spacerbase.c

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// -----------------------------------------------------------
class SpacerBase : ScriptedWidgetEventHandler
{
    protected Widget m_root;
    protected int m_count;
 
    // -----------------------------------------------------------
    void OnWidgetScriptInit(Widget w)
    {
        m_root = w;
        m_count = 0;
    
        Widget child = m_root.GetChildren();
        while (child)
        {
            m_count++;
            child.SetFlags(WidgetFlags.EXACTPOS | WidgetFlags.EXACTSIZE, false);
            child = child.GetSibling();
        }
    
        m_root.SetHandler(this);
    }
    
    // -----------------------------------------------------------
    override bool OnUpdate(Widget w)
    {
        if (w == m_root) UpdateLayout();
        return false;
    }
    
    // -----------------------------------------------------------
    override bool OnChildAdd( Widget  w, Widget  child)
    {
        m_count++;
        child.SetFlags(WidgetFlags.EXACTPOS | WidgetFlags.EXACTSIZE, false);
        return false;
    }
    
    // -----------------------------------------------------------
    override bool OnChildRemove( Widget  w, Widget  child)
    {
        m_count--;
        return false;
    }
    
    // -----------------------------------------------------------
    protected int GetChildIndex(Widget w)
    {
        Widget child = m_root.GetChildren();
    
        int index = 0;
        while (child)
        {
            if (child == w) return index;
    
            index++;
            child = child.GetSibling();
        }
    
        return INDEX_NOT_FOUND;
    }
    
    // -----------------------------------------------------------
    void UpdateLayout()
    {
        if (m_count == 0) return;
    
        float width;
        float height;
        m_root.GetScreenSize(width, height);
    
        Widget child = m_root.GetChildren();
        
        int index = 0;
        while (child)
        {
            UpdateChild(child, width, height, index);
            index++;
            child = child.GetSibling();
        }
    }
    protected void UpdateChild(Widget child, float w, float h, int index) {}
};