testprogressbar.java

EclipseTrader is a stock exchange analysis system, featuring shares pricing watch, intraday and hi

/*
 * Copyright (c) 2004-2006 Marco Maccaferri and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Marco Maccaferri - initial API and implementation
 */

package net.sourceforge.eclipsetrader.trading.internal;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;

public class TestProgressBar extends Canvas
{
    private static final int DEFAULT_WIDTH = 160;
    private static final int DEFAULT_HEIGHT = 18;
    private int fCurrentTickCount = 0;
    private int fMaxTickCount = 0;
    private int fColorBarWidth = 0;
    private Color fOKColor;
    private Color fFailureColor;
    private Color fStoppedColor;
    private boolean fError;
    private boolean fStopped = false;

    public TestProgressBar(Composite parent)
    {
        super(parent, SWT.NONE);

        addControlListener(new ControlAdapter() {
            public void controlResized(ControlEvent e)
            {
                fColorBarWidth = scale(fCurrentTickCount);
                redraw();
            }
        });
        addPaintListener(new PaintListener() {
            public void paintControl(PaintEvent e)
            {
                paint(e);
            }
        });
        addDisposeListener(new DisposeListener() {
            public void widgetDisposed(DisposeEvent e)
            {
                fFailureColor.dispose();
                fOKColor.dispose();
                fStoppedColor.dispose();
            }
        });
        Display display = parent.getDisplay();
        fFailureColor = new Color(display, 159, 63, 63);
        fOKColor = new Color(display, 95, 191, 95);
        fStoppedColor = new Color(display, 120, 120, 120);
    }

    public void setMaximum(int max)
    {
        fMaxTickCount = max;
    }

    public void reset()
    {
        fError = false;
        fStopped = false;
        fCurrentTickCount = 0;
        fColorBarWidth = 0;
        fMaxTickCount = 0;
        redraw();
    }

    private void paintStep(int startX, int endX)
    {
        GC gc = new GC(this);
        setStatusColor(gc);
        Rectangle rect = getClientArea();
        startX = Math.max(1, startX);
        gc.fillRectangle(startX, 1, endX - startX, rect.height - 2);
        gc.dispose();
    }

    private void setStatusColor(GC gc)
    {
        if (fStopped)
            gc.setBackground(fStoppedColor);
        else if (fError)
            gc.setBackground(fFailureColor);
        else if (fStopped)
            gc.setBackground(fStoppedColor);
        else
            gc.setBackground(fOKColor);
    }

    public void stopped()
    {
        fStopped = true;
        redraw();
    }

    private int scale(int value)
    {
        if (fMaxTickCount > 0)
        {
            Rectangle r = getClientArea();
            if (r.width != 0)
                return Math.max(0, value * (r.width - 2) / fMaxTickCount);
        }
        return value;
    }

    private void drawBevelRect(GC gc, int x, int y, int w, int h, Color topleft, Color bottomright)
    {
        gc.setForeground(topleft);
        gc.drawLine(x, y, x + w - 1, y);
        gc.drawLine(x, y, x, y + h - 1);

        gc.setForeground(bottomright);
        gc.drawLine(x + w, y, x + w, y + h);
        gc.drawLine(x, y + h, x + w, y + h);
    }

    private void paint(PaintEvent event)
    {
        GC gc = event.gc;
        Display disp = getDisplay();

        Rectangle rect = getClientArea();
        gc.fillRectangle(rect);
        drawBevelRect(gc, rect.x, rect.y, rect.width - 1, rect.height - 1, disp.getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW), disp.getSystemColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));

        setStatusColor(gc);
        fColorBarWidth = Math.min(rect.width - 2, fColorBarWidth);
        gc.fillRectangle(1, 1, fColorBarWidth, rect.height - 2);
    }

    public Point computeSize(int wHint, int hHint, boolean changed)
    {
        checkWidget();
        Point size = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT);
        if (wHint != SWT.DEFAULT)
            size.x = wHint;
        if (hHint != SWT.DEFAULT)
            size.y = hHint;
        return size;
    }

    public void step(int failures)
    {
        fCurrentTickCount++;
        int x = fColorBarWidth;

        fColorBarWidth = scale(fCurrentTickCount);

        if (!fError && failures > 0)
        {
            fError = true;
            x = 1;
        }
        if (fCurrentTickCount == fMaxTickCount)
            fColorBarWidth = getClientArea().width - 1;
        paintStep(x, fColorBarWidth);
    }

    public void refresh(boolean hasErrors)
    {
        fError = hasErrors;
        redraw();
    }
}