132 lines
4.3 KiB
C++
132 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 <algorithm>
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#include <QApplication>
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#include <QComboBox>
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#include <QPen>
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#include <QRect>
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#include <QStyle>
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#include <QStylePainter>
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#include "FilterBarComboBox.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 std::max(3, w->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing, nullptr, w));
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}
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} // namespace
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FilterBarComboBox::FilterBarComboBox(QWidget* parent)
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: QComboBox{ parent }
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{
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setSizeAdjustPolicy(QComboBox::AdjustToContents);
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}
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QSize FilterBarComboBox::minimumSizeHint() const
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{
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auto const fm = fontMetrics();
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auto const text_size = fm.size(0, itemText(0));
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auto const count_size = fm.size(0, itemData(0, CountStringRole).toString());
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return calculateSize(text_size, count_size);
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}
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QSize FilterBarComboBox::sizeHint() const
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{
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auto const fm = fontMetrics();
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auto max_text_size = QSize{ 0, 0 };
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auto max_count_size = QSize{ 0, 0 };
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for (int i = 0, n = count(); i < n; ++i)
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{
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auto const text_size = fm.size(0, itemText(i));
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max_text_size.setHeight(qMax(max_text_size.height(), text_size.height()));
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max_text_size.setWidth(qMax(max_text_size.width(), text_size.width()));
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auto const count_size = fm.size(0, itemData(i, CountStringRole).toString());
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max_count_size.setHeight(qMax(max_count_size.height(), count_size.height()));
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max_count_size.setWidth(qMax(max_count_size.width(), count_size.width()));
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}
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return calculateSize(max_text_size, max_count_size);
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}
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QSize FilterBarComboBox::calculateSize(QSize const& text_size, QSize const& count_size) const
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{
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int const hmargin = getHSpacing(this);
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QStyleOptionComboBox option;
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initStyleOption(&option);
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auto content_size = iconSize() + QSize{ 4, 2 };
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content_size.setHeight(qMax(content_size.height(), text_size.height()));
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content_size.rwidth() += hmargin + text_size.width();
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content_size.rwidth() += hmargin + count_size.width();
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return style()->sizeFromContents(QStyle::CT_ComboBox, &option, content_size, this);
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}
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void FilterBarComboBox::paintEvent(QPaintEvent* e)
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{
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Q_UNUSED(e)
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auto painter = QStylePainter{ this };
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painter.setPen(palette().color(QPalette::Text));
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// draw the combobox frame, focusrect and selected etc.
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QStyleOptionComboBox opt;
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initStyleOption(&opt);
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painter.drawComplexControl(QStyle::CC_ComboBox, opt);
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// draw the icon and text
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QModelIndex const model_index = model()->index(currentIndex(), 0, rootModelIndex());
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if (model_index.isValid())
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{
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auto const* const s = style();
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int const hmargin = getHSpacing(this);
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QRect rect = s->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
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rect.adjust(2, 1, -2, -1);
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// draw the icon
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if (auto const icon = Utils::getIconFromIndex(model_index); !icon.isNull())
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{
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auto const icon_rect = QStyle::alignedRect(opt.direction, Qt::AlignLeft | Qt::AlignVCenter, opt.iconSize, rect);
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icon.paint(&painter, icon_rect, Qt::AlignCenter, StyleHelper::getIconMode(opt.state), QIcon::Off);
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Utils::narrowRect(rect, icon_rect.width() + hmargin, 0, opt.direction);
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}
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// draw the count
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auto text = model_index.data(CountStringRole).toString();
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if (!text.isEmpty())
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{
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QPen const pen = painter.pen();
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painter.setPen(Utils::getFadedColor(pen.color()));
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QRect const text_rect = QStyle::alignedRect(
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opt.direction,
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Qt::AlignRight | Qt::AlignVCenter,
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QSize{ opt.fontMetrics.size(0, text).width(), rect.height() },
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rect);
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painter.drawText(text_rect, Qt::AlignRight | Qt::AlignVCenter, text);
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Utils::narrowRect(rect, 0, text_rect.width() + hmargin, opt.direction);
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painter.setPen(pen);
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}
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// draw the text
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text = model_index.data(Qt::DisplayRole).toString();
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text = painter.fontMetrics().elidedText(text, Qt::ElideRight, rect.width());
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painter.drawText(rect, Qt::AlignLeft | Qt::AlignVCenter, text);
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}
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}
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