vaadin-framework/client/src/main/java/com/vaadin/client/ui/VColorPicker.java

/*
 * Copyright 2000-2016 Vaadin Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.vaadin.client.ui;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.HTML;

/**
 * Client side implementation for ColorPicker.
 *
 * @since 7.0.0
 */
public class VColorPicker extends VButton implements ClickHandler {

    private String color = null;

    private boolean isOpen = false;

    private HTML colorIcon;

    @Override
    public void onClick(ClickEvent event) {
        super.onClick(event);

        setOpen(!isOpen);
    }

    /**
     * Set the color of the component, e.g. #ffffff
     *
     * @param color
     */
    public void setColor(String color) {
        this.color = color;
    }

    /**
     * Mark the popup opened/closed.
     *
     * @param open
     */
    public void setOpen(boolean open) {
        isOpen = open;
    }

    /**
     * Check the popup's marked state.
     *
     * @return true if the popup has been marked being open, false otherwise.
     */
    public boolean isOpen() {
        return isOpen;
    }

    /**
     * Update color icon to show the currently selected color.
     */
    public void refreshColor() {
        if (color != null) {

            if (colorIcon == null) {
                colorIcon = new HTML();
                colorIcon.setStylePrimaryName("v-colorpicker-button-color");
                wrapper.insertBefore(colorIcon.getElement(), captionElement);
            }

            // Set the color
            colorIcon.getElement().getStyle().setProperty("background", color);
        }
    }

}