qt介绍自定义插件三

news/2025/3/19 6:34:32/

代码结构

主要编写这两个文件

#ifndef TBATTERY_H
#define TBATTERY_H#include <QWidget>
#include <QtUiPlugin/QDesignerExportWidget>
class QDESIGNER_WIDGET_EXPORT TBattery : public QWidget
{Q_OBJECT
private:QColor colorBackground=Qt::white;QColor colorBorder=Qt::black;QColor colorPower=Qt::green;QColor colorWarning=Qt::red;int m_powerLevel=60;//当前电量,0-100int m_warnLevel=20;
public:explicit TBattery(QWidget *parent = nullptr);int powerLevel() const;void setPowerLevel(int newPowerLevel);int warnLevel() const;void setWarnLevel(int newWarnLevel);signals:// QWidget interface
protected:virtual void paintEvent(QPaintEvent *event) override;
};#endif // TBATTERY_H

#include "tbattery.h"
#include <QPainter>
#include <QPaintEvent>
void TBattery::paintEvent(QPaintEvent *event)
{QPainter painter(this);QRect rect(0,0,width(),height());painter.setViewport(rect);//视口，绝对坐标painter.setWindow(0,0,120,50);//窗口，逻辑坐标（映射到上面的坐标）painter.setRenderHint(QPainter::Antialiasing);painter.setRenderHint(QPainter::TextAntialiasing);//绘制电池QPen pen(colorBorder);pen.setWidth(2);pen.setStyle(Qt::SolidLine);pen.setCapStyle(Qt::FlatCap);pen.setJoinStyle(Qt::BevelJoin);painter.setPen(pen);QBrush brush(colorBackground);brush.setStyle(Qt::SolidPattern);painter.setBrush(brush);rect.setRect(1,1,109,48);painter.drawRect(rect);//绘制边框brush.setColor(colorBorder);painter.setBrush(brush);rect.setRect(110,15,10,20);painter.drawRect(rect);//绘制正极if(m_powerLevel>m_warnLevel){brush.setColor(colorPower);pen.setColor(colorPower);}else{brush.setColor(colorWarning);pen.setColor(colorWarning);}painter.setPen(pen);painter.setBrush(brush);if(m_powerLevel>0){rect.setRect(5,5,m_powerLevel,40);painter.drawRect(rect);}QString powStr=QString::asprintf("%d%%",m_powerLevel);QFontMetrics textSize(this->font());QRect textRect=textSize.boundingRect(powStr);painter.setFont(this->font());pen.setColor(colorBorder);painter.setPen(pen);painter.drawText(55-textRect.width()/2,25+textRect.height()/2,powStr);event->accept();
}int TBattery::powerLevel() const
{return m_powerLevel;
}void TBattery::setPowerLevel(int newPowerLevel)
{m_powerLevel = newPowerLevel;repaint();
}int TBattery::warnLevel() const
{return m_warnLevel;
}void TBattery::setWarnLevel(int newWarnLevel)
{m_warnLevel = newWarnLevel;repaint();
}TBattery::TBattery(QWidget *parent): QWidget{parent}
{}

生成的dll文件(debug/和release都可以)

放到这个路径下