mainwidget.cpp

#include "mainwidget.h"
//#include <DFontSizeManager>
//#include <DGuiApplicationHelper>

//DGUI_USE_NAMESPACE

MainWidget::MainWidget()
{
    //setMinimumSize(5,5);
    //设置等宽字体
    font.setFamily("Noto Mono");
    // 获取dpi，一般默认都是96，根据dpi进行字体的缩放，直接设置pointsize无法解决hidpi问题
    dpi = QApplication::primaryScreen()->logicalDotsPerInch();
    qDebug()<<"!!创建新的文字ui";
    Label=new QLabel();
    Label->setAlignment(Qt::AlignCenter);
    font.setPixelSize((dpi*9)/72);
    Label->setFont(font);
    QString style;
    style=QString("QLabel {color: %1;}").arg("#000");
    Label->setStyleSheet(style);
    Label->setVisible(true);
    Label->setText(QString("SELF_STARTUP"));

    centralLayout = new QBoxLayout(QBoxLayout::LeftToRight);
    centralLayout->addWidget(Label);
    centralLayout->setMargin(0);
    centralLayout->setSpacing(4);
    setLayout(centralLayout);
    qDebug()<<"out mainwidget";
}


MainWidget::~MainWidget()
{
    if(centralLayout!=NULL)
    {
        delete centralLayout;
        centralLayout=NULL;
    }
}

QSize MainWidget::sizeHint() const
{
    if(centralLayout==NULL)return QSize(100,30);
    int w,h;
    w=QFontMetrics(font).boundingRect(QString("SELF_STARTUP")).size().width();
    h=QFontMetrics(font).boundingRect(QString("SELF_STARTUP")).size().height();
    QSize size(w,h);
    //qDebug()<<size;
    //qDebug()<<QString("width:%1    height:%2").arg(width()).arg(height());
    return size;
}