public override void OnPreviewGUI(Rect r, GUIStyle background)
{
_drag = CodeUtils.Drag2D(_drag, r);
var previewWidth = EditorGUIUtility.currentViewWidth - 10;
if (!_previewAll)
{
EditorGUILayout.BeginVertical(GUILayout.Width(previewWidth));
GUILayout.Label(string.Format("Show: {0}, {1}", currentPreviewIndex, _currentObjectToPreview.name), EditorStyles.whiteBoldLabel);
EditorGUILayout.BeginHorizontal(GUILayout.Width(previewWidth));
if (GUILayout.Button("Next"))
{
int newIndex = (_lastIndex + 1) % instance.AssociatedObjects.Count;
_currentObjectToPreview = instance.AssociatedObjects[newIndex];
_lastIndex = newIndex;
}
if (GUILayout.Button("Previous"))
{
var prev = ((_lastIndex - 1)) % instance.AssociatedObjects.Count;
int newIndex = prev >= 0 ? prev : instance.AssociatedObjects.Count + prev;
_currentObjectToPreview = instance.AssociatedObjects[newIndex];
_lastIndex = newIndex;
}
EditorGUILayout.EndHorizontal();
EditorGUILayout.BeginVertical();
}
if (Event.current.type == EventType.Repaint)
{
if (!instance.AssociatedObjects.Any())
{
EditorGUI.DropShadowLabel(r, "Has no objects!");
}
else
{
if (!_previewAll)
{
var resultTexture = RenderObjectPreview(r, _currentObjectToPreview, background);
RenderObjectOrError(r, _currentObjectToPreview.name, resultTexture);
}
else
{
var previewGrid = EstimatePreviewGrid(r, instance.AssociatedObjects.Count);
int rows = previewGrid.GetLength(0);
int cols = previewGrid.GetLength(1);
var objectIndex = 0;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
var currentObject = instance.AssociatedObjects[objectIndex];
var resultTexture = RenderObjectPreview(r, currentObject, background);
var currentPositionRect = previewGrid[i, j];
RenderObjectOrError(currentPositionRect, currentObject.name, resultTexture);
objectIndex++;
}
}
}
}
}
}