Ruler scale calculation optimization

[pulseview.git] / pv / view / view.hpp

diff --git a/pv/view/view.hpp b/pv/view/view.hpp
index 3e0a347142fb91b69b72301c4adeaa60e109e07b..ff7795c5a68dbd55b92204d7236817e2dce35182 100644 (file)
--- a/pv/view/view.hpp
+++ b/pv/view/view.hpp
@@ -34,6 +34,7 @@
 #include <QTimer>
 
 #include <pv/data/signaldata.hpp>
+#include <pv/util.hpp>
 
 #include "cursorpair.hpp"
 #include "flag.hpp"
@@ -69,6 +70,7 @@ private:
        static const double MinScale;
 
        static const int MaxScrollValue;
+       static const int MaxViewAutoUpdateRate;
 
        static const int ScaleUnits[3];
 
@@ -123,11 +125,21 @@ public:
         */
        unsigned int tick_prefix() const;
 
+       /**
+        * Returns the number of fractional digits shown for the time markings.
+        */
+       unsigned int tick_precision() const;
+
        /**
         * Returns period of the graticule time markings.
         */
        double tick_period() const;
 
+       /**
+        * Returns the unit of time currently used.
+        */
+       util::TimeUnit time_unit() const;
+
        /**
         * Returns the number of nested parents that this row item owner has.
         */
@@ -136,7 +148,7 @@ public:
        void zoom(double steps);
        void zoom(double steps, int offset);
 
-       void zoom_fit();
+       void zoom_fit(bool gui_state);
 
        void zoom_one_to_one();
 
@@ -152,6 +164,12 @@ public:
 
        std::pair<double, double> get_time_extents() const;
 
+       /**
+        * Enables or disables sticky scrolling, i.e. the view always shows
+        * the most recent samples when capturing data.
+        */
+       void enable_sticky_scrolling(bool state);
+
        /**
         * Returns true if cursors are displayed. false otherwise.
         */
@@ -200,6 +218,10 @@ Q_SIGNALS:
 
        void scale_offset_changed();
 
+       void sticky_scrolling_changed(bool state);
+
+       void always_zoom_to_fit_changed(bool state);
+
 private:
        void get_scroll_layout(double &length, double &offset) const;
 
@@ -248,6 +270,8 @@ private:
                        std::shared_ptr<Signal> > &signal_map,
                std::set< std::shared_ptr<Trace> > &add_list);
 
+       void determine_time_unit();
+
 private:
        bool eventFilter(QObject *object, QEvent *event);
 
@@ -267,8 +291,11 @@ private Q_SLOTS:
        void v_scroll_value_changed();
 
        void signals_changed();
+       void capture_state_updated(int state);
        void data_updated();
 
+       void perform_delayed_view_update();
+
        void process_sticky_events();
 
        void on_hover_point_changed();
@@ -287,9 +314,14 @@ private:
        double offset_;
 
        bool updating_scroll_;
+       bool sticky_scrolling_;
+       bool always_zoom_to_fit_;
+       QTimer delayed_view_updater_;
 
        double tick_period_;
        unsigned int tick_prefix_;
+       unsigned int tick_precision_;
+       util::TimeUnit time_unit_;
 
        bool show_cursors_;
        std::shared_ptr<CursorPair> cursors_;