From b52ae808b85870094a9ce475e5304be85797590d Mon Sep 17 00:00:00 2001
From: AndreaRigoni <andrea.rigoni@igi.cnr.it>
Date: Sun, 22 Mar 2026 13:55:06 +0000
Subject: [PATCH] qcanvas passage

---
 src/Root/QCanvas.cpp               | 58 +++++++++++++++++++++++++++++-
 src/Root/QCanvas.h                 |  8 +++--
 src/Root/testing/root_api_test.cpp | 33 +++++++++++++++++
 3 files changed, 95 insertions(+), 4 deletions(-)
 create mode 100644 src/Root/testing/root_api_test.cpp

diff --git a/src/Root/QCanvas.cpp b/src/Root/QCanvas.cpp
index a18100d..a1d58b3 100644
--- a/src/Root/QCanvas.cpp
+++ b/src/Root/QCanvas.cpp
@@ -17,6 +17,12 @@
 #include <Gtypes.h>
 #include <TVirtualX.h>
 #include <TEnv.h>
+#include <QMenu>
+#include <QAction>
+#include <TClass.h>
+#include <TMethod.h>
+#include <TList.h>
+#include <TInterpreter.h>
 
 namespace uLib {
 namespace Root {
@@ -116,9 +122,14 @@ void QCanvas::mousePressEvent(QMouseEvent* event) {
             case Qt::LeftButton:
                 m_canvas->HandleInput(kButton1Down, pos.x(), pos.y());
                 break;
-            case Qt::RightButton:
+            case Qt::RightButton: {
                 m_canvas->HandleInput(kButton3Down, pos.x(), pos.y());
+                TObject *obj = m_canvas->GetSelected();
+                if (obj) {
+                    ShowContextMenu(obj, event->globalPosition().toPoint());
+                }
                 break;
+            }
             case Qt::MiddleButton:
                 m_canvas->HandleInput(kButton2Down, pos.x(), pos.y());
                 break;
@@ -128,6 +139,51 @@ void QCanvas::mousePressEvent(QMouseEvent* event) {
     }
 }
 
+void QCanvas::ShowContextMenu(TObject* obj, const QPoint& globalPos) {
+    if (!obj) return;
+    
+    QMenu menu(this);
+    menu.setTitle(obj->GetName());
+    
+    TClass* cl = obj->IsA();
+    if (!cl) return;
+    
+    TList* methods = cl->GetListOfMethods();
+    if (!methods) return;
+    
+    TIter next(methods);
+    TObject* m_obj;
+    while ((m_obj = next())) {
+        TMethod* method = (TMethod*)m_obj;
+        if (method->IsMenuItem()) {
+            QString label = QString::fromStdString(method->GetName());
+            if (strlen(method->GetTitle()) > 0) {
+                label += " (" + QString::fromStdString(method->GetTitle()) + ")";
+            }
+            
+            QAction* action = menu.addAction(label);
+            connect(action, &QAction::triggered, [this, obj, method]() {
+                // For now, only support methods without arguments for simplicity
+                // or methods that can be called via TInterpreter
+                if (method->GetNargs() == 0) {
+                    obj->Execute((char*)method->GetName(), (char*)"");
+                    if (m_canvas) {
+                        m_canvas->Modified();
+                        m_canvas->Update();
+                    }
+                } else {
+                    // TODO: Handle methods with arguments if needed
+                    std::cout << "DEBUG: Method " << method->GetName() << " requires arguments." << std::endl;
+                }
+            });
+        }
+    }
+    
+    if (!menu.actions().isEmpty()) {
+        menu.exec(globalPos);
+    }
+}
+
 void QCanvas::mouseReleaseEvent(QMouseEvent* event) {
     if (m_canvas) {
         auto pos = event->position();
diff --git a/src/Root/QCanvas.h b/src/Root/QCanvas.h
index 643ef13..bf85c31 100644
--- a/src/Root/QCanvas.h
+++ b/src/Root/QCanvas.h
@@ -3,10 +3,11 @@
 #ifdef HAVE_QT
 #include <QWidget>
 
-class TCanvas;
-class QPaintEvent;
-class QResizeEvent;
 class QMouseEvent;
+class QPoint;
+
+class TObject;
+class TCanvas;
 
 namespace uLib {
 namespace Root {
@@ -21,6 +22,7 @@ public:
     void SetCanvas(TCanvas* c);
 
 protected:
+    void ShowContextMenu(TObject* obj, const QPoint& globalPos);
     void paintEvent(QPaintEvent* event) override;
     void resizeEvent(QResizeEvent* event) override;
     void mouseMoveEvent(QMouseEvent* event) override;
diff --git a/src/Root/testing/root_api_test.cpp b/src/Root/testing/root_api_test.cpp
new file mode 100644
index 0000000..8013b86
--- /dev/null
+++ b/src/Root/testing/root_api_test.cpp
@@ -0,0 +1,33 @@
+#include <TClass.h>
+#include <TMethod.h>
+#include <TList.h>
+#include <TH1F.h>
+#include <iostream>
+#include <TMethodCall.h>
+#include <TSystem.h>
+
+int main() {
+    TH1F *h = new TH1F("h", "h", 10, 0, 10);
+    TClass *cl = h->IsA();
+    if (!cl) {
+        std::cout << "No class found" << std::endl;
+        return 1;
+    }
+    TList *methods = cl->GetListOfMethods();
+    if (!methods) {
+        std::cout << "No methods found" << std::endl;
+        return 2;
+    }
+    TIter next(methods);
+    TObject *obj;
+    int count = 0;
+    while ((obj = next())) {
+        TMethod *method = dynamic_cast<TMethod*>(obj);
+        if (method && method->IsMenuItem()) {
+            std::cout << "Menu item: " << method->GetName() << " (" << method->GetTitle() << ")" << std::endl;
+            count++;
+            if (count > 5) break; // Just show a few
+        }
+    }
+    return 0;
+}