关于qt实现指示灯图片闪烁问题（换了一种方法已经解决）
#include ""
#include "ui_widget.h"
#include <QPalette>
#include <QPainter>
#include <QDebug>
#include <QString>
#include <QKeyEvent>
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
QPalette pal;
pal.setBrush(QPalette::Window,Qt::black);
setPalette(pal);
timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(setTimer()));
connect(ui->startButton,SIGNAL(clicked(bool)),this,SLOT(onStartButtonclicked()));
connect(ui->stopButton,SIGNAL(clicked(bool)),this,SLOT(onStopButtonclicked()));
label = new QLabel(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
painter.drawPixmap(0,0,82,86,QPixmap("C:\\Qt\\text\\text8\\image\\icon_02.png"));
qDebug() << "i:12121212:" ;
}
void Widget::keyPressEvent(QKeyEvent *event) //键盘事件
{
QString str = QString("C:\\Qt\\text\\text8\\image\\icon_color_0%").arg( 2 );
label->setPixmap(str);
label->setScaledContents(true);
switch ( event->key() )
{
case Qt::Key_Left : timer->start(500); break;
case Qt::Key_2 : label->setGeometry(0,0,82,86); break;
}
}
void Widget::onStopButtonclicked()
{
timer->stop();
label->clear();
delete label;
return;
// QPainter painter;
// (0,0,82,86,QPixmap("C:\\Qt\\text\\text8\\image\\icon_color_02.png"));
}
void Widget::onStartButtonclicked()
{
//timer->start(500);
static int flag = 1; //设置标志位，flag为1时按钮显示"开始",为0时显示"暂停"
if( flag == 1 ){
ui->startButton->setText(tr("暂停"));
timer->start(300);//启动计时器
flag = 0;
}
else{
ui->startButton->setText(tr("开始"));
timer->stop();
flag = 1;
label->clear();
}
}
void Widget::setTimer()
{
timer->start(1000);
static int i = 1;
qDebug() << "i::" << i++;
if( i == 3 ){
i = 1;
}
QString str = QString("C:\\Qt\\text\\text8\\image\\icon_color_0%").arg( i );
label->setPixmap(str);
label->setScaledContents(true);
label->setGeometry(0,0,82,86);
}