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+/*
+ SPDX-FileCopyrightText: 2025 Felix Ernst <[email protected]>
+
+ SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+*/
+
+#ifndef CHIP_H
+#define CHIP_H
+
+#include "dolphinquery.h"
+#include "selectors/dateselector.h"
+#include "selectors/filetypeselector.h"
+#include "selectors/minimumratingselector.h"
+#include "selectors/tagsselector.h"
+#include "updatablestateinterface.h"
+
+#include <QComboBox>
+#include <QLayout>
+#include <QToolButton>
+#include <QWidget>
+
+#include <type_traits>
+
+namespace Search
+{
+
+/**
+ * @brief The non-template base class for the template class Chip.
+ *
+ * @see Chip below.
+ *
+ * Template classes cannot have Qt signals. This class works around that by being a non-template class which the template Chip class then inherits from.
+ * This base class contains all non-template logic of Chip.
+ */
+class ChipBase : public QWidget, public UpdatableStateInterface
+{
+ Q_OBJECT
+
+public:
+ ChipBase(std::shared_ptr<const DolphinQuery> dolphinQuery, QWidget *parent = nullptr);
+
+Q_SIGNALS:
+ /** Is emitted whenever settings have changed and a new search might be necessary. */
+ void configurationChanged(const DolphinQuery &dolphinQuery);
+
+protected:
+ void paintEvent(QPaintEvent *event) override;
+
+protected:
+ QToolButton *m_removeButton = nullptr;
+};
+
+/**
+ * @brief A button-sized UI component for modifying or removing search filters.
+ *
+ * A template widget is taken and this Chip forms a button-like outline around it. The Chip has a close button on the side to remove itself, which communicates
+ * to the user that the effect of the widget inside this Chip no longer applies. The functionality of the widget inside is not affected by the Chip.
+ *
+ * Most logic of this class is in the non-template ChipBase base class.
+ * @see ChipBase above.
+ */
+template<class Selector>
+class Chip : public ChipBase
+{
+public:
+ Chip(std::shared_ptr<const DolphinQuery> dolphinQuery, QWidget *parent = nullptr)
+ : ChipBase{dolphinQuery, parent}
+ , m_selector{new Selector{dolphinQuery, this}}
+ {
+ // Make the selector flat within the chip.
+ if constexpr (std::is_base_of<QComboBox, Selector>::value) {
+ m_selector->setFrame(false);
+ } else if constexpr (std::is_base_of<QToolButton, Selector>::value) {
+ m_selector->setAutoRaise(true);
+ }
+ setFocusProxy(m_selector);
+ setTabOrder(m_selector, m_removeButton);
+
+ connect(m_selector, &Selector::configurationChanged, this, &ChipBase::configurationChanged);
+
+ // The m_removeButton does not directly remove the Chip. Instead the Selector's removeRestriction() method will emit ChipBase::configurationChanged()
+ // with a DolphinQuery object that effectively removes the effects of the Selector. This in turn will then eventually remove this Chip when the new
+ // state of the Search UI components is propagated through the various UpdatableStateInterface::updateStateToMatch() methods.
+ connect(m_removeButton, &QAbstractButton::clicked, m_selector, &Selector::removeRestriction);
+
+ layout()->addWidget(m_selector);
+ layout()->addWidget(m_removeButton);
+ };
+
+private:
+ void updateState(const std::shared_ptr<const DolphinQuery> &dolphinQuery) override
+ {
+ m_selector->updateStateToMatch(dolphinQuery);
+ }
+
+private:
+ Selector *const m_selector;
+};
+}
+
+#endif