QT自定义UI组件_腾讯视屏Ipad的控件

效果图如下:

实现思想:

　　上半部分: 中间显示声音图片, 然后围着声音图片画一圈线条

　　下半部分: 修改QProcessBar的样式

代码如下:

#include <QWidget>
#include <QLabel>
#include <QVBoxLayout>
#include <QSlider>
#include <QProgressBar>
class SoundModule : public QWidget
{
    Q_OBJECT
public:
    explicit SoundModule(QWidget *parent = nullptr);
    void paintEvent(QPaintEvent *event);
    void initWidget();

private:
    QLabel* m_SoundLab;
    QProgressBar* m_ProBar;
    QSlider* m_SoundSlider;
    QVBoxLayout* m_MainLayout;
    int m_MaxValue;
    int m_Value;
signals:

public slots:
    void onValueChanged(int);
};

　　cpp文件

#include "soundmodule.h"
#include <QTextCodec>
#include <QPainter>
#include <QPixmap>
#include <QPalette>
#include <QDebug>
#include <QFont>
#include <QMouseEvent>

SoundModule::SoundModule(QWidget *parent) : QWidget(parent), m_MaxValue(32), m_Value(0)
{
    this->setFixedSize(QSize(600, 360));
    initWidget();
    connect(m_SoundSlider, &QSlider::valueChanged, this, &SoundModule::onValueChanged);
}

void SoundModule::initWidget()
{
    QPalette pal = this->palette();
    pal.setColor(QPalette::Background, Qt::transparent);
    this->setPalette(pal);

    m_MainLayout = new QVBoxLayout;
    m_SoundLab = new QLabel;
    m_SoundSlider = new QSlider;

    m_SoundSlider->setOrientation(Qt::Horizontal);
    m_SoundSlider->setMinimum(0);
    m_SoundSlider->setMaximum(m_MaxValue);
    m_SoundSlider->setFixedSize(300, 20);

    m_SoundLab->setFixedSize(50,50);
    QPixmap soundPix = QPixmap(":/png/soundCls.png");
    soundPix=soundPix.scaled(m_SoundLab->width(), m_SoundLab->height());
    m_SoundLab->setPixmap(soundPix);

    m_ProBar = new QProgressBar;
    m_ProBar->setObjectName("voicebar");
    m_ProBar->setFixedWidth(300);
    m_ProBar->setRange(0, m_MaxValue);

    m_ProBar->setTextVisible(false);

    m_MainLayout->addStretch(1);
    m_MainLayout->addSpacing(5);
    m_MainLayout->addWidget(m_SoundLab, 0, Qt::AlignCenter);
    m_MainLayout->addSpacing(40);
    m_MainLayout->addWidget(m_ProBar, 0, Qt::AlignCenter);
    m_MainLayout->addSpacing(25);
    m_MainLayout->addWidget(m_SoundSlider, 0, Qt::AlignCenter);
    m_MainLayout->addSpacing(5);
    m_MainLayout->addStretch(1);
    this->setLayout(m_MainLayout);
}

void SoundModule::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event)

    QPainter paint(this);
    paint.setRenderHint(QPainter::Antialiasing);
    QPen penSytle;
    penSytle.setColor(Qt::white);
    penSytle.setWidthF(5);
    penSytle.setCapStyle(Qt::MPenCapStyle);
    paint.setPen(penSytle);
    //获取声音图片在窗口的位置
    QPoint soudLab = m_SoundLab->mapToParent(m_SoundLab->pos());
    //计算声音图片中心位置
    QPoint center((soudLab.x() + m_SoundLab->width()) / 2, (m_SoundLab->height() + soudLab.y()) / 2);
    //将坐标原点平移到声音图片的中心
    paint.translate(center);
    int radius = -40; // 正数: 正下方, 负数: 正上方
    double rotate = 360.0 / m_MaxValue;
    //绘制图片
    for(int i = 0; i < m_Value; i++)
    {
        paint.drawLine( 0 , radius, 0, radius * 1.4);
        if((i % 2 == 1))
        {
            paint.setOpacity(0.5);
            paint.rotate(rotate * 2);
        }
        else
        {
            paint.setOpacity(1.0);
        }
    }
}

void SoundModule::onValueChanged(int value)
{
    m_Value = value;
    m_ProBar->setValue(m_Value);
    QString pngPath = m_Value == 0 ? QString(":/png/soundCls.png") : QString(":/png/sound.png");
    QPixmap soundPix = QPixmap(pngPath);
    soundPix=soundPix.scaled(m_SoundLab->width(), m_SoundLab->height());
    m_SoundLab->setPixmap(soundPix);
    update();
}

　　

translate函数: 坐标原点平移

rotate函数: 沿着原点坐标旋转的角度, radius = 360 / 16 , 360: 一圈的弧度, 16: 一圈总共显示16条线

QProcessBar在qss文件显示

QProgressBar#voicebar

{

    border: 0px solid grey;　　//线条显示以宽度设置

    border-radius: 5px;　　　　//弧度

    background-color: #FFFFFF;　　//背景颜色

    text-align: center;　　//显示进度条值的text位置, left center rigth

    color: #8B0000;　　//进度条值的颜色

}

QProgressBar#voicebar:chunk　//进度条值的颜色, 以弧度设置

{

    background-color: qlineargradient(spread:repeat,x1:0,y1:0,x2:1,y2:0,stop:0 #00CED1, stop:0.5 #FFF990 ,stop:1 #FF5E79);

   border-radius: 5px;

}

标签：Ipad,控件,自定义,MainLayout,ProBar,soundPix,SoundModule,SoundLab,include
来源： https://www.cnblogs.com/hul201610101100/p/13475023.html