/// <summary>
/// Draw the sprite preview.
/// </summary>
public override void OnPreviewGUI(Rect rect, GUIStyle background)
{
UISprite sprite = target as UISprite;
if (sprite == null || !sprite.isValid)
{
return;
}
Texture2D tex = sprite.mainTexture as Texture2D;
if (tex == null)
{
return;
}
float interval = 10f;
float width = (rect.width - interval) / 2;
Rect leftRect = new Rect(rect.x, rect.y, width, rect.height);
Rect rightRect = new Rect(rect.x + width + interval, rect.y, width, rect.height);
UISpriteData sd = sprite.atlas.GetSprite(sprite.spriteName);
NGUIEditorTools.DrawAtlas(tex, leftRect, sd);
NGUIEditorTools.DrawSprite(tex, rightRect, sd, sprite.color);
//点选图片
Event e = Event.current;
if (e.type == EventType.MouseDown)
{
//下面函数通过点击的坐标，和texture、texture draw rect等信息计算出被点选的sprite
UISpriteData click = NGUIEditorTools.GetUISpriteData(tex, sprite.atlas, leftRect, e.mousePosition);
if (click != null)
{
sprite.spriteName = click.name;
EditorUtility.SetDirty(sprite);
}
}
}
