com.badlogic.gdx.scenes.scene2d.utils.ArraySelection.java Source code

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Here is the source code for com.badlogic.gdx.scenes.scene2d.utils.ArraySelection.java

Source

package com.badlogic.gdx.scenes.scene2d.utils;

import java.util.Iterator;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.utils.Array;

/** A selection that supports range selection by knowing about the array of items being selected.
 * @author Nathan Sweet */
public class ArraySelection<T> extends Selection<T> {
    private Array<T> array;
    private boolean rangeSelect = true;

    public ArraySelection(Array<T> array) {
        this.array = array;
    }

    public void choose(T item) {
        if (item == null)
            throw new IllegalArgumentException("item cannot be null.");
        if (isDisabled)
            return;
        if (selected.size > 0 && rangeSelect && multiple
                && (Gdx.input.isKeyPressed(Keys.SHIFT_LEFT) || Gdx.input.isKeyPressed(Keys.SHIFT_RIGHT))) {
            int low = array.indexOf(getLastSelected(), false);
            int high = array.indexOf(item, false);
            if (low > high) {
                int temp = low;
                low = high;
                high = temp;
            }
            snapshot();
            if (!UIUtils.ctrl())
                selected.clear();
            for (; low <= high; low++)
                selected.add(array.get(low));
            if (fireChangeEvent())
                revert();
            cleanup();
            return;
        }
        super.choose(item);
    }

    public boolean getRangeSelect() {
        return rangeSelect;
    }

    public void setRangeSelect(boolean rangeSelect) {
        this.rangeSelect = rangeSelect;
    }

    /** Removes objects from the selection that are no longer in the items array. If {@link #getRequired()} is true and there is no
     * selected item, the first item is selected. */
    public void validate() {
        Array<T> array = this.array;
        if (array.size == 0) {
            clear();
            return;
        }
        for (Iterator<T> iter = items().iterator(); iter.hasNext();) {
            T selected = iter.next();
            if (!array.contains(selected, false))
                iter.remove();
        }
        if (required && selected.size == 0)
            set(array.first());
    }
}