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class ObjectFollower extends ScriptedWidgetEventHandler
{
reference int m_PivotYOffset;
protected Widget m_Root;
protected Object m_TargetObject;
protected bool m_Visible;
void ObjectFollower()
{
m_Visible = false;
//GetGame().GetUpdateQueue(CALL_CATEGORY_GUI).Insert(Update);
}
void ~ObjectFollower()
{
//GetGame().GetUpdateQueue(CALL_CATEGORY_GUI).Remove(Update);
}
protected void OnWidgetScriptInit(Widget w)
{
m_Root = w;
m_Root.SetHandler(this);
}
void SetTarget(Object obj)
{
m_TargetObject = obj;
}
override bool OnUpdate(Widget w)
{
if ( m_Root == w )
{
Update();
return true;
}
return false;
}
void Update()
{
float x, y;
if(m_Visible)
{
if(m_TargetObject)
{
GetOnScreenPosition(x, y);
}
m_Root.Show(true);
}
else
{
m_Root.Show(false);
}
}
protected void GetOnScreenPosition(out float x, out float y)
{
const float DEFAULT_HANDLE_OFFSET = 0.2;
float pivotYOffset = 0.0;
bool ignorePivot = false;
bool traceMatched = false;
bool isDefaultPos = false;
vector objectPos;
if(m_TargetObject)
{
pivotYOffset = m_PivotYOffset;
traceMatched = true;
objectPos = m_TargetObject.GetPosition();
if ( pivotYOffset != 0.0 )
{ objectPos[1] = objectPos[1] + pivotYOffset; }
else
{ objectPos[1] = objectPos[1] + DEFAULT_HANDLE_OFFSET; }
}
else
{
// default position for the action cursor
traceMatched = false;
isDefaultPos = true;
}
if ( ignorePivot && !traceMatched )
{
// hides the widget if we are in situation that the widget will be displayed on pivot point
// and we do not want to display it
x = 0.0;
y = 0.0;
}
else
{
// calculate screen position from traced results
if( isDefaultPos )
{
int w,h;
GetScreenSize(w, h);
x = w/2;
y = h/2;
}
else
{
vector screen_pos = GetGame().GetScreenPos( objectPos );
x = screen_pos[0];
y = screen_pos[1];
}
}
objectPos = "0 0 0";
isDefaultPos = false;
}
} |