《QT实用小工具·四十八》趣味开关

1、概述
源码放在文章末尾

该项目实现了各种样式的趣味开关：
1、爱心形状的switch开关，支持手势拖动、按压效果

2、线条样式的3种开关

项目demo演示如下所示：

使用方式：
1、sapid_switch文件夹加入工程，.pro文件中INCLUDEPATH+=sapid_switch
2、

LovelyHeartSwitch* swtch = new LovelyHeartSwitch(this);
swtch->setState(bool);
connect(swtch, SIGNAL(stateChanged(bool)), ...);

项目部分代码如下所示：

#ifndef SAPIDSWITCHBASE_H
#define SAPIDSWITCHBASE_H#include <QObject>
#include <QWidget>
#include <QPainter>
#include <QPainterPath>
#include <QResizeEvent>
#include <QMouseEvent>
#include <QApplication>
#include <QDebug>
#include <QPropertyAnimation>
#include <QMouseEvent>
#include "math.h"class SapidSwitchBase : public QWidget
{Q_OBJECTQ_PROPERTY(double swtch READ getSwtchProg WRITE setSwtchProg)Q_PROPERTY(double press READ getPressProg WRITE setPressProg)
public:explicit SapidSwitchBase(QWidget *parent = nullptr);bool getState() const;bool isChecked() const;virtual void setSuitableHeight(int h);signals:void stateChanged(bool state);public slots:void setState(bool state);void setStateWithoutSignal(bool state);void toggleState();void toggleStateWithoutSignal();void setForeground(QColor color);void setBackground(QColor on, QColor off);void setBorder(QColor color, int size);void setAnimationDuration(int dur);void setAnimationEasingCurve(QEasingCurve curve);protected:virtual void resizeEvent(QResizeEvent *event) override;virtual void mousePressEvent(QMouseEvent *event) override;virtual void mouseMoveEvent(QMouseEvent *event) override;virtual void mouseReleaseEvent(QMouseEvent *event) override;virtual void calculateGeometry();virtual QPainterPath getBgPath() const;virtual QColor getBgColor() const;virtual void startSwitchAnimation();virtual void startSwitchAnimation(double target, int duration);virtual void startNoSwitchAnimation();virtual void setSwtchProgManual(double p);private:double getSwtchProg();void setSwtchProg(double p);double getPressProg();void setPressProg(double p);protected:// 状态bool currentState = false; // 开关状态double aniProgess = 0;     // 当前开关动画值，趋向state，范围0~1QColor colorFg = QColor(255, 250, 250);QColor colorOn = QColor(30, 144, 255);QColor colorOff = Qt::lightGray;QColor colorBd = Qt::transparent;int borderSize = 0; // 四周的间距，算入手势拖拽的位置int switchDuration = 350;QEasingCurve curve = QEasingCurve::InOutCubic;// 几何const double sapid_PI = 3.1415926535;const double GenHao2 = sqrt(2.0);// 滑动手势QPoint pressPos;bool moved = false;bool dragging = false;bool moveTargetState = false; // 滑动的目标状态，等待松手const double stickOnProp = 0.15; // 在两侧贴靠，不收左右滑动手势影响int prevX = 0;double slideLeft, slideRight;  // 滑动左右判定边界// 按压缩放const double pressScale = 0.9; // 按压缩小动画double pressAniProg; // 按下去的动画进度double pressScaleProgress = 1; // 按压缩小进度
};#endif // SAPIDSWITCHBASE_H

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