Support dragonx debug log and custom number of lines

src/mainwindow.cpp

@@ -1986,16 +1986,17 @@ void MainWindow::setupMiningTab() {
     }
 }
 
-QString MainWindow::readDebugLines() {
+QString MainWindow::readDebugLines(uint32_t lines) {
+    QString coin = isdragonx ? "DRAGONX" : "HUSH3";
 #ifdef Q_OS_LINUX
-    QFile file(QDir::homePath() + "/.hush/HUSH3/debug.log");
+    QFile file(QDir::homePath() + "/.hush/" + coin + "/debug.log");
 #elif defined(Q_OS_DARWIN)
-    QFile file(QDir::homePath() + "/Library/Application Support/Hush/HUSH3/debug.log");
+    QFile file(QDir::homePath() + "/Library/Application Support/Hush/" + coin + "/debug.log");
 #elif defined(Q_OS_WIN64)
-    QFile file(QDir::homePath() + "/AppData/Roaming/Hush/HUSH3/debug.log");
+    QFile file(QDir::homePath() + "/AppData/Roaming/Hush/" + coin + "/debug.log");
 #else
     // Bless Your Heart, You Like Danger!
-    QFile file("~/.hush/HUSH3/debug.log");
+    QFile file(QDir::homePath() + "/.hush/" + coin + "/debug.log");
 #endif // Q_OS_LINUX
     if(file.exists()) {
         DEBUG(": Found debug.log at " << file);
@@ -2008,9 +2009,12 @@ QString MainWindow::readDebugLines() {
     {
         qint64 fileSize = file.size();
         DEBUG("debug.log size=" << fileSize);
+        if(fileSize < 2) {
+            DEBUG("debug.log is too small");
+            return "";
+        }
         file.seek(file.size()-1);
-        int count = 0;
-        int lines = 100;
+        uint32_t count = 0;
         while ( (count < lines) && (file.pos() > 0) )
         {
             QString ch = file.read(1);
@@ -2032,8 +2036,10 @@ void MainWindow::setupDebugLogTab() {
     ui->debugLog->setPlainText("Loading debug log...");
 
     QObject::connect(ui->refreshDebugButton, &QPushButton::clicked, [=] () {
-        DEBUG("refresh debug log clicked");
-        ui->debugLog->setPlainText( readDebugLines() );
+        uint32_t debugLines = ui->debugLines->text().trimmed().toInt();
+        if (debugLines == 0) { debugLines = 50; }
+        DEBUG("refresh debug log clicked with debugLines=" << debugLines);
+        ui->debugLog->setPlainText( readDebugLines(debugLines) );
     });
 
     ui->debugLog->setPlainText( readDebugLines() );

src/mainwindow.h

@@ -85,7 +85,7 @@ private:
     void closeEvent(QCloseEvent* event);
 
 
-    QString readDebugLines();
+    QString readDebugLines(uint32_t lines = 50);
     void setupSendTab();
     void setupPeersTab();
     void setupTransactionsTab();

src/mainwindow.ui

@@ -1164,7 +1164,24 @@
                       </property>
                      </widget>
        </item>
-       <item row="1" column="0" colspan="3">
+        <item row="0" column="1">
+        <widget class="QLabel" name="debugLabel">
+               <property name="text">
+                <string>Number of lines to show</string>
+               </property>
+        </widget>
+        </item>
+        <item row="0" column="2">
+        <widget class="QLineEdit" name="debugLines">
+                      <property name="enabled">
+                       <bool>true</bool>
+                      </property>
+                      <property name="placeholderText">
+                       <string>50</string>
+                      </property>
+        </widget>
+        </item>
+       <item row="1" column="0" colspan="4">
         <widget class="QPlainTextEdit" name="debugLog">
          <property name="plainText">
           <string/>