--- /dev/null
+/**
+ * \file qt4/CategorizedCombo.cpp
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * \author Lars Gullik Bjønnes
+ * \author John Levon
+ * \author Jean-Marc Lasgouttes
+ * \author Angus Leeming
+ * \author Stefan Schimanski
+ * \author Jürgen Spitzmüller
+ * \author Abdelrazak Younes
+ *
+ * Full author contact details are available in file CREDITS.
+ */
+
+#include <config.h>
+
+#include "CategorizedCombo.h"
+
+#include "qt_helpers.h"
+
+#include "support/debug.h"
+#include "support/gettext.h"
+#include "support/lassert.h"
+#include "support/lstrings.h"
+
+#include <QAbstractTextDocumentLayout>
+#include <QComboBox>
+#include <QHeaderView>
+#include <QItemDelegate>
+#include <QPainter>
+#include <QSortFilterProxyModel>
+#include <QStandardItemModel>
+#include <QTextFrame>
+
+using namespace std;
+using namespace lyx;
+using namespace lyx::support;
+
+
+class CCItemDelegate : public QItemDelegate {
+public:
+ ///
+ explicit CCItemDelegate(CategorizedCombo * cc)
+ : QItemDelegate(cc), cc_(cc)
+ {}
+ ///
+ void paint(QPainter * painter, QStyleOptionViewItem const & option,
+ QModelIndex const & index) const;
+ ///
+ void drawDisplay(QPainter * painter, QStyleOptionViewItem const & opt,
+ const QRect & /*rect*/, const QString & text ) const;
+ ///
+ QSize sizeHint(QStyleOptionViewItem const & opt,
+ QModelIndex const & index) const;
+
+private:
+ ///
+ void drawCategoryHeader(QPainter * painter, QStyleOptionViewItem const & opt,
+ QString const & category) const;
+ ///
+ QString underlineFilter(QString const & s) const;
+ ///
+ CategorizedCombo * cc_;
+};
+
+
+class CCFilterModel : public QSortFilterProxyModel {
+public:
+ ///
+ CCFilterModel(QObject * parent = 0)
+ : QSortFilterProxyModel(parent)
+ {}
+};
+
+
+/////////////////////////////////////////////////////////////////////
+//
+// CategorizedCombo::Private
+//
+/////////////////////////////////////////////////////////////////////
+
+struct CategorizedCombo::Private
+{
+ Private(CategorizedCombo * parent) : p(parent),
+ // set the model with four columns
+ // 1st: translated item names
+ // 2nd: raw names
+ // 3rd: category
+ // 4th: availability (bool)
+ model_(new QStandardItemModel(0, 4, p)),
+ filterModel_(new CCFilterModel(p)),
+ lastSel_(-1),
+ CCItemDelegate_(new CCItemDelegate(parent)),
+ visibleCategories_(0), inShowPopup_(false)
+ {
+ filterModel_->setSourceModel(model_);
+ }
+
+ void resetFilter() { setFilter(QString()); }
+ ///
+ void setFilter(QString const & s);
+ ///
+ void countCategories();
+ ///
+ CategorizedCombo * p;
+
+ /** the layout model:
+ * 1st column: translated GUI name,
+ * 2nd column: raw item name,
+ * 3rd column: category,
+ * 4th column: availability
+ **/
+ QStandardItemModel * model_;
+ /// the proxy model filtering \c model_
+ CCFilterModel * filterModel_;
+ /// the (model-) index of the last successful selection
+ int lastSel_;
+ /// the character filter
+ QString filter_;
+ ///
+ CCItemDelegate * CCItemDelegate_;
+ ///
+ unsigned visibleCategories_;
+ ///
+ bool inShowPopup_;
+};
+
+
+static QString category(QAbstractItemModel const & model, int row)
+{
+ return model.data(model.index(row, 2), Qt::DisplayRole).toString();
+}
+
+
+static int headerHeight(QStyleOptionViewItem const & opt)
+{
+ return opt.fontMetrics.height();
+}
+
+
+void CCItemDelegate::paint(QPainter * painter, QStyleOptionViewItem const & option,
+ QModelIndex const & index) const
+{
+ QStyleOptionViewItem opt = option;
+
+ // default background
+ painter->fillRect(opt.rect, opt.palette.color(QPalette::Base));
+
+ QString cat = category(*index.model(), index.row());
+
+ // not the same as in the previous line?
