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https://github.com/transmission/transmission
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dadffa2c0f
This way all the qualifiers (`const`, `volatile`, `mutable`) are grouped together, e.g. `T const* const x` vs. `const T* const x`. Also helps reading types right-to-left, e.g. "constant pointer to constant T" vs. "constant pointer to T which is constant".
190 lines
4.3 KiB
C++
190 lines
4.3 KiB
C++
/*
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* This file Copyright (C) 2014-2015 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#include <QApplication>
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#include <QDir>
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#include <QFileDialog>
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#include <QFileIconProvider>
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#include <QFileInfo>
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#include <QStyle>
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#include <QStyleOptionToolButton>
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#include <QStylePainter>
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#include "PathButton.h"
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#include "Utils.h"
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PathButton::PathButton(QWidget* parent) :
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QToolButton(parent),
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myMode(DirectoryMode),
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myTitle(),
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myNameFilter(),
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myPath()
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{
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setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed));
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setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
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setText(tr("(None)")); // for minimum width
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updateAppearance();
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connect(this, SIGNAL(clicked()), this, SLOT(onClicked()));
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}
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void PathButton::setMode(Mode mode)
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{
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if (myMode == mode)
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{
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return;
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}
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myMode = mode;
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updateAppearance();
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}
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void PathButton::setTitle(QString const& title)
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{
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myTitle = title;
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}
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void PathButton::setNameFilter(QString const& nameFilter)
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{
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myNameFilter = nameFilter;
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}
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void PathButton::setPath(QString const& path)
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{
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if (myPath == path)
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{
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return;
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}
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myPath = QDir::toNativeSeparators(Utils::removeTrailingDirSeparator(path));
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updateAppearance();
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emit pathChanged(myPath);
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}
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QString const& PathButton::path() const
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{
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return myPath;
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}
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QSize PathButton::sizeHint() const
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{
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QSize const sh(QToolButton::sizeHint());
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return QSize(qMin(sh.width(), 150), sh.height());
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}
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void PathButton::paintEvent(QPaintEvent* /*event*/)
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{
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QStylePainter painter(this);
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QStyleOptionToolButton option;
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initStyleOption(&option);
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QSize const fakeContentSize(qMax(100, qApp->globalStrut().width()), qMax(100, qApp->globalStrut().height()));
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QSize const fakeSizeHint = style()->sizeFromContents(QStyle::CT_ToolButton, &option, fakeContentSize, this);
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int textWidth = width() - (fakeSizeHint.width() - fakeContentSize.width()) - iconSize().width() - 6;
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if (popupMode() == MenuButtonPopup)
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{
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textWidth -= style()->pixelMetric(QStyle::PM_MenuButtonIndicator, &option, this);
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}
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QFileInfo const pathInfo(myPath);
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option.text = myPath.isEmpty() ? tr("(None)") : (pathInfo.fileName().isEmpty() ? myPath : pathInfo.fileName());
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option.text = fontMetrics().elidedText(option.text, Qt::ElideMiddle, textWidth);
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painter.drawComplexControl(QStyle::CC_ToolButton, option);
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}
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void PathButton::onClicked()
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{
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QFileDialog* dialog = new QFileDialog(window(), effectiveTitle());
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dialog->setFileMode(isDirMode() ? QFileDialog::Directory : QFileDialog::ExistingFile);
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if (isDirMode())
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{
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dialog->setOption(QFileDialog::ShowDirsOnly);
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}
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if (!myNameFilter.isEmpty())
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{
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dialog->setNameFilter(myNameFilter);
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}
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QFileInfo const pathInfo(myPath);
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if (!myPath.isEmpty() && pathInfo.exists())
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{
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if (pathInfo.isDir())
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{
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dialog->setDirectory(pathInfo.absoluteFilePath());
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}
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else
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{
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dialog->setDirectory(pathInfo.absolutePath());
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dialog->selectFile(pathInfo.fileName());
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}
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}
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connect(dialog, SIGNAL(fileSelected(QString)), this, SLOT(onFileSelected(QString)));
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dialog->setAttribute(Qt::WA_DeleteOnClose);
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dialog->open();
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}
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void PathButton::onFileSelected(QString const& path)
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{
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if (!path.isEmpty())
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{
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setPath(path);
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}
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}
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void PathButton::updateAppearance()
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{
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QFileInfo const pathInfo(myPath);
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int const iconSize(style()->pixelMetric(QStyle::PM_SmallIconSize));
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QFileIconProvider const iconProvider;
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QIcon icon;
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if (!myPath.isEmpty() && pathInfo.exists())
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{
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icon = iconProvider.icon(myPath);
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}
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if (icon.isNull())
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{
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icon = iconProvider.icon(isDirMode() ? QFileIconProvider::Folder : QFileIconProvider::File);
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}
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setIconSize(QSize(iconSize, iconSize));
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setIcon(icon);
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setToolTip(myPath == text() ? QString() : myPath);
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update();
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}
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bool PathButton::isDirMode() const
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{
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return myMode == DirectoryMode;
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}
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QString PathButton::effectiveTitle() const
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{
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if (!myTitle.isEmpty())
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{
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return myTitle;
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}
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return isDirMode() ? tr("Select Folder") : tr("Select File");
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}
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