transmission/qt/FilterBarComboBoxDelegate.cc

122 lines
4.2 KiB
C++

/*
* This file Copyright (C) 2012-2015 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <QAbstractItemView>
#include <QComboBox>
#include <QStandardItemModel>
#include <QStyle>
#include "FilterBarComboBox.h"
#include "FilterBarComboBoxDelegate.h"
#include "StyleHelper.h"
#include "Utils.h"
namespace
{
int getHSpacing(QWidget const* w)
{
return qMax(3, w->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing, nullptr, w));
}
} // namespace
FilterBarComboBoxDelegate::FilterBarComboBoxDelegate(QObject* parent, QComboBox* combo) :
QItemDelegate(parent),
myCombo(combo)
{
}
bool FilterBarComboBoxDelegate::isSeparator(QModelIndex const& index)
{
return index.data(Qt::AccessibleDescriptionRole).toString() == QLatin1String("separator");
}
void FilterBarComboBoxDelegate::setSeparator(QAbstractItemModel* model, QModelIndex const& index)
{
model->setData(index, QString::fromLatin1("separator"), Qt::AccessibleDescriptionRole);
if (QStandardItemModel* m = qobject_cast<QStandardItemModel*>(model))
{
if (QStandardItem* item = m->itemFromIndex(index))
{
item->setFlags(item->flags() & ~(Qt::ItemIsSelectable | Qt::ItemIsEnabled));
}
}
}
void FilterBarComboBoxDelegate::paint(QPainter* painter, QStyleOptionViewItem const& option, QModelIndex const& index) const
{
if (isSeparator(index))
{
QRect rect = option.rect;
if (QAbstractItemView const* view = qobject_cast<QAbstractItemView const*>(option.widget))
{
rect.setWidth(view->viewport()->width());
}
QStyleOption opt;
opt.rect = rect;
myCombo->style()->drawPrimitive(QStyle::PE_IndicatorToolBarSeparator, &opt, painter, myCombo);
}
else
{
QStyleOptionViewItem disabledOption = option;
QPalette::ColorRole const disabledColorRole = (disabledOption.state & QStyle::State_Selected) != 0 ?
QPalette::HighlightedText : QPalette::Text;
disabledOption.palette.setColor(disabledColorRole, Utils::getFadedColor(disabledOption.palette.color(
disabledColorRole)));
QRect boundingBox = option.rect;
int const hmargin = getHSpacing(myCombo);
boundingBox.adjust(hmargin, 0, -hmargin, 0);
QRect decorationRect = rect(option, index, Qt::DecorationRole);
decorationRect.setSize(myCombo->iconSize());
decorationRect = QStyle::alignedRect(option.direction, Qt::AlignLeft | Qt::AlignVCenter, decorationRect.size(),
boundingBox);
Utils::narrowRect(boundingBox, decorationRect.width() + hmargin, 0, option.direction);
QRect countRect = rect(option, index, FilterBarComboBox::CountStringRole);
countRect = QStyle::alignedRect(option.direction, Qt::AlignRight | Qt::AlignVCenter, countRect.size(), boundingBox);
Utils::narrowRect(boundingBox, 0, countRect.width() + hmargin, option.direction);
QRect const displayRect = boundingBox;
QIcon const icon = Utils::getIconFromIndex(index);
drawBackground(painter, option, index);
icon.paint(painter, decorationRect, Qt::AlignCenter, StyleHelper::getIconMode(option.state), QIcon::Off);
drawDisplay(painter, option, displayRect, index.data(Qt::DisplayRole).toString());
drawDisplay(painter, disabledOption, countRect, index.data(FilterBarComboBox::CountStringRole).toString());
drawFocus(painter, option, displayRect | countRect);
}
}
QSize FilterBarComboBoxDelegate::sizeHint(QStyleOptionViewItem const& option, QModelIndex const& index) const
{
if (isSeparator(index))
{
int const pm = myCombo->style()->pixelMetric(QStyle::PM_DefaultFrameWidth, nullptr, myCombo);
return QSize(pm, pm + 10);
}
else
{
QStyle* s = myCombo->style();
int const hmargin = getHSpacing(myCombo);
QSize size = QItemDelegate::sizeHint(option, index);
size.setHeight(qMax(size.height(), myCombo->iconSize().height() + 6));
size.rwidth() += s->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr, myCombo);
size.rwidth() += rect(option, index, FilterBarComboBox::CountStringRole).width();
size.rwidth() += hmargin * 4;
return size;
}
}