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Masterarbeit/openvibe/extras-master/plugins/processing/simple-visualization/src/ovpCTimeRuler.h

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+#pragma once
+
+#include "ovpIStreamDatabase.h"
+#include <openvibe/ov_all.h>
+#include <gtk/gtk.h>
+
+namespace OpenViBE {
+namespace Plugins {
+namespace SimpleVisualization {
+/**
+ * Displays a time ruler.
+ * Uses information fetched from a stream database object.
+ */
+class CTimeRuler
+{
+public:
+	/**
+	 * \brief Constructor
+	 * \param streamDatabase Object from which data is retrieved
+	 * \param width Width to be requested by widget
+	 * \param height Height to be requested by widget
+	 */
+	CTimeRuler(IStreamDatabase& streamDatabase, int width, int height);
+
+	/**
+	 * \brief Destructor
+	 */
+	~CTimeRuler() = default;
+
+	/**
+	 * \brief Get widget handled by this object
+	 * \return Gtk widget
+	 */
+	GtkWidget* getWidget() const { return m_widget; }
+
+	/**
+	 * \brief Toggle ruler on/off
+	 * \param active Activation flag
+	 */
+	void toggle(const bool active) const { active ? gtk_widget_show(m_widget) : gtk_widget_hide(m_widget); }
+
+	/**
+	 * \brief Draw ruler
+	 */
+	void draw();
+
+	/**
+	 * \brief Link ruler width to another widget's
+	 * \param widget Widget whose width must be matched by this object
+	 */
+	void linkWidthToWidget(GtkWidget* widget);
+
+	/**
+	 * \brief Callback notified upon resize events
+	 * \param width New window width
+	 * \remarks height is the m_heightRequest
+	 */
+	void onResizeEventCB(const gint width, gint /*height*/) const { gtk_widget_set_size_request(m_widget, width, m_height); }
+
+private:
+	//! Ruler widget
+	GtkWidget* m_widget = nullptr;
+	//! Database from which stream information is retrieved
+	IStreamDatabase& m_stream;
+	//! Height request
+	int m_height = 0;
+	//! Size available per label along the ruler
+	uint64_t m_pixelsPerLabel = 20;
+};
+}  // namespace SimpleVisualization
+}  // namespace Plugins
+}  // namespace OpenViBE