X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=pv%2Fview%2Fruler.h;h=00fac244ba7c46eabfb9467b4dad103da0d0c9e9;hb=0dda6fe595932b2e340930104fad8ac4fc574895;hp=7eccc8cdda9d2222fc2c300fa0d971c9a3373d14;hpb=ccdd3ef548ce34f25c6c168598556a350831aa37;p=pulseview.git

diff --git a/pv/view/ruler.h b/pv/view/ruler.h
index 7eccc8cd..00fac244 100644
--- a/pv/view/ruler.h
+++ b/pv/view/ruler.h
@@ -1,5 +1,5 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the PulseView project.
  *
  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
  *
@@ -18,38 +18,59 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
-#ifndef PV_VIEW_RULER_H
-#define PV_VIEW_RULER_H
+#ifndef PULSEVIEW_PV_VIEW_RULER_H
+#define PULSEVIEW_PV_VIEW_RULER_H
 
-#include <QWidget>
+#include <memory>
+
+#include "marginwidget.h"
 
 namespace pv {
 namespace view {
 
-class View;
-
-class Ruler : public QWidget
+class Ruler : public MarginWidget
 {
 	Q_OBJECT
 
 private:
+	static const int RulerHeight;
 	static const int MinorTickSubdivision;
 	static const int ScaleUnits[3];
 
-	static const QString SIPrefixes[9];
-	static const int FirstSIPrefixPower;
+	static const int HoverArrowSize;
 
 public:
 	Ruler(View &parent);
 
+	/**
+	 * Find a tick spacing and number formatting that does not cause
+	 * the values to collide.
+	 * @param p A QPainter used to determine the needed space for the values.
+	 * @param scale A pv::view::View's scale.
+	 * @param offset A pv::view::View's offset.
+	 *
+	 * @return The tick period to use in 'first' and the prefix in 'second'.
+	 */
+	static std::pair<double, unsigned int> calculate_tick_spacing(
+		QPainter& p, double scale, double offset);
+
+public:
+	QSize sizeHint() const;
+
 private:
 	void paintEvent(QPaintEvent *event);
 
 private:
-	View &_view;
+	/**
+	 * Draw a hover arrow under the cursor position.
+	 */
+	void draw_hover_mark(QPainter &p);
+
+private Q_SLOTS:
+	void hover_point_changed();
 };
 
 } // namespace view
 } // namespace pv
 
-#endif // PV_VIEW_HEADER_H
+#endif // PULSEVIEW_PV_VIEW_RULER_H