import jexer.event.TResizeEvent;
import jexer.backend.Backend;
import jexer.backend.Screen;
+import jexer.backend.MultiBackend;
import jexer.backend.SwingBackend;
import jexer.backend.ECMA48Backend;
import jexer.backend.TWindowBackend;
* The consumer loop.
*/
public void run() {
+ boolean first = true;
// Loop forever
while (!application.quit) {
}
}
- synchronized (this) {
- if (debugThreads) {
- System.err.printf("%s %s sleep\n", this,
- primary ? "primary" : "secondary");
- }
+ long timeout = 0;
+ if (first) {
+ first = false;
+ } else {
+ timeout = application.getSleepTime(1000);
+ }
+
+ if (timeout == 0) {
+ // A timer needs to fire, break out.
+ break;
+ }
- this.wait();
+ if (debugThreads) {
+ System.err.printf("%d %s %s sleep %d millis\n",
+ System.currentTimeMillis(), this,
+ primary ? "primary" : "secondary", timeout);
+ }
- if (debugThreads) {
- System.err.printf("%s %s AWAKE\n", this,
- primary ? "primary" : "secondary");
- }
+ synchronized (this) {
+ this.wait(timeout);
+ }
- if ((!primary)
- && (application.secondaryEventReceiver == null)
- ) {
- // Secondary thread, emergency exit. If we
- // got here then something went wrong with
- // the handoff between yield() and
- // closeWindow().
- synchronized (application.primaryEventHandler) {
- application.primaryEventHandler.notify();
- }
- application.secondaryEventHandler = null;
- throw new RuntimeException(
- "secondary exited at wrong time");
+ if (debugThreads) {
+ System.err.printf("%d %s %s AWAKE\n",
+ System.currentTimeMillis(), this,
+ primary ? "primary" : "secondary");
+ }
+
+ if ((!primary)
+ && (application.secondaryEventReceiver == null)
+ ) {
+ // Secondary thread, emergency exit. If we got
+ // here then something went wrong with the
+ // handoff between yield() and closeWindow().
+ synchronized (application.primaryEventHandler) {
+ application.primaryEventHandler.notify();
}
- break;
+ application.secondaryEventHandler = null;
+ throw new RuntimeException("secondary exited " +
+ "at wrong time");
}
+ break;
} catch (InterruptedException e) {
// SQUASH
}
- }
-
- // Wait for drawAll() or doIdle() to be done, then handle the
- // events.
- boolean oldLock = lockHandleEvent();
- assert (oldLock == false);
+ } // while (!application.quit)
// Pull all events off the queue
for (;;) {
}
event = application.drainEventQueue.remove(0);
}
+
+ // We will have an event to process, so repaint the
+ // screen at the end.
application.repaint = true;
+
if (primary) {
primaryHandleEvent(event);
} else {
// All done!
return;
}
- } // for (;;)
- // Unlock. Either I am primary thread, or I am secondary
- // thread and still running.
- oldLock = unlockHandleEvent();
- assert (oldLock == true);
+ } // for (;;)
- // I have done some work of some kind. Tell the main run()
- // loop to wake up now.
- synchronized (application) {
- application.notify();
+ // Fire timers, update screen.
+ if (!quit) {
+ application.finishEventProcessing();
}
} // while (true) (main runnable loop)
*/
private volatile TWidget secondaryEventReceiver;
- /**
- * Spinlock for the primary and secondary event handlers.
- * WidgetEventHandler.run() is responsible for setting this value.
- */
- private volatile boolean insideHandleEvent = false;
-
/**
* Wake the sleeping active event handler.
*/
}
}
- /**
- * Set the insideHandleEvent flag to true. lockoutEventHandlers() will
- * spin indefinitely until unlockHandleEvent() is called.
