Qt编写自定义控件18-魔法小鱼
作者:互联网
一、前言
上次发了个纯painter绘制的老鼠,那个就是qt目录下的demo,改的,只是比demo中的老鼠稍微胖一点,估计人到中年都发福吧。这次来一个魔法小鱼,这条鱼可以变换颜色,尾巴还会摇动,可以设定旋转的角度以及尾巴摆动的幅度等,原理是参考网上一个安卓大神写的(绘制原理 https://www.jianshu.com/p/3dd3d1524851)。
其实在Qt学习过程中,如果越到问题找不到相关文章和答案,可以试着将关键字改成安卓试试,你会发现另外一篇天地,大量的资源和文章介绍等,就比如安卓中用的java的painter,就几乎和Qt中的一样,估计填写编程语言都很类似,连方法名字几乎都是一样,设置参数,具有很多通用性,作为一名程序员,最重要的是理解思路和原理,甚至学习的方法,这些掌握了,任何语言都不是问题。
二、实现的功能
- 1:可设置鱼头+鱼身+鱼鳍+鱼尾的颜色
- 2:可设置鱼头+鱼身+鱼鳍+鱼尾的比例
- 3:可设置基准颜色,作为所有统一颜色
- 4:可设置鱼鳍是否摆动
- 5:可设置鱼的停留位置旋转角度
三、效果图
四、头文件代码
#ifndef MAGICFISH_H #define MAGICFISH_H /** * 魔幻鱼控件 作者:feiyangqingyun(QQ:517216493) 2018-7-15 * 本控件来源于网络(原作者:tyroneli(http://www.qtcn.org/bbs/read-htm-tid-65412.html)) * 绘制原理 https://www.jianshu.com/p/3dd3d1524851 * 1:可设置鱼头+鱼身+鱼鳍+鱼尾的颜色 * 2:可设置鱼头+鱼身+鱼鳍+鱼尾的比例 * 3:可设置基准颜色,作为所有统一颜色 * 4:可设置鱼鳍是否摆动 * 5:可设置鱼的停留位置旋转角度 */ #include#ifdef quc #if (QT_VERSION < QT_VERSION_CHECK(5,7,0)) #include#else #include#endif class QDESIGNER_WIDGET_EXPORT MagicFish : public QWidget #else class MagicFish : public QWidget #endif { Q_OBJECT Q_PROPERTY(QColor headColor READ getHeadColor WRITE setHeadColor) Q_PROPERTY(QColor bodyColor READ getBodyColor WRITE setBodyColor) Q_PROPERTY(QColor finColor READ getFinColor WRITE setFinColor) Q_PROPERTY(QColor tailColor READ getTailColor WRITE setTailColor) Q_PROPERTY(QColor baseColor READ getBaseColor WRITE setBaseColor) Q_PROPERTY(bool finMove READ getFinMove WRITE setFinMove) Q_PROPERTY(int speed READ getSpeed WRITE setSpeed) Q_PROPERTY(double wave READ getWave WRITE setWave) Q_PROPERTY(double currentAngle READ getCurrentAngle WRITE setCurrentAngle) public: explicit MagicFish(QWidget *parent = 0); ~MagicFish(); protected: void resizeEvent(QResizeEvent *); void paintEvent(QPaintEvent *); void drawHead(QPainter *painter); void drawBody(QPainter *painter, const QPointF &pos, double angle); void drawFin(QPainter *painter, const QPointF &pos, bool left, double angle); void drawTail(QPainter *painter, const QPointF &pos, double angle); void drawTail1(QPainter *painter, const QPointF &pos, double angle); void drawTail2(QPainter *painter, const QPointF &pos, double angle); private: //计算坐标点 QPointF calcPoint(const QPointF &pos, double len, double angle); double qDegreesToRadians(double degrees); double qRadiansToDegrees(double radians); private: QColor headColor; //鱼头颜色 QColor bodyColor; //鱼身颜色 QColor finColor; //鱼鳍颜色 QColor tailColor; //鱼尾颜色 QColor baseColor; //基准颜色 bool finMove; //鱼鳍是否摆动 int speed; //游动的速度即尾巴摆动的频率 double wave; //晃动的幅度 double currentAngle; //旋转的角度 int currentValue; //游动的位置 double headLen; //鱼头尺寸 double bodyLen; //鱼身尺寸 double finLen; //鱼鳍尺寸 double tailLen; //鱼尾尺寸 QPointF headPos; //鱼头坐标 QTimer *timer; //定时器处理游动 public: QColor getHeadColor() const; QColor getBodyColor() const; QColor getFinColor() const; QColor