1 files changed, 41 insertions, 0 deletions
diff --git a/Tests/CMakeGUI/CatchShow.h b/Tests/CMakeGUI/CatchShow.h
new file mode 100644
index 0000000000..0254c153cc
--- /dev/null
+++ b/Tests/CMakeGUI/CatchShow.h
@@ -0,0 +1,41 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#pragma once
+
+#include <functional>
+#include <memory>
+
+#include <QObject>
+#include <QWidget>
+
+class CatchShow : public QObject
+{
+  Q_OBJECT
+public:
+  CatchShow(QObject* parent = nullptr);
+
+  template <typename T, typename F>
+  void setCallback(F&& func);
+  bool eventFilter(QObject* obj, QEvent* event) override;
+  int count() const;
+
+private:
+  std::function<void(QObject* obj)> m_callback;
+  int m_count = 0;
+};
+
+template <typename T, typename F>
+void CatchShow::setCallback(F&& func)
+{
+  this->m_callback = [this, func](QObject* obj) {
+    auto* d = qobject_cast<T*>(obj);
+    if (d) {
+      QMetaObject::invokeMethod(obj,
+                                [this, func, d]() {
+                                  ++this->m_count;
+                                  func(d);
+                                },
+                                Qt::QueuedConnection);
+    }
+  };
+}