Cursor change to indicate module clickability (#3108)

* Indicate clickability on mouse hover

* Avoid messy overrides situation

* Update AModule.cpp

* Update AModule.cpp

* Update AModule.cpp

* Update AModule.cpp

---------

Co-authored-by: Alexis Rouillard <alexisr245@gmail.com>

include/AModule.hpp

@@ -37,6 +37,8 @@ class AModule : public IModule {
   const Json::Value &config_;
   Gtk::EventBox event_box_;
 
+  virtual void setCursor(Gdk::CursorType const c);
+
   virtual bool handleToggle(GdkEventButton *const &ev);
   virtual bool handleMouseEnter(GdkEventCrossing *const &ev);
   virtual bool handleMouseLeave(GdkEventCrossing *const &ev);
@@ -46,6 +48,7 @@ class AModule : public IModule {
  private:
   bool handleUserEvent(GdkEventButton *const &ev);
   const bool isTooltip;
+  bool hasUserEvents_;
   std::vector<int> pid_;
   gdouble distance_scrolled_y_;
   gdouble distance_scrolled_x_;

src/AModule.cpp

@@ -15,6 +15,7 @@ AModule::AModule(const Json::Value& config, const std::string& name, const std::
       distance_scrolled_x_(0.0) {
   // Configure module action Map
   const Json::Value actions{config_["actions"]};
+
   for (Json::Value::const_iterator it = actions.begin(); it != actions.end(); ++it) {
     if (it.key().isString() && it->isString())
       if (eventActionMap_.count(it.key().asString()) == 0) {
@@ -31,17 +32,20 @@ AModule::AModule(const Json::Value& config, const std::string& name, const std::
   event_box_.signal_leave_notify_event().connect(sigc::mem_fun(*this, &AModule::handleMouseLeave));
 
   // configure events' user commands
-  // hasUserEvent is true if any element from eventMap_ is satisfying the condition in the lambda
+  // hasUserEvents is true if any element from eventMap_ is satisfying the condition in the lambda
-  bool hasUserEvent =
+  bool hasUserEvents =
       std::find_if(eventMap_.cbegin(), eventMap_.cend(), [&config](const auto& eventEntry) {
         // True if there is any non-release type event
         return eventEntry.first.second != GdkEventType::GDK_BUTTON_RELEASE &&
                config[eventEntry.second].isString();
       }) != eventMap_.cend();
 
-  if (enable_click || hasUserEvent) {
+  if (enable_click || hasUserEvents) {
+    hasUserEvents_ = true;
     event_box_.add_events(Gdk::BUTTON_PRESS_MASK);
     event_box_.signal_button_press_event().connect(sigc::mem_fun(*this, &AModule::handleToggle));
+  } else {
+    hasUserEvents_ = false;
   }
 
   bool hasReleaseEvent =
@@ -86,10 +90,21 @@ auto AModule::doAction(const std::string& name) -> void {
   }
 }
 
+
+void AModule::setCursor(Gdk::CursorType c) {
+  auto cursor = Gdk::Cursor::create(Gdk::HAND2);
+  auto gdk_window = event_box_.get_window();
+  gdk_window->set_cursor(cursor);
+}
+
 bool AModule::handleMouseEnter(GdkEventCrossing* const& e) {
   if (auto* module = event_box_.get_child(); module != nullptr) {
     module->set_state_flags(Gtk::StateFlags::STATE_FLAG_PRELIGHT);
   }
+  
+  if (hasUserEvents_) {
+    setCursor(Gdk::HAND2);
+  }
   return false;
 }
 
@@ -97,6 +112,10 @@ bool AModule::handleMouseLeave(GdkEventCrossing* const& e) {
   if (auto* module = event_box_.get_child(); module != nullptr) {
     module->unset_state_flags(Gtk::StateFlags::STATE_FLAG_PRELIGHT);
   }
+  
+  if (hasUserEvents_) {
+    setCursor(Gdk::ARROW);
+  }
   return false;
 }
 
@@ -108,6 +127,7 @@ bool AModule::handleUserEvent(GdkEventButton* const& e) {
   std::string format{};
   const std::map<std::pair<uint, GdkEventType>, std::string>::const_iterator& rec{
       eventMap_.find(std::pair(e->button, e->type))};
+
   if (rec != eventMap_.cend()) {
     // First call module actions
     this->AModule::doAction(rec->second);