1 files changed, 72 insertions, 0 deletions
diff --git a/compat/qt-signal.hpp b/compat/qt-signal.hpp
new file mode 100644
index 00000000..f74de642
--- /dev/null
+++ b/compat/qt-signal.hpp
@@ -0,0 +1,72 @@
+#pragma once
+
+// this is to avoid dealing with QMetaObject for the time being -sh 20190203
+
+#include "export.hpp"
+namespace options { class slider_value; }
+#include <QObject>
+#include <QList>
+
+namespace _qt_sig_impl {
+
+template<typename t> struct sig;
+
+class OTR_COMPAT_EXPORT sig_void final : public QObject
+{
+    Q_OBJECT
+
+public:
+    template<typename t, typename F>
+    sig_void(t* datum, F&& f, Qt::ConnectionType conntype = Qt::AutoConnection) : QObject(datum)
+    {
+        connect(this, &sig_void::notify, datum, f, conntype);
+    }
+    explicit sig_void(QObject* parent = nullptr);
+    void operator()() const { notify(); }
+
+signals:
+    void notify() const;
+};
+
+template<> struct sig<void> { using t = sig_void; };
+
+#ifndef OTR_GENERATE_SIGNAL3
+#   define OTR_GENERATE_SIGNAL3(x)
+#endif
+#define OTR_GENERATE_SIGNAL2(type)                                              \
+    class OTR_COMPAT_EXPORT sig_##type final : public QObject                   \
+    {                                                                           \
+        Q_OBJECT                                                                \
+        public:                                                                 \
+            explicit sig_##type(QObject* parent = nullptr) : QObject(parent) {} \
+            void operator()(const type& x) const;                               \
+        Q_SIGNALS:                                                              \
+            void notify(const type& x) const;                                   \
+    };                                                                          \
+    OTR_GENERATE_SIGNAL3(type)
+
+#   define OTR_GENERATE_SIGNAL(type)                                            \
+       OTR_GENERATE_SIGNAL2(type);                                              \
+       using qlist##type = QList<type>;                                         \
+       OTR_GENERATE_SIGNAL2(qlist##type);                                       \
+       template<> struct sig<type> { using t = sig_##type; };                   \
+       template<> struct sig<qlist##type> { using t = qlist##type; }
+
+using slider_value = options::slider_value;
+
+OTR_GENERATE_SIGNAL(int);
+OTR_GENERATE_SIGNAL(double);
+OTR_GENERATE_SIGNAL(float);
+OTR_GENERATE_SIGNAL(bool);
+OTR_GENERATE_SIGNAL(QString);
+OTR_GENERATE_SIGNAL(slider_value);
+OTR_GENERATE_SIGNAL(QPointF);
+OTR_GENERATE_SIGNAL(QVariant);
+
+} // namespace _qt_sig_impl
+
+#undef OTR_GENERATE_SIGNAL2
+#undef OTR_GENERATE_SIGNAL
+
+template<typename t> using qt_signal = typename _qt_sig_impl::sig<t>::t;
+