[d] Add GUI interface and log function

dfssd/gui/application.qrc

 <RCC>
     <qresource prefix="/">
+        <file>widget.ui</file>
     </qresource>
 </RCC>

dfssd/gui/widget.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CalculatorForm</class>
+ <widget class="QWidget" name="CalculatorForm">
+  <property name="enabled">
+   <bool>true</bool>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>751</width>
+    <height>595</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="windowTitle">
+   <string>Calculator Builder</string>
+  </property>
+  <layout class="QGridLayout">
+   <property name="margin">
+    <number>9</number>
+   </property>
+   <property name="spacing">
+    <number>6</number>
+   </property>
+   <item row="0" column="0">
+    <layout class="QVBoxLayout" name="verticalLayout">
+     <item>
+      <widget class="QGraphicsView" name="graphicsView">
+       <property name="minimumSize">
+        <size>
+         <width>700</width>
+         <height>300</height>
+        </size>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <property name="topMargin">
+        <number>5</number>
+       </property>
+       <property name="bottomMargin">
+        <number>5</number>
+       </property>
+       <item>
+        <widget class="QPushButton" name="playButton">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="text">
+          <string>Play</string>
+         </property>
+         <property name="default">
+          <bool>true</bool>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="replayButton">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="text">
+          <string>Replay</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLabel" name="quantumLabel">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="text">
+          <string>Quantum:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSpinBox" name="quantumField">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="suffix">
+          <string> us</string>
+         </property>
+         <property name="minimum">
+          <number>1</number>
+         </property>
+         <property name="maximum">
+          <number>1000000</number>
+         </property>
+         <property name="singleStep">
+          <number>100</number>
+         </property>
+         <property name="value">
+          <number>1000</number>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QLabel" name="speedLabel">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="text">
+          <string>Speed:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QSlider" name="speedSlider">
+         <property name="sizePolicy">
+          <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
+           <horstretch>0</horstretch>
+           <verstretch>0</verstretch>
+          </sizepolicy>
+         </property>
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="tickPosition">
+          <enum>QSlider::TicksBothSides</enum>
+         </property>
+         <property name="tickInterval">
+          <number>5</number>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <widget class="QTextEdit" name="logField">
+       <property name="maximumSize">
+        <size>
+         <width>16777215</width>
+         <height>200</height>
+        </size>
+       </property>
+       <property name="font">
+        <font>
+         <family>Courier</family>
+         <pointsize>10</pointsize>
+        </font>
+       </property>
+       <property name="verticalScrollBarPolicy">
+        <enum>Qt::ScrollBarAlwaysOn</enum>
+       </property>
+       <property name="undoRedoEnabled">
+        <bool>false</bool>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+       <property name="acceptRichText">
+        <bool>false</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

dfssd/gui/window.go

+package gui
+
+import (
+	"dfss"
+	"github.com/visualfc/goqt/ui"
+)
+
+type Window struct {
+	*ui.QMainWindow
+
+	logField *ui.QTextEdit
+}
+
+func NewWindow() *Window {
+	file := ui.NewFileWithName(":/widget.ui")
+	loader := ui.NewUiLoader()
+	widget := loader.Load(file)
+
+	// Init main window
+	window := ui.NewMainWindow()
+	window.SetCentralWidget(widget)
+	window.SetWindowTitle("DFSS Demonstrator v" + dfss.Version)
+
+	w := &Window{
+		QMainWindow: window,
+	}
+
+	// Load dynamic elements from driver
+	w.logField = ui.NewTextEditFromDriver(widget.FindChild("logField"))
+
+	// Add actions
+	w.addActions()
+
+	w.StatusBar().ShowMessage("Ready")
+	return w
+}
+
+func (w *Window) Log(str string) {
+	w.logField.Append(str)
+	w.logField.EnsureCursorVisible()
+}
+
+func (w *Window) addActions() {
+	openAct := ui.NewActionWithTextParent("&Open", w)
+	openAct.SetShortcuts(ui.QKeySequence_Open)
+	openAct.SetStatusTip("Open a demonstration file")
+
+	saveAct := ui.NewActionWithTextParent("&Save", w)
+	saveAct.SetShortcuts(ui.QKeySequence_Save)
+	saveAct.SetStatusTip("Save a demonstration file")
+
+	w.MenuBar().AddAction(openAct)
+	w.MenuBar().AddAction(saveAct)
+}

dfssd/main.go

@@ -9,6 +9,8 @@ import (
 
 	"dfss"
 	"dfss/dfssd/server"
+	"dfss/dfssd/gui"
+	"github.com/visualfc/goqt/ui"
 )
 
 var (
@@ -49,10 +51,23 @@ func main() {
 	case "version":
 		fmt.Println("v"+dfss.Version, runtime.GOOS, runtime.GOARCH)
 	case "nogui":
-		err := server.Listen("0.0.0.0:" + strconv.Itoa(port))
+		lfn := func(str string) {
+			fmt.Println(str)
+		}
+		err := server.Listen("0.0.0.0:" + strconv.Itoa(port), lfn)
 		if err != nil {
 			os.Exit(1)
 		}
 	default:
+		ui.Run(func() {
+			window := gui.NewWindow()
+			go func() {
+				err := server.Listen("0.0.0.0:" + strconv.Itoa(port), window.Log)
+				if err != nil {
+					window.Log("!! " + err.Error())
+				}
+			}()
+			window.Show()
+		})
 	}
 }

dfssd/server/server.go

 package server
 
 import (
-	"log"
 	"net"
 
 	api "dfss/dfssd/api"
@@ -21,17 +20,17 @@ func (s *Server) SendLog(ctx context.Context, in *api.Log) (*api.Ack, error) {
 }
 
 // Listen with gRPG service
-func Listen(addrPort string) error {
+func Listen(addrPort string, lfn func(string)) error {
 	// open tcp socket
 	lis, err := net.Listen("tcp", addrPort)
 	if err != nil {
 		grpclog.Fatalf("Failed to open tcp socket: %v", err)
 		return err
 	}
-	log.Printf("Server listening on %s", addrPort)
+	lfn("Server listening on " + addrPort)
 
 	// log display manager
-	go displayHandler()
+	go displayHandler(lfn)
 
 	// bootstrap gRPC service !
 	grpcServer := grpc.NewServer()

dfssd/server/storage.go

 package server
 
 import (
-	"log"
+	"fmt"
 	"sort"
 	"sync"
 	"time"
@@ -23,7 +23,7 @@ func addMessage(msg *api.Log) {
 }
 
 // display logs that are more than since (ms) old
-func display(since int64) {
+func display(since int64, lfn func(string)) {
 	var out []*api.Log      // sorted messages to display
 	var recycled []*api.Log // messages too recent to be displayed
 
@@ -45,15 +45,15 @@ func display(since int64) {
 	sort.Sort(ByTimestamp(out))
 
 	for _, v := range out {
-		log.Printf("[%d] %s:: %s", v.Timestamp, v.Identifier, v.Log)
+		lfn(fmt.Sprintf("[%d] %s:: %s", v.Timestamp, v.Identifier, v.Log))
 	}
 }
 
 // refresh every second
-func displayHandler() {
+func displayHandler(lfn func(string)) {
 	ticker := time.NewTicker(time.Second)
 	for range ticker.C {
-		display(1000)
+		display(1000, lfn)
 	}
 }