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。