graphic android patches: buttons moved to popup-menu on tap-and-hold gesture

libs/graphic/graphic.h

@@ -31,6 +31,7 @@
 #include <QElapsedTimer>
 #include <QTranslator>
 #include <QGestureEvent>
+#include <QMenu>
 #include <qmath.h>
 #include <float.h>
 #include "graphic_conf.h"
@@ -402,6 +403,7 @@ protected:
 	GraphicConf * conf;
 	EvalSpinBox line_x_min, line_x_max, line_y_min, line_y_max;
 	QElapsedTimer tm;
+	QMenu * buttons_menu = nullptr;
 #ifdef Q_OS_ANDROID
 	QElapsedTimer tm_fscr;
 #endif
@@ -448,6 +450,7 @@ protected slots:
 	void actionGuidesTriggered(QAction * a);
 	void enterFullscreen();
 	void leaveFullscreen();
+	void showMenu();
 
 signals:
 	void beforeGraphicPaintEvent(QPainter * );