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Qt编写自定义控件54-时钟仪表盘
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一、前言
这个控件没有太多的应用场景，主要就是练手，论美观的话比不上之前发过的一个图片时钟控件，所以此控件也是作为一个基础的绘制demo出现在Qt源码中，我们可以在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，我是在此基础上增加了可以设置各种颜色，然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，然后又重新弹回来，连续效果的意思是将步长减少，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,支持任意操作系统。
二、实现的功能- 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:增加设置系统时间公共槽函数,支持任意操作系统
三、效果图
四、头文件代码
#ifndef GAUGECLOCK_H
#define GAUGECLOCK_H/**
* 时钟仪表盘控件 作者: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:增加设置系统时间公共槽函数,支持任意操作系统
*/#include <QWidget>#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endifclass 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
五、核心代码
void GaugeClock::paintEvent(QPaintEvent *)
{
int width = this->width();
int height = this->height();
int side = qMin(width, height); //绘制准备工作,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);
}
}
