ukui-screensaver/Common/commonfunc.cpp

/*
 * Copyright (C) 2019 Tianjin KYLIN Information Technology Co., Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
**/

#include <QMimeType>
#include <QSettings>
#include <QMimeDatabase>
#include <QPainter>
#include <QPainterPath>
#include <QFileInfo>
#include <QFontMetrics>
#include "commonfunc.h"

bool ispicture(QString filepath)
{
	QFileInfo file(filepath);
	if(file.exists() == false)
		return false;

    QMimeDatabase db;
    QMimeType mime = db.mimeTypeForFile(filepath);
    return mime.name().startsWith("image/");
}

QString getSystemVersion()
{
    QSettings settings("/etc/lsb-release", QSettings::IniFormat);
    QString release = settings.value("DISTRIB_RELEASE").toString();
    QString description = settings.value("DISTRIB_DESCRIPTION").toString();
    if(description.right(3) == "LTS")
        release = release + " LTS";
    return release;
}

QString getSystemDistrib()
{
    QSettings settings("/etc/lsb-release", QSettings::IniFormat);
    QString distribId = settings.value("DISTRIB_ID").toString();
    return distribId;
}

bool getUseFirstDevice()
{
    QSettings settings("/etc/biometric-auth/ukui-biometric.conf", QSettings::IniFormat);
    return settings.value("UseFirstDevice").toBool();
}

commonFunc::commonFunc()
{

}

QString ElideText(QFont font,int width,QString strInfo)
{
    QFontMetrics fontMetrics(font);
    //如果当前字体下，字符串长度大于指定宽度
    if(fontMetrics.width(strInfo) > width)
    {
        strInfo= QFontMetrics(font).elidedText(strInfo, Qt::ElideRight, width);
    }
    return strInfo;
}

/*修改图片缩放机制，图片长宽不一致时，先取图片中央的部分*/
QPixmap scaledPixmap(QPixmap src)
{
    QPixmap rectPixmap;
    if (src.width() > src.height()) {
        QPixmap iconPixmap = src.copy((src.width() - src.height())/2, 0, src.height(), src.height());
        // 根据label高度等比例缩放图片
        rectPixmap = iconPixmap.scaledToHeight(src.height());
    } else {
        QPixmap iconPixmap = src.copy(0, (src.height() - src.width())/2, src.width(), src.width());
        // 根据label宽度等比例缩放图片
        rectPixmap = iconPixmap.scaledToWidth(src.width());
    }
    return rectPixmap;
}

QPixmap PixmapToRound(const QPixmap &src, int radius)
{
    if (src.isNull()) {
        return QPixmap();
    }

    QPixmap pixmapa(src);
    QPixmap pixmap(radius*2,radius*2);
    pixmap.fill(Qt::transparent);
    QPainter painter(&pixmap);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
    QPainterPath path;
    path.addEllipse(0, 0, radius*2, radius*2);
    painter.setClipPath(path);
    painter.drawPixmap(0, 0, radius*2, radius*2, pixmapa);
    return pixmap;
}