public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
{
int rows = property.FindPropertyRelative("_rows").intValue;
SetCols(property);
Layout.Builder builder = new Layout.Builder();
builder.Orientation(LayoutOrientation.Vertical);
builder.PushChild(new LayoutChild(LayoutMargin.Bottom()));
builder.PushChild(new LayoutChild(LayoutMargin.Bottom()));
for (int i = -1; i < rows; i++)
{
builder.PushChild(new LayoutChild(LayoutMargin.Bottom()));
}
Layout layout = builder.Compile(position);
property.isExpanded = EditorGUI.Foldout(layout.Next(), property.isExpanded, label);
if (property.isExpanded)
{
EditorGUI.indentLevel++;
// Check for change, and add GUI for adjusting rows and cols
EditorGUI.BeginChangeCheck();
OnGUIRowsAndCols(layout, property);
// If rows or columns change, adjust the property's data array
if (EditorGUI.EndChangeCheck())
{
AdjustPropertyArray(property);
}
// If the matrix has some rows and columns, render it
if (rows > 0 && cols > 0)
{
OnGUIMatrix(layout, property);
}
EditorGUI.indentLevel--;
}
EditorGUIExt.EndLayout();
}