From 11f4cd4451ed7f4da53598aa0f0b4ae6f4f841a4 Mon Sep 17 00:00:00 2001
From: djairoh <djairoh@mykolab.com>
Date: Sun, 5 May 2024 21:54:52 +0200
Subject: [PATCH 1/2] feat: implemented pause functionality on space press

---
 vtk/src/Program.cpp                       |  1 +
 vtk/src/commands/TimerCallbackCommand.cpp | 14 +++++++++++++-
 vtk/src/commands/TimerCallbackCommand.h   |  2 ++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/vtk/src/Program.cpp b/vtk/src/Program.cpp
index f5d1a93..bcb3e61 100644
--- a/vtk/src/Program.cpp
+++ b/vtk/src/Program.cpp
@@ -37,6 +37,7 @@ void Program::setupTimer() {
   auto callback = vtkSmartPointer<TimerCallbackCommand>::New(this);
   callback->SetClientData(this);
   this->interact->AddObserver(vtkCommand::TimerEvent, callback);
+  this->interact->AddObserver(vtkCommand::KeyPressEvent, callback);
   this->interact->CreateRepeatingTimer(17); // 60 fps == 1000 / 60 == 16.7 ms per frame
 }
 
diff --git a/vtk/src/commands/TimerCallbackCommand.cpp b/vtk/src/commands/TimerCallbackCommand.cpp
index 94e9de9..8e91b58 100644
--- a/vtk/src/commands/TimerCallbackCommand.cpp
+++ b/vtk/src/commands/TimerCallbackCommand.cpp
@@ -7,10 +7,16 @@ TimerCallbackCommand::TimerCallbackCommand() : dt(3600), maxTime(3600*24*365), t
 TimerCallbackCommand* TimerCallbackCommand::New(Program *program) {
   TimerCallbackCommand *cb = new TimerCallbackCommand();
   cb->setProgram(program);
+  cb->setPaused(false);
   return cb;
 }
 
 void TimerCallbackCommand::Execute(vtkObject* caller, unsigned long eventId, void* vtkNotUsed(callData)) {
+  auto intr = reinterpret_cast<vtkRenderWindowInteractor *>(caller);
+  
+  if (eventId == vtkCommand::KeyPressEvent and not strcmp("space", intr->GetKeySym())) {
+    this->paused = ! this->paused;
+  } else if (eventId == vtkCommand::TimerEvent and not this->paused) {
   this->time += this->dt;
 
   if (this->time >= this->maxTime) {
@@ -19,10 +25,16 @@ void TimerCallbackCommand::Execute(vtkObject* caller, unsigned long eventId, voi
   }
 
   this->program->updateData(this->time);
-}
+  }
 
+}
 
 
 void TimerCallbackCommand::setProgram(Program *program) {
   this->program = program;
 }
+
+
+void TimerCallbackCommand::setPaused(const bool val) {
+  this->paused = val;
+}
diff --git a/vtk/src/commands/TimerCallbackCommand.h b/vtk/src/commands/TimerCallbackCommand.h
index 618c7bf..2ff65ea 100644
--- a/vtk/src/commands/TimerCallbackCommand.h
+++ b/vtk/src/commands/TimerCallbackCommand.h
@@ -11,11 +11,13 @@ public:
   void Execute(vtkObject* caller, unsigned long eventId, void* vtkNotUsed(callData)) override;
 
   void setProgram(Program *program);
+  void setPaused(const bool val);
 
 private:
   int time;
   int dt;
   int maxTime;
+  bool paused;
   Program *program;
 };
 

From ee9b71fb1732c5715fc94d781e24d435f85a0666 Mon Sep 17 00:00:00 2001
From: djairoh <djairoh@mykolab.com>
Date: Sun, 5 May 2024 21:56:06 +0200
Subject: [PATCH 2/2] fix: update renderWindow when drawing new points while
 the timer is paused

---
 vtk/src/commands/SpawnPointCallback.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/vtk/src/commands/SpawnPointCallback.cpp b/vtk/src/commands/SpawnPointCallback.cpp
index e29d190..a0f38cd 100644
--- a/vtk/src/commands/SpawnPointCallback.cpp
+++ b/vtk/src/commands/SpawnPointCallback.cpp
@@ -50,8 +50,7 @@ void SpawnPointCallback::Execute(vtkObject *caller, unsigned long evId, void *ca
     vtkSmartPointer<vtkCellArray> vertices = vtkSmartPointer<vtkCellArray>::New();
     vertices->InsertNextCell(vertex);
     data->SetVerts(vertices);
-//    data->Modified(); // These might be needed im not sure.
-//    ren->GetRenderWindow()->Render();
+    ren->GetRenderWindow()->Render();
 }