- *
- * @return the old value of insideHandleEvent
- */
- private boolean lockHandleEvent() {
- if (debugThreads) {
- System.err.printf(" >> lockHandleEvent(): oldValue %s",
- insideHandleEvent);
- }
- boolean oldValue = true;
-
- synchronized (this) {
- // Wait for TApplication.run() to finish using the global state
- // before allowing further event processing.
- while (lockoutHandleEvent == true) {
- try {
- // Backoff so that the backend can finish its work.
- Thread.sleep(5);
- } catch (InterruptedException e) {
- // SQUASH
- }
- }
-
- oldValue = insideHandleEvent;
- insideHandleEvent = true;
- }
-
- if (debugThreads) {
- System.err.printf(" ***\n");
- }
- return oldValue;
- }
-
- /**
- * Set the insideHandleEvent flag to false. lockoutEventHandlers() will
- * spin indefinitely until unlockHandleEvent() is called.
- *
- * @return the old value of insideHandleEvent
- */
- private boolean unlockHandleEvent() {
- if (debugThreads) {
- System.err.printf(" << unlockHandleEvent(): oldValue %s\n",
- insideHandleEvent);
- }
- synchronized (this) {
- boolean oldValue = insideHandleEvent;
- insideHandleEvent = false;
- return oldValue;
- }
- }
-
- /**
- * Spinlock for the primary and secondary event handlers. When true, the
- * event handlers will spinlock wait before calling handleEvent().
- */
- private volatile boolean lockoutHandleEvent = false;
-
- /**
- * TApplication.run() needs to be able rely on the global data structures
- * being intact when calling doIdle() and drawAll(). Tell the event
- * handlers to wait for an unlock before handling their events.
- */
- private void stopEventHandlers() {
- if (debugThreads) {
- System.err.printf(">> stopEventHandlers()");
- }
-
- lockoutHandleEvent = true;
- // Wait for the last event to finish processing before returning
- // control to TApplication.run().
- while (insideHandleEvent == true) {
- try {
- // Backoff so that the event handler can finish its work.
- Thread.sleep(1);
- } catch (InterruptedException e) {
- // SQUASH
- }
- }
-
- if (debugThreads) {
- System.err.printf(" XXX\n");
- }
- }
-
- /**
- * TApplication.run() needs to be able rely on the global data structures
- * being intact when calling doIdle() and drawAll(). Tell the event
- * handlers that it is now OK to handle their events.
- */
- private void startEventHandlers() {
- if (debugThreads) {
- System.err.printf("<< startEventHandlers()\n");
- }
- lockoutHandleEvent = false;
- }
-
// ------------------------------------------------------------------------
// TApplication attributes ------------------------------------------------
// ------------------------------------------------------------------------
*/
private volatile boolean repaint = true;
+ /**
+ * Repaint the screen on the next update.
+ */
+ public void doRepaint() {
+ repaint = true;
+ wakeEventHandler();
+ }
+
/**
* Y coordinate of the top edge of the desktop. For now this is a
* constant. Someday it would be nice to have a multi-line menu or
menuItems = new ArrayList<TMenuItem>();
desktop = new TDesktop(this);
- // Setup the main consumer thread
- primaryEventHandler = new WidgetEventHandler(this, true);
- (new Thread(primaryEventHandler)).start();
+ // Special case: the Swing backend needs to have a timer to drive its
+ // blink state.
+ if ((backend instanceof SwingBackend)
+ || (backend instanceof MultiBackend)
+ ) {
+ // Default to 500 millis, unless a SwingBackend has its own
+ // value.
+ long millis = 500;
+ if (backend instanceof SwingBackend) {
+ millis = ((SwingBackend) backend).getBlinkMillis();
+ }
+ if (millis > 0) {
+ addTimer(millis, true,
+ new TAction() {
+ public void DO() {
+ TApplication.this.doRepaint();
+ }
+ }
+ );
+ }
+ }
}
// ------------------------------------------------------------------------
// Screen refresh loop ----------------------------------------------------
// ------------------------------------------------------------------------
+ /**
+ * Process background events, and update the screen.
