vaadin-framework/src/com/vaadin/terminal/gwt/client/ComponentState.java

/* 
@VaadinApache2LicenseForJavaFiles@
 */

package com.vaadin.terminal.gwt.client;

import com.vaadin.terminal.gwt.client.communication.SharedState;

/**
 * Default shared state implementation for UI components.
 * 
 * State classes of concrete components should extend this class.
 * 
 * @since 7.0
 */
public class ComponentState extends SharedState {
    private String height = "";
    private String width = "";

    /**
     * Returns the component height as set by the server.
     * 
     * Can be relative (containing the percent sign) or absolute, or empty
     * string for undefined height.
     * 
     * @return component height as defined by the server, not null
     */
    public String getHeight() {
        if (height == null) {
            return "";
        }
        return height;
    }

    /**
     * Sets the height of the component in the server format.
     * 
     * Can be relative (containing the percent sign) or absolute, or null or
     * empty string for undefined height.
     * 
     * @param height
     *            component height
     */
    public void setHeight(String height) {
        this.height = height;
    }

    /**
     * Returns true if the component height is undefined, false if defined
     * (absolute or relative).
     * 
     * @return true if component height is undefined
     */
    public boolean isUndefinedHeight() {
        return "".equals(getHeight());
    }

    /**
     * Returns the component width as set by the server.
     * 
     * Can be relative (containing the percent sign) or absolute, or empty
     * string for undefined height.
     * 
     * @return component width as defined by the server, not null
     */
    public String getWidth() {
        if (width == null) {
            return "";
        }
        return width;
    }

    /**
     * Sets the width of the component in the server format.
     * 
     * Can be relative (containing the percent sign) or absolute, or null or
     * empty string for undefined width.
     * 
     * @param width
     *            component width
     */
    public void setWidth(String width) {
        this.width = width;
    }

    /**
     * Returns true if the component width is undefined, false if defined
     * (absolute or relative).
     * 
     * @return true if component width is undefined
     */
    public boolean isUndefinedWidth() {
        return "".equals(getWidth());
    }

    // TODO more fields to move here: style, readonly, immediate, disabled,
    // caption and description

}