File indexing completed on 2024-04-28 03:59:13

 /* -*- c++ -*- */
 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 1998 Jörg Habenicht <j.habenicht@europemail.com>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef KRULER_H
 #define KRULER_H
 
 #include <kwidgetsaddons_export.h>
 
 #include <QAbstractSlider>
 #include <memory>
 
 /**
  * @class KRuler kruler.h KRuler
  *
  * A ruler widget.
  *
  * The vertical ruler looks similar to this:
  *
  *\code
  *    meters                       inches
  *
  *    ------   <--- end mark  ---> ------
  *        --                            -
  *        --   <---little mark--->     --
  *        --                            -
  *        --                          ---
  *       ---   <---medium mark          -
  *        --                           --
  *        --        tiny mark---->      -
  *        --                         ----
  *        --                            -
  *      ----   <-----big mark          --
  *        --                            -
  *      |>--   <--ruler pointer-->   |>--
  *
  * \endcode
  *
  * There are tiny marks, little marks, medium marks, and big marks along the
  *  ruler.
  *
  * To receive mouse clicks or mouse moves, the class has to be overloaded.
  *
  * \image html kruler.png "KRuler Widget"
  *
  * @short A ruler widget.
  * @author Jörg Habenicht
  */
 class KWIDGETSADDONS_EXPORT KRuler : public QAbstractSlider
 {
     Q_OBJECT
     Q_PROPERTY(bool showTinyMarks READ showTinyMarks WRITE setShowTinyMarks)
     Q_PROPERTY(bool showLittleMarks READ showLittleMarks WRITE setShowLittleMarks)
     Q_PROPERTY(bool showMediumMarks READ showMediumMarks WRITE setShowMediumMarks)
     Q_PROPERTY(bool showBigMarks READ showBigMarks WRITE setShowBigMarks)
     Q_PROPERTY(bool showPointer READ showPointer WRITE setShowPointer)
     Q_PROPERTY(bool showEndLabel READ showEndLabel WRITE setShowEndLabel)
     Q_PROPERTY(int tinyMarkDistance READ tinyMarkDistance WRITE setTinyMarkDistance)
     Q_PROPERTY(int littleMarkDistance READ littleMarkDistance WRITE setLittleMarkDistance)
     Q_PROPERTY(int mediumMarkDistance READ mediumMarkDistance WRITE setBigMarkDistance)
     Q_PROPERTY(int bigMarkDistance READ bigMarkDistance WRITE setBigMarkDistance)
     Q_PROPERTY(double pixelPerMark READ pixelPerMark WRITE setPixelPerMark)
     Q_PROPERTY(bool lengthFixed READ lengthFixed WRITE setLengthFixed)
     Q_PROPERTY(QString endLabel READ endLabel WRITE setEndLabel)
     Q_PROPERTY(int length READ length WRITE setLength)
     Q_PROPERTY(int offset READ offset)
     Q_PROPERTY(int endOffset READ endOffset)
 
 public:
     /**
      * The types of units used.
      */
     enum MetricStyle { Custom = 0, Pixel, Inch, Millimetres, Centimetres, Metres };
     Q_ENUM(MetricStyle)
 
     /**
      * Constructs a horizontal ruler.
      */
     explicit KRuler(QWidget *parent = nullptr);
     /**
      * Constructs a ruler with orientation @p orient.
      *
      * @p parent and @p f are passed to QFrame.
      * The default look is a raised widget
      * but may be changed with the inherited QFrame methods.
      *
      * @param orient     Orientation of the ruler.
      * @param parent     Will be handed over to QFrame.
      * @param f          Will be handed over to QFrame.
      *
      */
     explicit KRuler(Qt::Orientation orient, QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
 
     /**
      * Constructs a ruler with orientation @p orient and initial width @p widgetWidth.
      *
      * The width sets the fixed width of the widget. This is useful if you
      * want to draw the ruler bigger or smaller than the default size.
      * @note The size of the marks doesn't change.
      * @p parent and @p f are passed to QFrame.
      *
      * @param orient      Orientation of the ruler.
      * @param widgetWidth Fixed width of the widget.
      * @param parent      Will be handed over to QFrame.
      * @param f           Will be handed over to QFrame.
      *
      */
     KRuler(Qt::Orientation orient, int widgetWidth, QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
 
     /**
      * Destructor.
      */
     ~KRuler() override;
 
     /**
      * Sets the distance between tiny marks.
      *
      * This is mostly used in the English system (inches) with distance of 1.
      */
     void setTinyMarkDistance(int);
     /**
      * Returns the distance between tiny marks.
      */
     int tinyMarkDistance() const;
 
     /**
      * Sets the distance between little marks.
      *
      * The default value is 1 in the metric system and 2 in the English (inches) system.
      */
     void setLittleMarkDistance(int);
 
     /**
      * Returns the distance between little marks.
      */
     int littleMarkDistance() const;
 
