[DEV] better application state manager

src/org/atriasoft/gale/Application.java

@@ -12,7 +12,6 @@ import org.atriasoft.gale.key.KeyStatus;
 import org.atriasoft.gale.key.KeyType;
 
 public class Application {
-	public boolean canDraw = false;
 	private boolean needRedraw = true;
 	private String title = "gale";
 	private Uri iconName = null;

src/org/atriasoft/gale/backend3d/OpenGL.java

@@ -575,6 +575,7 @@ public class OpenGL {
 	 *  remove the current matrix and get the last one from the matrix stack.
 	 */
 	public static void pop() {
+		Log.verbose("Pop OpenGl Matrix: " + MATRIX_LIST.size());
 		if (MATRIX_LIST.size() <= 1) {
 			Log.error("set matrix list is not corect size in the stack : " + MATRIX_LIST.size());
 			MATRIX_LIST.clear();
@@ -851,6 +852,7 @@ public class OpenGL {
 	 *  store current matrix in the matrix stack.
 	 */
 	public static void push() {
+		Log.verbose("push OpenGl Matrix: " + MATRIX_LIST.size());
 		if (MATRIX_LIST.size() == 0) {
 			Log.error("set matrix list is not corect size in the stack : " + MATRIX_LIST.size());
 			MATRIX_LIST.add(Matrix4f.IDENTITY);
@@ -870,9 +872,7 @@ public class OpenGL {
 			}
 			reader.close();
 		} catch (final IOException e) {
-			Log.error("Could not read the file!");
-			e.printStackTrace();
-			System.exit(-1);
+			Log.critical("Could not read the file!");
 		}
 		return fileSource;
 	}
@@ -882,8 +882,7 @@ public class OpenGL {
 		try {
 			final InputStream inputStream = Uri.getStream(name);
 			if (inputStream == null) {
-				Log.error("Could not read the file! " + name);
-				System.exit(-1);
+				Log.critical("Could not read the file! " + name);
 			}
 			final Reader reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName(StandardCharsets.UTF_8.name())));
 			int c = 0;

src/org/atriasoft/gale/context/Context.java

@@ -2,6 +2,7 @@ package org.atriasoft.gale.context;
 
 import java.util.Vector;
 
+import org.atriasoft.etk.Color;
 import org.atriasoft.etk.ThreadAbstract;
 import org.atriasoft.etk.Uri;
 import org.atriasoft.etk.math.Vector2f;
@@ -21,6 +22,10 @@ interface ActionToDoInAsyncLoop {
 	public void run(Context context);
 }
 
+enum ApplicationState {
+	UNDEFINED, CREATE, RUNNING, DIED
+};
+
 public abstract class Context {
 	protected static final int MAX_MANAGE_INPUT = 15;
 	private static Context globalContext = null;
@@ -41,6 +46,7 @@ public abstract class Context {
 	
 	protected ThreadAbstract periodicThread;;
 	protected Application application; //!< Application handle
+	protected ApplicationState applicationState = ApplicationState.UNDEFINED; // state of the application
 	private final CommandLine commandLine = new CommandLine(); //!< Start command line information;
 	private final ResourceManager resourceManager = new ResourceManager(); //!< global resources Manager
 	// simulation area:
@@ -58,6 +64,7 @@ public abstract class Context {
 	public Context(final Application application, final String[] args) {
 		// set a basic
 		this.application = application;
+		this.applicationState = ApplicationState.CREATE;
 		setContext(this);
 		Thread.currentThread().setName("galeThread");
 		if (this.application == null) {
@@ -104,12 +111,13 @@ public abstract class Context {
 		postAction((context) -> {
 			final Application appl = context.getApplication();
 			if (appl == null) {
+				this.applicationState = ApplicationState.UNDEFINED;
 				return;
 			}
 			appl.onCreate(context);
 			appl.onStart(context);
 			appl.onResume(context);
-			appl.canDraw = true;
+			this.applicationState = ApplicationState.RUNNING;
 		});
 		
 		// force a recalculation
@@ -278,7 +286,7 @@ public abstract class Context {
 		if (countMemeCheck++ >= 10 * 16) {
 			countMemeCheck = 0;
 		}
-		//Log.verbose("Call draw");
+		Log.verbose("Call draw");
 		final long currentTime = System.currentTimeMillis();
 		//echrono::Time currentTime2 = echrono::Time::now();
 		//Log.warning("Time = " << currentTime << "         " << currentTime2);
@@ -316,10 +324,14 @@ public abstract class Context {
 			
