89 lines
3.2 KiB
C++
89 lines
3.2 KiB
C++
#include "elescroll.h"
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#include "playwin.h"
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#include <QOpenGLWidget>
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#include <QPainter>
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#include <QPaintEvent>
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#include <QDebug>
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EleScroll::EleScroll(QWidget *parent, QList<QPixmap> imgs, char direct, double speed) : QWidget{parent}, imgs(imgs), direct(direct) {
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auto img0 = imgs[0];
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qDebug().nospace()<<" SrcScroll img cnt "<<imgs.size()<<", "<<img0.width()<<"x"<<img0.height()<<" direct "<<direct<<" speed "<<speed;
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if(speed==0) return;
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int width = 0, height = 0;
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for(auto &img : imgs) {
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width += img.width();
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height += img.height();
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}
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if(direct=='l') end = -(width-step);
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else if(direct=='r') end = width-step;
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else if(direct=='t') end = -(height-step);
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else if(direct=='b') end = height-step;
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else direct = 0;
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if(direct==0) return;
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interval = step = 1;
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if(speed > 60) step = (int) round(speed/60);
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else if(speed < 60) interval = (int) round(60/speed);
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}
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void EleScroll::paintEvent(QPaintEvent *e) {
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if(imgs.isEmpty()) return;
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auto rect = e->rect();
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QPainter painter(this);
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painter.setRenderHints(QPainter::Antialiasing|QPainter::SmoothPixmapTransform);
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if(direct=='l') {
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int ii = 0, x = cur;
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do {
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if(x > rect.left()-imgs[ii].width() && x < rect.right()+1) painter.drawPixmap(x, 0, imgs[ii]);
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x += imgs[ii].width();
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if(++ii >= imgs.size()) ii = 0;
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} while(x < rect.right()+1);
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} else if(direct=='r') {
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int ii = imgs.size()-1, x = cur + width();
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bool con1;
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do {
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x -= imgs[ii].width();
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con1 = x > rect.left()-imgs[ii].width();
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if(con1 && x < rect.right()+1) painter.drawPixmap(x, 0, imgs[ii]);
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if(--ii < 0) ii = imgs.size()-1;
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} while(con1);
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} else if(direct=='t') {
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int ii = 0, y = cur;
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do {
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if(y > rect.top()-imgs[ii].height() && y < rect.bottom()+1) painter.drawPixmap(0, y, imgs[ii]);
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y += imgs[ii].height();
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if(++ii >= imgs.size()) ii = 0;
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} while(y < rect.bottom()+1);
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} else if(direct=='b') {
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int ii = imgs.size()-1, y = cur + height();
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bool con1;
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do {
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y -= imgs[ii].height();
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con1 = y > rect.top()-imgs[ii].height();
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if(con1 && y < rect.bottom()+1) painter.drawPixmap(0, y, imgs[ii]);
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if(--ii < 0) ii = imgs.size()-1;
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} while(con1);
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} else painter.drawPixmap(0, 0, imgs[0]);
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if(freshCnt==0 && direct!=0 && interval!=0) connect(PlayWin::self->gl, &QOpenGLWidget::frameSwapped, this, &EleScroll::doFrame, Qt::UniqueConnection);
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}
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void EleScroll::doFrame() {
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if(! isVisible()) {
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freshCnt = cur = 0;
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disconnect(PlayWin::self->gl, &QOpenGLWidget::frameSwapped, this, &EleScroll::doFrame);
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return;
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}
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if(freshCnt < interval) freshCnt++;
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else {
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freshCnt = 1;
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if(direct=='t' || direct=='l') {
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if(cur <= end) cur -= end;
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else cur -= step;
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} else if(direct=='b' || direct=='r') {
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if(cur >= end) cur -= end;
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else cur += step;
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}
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update();
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}
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}
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