Added ImGui support to Android.

android/app/jni/src/Android.mk

@@ -10,7 +10,7 @@ LOCAL_CPP_FEATURES := exceptions rtti
 CATA_SRCS := $(sort $(wildcard $(LOCAL_PATH)/*.cpp))
 LOCAL_SRC_FILES := $(sort $(CATA_SRCS:$(LOCAL_PATH)/%=%))
 
-LOCAL_STATIC_LIBRARIES := third-party
+LOCAL_STATIC_LIBRARIES := third-party imgui
 
 LOCAL_SHARED_LIBRARIES := libhidapi SDL2 SDL2_mixer SDL2_image SDL2_ttf mpg123
 
@@ -28,3 +28,4 @@ endif
 include $(BUILD_SHARED_LIBRARY)
 
 include $(LOCAL_PATH)/../android/app/jni/src/third-party/Android.mk
+include $(LOCAL_PATH)/../android/app/jni/src/third-party/imgui/Android.mk

android/app/jni/src/third-party/Android.mk

@@ -1,17 +1,15 @@
-LOCAL_PATH := $(call my-dir)/../../../../../src/third-party
-
 include $(CLEAR_VARS)
 
-LOCAL_C_INCLUDES := $(LOCAL_PATH) $(LOCAL_PATH)/..
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/third-party $(LOCAL_PATH)
 
-LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/third-party
 
 LOCAL_MODULE := third-party
 
 LOCAL_CPP_FEATURES := exceptions rtti
 
 # Add your application source files here...
-FLATBUFFERS_SRCS := $(sort $(wildcard $(LOCAL_PATH)/flatbuffers/*.cpp))
+FLATBUFFERS_SRCS := $(sort $(wildcard $(LOCAL_PATH)/third-party/flatbuffers/*.cpp))
 LOCAL_SRC_FILES := $(sort $(FLATBUFFERS_SRCS:$(LOCAL_PATH)/%=%))
 
 LOCAL_CFLAGS += -DBACKTRACE=1 -DLOCALIZE=1 -Wextra -Wall -fsigned-char

android/app/jni/src/third-party/imgui/Android.mk

@@ -0,0 +1,24 @@
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH) $(LOCAL_PATH)/third-party
+
+LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
+
+LOCAL_MODULE := imgui
+
+LOCAL_CPP_FEATURES := exceptions rtti
+
+LOCAL_SHARED_LIBRARIES := SDL2
+
+# Add your application source files here...
+IMGUI_SRCS := $(sort $(wildcard $(LOCAL_PATH)/third-party/imgui/*.cpp))
+LOCAL_SRC_FILES := $(sort $(IMGUI_SRCS:$(LOCAL_PATH)/%=%))
+
+LOCAL_CFLAGS += -DBACKTRACE=1 -DLOCALIZE=1 -fsigned-char
+
+ifeq ($(OS),Windows_NT)
+    # needed to bypass 8191 character limit on Windows command line
+	LOCAL_SHORT_COMMANDS = true
+endif
+
+include $(BUILD_STATIC_LIBRARY)

src/cata_imgui.cpp

@@ -11,6 +11,8 @@
 #include "output.h"
 #include "ui_manager.h"
 
+ImGuiKey cata_key_to_imgui( int cata_key );
+
 #if !(defined(TILES) || defined(WIN32))
 #include <curses.h>
 #include <imtui/imtui-impl-ncurses.h>
@@ -206,6 +208,43 @@ void cataimgui::client::process_input( void *input )
 
 #endif
 
+ImGuiKey cata_key_to_imgui( int cata_key )
+{
+    switch( cata_key ) {
+        case KEY_UP:
+            return ImGuiKey_UpArrow;
+        case KEY_DOWN:
+            return ImGuiKey_DownArrow;
+        case KEY_LEFT:
+            return ImGuiKey_LeftArrow;
+        case KEY_RIGHT:
+            return ImGuiKey_RightArrow;
+        case KEY_ENTER:
+            return ImGuiKey_Enter;
+        case KEY_ESCAPE:
+            return ImGuiKey_Escape;
+        default:
+            if( cata_key >= 'a' && cata_key <= 'z' ) {
+                return static_cast<ImGuiKey>( ImGuiKey_A + ( cata_key - 'a' ) );
+            } else if( cata_key >= 'A' && cata_key <= 'Z' ) {
+                return static_cast<ImGuiKey>( ImGuiKey_A + ( cata_key - 'A' ) );
+            } else if( cata_key >= '0' && cata_key <= 'Z' ) {
+                return static_cast<ImGuiKey>( ImGuiKey_A + ( cata_key - '0' ) );
+            }
+            return ImGuiKey_None;
+    }
+}
+
+void cataimgui::client::process_cata_input( const input_event &event )
+{
+    if( event.type == input_event_t::keyboard_code || event.type == input_event_t::keyboard_char ) {
+        int code = event.get_first_input();
+        ImGuiIO &io = ImGui::GetIO();
+        io.AddKeyEvent( cata_key_to_imgui( code ), true );
+        io.AddKeyEvent( cata_key_to_imgui( code ), false );
+    }
+}
+
 void cataimgui::point_to_imvec2( point *src, ImVec2 *dest )
 {
     if( src != nullptr && dest != nullptr ) {

