make it usable as a meson submodule

api/basic_widgets/button.hpp

@@ -5,7 +5,7 @@
 
 #include <SDL2/SDL_ttf.h>
 
-#include "caption.hpp"
+#include <basic_widgets/caption.hpp>
 
 class Button : public Widget
 {

api/basic_widgets/caption.hpp

@@ -3,9 +3,9 @@
 
 #include <string>
 
-#include "SDL2/SDL_ttf.h"
+#include <SDL2/SDL_ttf.h>
 
-#include "widget.hpp"
+#include <basic_widgets/widget.hpp>
 
 class Caption : public Widget
 {

api/basic_widgets/horizontal_layout.hpp

@@ -1,7 +1,7 @@
 #ifndef HORIZONTAL_LAYOUT_HPP
 #define HORIZONTAL_LAYOUT_HPP
 
-#include "layout.hpp"
+#include <basic_widgets/layout.hpp>
 
 class Horizontal_Layout : public Layout
 {

api/basic_widgets/input.hpp

@@ -7,8 +7,7 @@
 #include <string>
 #include <type_traits>
 
-#include "caption.hpp"
-#include "widget.hpp"
+#include <basic_widgets/caption.hpp>
 
 template<typename T>
 concept CanToString = requires(T value) { std::to_string(value); };

api/basic_widgets/layout.hpp

@@ -3,7 +3,7 @@
 
 #include <vector>
 
-#include "widget.hpp"
+#include <basic_widgets/widget.hpp>
 
 class Layout : public Widget
 {

api/basic_widgets/numeric_input.hpp

@@ -5,8 +5,8 @@
 #include <regex>
 #include <type_traits>
 
-#include "button.hpp"
-#include "input.hpp"
+#include <basic_widgets/button.hpp>
+#include <basic_widgets/input.hpp>
 
 template<typename T>
 concept Numeric = std::is_arithmetic_v<T>;

api/basic_widgets/vertical_layout.hpp

@@ -1,7 +1,7 @@
 #ifndef VERTICAL_LAYOUT_HPP
 #define VERTICAL_LAYOUT_HPP
 
-#include "layout.hpp"
+#include <basic_widgets/layout.hpp>
 
 class Vertical_Layout : public Layout
 {

button.cpp

@@ -1,4 +1,4 @@
-#include "button.hpp"
+#include <basic_widgets/button.hpp>
 
 Button::Button(SDL_Renderer* r)
     : Widget(r), _caption(r)

caption.cpp

@@ -1,4 +1,4 @@
-#include "caption.hpp"
+#include <basic_widgets/caption.hpp>
 
 Caption::Caption(SDL_Renderer* r)
     : Widget(r)

examples/button_example.cpp

@@ -1,8 +1,8 @@
 #include <iostream>
 
-#include "button.hpp"
-#include "horizontal_layout.hpp"
-#include "vertical_layout.hpp"
+#include <basic_widgets/button.hpp>
+#include <basic_widgets/horizontal_layout.hpp>
+#include <basic_widgets/vertical_layout.hpp>
 
 int main()
 {

examples/input_example.cpp

@@ -1,8 +1,8 @@
 #include <iostream>
 
-#include "horizontal_layout.hpp"
-#include "numeric_input.hpp"
-#include "vertical_layout.hpp"
+#include <basic_widgets/horizontal_layout.hpp>
+#include <basic_widgets/numeric_input.hpp>
+#include <basic_widgets/vertical_layout.hpp>
 
 int main()
 {

horizontal_layout.cpp

@@ -1,6 +1,6 @@
 #include "iostream"
 
-#include "horizontal_layout.hpp"
+#include <basic_widgets/horizontal_layout.hpp>
 
 Horizontal_Layout::Horizontal_Layout(SDL_Renderer* r)
     : Layout::Layout(r)

layout.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 
-#include "layout.hpp"
+#include <basic_widgets/layout.hpp>
 
 Layout::Layout(SDL_Renderer* r)
     : Widget(r)

meson.build

@@ -1,26 +1,38 @@
 project('sdl2_basic_widgets', 'cpp',
-  version : '0.1',
-  default_options : ['warning_level=3', 'cpp_std=c++20'])
+    version : '0.1pre',
+    default_options : ['warning_level=3', 'cpp_std=c++20'])
 
-lib = static_library('sdl2_basic_widgets',
-           'horizontal_layout.cpp',
-           'layout.cpp',
-           'button.cpp',
-           'caption.cpp',
-           'vertical_layout.cpp',
-           'widget.cpp',
-           dependencies : [
-              dependency('sdl2'),
-              dependency('SDL2_ttf')
-              ],
-           install : true)
+sdl = [
+    dependency('sdl2'),
+    dependency('SDL2_ttf')
+    ]
+
+api = include_directories('api')
+
+libbasic_widgets = static_library('basic_widgets',
+    'horizontal_layout.cpp',
+    'layout.cpp',
+    'button.cpp',
+    'caption.cpp',
+    'vertical_layout.cpp',
+    'widget.cpp',
+    dependencies : sdl,
+    include_directories : api,
+    install : true)
+
+libbasic_widgets_dep = declare_dependency(
+    include_directories : api,
+    link_with: libbasic_widgets,
+    dependencies : sdl)
 
 executable('button_demo',
     'examples/button_example.cpp',
-    link_with : lib,
+    link_with : libbasic_widgets,
+    include_directories : api,
     install : false)
 
 executable('input_demo',
     'examples/input_example.cpp',
-    link_with : lib,
+    link_with : libbasic_widgets,
+    include_directories : api,
     install : false)

vertical_layout.cpp

@@ -1,6 +1,6 @@
 #include <iostream>
 
-#include "vertical_layout.hpp"
+#include <basic_widgets/vertical_layout.hpp>
 
 Vertical_Layout::Vertical_Layout(SDL_Renderer* r)
     : Layout(r)

widget.cpp

@@ -1,4 +1,4 @@
-#include "widget.hpp"
+#include <basic_widgets/widget.hpp>
 
 Widget::Widget(SDL_Renderer* r)
     : _renderer(r)