QT自定义之滑动开关

本文实例为大家分享了qt自定义之滑动开关的具体代码，供大家参考，具体内容如下

写了一个简单的滑动开关， 不多说，上图：

代码如下：

#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

set_button_size可设置button大小。

set_button_color可设置button颜色

#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();
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。