+ */
+ private void finishEventProcessing() {
+ if (debugThreads) {
+ System.err.printf(System.currentTimeMillis() + " " +
+ Thread.currentThread() + " finishEventProcessing()\n");
+ }
+
+ // Process timers and call doIdle()'s
+ doIdle();
+
+ // Update the screen
+ synchronized (getScreen()) {
+ drawAll();
+ }
+
+ if (debugThreads) {
+ System.err.printf(System.currentTimeMillis() + " " +
+ Thread.currentThread() + " finishEventProcessing() END\n");
+ }
+ }
+
/**
* Invert the cell color at a position. This is used to track the mouse.
*
*/
private void invertCell(final int x, final int y) {
if (debugThreads) {
- System.err.printf("invertCell() %d %d\n", x, y);
+ System.err.printf("%d %s invertCell() %d %d\n",
+ System.currentTimeMillis(), Thread.currentThread(), x, y);
}
CellAttributes attr = getScreen().getAttrXY(x, y);
attr.setForeColor(attr.getForeColor().invert());
*/
private void drawAll() {
if (debugThreads) {
- System.err.printf("drawAll() enter\n");
+ System.err.printf("%d %s drawAll() enter\n",
+ System.currentTimeMillis(), Thread.currentThread());
}
if (!repaint) {
if (debugThreads) {
- System.err.printf("drawAll() !repaint\n");
+ System.err.printf("%d %s drawAll() !repaint\n",
+ System.currentTimeMillis(), Thread.currentThread());
}
synchronized (getScreen()) {
if ((oldMouseX != mouseX) || (oldMouseY != mouseY)) {
}
if (debugThreads) {
- System.err.printf("drawAll() REDRAW\n");
+ System.err.printf("%d %s drawAll() REDRAW\n",
+ System.currentTimeMillis(), Thread.currentThread());
}
// If true, the cursor is not visible
if (sorted.size() > 0) {
activeWidget = sorted.get(sorted.size() - 1).getActiveChild();
if (activeWidget.isCursorVisible()) {
- getScreen().putCursor(true, activeWidget.getCursorAbsoluteX(),
- activeWidget.getCursorAbsoluteY());
- cursor = true;
+ if ((activeWidget.getCursorAbsoluteY() < desktopBottom)
+ && (activeWidget.getCursorAbsoluteY() > desktopTop)
+ ) {
+ getScreen().putCursor(true,
+ activeWidget.getCursorAbsoluteX(),
+ activeWidget.getCursorAbsoluteY());
+ cursor = true;
+ } else {
+ getScreen().putCursor(false,
+ activeWidget.getCursorAbsoluteX(),
+ activeWidget.getCursorAbsoluteY());
+ cursor = false;
+ }
}
}
*/
public void exit() {
quit = true;
+ synchronized (this) {
+ this.notify();
+ }
}
/**
* Run this application until it exits.
*/
public void run() {
- boolean first = true;
+ // Start the main consumer thread
+ primaryEventHandler = new WidgetEventHandler(this, true);
+ (new Thread(primaryEventHandler)).start();
while (!quit) {
- // Timeout is in milliseconds, so default timeout after 1 second
- // of inactivity.
- long timeout = 1000;
- if (first) {
- first = false;
- timeout = 0;
- }
-
- // If I've got no updates to render, wait for something from the
- // backend or a timer.
- if (!repaint
- && ((mouseX == oldMouseX) && (mouseY == oldMouseY))
- ) {
- // Never sleep longer than 50 millis. We need time for
- // windows with background tasks to update the display, and
- // still flip buffers reasonably quickly in
- // backend.flushPhysical().
- timeout = getSleepTime(50);
- }
-
- if (timeout > 0) {
- // As of now, I've got nothing to do: no I/O, nothing from
- // the consumer threads, no timers that need to run ASAP. So
- // wait until either the backend or the consumer threads have
- // something to do.
