基于Qt绘制的水平时间轴控件

#include "TimeLineItem.h" #include <QPainter> #include <QDateTime> #include "private/TimeLineItem_p.h" #include <QMouseEvent> #include <QApplication> framework::core::gui::TimeLineItem::TimeLineItem(): d_ptr(new framework::core::gui::TimeLineItemPrivate) { Q_D(TimeLineItem); d->m_curDate = QDateTime::currentDateTime(); d->m_curDate = QDateTime::fromString("2019-09-25 23:23:43","yyyy-MM-dd hh:mm:ss"); d->m_scale = 80; } void framework::core::gui::TimeLineItem::paint(QPainter *p, const QStyleOptionGraphicsItem *item, QWidget *widget) { Q_D(TimeLineItem); QRect v = boundingRect().toRect(); QPen pen = p->pen(); pen.setColor(QColor("#1296DB")); pen.setWidth(1); // p->setPen(QColor("#1296DB")); p->setPen(pen); p->setRenderHint(QPainter::Antialiasing,true); p->drawLine(-v.width()/2, 0, v.width()/2 , 0); p->drawLine(0, -v.height()/2, 0 , v.height()/2); drawCalibration(p); p->drawText(-v.width()/2 +10,-v.height()/2+10,"time:"+d->m_curDate.toString("yyyy-MM-dd hh:mm:ss")); p->drawText(-v.width()/2 +10,-v.height()/2+30,"scale:"+QString::number(d->m_scale)); } void framework::core::gui::TimeLineItem::drawCalibration(QPainter *p) { Q_D(TimeLineItem); QRect rect = boundingRect().toRect(); // 绘制时间轴刻度 if(d->m_scale >= 75) { //分 d->m_uint = cluHour; d->m_left_date = cal_unit_time(d->m_uint); } else if(d->m_scale >= 50 && d->m_scale < 75) { d->m_uint = cluDay; d->m_left_date = cal_unit_time(d->m_uint); } else if(d->m_scale >= 25 && d->m_scale < 50) { d->m_uint = cluMonth; d->m_left_date = cal_unit_time(d->m_uint); } else if(d->m_scale <25) { d->m_uint = cluYear; d->m_left_date = cal_unit_time(d->m_uint); } int x_scale = (d->m_scale%25 + 1) * 20; // 每个刻度之间的距离像素 //向左绘制刻度 d->m_left = cal_left_time_to_cur(x_scale,d->m_left_date,d->m_uint); int x_l = d->m_left; int x_r = d->m_left + x_scale ; while(1) { if(x_l < -rect.width()/2 - 50) { break; } drawChildCalibration(p,x_l,x_l-x_scale); drawText(p, x_l); x_l -= x_scale; } drawChildCalibration(p,d->m_left,d->m_left + x_scale); while(1) { if(x_r > rect.width()/2 + 50) break; drawChildCalibration(p,x_r,x_r+x_scale); drawText(p,x_r); x_r += x_scale; } } void framework::core::gui::TimeLineItem::drawChildCalibration(QPainter *p, int x1, int x2) { Q_D(TimeLineItem); int cali_count; switch(d->m_uint) { case cluHour: if(d->m_scale <80) cali_count = 0; else cali_count = 6; break; case cluDay: if(d->m_scale > 60) cali_count = 24; else if( d->m_scale < 55) cali_count = 0; else cali_count = 12; break; case cluMonth: if(d->m_scale > 35) cali_count = get_time(x1).date().daysInMonth(); else if( d->m_scale < 30) cali_count = 0; else cali_count = get_time(x1).date().daysInMonth()/2; break; case cluYear: if(d->m_scale > 10) cali_count =12; else if( d->m_scale < 5) cali_count = 0; else cali_count = 6; break; } if(cali_count <= 0) return; double child_scale = double(x2 - x1) / double(cali_count); for(int i=1;i<cali_count+1;i++) { p->drawLine(x1 + child_scale*i,0, x1 + child_scale*i,6); } } void framework::core::gui::TimeLineItem::drawText(QPainter *p, int x) { Q_D(TimeLineItem); QDateTime