add clear function for callbacks

Author: nmwsharp

src/cpp/core.cpp

@@ -9,6 +9,7 @@
 #include "polyscope/affine_remapper.h"
 #include "polyscope/camera_parameters.h"
 #include "polyscope/curve_network.h"
+#include "polyscope/imgui_config.h"
 #include "polyscope/messages.h"
 #include "polyscope/pick.h"
 #include "polyscope/point_cloud.h"
@@ -144,7 +145,9 @@ PYBIND11_MODULE(polyscope_bindings, m) {
   m.def("set_warn_for_invalid_values", [](bool x) { ps::options::warnForInvalidValues = x; });
   m.def("set_display_message_popups", [](bool x) { ps::options::displayMessagePopups = x; });
   m.def("set_configure_imgui_style_callback", [](std::function<void()> x) { ps::options::configureImGuiStyleCallback = x; });
+  m.def("clear_configure_imgui_style_callback", []() {ps::options::configureImGuiStyleCallback = polyscope::configureImGuiStyle;});
   m.def("set_files_dropped_callback", [](std::function<void(const std::vector<std::string>&)> x) { ps::options::filesDroppedCallback = x; });
+  m.def("clear_files_dropped_callback", []() {ps::options::filesDroppedCallback = nullptr;});
 
 
   // === Scene extents

src/polyscope/core.py

@@ -183,9 +183,15 @@ def set_display_message_popups(b):
 def set_configure_imgui_style_callback(f):
     return psb.set_configure_imgui_style_callback(f)
 
+def clear_configure_imgui_style_callback():
+    return psb.clear_configure_imgui_style_callback()
+
 def set_files_dropped_callback(f):
     return psb.set_files_dropped_callback(f)
 
+def clear_files_dropped_callback():
+    return psb.clear_files_dropped_callback()
+
 def set_navigation_style(s):
     psb.set_navigation_style(str_to_navigate_style(s))
 def get_navigation_style():