+ if (index.row() == 0 || cat != category(*index.model(), index.row() - 1)) {
+ painter->save();
+
+ // draw unselected background
+ QStyle::State state = opt.state;
+ opt.state = opt.state & ~QStyle::State_Selected;
+ drawBackground(painter, opt, index);
+ opt.state = state;
+
+ // draw category header
+ drawCategoryHeader(painter, opt,
+ category(*index.model(), index.row()));
+
+ // move rect down below header
+ opt.rect.setTop(opt.rect.top() + headerHeight(opt));
+
+ painter->restore();
+ }
+
+ QItemDelegate::paint(painter, opt, index);
+}
+
+
+void CCItemDelegate::drawDisplay(QPainter * painter, QStyleOptionViewItem const & opt,
+ const QRect & /*rect*/, const QString & text) const
+{
+ QString utext = underlineFilter(text);
+
+ // Draw the rich text.
+ painter->save();
+ QColor col = opt.palette.text().color();
+ // grey out unavailable items
+ if (text.startsWith(qt_("Unavailable:")))
+ col = opt.palette.color(QPalette::Disabled, QPalette::Text);
+ if (opt.state & QStyle::State_Selected)
+ col = opt.palette.highlightedText().color();
+ QAbstractTextDocumentLayout::PaintContext context;
+ context.palette.setColor(QPalette::Text, col);
+
+ QTextDocument doc;
+ doc.setDefaultFont(opt.font);
+ doc.setHtml(utext);
+
+ QTextFrameFormat fmt = doc.rootFrame()->frameFormat();
+ fmt.setMargin(0);
+ doc.rootFrame()->setFrameFormat(fmt);
+
+ painter->translate(opt.rect.x() + 5,
+ opt.rect.y() + (opt.rect.height() - opt.fontMetrics.height()) / 2);
+ doc.documentLayout()->draw(painter, context);
+ painter->restore();
+}
+
+
+QSize CCItemDelegate::sizeHint(QStyleOptionViewItem const & opt,
+ QModelIndex const & index) const
+{
+ QSize size = QItemDelegate::sizeHint(opt, index);
+
+ /// QComboBox uses the first row height to estimate the
+ /// complete popup height during QComboBox::showPopup().
+ /// To avoid scrolling we have to sneak in space for the headers.
+ /// So we tweak this value accordingly. It's not nice, but the
+ /// only possible way it seems.
+ // Add space for the category headers here
+ QString cat = category(*index.model(), index.row());
+ if (index.row() == 0 || cat != category(*index.model(), index.row() - 1)) {
+ size.setHeight(size.height() + headerHeight(opt));
+ }
+
+ return size;
+}
+
+
+void CCItemDelegate::drawCategoryHeader(QPainter * painter, QStyleOptionViewItem const & opt,
+ QString const & category) const
+{
+ // slightly blended color
+ QColor lcol = opt.palette.text().color();
+ lcol.setAlpha(127);
+ painter->setPen(lcol);
+
+ // set 80% scaled, bold font
+ QFont font = opt.font;
+ font.setBold(true);
+ font.setWeight(QFont::Black);
+ font.setPointSize(opt.font.pointSize() * 8 / 10);
+ painter->setFont(font);
+
+ // draw the centered text
+ QFontMetrics fm(font);
+ int w = fm.width(category);
+ int x = opt.rect.x() + (opt.rect.width() - w) / 2;
+ int y = opt.rect.y() + 1.5 * fm.ascent();
+ int left = x;
+ int right = x + w;
+ painter->drawText(x, y, category);
+
+ // the vertical position of the line: middle of lower case chars
+ int ymid = y - 1 - fm.xHeight() / 2; // -1 for the baseline
+
+ // draw the horizontal line
+ if (!category.isEmpty()) {
+ painter->drawLine(opt.rect.x(), ymid, left - 1, ymid);
+ painter->drawLine(right + 1, ymid, opt.rect.right(), ymid);
+ } else
+ painter->drawLine(opt.rect.x(), ymid, opt.rect.right(), ymid);
+}
+
+
+QString CCItemDelegate::underlineFilter(QString const & s) const
+{
+ QString const & f = cc_->filter();
+ if (f.isEmpty())
+ return s;
+
+ // step through data item and put "(x)" for every matching character
+ QString r;
+ int lastp = -1;
+ cc_->filter();
+ for (int i = 0; i < f.length(); ++i) {
+ int p = s.indexOf(f[i], lastp + 1, Qt::CaseInsensitive);
+ LASSERT(p != -1, /**/);
+ if (lastp == p - 1 && lastp != -1) {
+ // remove ")" and append "x)"
+ r = r.left(r.length() - 4) + s[p] + "</u>";
+ } else {
+ // append "(x)"
+ r += s.mid(lastp + 1, p - lastp - 1);
+ r += QString("<u>") + s[p] + "</u>";
+ }
+ lastp = p;
+ }
+ r += s.mid(lastp + 1);
+ return r;
+}
+
+
+static QString charFilterRegExp(QString const & filter)
+{
+ QString re;
+ for (int i = 0; i < filter.length(); ++i) {
+ QChar c = filter[i];
+ if (c.isLower())
+ re += ".*[" + QRegExp::escape(c) + QRegExp::escape(c.toUpper()) + "]";
+ else
+ re += ".*" + QRegExp::escape(c);
+ }
+ return re;
+}
+
+
+void CategorizedCombo::Private::setFilter(QString const & s)
+{
+ bool enabled = p->view()->updatesEnabled();
+ p->view()->setUpdatesEnabled(false);
+
+ // remember old selection
+ int sel = p->currentIndex();
+ if (sel != -1)
+ lastSel_ = filterModel_->mapToSource(filterModel_->index(sel, 0)).row();
+
+ filter_ = s;
+ filterModel_->setFilterRegExp(charFilterRegExp(filter_));
+ countCategories();
+
+ // restore old selection
+ if (lastSel_ != -1) {
+ QModelIndex i = filterModel_->mapFromSource(model_->index(lastSel_, 0));
+ if (i.isValid())
+ p->setCurrentIndex(i.row());
+ }
+
+ // Workaround to resize to content size
+ // FIXME: There must be a better way. The QComboBox::AdjustToContents)
+ // does not help.