time = get_time(x); QString text; QString text1; switch(d->m_uint) { case cluHour: { int hour = time.time().hour(); if(hour ==0) text1 = time.toString("yyyy-MM-dd"); if(d->m_scale <77) text = time.toString("hh"); else text = time.toString("hh:00"); break; } case cluDay: { int day = time.date().day(); if(day == 1) text1 = time.toString("yyyy-MM"); text = time.toString("dd"); break; } case cluMonth: { int month = time.date().month(); if(month == 1) text1 = time.toString("yyyy"); text = time.date().shortMonthName(time.date().month()); break; } case cluYear: { text = time.toString("yyyy"); break; } default: break; } QFontMetrics metric(qApp->font()); // 获取字体高度 QRect rec = metric.boundingRect( text); p->drawLine( x, 0, x , 12); p->drawText(x - rec.width()/2, 24 ,text); rec = metric.boundingRect( text1); p->drawText(x - rec.width()/2, rec.height() + 24 ,text1 ); } QDateTime framework::core::gui::TimeLineItem::get_time(int x ) { Q_D(TimeLineItem); if(x == 0) return d->m_curDate; QDateTime time; int x_scale = (d->m_scale%25 + 1) * 20; // 每个刻度之间的距离像素 double time_uint = (double)(x - d->m_left) / (double)x_scale; switch(d->m_uint) { case cluHour: { time = d->m_left_date.addSecs(60 * 60 * time_uint); break; } case cluDay: { time = d->m_left_date.addDays( (int)time_uint); time = time.addSecs( 24 * 60 * 60 * (time_uint -(int)time_uint )); break; } case cluMonth: { time = d->m_left_date.addMonths( (int)time_uint); time = time.addSecs(time.date().daysInMonth() * 24 * 60 * 60 * (time_uint -(int)time_uint )); break; } case cluYear: { time = d->m_left_date.addYears((int)time_uint); time = time.addSecs( time.date().daysInYear() * (time_uint -(int)time_uint) * 24 * 60 * 60); break; } default: break; } return time; } QDateTime framework::core::gui::TimeLineItem::get_time(int x, int scale, int left, QDateTime left_time) { Q_D(TimeLineItem); QDateTime time; int x_scale = (scale%25 +1) * 20; // 每个刻度之间的距离像素 double time_uint = (double)(x - left) / (double)x_scale; switch(d->m_uint) { case cluHour: { time = left_time.addSecs(60 * 60 * time_uint); break; } case cluDay: { time = left_time.addDays( (int)time_uint); time = time.addSecs( 24 * 60 * 60 * (time_uint -(int)time_uint )); break; } case cluMonth: { time = left_time.addMonths( (int)time_uint); time = time.addSecs(time.date().daysInMonth() * 24 * 60 * 60 * (time_uint -(int)time_uint )); break; } case cluYear: { time = left_time.addYears((int)time_uint); time = time.addSecs( time.date().daysInYear() * (time_uint -(int)time_uint) * 24 * 60 * 60); break; } default: break; } return time; } qint64 framework::core::gui::TimeLineItem::get_offset_time(int x) { Q_D(TimeLineItem); qint64 offset; QDateTime time; int x_scale = (d->m_scale%25 + 1) * 20; // 每个刻度之间的距离像素 double time_uint = (double)x / (double)x_scale; // double time_uint = (double)x / (double)x_scale; switch(d->m_uint) { case cluHour: { time = d->m_left_date.addSecs(60 * 60 * time_uint); break; } case cluDay: { time = d->m_left_date.addDays( (int)time_uint); time = time.addSecs( 24 * 60 * 60 * (time_uint -(int)time_uint ));