SliderVertical.java

package cofh.lib.gui.element.listbox;

import cofh.lib.gui.GuiBase;
import cofh.lib.gui.element.ElementSlider;

public class SliderVertical extends ElementSlider {

	public SliderVertical(GuiBase containerScreen, int x, int y, int width, int height, int maxValue) {

		this(containerScreen, x, y, width, height, maxValue, 0);
	}

	public SliderVertical(GuiBase containerScreen, int x, int y, int width, int height, int maxValue, int minValue) {

		super(containerScreen, x, y, width, height, maxValue, minValue);
		int dist = maxValue - minValue;
		setSliderSize(width, dist <= 0 ? height : Math.max(height / ++dist, 9));
	}

	@Override
	public int getSliderY() {

		int dist = _valueMax - _valueMin;
		int maxPos = sizeY - _sliderHeight + 1;
		return Math.min(dist == 0 ? 0 : maxPos * (_value - _valueMin) / dist, maxPos);
	}

	@Override
	public void dragSlider(int x, int v) {

		v += Math.round(_sliderHeight * (v / (float) sizeY) + (_sliderHeight * 0.25f));
		setValue(_valueMin + ((_valueMax - _valueMin) * v / sizeY));
	}
}