/// <summary> Will remove this Drawable from whatever que it is a member of</summary>
internal void removeFromQue()
{
if (nextDrawable != null)
{
//middle of que
if (previousDrawable != null)
{
nextDrawable.previousDrawable = this.previousDrawable;
previousDrawable.nextDrawable = this.nextDrawable;
}
//start of que
else
{
nextDrawable.previousDrawable = previousDrawable;
}
}
//end of que
else if (previousDrawable != null)
{
previousDrawable.nextDrawable = nextDrawable;
}
previousDrawable = null;
nextDrawable = null;
currentDrawSet = null;
movedInDrawSet();
}
/// <summary>
/// Will Add this Drawable and all of the Drawables that come after it
/// to the queue directly after the specified item
/// </summary>
/// <param name="previousItem"></param>
internal void addListToQueue(Drawable previousItem)
{
if (previousItem != null)
{
//Find LastNode and update nodes all nodes in list
Drawable lastNode = this;
while (lastNode.nextDrawable != null)
{
lastNode = lastNode.nextDrawable;
lastNode.currentDrawSet = previousItem.currentDrawSet;
lastNode.priority = previousItem.priority;
movedInDrawSet();
}
//disconnect from previous node
if (previousDrawable != null)
{
previousDrawable.nextDrawable = null;
}
//update self
previousDrawable = previousItem;
lastNode.nextDrawable = previousItem.nextDrawable;
currentDrawSet = previousItem.currentDrawSet;
priority = previousItem.priority;
}
movedInDrawSet();
}
/// <summary>
/// Will attempt to add this Drawable to the given DrawSet.
/// </summary>
/// <param name="targetDrawSet">The DrawSet this object will be added to.
/// Note, if this objects priority is not within the targetDrawSet's range of available priorities it will be adjusted to to the closest one</param>
/// <returns>If True, this was successfully added to the drawSet, if false no changes were made</returns>
public bool addToDrawSet(DrawSet targetDrawSet)
{
if (targetDrawSet != null && (currentDrawSet == null || targetDrawSet != currentDrawSet))
{
if (currentDrawSet != null)
{
removeFromDrawSet();
}
return(targetDrawSet.addToDrawSet(this));
}
return(false);
}
/// <summary>
/// Will set this object priority.
/// Priority is used to determine draw order, higher priority items are drawn first, lower priority items are drawn last.
/// Priority is represented by an inteteger value ranging from zero to the max priority
/// maxpriority is determined by the
/// </summary>
/// <returns>If True the prioirity was changed successfully, otherwise returns false</returns>
public bool setPriority(int newPriority)
{
if (newPriority >= 0 && (currentDrawSet == null || newPriority < currentDrawSet.getAvailablePriorities()))
{
priority = newPriority;
if (currentDrawSet != null)
{
DrawSet drawSet = currentDrawSet;
removeFromDrawSet();
drawSet.addToDrawSet(this);
}
return(true);
}
return(false);
}
/// <summary>Will add this Drawable Object to que governed by the given nullItem</summary>
/// <param name="firstItem"> The FirstDrawable Item in the Que that does not actualy Draw anything</param>
internal void addToQueue(Drawable previousItem)
{
if (previousItem != null)
{
if (nextDrawable != null || previousDrawable != null)
{
removeFromQue();
}
//update self
nextDrawable = previousItem.nextDrawable;
if (nextDrawable != null)
{
nextDrawable.previousDrawable = this;
}
previousItem.nextDrawable = this;
previousDrawable = previousItem;
currentDrawSet = previousItem.currentDrawSet;
priority = previousItem.priority;
movedInDrawSet();
}
}
/// <summary>
/// Will reset this Drawables currentDrawSet and priority to the following
/// Note, No error checks are made by this function
/// </summary>
/// <param name="newDrawSet"></param>
/// <param name="priority"></param>
protected internal void setDrawSet(DrawSet newDrawSet, int newPriority)
{
currentDrawSet = newDrawSet;
this.priority = newPriority;
}
