128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
/*
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* Copyright (C) 2018 Tianjin KYLIN Information Technology Co., Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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**/
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#include "monitorwatcher.h"
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#include <QDir>
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#include <QFile>
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#include <QDebug>
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#include <stdio.h>
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#define DRM_DIR "/sys/class/drm/"
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MonitorWatcher::MonitorWatcher(QObject *parent)
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: QThread(parent),
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virtualSize(0, 0),
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monitorCount(0),
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firstDetect(true)
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{
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}
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MonitorWatcher::~MonitorWatcher()
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{
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requestInterruption();
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terminate();
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wait();
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}
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void MonitorWatcher::run()
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{
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QDir drmDir(DRM_DIR);
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QStringList drms = drmDir.entryList(QDir::Dirs);
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for(auto iter = drms.begin(); iter != drms.end(); ) {
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if((*iter).indexOf("card") == 0 || iter->length() > 5)
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iter++;
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else
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iter = drms.erase(iter);
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}
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FILE * fp = popen("xrandr", "r");
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Q_UNUSED(fp)
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/* 每隔3秒遍历一次显卡接口的连接状态 */
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while(!isInterruptionRequested()) {
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int width = 0;
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int height = 0;
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QMap<QString, QString> tmpStatus;
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for(const QString & drm : drms) {
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QFile drmStatusFile(DRM_DIR + drm + "/status");
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if(drmStatusFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
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QTextStream in(&drmStatusFile);
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QString status = in.readLine();
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tmpStatus[drm] = status;
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if(status == "connected") {
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QSize maxMode = getMonitorMaxSize(drm);
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width += maxMode.width();
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height = height > maxMode.height() ? height : maxMode.height();
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}
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}
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}
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if(drmStatus != tmpStatus) {
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drmStatus = tmpStatus;
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int count = 0;
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for(auto &pair : tmpStatus)
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if(pair == "connected")
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count++;
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qDebug() << "monitor count changed ---" << count;
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if(monitorCount != count) {
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monitorCount = count;
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if(!firstDetect) {
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firstDetect = false;
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Q_EMIT monitorCountChanged(count);
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}
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}
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FILE *fp = popen("xrandr", "r");
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Q_UNUSED(fp)
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}
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virtualSize = QSize(width, height);
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sleep(3);
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}
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}
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/**
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* 获取显示器的最大分辨率
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*/
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QSize MonitorWatcher::getMonitorMaxSize(const QString &drm)
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{
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int width = 0, height = 0;
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QFile drmModeFile(DRM_DIR + drm + "/modes");
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if(drmModeFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
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QTextStream in2(&drmModeFile);
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QString maxMode = in2.readLine();
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int xpos = maxMode.indexOf('x', 0);
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width = maxMode.left(xpos).toInt();
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int ipos = maxMode.indexOf('i', 0);
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if(ipos != -1)
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height = maxMode.mid(xpos+1, ipos-xpos-1).toInt();
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else
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height = maxMode.mid(xpos+1).toInt();
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}
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return QSize(width, height);
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}
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QSize MonitorWatcher::getVirtualSize()
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{
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return virtualSize;
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}
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int MonitorWatcher::getMonitorCount()
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{
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return monitorCount;
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}
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