1 files changed, 70 insertions, 0 deletions
diff --git a/src/filterwidget.h b/src/filterwidget.h
new file mode 100644
index 00000000..4fb9831f
--- /dev/null
+++ b/src/filterwidget.h
@@ -0,0 +1,70 @@
+#ifndef FILTERWIDGET_H
+#define FILTERWIDGET_H
+
+#include <QObject>
+#include <QLineEdit>
+#include <QToolButton>
+#include <QList>
+#include <QAbstractItemView>
+
+class EventFilter;
+class FilterWidget;
+
+class FilterWidgetProxyModel : public QSortFilterProxyModel
+{
+  Q_OBJECT;
+
+public:
+  FilterWidgetProxyModel(FilterWidget& fw, QWidget* parent=nullptr);
+  using QSortFilterProxyModel::invalidateFilter;
+
+protected:
+  bool filterAcceptsRow(int row, const QModelIndex& parent) const override;
+
+private:
+  FilterWidget& m_filter;
+};
+
+
+class FilterWidget : public QObject
+{
+  Q_OBJECT;
+
+public:
+  using predFun = std::function<bool (const QString& what)>;
+
+  FilterWidget();
+
+  void setEdit(QLineEdit* edit);
+  void setList(QAbstractItemView* list);
+  void clear();
+  bool empty() const;
+
+  QModelIndex map(const QModelIndex& index);
+
+  bool matches(predFun pred) const;
+
+signals:
+  void changed();
+
+private:
+  QLineEdit* m_edit;
+  QAbstractItemView* m_list;
+  FilterWidgetProxyModel* m_proxy;
+  EventFilter* m_eventFilter;
+  QToolButton* m_clear;
+  QString m_text;
+  QList<QList<QString>> m_compiled;
+
+  void unhook();
+  void createClear();
+  void hookEvents();
+  void repositionClearButton();
+
+  void onTextChanged();
+  void onResized();
+
+  void compile();
+};
+
+#endif // FILTERWIDGET_H