Receive events from each key pressed in field and textarea (by @kilbith)

doc/lua_api.txt

@@ -1914,6 +1914,7 @@ examples.
 * Fields are a set height, but will be vertically centred on `h`
 * Position and size units are inventory slots
 * `name` is the name of the field as returned in fields to `on_receive_fields`
+* `!name` to receive an event from each key pressed
 * `label`, if not blank, will be text printed on the top left above the field
 * `default` is the default value of the field
     * `default` may contain variable references such as `${text}'` which

games/default/files/creative/inventory.lua

@@ -263,9 +263,14 @@ local function get_creative_formspec(player_name, start_i, pagenum, page, pagema
 	if page == "all" then
 		local inv = player_inventory[player_name] or {}
 		local filter = inv.filter or ""
-		formspec = formspec .. "field_close_on_enter[search;false]"..
-			"field[5.31,1.27;4.0,0.75;search;;"..filter.."]"..
-			"image_button[9.14,0.93;0.81,0.82;creative_search.png;creative_search;;;false]"
+		if minetest.is_singleplayer() then
+			formspec = formspec .. "field_close_on_enter[search;false]"..
+				"field[5.31,1.27;4.0,0.75;!search;;"..filter.."]"
+		else
+			formspec = formspec .. "field_close_on_enter[search;false]"..
+				"field[5.31,1.27;4.0,0.75;search;;"..filter.."]"..
+				"image_button[9.14,0.93;0.81,0.82;creative_search.png;creative_search;;;false]"
+		end
 	end
 	if pagenum ~= nil then
 		formspec = formspec .. "p"..tostring(pagenum)

games/default/files/signs/init.lua

@@ -156,7 +156,11 @@ minetest.register_node("signs:sign", {
 	end,
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
-		meta:set_string("formspec", "field[text;;${sign_text}]")
+		if minetest.is_singleplayer() then
+			meta:set_string("formspec", "field[!text;Enter your text:;${sign_text}]")
+		else
+			meta:set_string("formspec", "field[text;Enter your text:;${sign_text}]")
+		end
 	end,
 	on_destruct = function(pos)
 		for _, obj in pairs(minetest.get_objects_inside_radius(pos, 0.5)) do
@@ -219,7 +223,11 @@ minetest.register_node("signs:wall_sign", {
 	drop = "signs:sign",
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
-		meta:set_string("formspec", "field[text;;${sign_text}]")
+		if minetest.is_singleplayer() then
+			meta:set_string("formspec", "field[!text;Enter your text:;${sign_text}]")
+		else
+			meta:set_string("formspec", "field[text;Enter your text:;${sign_text}]")
+		end
 	end,
 	on_destruct = function(pos)
 		for _, obj in pairs(minetest.get_objects_inside_radius(pos, 0.5)) do

src/guiFormSpecMenu.cpp

@@ -1006,6 +1006,10 @@ void GUIFormSpecMenu::parseSimpleField(parserData* data,
 	std::string label = parts[1];
 	std::string default_val = parts[2];
 
+	bool is_dynamic = (name.length() > 0 && name[0] == '!');
+	if (is_dynamic)
+		name = name.substr(1);
+
 	core::rect<s32> rect;
 
 	if(data->explicit_size)
@@ -1032,6 +1036,8 @@ void GUIFormSpecMenu::parseSimpleField(parserData* data,
 		258+m_fields.size()
 	);
 
+	spec.is_dynamic = is_dynamic;
+
 	if (name == "")
 	{
 		// spec field id to 0, this stops submit searching for a value that isn't there
@@ -1094,6 +1100,10 @@ void GUIFormSpecMenu::parseTextArea(parserData* data, std::vector<std::string>&
 	std::string label = parts[3];
 	std::string default_val = parts[4];
 
+	bool is_dynamic = (name.length() > 0 && name[0] == '!');
+	if (is_dynamic)
+		name = name.substr(1);
+
 	MY_CHECKPOS(type,0);
 	MY_CHECKGEOM(type,1);
 
@@ -1135,6 +1145,8 @@ void GUIFormSpecMenu::parseTextArea(parserData* data, std::vector<std::string>&
 		258+m_fields.size()
 	);
 
+	spec.is_dynamic = is_dynamic;
+
 	if (name == "")
 	{
 		// spec field id to 0, this stops submit searching for a value that isn't there
@@ -3817,6 +3829,20 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
 				}
 			}
 		}
+		
+	if (event.GUIEvent.EventType == gui::EGET_EDITBOX_CHANGED) {
+		if (event.GUIEvent.Caller->getID() > 257) {
+			for (GUIFormSpecMenu::FieldSpec &s : m_fields) {
+					if (s.ftype == f_Unknown && s.is_dynamic &&
+							s.fid == event.GUIEvent.Caller->getID()) {
+						s.send = true;
+						acceptInput();
+						s.send = false;
+					}
+				}
+				return true;
+			}
+		}
 
 		if (event.GUIEvent.EventType == gui::EGET_EDITBOX_ENTER) {
 			if (event.GUIEvent.Caller->getID() > 257) {

src/guiFormSpecMenu.h

@@ -214,7 +214,8 @@ class GUIFormSpecMenu : public GUIModalMenu
 			fid(id),
 			send(false),
 			ftype(f_Unknown),
-			is_exit(false)
+			is_exit(false),
+			is_dynamic(false)
 		{
 		}
 
@@ -225,6 +226,7 @@ class GUIFormSpecMenu : public GUIModalMenu
 		bool send;
 		FormspecFieldType ftype;
 		bool is_exit;
+		bool is_dynamic;
 		core::rect<s32> rect;
 	};