/**
* Sets the object's parent. Makes sure there are no null.
* To unset the parent, use the RemoveParent() method.
*/
public virtual void SetParent(MyOnScreenObject ParentObject)
{
if (ParentObject != null)
{
this.ParentObject = ParentObject;
}
}
public void AddChildAtLocation(MyOnScreenObject ChildObject, int x, int y)
{
if (ChildObject != null)
{
ChildObject.SetPosition(x, y);
AddChild(ChildObject);
}
}
/**
* Adds the referenced object to the list of child objects while
* also setting its parent object reference to this object
*/
public virtual void AddChild(MyOnScreenObject ChildObject)
{
if (ChildObject != null)
{
ChildObjects.Add(ChildObject);
ChildObject.SetParent(this);
}
}
/**
* Removes the referenced child from the list of child objects and
* sets its parent reference to null
*/
public virtual void RemoveChild(MyOnScreenObject ChildObject)
{
if (ChildObject != null)
{
ChildObjects.Remove(ChildObject);
ChildObject.RemoveParent();
}
}
public MyOnScreenObject(MyOnScreenObject ParentObject, int x, int y, bool isVisible)
{
this.SetParent(ParentObject);
this.x = x;
this.y = y;
this.isVisible = isVisible;
if (ParentObject != null)
{
ParentObject.AddChild(this);
}
}
public override void RemoveChild(MyOnScreenObject Item)
{
base.RemoveChild(Item);
if (Item == SelectedItem)
{
SetInitialSelectedItem(ChildObjects[0]);
UpdateScrollbarPosition();
}
Items.Remove(Item);
UpdateItemPositions();
}
public override void AddChild(MyOnScreenObject Item)
{
base.AddChild(Item);
if (SelectedItem == null)
{
SetInitialSelectedItem(Item);
UpdateScrollbarPosition();
}
Items.Add(Item);
UpdateItemPositions();
}
private int ComputeItemHorizontalPosition(MyOnScreenObject Item)
{
if (horizontalAlignment == Constants.HORIZONTAL_ALIGN_RIGHT)
{
return(GetWidth() - Scrollbar.GetWidth() - padding - Item.GetWidth());
}
else if (horizontalAlignment == Constants.HORIZONTAL_ALIGN_CENTER)
{
return((GetWidth() - Scrollbar.GetWidth() - Item.GetWidth()) / 2);
}
else
{
return(padding);
}
}
public MyOnScreenObject SelectPreviousItem()
{
if (SelectedItem != null)
{
selectedItemIndex = Items.IndexOf(SelectedItem); // if it doesn't work, use this: int index = myList.FindIndex(a => a.Prop == oProp);
if (selectedItemIndex > 0)
{
selectedItemIndex--;
SelectedItem = Items[selectedItemIndex];
UpdateItemPositions();
UpdateScrollbarPosition();
}
}
return(SelectedItem);
}
public MyOnScreenObject SelectNextItem()
{
if (SelectedItem != null)
{
selectedItemIndex = Items.IndexOf(SelectedItem); // if it doesn't work, use this: int index = myList.FindIndex(a => a.Prop == oProp);
if (selectedItemIndex >= 0 && selectedItemIndex < Items.Count() - 1)
{
selectedItemIndex++;
SelectedItem = Items[selectedItemIndex];
UpdateItemPositions();
UpdateScrollbarPosition();
}
}
return(SelectedItem);
}
private MySprite[] ResolveFont()
{
if (Font == null)
{
MyOnScreenObject TopLevelParent = GetTopLevelParent();
if (TopLevelParent is MyPage)
{
return(((MyPage)TopLevelParent).GetApplication().GetCanvas().GetDefaultFont());
}
else
{
return(null);
}
}
else
{
return(Font);
}
}
/**
* Removes the object's parent
*/
public void RemoveParent()
{
this.ParentObject = null;
}
public MyScrollbar(MyOnScreenObject ParentObject)
: base(ParentObject, 0, 0, true)
{
}
private void SetInitialSelectedItem(MyOnScreenObject Item)
{
SelectedItem = Item;
selectedItemIndex = 0;
startPosY = padding;
}