transmission/qt/FilterBarComboBox.cc

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/*
* 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 <QApplication>
#include <QStyle>
#include <QStylePainter>
#include "FilterBarComboBox.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
FilterBarComboBox::FilterBarComboBox(QWidget* parent) :
QComboBox(parent)
{
setSizeAdjustPolicy(QComboBox::AdjustToContents);
}
int FilterBarComboBox::currentCount() const
{
int count = 0;
QModelIndex const modelIndex = model()->index(currentIndex(), 0, rootModelIndex());
if (modelIndex.isValid())
{
count = modelIndex.data(CountRole).toInt();
}
return count;
}
QSize FilterBarComboBox::minimumSizeHint() const
{
QFontMetrics fm(fontMetrics());
QSize const textSize = fm.boundingRect(itemText(0)).size();
QSize const countSize = fm.boundingRect(itemData(0, CountStringRole).toString()).size();
return calculateSize(textSize, countSize);
}
QSize FilterBarComboBox::sizeHint() const
{
QFontMetrics fm(fontMetrics());
QSize maxTextSize(0, 0);
QSize maxCountSize(0, 0);
for (int i = 0, n = count(); i < n; ++i)
{
QSize const textSize = fm.boundingRect(itemText(i)).size();
maxTextSize.setHeight(qMax(maxTextSize.height(), textSize.height()));
maxTextSize.setWidth(qMax(maxTextSize.width(), textSize.width()));
QSize const countSize = fm.boundingRect(itemData(i, CountStringRole).toString()).size();
maxCountSize.setHeight(qMax(maxCountSize.height(), countSize.height()));
maxCountSize.setWidth(qMax(maxCountSize.width(), countSize.width()));
}
return calculateSize(maxTextSize, maxCountSize);
}
QSize FilterBarComboBox::calculateSize(QSize const& textSize, QSize const& countSize) const
{
int const hmargin = getHSpacing(this);
QStyleOptionComboBox option;
initStyleOption(&option);
QSize contentSize = iconSize() + QSize(4, 2);
contentSize.setHeight(qMax(contentSize.height(), textSize.height()));
contentSize.rwidth() += hmargin + textSize.width();
contentSize.rwidth() += hmargin + countSize.width();
return style()->sizeFromContents(QStyle::CT_ComboBox, &option, contentSize, this).expandedTo(qApp->globalStrut());
}
void FilterBarComboBox::paintEvent(QPaintEvent* e)
{
Q_UNUSED(e);
QStylePainter painter(this);
painter.setPen(palette().color(QPalette::Text));
// draw the combobox frame, focusrect and selected etc.
QStyleOptionComboBox opt;
initStyleOption(&opt);
painter.drawComplexControl(QStyle::CC_ComboBox, opt);
// draw the icon and text
QModelIndex const modelIndex = model()->index(currentIndex(), 0, rootModelIndex());
if (modelIndex.isValid())
{
QStyle* s = style();
int const hmargin = getHSpacing(this);
QRect rect = s->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
rect.adjust(2, 1, -2, -1);
// draw the icon
QIcon const icon = Utils::getIconFromIndex(modelIndex);
if (!icon.isNull())
{
QRect const iconRect = QStyle::alignedRect(opt.direction, Qt::AlignLeft | Qt::AlignVCenter, opt.iconSize, rect);
icon.paint(&painter, iconRect, Qt::AlignCenter, StyleHelper::getIconMode(opt.state), QIcon::Off);
Utils::narrowRect(rect, iconRect.width() + hmargin, 0, opt.direction);
}
// draw the count
QString text = modelIndex.data(CountStringRole).toString();
if (!text.isEmpty())
{
QPen const pen = painter.pen();
painter.setPen(Utils::getFadedColor(pen.color()));
QRect const textRect = QStyle::alignedRect(opt.direction, Qt::AlignRight | Qt::AlignVCenter,
QSize(opt.fontMetrics.width(text), rect.height()), rect);
painter.drawText(textRect, Qt::AlignRight | Qt::AlignVCenter, text);
Utils::narrowRect(rect, 0, textRect.width() + hmargin, opt.direction);
painter.setPen(pen);
}
// draw the text
text = modelIndex.data(Qt::DisplayRole).toString();
text = painter.fontMetrics().elidedText(text, Qt::ElideRight, rect.width());
painter.drawText(rect, Qt::AlignLeft | Qt::AlignVCenter, text);
}
}