這個控件沒有太多的應用場景,主要就是練手,論美觀的話比不上以前發過的一個圖片時鐘控件,因此此控件也是做爲一個基礎的繪製demo出如今Qt源碼中,咱們能夠在Qt的安裝目錄下找到一個時鐘控件的繪製,甚至還有qml版本,本控件無非就是一個儀表邊框加上時鐘分鐘刻度再加上時分秒指針,打完收工,我是在此基礎上增長了能夠設置各類顏色,而後鼠標右鍵可設置四種效果 普通效果/彈簧效果/連續效果/隱藏效果,彈簧效果的意思是秒鐘走動的時候,先移動到超過指定位置,而後又從新彈回來,連續效果的意思是將步長減小,一點點的移動,將秒鐘的定時器精度調高。還有一個新增的功能是內置了設置系統時間公共槽函數,支持任意操做系統。linux
#ifndef GAUGECLOCK_H #define GAUGECLOCK_H /** * 時鐘儀表盤控件 做者:feiyangqingyun(QQ:517216493) 2016-10-23 * 1:可設置邊框顏色 * 2:可設置前景色背景色 * 3:可設置時鐘分鐘秒鐘指針顏色 * 4:可設置刷新間隔 * 5:鼠標右鍵可設置四種效果 普通效果/彈簧效果/連續效果/隱藏效果 * 6:增長設置系統時間公共槽函數,支持任意操做系統 */ #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, //彈簧效果 SecondStyle_Continue = 2, //連續效果 SecondStyle_Hide = 3 //隱藏效果 }; 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; //外邊框漸變開始顏色 QColor crownColorEnd; //外邊框漸變結束顏色 QColor foreground; //前景色 QColor background; //背景色 QColor pointerHourColor; //時鐘指針顏色 QColor pointerMinColor; //分鐘指針顏色 QColor pointerSecColor; //秒鐘指針顏色 SecondStyle secondStyle; //秒針走動樣式 QTimer *timer; //定時器繪製 int hour, min, sec, msec; //時分秒毫秒 QTimer *timerSpring; //定時器顯示彈簧效果 double angleSpring; //彈簧角度 QAction *action_secondstyle; //秒針樣式右鍵菜單 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: //設置秒針走動樣式 void setSecondStyle(const SecondStyle &secondStyle); //設置系統時間 void setSystemDateTime(const QString &year, const QString &month, const QString &day, const QString &hour, const QString &min, const QString &sec); //設置外邊框漸變顏色 void setCrownColorStart(const QColor &crownColorStart); void setCrownColorEnd(const QColor &crownColorEnd); //設置前景色 void setForeground(const QColor &foreground); //設備背景色 void setBackground(const QColor &background); //設置時鐘指針顏色 void setPointerHourColor(const QColor &pointerHourColor); //設置分鐘指針顏色 void setPointerMinColor(const QColor &pointerMinColor); //設置秒鐘指針顏色 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); //繪製準備工做,啓用反鋸齒,平移座標軸中心,等比例縮放 QPainter painter(this); painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); painter.translate(width / 2, height / 2); painter.scale(side / 200.0, side / 200.0); //繪製外邊框 drawCrown(&painter); //繪製背景 drawBg(&painter); //繪製刻度線 drawScale(&painter); //繪製刻度值 drawScaleNum(&painter); //繪製時鐘指針 drawHour(&painter); //繪製分鐘指針 drawMin(&painter); //繪製秒鐘指針 drawSec(&painter); //繪製中心蓋板 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(); //設置畫筆平滑圓角 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(); //設置畫筆平滑圓角 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(); //設置畫筆平滑圓角 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 == "彈簧效果") { action->setText("連續效果"); setSecondStyle(SecondStyle_Spring); } else if (str == "連續效果") { action->setText("隱藏效果"); setSecondStyle(SecondStyle_Continue); } else if (str == "隱藏效果") { action->setText("普通效果"); setSecondStyle(SecondStyle_Hide); } else if (str == "普通效果") { action->setText("彈簧效果"); setSecondStyle(SecondStyle_Normal); } }