223 lines
8.1 KiB
C++
223 lines
8.1 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2014 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "combobox.h"
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#include "lineedit.h"
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#include "utils.h"
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#include <QAbstractItemView>
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#include <QStyle>
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#include <QStyleOption>
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#include <QStyledItemDelegate>
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#include <QDesktopWidget>
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#include <QApplication>
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#include <QPainter>
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#include "gtkstyle.h"
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// Max number of items before we try to force a scrollbar in popup menu...
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static int maxPopupItemCount=-1;
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class ComboItemDelegate : public QStyledItemDelegate
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{
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public:
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ComboItemDelegate(ComboBox *p) : QStyledItemDelegate(p), mCombo(p) { }
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virtual ~ComboItemDelegate() { }
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QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QSize sz=QStyledItemDelegate::sizeHint(option, index);
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int minH=option.fontMetrics.height()*2;
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if (sz.height()<minH) {
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sz.setHeight(minH);
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}
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return sz;
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}
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void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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if (GtkStyle::isActive()) {
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QStyleOptionMenuItem opt = getStyleOption(option, index);
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painter->fillRect(option.rect, opt.palette.background());
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mCombo->style()->drawControl(QStyle::CE_MenuItem, &opt, painter, mCombo);
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} else {
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QStyledItemDelegate::paint(painter, option, index);
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}
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}
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static bool isSeparator(const QModelIndex &index)
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{
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return index.data(Qt::AccessibleDescriptionRole).toString() == QLatin1String("separator");
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}
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QStyleOptionMenuItem getStyleOption(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QStyleOptionMenuItem menuOption;
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QPalette resolvedpalette = option.palette.resolve(QApplication::palette("QMenu"));
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QVariant value = index.data(Qt::ForegroundRole);
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if (value.canConvert<QBrush>()) {
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resolvedpalette.setBrush(QPalette::WindowText, qvariant_cast<QBrush>(value));
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resolvedpalette.setBrush(QPalette::ButtonText, qvariant_cast<QBrush>(value));
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resolvedpalette.setBrush(QPalette::Text, qvariant_cast<QBrush>(value));
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}
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menuOption.palette = resolvedpalette;
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menuOption.state = QStyle::State_None;
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if (mCombo->window()->isActiveWindow()) {
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menuOption.state = QStyle::State_Active;
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}
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if ((option.state & QStyle::State_Enabled) && (index.model()->flags(index) & Qt::ItemIsEnabled)) {
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menuOption.state |= QStyle::State_Enabled;
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} else {
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menuOption.palette.setCurrentColorGroup(QPalette::Disabled);
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}
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if (option.state & QStyle::State_Selected) {
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menuOption.state |= QStyle::State_Selected;
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}
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menuOption.checkType = QStyleOptionMenuItem::NonExclusive;
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menuOption.checked = mCombo->currentIndex() == index.row();
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if (isSeparator(index)) {
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menuOption.menuItemType = QStyleOptionMenuItem::Separator;
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} else {
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menuOption.menuItemType = QStyleOptionMenuItem::Normal;
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}
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QVariant variant = index.model()->data(index, Qt::DecorationRole);
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switch (variant.type()) {
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case QVariant::Icon:
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menuOption.icon = qvariant_cast<QIcon>(variant);
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break;
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case QVariant::Color: {
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static QPixmap pixmap(option.decorationSize);
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pixmap.fill(qvariant_cast<QColor>(variant));
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menuOption.icon = pixmap;
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break;
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}
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default:
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menuOption.icon = qvariant_cast<QPixmap>(variant);
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break;
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}
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if (index.data(Qt::BackgroundRole).canConvert<QBrush>()) {
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menuOption.palette.setBrush(QPalette::All, QPalette::Background,
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qvariant_cast<QBrush>(index.data(Qt::BackgroundRole)));
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}
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menuOption.text = index.model()->data(index, Qt::DisplayRole).toString()
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.replace(QLatin1Char('&'), QLatin1String("&&"));
