com.github.a2g.core.objectmodel.LoaderPanel.java Source code

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Here is the source code for com.github.a2g.core.objectmodel.LoaderPanel.java

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/*
 * Copyright 2012 Anthony Cassidy
 *
 * 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.github.a2g.core.objectmodel;

import com.github.a2g.core.interfaces.LoaderPanelAPI;
import com.github.a2g.core.interfaces.MouseToLoaderPresenterAPI;
import com.github.a2g.core.primitive.ColorEnum;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.VerticalPanel;

public class LoaderPanel extends SimplePanel implements LoaderPanelAPI {

    Label progress;
    Button reload;
    Button clickToContinue;
    MouseToLoaderPresenterAPI api;
    private Grid containerGrid;
    private final int TOTAL_NUMBER_OF_CELLS = 36;
    private int lastNumberOfCellsFilled;

    public LoaderPanel(final MouseToLoaderPresenterAPI api, ColorEnum fore, ColorEnum back) {
        this.api = api;
        VerticalPanel layout = new VerticalPanel();
        {
            progress = new Label();

            progress.getElement().getStyle().setProperty("color", fore.toString());
            progress.getElement().getStyle().setProperty("backgroundColor", back.toString());

            progress.setText("Loading...");

            layout.add(progress);
        }
        {
            reload = new Button("Reload");
            layout.add(reload);
        }
        {
            clickToContinue = new Button("Click to continue");
            clickToContinue.setEnabled(false);
            layout.add(clickToContinue);
        }
        {
            // Initialize the progress elements
            containerGrid = new Grid(1, TOTAL_NUMBER_OF_CELLS);
            containerGrid.getElement().getStyle().setProperty("margin", "0px");
            containerGrid.getElement().getStyle().setProperty("border", "0px solid white");
            containerGrid.setCellPadding(0);
            containerGrid.setCellSpacing(0);

            for (int i = 0; i < TOTAL_NUMBER_OF_CELLS; i++) {
                Grid grid = new Grid(1, 1);
                grid.setHTML(0, 0, "");
                grid.getElement().getStyle().setProperty("width", "5px");
                grid.getElement().getStyle().setProperty("height", "15px");
                grid.getElement().getStyle().setProperty("margin", "1px");
                grid.getElement().getStyle().setProperty("background", "#eee");
                containerGrid.setWidget(0, i, grid);
            }

            layout.add(containerGrid);
        }
        addHandler(api);
        this.add(layout);

    }

    void addHandler(final MouseToLoaderPresenterAPI api) {
        reload.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                api.restartReloading();
            }
        });
        clickToContinue.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                api.clickToContinue();
            }
        });
    }

    @Override
    public void update(int current, int total, String name) {
        reload.setEnabled(true);
        clickToContinue.setEnabled(false);
        progress.setText(" " + current + "/" + total + " " + name);

        double percentage = current * 100.0 / total;
        {
            // Make sure we are error-tolerant
            if (percentage > 100)
                percentage = 100;
            if (percentage < 0)
                percentage = 0;

            // Set the internal variable
            int progress = (int) percentage;

            // Update the elements in the progress grid to
            // reflect the status
            int numberOfCellsFilled = (current == 1) ? 1 : (TOTAL_NUMBER_OF_CELLS - 1) * progress / 100 + 1;

            if (numberOfCellsFilled != lastNumberOfCellsFilled) {
                if (numberOfCellsFilled < lastNumberOfCellsFilled) {
                    for (int i = numberOfCellsFilled; i < lastNumberOfCellsFilled; i++) {
                        Grid grid = (Grid) containerGrid.getWidget(0, i);
                        if (grid != null) {
                            grid.getElement().getStyle().setProperty("background", "#eee");
                        }
                    }
                } else {
                    for (int i = lastNumberOfCellsFilled; i < numberOfCellsFilled; i++) {
                        Grid grid = (Grid) containerGrid.getWidget(0, i);
                        if (grid != null) {
                            grid.getElement().getStyle().setProperty("background", "blue");
                        }
                    }
                }
                lastNumberOfCellsFilled = numberOfCellsFilled;
            }
        }
    }

    @Override
    public void setScenePixelSize(int width, int height) {
        this.setSize("" + width + "px", "" + height + "px");
    }

    @Override
    public void enableClickToContinue() {
        reload.setEnabled(false);
        clickToContinue.setEnabled(true);
    }
}