Add a selector element (Cycler but it holds generic values)

src/main/java/com/minelittlepony/common/client/gui/element/Cycler.java

@@ -9,8 +9,6 @@
 /**
  * Represents a toggle button that switches between different
  * styles as you toggle through its different states.
- * <p>
- * "Iconic" here refers to how it uses an icon instead of text
  *
  * @author     Sollace
  *

src/main/java/com/minelittlepony/common/client/gui/element/Selector.java

@@ -0,0 +1,77 @@
+package com.minelittlepony.common.client.gui.element;
+
+import java.util.function.Function;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.common.client.gui.IField;
+import com.minelittlepony.common.client.gui.style.IMultiStyled;
+import com.minelittlepony.common.client.gui.style.Style;
+
+/**
+ * Represents a toggle button that switches between different
+ * values as you toggle through its different states.
+ *
+ * @author     Sollace
+ *
+ */
+public class Selector<T> extends Button implements IMultiStyled<Selector<T>>, IField<T, Selector<T>> {
+    private final Style defaultStyle;
+    private final T defaultValue;
+    private T value;
+
+    @NotNull
+    private IChangeCallback<T> action = IChangeCallback::none;
+
+    private final Function<T, Style> styleFunction;
+
+    public Selector(int x, int y, int width, int height, T value, Function<T, Style> styleFunction) {
+        super(x, y, width, height);
+        this.defaultValue = value;
+        this.value = value;
+        this.styleFunction = styleFunction;
+        this.defaultStyle = styleFunction.apply(value);
+        setStyle(this.defaultStyle);
+    }
+
+    @Override
+    public Selector<T> onChange(IChangeCallback<T> action) {
+        this.action = action;
+
+        return this;
+    }
+
+    @Override
+    public T getValue() {
+        return value;
+    }
+
+    @Override
+    public Selector<T> setValue(@Nullable T value) {
+        this.value = value == null ? defaultValue : value;
+        this.setStyle(styleFunction.apply(this.value));
+
+        return this;
+    }
+
+    /**
+     * Sets the styles to use for each state this toggle is able to be in.
+     * The number of styles here determines the number of possible states
+     * and the value is the index to the array of styles.
+     */
+    @Override
+    public Selector<T> setStyles(Style... styles) {
+        return this;
+    }
+
+    @Override
+    public Style[] getStyles() {
+        return new Style[] {getStyle()};
+    }
+
+    @Override
+    public void onPress() {
+        setValue(action.perform(getValue()));
+        super.onPress();
+    }
+}