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menuOption.tabWidth = 0;
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menuOption.maxIconWidth = option.decorationSize.width() + 4;
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menuOption.menuRect = option.rect;
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menuOption.rect = option.rect;
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menuOption.font = mCombo->font();
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menuOption.fontMetrics = QFontMetrics(menuOption.font);
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return menuOption;
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}
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ComboBox *mCombo;
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};
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ComboBox::ComboBox(QWidget *p)
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#ifdef ENABLE_KDE_SUPPORT
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: KComboBox(p)
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#else
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: QComboBox(p)
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#endif
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, toggleState(false)
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{
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if (-1==maxPopupItemCount) {
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if (QApplication::desktop()) {
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maxPopupItemCount=((QApplication::desktop()->height()/(QApplication::fontMetrics().height()*1.5))*0.75)+0.5;
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} else {
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maxPopupItemCount=32;
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}
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}
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if (Utils::touchFriendly()) {
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setItemDelegate(new ComboItemDelegate(this));
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}
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}
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void ComboBox::setEditable(bool editable)
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{
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QComboBox::setEditable(editable);
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if (editable) {
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LineEdit *edit = new LineEdit(this);
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setLineEdit(edit);
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}
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}
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void ComboBox::showPopup()
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{
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if (GtkStyle::isActive() && count()>(maxPopupItemCount-2)) {
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toggleState=!isEditable();
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// Hacky, but if we set the combobox as editable - the style gives the
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// popup a scrollbar. This is more convenient if we have lots of items!
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if (toggleState) {
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setMaxVisibleItems(maxPopupItemCount);
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QComboBox::setEditable(true);
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lineEdit()->setReadOnly(true);
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}
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}
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QComboBox::showPopup();
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if (Utils::touchFriendly()) {
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view()->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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view()->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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}
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if (GtkStyle::isActive() && parentWidget() && view()->parentWidget() && count()>maxPopupItemCount) {
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// Also, if the size of the popup is more than required for 32 items, then
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// restrict its height...
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int maxHeight=maxPopupItemCount*view()->sizeHintForRow(0);
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QRect geo(view()->parentWidget()->geometry());
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QRect r(view()->parentWidget()->rect());
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if (geo.height()>maxHeight) {
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geo=QRect(geo.x(), geo.y()+(geo.height()-maxHeight), geo.width(), maxHeight);
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r=QRect(r.x(), r.y()+(r.height()-maxHeight), r.width(), maxHeight);
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}
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QPoint popupBot=view()->parentWidget()->mapToGlobal(r.bottomLeft());
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QPoint bot=mapToGlobal(rect().bottomLeft());
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if (popupBot.y()<bot.y()) {
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geo=QRect(geo.x(), geo.y()+(bot.y()-popupBot.y()), geo.width(), geo.height());
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} else {
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QPoint popupTop=view()->parentWidget()->mapToGlobal(r.topLeft());
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QPoint top=mapToGlobal(rect().topLeft());
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if (popupTop.y()>top.y()) {
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geo=QRect(geo.x(), geo.y()-(popupTop.y()-top.y()), geo.width(), geo.height());
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}
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}
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view()->parentWidget()->setGeometry(geo);
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#ifndef ENABLE_KDE_SUPPORT
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// Hide scrollers - these look ugly...
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foreach (QObject *c, view()->parentWidget()->children()) {
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if (0==qstrcmp("QComboBoxPrivateScroller", c->metaObject()->className())) {
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static_cast<QWidget *>(c)->setMaximumHeight(0);
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}
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}
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#endif
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}
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}
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void ComboBox::hidePopup()
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{
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if (GtkStyle::isActive() && count()>(maxPopupItemCount-2) && toggleState) {
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QComboBox::setEditable(false);
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}
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QComboBox::hidePopup();
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}
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