public override void Draw(Graphics.G2D.GdxSpriteBatch spriteBatch, float parentAlpha)
{
SliderStyle style = Style;
bool disabled = IsDisabled;
ISceneDrawable knob = (disabled && style.DisabledKnob != null) ? style.DisabledKnob : style.Knob;
ISceneDrawable bg = (disabled && style.DisabledBackground != null) ? style.DisabledBackground : style.Background;
ISceneDrawable knobBefore = (disabled && style.DisabledKnobBefore != null) ? style.DisabledKnobBefore : style.KnobBefore;
ISceneDrawable knobAfter = (disabled && style.DisabledKnobAfter != null) ? style.DisabledKnobAfter : style.KnobAfter;
Color color = Color;
float x = X;
float y = Y;
float width = Width;
float height = Height;
float knobHeight = (knob == null) ? 0 : knob.MinHeight;
float knobWidth = (knob == null) ? 0 : knob.MinWidth;
float value = VisualValue;
spriteBatch.Color = color.MultiplyAlpha(parentAlpha);
if (_vertical) {
bg.Draw(spriteBatch, x + (int)((width - bg.MinWidth) * .5f), y, bg.MinWidth, height);
float sliderPosHeight = height - (bg.TopHeight + bg.BottomHeight);
if (_min != _max) {
_sliderPos = (value - _min) / (_max - _min) * (sliderPosHeight - knobHeight);
_sliderPos = Math.Max(0, _sliderPos);
_sliderPos = Math.Min(sliderPosHeight - knobHeight, _sliderPos) + bg.BottomHeight;
}
float knobHeightHalf = knobHeight * .5f;
if (knobBefore != null)
knobBefore.Draw(spriteBatch, x + (int)((width - knobBefore.MinWidth) * .5f), y,
knobBefore.MinWidth, (int)(_sliderPos + knobHeightHalf));
if (knobAfter != null)
knobAfter.Draw(spriteBatch, x + (int)((width - knobAfter.MinWidth) * .5f), y + (int)(_sliderPos + knobHeightHalf),
knobAfter.MinWidth, height - (int)(_sliderPos + knobHeightHalf));
if (knob != null)
knob.Draw(spriteBatch, x + (int)((width - knobWidth) * .5f), (int)(y + _sliderPos), knobWidth, knobHeight);
}
else {
bg.Draw(spriteBatch, x, y + (int)((height - bg.MinHeight) * .5f), width, bg.MinHeight);
float sliderPosWidth = width - (bg.LeftWidth + bg.RightWidth);
if (_min != _max) {
_sliderPos = (value - _min) / (_max - _min) * (sliderPosWidth - knobWidth);
_sliderPos = Math.Max(0, _sliderPos);
_sliderPos = Math.Min(sliderPosWidth - knobWidth, _sliderPos) + bg.LeftWidth;
}
float knobWidthHalf = knobWidth * .5f;
if (knobBefore != null)
knobBefore.Draw(spriteBatch, x, y + (int)((height - knobBefore.MinHeight) * .5f),
(int)(_sliderPos + knobWidthHalf), knobBefore.MinHeight);
if (knobAfter != null)
knobAfter.Draw(spriteBatch, x + (int)(_sliderPos + knobWidthHalf), y + (int)((height - knobAfter.MinWidth) * .5f),
width - (int)(_sliderPos + knobWidthHalf), knobAfter.MinHeight);
if (knob != null)
knob.Draw(spriteBatch, (int)(x + _sliderPos), (int)(y + (height - knobHeight) * .5f), knobWidth, knobHeight);
}
}
