com.googlecode.mgwt.ui.client.widget.base.PullArrowStandardHandler.java Source code

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Here is the source code for com.googlecode.mgwt.ui.client.widget.base.PullArrowStandardHandler.java

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/*
 * Copyright 2012 Daniel Kurka
 * 
 * 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.googlecode.mgwt.ui.client.widget.base;

import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.googlecode.mgwt.ui.client.widget.base.PullPanel.PullWidget;
import com.googlecode.mgwt.ui.client.widget.base.PullPanel.PullWidget.PullState;
import com.googlecode.mgwt.ui.client.widget.base.PullPanel.Pullhandler;

public class PullArrowStandardHandler implements Pullhandler {

    public interface PullActionHandler {
        public void onPullAction(AsyncCallback<Void> callback);
    }

    private final PullArrowWidget pullArrow;

    private String normalText;
    private String pulledText;
    private String errorText;
    private String loadingText;

    private boolean callRunning;

    private int errorTime = 1000;

    private PullActionHandler pullActionHandler;

    private final HasRefresh pullPanel;

    public PullArrowStandardHandler(PullArrowWidget pullArrow, HasRefresh pullPanel) {
        this.pullArrow = pullArrow;
        this.pullPanel = pullPanel;
        this.callRunning = false;
    }

    @Override
    public void onPullStateChanged(PullWidget pullWidget, PullState state) {
        switch (state) {
        case NORMAL:
            pullWidget.setHTML(normalText != null ? normalText : "");
            break;
        case PULLED:
            pullWidget.setHTML(pulledText != null ? pulledText : "");
            break;

        default:
            break;
        }

    }

    @Override
    public void onPullAction(PullWidget pullWidget) {
        if (pullActionHandler == null)
            return;

        if (callRunning)
            return;
        callRunning = true;
        pullWidget.setHTML(loadingText != null ? loadingText : "");

        pullArrow.showLoadingIndicator();

        pullActionHandler.onPullAction(new AsyncCallback<Void>() {

            @Override
            public void onFailure(Throwable caught) {
                pullArrow.showError();
                pullArrow.setHTML(errorText != null ? errorText : "");

                new Timer() {

                    @Override
                    public void run() {
                        callRunning = false;
                        pullPanel.refresh();

                        pullArrow.setHTML(normalText != null ? normalText : "");
                        pullArrow.showArrow();

                    }
                }.schedule(errorTime);

            }

            @Override
            public void onSuccess(Void result) {
                callRunning = false;
                pullArrow.setHTML(normalText != null ? normalText : "");
                pullArrow.showArrow();

            }
        });

    }

    public void setNormalText(String normalText) {
        this.normalText = normalText;
    }

    public void setPulledText(String pulledText) {
        this.pulledText = pulledText;
    }

    public void setLoadingText(String loadingText) {
        this.loadingText = loadingText;
    }

    public void setErrorText(String errorText) {
        this.errorText = errorText;
    }

    public void setErrorTime(int errorTime) {
        if (errorTime < 1) {
            throw new IllegalArgumentException();
        }
        this.errorTime = errorTime;
    }

    public void setPullActionHandler(PullActionHandler pullActionHandler) {
        this.pullActionHandler = pullActionHandler;
    }

}