completed

src/icons.qrc

@@ -0,0 +1,7 @@
+<RCC>
+    <qresource prefix="/">
+        <file>icons/media-playback-pause.png</file>
+        <file>icons/media-playback-start.png</file>
+        <file>icons/media-playback-stop.png</file>
+    </qresource>
+</RCC>

src/mainwindow.cpp

@@ -1,14 +1,57 @@
 #include "mainwindow.h"
-#include "ui_mainwindow.h"
+#include "qt5/ui_mainwindow.h"
+#include "pointgenerator.h"
 
-MainWindow::MainWindow(QWidget *parent) :
+
-    QMainWindow(parent),
+MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) {
-    ui(new Ui::MainWindow)
-{
 	ui->setupUi(this);
+	ui->buttonPause->setEnabled(false);
+	ui->buttonStart->setEnabled(true);
+	ui->buttonStop->setEnabled(false);
+	generator = new PointGenerator();
+	connect(generator, &PointGenerator::newPoints, this, [this](QVector<QPointF> points){
+		if (generator->isRunning() && !generator->isPause()) ui->graphic->setGraphicData(points);
+	}, Qt::QueuedConnection);
+	connect(generator, &PointGenerator::finished, this, [this](){
+		ui->graphic->clear();
+		ui->graphic->update(true);
+	});
 }
 
-MainWindow::~MainWindow()
+
-{
+MainWindow::~MainWindow() {
+	stopGenerator();
+	delete generator;
 	delete ui;
 }
+
+
+void MainWindow::on_buttonStart_clicked() {
+	if (!generator->isRunning()) generator->start();
+	ui->buttonPause->setEnabled(true);
+	ui->buttonStart->setEnabled(false);
+	ui->buttonStop->setEnabled(true);
+}
+
+
+void MainWindow::on_buttonStop_clicked() {
+	stopGenerator();
+	ui->buttonPause->setEnabled(false);
+	ui->buttonStart->setEnabled(true);
+	ui->buttonStop->setEnabled(false);
+}
+
+
+void MainWindow::on_buttonPause_clicked() {
+	if (generator->isPause()) generator->resume();
+	else generator->pause();
+	ui->graphic->update(true);
+}
+
+
+void MainWindow::stopGenerator() {
+	generator->requestInterruption();
+	if (generator->isPause()) generator->resume();
+	generator->wait();
+	ui->buttonPause->setChecked(false);
+}

src/mainwindow.h

@@ -3,20 +3,30 @@
 
 #include <QMainWindow>
 
+
 namespace Ui {
 class MainWindow;
 }
+class PointGenerator;
+
 
 class MainWindow : public QMainWindow
 {
 	Q_OBJECT
-
 public:
 	explicit MainWindow(QWidget *parent = nullptr);
 	~MainWindow();
 
+private slots:
+	void on_buttonStart_clicked();
+	void on_buttonStop_clicked();
+	void on_buttonPause_clicked();
+
 private:
+	void stopGenerator();
+
 	Ui::MainWindow *ui;
+	PointGenerator * generator;
 };
 
 #endif // MAINWINDOW_H

src/mainwindow.ui

@@ -1,9 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
- <author/>
- <comment/>
- <exportmacro/>
  <class>MainWindow</class>
- <widget name="MainWindow" class="QMainWindow">
+ <widget class="QMainWindow" name="MainWindow">
   <property name="geometry">
    <rect>
     <x>0</x>
@@ -13,12 +11,110 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>MainWindow</string>
+   <string>Strata Solutions Test</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="Graphic" name="graphic">
+      <property name="graphicPointWidth">
+       <double>4.000000000000000</double>
+      </property>
+      <property name="graphicPointsEnabled">
+       <bool>true</bool>
+      </property>
+      <property name="buttons">
+       <set>Graphic::Autofit|Graphic::Configure|Graphic::CursorAxis|Graphic::Fullscreen|Graphic::Save</set>
+      </property>
+      <property name="antialiasing">
+       <bool>true</bool>
+      </property>
+      <property name="statusVisible">
+       <bool>false</bool>
+      </property>
+      <property name="historySize">
+       <double>-1.000000000000000</double>
       </property>
-  <widget name="menubar" class="QMenuBar"/>
-  <widget name="centralwidget" class="QWidget"/>
-  <widget name="statusbar" class="QStatusBar"/>
      </widget>
- <pixmapfunction/>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <spacer name="horizontalSpacer_2">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+      <item>
+       <widget class="QPushButton" name="buttonStart">
+        <property name="text">
+         <string>Start</string>
+        </property>
+        <property name="icon">
+         <iconset resource="icons.qrc">
+          <normaloff>:/icons/media-playback-start.png</normaloff>:/icons/media-playback-start.png</iconset>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="buttonPause">
+        <property name="text">
+         <string>Pause</string>
+        </property>
+        <property name="icon">
+         <iconset resource="icons.qrc">
+          <normaloff>:/icons/media-playback-pause.png</normaloff>:/icons/media-playback-pause.png</iconset>
+        </property>
+        <property name="checkable">
+         <bool>true</bool>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QPushButton" name="buttonStop">
+        <property name="text">
+         <string>Stop</string>
+        </property>
+        <property name="icon">
+         <iconset resource="icons.qrc">
+          <normaloff>:/icons/media-playback-stop.png</normaloff>:/icons/media-playback-stop.png</iconset>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>Graphic</class>
+   <extends>QFrame</extends>
+   <header>graphic.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources>
+  <include location="icons.qrc"/>
+ </resources>
  <connections/>
 </ui>

src/pointgenerator.h

@@ -0,0 +1,50 @@
+#ifndef POINTGENERATOR_H
+#define POINTGENERATOR_H
+#include <QThread>
+#include <QMutex>
+#include <QRandomGenerator>
+#include <QPointF>
+
+
+class PointGenerator : public QThread {
+	Q_OBJECT
+public:
+	void pause() {
+		mutex_pause.lock();
+		is_pause = true;
+	}
+
+	void resume() {
+		is_pause = false;
+		mutex_pause.unlock();
+	}
+
+	bool isPause() const {return is_pause;}
+
+private:
+	void run() override {
+		is_pause = false;
+		while(!isInterruptionRequested()) {
+			QThread::msleep(1);
+			QVector<QPointF> v;
+			v.resize(100);
+			for (QPointF & p : v) {
+				p = QPointF(QRandomGenerator::global()->generateDouble(),
+							QRandomGenerator::global()->generateDouble());
+			}
+			emit newPoints(v);
+			if (is_pause) {
+				mutex_pause.lock();
+				mutex_pause.unlock();
+			}
+		}
+	}
+
+	QMutex mutex_pause;
+	std::atomic_bool is_pause;
+
+signals:
+	void newPoints(QVector<QPointF> points);
+};
+
+#endif // POINTGENERATOR_H