Android rayshader sample.

samples/android_sample/jni/eventloop.cc

+#include "eventloop.h"
+#include "bin/log.h"
+
+EventLoop::EventLoop(android_app* pApplication) :
+  mEnabled(false),
+  mQuit(false),
+  mApplication(pApplication),
+  mActivityHandler(NULL),
+  mInputHandler(NULL) {
+  mApplication->onAppCmd = activityCallback;
+  mApplication->onInputEvent = inputCallback;
+  mApplication->userData = this;
+}
+
+void EventLoop::run(ActivityHandler* pActivityHandler,
+                    Context* pContext) {
+  int32_t lResult;
+  int32_t lEvents;
+  android_poll_source* lSource;
+
+  app_dummy();
+  mActivityHandler = pActivityHandler;
+  mInputHandler = pContext->mInputHandler;
+  Log::Print("Starting event loop");
+  while (true) {
+    // If not enabled, block on events. If enabled, don't block
+    // so we can do useful work in onStep.
+    while ((lResult = ALooper_pollAll(mEnabled ? 0 : -1,
+                                      NULL,
+                                      &lEvents,
+                                      (void**)&lSource)) >= 0) {
+      if (lSource != NULL) {
+        lSource->process(mApplication, lSource);
+      }
+      if (mApplication->destroyRequested) {
+        return;
+      }
+    }
+    if (mEnabled && !mQuit) {
+      Log::Print("step");
+      if (mActivityHandler->onStep() != 0) {
+        mQuit = true;
+        ANativeActivity_finish(mApplication->activity);
+      }
+    }
+  }
+}
+
+// Called when we gain focus.
+void EventLoop::activate() {
+  Log::Print("activate");
+  if (!mEnabled && mApplication->window != NULL) {
+    mQuit = false;
+    mEnabled = true;
+    if (mActivityHandler->onActivate() != 0) {
+      mQuit = true;
+      ANativeActivity_finish(mApplication->activity);
+    }
+  }
+}
+
+// Called when we lose focus.
+void EventLoop::deactivate() {
+  Log::Print("deactivate");
+  if (mEnabled) {
+    mActivityHandler->onDeactivate();
+    mEnabled = false;
+  }
+}
+
+void EventLoop::processActivityEvent(int32_t pCommand) {
+  switch (pCommand) {
+    case APP_CMD_CONFIG_CHANGED:
+      mActivityHandler->onConfigurationChanged();
+      break;
+    case APP_CMD_INIT_WINDOW:
+      mActivityHandler->onCreateWindow();
+      break;
+    case APP_CMD_DESTROY:
+      mActivityHandler->onDestroy();
+      break;
+    case APP_CMD_GAINED_FOCUS:
+      activate();
+      mActivityHandler->onGainedFocus();
+      break;
+    case APP_CMD_LOST_FOCUS:
+      mActivityHandler->onLostFocus();
+      deactivate();
+      break;
+    case APP_CMD_LOW_MEMORY:
+      mActivityHandler->onLowMemory();
+      break;
+    case APP_CMD_PAUSE:
+      mActivityHandler->onPause();
+      deactivate();
+      break;
+    case APP_CMD_RESUME:
+      mActivityHandler->onResume();
+      break;
+    case APP_CMD_SAVE_STATE:
+      mActivityHandler->onSaveState(&mApplication->savedState,
+                                    &mApplication->savedStateSize);
+      break;
+    case APP_CMD_START:
+      mActivityHandler->onStart();
+      break;
+    case APP_CMD_STOP:
+      mActivityHandler->onStop();
+      break;
+    case APP_CMD_TERM_WINDOW:
+      mActivityHandler->onDestroyWindow();
+      deactivate();
+      break;
+    default:
+      break;
+  }
+}
+
+void EventLoop::activityCallback(android_app* pApplication, int32_t pCommand) {
+  EventLoop* pEventLoop = (EventLoop*)pApplication->userData;
+  pEventLoop->processActivityEvent(pCommand);
+}
+
+int32_t EventLoop::processInputEvent(AInputEvent* pEvent) {
+  int32_t lEventType = AInputEvent_getType(pEvent);
+  Log::Print("Got input event type %d", lEventType);
+  switch (lEventType) {
+    case AINPUT_EVENT_TYPE_MOTION:
+      if (AInputEvent_getSource(pEvent) == AINPUT_SOURCE_TOUCHSCREEN) {
+          return mInputHandler->onTouchEvent(pEvent);
+      }
+      break;
+    case AINPUT_EVENT_TYPE_KEY:
+      return mInputHandler->onKeyEvent(pEvent);
+  }
+  return 0;
+}
+
+int32_t EventLoop::inputCallback(android_app* pApplication,
+                                 AInputEvent* pEvent) {
+  EventLoop& lEventLoop = *(EventLoop*) pApplication->userData;
+  return lEventLoop.processInputEvent(pEvent);
+}
+