src/cata_imgui.h

@@ -6,6 +6,7 @@
 #include <array>
 
 class nc_color;
+struct input_event;
 struct item_info_data;
 
 #if defined(WIN32) || defined(TILES)
@@ -49,6 +50,7 @@ class client
         void new_frame();
         void end_frame();
         void process_input( void *input );
+        void process_cata_input( const input_event &event );
 #if !(defined(TILES) || defined(WIN32))
         void upload_color_pair( int p, int f, int b );
         void set_alloced_pair_count( short count );

src/input_context.cpp

@@ -31,7 +31,6 @@
 #include "string_input_popup.h"
 #include "translations.h"
 #include "ui_manager.h"
-#if !defined(__ANDROID__)
 #include "cata_imgui.h"
 #include "imgui/imgui.h"
 
@@ -73,7 +72,6 @@ class keybindings_ui : public cataimgui::window
             init();
         };
 };
-#endif
 
 static const std::string default_context_id( "default" );
 
@@ -607,7 +605,6 @@ static const std::map<fallback_action, int> fallback_keys = {
     { fallback_action::execute, '.' },
 };
 
-#if !defined(__ANDROID__)
 keybindings_ui::keybindings_ui( bool permit_execute_action,
                                 input_context *parent ) : cataimgui::window( "KEYBINDINGS", ImGuiWindowFlags_NoNav )
 {
@@ -763,7 +760,7 @@ void keybindings_ui::init()
 {
     width = TERMX >= 100 ? 100 : 80;
 }
-#endif
+
 bool input_context::resolve_conflicts( const std::vector<input_event> &events,
                                        const std::string &ignore_action )
 {
@@ -1287,7 +1284,6 @@ action_id input_context::display_menu_legacy( const bool permit_execute_action )
     return action_to_execute;
 }
 
-#if !defined(__ANDROID__)
 action_id input_context::display_menu_imgui( const bool permit_execute_action )
 {
 
@@ -1468,19 +1464,14 @@ action_id input_context::display_menu_imgui( const bool permit_execute_action )
 
     return action_to_execute;
 }
-#endif
 
 action_id input_context::display_menu( bool permit_execute_action )
 {
-#if defined(__ANDROID__)
-    return display_menu_legacy( permit_execute_action );
-#else
     if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
         return display_menu_imgui( permit_execute_action );
     } else {
         return display_menu_legacy( permit_execute_action );
     }
-#endif
 }
 
 input_event input_context::get_raw_input()

src/input_context.h

@@ -20,9 +20,7 @@
 enum class kb_menu_status;
 
 class hotkey_queue;
-#if !defined(__ANDROID__)
 class keybindings_ui;
-#endif
 namespace catacurses
 {
 class window;
@@ -40,9 +38,7 @@ class window;
  */
 class input_context
 {
-#if !defined(__ANDROID__)
         friend class keybindings_ui;
-#endif
     public:
 #if defined(__ANDROID__)
         // Whatever's on top is our current input context.
@@ -462,9 +458,7 @@ class input_context
                 std::string_view phrase ) const;
 
         action_id display_menu_legacy( bool permit_execute_action );
-#if !defined(__ANDROID__)
         action_id display_menu_imgui( bool permit_execute_action );
-#endif
 };
 
 class hotkey_queue

src/main_menu.cpp

@@ -53,7 +53,6 @@
 #include "wcwidth.h"
 #include "worldfactory.h"
 
-#if !defined(__ANDROID__)
 #include "cata_imgui.h"
 #include "imgui/imgui.h"
 
@@ -114,7 +113,6 @@ void demo_ui::run()
         }
     }
 }
-#endif
 
 static const mod_id MOD_INFORMATION_dda( "dda" );
 