 			*/
 			if (this.application != null) {
+				if (this.applicationState == ApplicationState.RUNNING) {
 					// Redraw all needed elements
 					//Log.debug("Regenerate Display");
 					this.application.onRegenerateDisplay(this);
 					needRedraw = this.application.isDrawingNeeded();
+				} else {
+					needRedraw = true;
+				}
 			}
 			if (this.displayFps) {
 				this.fpsSystemEvent.incrementCounter();
@@ -354,8 +366,13 @@ public abstract class Context {
 					this.fpsSystem.incrementCounter();
 					// set the current interface :
 					lockContext();
-					if (this.application.canDraw) {
+					if (this.applicationState == ApplicationState.RUNNING) {
 						this.application.onDraw(this);
+					} else {
+						OpenGL.setViewPort(new Vector2f(0, 0), this.application.getSize());
+						final Color bgColor = new Color(0.8f, 0.5f, 0.8f, 1.0f);
+						OpenGL.clearColor(bgColor);
+						Log.info("==> appl clear ==> not created ...");
 					}
 					unLockContext();
 					hasDisplayDone = true;

src/org/atriasoft/gale/resource/ResourceManager.java

@@ -23,12 +23,12 @@ public class ResourceManager {
 	/**
 	 * special end of application
 	 */
-	public void applicationExiting() {
+	public synchronized void applicationExiting() {
 		contextHasBeenDestroyed();
 		this.exiting = true;
 	}
 	
-	public void cleanInternalRemoved() {
+	public synchronized void cleanInternalRemoved() {
 		//Log.info("remove object in Manager");
 		updateContext();
 		// TODO ...
@@ -43,7 +43,7 @@ public class ResourceManager {
 	/**
 	 * This is to inform the resources manager that we have no more openGl context ...
 	 */
-	public void contextHasBeenDestroyed() {
+	public synchronized void contextHasBeenDestroyed() {
 		for (final Resource it : this.resourceList) {
 			if (it.getCount() > 0) {
 				it.removeContextToLate();
@@ -56,7 +56,7 @@ public class ResourceManager {
 	/**
 	 * display in the log all the resources loaded ...
 	 */
-	public void display() {
+	public synchronized void display() {
 		Log.info("Resources loaded : ");
 		// remove all resources ...
 		for (final Resource it : this.resourceList) {
@@ -65,13 +65,13 @@ public class ResourceManager {
 		Log.info("Resources ---");
 	}
 	
-	public void localAdd(final Resource object) {
+	public synchronized void localAdd(final Resource object) {
 		// add at the end if no slot is free
 		this.resourceList.add(object);
 	}
 	
 	// internal API to extent eResources in extern Soft
-	public Resource localKeep(final String filename) {
+	public synchronized Resource localKeep(final String filename) {
 		Log.verbose("KEEP (DEFAULT) : file : '" + filename + "' in " + this.resourceList.size() + " resources");
 		for (final Resource it : this.resourceList) {
 			if (it == null) {
@@ -91,7 +91,7 @@ public class ResourceManager {
 		return null;
 	}
 	
-	public Resource localKeep(final Uri uri) {
+	public synchronized Resource localKeep(final Uri uri) {
 		// TODO Auto-generated method stub
 		return localKeep(uri.toString());
 	}
@@ -100,7 +100,7 @@ public class ResourceManager {
 	 * Reload all resources from files, and send there in openGL card if needed.
 	 * @note If file is reference at THEMEXXX:///filename if the Theme change the file will reload the newOne
 	 */
-	public void reLoadResources() {
+	public synchronized void reLoadResources() {
 		Log.info("-------------  Resources re-loaded  -------------");
 		// remove all resources ...
 		for (long jjj = 0; jjj < MAX_RESOURCE_LEVEL; jjj++) {
@@ -127,7 +127,7 @@ public class ResourceManager {
 	/**
 	 * remove all resources (un-init) out of the destructor (due to the system implementation)
 	 */
-	public void unInit() {
+	public synchronized void unInit() {
 		display();
 		this.resourceListToUpdate.clear();
 		// remove all resources ...
@@ -141,7 +141,7 @@ public class ResourceManager {
 	 * Call by the system to send all the needed data on the graphic card chen they change ...
 	 * @param object The resources that might be updated
 	 */
-	public void update(final Resource object) {
+	public synchronized void update(final Resource object) {
 		// check if not added before
 		for (final Resource it : this.resourceListToUpdate) {
 			if (it == object) {
@@ -156,7 +156,7 @@ public class ResourceManager {
 	/**
 	 * Call by the system chen the openGL Context has been unexpectially removed  == > This reload all the texture, VBO and other ....
 	 */
-	public void updateContext() {
+	public synchronized void updateContext() {
 		if (this.exiting) {
 			Log.error("Request update after application EXIT ...");
 			return;