allow for delayed map notifications during animations

common/glfw_view.cpp

@@ -1,5 +1,7 @@
 #include "glfw_view.hpp"
 
+#include <llmr/util/time.hpp>
+
 GLFWView::GLFWView(bool fullscreen) : fullscreen(fullscreen) {
 #ifdef NVIDIA
     glDiscardFramebufferEXT = (PFNGLDISCARDFRAMEBUFFEREXTPROC)glfwGetProcAddress("glDiscardFramebufferEXT");
@@ -281,7 +283,7 @@ void show_color_debug_image(std::string name, const char *data, size_t logical_w
 }
 #endif
 
-void notify_map_change(MapChange change) {
+void notify_map_change(MapChange change, timestamp delay) {
     // no-op
 }
 

common/headless_view.cpp

@@ -1,4 +1,5 @@
 #include "headless_view.hpp"
+#include <llmr/util/time.hpp>
 #include <llmr/util/timer.hpp>
 #include <llmr/platform/platform.hpp>
 
@@ -6,7 +7,7 @@ namespace llmr {
 
 namespace platform {
 
-void notify_map_change(MapChange change) {
+void notify_map_change(MapChange change, timestamp delay) {
     // no-op
 }
 

include/llmr/platform/platform.hpp

@@ -1,6 +1,8 @@
 #ifndef LLMR_PLATFORM_PLATFORM
 #define LLMR_PLATFORM_PLATFORM
 
+#include <llmr/util/time.hpp>
+
 #include <memory>
 #include <functional>
 #include <string>
@@ -49,7 +51,7 @@ std::shared_ptr<Request> request_http(const std::string &url,
 void cancel_request_http(const std::shared_ptr<Request> &req);
 
 // Notifies a watcher of map changes.
-void notify_map_change(MapChange key);
+void notify_map_change(MapChange key, timestamp delay = 0);
 
 // Shows an alpha image with the specified dimensions in a named window.
 void show_debug_image(std::string name, const char *data, size_t width, size_t height);

src/map/transform.cpp

@@ -86,7 +86,8 @@ void Transform::_moveBy(const double dx, const double dy, const timestamp durati
 
     platform::notify_map_change(duration ?
                                 platform::MapChangeRegionDidChangeAnimated :
-                                platform::MapChangeRegionDidChange);
+                                platform::MapChangeRegionDidChange,
+                                duration);
 }
 
 void Transform::setLonLat(const double lon, const double lat, const timestamp duration) {
@@ -310,7 +311,8 @@ void Transform::_setScaleXY(const double new_scale, const double xn, const doubl
 
     platform::notify_map_change(duration ?
                                 platform::MapChangeRegionDidChangeAnimated :
-                                platform::MapChangeRegionDidChange);
+                                platform::MapChangeRegionDidChange,
+                                duration);
 }
 
 #pragma mark - Constraints
@@ -410,7 +412,8 @@ void Transform::_setAngle(double new_angle, const timestamp duration) {
 
     platform::notify_map_change(duration ?
                                 platform::MapChangeRegionDidChangeAnimated :
-                                platform::MapChangeRegionDidChange);
+                                platform::MapChangeRegionDidChange,
+                                duration);
 }
 
 double Transform::getAngle() const {