Add version() to each plugin

And display it in the screensaver tool with the -l option.

modules/Default/Default.cpp

@@ -10,12 +10,17 @@ class Default : public ScreensaverPlugin {
         int fps() const override;
         void update() override;
         void render() override;
+        std::string version() const override;
 };
 
 ScreensaverPlugin* create_instance() {
     return new Default;
 }
 
+std::string Default::version() const {
+    return "1.0.0";
+}
+
 int Default::fps() const {
     return 2;
 }

modules/FadingRects/FadingRects.cpp

@@ -40,6 +40,7 @@ class FadingRects : public ScreensaverPlugin {
         int fps() const override;
         void update () override;
         void render() override;
+        std::string version() const override;
 
     private:
         double _hue {0.0};
@@ -53,6 +54,10 @@ ScreensaverPlugin* create_instance() {
     return new FadingRects;
 }
 
+std::string FadingRects::version() const {
+    return "1.1.0";
+}
+
 int FadingRects::fps() const {
     return 20;
 }

modules/Grid/Grid.cpp

@@ -35,6 +35,7 @@ class Grid : public ScreensaverPlugin {
         int fps() const override;
         void update() override;
         void render() override;
+        std::string version() const override;
 
     private:
         size_t _h;
@@ -109,6 +110,10 @@ void Grid::configure() {
     setup(_c, _r);
 }
 
+std::string Grid::version() const {
+    return "1.0.0";
+}
+
 int Grid::fps() const {
     return 30;
 }

modules/Huey/Huey.cpp

@@ -12,6 +12,7 @@ class Huey : public ScreensaverPlugin {
         int fps() const override;
         void update() override;
         void render() override;
+        std::string version() const override;
 
     private:
         double _hue {0};
@@ -21,6 +22,10 @@ ScreensaverPlugin* create_instance() {
     return new Huey;
 }
 
+std::string Huey::version() const {
+    return "1.1.0";
+}
+
 int Huey::fps() const {
     return 50;
 }

modules/Whirling/Whirling.cpp

@@ -35,6 +35,7 @@ class Whirling : public ScreensaverPlugin {
         void update() override;
         void render() override;
         void configure() override;
+        std::string version() const override;
 
     private:
         std::vector<Lissajous> knots;
@@ -46,6 +47,10 @@ ScreensaverPlugin* create_instance() {
     return new Whirling;
 }
 
+std::string Whirling::version() const {
+    return "1.0.0";
+}
+
 int Whirling::fps() const {
     return 30;
 }

src/main.cpp

@@ -41,8 +41,9 @@ void print_help() {
 }
 
 void list_plugins() {
-    for (const std::string& name : sc::plugin<ScreensaverPlugin>::names()) {
+    for (const auto& elem : sc::plugin<ScreensaverPlugin>::all()) {
-        std::cout << name << '\n';
+
+        std::cout << elem.first << " (" << elem.second()->version() << ")\n";
     }
 }