QTfrontend/ui/widget/bgwidget.cpp
author koda
Mon, 01 Jun 2015 14:39:25 +0200
branch0.9.20
changeset 9934 57f9ce8b2854
parent 9080 9b42757d7e71
child 9998 736015b847e3
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2009 Kristian Lehmann <email@thexception.net>
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 * Copyright (c) 2004-2013 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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#include "bgwidget.h"
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#include "hwconsts.h"
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SpritePosition::SpritePosition(QWidget * parent, int sw, int sh)
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{
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    wParent = parent;
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    iSpriteWidth = sw;
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    iSpriteHeight = sh;
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    reset();
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}
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SpritePosition::~SpritePosition()
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{
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}
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void SpritePosition::move()
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{
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    fX += fXMov;
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    fY += fYMov;
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    iAngle += 4;
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    if (iAngle >= 360) iAngle = 0;
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    if ((fX - fXMov) > wParent->width()) reset();
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    else if ((fY - fYMov) > wParent->height()) reset();
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}
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void SpritePosition::reset()
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{
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    // random movement values
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    fYMov = ((qrand() % 400)+300) / 100.0f;
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    fXMov = fYMov * 0.2f+((qrand()%100)/100.0f * 0.6f); //so between 0.2 and 0.8, or 0.5 +/- 0.3
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    // random respawn locations
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    int tmp = fXMov * (wParent->height() / fYMov);
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    fX = (qrand() % (wParent->width() + tmp)) - tmp;
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    // adjust respawn location to be next to (but outside) the parent's limits
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    if (fX > -iSpriteWidth)
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    {
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        fY = -1 * iSpriteHeight;
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    }
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    else
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    {
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        fY = qrand() % wParent->height();
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        fX = -iSpriteWidth;
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    }
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    // random initial angle
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    iAngle = qrand() % 360;
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}
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QPoint SpritePosition::pos()
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{
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    return QPoint((int)fX,(int)fY);
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}
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int SpritePosition::getAngle()
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{
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    return iAngle;
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}
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void SpritePosition::init()
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{
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    fY = qrand() % (wParent->height() + 1);
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    fX = qrand() % (wParent->width() + 1);
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}
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BGWidget::BGWidget(QWidget * parent) : QWidget(parent), enabled(false)
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{
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    setAttribute(Qt::WA_NoSystemBackground, true);
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    QString fname;
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    //For each season, there is a replacement for the star (Star.png)
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    //Todo: change element for easter and birthday
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    //Simply replace Confetti.png and Egg.png with an appropriate graphic)
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    switch (season)
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    {
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        case SEASON_CHRISTMAS :
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            fname = "Flake.png";
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            break;
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        case SEASON_EASTER :
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            fname = "Egg.png";
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            break;
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        case SEASON_HWBDAY :
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            fname = "Confetti.png";
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            break;
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        default :
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            fname = "Star.png";
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    }
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    sprite.load(":/res/" + fname);
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    setAutoFillBackground(false);
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    for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i] = new SpritePosition(this, sprite.width(), sprite.height());
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    for (int i = 0; i < 90; i++)
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    {
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        rotatedSprites[i] = new QImage(sprite.width(), sprite.height(), QImage::Format_ARGB32);
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        rotatedSprites[i]->fill(0);
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        QPoint translate(sprite.width()/2, sprite.height()/2);
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        QPainter p;
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        p.begin(rotatedSprites[i]);
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        //  p.setRenderHint(QPainter::Antialiasing);
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        p.setRenderHint(QPainter::SmoothPixmapTransform);
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        p.translate(translate.x(), translate.y());
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        p.rotate(4 * i);
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        p.translate(-1*translate.x(), -1*translate.y());
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        p.drawImage(0, 0, sprite);
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    }
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    timerAnimation = new QTimer();
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    connect(timerAnimation, SIGNAL(timeout()), this, SLOT(animate()));
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    timerAnimation->setInterval(ANIMATION_INTERVAL);
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}
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BGWidget::~BGWidget()
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{
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    for (int i = 0; i < SPRITE_MAX; i++) delete spritePositions[i];
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    for (int i = 0; i < 90; i++) delete rotatedSprites[i];
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    delete timerAnimation;
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}
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void BGWidget::paintEvent(QPaintEvent *event)
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{
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    Q_UNUSED(event);
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    if (!enabled)
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        return;
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    QPainter p;
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    p.begin(this);
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    for (int i = 0; i < SPRITE_MAX; i++)
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    {
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        QPoint point = spritePositions[i]->pos();
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        p.drawImage(point.x(), point.y(), *rotatedSprites[spritePositions[i]->getAngle()/4]);
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    }
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    p.end();
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}
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void BGWidget::animate()
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{
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    if (!enabled)
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        return;
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    for (int i = 0; i < SPRITE_MAX; i++)
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    {
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        QPoint oldPos = spritePositions[i]->pos();
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        spritePositions[i]->move();
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        QPoint newPos = spritePositions[i]->pos();
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        int xdiff = newPos.x() - oldPos.x();
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        int ydiff = newPos.y() - oldPos.y();
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        update(oldPos.x(), oldPos.y(), xdiff+sprite.width(), ydiff+sprite.height());
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    }
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    //repaint(); // Repaint every frame. Prevents ghosting of widgets if widgets resize in runtime.
2012
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}
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void BGWidget::startAnimation()
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{
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    timerAnimation->start();
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}
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void BGWidget::stopAnimation()
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{
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    timerAnimation->stop();
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    repaint();
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}
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void BGWidget::init()
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{
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    for (int i = 0; i < SPRITE_MAX; i++) spritePositions[i]->init();
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}