- try {
- if (debugThreads) {
- System.err.println("sleep " + timeout + " millis");
+ synchronized (this) {
+ boolean doWait = false;
+
+ synchronized (fillEventQueue) {
+ if (fillEventQueue.size() == 0) {
+ doWait = true;
}
- synchronized (this) {
- this.wait(timeout);
+ }
+
+ if (doWait) {
+ // No I/O to dispatch, so wait until the backend
+ // provides new I/O.
+ try {
+ if (debugThreads) {
+ System.err.println(System.currentTimeMillis() +
+ " MAIN sleep");
+ }
+
+ this.wait();
+
+ if (debugThreads) {
+ System.err.println(System.currentTimeMillis() +
+ " MAIN AWAKE");
+ }
+ } catch (InterruptedException e) {
+ // I'm awake and don't care why, let's see what's
+ // going on out there.
}
- } catch (InterruptedException e) {
- // I'm awake and don't care why, let's see what's going
- // on out there.
}
- repaint = true;
- }
- // Prevent stepping on the primary or secondary event handler.
- stopEventHandlers();
+ } // synchronized (this)
- // Pull any pending I/O events
- backend.getEvents(fillEventQueue);
+ synchronized (fillEventQueue) {
+ // Pull any pending I/O events
+ backend.getEvents(fillEventQueue);
- // Dispatch each event to the appropriate handler, one at a time.
- for (;;) {
- TInputEvent event = null;
- if (fillEventQueue.size() == 0) {
- break;
+ // Dispatch each event to the appropriate handler, one at a
+ // time.
+ for (;;) {
+ TInputEvent event = null;
+ if (fillEventQueue.size() == 0) {
+ break;
+ }
+ event = fillEventQueue.remove(0);
+ metaHandleEvent(event);
}
- event = fillEventQueue.remove(0);
- metaHandleEvent(event);
}
// Wake a consumer thread if we have any pending events.
wakeEventHandler();
}
- // Process timers and call doIdle()'s
- doIdle();
-
- // Update the screen
- synchronized (getScreen()) {
- drawAll();
- }
-
- // Let the event handlers run again.
- startEventHandlers();
-
} // while (!quit)
// Shutdown the event consumer threads
if (event instanceof TCommandEvent) {
TCommandEvent command = (TCommandEvent) event;
if (command.getCmd().equals(cmAbort)) {
- quit = true;
+ exit();
return;
}
}
- // Screen resize
- if (event instanceof TResizeEvent) {
- TResizeEvent resize = (TResizeEvent) event;
- synchronized (getScreen()) {
- getScreen().setDimensions(resize.getWidth(),
- resize.getHeight());
- desktopBottom = getScreen().getHeight() - 1;
- mouseX = 0;
- mouseY = 0;
- oldMouseX = 0;
- oldMouseY = 0;
- }
- if (desktop != null) {
- desktop.setDimensions(0, 0, resize.getWidth(),
- resize.getHeight() - 1);
+ synchronized (drainEventQueue) {
+ // Screen resize
+ if (event instanceof TResizeEvent) {
+ TResizeEvent resize = (TResizeEvent) event;
+ synchronized (getScreen()) {
+ getScreen().setDimensions(resize.getWidth(),
+ resize.getHeight());
+ desktopBottom = getScreen().getHeight() - 1;
+ mouseX = 0;
+ mouseY = 0;
+ oldMouseX = 0;
+ oldMouseY = 0;
+ }
+ if (desktop != null) {
+ desktop.setDimensions(0, 0, resize.getWidth(),
+ resize.getHeight() - 1);
+ }
+ return;
}
- return;
- }
- // Put into the main queue
- drainEventQueue.add(event);
+ // Put into the main queue
+ drainEventQueue.add(event);
+ }
}
/**
* @param widget widget that will receive events
*/
public final void enableSecondaryEventReceiver(final TWidget widget) {
+ if (debugThreads) {
+ System.err.println(System.currentTimeMillis() +
+ " enableSecondaryEventReceiver()");
+ }
+
assert (secondaryEventReceiver == null);
assert (secondaryEventHandler == null);
assert ((widget instanceof TMessageBox)
|| (widget instanceof TFileOpenBox));
secondaryEventReceiver = widget;
secondaryEventHandler = new WidgetEventHandler(this, false);
+
(new Thread(secondaryEventHandler)).start();
}
*/
public final void yield() {
assert (secondaryEventReceiver != null);
- // This is where we handoff the event handler lock from the primary
- // to secondary thread. We unlock here, and in a future loop the
- // secondary thread locks again. When it gives up, we have the
- // single lock back.