@@ -573,11 +571,9 @@ void main_menu::init_strings()
     vSettingsSubItems.emplace_back( pgettext( "Main Menu|Settings", "A<u|U>topickup" ) );
     vSettingsSubItems.emplace_back( pgettext( "Main Menu|Settings", "Sa<f|F>emode" ) );
     vSettingsSubItems.emplace_back( pgettext( "Main Menu|Settings", "Colo<r|R>s" ) );
-#if !defined(__ANDROID__)
     if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
         vSettingsSubItems.emplace_back( pgettext( "Main Menu|Settings", "<I|i>mGui Demo Screen" ) );
     }
-#endif
 
     vSettingsHotkeys.clear();
     for( const std::string &item : vSettingsSubItems ) {
@@ -923,13 +919,11 @@ bool main_menu::opening_screen()
                         get_safemode().show();
                     } else if( sel2 == 4 ) { /// Colors
                         all_colors.show_gui();
-#if !defined(__ANDROID__)
                     } else if( sel2 == 5 ) { /// ImGui demo
                         if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
                             demo_ui demo;
                             demo.run();
                         }
-#endif
                     }
                     break;
                 case main_menu_opts::WORLD:

src/popup.cpp

@@ -11,7 +11,6 @@
 #include "output.h"
 #include "ui_manager.h"
 #include "ui.h"
-#if !defined(__ANDROID__)
 #include "cata_imgui.h"
 #include "imgui/imgui.h"
 
@@ -140,7 +139,6 @@ void query_popup_impl::on_resized()
         }
     }
 }
-#endif
 
 query_popup::query_popup()
     : cur( 0 ), default_text_color( c_white ), anykey( false ), cancel( false ),
@@ -277,12 +275,10 @@ void query_popup::invalidate_ui() const
         }
         legacy_ui->mark_resize();
     }
-#if !defined(__ANDROID__)
     std::shared_ptr<query_popup_impl> imgui_ui = p_impl.lock();
     if( imgui_ui ) {
         imgui_ui->mark_resized();
     }
-#endif
 }
 
 static constexpr int border_width = 1;
@@ -502,18 +498,13 @@ query_popup::result query_popup::query_once_legacy()
 
 query_popup::result query_popup::query_once()
 {
-#if defined(__ANDROID__)
-    return query_once_legacy();
-#else
     if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
         return query_once_imgui();
     } else {
         return query_once_legacy();
     }
-#endif
 }
 
-#if !defined(__ANDROID__)
 std::shared_ptr<query_popup_impl> query_popup::create_or_get_impl()
 {
     std::shared_ptr<query_popup_impl> impl = p_impl.lock();
@@ -525,7 +516,6 @@ std::shared_ptr<query_popup_impl> query_popup::create_or_get_impl()
     }
     return impl;
 }
-#endif
 
 query_popup::result query_popup::query_once_imgui()
 {
@@ -624,15 +614,11 @@ query_popup::result query_popup::query_once_imgui()
 
 query_popup::result query_popup::query()
 {
-#if defined(__ANDROID__)
-    return query_legacy();
-#else
     if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
         return query_imgui();
     } else {
         return query_legacy();
     }
-#endif
 }
 
 query_popup::result query_popup::query_imgui()
@@ -703,13 +689,9 @@ bool query_popup::button::contains( const point &p ) const
 
 static_popup::static_popup()
 {
-#if defined(__ANDROID__)
-    ui = create_or_get_adaptor();
-#else
     if( get_options().has_option( "USE_IMGUI" ) && get_option<bool>( "USE_IMGUI" ) ) {
         ui_imgui = create_or_get_impl();
     } else {
         ui = create_or_get_adaptor();
     }
-#endif
 }

src/popup.h

@@ -13,9 +13,7 @@
 #include "input_enums.h"
 
 class ui_adaptor;
-#if !defined(__ANDROID__)
 class query_popup_impl;
-#endif
 
 /**
  * UI class for displaying messages or querying player input with popups.
@@ -37,9 +35,7 @@ class query_popup_impl;
 
 class query_popup
 {
-#if !defined(__ANDROID__)
         friend class query_popup_impl;
-#endif
     public:
         /**
          * Query result returned by `query_once` and `query`.
@@ -206,12 +202,10 @@ class query_popup
          * resizing of the popup.
          */
         std::shared_ptr<ui_adaptor> create_or_get_adaptor();
-#if !defined(__ANDROID__)
         std::shared_ptr<query_popup_impl> create_or_get_impl();
 
         result query_imgui();
         result query_once_imgui();
-#endif
         result query_legacy();
         result query_once_legacy();
 
@@ -302,9 +296,7 @@ class static_popup : public query_popup
 
     private:
         std::shared_ptr<ui_adaptor> ui;
-#if !defined(__ANDROID__)
         std::shared_ptr<query_popup_impl> ui_imgui;
-#endif
 };
 
 #endif // CATA_SRC_POPUP_H