I am working on a custom editor for a heirarchy of military unit structure. For each subunit of a given unit I display a new line in the list and indent it by the depth of the unit in the structure. You can see that in the image for more clarity.
I am noticing a behavior with EditorGUILayout.BeginHorizontal() where after applying a certain amount of space on a line there is extra vertical space occuring like something is trying to wrap because of the ‘indent’. However, the furthest right thing in the horizontal layout is a GUILayout.FlexibleSpace(). I can’t for the life of me find out what is causing the extra padding. When I reduce the indent amount added per line it works as expected with nothing extra vertically. I can determine based on the level and indent added per level that the Space() value is 40.
Here is a simplified script with the EditorGUILayout/GUILayout calls being made. Also note that the call is recursive to handle the subordinate units.
private void UnitLine(string parent, string unit, int level)
{
var unitComp = _unitMap[unit];
EGL.BeginHorizontal(GL.ExpandWidth(true));
EGL.Space(level * 10);
EGL.BeginHorizontal(GUI.skin.box, GL.ExpandHeight(false), GL.ExpandWidth(true));
var doFoldout = _foldoutOpen.GetValueOrDefault(unit, false);
_foldoutOpen[unit] = EGL.Foldout(doFoldout, "");
if (GL.Button("E"))
{
_activeEditUnit = unit;
}
if (GL.Button("S"))
{
var newUnit = new UnitComposition
{
Id = Guid.NewGuid().ToString()
};
_unitMap[newUnit.Id] = newUnit;
_foldoutOpen[newUnit.Id] = false;
if (unitComp.Subordinates == null)
{
unitComp.Subordinates = new List<string>();
}
unitComp.Subordinates.Add(newUnit.Id);
_fs.Units.Add(newUnit);
}
if (GL.Button("D"))
{
_markedForDelete = unit;
_markedForDeleteParent = parent;
}
GL.Space(10);
EGL.LabelField($"Name: {unitComp.Name}", GL.ExpandWidth(false));
GL.FlexibleSpace();
EGL.EndHorizontal();
EGL.EndHorizontal();
EGL.Space(3);
if (unitComp.Subordinates is not {Count: > 0} || !_foldoutOpen.ContainsKey(unit) || !_foldoutOpen[unit]) return;
level++;
foreach (var subordinate in unitComp.Subordinates)
{
UnitLine(unit, subordinate, level);
}
}
