public void OnGUI()
{
Event guiEvent = Event.current;
Rect gradientPreviewRect = new Rect(borderSize, borderSize, position.width - borderSize * 2, 25);
GUI.DrawTexture(gradientPreviewRect, gradient.GetTexture((int)gradientPreviewRect.width, (int)gradientPreviewRect.height));
for (int i = 0; i < gradient.NumKeys(); i++)
{
CustomGradient.ColourKey key = gradient.GetKey(i);
Rect keyRect = new Rect(gradientPreviewRect.x + gradientPreviewRect.width * key.Time - keyWidth / 2f, gradientPreviewRect.yMax + borderSize, keyWidth, keyHeight);
EditorGUI.DrawRect(keyRect, key.Colour);
}
if (guiEvent.type == EventType.MouseDown && guiEvent.button == 0)
{
Color randomColor = new Color(Random.value, Random.value, Random.value);
float keyTime = Mathf.InverseLerp(gradientPreviewRect.x, gradientPreviewRect.xMax, guiEvent.mousePosition.x);
gradient.AddKey(randomColor, keyTime);
Repaint();
}
}