transmission/qt/FilterBarComboBox.cc

148 lines
4.7 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.
*
* $Id$
*/
#include <QApplication>
#include <QStyle>
#include <QStylePainter>
#include "FilterBarComboBox.h"
#include "Utils.h"
namespace
{
int
getHSpacing (const QWidget * w)
{
return qMax (3, w->style ()->pixelMetric (QStyle::PM_LayoutHorizontalSpacing, 0, w));
}
}
FilterBarComboBox::FilterBarComboBox (QWidget * parent):
QComboBox (parent)
{
setSizeAdjustPolicy (QComboBox::AdjustToContents);
}
int
FilterBarComboBox::currentCount () const
{
int count = 0;
const QModelIndex modelIndex = model ()->index (currentIndex (), 0, rootModelIndex ());
if (modelIndex.isValid ())
count = modelIndex.data (CountRole).toInt ();
return count;
}
QSize
FilterBarComboBox::minimumSizeHint () const
{
QFontMetrics fm (fontMetrics ());
const QSize textSize = fm.boundingRect (itemText (0)).size ();
const QSize 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)
{
const QSize textSize = fm.boundingRect (itemText (i)).size ();
maxTextSize.setHeight (qMax (maxTextSize.height (), textSize.height ()));
maxTextSize.setWidth (qMax (maxTextSize.width (), textSize.width ()));
const QSize 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 (const QSize& textSize, const QSize& countSize) const
{
const int 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
const QModelIndex modelIndex = model ()->index (currentIndex (), 0, rootModelIndex ());
if (modelIndex.isValid ())
{
QStyle * s = style ();
const int hmargin = getHSpacing (this);
QRect rect = s->subControlRect (QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
rect.adjust (2, 1, -2, -1);
// draw the icon
QPixmap pixmap;
QVariant variant = modelIndex.data (Qt::DecorationRole);
switch (variant.type ())
{
case QVariant::Pixmap: pixmap = qvariant_cast<QPixmap> (variant); break;
case QVariant::Icon: pixmap = qvariant_cast<QIcon> (variant).pixmap (iconSize ()); break;
default: break;
}
if (!pixmap.isNull ())
{
const QRect iconRect = QStyle::alignedRect(opt.direction, Qt::AlignLeft | Qt::AlignVCenter,
opt.iconSize, rect);
painter.drawPixmap (iconRect.topLeft (), pixmap);
Utils::narrowRect (rect, iconRect.width () + hmargin, 0, opt.direction);
}
// draw the count
QString text = modelIndex.data (CountStringRole).toString ();
if (!text.isEmpty ())
{
const QPen pen = painter.pen ();
painter.setPen (Utils::getFadedColor (pen.color ()));
const QRect 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);
}
}