62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
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#include "elescroll.h"
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#include <QJsonObject>
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#include <QPainter>
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#include <complex>
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EleScroll::EleScroll(QString dirPre, QJsonObject map, QWidget *parent) : QWidget{parent} {
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img.load(dirPre + map["id"].toString());
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QString effStr = map["effect"].toString();
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if(effStr.isNull() || effStr=="no") return;
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double effDurD = map["effectSpeed"].toInt()/2;
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if(effDurD==0) return;
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int idx = effStr.lastIndexOf(' ');
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if(idx > -1) {
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effect = effStr.at(idx+1);
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if(effect=='l') end = -(img.width()-1);
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else if(effect=='r') end = img.width()-1;
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else if(effect=='t') end = -(img.height()-1);
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else if(effect=='b') end = img.height()-1;
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}
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period = ceil(effDurD/16.666666)*16.666666;
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curAdd = ceil(period/effDurD);
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}
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void EleScroll::paintEvent(QPaintEvent *) {
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if(img.isNull()) return;
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if(timerId==0 && effect!=0 && period!=0) {
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cur = 0;
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timerId = startTimer(period, Qt::PreciseTimer);
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}
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QPainter painter(this);
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painter.setRenderHints(QPainter::Antialiasing|QPainter::SmoothPixmapTransform);
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if(effect=='l') {
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painter.drawPixmap(cur, 0, img);
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painter.drawPixmap(cur+img.width(), 0, img);
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} else if(effect=='r') {
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painter.drawPixmap(cur, 0, img);
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painter.drawPixmap(cur-img.width(), 0, img);
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} else if(effect=='t') {
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painter.drawPixmap(0, cur, img);
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painter.drawPixmap(0, cur+img.height(), img);
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} else if(effect=='b') {
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painter.drawPixmap(0, cur, img);
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painter.drawPixmap(0, cur-img.height(), img);
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} else painter.drawPixmap(0, 0, img);
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}
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void EleScroll::timerEvent(QTimerEvent *) {
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if(isVisible()) {
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if(effect=='t' || effect=='l') {
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if(cur <= end) cur = 0;
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else cur-=curAdd;
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} else if(effect=='b' || effect=='r') {
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if(cur >= end) cur = 0;
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else cur+=curAdd;
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}
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update();
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} else if(timerId!=0) {
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killTimer(timerId);
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timerId = 0;
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}
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}
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