refactor: Introduce ApplicationController to centralize logic

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

src/ApplicationController.cpp

@@ -0,0 +1,122 @@
+#include "ApplicationController.h"
+#include "Document.h"
+#include "SketchFeature.h"
+#include "MainWindow.h"
+
+#include <QInputDialog>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <QDir>
+#include <QFileInfo>
+
+ApplicationController* ApplicationController::instance()
+{
+    static ApplicationController instance;
+    return &instance;
+}
+
+ApplicationController::ApplicationController(QObject *parent)
+    : QObject(parent)
+{
+    m_document = new Document(this);
+}
+
+ApplicationController::~ApplicationController()
+{
+}
+
+void ApplicationController::setMainWindow(MainWindow* mainWindow)
+{
+    m_mainWindow = mainWindow;
+}
+
+Document* ApplicationController::document() const
+{
+    return m_document;
+}
+
+void ApplicationController::newDocument()
+{
+    m_document->clear();
+    setCurrentFile(QString());
+}
+
+bool ApplicationController::openDocument()
+{
+    const QString fileName = QFileDialog::getOpenFileName(m_mainWindow);
+    if (!fileName.isEmpty()) {
+        if (!m_document->load(fileName)) {
+            QMessageBox::warning(m_mainWindow, tr("OpenCAD"),
+                                 tr("Cannot read file %1").arg(QDir::toNativeSeparators(fileName)));
+            return false;
+        }
+        setCurrentFile(fileName);
+        return true;
+    }
+    return false;
+}
+
+bool ApplicationController::saveDocument()
+{
+    if (m_currentFile.isEmpty()) {
+        return saveDocumentAs();
+    } else {
+        if (!m_document->save(m_currentFile)) {
+            QMessageBox::warning(m_mainWindow, tr("OpenCAD"),
+                                 tr("Cannot write file %1").arg(QDir::toNativeSeparators(m_currentFile)));
+            return false;
+        }
+        return true;
+    }
+}
+
+bool ApplicationController::saveDocumentAs()
+{
+    QFileDialog dialog(m_mainWindow);
+    dialog.setWindowModality(Qt::WindowModal);
+    dialog.setAcceptMode(QFileDialog::AcceptSave);
+    if (dialog.exec() != QDialog::Accepted)
+        return false;
+
+    const QString fileName = dialog.selectedFiles().first();
+    setCurrentFile(fileName);
+    return saveDocument();
+}
+
+void ApplicationController::beginSketchCreation()
+{
+    QStringList items;
+    items << "XY-Plane" << "XZ-Plane" << "YZ-Plane";
+
+    bool ok;
+    QString item = QInputDialog::getItem(m_mainWindow, "Select Sketch Plane",
+                                         "Plane:", items, 0, false, &ok);
+    if (ok && !item.isEmpty()) {
+        auto feature = new SketchFeature("Sketch");
+        ViewportWidget::SketchPlane plane;
+        if (item == "XY-Plane") {
+            plane = ViewportWidget::SketchPlane::XY;
+            feature->setPlane(SketchFeature::SketchPlane::XY);
+        } else if (item == "XZ-Plane") {
+            plane = ViewportWidget::SketchPlane::XZ;
+            feature->setPlane(SketchFeature::SketchPlane::XZ);
+        } else { // "YZ-Plane"
+            plane = ViewportWidget::SketchPlane::YZ;
+            feature->setPlane(SketchFeature::SketchPlane::YZ);
+        }
+        m_document->addFeature(feature);
+        emit sketchModeStarted(plane);
+    }
+}
+
+void ApplicationController::endSketch()
+{
+    emit sketchModeEnded();
+}
+
+void ApplicationController::setCurrentFile(const QString& fileName)
+{
+    m_currentFile = fileName;
+    m_document->setFileName(fileName);
+    emit currentFileChanged(m_currentFile);
+}