+ if (p->view()->isVisible()) {
+ // call QComboBox::showPopup. But set the inShowPopup_ flag to switch on
+ // the hack in the item delegate to make space for the headers.
+ // We do not call our implementation of showPopup because that
+ // would reset the filter again. This is only needed if the user clicks
+ // on the QComboBox.
+ LASSERT(!inShowPopup_, /**/);
+ inShowPopup_ = true;
+ p->QComboBox::showPopup();
+ inShowPopup_ = false;
+ }
+
+ p->view()->setUpdatesEnabled(enabled);
+}
+
+
+CategorizedCombo::CategorizedCombo(QWidget * parent)
+ : QComboBox(parent), d(new Private(this))
+{
+ setSizeAdjustPolicy(QComboBox::AdjustToContents);
+ setFocusPolicy(Qt::ClickFocus);
+ setMinimumWidth(sizeHint().width());
+ setMaxVisibleItems(100);
+
+ setModel(d->filterModel_);
+
+ // for the filtering we have to intercept characters
+ view()->installEventFilter(this);
+ view()->setItemDelegateForColumn(0, d->CCItemDelegate_);
+
+ updateCombo();
+}
+
+
+CategorizedCombo::~CategorizedCombo() {
+ delete d;
+}
+
+
+void CategorizedCombo::Private::countCategories()
+{
+ int n = filterModel_->rowCount();
+ visibleCategories_ = 0;
+ if (n == 0)
+ return;
+
+ QString prevCat = model_->index(0, 2).data().toString();
+
+ // count categories
+ for (int i = 1; i < n; ++i) {
+ QString cat = filterModel_->index(i, 2).data().toString();
+ if (cat != prevCat)
+ ++visibleCategories_;
+ prevCat = cat;
+ }
+}
+
+
+void CategorizedCombo::showPopup()
+{
+ bool enabled = view()->updatesEnabled();
+ view()->setUpdatesEnabled(false);
+
+ d->resetFilter();
+
+ // call QComboBox::showPopup. But set the inShowPopup_ flag to switch on
+ // the hack in the item delegate to make space for the headers.
