122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
// This file Copyright © Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#include <QAbstractItemView>
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#include <QComboBox>
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#include <QStandardItemModel>
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#include <QStyle>
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#include "FilterBarComboBox.h"
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#include "FilterBarComboBoxDelegate.h"
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#include "StyleHelper.h"
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#include "Utils.h"
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namespace
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{
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int getHSpacing(QWidget const* w)
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{
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return qMax(3, w->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing, nullptr, w));
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}
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} // namespace
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FilterBarComboBoxDelegate::FilterBarComboBoxDelegate(QObject* parent, QComboBox* combo)
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: QItemDelegate{ parent }
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, combo_{ combo }
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{
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}
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bool FilterBarComboBoxDelegate::isSeparator(QModelIndex const& index)
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{
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return index.data(Qt::AccessibleDescriptionRole).toString() == QStringLiteral("separator");
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}
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void FilterBarComboBoxDelegate::setSeparator(QAbstractItemModel* model, QModelIndex const& index)
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{
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model->setData(index, QStringLiteral("separator"), Qt::AccessibleDescriptionRole);
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if (auto const* const m = qobject_cast<QStandardItemModel*>(model))
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{
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if (QStandardItem* item = m->itemFromIndex(index))
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{
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item->setFlags(item->flags() & ~(Qt::ItemIsSelectable | Qt::ItemIsEnabled));
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}
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}
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}
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void FilterBarComboBoxDelegate::paint(QPainter* painter, QStyleOptionViewItem const& option, QModelIndex const& index) const
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{
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if (isSeparator(index))
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{
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QRect rect = option.rect;
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if (auto const* view = qobject_cast<QAbstractItemView const*>(option.widget))
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{
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rect.setWidth(view->viewport()->width());
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}
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QStyleOption opt;
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opt.rect = rect;
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combo_->style()->drawPrimitive(QStyle::PE_IndicatorToolBarSeparator, &opt, painter, combo_);
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}
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else
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{
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QStyleOptionViewItem disabled_option = option;
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QPalette::ColorRole const disabled_color_role = (disabled_option.state & QStyle::State_Selected) != 0 ?
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QPalette::HighlightedText :
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QPalette::Text;
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disabled_option.palette.setColor(
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disabled_color_role,
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Utils::getFadedColor(disabled_option.palette.color(disabled_color_role)));
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QRect bounding_box = option.rect;
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int const hmargin = getHSpacing(combo_);
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bounding_box.adjust(hmargin, 0, -hmargin, 0);
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QRect decoration_rect = rect(option, index, Qt::DecorationRole);
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decoration_rect.setSize(combo_->iconSize());
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decoration_rect = QStyle::alignedRect(
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option.direction,
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Qt::AlignLeft | Qt::AlignVCenter,
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decoration_rect.size(),
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bounding_box);
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Utils::narrowRect(bounding_box, decoration_rect.width() + hmargin, 0, option.direction);
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QRect count_rect = rect(option, index, FilterBarComboBox::CountStringRole);
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count_rect = QStyle::alignedRect(option.direction, Qt::AlignRight | Qt::AlignVCenter, count_rect.size(), bounding_box);
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Utils::narrowRect(bounding_box, 0, count_rect.width() + hmargin, option.direction);
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QRect const display_rect = bounding_box;
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QIcon const icon = Utils::getIconFromIndex(index);
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drawBackground(painter, option, index);
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icon.paint(painter, decoration_rect, Qt::AlignCenter, StyleHelper::getIconMode(option.state), QIcon::Off);
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drawDisplay(painter, option, display_rect, index.data(Qt::DisplayRole).toString());
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drawDisplay(painter, disabled_option, count_rect, index.data(FilterBarComboBox::CountStringRole).toString());
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drawFocus(painter, option, display_rect | count_rect);
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}
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}
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QSize FilterBarComboBoxDelegate::sizeHint(QStyleOptionViewItem const& option, QModelIndex const& index) const
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{
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if (isSeparator(index))
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{
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int const pm = combo_->style()->pixelMetric(QStyle::PM_DefaultFrameWidth, nullptr, combo_);
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return { pm, pm + 10 };
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}
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QStyle const* const s = combo_->style();
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int const hmargin = getHSpacing(combo_);
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QSize size = QItemDelegate::sizeHint(option, index);
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size.setHeight(qMax(size.height(), combo_->iconSize().height() + 6));
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size.rwidth() += s->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr, combo_);
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size.rwidth() += rect(option, index, FilterBarComboBox::CountStringRole).width();
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size.rwidth() += hmargin * 4;
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return size;
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}
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