src/search/searchcriterionvalue.h

   1 /***************************************************************************
   2  *   Copyright (C) 2009 by Adam Kidder <thekidder@gmail.com>               *
   3  *   Copyright (C) 2009 by Peter Penz <peter.penz@gmx.at>                  *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  19  ***************************************************************************/
  20
  21 #ifndef SEARCHCRITERIONVALUE_H
  22 #define SEARCHCRITERIONVALUE_H
  23
  24 #define DISABLE_NEPOMUK_LEGACY
  25 #include <nepomuk/literalterm.h>
  26
  27 #include <QWidget>
  28
  29 class QComboBox;
  30 class KDateWidget;
  31 class KRatingWidget;
  32 class KLineEdit;
  33
  34 /**
  35  * @brief Helper class for SearchCriterionSelector.
  36  * Represents an input widget for the value of a search criterion.
  37  */
  38 class SearchCriterionValue : public QWidget
  39 {
  40     Q_OBJECT
  41
  42 public:
  43     SearchCriterionValue(QWidget* parent = 0);
  44     virtual ~SearchCriterionValue();
  45
  46     /**
  47      * Must be overwritten by derived classes and returns
  48      * the literal term of the search criterion value.
  49      */
  50     virtual Nepomuk::Query::LiteralTerm value() const = 0;
  51
  52     /**
  53      * Initializes the widget on the base of the given value-type.
  54      * It is in the hand of the derived classes to interprete
  55      * the value-type string and create a corresponding value for
  56      * the widget (@see SearchCriterionSelector::Comparator).
  57      * The default implementation is empty.
  58      */
  59     virtual void initializeValue(const QString& valueType);
  60
  61 signals:
  62     void valueChanged(const Nepomuk::Query::LiteralTerm& value);
  63 };
  64
  65
  66
  67 /** @brief Allows to input a date value as search criterion. */
  68 class DateValue : public SearchCriterionValue
  69 {
  70     Q_OBJECT
  71
  72 public:
  73     DateValue(QWidget* parent = 0);
  74     virtual ~DateValue();
  75     virtual Nepomuk::Query::LiteralTerm value() const;
  76     virtual void initializeValue(const QString& valueType);
  77
  78 private:
  79     KDateWidget* m_dateWidget;
  80 };
  81
  82
  83
  84 /** @brief Allows to input a tag  as search criterion. */
  85 class TagValue : public SearchCriterionValue
  86 {
  87     Q_OBJECT
  88
  89 public:
  90     TagValue(QWidget* parent = 0);
  91     virtual ~TagValue();
  92     virtual Nepomuk::Query::LiteralTerm value() const;
  93
  94 protected:
  95     virtual void showEvent(QShowEvent* event);
  96
  97 private:
  98     QComboBox* m_tags;
  99 };
 100
 101
 102
 103 /** @brief Allows to input a file size value as search criterion. */
 104 class SizeValue : public SearchCriterionValue
 105 {
 106     Q_OBJECT
 107
 108 public:
 109     SizeValue(QWidget* parent = 0);
 110     virtual ~SizeValue();
 111     virtual Nepomuk::Query::LiteralTerm value() const;
 112
 113  private:
 114     KLineEdit* m_lineEdit;
 115     QComboBox* m_units;
 116 };
 117
 118 /** @brief Allows to input a rating value as search criterion. */
 119 class RatingValue : public SearchCriterionValue
 120 {
 121     Q_OBJECT
 122
 123 public:
 124     RatingValue(QWidget* parent = 0);
 125     virtual ~RatingValue();
 126     virtual Nepomuk::Query::LiteralTerm value() const;
 127
 128  private:
 129     KRatingWidget* m_ratingWidget;
 130 };
 131
 132 #endif // SEARCHCRITERIONVALUE_H