tv.dyndns.kishibe.qmaclone.client.game.input.InputWidgetClick.java Source code

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Here is the source code for tv.dyndns.kishibe.qmaclone.client.game.input.InputWidgetClick.java

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//The MIT License
//
//Copyright (c) 2009 nodchip
//
//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 tv.dyndns.kishibe.qmaclone.client.game.input;

import tv.dyndns.kishibe.qmaclone.client.constant.Constant;
import tv.dyndns.kishibe.qmaclone.client.game.AnswerView;
import tv.dyndns.kishibe.qmaclone.client.game.SessionData;
import tv.dyndns.kishibe.qmaclone.client.game.click.MarkedCanvas;
import tv.dyndns.kishibe.qmaclone.client.game.panel.QuestionPanel;
import tv.dyndns.kishibe.qmaclone.client.geom.Point;
import tv.dyndns.kishibe.qmaclone.client.packet.PacketProblem;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.MouseDownEvent;
import com.google.gwt.event.dom.client.MouseDownHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;

public class InputWidgetClick extends InputWidget implements MouseDownHandler, ClickHandler {
    private static InputWidgetClick INSTANCE = null;
    private boolean throughClick = false;
    private MarkedCanvas canvas;
    private final Button buttonOk = new Button("OK", this);
    private Point clickPosition;
    private int circleMarkId = MarkedCanvas.REGISTER;
    private final Image image;

    /**
     * ????
     * 
     * @return??????????null
     */
    public static Point getCanvasOffset() {
        if (INSTANCE == null || INSTANCE.image == null) {
            return null;
        }
        return new Point(INSTANCE.image.getAbsoluteLeft(), INSTANCE.image.getAbsoluteTop());
    }

    public InputWidgetClick(PacketProblem problem, AnswerView answerView, QuestionPanel questionPanel,
            SessionData sessionData) {
        super(problem, answerView, questionPanel, sessionData);

        HorizontalPanel panel = new HorizontalPanel();
        panel.setVerticalAlignment(ALIGN_MIDDLE);

        image = new Image(problem.getClickImageUrl());
        image.setPixelSize(Constant.CLICK_IMAGE_WIDTH, Constant.CLICK_IMAGE_HEIGHT);
        panel.add(image);

        buttonOk.setStyleName("gwt-Button-clickControl");
        panel.add(buttonOk);

        canvas = new MarkedCanvas(image, Constant.CLICK_IMAGE_WIDTH, Constant.CLICK_IMAGE_HEIGHT);
        canvas.addMouseDownHandler(this);

        add(panel);
    }

    public void enable(boolean b) {
        throughClick = !b;
        buttonOk.setEnabled(b);
    }

    public Point getImageOffset() {
        int x = image.getAbsoluteLeft();
        int y = image.getAbsoluteTop();
        return new Point(x, y);
    }

    @Override
    public void onMouseDown(MouseDownEvent event) {
        if (throughClick) {
            return;
        }

        int x = event.getX();
        int y = event.getY();
        clickPosition = new Point(x, y);
        if (canvas != null) {
            circleMarkId = canvas.addPointerMark(x, y, circleMarkId);
            canvas.update();
        }
    }

    @Override
    public void onClick(ClickEvent event) {
        Object sender = event.getSource();
        if (sender == buttonOk) {
            sendAnswer(clickPosition != null ? (clickPosition.x + " " + clickPosition.y) : "");
        }
    }

    @Override
    protected void hideAnswer() {
        super.hideAnswer();
        // ??WidgetPlayerList?????MarkedCanvas??
        if (canvas != null) {
            canvas.hide();
            canvas = null;
        }
    }

    @Override
    protected void onLoad() {
        super.onLoad();
        // ???????show(?
        if (canvas != null) {
            canvas.show();
        }
        INSTANCE = this;
    }

    @Override
    protected void onUnload() {
        INSTANCE = null;

        // BugTrack-QMAClone/575 - QMAClone wiki
        // http://kishibe.dyndns.tv/qmaclone/wiki/wiki.cgi?page=BugTrack%2DQMAClone%2F575
        if (canvas != null) {
            canvas.hide();
            canvas = null;
        }

        super.onUnload();
    }
}