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#include "filterwidget.h"
#include "eventfilter.h"
#include <log.h>
using namespace MOBase;
FilterWidgetProxyModel::FilterWidgetProxyModel(FilterWidget& fw, QWidget* parent)
: QSortFilterProxyModel(parent), m_filter(fw)
{
connect(&fw, &FilterWidget::changed, [&]{ invalidateFilter(); });
}
bool FilterWidgetProxyModel::filterAcceptsRow(
int sourceRow, const QModelIndex& sourceParent) const
{
const auto cols = sourceModel()->columnCount();
const auto m = m_filter.matches([&](auto&& what) {
for (int c=0; c<cols; ++c) {
QModelIndex index = sourceModel()->index(sourceRow, c, sourceParent);
const auto text = sourceModel()->data(index, Qt::DisplayRole).toString();
if (text.contains(what, Qt::CaseInsensitive)) {
return true;
}
}
return false;
});
return m;
}
FilterWidget::FilterWidget() :
m_edit(nullptr), m_list(nullptr), m_proxy(nullptr),
m_eventFilter(nullptr), m_clear(nullptr)
{
}
void FilterWidget::setEdit(QLineEdit* edit)
{
unhook();
m_edit = edit;
if (!m_edit) {
return;
}
m_edit->setPlaceholderText(QObject::tr("Filter"));
createClear();
hookEvents();
clear();
}
void FilterWidget::setList(QAbstractItemView* list)
{
m_list = list;
m_proxy = new FilterWidgetProxyModel(*this);
m_proxy->setSourceModel(m_list->model());
m_list->setModel(m_proxy);
}
void FilterWidget::clear()
{
if (!m_edit) {
return;
}
m_edit->clear();
}
bool FilterWidget::empty() const
{
return m_text.isEmpty();
}
QModelIndex FilterWidget::map(const QModelIndex& index)
{
if (m_proxy) {
return m_proxy->mapToSource(index);
} else {
log::error("FilterWidget::map() called, but proxy isn't set up");
return index;
}
}
void FilterWidget::compile()
{
m_compiled.clear();
const QStringList ORList = [&] {
QString filterCopy = QString(m_text);
filterCopy.replace("||", ";").replace("OR", ";").replace("|", ";");
return filterCopy.split(";", QString::SkipEmptyParts);
}();
// split in ORSegments that internally use AND logic
for (auto& ORSegment : ORList) {
m_compiled.push_back(ORSegment.split(" ", QString::SkipEmptyParts));
}
}
bool FilterWidget::matches(std::function<bool (const QString& what)> pred) const
{
if (m_compiled.isEmpty() || !pred) {
return true;
}
for (auto& ANDKeywords : m_compiled) {
bool segmentGood = true;
// check each word in the segment for match, each word needs to be matched
// but it doesn't matter where.
for (auto& currentKeyword : ANDKeywords) {
if (!pred(currentKeyword)) {
segmentGood = false;
}
}
if (segmentGood) {
// the last AND loop didn't break so the ORSegments is true so mod
// matches filter
return true;
}
}
return false;
}
void FilterWidget::unhook()
{
if (m_clear) {
delete m_clear;
m_clear = nullptr;
}
if (m_edit) {
m_edit->removeEventFilter(m_eventFilter);
}
if (m_proxy && m_list) {
auto* model = m_proxy->sourceModel();
m_proxy->setSourceModel(nullptr);
delete m_proxy;
m_list->setModel(model);
}
}
void FilterWidget::createClear()
{
m_clear = new QToolButton(m_edit);
QPixmap pixmap(":/MO/gui/edit_clear");
m_clear->setIcon(QIcon(pixmap));
m_clear->setIconSize(pixmap.size());
m_clear->setCursor(Qt::ArrowCursor);
m_clear->setStyleSheet("QToolButton { border: none; padding: 0px; }");
m_clear->hide();
QObject::connect(m_clear, &QToolButton::clicked, [&]{ clear(); });
QObject::connect(m_edit, &QLineEdit::textChanged, [&]{ onTextChanged(); });
repositionClearButton();
}
void FilterWidget::hookEvents()
{
m_eventFilter = new EventFilter(m_edit, [&](auto* w, auto* e) {
if (e->type() == QEvent::Resize) {
onResized();
}
return false;
});
m_edit->installEventFilter(m_eventFilter);
}
void FilterWidget::onTextChanged()
{
m_clear->setVisible(!m_edit->text().isEmpty());
const auto text = m_edit->text();
if (text != m_text) {
m_text = text;
compile();
if (m_proxy) {
m_proxy->invalidateFilter();
}
emit changed();
}
}
void FilterWidget::onResized()
{
repositionClearButton();
}
void FilterWidget::repositionClearButton()
{
if (!m_clear) {
return;
}
const QSize sz = m_clear->sizeHint();
const int frame = m_edit->style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
const auto r = m_edit->rect();
const auto x = r.right() - frame - sz.width();
const auto y = (r.bottom() + 1 - sz.height()) / 2;
m_clear->move(x, y);
}
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