From fa2e087a8fdbc0c676858308d2435667d87d22c0 Mon Sep 17 00:00:00 2001
From: Rodolfo Ribeiro Gomes <rodolforg@gmail.com>
Date: Oct 10 2019 07:28:12 +0000
Subject: WorkspaceHandler emits signal for list changing


---

diff --git a/synfig-studio/src/gui/app.cpp b/synfig-studio/src/gui/app.cpp
index 257b28c..cf1556b 100644
--- a/synfig-studio/src/gui/app.cpp
+++ b/synfig-studio/src/gui/app.cpp
@@ -1703,6 +1703,7 @@ App::App(const synfig::String& basepath, int *argc, char ***argv):
 
 		studio_init_cb.task(_("Loading Custom Workspace List..."));
 		workspaces = new WorkspaceHandler();
+		workspaces->signal_list_changed().connect( sigc::mem_fun(signal_custom_workspaces_changed_, &sigc::signal<void>::emit) );
 		load_custom_workspaces();
 
 		studio_init_cb.task(_("Init auto recovery..."));
@@ -2271,7 +2272,6 @@ void App::load_custom_workspaces()
 	workspaces->clear();
 	std::string filename = get_config_file("workspaces");
 	workspaces->load(filename);
-	signal_custom_workspaces_changed_();
 }
 
 static void trim_string(std::string &text)
@@ -2330,7 +2330,6 @@ void App::save_custom_workspace()
 			return;
 		workspaces->set_workspace(name, tpl);
 	}
-	signal_custom_workspaces_changed_();
 }
 
 void
diff --git a/synfig-studio/src/gui/workspacehandler.cpp b/synfig-studio/src/gui/workspacehandler.cpp
index 6808ea5..586dc0c 100644
--- a/synfig-studio/src/gui/workspacehandler.cpp
+++ b/synfig-studio/src/gui/workspacehandler.cpp
@@ -78,16 +78,24 @@ WorkspaceHandler::add_workspace(const std::string& name, const std::string& tpl)
 	if (has_workspace(valid_name))
 		return false;
 	workspaces[valid_name] = tpl;
+	signal_list_changed_.emit();
 	return true;
 }
 
 void
 WorkspaceHandler::remove_workspace(const std::string& name)
 {
-	workspaces.erase(name);
+	size_t count = workspaces.erase(name);
+	if (count > 0)
+		signal_list_changed_.emit();
+}
+
 void WorkspaceHandler::clear()
 {
+	size_t previous_size = workspaces.size();
 	workspaces.clear();
+	if (previous_size > 0)
+		signal_list_changed_.emit();
 }
 
 bool
@@ -140,6 +148,7 @@ WorkspaceHandler::load(const std::string& filename)
 {
 	std::ifstream ifs(filename);
 	std::string line;
+	int count = 0;
 	while (ifs && !ifs.eof()) {
 		getline(ifs, line);
 		if (line.empty())
@@ -159,5 +168,13 @@ WorkspaceHandler::load(const std::string& filename)
 
 		std::string tpl = line.substr(pos+1);
 		workspaces[name] = tpl;
+		count++;
 	}
+	if (count > 0)
+		signal_list_changed_.emit();
+}
+
+sigc::signal<void>& WorkspaceHandler::signal_list_changed()
+{
+	return signal_list_changed_;
 }
diff --git a/synfig-studio/src/gui/workspacehandler.h b/synfig-studio/src/gui/workspacehandler.h
index 7ddca3d..8867991 100644
--- a/synfig-studio/src/gui/workspacehandler.h
+++ b/synfig-studio/src/gui/workspacehandler.h
@@ -28,6 +28,7 @@
 #include <string>
 #include <map>
 #include <vector>
+#include <sigc++/signal.h>
 
 namespace studio {
 
@@ -59,9 +60,12 @@ public:
 	/// stores custom workspace layouts in a config file
 	bool save(const std::string& filename);
 
+	sigc::signal<void> & signal_list_changed();
+
 private:
 	std::map<std::string, std::string> workspaces;
 
+	sigc::signal<void> signal_list_changed_;
 };
 
 }