
setIcon(icon);
setToolTip(myPath == text() ? QString() : myPath);
update();
}
bool PathButton::isDirMode() const
{
return myMode == DirectoryMode;
}
QString PathButton::effectiveTitle() const
{
if (!myTitle.isEmpty())
{
return myTitle;
}
return isDirMode() ? tr("Select Folder") : tr("Select File");
}