com.risevision.ui.client.common.widgets.ActionsWidget.java Source code

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Here is the source code for com.risevision.ui.client.common.widgets.ActionsWidget.java

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// Copyright  2010 - May 2014 Rise Vision Incorporated.
// Use of this software is governed by the GPLv3 license
// (reproduced in the LICENSE file).

package com.risevision.ui.client.common.widgets;

import java.util.HashMap;
import java.util.Map;

import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.ButtonBase;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.PushButton;

public class ActionsWidget extends HorizontalPanel implements ClickHandler {
    private static ActionsWidget instance;
    /*
     * Be careful with saving UI components in datastructures like this: if you
     * remove a button from the app, make sure you also remove its reference
     * from buttonMap HashMap to avoid memory leaks.
     */
    private Map<ButtonBase, Command> buttonMap = new HashMap<ButtonBase, Command>();

    public static ActionsWidget getInstance() {
        try {

            if (instance == null)
                instance = new ActionsWidget();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return instance;
    }

    public ActionsWidget() {
        this.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
    }

    public void addAction(String imageUrl, String title, Command command) {
        Image image = new Image(imageUrl);
        image.setHeight("22px");
        image.setWidth("22px");

        PushButton button = new PushButton(image);

        button.addClickHandler(this);
        button.setTitle(title);

        button.getElement().setClassName("simple-PushButton");

        addButton(button);
        buttonMap.put(button, command);
    }

    public void addAction(String text, Command command) {
        Button button = new Button("<span style='white-space:nowrap;'>" + text + "</span>");
        button.addClickHandler(this);

        addButton(button);
        buttonMap.put(button, command);
    }

    public void addAction(ButtonBase button) {
        addButton(button);
        buttonMap.put(button, null);
    }

    private void addButton(ButtonBase button) {
        if (buttonMap.size() != 0) {
            button.getElement().getStyle().setMarginLeft(6, Unit.PX);
        }
        add(button);
    }

    public void clearActions() {
        buttonMap.clear();
        clear();
    }

    public void setEnabled(boolean enabled) {
        for (ButtonBase button : buttonMap.keySet()) {
            button.setEnabled(enabled);
        }
    }

    public void setEnabled(boolean enabled, String text) {
        for (ButtonBase button : buttonMap.keySet()) {
            if (button.getText().equals(text))
                button.setEnabled(enabled);
        }
    }

    public void setVisible(boolean visible, String text) {
        for (ButtonBase button : buttonMap.keySet()) {
            if (button.getText().equals(text))
                button.setVisible(visible);
        }
    }

    // The shared ClickHandler code.
    public void onClick(ClickEvent event) {
        Object sender = event.getSource();
        if (sender instanceof ButtonBase) {
            ButtonBase b = (ButtonBase) sender;
            Command command = buttonMap.get(b);
            if (command != null) {
                command.execute();
            }
        }
    }
}