Reused the old unused PROPERTY_HINT_SPRITE_FRAMES as PROPERTY_HINT_BUTTON. It allows you to add buttons to the inspectors.

core/global_constants.cpp

@@ -587,6 +587,7 @@ void register_global_constants() {
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_ENUM_SUGGESTION);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_EXP_EASING);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_LENGTH);
+	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_BUTTON);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_KEY_ACCEL);
 	BIND_GLOBAL_ENUM_CONSTANT(PROPERTY_HINT_FLAGS);
 

core/object.h

@@ -61,7 +61,7 @@ enum PropertyHint {
 	PROPERTY_HINT_ENUM, ///< hint_text= "val1,val2,val3,etc"
 	PROPERTY_HINT_EXP_EASING, /// exponential easing function (Math::ease) use "attenuation" hint string to revert (flip h), "full" to also include in/out. (ie: "attenuation,inout")
 	PROPERTY_HINT_LENGTH, ///< hint_text= "length" (as integer)
-	PROPERTY_HINT_SPRITE_FRAME, // FIXME: Obsolete: drop whenever we can break compat. Keeping now for GDNative compat.
+	PROPERTY_HINT_BUTTON, // Use a button in the inspector for this property. The property's type has to be Variant::NIL. hint_text="call_func:name/theme_type" -> calls call_func on press, optional: ":name/theme_type" -> get_icon("name", "theme_type")
 	PROPERTY_HINT_KEY_ACCEL, ///< hint_text= "length" (as integer)
 	PROPERTY_HINT_FLAGS, ///< hint_text= "flag1,flag2,etc" (as bit flags)
 	PROPERTY_HINT_LAYERS_2D_RENDER,

doc/classes/@GlobalScope.xml

@@ -1438,6 +1438,9 @@
 		<constant name="PROPERTY_HINT_LENGTH" value="5" enum="PropertyHint">
 			Deprecated hint, unused.
 		</constant>
+		<constant name="PROPERTY_HINT_BUTTON" value="6" enum="PropertyHint">
+			Use a button in the inspector for this property. The property's type has to be Variant::NIL. The hint string has to contain a method that you want called. [code]"my_method"[/code] will call [code]my_method()[/code] on press. Optionally it can also contain a theme icon like: [code]"my_method:name/theme_type"[/code] -> [code]get_icon("name", "theme_type")[/code]
+		</constant>
 		<constant name="PROPERTY_HINT_KEY_ACCEL" value="7" enum="PropertyHint">
 			Deprecated hint, unused.
 		</constant>

editor/editor_properties.cpp

@@ -44,6 +44,7 @@
 #include "core/math/transform.h"
 #include "core/math/transform_2d.h"
 #include "core/math/vector3.h"
+#include "core/object.h"
 #include "core/object_id.h"
 #include "core/os/input_event.h"
 #include "core/os/memory.h"
@@ -642,6 +643,52 @@ EditorPropertyCheck::EditorPropertyCheck() {
 	checkbox->connect("pressed", this, "_checkbox_pressed");
 }
 
+///////////////////// Button /////////////////////////
+void EditorPropertyButton::update_property() {
+	_button->set_disabled(is_read_only());
+}
+
+void EditorPropertyButton::setup(const String &method_name, const Vector<String> &p_options) {
+	_method_name = method_name;
+
+	if (p_options.size() >= 2) {
+		_icon_name = p_options[0];
+		_icon_theme_type = p_options[1];
+	}
+}
+
+EditorPropertyButton::EditorPropertyButton() {
+	_button = memnew(Button);
+	_button->set_text(TTR("Run"));
+	add_child(_button);
+	add_focusable(_button);
+	_button->connect("pressed", this, "_button_pressed");
+}
+
+void EditorPropertyButton::_notification(int p_what) {
+	switch (p_what) {
+		case NOTIFICATION_THEME_CHANGED:
+		case NOTIFICATION_ENTER_TREE: {
+			if (_icon_name != "") {
+				_button->set_icon(get_icon(_icon_name, _icon_theme_type));
+			}
+		} break;
+	}
+}
+
+void EditorPropertyButton::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("_button_pressed"), &EditorPropertyButton::_button_pressed);
+}
+
+void EditorPropertyButton::_button_pressed() {
+	//emit_changed(get_edited_property(), _button->is_pressed());
+	//get_edited_object()->get(get_edited_property());
+
+	if (_method_name != "") {
+		get_edited_object()->call(_method_name);
+	}
+}
+
 ///////////////////// ENUM /////////////////////////
 
 void EditorPropertyEnum::_option_selected(int p_which) {
@@ -3034,8 +3081,26 @@ bool EditorInspectorDefaultPlugin::parse_property(Object *p_object, Variant::Typ
 	switch (p_type) {
 		// atomic types
 		case Variant::NIL: {
-			EditorPropertyNil *editor = memnew(EditorPropertyNil);
-			add_property_editor(p_path, editor);
+			if (p_hint == PROPERTY_HINT_BUTTON) {
+				EditorPropertyButton *editor = memnew(EditorPropertyButton);
+
+				Vector<String> nopts = p_hint_text.split(":");
+
+				if (nopts.size() > 0) {
+					Vector<String> icon_opts;
+
+					if (nopts.size() >= 2) {
+						icon_opts = nopts[1].split("/");
+					}
+
+					editor->setup(nopts[0], icon_opts);
+				}
+
+				add_property_editor(p_path, editor);
+			} else {
+				EditorPropertyNil *editor = memnew(EditorPropertyNil);
+				add_property_editor(p_path, editor);
+			}
 		} break;
 		case Variant::BOOL: {
 			EditorPropertyCheck *editor = memnew(EditorPropertyCheck);

editor/editor_properties.h

@@ -241,6 +241,29 @@ public:
 	EditorPropertyCheck();
 };
 
+class EditorPropertyButton : public EditorProperty {
+	GDCLASS(EditorPropertyButton, EditorProperty);
+
+public:
+	virtual void update_property();
+
+	void setup(const String &method_name, const Vector<String> &p_options);
+
+	EditorPropertyButton();
+
+protected:
+	void _notification(int p_what);
+	static void _bind_methods();
+
+	void _button_pressed();
+
+	String _method_name;
+	String _icon_name;
+	String _icon_theme_type;
+
+	Button *_button;
+};
+
 class EditorPropertyEnum : public EditorProperty {
 	GDCLASS(EditorPropertyEnum, EditorProperty);
 	OptionButton *options;

modules/web/http/csrf_token.cpp

@@ -1,6 +1,7 @@
 #include "csrf_token.h"
 
 #include "core/crypto/crypto_core.h"
+#include "core/object.h"
 #include "core/os/os.h"
 #include "http_server_enums.h"
 #include "http_session.h"