From 626ecbfca04e95bcb42390827112b2d7de1c903f Mon Sep 17 00:00:00 2001
From: Matthias Melcher <fltk@matthiasm.com>
Date: Wed, 7 Mar 2018 23:01:50 +0000
Subject: Android: specific event for Android. Use Fl::add_system_handler() and
 Fl::event(), for example: FL_ANDROID_EVENT_LOW_MEMORY

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12720 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Enumerations.H                                  | 24 ++++++++++++++++++++++
 .../app/src/main/cpp/HelloAndroid.cxx              |  8 ++++++++
 src/drivers/Android/Fl_Android_Screen_Driver.cxx   | 13 +++++++++++-
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/FL/Enumerations.H b/FL/Enumerations.H
index 2a1908f8e..d97298073 100644
--- a/FL/Enumerations.H
+++ b/FL/Enumerations.H
@@ -406,6 +406,30 @@ enum Fl_Event {	// events
   FL_ZOOM_GESTURE	= 26
 
 // DEV NOTE: Keep this list in sync with FL/names.h
+
+#ifdef __ANDROID__
+  // These events are specific to the Android OS driver system. They can
+  // be read by adding a callback via Fl::add_system_handler() and reading Fl::event()
+  // Dont's change the order of these enums! See Fl_Android_Application.H .
+  , FL_ANDROID_EVENTS = 0x00010000,
+  FL_ANDROID_EVENT_INPUT_CHANGED,
+  FL_ANDROID_EVENT_INIT_WINDOW,
+  FL_ANDROID_EVENT_TERM_WINDOW,
+  FL_ANDROID_EVENT_WINDOW_RESIZED,
+  FL_ANDROID_EVENT_WINDOW_REDRAW_NEEDED,
+  FL_ANDROID_EVENT_CONTENT_RECT_CHANGED,
+  FL_ANDROID_EVENT_GAINED_FOCUS,
+  FL_ANDROID_EVENT_LOST_FOCUS,
+  FL_ANDROID_EVENT_CONFIG_CHANGED,
+  FL_ANDROID_EVENT_LOW_MEMORY,
+  FL_ANDROID_EVENT_START,
+  FL_ANDROID_EVENT_RESUME,
+  FL_ANDROID_EVENT_SAVE_STATE,
+  FL_ANDROID_EVENT_PAUSE,
+  FL_ANDROID_EVENT_STOP,
+  FL_ANDROID_EVENT_DESTROY
+#endif
+
 };
 
 /** \name When Conditions */
diff --git a/ide/AndroidStudio3/app/src/main/cpp/HelloAndroid.cxx b/ide/AndroidStudio3/app/src/main/cpp/HelloAndroid.cxx
index 3c99fb148..911683944 100644
--- a/ide/AndroidStudio3/app/src/main/cpp/HelloAndroid.cxx
+++ b/ide/AndroidStudio3/app/src/main/cpp/HelloAndroid.cxx
@@ -15,6 +15,7 @@
  *
  */
 
+#include <src/drivers/Android/Fl_Android_Application.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Button.H>
 #include <FL/Enumerations.H>
@@ -22,8 +23,15 @@
 Fl_Window *win;
 Fl_Button *btn;
 
+int h(void*, void*)
+{
+  Fl_Android_Application::log_w("App global even %p", Fl::event());
+  return 0;
+}
+
 int main(int argc, char **argv)
 {
+  Fl::add_system_handler(h, 0);
   win = new Fl_Window(10, 10, 600, 400, "Hallo");
   btn = new Fl_Button(190, 200, 280, 35, "Hello, Android!");
   btn->color(FL_LIGHT2);
diff --git a/src/drivers/Android/Fl_Android_Screen_Driver.cxx b/src/drivers/Android/Fl_Android_Screen_Driver.cxx
index 9156d8c83..be2c94248 100644
--- a/src/drivers/Android/Fl_Android_Screen_Driver.cxx
+++ b/src/drivers/Android/Fl_Android_Screen_Driver.cxx
@@ -59,11 +59,22 @@ Fl_Screen_Driver *Fl_Screen_Driver::newScreenDriver()
   return new Fl_Android_Screen_Driver();
 }
 
+
+extern int fl_send_system_handlers(void *e);
+
 int Fl_Android_Screen_Driver::handle_app_command()
 {
+  // get the command
   int8_t cmd = Fl_Android_Application::read_cmd();
+
+  // setup the Android glue and prepare all settings for calling into FLTK
   Fl_Android_Application::pre_exec_cmd(cmd);
-  // TODO: call Fl::handle() with event parametrs set
+
+  // call all registered FLTK system handlers
+  Fl::e_number = ((uint32_t)cmd-APP_CMD_INPUT_CHANGED) + FL_ANDROID_EVENT_INPUT_CHANGED;
+  fl_send_system_handlers(0L);
+
+  // fixup and finalize application wide command handling
   Fl_Android_Application::post_exec_cmd(cmd);
   return 1;
 }
-- 
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