这个控件没有太多的应用场景,主要就是练手,论美观的话比不上以前发过的一个图片时钟控件,因此此控件也是做为一个基础的绘制demo出如今Qt源码中,咱们能够在Qt的安装目录下找到一个时钟控件的绘制,甚至还有qml版本,本控件无非就是一个仪表边框加上时钟分钟刻度再加上时分秒指针,打完收工,我是在此基础上增长了能够设置各类颜色,而后鼠标右键可设置四种效果 普通效果/弹簧效果/连续效果/隐藏效果,弹簧效果的意思是秒钟走动的时候,先移动到超过指定位置,而后又从新弹回来,连续效果的意思是将步长减小,一点点的移动,将秒钟的定时器精度调高。还有一个新增的功能是内置了设置系统时间公共槽函数,支持任意操做系统。linux
#ifndef GAUGECLOCK_H #define GAUGECLOCK_H /** * 时钟仪表盘控件 做者:feiyangqingyun(QQ:517216493) 2016-10-23 * 1:可设置边框颜色 * 2:可设置前景色背景色 * 3:可设置时钟分钟秒钟指针颜色 * 4:可设置刷新间隔 * 5:鼠标右键可设置四种效果 普通效果/弹簧效果/连续效果/隐藏效果 * 6:增长设置系统时间公共槽函数,支持任意操做系统 */ #include <QWidget> #ifdef quc #if (QT_VERSION < QT_VERSION_CHECK(5,7,0)) #include <QtDesigner/QDesignerExportWidget> #else #include <QtUiPlugin/QDesignerExportWidget> #endif class QDESIGNER_WIDGET_EXPORT GaugeClock : public QWidget #else class GaugeClock : public QWidget #endif { Q_OBJECT Q_ENUMS(SecondStyle) Q_PROPERTY(QColor crownColorStart READ getCrownColorStart WRITE setCrownColorStart) Q_PROPERTY(QColor crownColorEnd READ getCrownColorEnd WRITE setCrownColorEnd) Q_PROPERTY(QColor foreground READ getForeground WRITE setForeground) Q_PROPERTY(QColor background READ getBackground WRITE setBackground) Q_PROPERTY(QColor pointerHourColor READ getPointerHourColor WRITE setPointerHourColor) Q_PROPERTY(QColor pointerMinColor READ getPointerMinColor WRITE setPointerMinColor) Q_PROPERTY(QColor pointerSecColor READ getPointerSecColor WRITE setPointerSecColor) Q_PROPERTY(SecondStyle secondStyle READ getSecondStyle WRITE setSecondStyle) public: enum SecondStyle { SecondStyle_Normal = 0, //普通效果 SecondStyle_Spring = 1, //弹簧效果 SecondStyle_Continue = 2, //连续效果 SecondStyle_Hide = 3 //隐藏效果 }; explicit GaugeClock(QWidget *parent = 0); ~GaugeClock(); protected: void paintEvent(QPaintEvent *); void drawCrown(QPainter *painter); void drawBg(QPainter *painter); void drawScale(QPainter *painter); void drawScaleNum(QPainter *painter); void drawHour(QPainter *painter); void drawMin(QPainter *painter); void drawSec(QPainter *painter); void drawDot(QPainter *painter); private: QColor crownColorStart; //外边框渐变开始颜色 QColor crownColorEnd; //外边框渐变结束颜色 QColor foreground; //前景色 QColor background; //背景色 QColor pointerHourColor; //时钟指针颜色 QColor pointerMinColor; //分钟指针颜色 QColor pointerSecColor; //秒钟指针颜色 SecondStyle secondStyle; //秒针走动样式 QTimer *timer; //定时器绘制 int hour, min, sec, msec; //时分秒毫秒 QTimer *timerSpring; //定时器显示弹簧效果 double angleSpring; //弹簧角度 QAction *action_secondstyle; //秒针样式右键菜单 private slots: void doAction(); void updateTime(); void updateSpring(); public: SecondStyle getSecondStyle() const; QColor getCrownColorStart() const; QColor getCrownColorEnd() const; QColor getForeground() const; QColor getBackground() const; QColor getPointerHourColor() const; QColor getPointerMinColor() const; QColor getPointerSecColor() const; QSize sizeHint() const; QSize minimumSizeHint() const; public Q_SLOTS: //设置秒针走动样式 void setSecondStyle(const SecondStyle &secondStyle); //设置系统时间 void setSystemDateTime(const QString &year, const QString &month, const QString &day, const QString &hour, const QString &min, const QString &sec); //设置外边框渐变颜色 void setCrownColorStart(const QColor &crownColorStart); void setCrownColorEnd(const QColor &crownColorEnd); //设置前景色 void setForeground(const QColor &foreground); //设备背景色 void setBackground(const QColor &background); //设置时钟指针颜色 void setPointerHourColor(const QColor &pointerHourColor); //设置分钟指针颜色 void setPointerMinColor(const QColor &pointerMinColor); //设置秒钟指针颜色 void setPointerSecColor(const QColor &pointerSecColor); }; #endif // GAUGECLOCK_H
