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There is a newer version: 2.3.0

package cn.mapway.ui.client.widget.common;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.regexp.shared.RegExp;
import com.google.gwt.user.client.ui.CheckBox;

/**
 * The type Check box ex.
 */
public class CheckBoxEx extends CheckBox implements IValidator {
    /**
     * Instantiates a new Check box ex.
     */
    public CheckBoxEx() {
        setStyleName("gwtEx-CheckBox");
        init();
    }

    private void init() {
        this.getElement().getStyle().setMargin(0, Unit.PX);
    }

    /**
     * 按钮的数据.
     */
    private Object data;

    /**
     * Instantiates a new Check box ex.
     *
     * @param name the name
     */
    public CheckBoxEx(String name) {
        super(name);
        init();
    }

    /**
     * Gets the data.
     *
     * @return the data
     */
    public Object getData() {
        return data;
    }

    /**
     * Sets the data.
     *
     * @param data the new data
     */
    public void setData(Object data) {
        this.data = data;
    }

    /**
     * Gets tag.
     *
     * @return the tag
     */
    public String getTag() {
        return tag;
    }

    /**
     * Sets tag.
     *
     * @param tag the tag
     */
    public void setTag(String tag) {
        this.tag = tag;
    }

    private String tag;

    private String msg = "";
    private RegExp regex = null;
    private boolean required = false;

    @Override
    public String getMessage() {
        return msg;
    }

    @Override
    public void setPattern(String pattern) {
        if (pattern != null && pattern.length() > 0) {
            regex = RegExp.compile(pattern);
        } else {
            regex = null;
        }
    }

    @Override
    public void setRequired(boolean b) {
        required = b;
    }

    @Override
    public boolean isValidate() {
        return true;
    }

    @Override
    public void setMessage(String msg) {
        this.msg = msg;
    }
}