Nicer structure

Makefile

@@ -13,7 +13,8 @@ GTK_LIBS   := $(shell $(PKG_CONFIG) --libs gtk4)
 PACKAGE := gkeymapper
 TARGET   := gkeymapper
 SRC_DIR  := src
-SOURCES  := $(SRC_DIR)/main.cpp
+SOURCES  := $(wildcard $(SRC_DIR)/*.cpp)
+HEADERS  := $(wildcard $(SRC_DIR)/*.h)
 PREFIX   ?= /usr/local
 LOCALEDIR := $(PREFIX)/share/locale
 ASSETS_DIR := $(PREFIX)/share/$(PACKAGE)/assets
@@ -29,7 +30,7 @@ MO_FILES := $(patsubst %,locale/%/LC_MESSAGES/$(PACKAGE).mo,$(LANGS))
 
 all: $(TARGET) translations
 
-$(TARGET): $(SOURCES)
+$(TARGET): $(SOURCES) $(HEADERS)
 	$(CXX) $(CXXFLAGS) $(GTK_CFLAGS) -o $@ $(SOURCES) $(GTK_LIBS)
 
 translations: $(MO_FILES)