上一篇文章中描述了按钮的纯色，本文描述标签的渐变色美化。
1.头文件
#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
//#include "CustomButton.h"
#include <QVBoxLayout>
#include <QLinearGradient>
#include <QLabel>
#include <QTimer>
QT_BEGIN_NAMESPACE
namespace Ui {
class Widget;
}
QT_END_NAMESPACE
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = nullptr);
~Widget();
void initUI();
private:
Ui::Widget *ui;
// CustomButton *button;
// QPushButton *button2;
QLabel *label;
QTimer *timer;
int counter=0;//计时器
};
2.cpp文件
#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
initUI();
}
Widget::~Widget()
{
delete ui;
}
void Widget::initUI()
{
QVBoxLayout * mainlayout = new QVBoxLayout(this);//指定布局属于啥组件
QLabel *label=new QLabel(this);
timer=new QTimer(this);
timer->start(1000);//定时1秒
QObject::connect(timer, &QTimer::timeout,
[label,this]()//lambda函数
{ counter++;
if(1==counter%2)
//qDebug("pressed!");
{
label->setStyleSheet(" border-radius: 15px;"
"border: 2px solid rgb(100, 120, 100); "
"background-color: qlineargradient(x1: 0, y1: 0,"
" x2: 1, y2: 1, "
"stop: 0 #ffffff,"
"stop: 0.3 #bbeebb,"
"stop: 1 #4f4f4f);"
);//暗
}
else
{
label->setStyleSheet(" border-radius: 15px;"
"border: 2px solid rgb(100, 120, 100); "
"background-color: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 1, "
"stop: 0 #ffffff,"
"stop: 0.3 #43ff43,"
"stop: 1 #669066);"
);//亮绿色
}
});
label->setFixedWidth(30);
label->setFixedHeight(30);
mainlayout->addWidget(label);//指定布局包含啥组件
this->setLayout(mainlayout);
}
//效果：
