Qt自绘系列

一、自定义状态笑脸

 其中笑脸是png图片，通过drawPixmap，右边字体通过drawText

ZStateText.h

#ifndef ZSTATETEXT_H
#define ZSTATETEXT_H

#include <QWidget>
#include "includes.h"
#include <QPixmap>

class QToolButton;
class ZStateText : public QWidget
{
    Q_OBJECT
public:
    explicit ZStateText(QWidget *parent = nullptr);
    /*设置类型并重绘*/
    inline void setType(const BIT_State_Type& type){m_type=type;reDraw();}
    /*设置颜色和字体*/
    inline void setInfo(const QString& name, const QString& color){m_name=name;m_color.setNamedColor(color);reDraw();}
    inline void setText(const QString&text){m_name=text;}
    inline void setTextColor(const QString& color){m_color.setNamedColor(color);}
    inline void setPngPath(const QString& pngPath){m_png_path = pngPath;}
    /*重绘*/
    inline void reDraw(){this->update();}
signals:
protected:
    /*绘制*/
    void paintEvent(QPaintEvent *) override;
public slots:
private:
    int m_width = 26;
    BIT_State_Type m_type = BIT_State_OK;
    QColor m_color;
    QString m_name;
    QString m_png_path = "";
private:
    int __margin = 0;
};

#endif // ZSTATETEXT_H

ZStateText.cpp

#include "zstatetext.h"
#include <QPainter>
#include <QPixmap>

ZStateText::ZStateText(QWidget *parent) : QWidget(parent)
{
    m_color.setNamedColor("#A8A8A8");
    m_name = "离线/未知";
}

void ZStateText::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
    painter.setPen(QPen(m_color));
    painter.setBrush(m_color);
    QFont font;
    font.setFamily("Microsoft YaHei");
    painter.setFont(font);
    QRect textRect(m_width*2, 0, m_width*3, m_width);
    painter.drawText(textRect, Qt::AlignVCenter | Qt::AlignHCenter, m_name);
    if("" == m_png_path){
        painter.drawEllipse(QPointF(m_width, m_width/2+1), m_width/2-__margin, m_width/2-__margin);
    }else{
        QPixmap pix(m_png_path);
        painter.drawPixmap(0, 0, 30, 30, pix);
    }
}