1 files changed, 67 insertions, 0 deletions
diff --git a/ui/qt/geometry_state_dialog.h b/ui/qt/geometry_state_dialog.h
new file mode 100644
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+++ b/ui/qt/geometry_state_dialog.h
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+/** @file
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef GEOMETRY_STATE_DIALOG_H
+#define GEOMETRY_STATE_DIALOG_H
+
+#include <QDialog>
+
+class GeometryStateDialog : public QDialog
+{
+public:
+
+// As discussed in change 7072, QDialogs have different minimize and "on
+// top" behaviors depending on their parents, flags, and platforms.
+//
+// W = Windows, L = Linux (and other non-macOS UN*Xes), X = macOS
+//
+// QDialog(parent)
+//
+//   W,L: Always on top, no minimize button.
+//   X: Independent, no minimize button.
+//
+// QDialog(parent, Qt::Window)
+//
+//   W: Always on top, minimize button. Minimizes to a small title bar
+//      attached to the taskbar and not the taskbar itself. (The GTK+
+//      UI used to do this.)
+//   L: Always on top, minimize button.
+//   X: Independent, minimize button.
+//
+// QDialog(NULL)
+//
+//   W, L, X: Independent, no minimize button.
+//
+// QDialog(NULL, Qt::Window)
+//
+//   W, L, X: Independent, minimize button.
+//
+// Additionally, maximized, parent-less dialogs can close to a black screen
+// on macOS: https://gitlab.com/wireshark/wireshark/-/issues/12544
+//
+// Pass in the parent on macOS and NULL elsewhere so that we have an
+// independent window that un-maximizes correctly.
+
+#ifdef Q_OS_MAC
+    explicit GeometryStateDialog(QWidget *parent, Qt::WindowFlags f = Qt::WindowFlags()) : QDialog(parent, f) {}
+#else
+    explicit GeometryStateDialog(QWidget *, Qt::WindowFlags f = Qt::WindowFlags()) : QDialog(NULL, f) {}
+#endif
+    ~GeometryStateDialog();
+
+protected:
+    void loadGeometry(int width = 0, int height = 0, const QString &dialog_name = QString());
+
+private:
+    void saveGeometry();
+
+    QString dialog_name_;
+};
+
+#endif // GEOMETRY_STATE_DIALOG_H