Add a dialog that shows the engine log

PrinterApplication.py

@@ -239,6 +239,15 @@ class PrinterApplication(QtApplication):
             job.finished.connect(lambda j: node.setMeshData(j.getResult()))
             job.start()
 
+    @pyqtSlot(result=str)
+    def getEngineLog(self):
+        log = ""
+
+        for entry in self.getBackend().getLog():
+            log += entry.decode()
+
+        return log
+
     def _onActiveMachineChanged(self):
         machine = self.getActiveMachine()
         if machine:

qml/EngineLog.qml

@@ -0,0 +1,41 @@
+import QtQuick 2.2
+import QtQuick.Dialogs 1.2
+import QtQuick.Controls 1.2
+import QtQuick.Layouts 1.1
+
+Dialog {
+    id: dialog
+
+    title: qsTr("Cura Engine Log");
+
+    standardButtons: StandardButton.Close;
+    modality: Qt.NonModal;
+
+    width: 640;
+
+    TextArea {
+        id: textArea
+
+        anchors.left: parent.left;
+        anchors.right: parent.right;
+
+        implicitHeight: 480;
+    }
+
+    onVisibleChanged: {
+        if(visible) {
+            textArea.text = Printer.getEngineLog();
+            updateTimer.start();
+        } else {
+            updateTimer.stop();
+        }
+    }
+
+    Timer {
+        id: updateTimer;
+        interval: 1000;
+        running: false;
+        repeat: true;
+        onTriggered: textArea.text = Printer.getEngineLog();
+    }
+}

qml/Printer.qml

@@ -116,6 +116,7 @@ UM.MainWindow {
                 //: Help menu
                 title: qsTr("&Help");
 
+                MenuItem { action: actions.showEngineLog; }
                 MenuItem { action: actions.documentation; }
                 MenuItem { action: actions.reportBug; }
                 MenuSeparator { }
@@ -300,6 +301,7 @@ UM.MainWindow {
 
         documentation.onTriggered: Qt.openUrlExternally("https://ultimaker.com/en/support");
         reportBug.onTriggered: Qt.openUrlExternally("https://github.com/Ultimaker/PluggableCura/issues");
+        showEngineLog.onTriggered: engineLog.open();
     }
 
     Menu {
@@ -372,6 +374,10 @@ UM.MainWindow {
         }
     }
 
+    EngineLog {
+        id: engineLog;
+    }
+
     AddMachineWizard {
         id: addMachine;
     }

qml/PrinterActions.qml

@@ -25,6 +25,8 @@ Item {
     property alias configureMachines: settingsAction;
 
     property alias preferences: preferencesAction;
+
+    property alias showEngineLog: showEngineLogAction;
     property alias documentation: documentationAction;
     property alias reportBug: reportBugAction;
     property alias about: aboutAction;
@@ -169,4 +171,11 @@ Item {
         iconName: "document-save";
         shortcut: StandardKey.Save;
     }
+
+    Action {
+        id: showEngineLogAction;
+        //: Show engine log action
+        text: qsTr("Show engine log...");
+        iconName: "view-list-text";
+    }
 }