     /**
      * Sets the distance between medium marks.
      *
      * For English (inches) styles it defaults to twice the little mark distance.
      * For metric styles it defaults to five times the little mark distance.
      */
     void setMediumMarkDistance(int);
     int mediumMarkDistance() const;
 
     /**
      * Sets distance between big marks.
      *
      * For English (inches) or metric styles it is twice the medium mark distance.
      */
     void setBigMarkDistance(int);
     /**
      * Returns the distance between big marks.
      */
     int bigMarkDistance() const;
 
     /**
      * Shows/hides tiny marks.
      */
     void setShowTinyMarks(bool);
     bool showTinyMarks() const;
     /**
      * Shows/hides little marks.
      */
     void setShowLittleMarks(bool);
     bool showLittleMarks() const;
     /**
      * Shows/hides medium marks.
      */
     void setShowMediumMarks(bool);
     bool showMediumMarks() const;
     /**
      * Shows/hides big marks.
      */
     void setShowBigMarks(bool);
     bool showBigMarks() const;
     /**
      * Shows/hides end marks.
      */
     void setShowEndMarks(bool);
     bool showEndMarks() const;
     /**
      * Shows/hides the pointer.
      */
     void setShowPointer(bool);
     bool showPointer() const;
 
     /**
      * Show/hide number values of the end marks.
      *
      * Default is @p false.
      */
     void setShowEndLabel(bool);
     bool showEndLabel() const;
 
     /**
      * Sets the label this is drawn at the beginning of the visible part
      * of the ruler to @p label
      */
     void setEndLabel(const QString &);
     QString endLabel() const;
 
     /**
      * Sets up the necessary tasks for the provided styles.
      *
      * A convenience method.
      */
     void setRulerMetricStyle(KRuler::MetricStyle);
 
     /**
      * Sets the number of pixels between two base marks.
      *
      * Calling this method stretches or shrinks your ruler.
      *
      * For pixel display ( MetricStyle) the value is 10.0 marks
      * per pixel ;-)
      * For English (inches) it is 9.0, and for centimetres ~2.835 -> 3.0 .
      * If you want to magnify your part of display, you have to
      * adjust the mark distance @p here.
      * Notice: The double type is only supported to give the possibility
      *         of having some double values.
      *         It should be used with care.  Using values below 10.0
      *         shows visible jumps of markpositions (e.g. 2.345).
      *         Using whole numbers is highly recommended.
      * To use @p int values use setPixelPerMark((int)your_int_value);
      * default: 1 mark per 10 pixels
      */
     void setPixelPerMark(double rate);
 
     /**
      * Returns the number of pixels between two base marks.
      */
     double pixelPerMark() const;
 
     /**
      * Sets the length of the ruler, i.e. the difference between
      * the begin mark and the end mark of the ruler.
      *
      * Same as (width() - offset())
      *
      * when the length is not locked, it gets adjusted with the
      * length of the widget.
      */
     void setLength(int);
     int length() const;
 
     /**
      * Locks the length of the ruler, i.e. the difference between
      * the two end marks doesn't change when the widget is resized.
      *
      * @param fix fixes the length, if true
      */
     void setLengthFixed(bool fix);
     bool lengthFixed() const;
 
     /**
      * Sets the number of pixels by which the ruler may slide up or left.
      * The number of pixels moved is realive to the previous position.
      * The Method makes sense for updating a ruler, which is working with
      * a scrollbar.
      *
      * This doesn't affect the position of the ruler pointer.
      * Only the visible part of the ruler is moved.
      *
      * @param count Number of pixel moving up or left relative to the previous position
      */
     void slideUp(int count = 1);
 
     /**
      * Sets the number of pixels by which the ruler may slide down or right.
      * The number of pixels moved is realive to the previous position.
      * The Method makes sense for updating a ruler, which is working with
      * a scrollbar.
      *
      * This doesn't affect the position of the ruler pointer.
      * Only the visible part of the ruler is moved.
      *
      * @param count Number of pixel moving up or left relative to the previous position
      */
     void slideDown(int count = 1);
 
     /**
      * Sets the ruler slide offset.
      *
      * This is like slideup() or slidedown() with an absolute offset
      * from the start of the ruler.
      *
      * @param offset Number of pixel to move the ruler up or left from the beginning
      */
     void setOffset(int offset);
 
     /**
      * Returns the current ruler offset.
      */
     int offset() const;
 
     int endOffset() const;
 
 public Q_SLOTS:
 
     /**
      * Sets the pointer to a new position.
      *
      * The offset is NOT updated.
      * QWidget::repaint() is called afterwards.
      */
     void slotNewValue(int);
 
     /**
      * Sets the ruler marks to a new position.
      *
      * The pointer is NOT updated.
      * QWidget::repaint() is called afterwards.
      */
     void slotNewOffset(int);
 
     void slotEndOffset(int);
 
 protected:
     void paintEvent(QPaintEvent *) override;
 
 private:
     KWIDGETSADDONS_NO_EXPORT void initWidget(Qt::Orientation orientation);
 
 private:
     std::unique_ptr<class KRulerPrivate> const d;
 };
 
 #endif