Qt设置字符串太长，使用省略号显示

àì夳堔傛蜴生んèń 2024-04-17 21:39 56阅读 0赞

# 1.运行截图 #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70][]

# 2.源码 #

#ifndef WIDGET_H
    #define WIDGET_H
    
    #include <QWidget>
    #include <QList>
    
    namespace Ui {
    class Widget;
    }
    
    
    class Widget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit Widget(QWidget *parent = 0);
        ~Widget();
    public:
        QString getElidedText(QFont font, QString str, int MaxWidth);
    
    private:
        Ui::Widget *ui;
    
    };
    
    #endif // WIDGET_H

#include "widget.h"
    #include "ui_widget.h"
    #include <QFont>
    
    const int g_maxValue = 50;
    
    Widget::Widget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::Widget)
    {
        ui->setupUi(this);
        ui->label->setAlignment(Qt::AlignCenter);
        ui->label->setFixedWidth(g_maxValue);
        ui->label->setFixedHeight(30);
        ui->label->setStyleSheet("background-color: rgb(0, 255, 0);");
        ui->label->setFont(QFont("微软雅黑",10));
    
        QString str = QString("一二三四五");
    
        QString txt = getElidedText(ui->label->font(), str, g_maxValue);
    
        ui->label->setText(txt);
        ui->label->setToolTip(str);
    
    
    }
    
    Widget::~Widget()
    {
        delete ui;
    }
    
    QString Widget::getElidedText(QFont font, QString str, int MaxWidth)
    {
        if (str.isEmpty())
        {
            return "";
        }
    
        QFontMetrics fontWidth(font);
    
        //计算字符串宽度
        int width = fontWidth.width(str); 
    
        //当字符串宽度大于最大宽度时进行转换
        if (width >= MaxWidth)
        {
            //右部显示省略号
            str = fontWidth.elidedText(str, Qt::ElideRight, MaxWidth);  
        }
    
        //返回处理后的字符串
        return str;   
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/17/0e29b44e0eb3460a8331f2e6ec0fb660.png