89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
#include "ProgressBar.h"
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#include <QPainter>
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ProgressBar::ProgressBar(const QVector<Tick>& tickList, QWidget *parent) : QWidget(parent), mTickList(tickList) {
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setAttribute(Qt::WA_OpaquePaintEvent, true);
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mTimer = startTimer(30);
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}
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double ProgressBar::getDrawWidth(double value) {
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int n = mTickList.size();
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int i = 1;
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for(; i < n - 1; ++i) {
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double cur = mTickList[i].mValue;
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if(mValue < cur || qFuzzyCompare(mValue, cur)) {
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break;
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}
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}
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int lowerOffset = i - 1;
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int upperOffset = i;
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double lower = mTickList[lowerOffset].mValue;
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double upper = mTickList[upperOffset].mValue;
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double w_step = (double)QWidget::width()/(double)(n-1);
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double lastRate = qMax(0.0, (mValue - lower)/(upper - lower));
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double drawWidth = w_step * (lastRate + lowerOffset);
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QString ticks;
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for(Tick& tick : mTickList) {
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ticks.append(" " + QString::number(tick.mValue));
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}
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// qDebug() << QString("%1->[%2,%3] i=%4 n=%5 drawWidth:%6 width:%7 ticks:%8 w_step:%9 lastRate:%10")
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// .arg(mValue).arg(lower).arg(upper).arg(i).arg(n).arg(drawWidth).arg(width()).arg(ticks)
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// .arg(w_step).arg(lastRate);
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return drawWidth;
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}
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void ProgressBar::paintEvent(QPaintEvent *event) {
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QPainter painter(this);
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painter.setPen(Qt::NoPen);
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painter.fillRect(rect(), QApplication::style()->standardPalette().brush(QPalette::Window));
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painter.setPen(QPen(Qt::black));
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auto w = (double)QWidget::width();
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auto hh = (double)height()/2;
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int n = mTickList.size();
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int tickW = 1;
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double drawWidth = getDrawWidth(mValue);
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// 背景
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painter.fillRect(0, 0, drawWidth - tickW - 4, height()/2, Qt::black);
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int curX = 0;
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// 进度条
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while(curX + tickW + 4 < drawWidth){
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painter.fillRect(curX, 0, tickW, height()/2, Qt::gray);
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curX += tickW + (int)mTickSpaceW;
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}
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int lineY = (int)hh + 2;
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painter.fillRect(curX -(int)mTickSpaceW , 0, 4, lineY - 0, Qt::yellow);
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painter.drawLine(0, lineY , (int)w, lineY);
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// 画刻度
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QFont font;
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font.setBold(true);
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QFontMetrics fm(font);
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for(int i = 0; i < n; ++i){
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int tickX = (int)((double)(QWidget::width() * i)/(double)(n - 1));
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int textW = fm.horizontalAdvance( mTickList[i].mText);
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int textX;
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if(i == n - 1) {
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textX = tickX - textW;
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tickX -=1;
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} else if( i == 0) {
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textX = tickX;
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} else {
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textX = tickX - textW/2;
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}
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painter.setPen(Qt::black);
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painter.drawLine(tickX, lineY, tickX, (lineY + 5));
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painter.setPen(mTickList[i].mColor);
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painter.setFont(font);
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painter.drawText(QRectF(textX, lineY, textW, lineY), Qt::AlignCenter, mTickList[i].mText);
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}
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}
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void ProgressBar::timerEvent(QTimerEvent *event) {
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if(event->timerId() == mTimer) {
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if(mSetValue) mSetValue();
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update();
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}
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QObject::timerEvent(event);
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}
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