EntityAttribute.h

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#ifndef ENTITYATTRIBUTE_H_
#define ENTITYATTRIBUTE_H_

#include "../../entity.h"

namespace
{
    typedef std::list<std::string> Values;
    typedef std::map<std::string, Values> KeyValues;
    typedef std::map<std::string, KeyValues> ClassKeyValues;
    ClassKeyValues g_selectedKeyValues; 
    const EntityClass* g_current_attributes = 0;
    std::string g_currentSelectedKey;
}

class EntityAttribute
{
    public:
        virtual ~EntityAttribute (void)
        {
        }
        // An EntityAttribute must return a GtkWidget that is used to interact with
        // its values.
        virtual GtkWidget* getWidget () const = 0;
        // Update the GTK widgets based on the current value of the key.
        virtual void update () = 0;

        void entitySetValue (const std::string& classname, const std::string& key,
                const std::string& value)
        {
            std::string command = "entitySetKeyValue -classname \"" + classname + "\" -key \"" + key + "\" -value \"" + value
                    + "\"";
            UndoableCommand undo(command);
            Scene_EntitySetKeyValue_Selected(classname.c_str(), key.c_str(), value.c_str());
        }

        const std::string entityGetValueForKey (const std::string& key)
        {
            ASSERT_MESSAGE(g_current_attributes != 0, "g_current_attributes is zero");
            ClassKeyValues::iterator it = g_selectedKeyValues.find(g_current_attributes->m_name);
            if (it != g_selectedKeyValues.end()) {
                KeyValues &possibleValues = (*it).second;
                KeyValues::const_iterator i = possibleValues.find(key);
                if (i != possibleValues.end()) {
                    const Values &values = (*i).second;
                    ASSERT_MESSAGE(!values.empty(), "Values don't exist");
                    return *values.begin();
                }
            }
            return "";
        }

        inline double angle_normalised (double angle)
        {
            return float_mod(angle, 360.0);
        }

        GtkEntry* numeric_entry_new (void)
        {
            GtkEntry* entry = GTK_ENTRY(gtk_entry_new());
            gtk_widget_show(GTK_WIDGET(entry));
            widget_set_size(GTK_WIDGET(entry), 10, 0);
            return entry;
        }
};

#endif /* ENTITYATTRIBUTE_H_ */