///<summary>calc a rect from given element width/height, gui/design size and GUIElementTransform</summary>
public static Rect CalcRect(float guiW, float guiH, GUIElementTransform tr)
{
float eleW = tr.size.x;
float eleH = tr.size.y;
float x = tr.offset.x;
float y = tr.offset.y;
if (tr.stretch == Stretch.Width) eleW = guiW;
if (tr.stretch == Stretch.Height) eleH = guiH;
if (tr.stretch == Stretch.Both) { eleW = guiW; eleH = guiH; }
else if (tr.stretch == Stretch.BothAspectRatio)
{
float aspect = eleW / eleH;
if (aspect < (guiW / guiH))
{ // image is tall
eleW = (guiH / eleH) * eleW;
eleH = guiH;
}
else
{ // image is wide
eleH = (guiW / eleW) * eleH;
eleW = guiW;
}
}
if (tr.xAlign == XAlign.Right) x = guiW - eleW - tr.offset.x;
else if (tr.xAlign == XAlign.Center) x = (guiW - eleW) * 0.5f + tr.offset.x;
if (tr.yAlign == YAlign.Bottom) y = guiH - eleH - tr.offset.y;
else if (tr.yAlign == YAlign.Middle) y = (guiH - eleH) * 0.5f + tr.offset.y;
return new Rect(x, y, eleW, eleH);
}
public static GUIElementTransform ElementTransformField(GUIElementTransform tr, string label=null, bool stretch=true, bool xalign=true, bool yalign=true, bool offset=true, bool size=true)
{
if (!string.IsNullOrEmpty(label)) { GUILayout.Label(label, EditorStyles.boldLabel); EditorGUILayout.Space(); }
if (stretch) tr.stretch = (GUIElementTransform.Stretch)EditorGUILayout.Popup("Stretch", (int)tr.stretch, System.Enum.GetNames(typeof(GUIElementTransform.Stretch)));
if (xalign) tr.xAlign = (GUIElementTransform.XAlign)EditorGUILayout.Popup("X-Align", (int)tr.xAlign, System.Enum.GetNames(typeof(GUIElementTransform.XAlign)));
if (yalign) tr.yAlign = (GUIElementTransform.YAlign)EditorGUILayout.Popup("Y-Align", (int)tr.yAlign, System.Enum.GetNames(typeof(GUIElementTransform.YAlign)));
if (offset) tr.offset = EditorGUILayout.Vector2Field("Offset", tr.offset);
if (size) tr.size = UniRPGEdGui.Vector2Field("Size", "width", "height", tr.size, 200);
return tr;
}
// ================================================================================================================
#region Helpers
public static Texture2D TextureWithTransformCheck(string label, Texture2D texture, GUIElementTransform tr, params GUILayoutOption[] options)
{
Texture2D prev = texture;
if (!string.IsNullOrEmpty(label)) texture = (Texture2D)EditorGUILayout.ObjectField(label, texture, typeof(Texture2D), false);
else texture = (Texture2D)EditorGUILayout.ObjectField(texture, typeof(Texture2D), false, options);
if (prev != texture)
{
if (texture)
{
tr.size.x = texture.width;
tr.size.y = texture.height;
}
else
{
tr.size.x = 0;
tr.size.y = 0;
}
}
return texture;
}
