QTfrontend/ui/widget/bgwidget.cpp
author unc0rr
Sun, 02 Dec 2012 01:25:11 +0400
changeset 8178 8bd087478b48
parent 6952 7f70f37bbf08
child 8393 85bd6c7b2641
permissions -rw-r--r--
Fix QSettings problems: - Reopen file in ReadOnly mode if it was open in ReadWrite mode and is being read. This is needed for stupid QSettings which opens file in ReadWrite mode just to call readAll() on it. - Implement setSize(0)

/*
 * Hedgewars, a free turn based strategy game
 * Copyright (c) 2009 Kristian Lehmann <email@thexception.net>
 * Copyright (c) 2004-2012 Andrey Korotaev <unC0Rr@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include "bgwidget.h"
#include "hwconsts.h"

SpritePosition::SpritePosition(QWidget * parent, int sw, int sh)
{
    wParent = parent;
    iSpriteWidth = sw;
    iSpriteHeight = sh;
    reset();
}

SpritePosition::~SpritePosition()
{
}

void SpritePosition::move()
{
    fX += fXMov;
    fY += fYMov;
    iAngle += 4;
    if (iAngle >= 360) iAngle = 0;
    if ((fX - fXMov) > wParent->width()) reset();
    else if ((fY - fYMov) > wParent->height()) reset();
}

void SpritePosition::reset()
{
    // random movement values
    fYMov = ((qrand() % 400)+300) / 100.0f;
    fXMov = fYMov * 0.2f+((qrand()%100)/100.0f * 0.6f); //so between 0.2 and 0.8, or 0.5 +/- 0.3

    // random respawn locations
    int tmp = fXMov * (wParent->height() / fYMov);
    fX = (qrand() % (wParent->width() + tmp)) - tmp;

    // adjust respawn location to be next to (but outside) the parent's limits
    if (fX > -iSpriteWidth)
    {
        fY = -1 * iSpriteHeight;
    }
    else
    {
        fY = qrand() % wParent->height();
        fX = -iSpriteWidth;
    }

    // random initial angle
    iAngle = qrand() % 360;
}

QPoint SpritePosition::pos()
{
    return QPoint((int)fX,(int)fY);
}

int SpritePosition::getAngle()
{
    return iAngle;
}

void SpritePosition::init()
{
    fY = qrand() % (wParent->height() + 1);
    fX = qrand() % (wParent->width() + 1);
}

BGWidget::BGWidget(QWidget * parent) : QWidget(parent), enabled(false)
{
    setAttribute(Qt::WA_NoSystemBackground, true);

    QString fname;

    //For each season, there is a replacement for the star (Star.png)
    //Todo: change element for easter and birthday
    //Simply replace Confetti.png and Egg.png with an appropriate graphic)
    switch (season)
    {
        case SEASON_CHRISTMAS :
            fname = "Flake.png";
            break;
        case SEASON_EASTER :
            fname = "Egg.png";
            break;
        case SEASON_HWBDAY :
            fname = "Confetti.png";
            break;
        default :
            fname = "Star.png";
    }

    sprite.load(":/res/" + fname);

    setAutoFillBackground(false);

    for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i] = new SpritePosition(this, sprite.width(), sprite.height());

    for (int i = 0; i < 90; i++)
    {
        rotatedSprites[i] = new QImage(sprite.width(), sprite.height(), QImage::Format_ARGB32);
        rotatedSprites[i]->fill(0);

        QPoint translate(sprite.width()/2, sprite.height()/2);

        QPainter p;
        p.begin(rotatedSprites[i]);
        //  p.setRenderHint(QPainter::Antialiasing);
        p.setRenderHint(QPainter::SmoothPixmapTransform);
        p.translate(translate.x(), translate.y());
        p.rotate(4 * i);
        p.translate(-1*translate.x(), -1*translate.y());
        p.drawImage(0, 0, sprite);
    }

    timerAnimation = new QTimer();
    connect(timerAnimation, SIGNAL(timeout()), this, SLOT(animate()));
    timerAnimation->setInterval(ANIMATION_INTERVAL);
}

BGWidget::~BGWidget()
{
    for (int i = 0; i < SPRITE_MAX; i++) delete spritePositions[i];
    for (int i = 0; i < 90; i++) delete rotatedSprites[i];
    delete timerAnimation;
}

void BGWidget::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);
    if (!enabled)
        return;

    QPainter p;

    p.begin(this);

    for (int i = 0; i < SPRITE_MAX; i++)
    {
        QPoint point = spritePositions[i]->pos();
        p.drawImage(point.x(), point.y(), *rotatedSprites[spritePositions[i]->getAngle()/4]);
    }

    p.end();
}

void BGWidget::animate()
{
    if (!enabled)
        return;

    for (int i = 0; i < SPRITE_MAX; i++)
    {
        QPoint oldPos = spritePositions[i]->pos();
        spritePositions[i]->move();
        QPoint newPos = spritePositions[i]->pos();

        int xdiff = newPos.x() - oldPos.x();
        int ydiff = newPos.y() - oldPos.y();
        update(oldPos.x(), oldPos.y(), xdiff+sprite.width(), ydiff+sprite.height());
    }
}

void BGWidget::startAnimation()
{
    timerAnimation->start();
}

void BGWidget::stopAnimation()
{
    timerAnimation->stop();
    repaint();
}

void BGWidget::init()
{
    for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i]->init();
}