本文实例为大家分享了Qt实现苹果状态切换按钮的具体代码，供大家参考，具体内容如下
代码如下
#include "button.h"
#include <QDebug>
Button::Button(QWidget *parent) :
QPushButton(parent)
{
status = 0;
span_length = 0;
rl_flag = false;
release_flag =true;
timeline = new QTimeLine;
connect(timeline,SIGNAL(frameChanged(int)),this,SLOT(timeOut(int)));
}
void Button::paintEvent(QPaintEvent *e)
{
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing, true);
QPen pen;
pen.setWidth(2);
pen.setColor(QColor(219,219,219));
painter.setPen(pen);
painter.setBrush(Qt::green);
painter.drawRoundedRect(1,1,this->width()-2,this->height()-2,30,30);
painter.setBrush(Qt::white);
painter.setPen(pen);
if(!rl_flag){
switch(status)
{
case 0:painter.drawEllipse(1,1,this->height()-3,this->height()-3);break;
case 1:painter.drawRoundedRect(1,1,span_length,this->height()-2,30,30);break;
case 2:painter.drawEllipse(this->width()+3-this->height(),1,this->height()-3,this->height()-3);rl_flag=true;status=0;break;
}
}else{
switch(status)
{
case 0:painter.drawEllipse(this->width()+3-this->height(),1,this->height()-3,this->height()-3);break;
case 1:painter.drawRoundedRect(this->width()-1-span_length,1,span_length,this->height()-2,30,30);break;
case 2:painter.drawEllipse(1,1,this->height()-3,this->height()-3);rl_flag=false;status=0;break;
}
}
}
void Button::drawSpan(QPainter painter,int s)
{
}
void Button::mousePressEvent(QMouseEvent *e)
{
timeline->setDuration(400);
span_length = 0;
status=1;
if(!rl_flag){
int r1 = this->height()-3;
int r2 = (this->width()/4*3)>r1?(this->width()/4*3):r1;
timeline->setFrameRange(r1,r2);
}else{
int r1 = this->height()-3;
int r2 = (this->width()/4*3)>r1?(this->width()/4*3):r1;//(this->width()/4*1)>r1?(this->width()/4*1):r1;
timeline->setFrameRange(r1,r2);
}
timeline->start();
}
void Button::mouseMoveEvent(QMouseEvent *e)
{
}
void Button::mouseReleaseEvent(QMouseEvent *e)
{
timeline->stop();
status = 2;
update();
}
void Button::timeOut(int x)
{
status = 1;
span_length = x;
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免费资源网。
