Graphic setCustomGridMarkFuncs, select decimal point when export to CSV

libs/graphic/graphic.h

@@ -339,7 +339,7 @@ public slots:
 	void setDefaultRect(const QRectF & rect);
 	void autofit() {on_graphic_buttonAutofit_clicked();}
 	void saveImage(QString filename);
-	void exportGraphics(QString filename);
+	void exportGraphics(QString filename, QChar decimal_point);
 	void clear();
 	void update(bool force);
 	void update() {update(false);}
@@ -348,6 +348,7 @@ public slots:
 	void setTraceGraphic(int arg) {if (arg < 0 || arg >= graphics.size()) return; curTrace = arg;}
 	void setGraphicsCount(int arg, bool update = true);
 	void removeGraphic(int arg, bool update = true);
+	void setCustomGridMarkFuncs(std::function<QString(double val)> fx, std::function<QString(double val)> fy);
 
 	void zoom(float factor);
 	void zoomIn() {zoom(1. / 1.2);}
@@ -430,6 +431,7 @@ protected:
 	int lastw, lasth, min_repaint_int, timer_pause, thick;
 	bool aalias, aupdate, grid, guides, isFit, isOGL, isHover, bufferActive, cancel, pause_, gestures, m_LODOptimization, m_fakeGL, need_createGL;
 	bool hasLblX, hasLblY, navigation, only_expand_y, only_expand_x, is_lines_update, leg_update, visible_update, fullscr, need_mouse_pan, was_trace;
+	std::function<QString(double val)> func_gridMarkX, func_gridMarkY;
 
 protected slots:
 	void canvasPaintEvent();