getTailColor() const; QColor getBaseColor() const; bool getFinMove() const; int getSpeed() const; double getWave() const; double getCurrentAngle() const; double getHeadLen() const; QPointF getHeadPos() const; QSize sizeHint() const; QSize minimumSizeHint() const; private slots: void updateValue(); public slots: //设置鱼头颜色 void setHeadColor(const QColor &headColor); //设置鱼身颜色 void setBodyColor(const QColor &bodyColor); //设置鱼鳍颜色 void setFinColor(const QColor &finColor); //设置鱼尾颜色 void setTailColor(const QColor &tailColor); //设置基准颜色 void setBaseColor(const QColor &baseColor); //设置鱼鳍是否摆动 void setFinMove(bool finMove); //设置游动的速度 void setSpeed(int speed); //设置滑动的幅度 void setWave(double wave); //设置当前旋转的角度 void setCurrentAngle(double currentAngle); void setCurrentAngle(int currentAngle); //设置头部的长度 void setHeadLen(int headLen); }; #endif // MAGICFISH_H
四、完整代码
#pragma execution_character_set("utf-8") #include "magicfish.h" #include "qpainter.h" #include "qmath.h" #include "qtimer.h" #include "qdebug.h" MagicFish::MagicFish(QWidget *parent) : QWidget(parent) { headColor = QColor(244, 92, 71, 200); bodyColor = QColor(244, 92, 71, 220); finColor = QColor(244, 92, 71, 150); tailColor = QColor(244, 92, 71, 180); baseColor = QColor(244, 92, 71); finMove = false; speed = 30; wave = 1.0; currentAngle = 0.0; currentValue = 0; headLen = 10; finLen = headLen * 1.8; bodyLen = headLen * 5.2; tailLen = headLen * 0.8; timer = new QTimer(this); connect(timer, SIGNAL(timeout()), this, SLOT(updateValue())); timer->start(100); } MagicFish::~MagicFish() { if (timer->isActive()) { timer->stop(); } } void MagicFish::resizeEvent(QResizeEvent *) { headLen = qMin(width(), height()) / 10.0; bodyLen = headLen * 5.2; finLen = headLen * 1.8; tailLen = headLen * 0.8; } void MagicFish::paintEvent(QPaintEvent *) { //绘制准备工作,启用反锯齿 QPainter painter(this); painter.setRenderHint(QPainter::Antialiasing); QPointF middlePos = QPointF(width() / 2, height() / 2); headPos = calcPoint(middlePos, bodyLen / 1.5, currentAngle); double angle = currentAngle + qSin(qDegreesToRadians(currentValue * 1.2 * wave)) * 2; QPointF pos = calcPoint(headPos, bodyLen, angle - 180); //绘制头部 drawHead(&painter); //绘制鱼身 drawBody(&painter, pos, angle); //绘制左侧鱼鳍 QPointF leftPos = calcPoint(headPos, headLen * 0.9, angle + 110); drawFin(&painter, leftPos, true, angle); //绘制右侧鱼鳍 QPointF rightPos = calcPoint(headPos, headLen * 0.9, angle - 110); drawFin(&painter, rightPos, false, angle); //绘制鱼尾 drawTail(&painter, pos, angle); } void MagicFish::drawHead(QPainter *painter) { painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(headColor); //鱼头关节圆 painter->drawEllipse(headPos, headLen, headLen); painter->restore(); } void MagicFish::drawBody(QPainter *painter, const QPointF &pos, double angle) { //计算身体部分四个点 QPointF pos1 = calcPoint(headPos, headLen, angle - 80); QPointF pos2 = calcPoint(pos, headLen * 0.8, angle - 90); QPointF pos3 = calcPoint(pos, headLen * 0.8, angle + 90); QPointF pos4 = calcPoint(headPos, headLen, angle + 80); QPointF leftPos = calcPoint(headPos, bodyLen * 0.56, angle - 130); QPointF rightPos = calcPoint(headPos, bodyLen * 0.56, angle + 130); //计算绘制路径 QPainterPath path; path.moveTo(pos1); path.quadTo(leftPos, pos2); path.lineTo(pos3); path.quadTo(rightPos, pos4); path.lineTo(pos1); painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(bodyColor); painter->drawPath(path); painter->restore(); } void MagicFish::drawFin(QPainter *painter, const QPointF &pos, bool left, double angle) { double controlAngle = 115; double finAngle = finMove ? qSin(qDegreesToRadians(currentValue * 16.1 * wave)) * 12.0 : 2; QPointF endPos = calcPoint(pos, finLen, left ? angle + finAngle + 180 : angle - finAngle - 180); QPointF controlPos = calcPoint(pos, finLen * 1.8, left ? angle + controlAngle + finAngle : angle - controlAngle - finAngle); //计算鱼鳍的路径 QPainterPath path; path.moveTo(pos); path.quadTo(controlPos, endPos); path.lineTo(pos); painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(finColor); painter->drawPath(path); painter->restore(); } void MagicFish::drawTail(QPainter *painter, const QPointF &pos, double angle) { double flag = 0.6; double length = tailLen * (flag + 1); double tailAngle = angle + qCos(qDegreesToRadians(currentValue * 1.5 * wave)) * 15; QPointF endPos = calcPoint(pos, length, tailAngle - 180); QPointF pos1 = calcPoint(pos, tailLen, tailAngle - 90); QPointF pos2 = calcPoint(endPos, tailLen * flag, tailAngle - 90); QPointF pos3 = calcPoint(endPos, tailLen * flag, tailAngle + 90); QPointF pos4 = calcPoint(pos, tailLen, tailAngle + 90); QPainterPath path; path.moveTo(pos1); path.lineTo(pos2); path.lineTo(pos3); path.lineTo(pos4); painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(tailColor); //鱼尾关节大圆 painter->drawEllipse(pos, tailLen, tailLen); //鱼尾关节小圆 painter->drawEllipse(endPos, tailLen * flag, tailLen * flag); //鱼尾肉部分路径 painter->drawPath(path); painter->restore(); //绘制鱼尾关节 drawTail1(painter, endPos, tailAngle); } void MagicFish::drawTail1(QPainter *painter, const QPointF &pos, double angle) { double len = tailLen * 0.6; double flag = 0.4; double length = len * (flag + 2.7); double tailAngle = angle + qSin(qDegreesToRadians(currentValue * 1.7 * wave)) * 35; QPointF endPos = calcPoint(pos, length, tailAngle - 180); QPointF pos1 = calcPoint(pos, len, tailAngle - 90); QPointF pos2 = calcPoint(endPos, len * flag, tailAngle - 90); QPointF pos3 = calcPoint(endPos, len * flag, tailAngle + 90); QPointF pos4 = calcPoint(pos, len, tailAngle + 90); QPainterPath