+ LASSERT(!d->inShowPopup_, /**/);
+ d->inShowPopup_ = true;
+ QComboBox::showPopup();
+ d->inShowPopup_ = false;
+
+ view()->setUpdatesEnabled(enabled);
+}
+
+
+bool CategorizedCombo::eventFilter(QObject * o, QEvent * e)
+{
+ if (e->type() != QEvent::KeyPress)
+ return QComboBox::eventFilter(o, e);
+
+ QKeyEvent * ke = static_cast<QKeyEvent*>(e);
+ bool modified = (ke->modifiers() == Qt::ControlModifier)
+ || (ke->modifiers() == Qt::AltModifier)
+ || (ke->modifiers() == Qt::MetaModifier);
+
+ switch (ke->key()) {
+ case Qt::Key_Escape:
+ if (!modified && !d->filter_.isEmpty()) {
+ d->resetFilter();
+ return true;
+ }
+ break;
+ case Qt::Key_Backspace:
+ if (!modified) {
+ // cut off one character
+ d->setFilter(d->filter_.left(d->filter_.length() - 1));
+ }
+ break;
+ default:
+ if (modified || ke->text().isEmpty())
+ break;
+ // find chars for the filter string
+ QString s;
+ for (int i = 0; i < ke->text().length(); ++i) {
+ QChar c = ke->text()[i];
+ if (c.isLetterOrNumber()
+ || c.isSymbol()
+ || c.isPunct()
+ || c.category() == QChar::Separator_Space) {
+ s += c;
+ }
+ }
+ if (!s.isEmpty()) {
+ // append new chars to the filter string
+ d->setFilter(d->filter_ + s);
+ return true;
+ }
+ break;
+ }
+
+ return QComboBox::eventFilter(o, e);
+}
+
+
+void CategorizedCombo::setIconSize(QSize size)
+{
+#ifdef Q_WS_MACX
+ bool small = size.height() < 20;
+ setAttribute(Qt::WA_MacSmallSize, small);
+ setAttribute(Qt::WA_MacNormalSize, !small);
+#else
+ (void)size; // suppress warning
+#endif
+}
+
+
+bool CategorizedCombo::set(QString const & item)
+{
+ d->resetFilter();
+
+ int const curItem = currentIndex();
+ QModelIndex const mindex =
+ d->filterModel_->mapToSource(d->filterModel_->index(curItem, 1));
+ QString const & currentItem = d->model_->itemFromIndex(mindex)->text();
+ if (item == currentItem) {
+ LYXERR(Debug::GUI, "Already had " << item << " selected.");
+ return true;
+ }
+
+ QList<QStandardItem *> r = d->model_->findItems(item, Qt::MatchExactly, 1);
+ if (r.empty()) {
+ LYXERR0("Trying to select non existent layout type " << item);
+ return false;
+ }
+
+ setCurrentIndex(d->filterModel_->mapFromSource(r.first()->index()).row());
+ return true;
+}
+
+
+void CategorizedCombo::addItemSort(QString const & item, QString const & guiname,
+ QString const & category, QString const & tooltip,
+ bool sorted, bool sortedByCat, bool sortCats,
+ bool available)
+{
+ QString titem = available ? guiname : qt_("Unavailable: %1").arg(guiname);
+ bool const uncategorized = category.isEmpty();
+ QString qcat = uncategorized ? qt_("Uncategorized") : category;
+
+ QList<QStandardItem *> row;
+ QStandardItem * gui = new QStandardItem(titem);
+ if (!tooltip.isEmpty())
+ gui->setToolTip(tooltip);
+ row.append(gui);
+ row.append(new QStandardItem(item));
+ row.append(new QStandardItem(qcat));
+ row.append(new QStandardItem(available));
+
+ // the first entry is easy
+ int const end = d->model_->rowCount();
+ if (end == 0) {
+ d->model_->appendRow(row);
+ return;
+ }
+
+ // find category
+ int i = 0;
+ if (sortedByCat) {
+ while (i < end && d->model_->item(i, 2)->text() != qcat
+ && (!sortCats || (d->model_->item(i, 2)->text().localeAwareCompare(qcat) < 0)
+ || (uncategorized && d->model_->item(i, 2)->text() == qt_("Uncategorized"))))
+ ++i;
+ }
+
+ // the simple unsorted case
+ if (!sorted) {
+ if (sortedByCat) {
+ // jump to the end of the category group
+ while (i < end && d->model_->item(i, 2)->text() == qcat)
+ ++i;
+ d->model_->insertRow(i, row);
+ } else
+ d->model_->appendRow(row);
+ return;
+ }
+
+ // find row to insert the item, after the separator if it exists
+ if (i < end) {
+ // find alphabetic position, unavailable at the end
+ while (i != end
+ && ((available && d->model_->item(i, 0)->text().localeAwareCompare(titem) < 0)
+ || ((!available && d->model_->item(i, 3))
+ || d->model_->item(i, 0)->text().localeAwareCompare(titem) < 0))
+ && (!sortedByCat || d->model_->item(i, 2)->text() == qcat))
+ ++i;
+ }
+
+ d->model_->insertRow(i, row);
+}
+
+
+QString CategorizedCombo::getData(int row) const
+{
+ return d->model_->data(d->model_->index(row, 1), Qt::DisplayRole).toString();
+}
+
+
+void CategorizedCombo::reset()
+{
+ d->resetFilter();
+ d->model_->clear();
+}
+
+
+void CategorizedCombo::updateCombo()
+{
+ d->countCategories();
+
+ // needed to recalculate size hint
+ hide();
+ setMinimumWidth(sizeHint().width());
+ show();
+}
+
+
+QString const & CategorizedCombo::filter() const
+{
+ return d->filter_;
+}
+
+
+#include "moc_CategorizedCombo.cpp"
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