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Lts/Common/LtsTimelineClassic/TimelineIndicator.h

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+/**
+  * @RDE_HEADER@
+  * offers zoom-buttons, current zoom in percent and date-time indicators coresponding to the viewport
+  * $Id$
+  * $HeadURL$
+  * $Author$
+  * Created by Mike Wille, SLSE, 2014-10-01
+  */
+
+#pragma once
+
+#include "EventTools.h"
+#include "LineMap.h"
+#include <QWidget>
+#include <QPoint>
+#include <QPair>
+
+
+namespace NGL
+{
+class INGLLogger;
+//class Settings;
+}
+class QPushButton;
+class QLabel;
+class QComboBox;
+
+
+namespace LtsTimelineClassic
+{
+
+/**
+ * @brief offers zoom-buttons, current zoom in percent and date-time indicators coresponding to the viewport
+ */
+class TimelineIndicator : public QWidget
+{
+  Q_OBJECT
+
+  //static const int s_MinimalZoomPoints = 1; // no need to zoom out of 100% (logically)
+  static const int s_TimeTextDistanceTolerancePixels =  10;
+  static const int s_pbSize = 18;
+
+public:
+  explicit TimelineIndicator(QWidget *parent);
+  ~TimelineIndicator();
+  qint64 zoomFactorPoints() const { return m_zoomFactorPoints * 1000; }
+
+  /**
+   * @brief refreshes the indicator data, which triggers all views to refresh also
+   */
+  void refreshData();
+
+private:
+  QVector<qint64> m_timeArray;
+  qint64 m_zoomFactorPoints;
+  QPushButton *m_pbZoom;
+  QPushButton *m_pbUnzoom;
+  QComboBox *m_cbZoomLevel;
+  int m_currentTextHeight; // text height of last drawn text
+  int m_currentTextWidth;
+  LineMap m_lineMap;
+  int m_sectionPos;
+  int m_sectionSize;
+  NGL::INGLLogger &m_logger;
+
+protected:
+  /**
+   * @brief draws all date texts on itself
+   */
+  void paintEvent(QPaintEvent *);
+
+signals:
+  /**
+   * @brief gives connected classes new max & min values
+   * @param min new first event in timeline in seconds since epoch
+   * @param max new last event in timeline in seconds since epoch
+   */
+  void signalSetTimelineRange(qint64 min, qint64 max);
+
+  /**
+   * @brief gives connected classes new zoom factor value (seconds)
+   * @param zoomFactor new zoom factor
+   */
+  void signalSetZoomFactor(qint64 zoomFactor);
+
+  /**
+   * @brief gives connected classes the command to delete their line list (date text line lists)
+   */
+  void signalResetLineList();
+
+  /**
+   * @brief gives connected classes date text line pixel position which should be added to a list,
+   * so that the view can draw them on itself
+   * @param posX pixel position of date text line
+   */
+  void signalAddLine(int posX, qint64 time);
+
+  void signalZoomChanged();
+
+
+private slots:
+  void afterZoom();
+
+
+public slots:
+
+  /**
+   * @brief sets new values to this class
+   * @param index affected column
+   * @param oldSize old width of column
+   * @param newSize new width of column
+   */
+  void slotSectionResized(int logicalIndex, int oldSize, int newSize);
+
+  /**
+   * @brief is called when push button "zoom" (+) is pressed
+   */
+  void slotZoom();
+
+  /**
+   * @brief is called when push button "zoom" (+) is pressed
+   */
+  void slotUnzoom();
+
+  /**
+   * @brief deletes line list (date text line lists)
+   */
+  void slotResetLineList();
+
+  /**
+   * @brief add date text line pixel position which should be added to a list,
+   * so that the view can draw them on itself
+   * @param posX pixel position of date text line
+   */
+  void slotAddLine(double posX, qint64 time);
+
+};
+
+}