add keyboard shortcuts for resetting position

include/llmr/map/map.hpp

@@ -26,6 +26,14 @@ public:
     void tileLoaded(tile::ptr tile);
     void tileFailed(tile::ptr tile);
 
+    /* position */
+    void resetNorth();
+    void resetPosition();
+    // void setAngle(double angle);
+    // void setLonLat(double lon, double lat);
+    // void setZoom(double zoom);
+    // void setLonLatZoom(double lon, double lat, double zoom);
+
 private:
     bool findLoadedChildren(const tile_id& id, int32_t maxCoveringZoom, std::forward_list<tile_id>& retain);
     bool findLoadedParent(const tile_id& id, int32_t minCoveringZoom, std::forward_list<tile_id>& retain);

macosx/main.mm

@@ -49,10 +49,40 @@ public:
         glfwSetMouseButtonCallback(window, mouseclick);
         glfwSetWindowSizeCallback(window, resize);
         glfwSetScrollCallback(window, scroll);
+        glfwSetCharCallback(window, character);
+        glfwSetKeyCallback(window, key);
 
         glfwSetWindowUserPointer(window, this);
     }
 
+    static void character(GLFWwindow *window, unsigned int codepoint) {
+        MapView *view = (MapView *)glfwGetWindowUserPointer(window);
+        switch (codepoint) {
+            case L'n':
+            case L'N':
+                view->map->resetNorth();
+                break;
+            case L'r':
+            case L'R':
+                view->map->resetPosition();
+                break;
+        }
+    }
+
+
+    static void key(GLFWwindow *window, int key, int scancode, int action, int mods) {
+        // MapView *view = (MapView *)glfwGetWindowUserPointer(window);
+
+        if (action == GLFW_RELEASE) {
+            switch (key) {
+                case GLFW_KEY_ESCAPE:
+                    glfwSetWindowShouldClose(window, true);
+                    break;
+            }
+        }
+    }
+
+
     static void scroll(GLFWwindow *window, double xoffset, double yoffset) {
         MapView *view = (MapView *)glfwGetWindowUserPointer(window);
         double delta = yoffset * 40;

src/map/map.cpp

@@ -53,6 +53,19 @@ void map::rotateBy(double cx, double cy, double sx, double sy, double ex, double
     platform::restart(this);
 }
 
+void map::resetNorth() {
+    transform->setAngle(0);
+    updateTiles();
+    platform::restart(this);
+}
+
+void map::resetPosition() {
+    transform->setAngle(0);
+    transform->setLonLat(0, 0);
+    transform->setZoom(0);
+    updateTiles();
+    platform::restart(this);
+}
 
 tile::ptr map::hasTile(const tile_id& id) {
     for (tile::ptr& tile : tiles) {