kworship/css/KwCssStyleStates.h

   1 #ifndef _KwCssStyleStates_h_
   2 #define _KwCssStyleStates_h_
   3
   4 /**
   5  * @file KwCssStyleStates.h
   6  * @brief Set of cascading style property states.
   7  * @author James Hogan <james@albanarts.com>
   8  */
   9
  10 #include "KwCssStyle.h"
  11
  12 #include <QHash>
  13
  14 #include <cassert>
  15
  16 class KwCssAbstractStyleState;
  17
  18 /// Set of cascading style properties.
  19 class KwCssStyleStates
  20 {
  21   public:
  22
  23     /*
  24      * Constructors + destructors
  25      */
  26
  27     /// Default constructor.
  28     KwCssStyleStates();
  29
  30     /// Copy constructor.
  31     KwCssStyleStates(const KwCssStyleStates& other);
  32
  33     /// Destructor.
  34     virtual ~KwCssStyleStates();
  35
  36     /*
  37      * Main interface
  38      */
  39
  40     /// Clear all states.
  41     void clear();
  42
  43     /// Get a state.
  44     const KwCssAbstractStyleState* getRawStyle(QString name) const;
  45
  46     /// Get the value of a state.
  47     template <typename T>
  48     T getStyle(QString name) const
  49     {
  50       const KwCssAbstractStyleState* rawStyle = getRawStyle(name);
  51       if (0 != rawStyle)
  52       {
  53         const KwCssStyleState<T>* style = dynamic_cast<const KwCssStyleState<T>*>(rawStyle);
  54         assert(0 != style &&"style with incorrect type");
  55         if (0 != style)
  56         {
  57           return style->getValue();
  58         }
  59       }
  60       return T();
  61     }
  62
  63     /*
  64      * Operators
  65      */
  66
  67     /// Copy assignment operator.
  68     KwCssStyleStates& operator = (const KwCssStyleStates& other);
  69
  70     /// Index into styles mapping.
  71     KwCssAbstractStyleState*& operator [] (QString name);
  72
  73   private:
  74
  75     /*
  76      * Types
  77      */
  78
  79     /// Dictionary of strings to styles.
  80     typedef QHash<QString, KwCssAbstractStyleState*> StyleStateDictionary;
  81
  82     /*
  83      * Variables
  84      */
  85
  86     /// The style properties.
  87     StyleStateDictionary m_styleStates;
  88
  89 };
  90
  91 #endif // _KwCssStyleStates_h_
  92