- boolean oldLock = unlockHandleEvent();
- assert (oldLock);
while (secondaryEventReceiver != null) {
synchronized (primaryEventHandler) {
*/
private void doIdle() {
if (debugThreads) {
- System.err.printf("doIdle()\n");
+ System.err.printf(System.currentTimeMillis() + " " +
+ Thread.currentThread() + " doIdle()\n");
}
- // Now run any timers that have timed out
- Date now = new Date();
- List<TTimer> keepTimers = new LinkedList<TTimer>();
- for (TTimer timer: timers) {
- if (timer.getNextTick().getTime() <= now.getTime()) {
- timer.tick();
- if (timer.recurring) {
+ synchronized (timers) {
+
+ if (debugThreads) {
+ System.err.printf(System.currentTimeMillis() + " " +
+ Thread.currentThread() + " doIdle() 2\n");
+ }
+
+ // Run any timers that have timed out
+ Date now = new Date();
+ List<TTimer> keepTimers = new LinkedList<TTimer>();
+ for (TTimer timer: timers) {
+ if (timer.getNextTick().getTime() <= now.getTime()) {
+ // Something might change, so repaint the screen.
+ repaint = true;
+ timer.tick();
+ if (timer.recurring) {
+ keepTimers.add(timer);
+ }
+ } else {
keepTimers.add(timer);
}
- } else {
- keepTimers.add(timer);
}
+ timers = keepTimers;
}
- timers = keepTimers;
// Call onIdle's
for (TWindow window: windows) {
* @param event new event to add to the queue
*/
public final void postMenuEvent(final TInputEvent event) {
- synchronized (fillEventQueue) {
- fillEventQueue.add(event);
+ synchronized (this) {
+ synchronized (fillEventQueue) {
+ fillEventQueue.add(event);
+ }
+ if (debugThreads) {
+ System.err.println(System.currentTimeMillis() + " " +
+ Thread.currentThread() + " postMenuEvent() wake up main");
+ }
+ closeMenu();
+ this.notify();
}
- closeMenu();
}
/**
if (command.equals(cmExit)) {
if (messageBox("Confirmation", "Exit application?",
TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) {
- quit = true;
+ exit();
}
return true;
}
if (menu.getId() == TMenu.MID_EXIT) {
if (messageBox("Confirmation", "Exit application?",
TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) {
- quit = true;
+ exit();
}
return true;
}
Date now = new Date();
long nowTime = now.getTime();
long sleepTime = timeout;
- for (TTimer timer: timers) {
- long nextTickTime = timer.getNextTick().getTime();
- if (nextTickTime < nowTime) {
- return 0;
- }
- long timeDifference = nextTickTime - nowTime;
- if (timeDifference < sleepTime) {
- sleepTime = timeDifference;
+ synchronized (timers) {
+ for (TTimer timer: timers) {
+ long nextTickTime = timer.getNextTick().getTime();
+ if (nextTickTime < nowTime) {
+ return 0;
+ }
+
+ long timeDifference = nextTickTime - nowTime;
+ if (timeDifference < sleepTime) {
+ sleepTime = timeDifference;
+ }
}
}
+
assert (sleepTime >= 0);
assert (sleepTime <= timeout);
return sleepTime;
git://git.nikiroo.be / fanfix.git / blobdiff