/// <summary>
/// Displays a slider enabling the user to change the preview index.
/// </summary>
private void SectionPreviewIndexPanel()
{
// Start the index panel area.
float startX = _indentValue;
float startY = position.height - _previewIndexPanelHeight;
float width = position.width - 2 * _indentValue;
float height = _previewIndexPanelHeight;
_previewIndexPanel = new Rect(startX, startY, width, height);
GUILayout.BeginArea(_previewIndexPanel);
// Check which source camera is currently being used for preview, i.e. determine the preview index.
int previewIndex = -1;
int channel = 0;
while (channel < _registeredCallers.Count)
{
IPreviewCaller caller = _registeredCallers[channel];
if (caller != null)
{
previewIndex = caller.previewIndex;
break;
}
channel++;
}
// If the caller objects indicate that they use a preview index, display a slider to enable the user to modify it.
if (previewIndex > -1)
{
// Display a slider to enable the user to change the preview index.
string label = "Preview camera index: ";
string tooltip = "Index of the source camera to be used for preview.";
int newPreviewIndex = EditorGUILayout.IntSlider(new GUIContent(label, tooltip), previewIndex, 0, _previewMaxIndex);
// If the preview index was changed, notify the caller objects.
if (newPreviewIndex != previewIndex)
{
foreach (IPreviewCaller caller in _registeredCallers)
{
if (caller != null)
{
// Set the caller object with a new preview index.
caller.previewIndex = newPreviewIndex;
// Notify objects that the preview index has changed.
if (caller.onPreviewIndexChangeEvent != null)
{
caller.onPreviewIndexChangeEvent.Invoke();
}
// Mark the current scene as dirty.
if (!Application.isPlaying)
{
EditorSceneManager.MarkSceneDirty(EditorSceneManager.GetActiveScene());
}
}
}
}
}
// End the index panel area.
GUILayout.EndArea();
}
/// <summary>
/// Adds a caller to the lists.
/// </summary>
/// <param name="caller"></param> The caller to be added.
/// <param name="imageName"></param> The corresponding name, to be used later on as an identifier.
private void WindowAddCaller(IPreviewCaller caller, string imageName)
{
// Initialize the lists if needed.
WindowInitIfNeeded();
// If the caller is already in the lists, do not register it again.
int listIndex = _registeredCallerNames.IndexOf(imageName);
if (listIndex > -1 && (caller == _registeredCallers[listIndex]))
{
return;
}
// Register a new caller in the lists.
_registeredCallers.Add(caller);
_registeredCallerNames.Add(imageName);
_registeredTextures.Add(null);
// Repaint the window.
Repaint();
}
/// <summary>
/// Adds a preview caller to the list, enabling this caller object to provide an image for preview.
/// </summary>
/// <param name="caller"></param> The caller object wishing to display an image for preview.
/// <param name="imageName"></param> The name of the image that the caller wishes to register.
public static void AddCaller(IPreviewCaller caller, string imageName)
{
_instance.WindowAddCaller(caller, imageName);
}