void GaugeClock::paintEvent(QPaintEvent *) { int width = this->width(); int height = this->height(); int side = qMin(width, height); //绘制准备工做,启用反锯齿,平移坐标轴中心,等比例缩放 QPainter painter(this); painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); painter.translate(width / 2, height / 2); painter.scale(side / 200.0, side / 200.0); //绘制外边框 drawCrown(&painter); //绘制背景 drawBg(&painter); //绘制刻度线 drawScale(&painter); //绘制刻度值 drawScaleNum(&painter); //绘制时钟指针 drawHour(&painter); //绘制分钟指针 drawMin(&painter); //绘制秒钟指针 drawSec(&painter); //绘制中心盖板 drawDot(&painter); } void GaugeClock::drawCrown(QPainter *painter) { int radius = 99; painter->save(); painter->setPen(Qt::NoPen); QLinearGradient crownGradient(0, -radius, 0, radius); crownGradient.setColorAt(0, crownColorStart); crownGradient.setColorAt(1, crownColorEnd); painter->setBrush(crownGradient); painter->drawEllipse(-radius, -radius, radius * 2, radius * 2); painter->restore(); } void GaugeClock::drawBg(QPainter *painter) { int radius = 92; painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(background); painter->drawEllipse(-radius, -radius, radius * 2, radius * 2); painter->restore(); } void GaugeClock::drawScale(QPainter *painter) { int radius = 90; painter->save(); QPen pen; pen.setColor(foreground); pen.setCapStyle(Qt::RoundCap); for (int i = 0; i <= 60; i++) { if (i % 5 == 0) { pen.setWidthF(1.5); painter->setPen(pen); painter->drawLine(0, radius - 10, 0, radius); } else { pen.setWidthF(0.5); painter->setPen(pen); painter->drawLine(0, radius - 5, 0, radius); } painter->rotate(6); } painter->restore(); } void GaugeClock::drawScaleNum(QPainter *painter) { int radius = 70; painter->save(); painter->setPen(foreground); double startRad = 60 * (M_PI / 180); double deltaRad = 30 * (M_PI / 180); for (int i = 0; i < 12; i++) { double sina = qSin(startRad - i * deltaRad); double cosa = qCos(startRad - i * deltaRad); QString strValue = QString("%1").arg(i + 1); double textWidth = fontMetrics().width(strValue); double textHeight = fontMetrics().height(); int x = radius * cosa - textWidth / 2; int y = -radius * sina + textHeight / 4; painter->drawText(x, y, strValue); } painter->restore(); } void GaugeClock::drawHour(QPainter *painter) { painter->save(); //设置画笔平滑圆角 QPen pen; pen.setCapStyle(Qt::RoundCap); painter->setPen(pointerHourColor); painter->setBrush(pointerHourColor); QPolygon pts; pts.setPoints(4, -3, 8, 3, 8, 2, -40, -2, -40); painter->rotate(30.0 * ((hour + min / 60.0))); painter->drawConvexPolygon(pts); painter->restore(); } void GaugeClock::drawMin(QPainter *painter) { painter->save(); //设置画笔平滑圆角 QPen pen; pen.setCapStyle(Qt::RoundCap); painter->setPen(pointerMinColor); painter->setBrush(pointerMinColor); QPolygon pts; pts.setPoints(4, -2, 8, 2, 8, 1, -60, -1, -60); painter->rotate(6.0 * (min + sec / 60.0)); painter->drawConvexPolygon(pts); painter->restore(); } void GaugeClock::drawSec(QPainter *painter) { if (secondStyle == SecondStyle_Hide) { return; } painter->save(); //设置画笔平滑圆角 QPen pen; pen.setCapStyle(Qt::RoundCap); painter->setPen(pointerSecColor); painter->setBrush(pointerSecColor); QPolygon pts; pts.setPoints(3, -1, 10, 1, 10, 0, -70); painter->rotate(angleSpring); painter->drawConvexPolygon(pts); painter->restore(); } void GaugeClock::drawDot(QPainter *painter) { painter->save(); QConicalGradient coneGradient(0, 0, -90.0); coneGradient.setColorAt(0.0, background); coneGradient.setColorAt(0.5, foreground); coneGradient.setColorAt(1.0, background); painter->setOpacity(0.9); painter->setPen(Qt::NoPen); painter->setBrush(coneGradient); painter->drawEllipse(-5, -5, 10, 10); painter->restore(); } void GaugeClock::doAction() { QAction *action = (QAction *)sender(); QString str = action->text(); if (str == "弹簧效果") { action->setText("连续效果"); setSecondStyle(SecondStyle_Spring); } else if (str == "连续效果") { action->setText("隐藏效果"); setSecondStyle(SecondStyle_Continue); } else if (str == "隐藏效果") { action->setText("普通效果"); setSecondStyle(SecondStyle_Hide); } else if (str == "普通效果") { action->setText("弹簧效果"); setSecondStyle(SecondStyle_Normal); } }