Add close button to windows without one

src/imgui_helper.hpp

@@ -27,10 +27,13 @@ namespace Tri {
             ImGui::Text("Click anywhere to create triangles, one point at a time");
             ImGui::Text("You cannot draw when a window is open");
             ImGui::Text("Press \"U\" to undo. Clicking will remove all future undo history");
-            ImGui::Text("Press \"R\" to undo.");
+            ImGui::Text("Press \"R\" to redo.");
             ImGui::Text("Press \"C\" to change colors");
             ImGui::Text("Press \"B\" to change background color");
             ImGui::Text("Press \"S\" to save what was drawn as a png image");
+            if(ImGui::Button("Close")) {
+                state->close_help();
+            }
             ImGui::End();
         }
     }
@@ -59,6 +62,9 @@ namespace Tri {
         if(state->get_flags().test(2)) {
             ImGui::Begin("Tri Color Picker");
             ImGui::ColorPicker4("Tri Color", state->get_color());
+            if(ImGui::Button("Close")) {
+                state->close_color_picker();
+            }
             ImGui::End();
         }
     }
@@ -67,6 +73,9 @@ namespace Tri {
         if(state->get_flags().test(5)) {
             ImGui::Begin("BG Color Picker");
             ImGui::ColorPicker3("BG Color", state->get_bg_color());
+            if(ImGui::Button("Close")) {
+                state->close_bg_color_picker();
+            }
             ImGui::End();
         }
     }

src/state.cpp

@@ -114,14 +114,16 @@ void Tri::State::handle_events() {
                         }
                     }
                 } else if(event.key.code == sf::Keyboard::C) {
-                    flags.flip(2);
-                    if(!flags.test(2)) {
-                        flags.set(7);
+                    if(flags.test(2)) {
+                        close_color_picker();
+                    } else {
+                        flags.set(2);
                     }
                 } else if(event.key.code == sf::Keyboard::B) {
-                    flags.flip(5);
-                    if(!flags.test(5)) {
-                        flags.set(7);
+                    if(flags.test(5)) {
+                        close_bg_color_picker();
+                    } else {
+                        flags.set(5);
                     }
                 } else if(event.key.code == sf::Keyboard::S) {
                     flags.flip(6);
@@ -308,3 +310,17 @@ void Tri::State::close_save() {
 bool Tri::State::is_in_clickable_menu() const {
     return flags.test(0) || flags.test(2) || flags.test(5) || flags.test(6);
 }
+
+void Tri::State::close_help() {
+    flags.reset(0);
+}
+
+void Tri::State::close_color_picker() {
+    flags.reset(2);
+    flags.set(7);
+}
+
+void Tri::State::close_bg_color_picker() {
+    flags.reset(5);
+    flags.set(7);
+}

src/state.hpp

@@ -81,6 +81,12 @@ namespace Tri {
 
     private:
         bool is_in_clickable_menu() const;
+
+    public:
+        void close_help();
+        void close_color_picker();
+        void close_bg_color_picker();
+
     };
 }