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.
*
* $Id$
*/
#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 (const QString& title)
{
myTitle = title;
}
void
PathButton::setNameFilter (const QString& nameFilter)
{
myNameFilter = nameFilter;
}
void
PathButton::setPath (const QString& path)
{
if (myPath == path)
return;
myPath = QDir::toNativeSeparators (Utils::removeTrailingDirSeparator (path));
updateAppearance ();
emit pathChanged (myPath);
}
const QString&
PathButton::path () const
{
return myPath;
}
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QSize
PathButton::sizeHint () const
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{
const QSize sh (QToolButton::sizeHint ());
return QSize (qMin (sh.width (), 150), sh.height ());
}
void
PathButton::paintEvent (QPaintEvent * /*event*/)
{
QStylePainter painter(this);
QStyleOptionToolButton option;
initStyleOption (&option);
const QSize fakeContentSize (qMax (100, qApp->globalStrut ().width ()),
qMax (100, qApp->globalStrut ().height ()));
const QSize 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);
const QFileInfo 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);
const QFileInfo 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 (const QString& path)
{
if (!path.isEmpty ())
setPath (path);
}
void
PathButton::updateAppearance ()
{
const QFileInfo pathInfo (myPath);
const int iconSize (style ()->pixelMetric (QStyle::PM_SmallIconSize));
const QFileIconProvider 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");
}