path; path.moveTo(pos1); path.lineTo(pos2); path.lineTo(pos3); path.lineTo(pos4); painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(tailColor); painter->drawPath(path); painter->restore(); //绘制鱼尾鱼鳍 drawTail2(painter, pos, tailAngle); } void MagicFish::drawTail2(QPainter *painter, const QPointF &pos, double angle) { double len = tailLen * 0.6; double flag = 0.4; double length = len * (flag + 2.7); double tailWidth = qAbs(qSin(qDegreesToRadians(currentValue * 1.9 * wave)) * len + headLen / 5.0 * 3.0); QPointF endPos1 = calcPoint(pos, length, angle - 180); QPointF endPos2 = calcPoint(pos, length - 10, angle - 180); QPointF pos1 = calcPoint(endPos1, tailWidth, angle - 90); QPointF pos2 = calcPoint(endPos1, tailWidth, angle + 90); QPointF pos3 = calcPoint(endPos2, tailWidth - headLen / 1.5, angle - 90); QPointF pos4 = calcPoint(endPos2, tailWidth - headLen / 1.5, angle + 90); QPainterPath path1; path1.moveTo(pos); path1.lineTo(pos3); path1.lineTo(pos4); path1.lineTo(pos); QPainterPath path2; path2.moveTo(pos); path2.lineTo(pos1); path2.lineTo(pos2); path2.lineTo(pos); painter->save(); painter->setPen(Qt::NoPen); painter->setBrush(tailColor); painter->drawPath(path1); painter->drawPath(path2); painter->restore(); } QPointF MagicFish::calcPoint(const QPointF &pos, double len, double angle) { double x = qCos(qDegreesToRadians(angle)) * len; double y = qSin(qDegreesToRadians(angle - 180)) * len; return QPointF(pos + QPointF(x, y)); } double MagicFish::qDegreesToRadians(double degrees) { return degrees * double(M_PI / 180); } double MagicFish::qRadiansToDegrees(double radians) { return radians * double(180 / M_PI); } void MagicFish::updateValue() { //值会一直递增,需要判断是否越界 if (currentValue >= (INT_MAX - speed)) { currentValue = 0; } currentValue = (currentValue + speed) % 54000; update(); } QColor MagicFish::getHeadColor() const { return this->headColor; } QColor MagicFish::getBodyColor() const { return this->bodyColor; } QColor MagicFish::getFinColor() const { return this->finColor; } QColor MagicFish::getTailColor() const { return this->tailColor; } QColor MagicFish::getBaseColor() const { return this->baseColor; } bool MagicFish::getFinMove() const { return this->finMove; } int MagicFish::getSpeed() const { return this->speed; } double MagicFish::getWave() const { return this->wave; } double MagicFish::getCurrentAngle() const { return this->currentAngle; } double MagicFish::getHeadLen() const { return this->headLen; } QPointF MagicFish::getHeadPos() const { return this->headPos; } QSize MagicFish::sizeHint() const { return QSize(200, 200); } QSize MagicFish::minimumSizeHint() const { return QSize(20, 20); } void MagicFish::setHeadColor(const QColor &headColor) { if (this->headColor != headColor) { this->headColor = headColor; update(); } } void MagicFish::setBodyColor(const QColor &bodyColor) { if (this->bodyColor != bodyColor) { this->bodyColor = bodyColor; update(); } } void MagicFish::setFinColor(const QColor &finColor) { if (this->finColor != finColor) { this->finColor = finColor; update(); } } void MagicFish::setTailColor(const QColor &tailColor) { if (this->tailColor != tailColor) { this->tailColor = tailColor; update(); } } void MagicFish::setBaseColor(const QColor &baseColor) { if (this->baseColor != baseColor) { this->baseColor = baseColor; //根据基准颜色设置其他颜色 this->baseColor.setAlpha(200); headColor = this->baseColor; this->baseColor.setAlpha(220); bodyColor = this->baseColor; this->baseColor.setAlpha(150); finColor = this->baseColor; this->baseColor.setAlpha(180); tailColor = this->baseColor; update(); } } void MagicFish::setFinMove(bool finMove) { if (this->finMove != finMove) { this->finMove = finMove; update(); } } void MagicFish::setSpeed(int speed) { if (this->speed != speed) { this->speed = speed; update(); } } void MagicFish::setWave(double wave) { if (this->wave != wave) { this->wave = wave; update(); } } void MagicFish::setCurrentAngle(double currentAngle) { if (this->currentAngle != currentAngle) { this->currentAngle = currentAngle; update(); } } void MagicFish::setCurrentAngle(int currentAngle) { setCurrentAngle((double)currentAngle); } void MagicFish::setHeadLen(int headLen) { if (this->headLen != headLen) { this->headLen = headLen; this->finLen = headLen * 1.8; this->bodyLen = headLen * 5.2; this->tailLen = headLen * 0.8; update(); } }
六、控件介绍
- 超过150个精美控件,涵盖了各种仪表盘、进度条、进度球、指南针、曲线图、标尺、温度计、导航条、导航栏,flatui、高亮按钮、滑动选择器、农历等。远超qwt集成的控件数量。
- 每个类都可以独立成一个单独的控件,零耦合,每个控件一个头文件和一个实现文件,不依赖其他文件,方便单个控件以源码形式集成到项目中,较少代码量。qwt的控件类环环相扣,高度耦合,想要使用其中一个控件,必须包含所有的代码。
- 全部纯Qt编写,QWidget+QPainter绘制,支持Qt4.6到Qt5.12的任何Qt版本,支持mingw、msvc、gcc等编译器,支持任意操作系统比如windows+linux+mac+嵌入式linux等,不乱码,可直接集成到Qt Creator中,和自带的控件一样使用,大部分效果只要设置几个属性即可,极为方便。
- 每个控件都有一个对应的单独的包含该控件源码的DEMO,方便参考使用。同时还提供一个所有控件使用的集成的DEMO。
- 每个控件的源代码都有详细中文注释,都按照统一设计规范编写,方便学习自定义控件的编写。
- 每个控件默认配色和demo对应的配色都非常精美。
- 超过130个可见控件,6个不可见控件。
- 部分控件提供多种样式风格选择,多种指示器样式选择。
- 所有控件自适应窗体拉伸变化。
- 集成自定义控件属性设计器,支持拖曳设计,所见即所得,支持导入导出xml格式。
- 自带activex控件demo,所有控件可以直接运行在ie浏览器中。
- 集成fontawesome图形字体+阿里巴巴iconfont收藏的几百个图形字体,享受图形字体带来的乐趣。
- 所有控件最后生成一个dll动态库文件,可以直接集成到qtcreator中拖曳设计使用。
- 目前已经有qml版本,后期会考虑出pyqt版本,如果用户需求量很大的话。
七、SDK下载
- SDK下载链接:https://pan.baidu.com/s/1A5Gd77kExm8Co5ckT51vvQ 提取码:877p
- 下载链接中包含了各个版本的动态库文件,所有控件的头文件,使用demo,自定义控件+属性设计器。
- 自定义控件插件开放动态库dll使用(永久免费),无任何后门和限制,请放心使用。
- 目前已提供26个版本的dll,其中包括了qt5.12.3 msvc2017 32+64 mingw 32+64 的。
- 不定期增加控件和完善控件,不定期更新SDK,欢迎各位提出建议,谢谢!
- widget版本(QQ:517216493)qml版本(QQ:373955953)三峰驼(QQ:278969898)。
- 涛哥的知乎专栏 Qt进阶之路 https://zhuanlan.zhihu.com/TaoQt
- 欢迎关注微信公众号【高效程序员】,C++/Python、学习方法、写作技巧、热门技术、职场发展等内容,干货多多,福利多多!
标签:控件,MagicFish,angle,Qt,自定义,double,QPointF,painter 来源: https://blog.51cto.com/u_15246509/2844805