org.ednovo.gooru.client.mvp.image.upload.ImageCropView.java Source code

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Here is the source code for org.ednovo.gooru.client.mvp.image.upload.ImageCropView.java

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/*******************************************************************************
 * Copyright 2013 Ednovo d/b/a Gooru. All rights reserved.
 * 
 *  http://www.goorulearning.org/
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining
 *  a copy of this software and associated documentation files (the
 *  "Software"), to deal in the Software without restriction, including
 *  without limitation the rights to use, copy, modify, merge, publish,
 *  distribute, sublicense, and/or sell copies of the Software, and to
 *  permit persons to whom the Software is furnished to do so, subject to
 *  the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ******************************************************************************/
package org.ednovo.gooru.client.mvp.image.upload;

import org.ednovo.gooru.client.uc.BlueButtonUc;
import org.ednovo.gooru.client.uc.LoadingUc;
import org.ednovo.gooru.shared.util.MessageProperties;

import com.google.code.gwt.crop.client.GWTCropper;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.LoadHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Search Team
 *
 */
public abstract class ImageCropView extends Composite implements MessageProperties {

    @UiField
    Label backPageLinkLbl;

    @UiField
    FlowPanel cropImageWidgetFloPanel;

    @UiField
    BlueButtonUc cropImageBtn;

    @UiField
    Anchor cancelButtonAnr;

    @UiField
    VerticalPanel cropImageLoadingVerPanel;

    @UiField
    LoadingUc cropImageLoading;

    @UiField
    Label loadingTextLbl;

    @UiField
    HTML cropText, dragText;

    @UiField
    FlowPanel buttonContainer;

    private GWTCropper crop;

    private static ImageCropViewUiBinder uiBinder = GWT.create(ImageCropViewUiBinder.class);

    interface ImageCropViewUiBinder extends UiBinder<Widget, ImageCropView> {
    }

    /**
     * Class constructor
     */
    public ImageCropView() {
        super();
        initWidget(uiBinder.createAndBindUi(this));
        backPageLinkLbl.setText(GL1231);
        cropText.setHTML(GL1232);
        dragText.setHTML(GL1233);
        cropImageLoading.setLoadingText(GL1234);
        cropImageBtn.setText(GL1235);
        cancelButtonAnr.setText(GL0142);
        loadingTextLbl.setText(GL1236);
        cropImageLoadingVerPanel.setCellVerticalAlignment(cropImageLoading, HasVerticalAlignment.ALIGN_MIDDLE);
        buttonContainer.setVisible(true);
        loadingTextLbl.setVisible(false);
    }

    /**
     * Crop given image and add it to crop image widget
     * @param imageURL of the image , which is to be cropped. 
     */
    public void cropImage(String imageURL, float aspectRatio) {
        crop = new GWTCropper(imageURL);
        crop.setAspectRatio(aspectRatio);
        cropImageWidgetFloPanel.add(crop);
    }

    /**
     * @return height of cropped image
     */
    public String getSelectionHeight() {
        return String.valueOf(crop.getSelectionHeight());
    }

    /**
     * @return width of cropped image
     */
    public String getSelectionWidth() {
        return String.valueOf(crop.getSelectionWidth());
    }

    /**
     * @return x-coordinate of cropped image
     */
    public String getSelectionXCoordinate() {
        return String.valueOf(crop.getSelectionXCoordinate());
    }

    /**
     * @return y-coordinate of cropped image
     */
    public String getSelectionYCoordinate() {
        return String.valueOf(crop.getSelectionYCoordinate());
    }

    /**
     * Cancel crop event 
     * @param clickEvent instance of {@link ClickEvent}
     */
    @UiHandler("cancelButtonAnr")
    public void onClickCancelCrop(ClickEvent clickEvent) {
        onCancelCrop();
    }

    /**
     * Back to upload page
     * @param clickEvent instance of {@link ClickEvent}
     */
    @UiHandler("backPageLinkLbl")
    public void onClickBackToUpload(ClickEvent clickEvent) {
        onBackToUpload();
    }

    /**
     * Crop image 
     * @param clickEvent instance of {@link ClickEvent}
     */
    @UiHandler("cropImageBtn")
    public void onClickCrop(ClickEvent clickEvent) {
        buttonContainer.setVisible(false);
        loadingTextLbl.setVisible(true);
        onCrop();
    }

    public abstract void onCancelCrop();

    public abstract void onBackToUpload();

    public abstract void onCrop();

    public void addCanvasLoadHandler(LoadHandler handler) {
        crop.addCanvasLoadHandler(handler);
    }

}