tweak event handlers

framework/include/framework.h

@@ -16,6 +16,8 @@ private:
 
     static void onSize(GLFWwindow *window, int width, int height);
 
+    static void onCursorPos(GLFWwindow *window, double x, double y);
+
 protected:
     App(int gl_major, int gl_minor);
 
@@ -33,16 +35,18 @@ protected:
 
     void setSize(int width, int height);
 
+    void swapBuffers();
+
     virtual void onKey(int key, int scan_code, int action, int mods) {}
 
     virtual void onSize(int width, int height) {}
 
+    virtual void onCursorPos(double x, double y) {}
+
     virtual void init() {}
 
     virtual void display() {}
 
-    void swapBuffers();
-
 public:
     GLFWwindow *getWindow();
 

framework/src/framework.cpp

@@ -102,18 +102,26 @@ void App::close() {
 
 std::unordered_map<GLFWwindow *, App *> manager;
 
-void App::onKey(GLFWwindow *window, int key, int scan_code, int action, int mods) {
+App *get(GLFWwindow *window) {
     auto m = manager.find(window);
+    if (m == manager.end())
+        return nullptr;
+    return m->second;
+}
 
-    if (m != manager.end())
+void App::onKey(GLFWwindow *window, int key, int scan_code, int action, int mods) {
-        m->second->onKey(key, scan_code, action, mods);
+    auto *app = get(window);
+    if (app) app->onKey(key, scan_code, action, mods);
 }
 
 void App::onSize(GLFWwindow *window, int width, int height) {
-    auto m = manager.find(window);
+    auto *app = get(window);
+    if (app) app->onSize(width, height);
+}
 
-    if (m != manager.end())
+void App::onCursorPos(GLFWwindow *window, double x, double y) {
-        m->second->onSize(width, height);
+    auto *app = get(window);
+    if (app) app->onCursorPos(x, y);
 }
 
 int App::run() {
@@ -128,6 +136,7 @@ int App::run() {
 
     glfwSetWindowSizeCallback(getWindow(), App::onSize);
     glfwSetKeyCallback(getWindow(), App::onKey);
+    glfwSetCursorPosCallback(getWindow(), App::onCursorPos);
 
     glfwMakeContextCurrent(_window);
     gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);