feat: show fake data network, stream, and particles data

src/MainWindow.cpp

@@ -8,6 +8,8 @@
 #include "settingsdialog.h"
 #include "ui_mainwindow.h"
 #include <QApplication>
+#include <QHeaderView>
+#include <QItemSelectionModel>
 #include <QLabel>
 #include <QMenu>
 #include <QSystemTrayIcon>
@@ -15,7 +17,7 @@
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent), m_trayIcon(nullptr), m_authManager(new AuthManager(this)), m_settingsDialog(nullptr),
-      m_authDialog(nullptr)
+      m_authDialog(nullptr), m_data(nullptr), m_networkStreamModel(nullptr), m_particleListModel(nullptr)
 {
   m_authDialog = new AuthDialog(m_authManager, this);
 
@@ -27,6 +29,8 @@ MainWindow::MainWindow(QWidget *parent)
   ui->splitter->setStretchFactor(1, 1);
   ui->splitter->setStretchFactor(2, 2);
 
+  setupModels();
+
   m_authDialog->setModal(true);
 
   QTimer::singleShot(3000, this, [this]() {
@@ -95,3 +99,69 @@ void MainWindow::on_settingsButton_clicked()
   }
   m_settingsDialog->show();
 }
+
+void MainWindow::setupModels()
+{
+  // Create data with fake data
+  m_data = new Data(this);
+
+  // Create and set tree model
+  m_networkStreamModel = new NetworkStreamModel(m_data, this);
+  ui->topLevelParticlesView->setModel(m_networkStreamModel);
+  ui->topLevelParticlesView->setHeaderHidden(true);
+  ui->topLevelParticlesView->expandAll();
+
+  // Configure column behavior: name stretches, unseen count is fixed width
+  ui->topLevelParticlesView->header()->setStretchLastSection(false);
+  ui->topLevelParticlesView->header()->setSectionResizeMode(0, QHeaderView::Stretch);
+  ui->topLevelParticlesView->header()->setSectionResizeMode(1, QHeaderView::Fixed);
+  ui->topLevelParticlesView->setColumnWidth(1, 40);
+
+  // Create and set list model
+  m_particleListModel = new ParticleListModel(m_data, this);
+  ui->particlesView->setModel(m_particleListModel);
+
+  // Connect selection changes
+  connect(ui->topLevelParticlesView->selectionModel(),
+          &QItemSelectionModel::selectionChanged,
+          this,
+          &MainWindow::onTreeSelectionChanged);
+}
+
+void MainWindow::onTreeSelectionChanged(
+    const QItemSelection &selected,
+    const QItemSelection &deselected)
+{
+  Q_UNUSED(deselected);
+
+  if (selected.indexes().isEmpty())
+  {
+    m_particleListModel->setStreamId(QString());
+    return;
+  }
+
+  QModelIndex index = selected.indexes().first();
+
+  if (m_networkStreamModel->isStreamItem(index))
+  {
+    QString streamId = m_networkStreamModel->streamIdFromIndex(index);
+    m_particleListModel->setStreamId(streamId);
+
+    // Auto-select first unseen particle (or first particle if all seen)
+    int unseenRow = m_particleListModel->firstUnseenRow();
+    if (unseenRow >= 0)
+    {
+      ui->particlesView->setCurrentIndex(m_particleListModel->index(unseenRow, 0));
+      ui->particlesView->setFocus();
+    }
+    else if (m_particleListModel->rowCount() > 0)
+    {
+      ui->particlesView->setCurrentIndex(m_particleListModel->index(0, 0));
+      ui->particlesView->setFocus();
+    }
+  }
+  else
+  {
+    m_particleListModel->setStreamId(QString());
+  }
+}