c/c++语言开发共享QT自定义之滑动开关

  #ifndef sliderbutton_h  #define sliderbutton_h     #include <qwidget>  #include <qmouseevent>  #include <qpaintevent>  #include <qpainter>  #include <qpen>  #include <qpainterpath>  #include <qcolor>  #include <qtimer>  #include <qdebug>     namespace ui {  class sliderbutton;  }        class sliderbutton : public qwidget  {   q_object     public:   explicit sliderbutton(qwidget *parent = nullptr);   ~sliderbutton();      void set_button_size(const int &w, const int &h);   void set_button_color(const qcolor & , const qcolor & ,const qcolor & );      signals:   void signal_button_on();   void signal_button_off();     protected:   virtual void mousepressevent(qmouseevent *event);   virtual void paintevent(qpaintevent *event);     public slots:   void slot_update();     private:   bool m_button_status;      int m_circle_width;   int m_button_pos;   int m_move_distance;      qcolor m_backcolor_on;   qcolor m_backcolor_off;   qcolor m_circle_color;      qtimer *m_timer;  };     #endif // sliderbutton_h

  #include "sliderbutton.h"     sliderbutton::sliderbutton(qwidget *parent) :   qwidget (parent),   m_button_status(false),   m_circle_width(30),   m_button_pos(0),   m_move_distance(20),   m_backcolor_on(qt::red),   m_backcolor_off(qt::blue),   m_circle_color(qt::black)  {   setwindowflags(qt::framelesswindowhint);   setattribute(qt::wa_translucentbackground);   m_timer = new qtimer(this);   connect(m_timer, signal(timeout()), this, slot(slot_update()));  }     sliderbutton::~sliderbutton()  {  }     void sliderbutton::set_button_size(const int & width, const int &heigh)  {    m_circle_width = heigh;    m_move_distance = width;  }     void sliderbutton::set_button_color(const qcolor &on_color, const qcolor &off_color, const qcolor &button_color)  {    m_backcolor_on = on_color;    m_backcolor_off = off_color;    m_circle_color = button_color;  }     void sliderbutton::mousepressevent(qmouseevent *event)  {   q_unused(event)   if (false == m_button_status)   {    m_button_status = true;    emit signal_button_off();   }   else   {    m_button_status = false;    emit signal_button_on();   }   m_timer->start(1);  }     void sliderbutton::paintevent(qpaintevent *event)  {   q_unused(event);   qpainter painter(this);   qpainterpath path;   painter.setrenderhint(qpainter::antialiasing, true);         if (m_button_status == true)   {    painter.setbrush(m_backcolor_off);   }   else   {    painter.setbrush(m_backcolor_on);   }   qrect rect (0, 0, m_circle_width, m_circle_width);   int startx = rect.left() + rect.width() / 2;   int starty = rect.top();   path.moveto(startx,starty);   path.arcto(qrect(rect.left(), rect.top(), rect.width(), rect.height()),90,180);   path.lineto((rect.left() + m_move_distance ), rect.bottom() + 1); // the graph not connet , neet 1 pixcel   path.arcto(qrect((startx + m_move_distance),rect.top(),rect.width(),rect.height()),270,180);   path.lineto(startx,starty);   painter.drawpath(path);      // draw small circle   painter.setbrush(m_circle_color);   painter.drawellipse(m_button_pos ,0,m_circle_width,m_circle_width);  }     void sliderbutton::slot_update()  {   if (m_button_status == true)   {    m_button_pos += 1;    if (m_button_pos == m_move_distance + m_circle_width / 2)    {     m_timer->stop();    }   }   else if(m_button_status == false)   {    m_button_pos -= 1;    if (m_button_pos == 0)    {     m_timer->stop();    }   }   update();  }