Fixed logging

src/LogCompressor.cc

@@ -28,6 +28,8 @@ This file is part of the QGROUNDCONTROL project
  */
 
 #include <QFile>
+#include <QFileInfo>
+#include <QDir>
 #include <QTemporaryFile>
 #include <QTextStream>
 #include <QStringList>
@@ -64,14 +66,15 @@ void LogCompressor::run()
 
     QString outFileName;
 
-    QStringList parts =  QFileInfo(infile.fileName()).absoluteFilePath().split(".", QString::SkipEmptyParts);
+    QStringList parts = QFileInfo(infile.fileName()).absoluteFilePath().split(".", QString::SkipEmptyParts);
 
-    parts.replace(parts.size()-2, "compressed." + parts.last());
+    parts.replace(0, parts.first() + "_compressed");
+    parts.replace(parts.size()-1, "txt");
     outFileName = parts.join(".");
 
 	// Verify that the output file is useable
     QFile outTmpFile(outFileName);
-    if (!outTmpFile.open(QIODevice::WriteOnly | QIODevice::Text)) {
+    if (!outTmpFile.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate)) {
 		emit logProcessingStatusChanged(tr("Log Compressor: Cannot start/compress log file, since output file %1 is not writable").arg(QFileInfo(outTmpFile.fileName()).absoluteFilePath()));
 		return;
 	}

src/ui/linechart/LinechartPlot.cc

@@ -47,7 +47,7 @@ LinechartPlot::LinechartPlot(QWidget *parent, int plotid, quint64 interval): Qwt
     this->plotid = plotid;
     this->plotInterval = interval;
 
-    maxValue = DBL_MIN;
+    maxValue = -DBL_MAX;
     minValue = DBL_MAX;
 
     //lastMaxTimeAdded = QTime();

src/ui/linechart/LinechartWidget.cc

@@ -548,13 +548,13 @@ void LinechartWidget::startLogging()
     // Let user select the log file name
     //QDate date(QDate::currentDate());
     // QString("./pixhawk-log-" + date.toString("yyyy-MM-dd") + "-" + QString::number(logindex) + ".log")
-    QString fileName = QFileDialog::getSaveFileName(this, tr("Specify log file name"), QDesktopServices::storageLocation(QDesktopServices::DesktopLocation), tr("Logfile (*.csv *.txt);;"));
+    QString fileName = QFileDialog::getSaveFileName(this, tr("Specify log file name"), QDesktopServices::storageLocation(QDesktopServices::DesktopLocation), tr("Logfile (*.log);;"));
 
-    while (!(fileName.endsWith(".txt") || fileName.endsWith(".csv")) && !abort && fileName != "") {
+    while (!(fileName.endsWith(".log")) && !abort && fileName != "") {
         QMessageBox msgBox;
         msgBox.setIcon(QMessageBox::Critical);
         msgBox.setText("Unsuitable file extension for logfile");
-        msgBox.setInformativeText("Please choose .txt or .csv as file extension. Click OK to change the file extension, cancel to not start logging.");
+        msgBox.setInformativeText("Please choose .log as file extension. Click OK to change the file extension, cancel to not start logging.");
         msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
         msgBox.setDefaultButton(QMessageBox::Ok);
         if(msgBox.exec() != QMessageBox::Ok)
@@ -562,7 +562,7 @@ void LinechartWidget::startLogging()
             abort = true;
             break;
         }
-        fileName = QFileDialog::getSaveFileName(this, tr("Specify log file name"), QDesktopServices::storageLocation(QDesktopServices::DesktopLocation), tr("Logfile (*.txt *.csv);;"));
+        fileName = QFileDialog::getSaveFileName(this, tr("Specify log file name"), QDesktopServices::storageLocation(QDesktopServices::DesktopLocation), tr("Logfile (*.log);;"));
     }
 
     qDebug() << "SAVE FILE" << fileName;
@@ -570,7 +570,7 @@ void LinechartWidget::startLogging()
     // Check if the user did not abort the file save dialog
     if (!abort && fileName != "") {
         logFile = new QFile(fileName);
-        if (logFile->open(QIODevice::WriteOnly | QIODevice::Text)) {
+        if (logFile->open(QIODevice::Truncate | QIODevice::WriteOnly | QIODevice::Text)) {
             logging = true;
             logStartTime = 0;
             curvesWidget->setEnabled(false);