我要评论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移动技术网。
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