tb_widget_value.h

// ================================================================================
// ==      This file is a part of Turbo Badger. (C) 2011-2014, Emil Segerås      ==
// ==                     See tb_core.h for more information.                    ==
// ================================================================================

#ifndef TB_WIDGET_VALUE_H
#define TB_WIDGET_VALUE_H

#include "tb_core.h"
#include "tb_linklist.h"
#include "tb_hashtable.h"
#include "tb_value.h"
#include "tb_id.h"

namespace tb {

class TBWidget;
class TBWidgetValue;
class TBValueGroup;

class TBWidgetValueConnection : public TBLinkOf<TBWidgetValueConnection>
{
public:
    TBWidgetValueConnection() : m_value(nullptr) {}
    ~TBWidgetValueConnection() { Unconnect(); }

    void Connect(TBWidgetValue *value, TBWidget *m_widget);

    void Unconnect();

    TBID GetName() const;

    void SyncFromWidget(TBWidget *source_widget);
private:
    friend class TBWidgetValue;
    TBWidgetValue *m_value;
    TBWidget *m_widget;
};

class TBWidgetValue
{
public:
    TBWidgetValue(const TBID &name, TBValue::TYPE type = TBValue::TYPE_INT);
    ~TBWidgetValue();

    void SetInt(long value);

    void SetInt(int value) { SetInt((long)value); }

    bool SetText(const TBStr & text);

    void SetDouble(double value);

    void SetValue(const TBValue & value);

    void SetFromWidget(TBWidget *source_widget);

    long GetInt() const { return m_value.GetInt(); }

    bool GetText(TBStr &text) const { text = m_value.GetString(); return true; }

    TBStr GetText() const { return m_value.GetString(); }

    double GetDouble() const { return m_value.GetFloat(); }

    const TBValue &GetValue() const { return m_value; }

    TBID GetName() const { return m_name; }

private:
    friend class TBWidgetValueConnection;
    TBID m_name;
    TBValue m_value;
    TBLinkListOf<TBWidgetValueConnection> m_connections;
    bool m_syncing;

    bool SyncToWidget(TBWidget *dst_widget);
    bool SyncToWidgets(TBWidget *exclude_widget);
};

class TBValueGroupListener : public TBLinkOf<TBValueGroupListener>
{
public:
    virtual ~TBValueGroupListener() { if (linklist) linklist->Remove(this); }

    virtual void OnValueChanged(const TBValueGroup *group, const TBWidgetValue *value) = 0;
};

class TBValueGroup
{
public:
    TBWidgetValue *CreateValueIfNeeded(const TBID &name, TBValue::TYPE type = TBValue::TYPE_INT);

    TBWidgetValue *GetValue(const TBID &name) const { return m_values.Get(name); }

    void AddListener(TBValueGroupListener *listener) { m_listeners.AddLast(listener); }

    void RemoveListener(TBValueGroupListener *listener) { m_listeners.Remove(listener); }
private:
    friend class TBWidgetValue;
    void InvokeOnValueChanged(const TBWidgetValue *value);

    TBHashTableAutoDeleteOf<TBWidgetValue> m_values;    
    TBLinkListOf<TBValueGroupListener> m_listeners;     
};

extern TBValueGroup g_value_group;

} // namespace tb

#endif // TB_WIDGET_VALUE_H