import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
+import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
*/
public class TApplication {
+ /**
+ * WidgetEventHandler is the main event consumer loop. There are at most
+ * two such threads in existence: the primary for normal case and a
+ * secondary that is used for TMessageBox, TInputBox, and similar.
+ */
+ private class WidgetEventHandler implements Runnable {
+ /**
+ * The main application.
+ */
+ private TApplication application;
+
+ /**
+ * Whether or not this WidgetEventHandler is the primary or secondary
+ * thread.
+ */
+ private boolean primary = true;
+
+ /**
+ * Public constructor.
+ *
+ * @param application the main application
+ * @param primary if true, this is the primary event handler thread
+ */
+ public WidgetEventHandler(final TApplication application,
+ final boolean primary) {
+
+ this.application = application;
+ this.primary = primary;
+ }
+
+ /**
+ * The consumer loop.
+ */
+ public void run() {
+
+ // Loop forever
+ while (!application.quit) {
+
+ // Wait until application notifies me
+ while (!application.quit) {
+ try {
+ synchronized (application.drainEventQueue) {
+ if (application.drainEventQueue.size() > 0) {
+ break;
+ }
+ }
+ synchronized (application) {
+ application.wait();
+ if ((!primary)
+ && (application.secondaryEventReceiver == null)
+ ) {
+ // Secondary thread, time to exit
+ return;
+ }
+ break;
+ }
+ } catch (InterruptedException e) {
+ // SQUASH
+ }
+ }
+
+ // Pull all events off the queue
+ for (;;) {
+ TInputEvent event = null;
+ synchronized (application.drainEventQueue) {
+ if (application.drainEventQueue.size() == 0) {
+ break;
+ }
+ event = application.drainEventQueue.remove(0);
+ }
+ if (primary) {
+ primaryHandleEvent(event);
+ } else {
+ secondaryHandleEvent(event);
+ }
+ if ((!primary)
+ && (application.secondaryEventReceiver == null)
+ ) {
+ // Secondary thread, time to exit
+ return;
+ }
+ }
+ } // while (true) (main runnable loop)
+ }
+ }
+
+ /**
+ * The primary event handler thread.
+ */
+ private WidgetEventHandler primaryEventHandler;
+
+ /**
+ * The secondary event handler thread.
+ */
+ private WidgetEventHandler secondaryEventHandler;
+
+ /**
+ * The widget receiving events from the secondary event handler thread.
+ */
+ private TWidget secondaryEventReceiver;
+
/**
* Access to the physical screen, keyboard, and mouse.
*/
backend = new ECMA48Backend(input, output);
theme = new ColorTheme();
desktopBottom = getScreen().getHeight() - 1;
- fillEventQueue = new LinkedList<TInputEvent>();
- drainEventQueue = new LinkedList<TInputEvent>();
+ fillEventQueue = new ArrayList<TInputEvent>();
+ drainEventQueue = new ArrayList<TInputEvent>();
windows = new LinkedList<TWindow>();
menus = new LinkedList<TMenu>();
subMenus = new LinkedList<TMenu>();
timers = new LinkedList<TTimer>();
accelerators = new HashMap<TKeypress, TMenuItem>();
+
+ // Setup the main consumer thread
+ primaryEventHandler = new WidgetEventHandler(this, true);
+ (new Thread(primaryEventHandler)).start();
}
/**
drawAll();
}
- /*
-
- // Shutdown the fibers
- eventQueue.length = 0;
- if (secondaryEventFiber !is null) {
- assert(secondaryEventReceiver !is null);
- secondaryEventReceiver = null;
- if (secondaryEventFiber.state == Fiber.State.HOLD) {
- // Wake up the secondary handler so that it can exit.
- secondaryEventFiber.call();
- }
+ // Shutdown the consumer threads
+ synchronized (this) {
+ this.notifyAll();
}
- if (primaryEventFiber.state == Fiber.State.HOLD) {
- // Wake up the primary handler so that it can exit.
- primaryEventFiber.call();
- }
- */
-
backend.shutdown();
}
}
}
- // TODO: change to two separate threads
- primaryHandleEvent(event);
-
- /*
-
// Put into the main queue
- addEvent(event);
-
- // Have one of the two consumer Fibers peel the events off
- // the queue.
- if (secondaryEventFiber !is null) {
- assert(secondaryEventFiber.state == Fiber.State.HOLD);
-
- // Wake up the secondary handler for these events
- secondaryEventFiber.call();
- } else {
- assert(primaryEventFiber.state == Fiber.State.HOLD);
-
- // Wake up the primary handler for these events
- primaryEventFiber.call();
- }
- */
+ synchronized (drainEventQueue) {
+ drainEventQueue.add(event);
+ }
+ // Wake all threads: primary thread will either be consuming events
+ // again or waiting in yield(), and secondary thread will either not
+ // exist or consuming events.
+ synchronized (this) {
+ this.notifyAll();
+ }
}
/**
* @see #primaryHandleEvent(TInputEvent event)
*/
private void secondaryHandleEvent(final TInputEvent event) {
- // TODO
+ secondaryEventReceiver.handleEvent(event);
+ }
+
+ /**
+ * Enable a widget to override the primary event thread.
+ *
+ * @param widget widget that will receive events
+ */
+ public final void enableSecondaryEventReceiver(final TWidget widget) {
+ assert (secondaryEventReceiver == null);
+ assert (secondaryEventHandler == null);
+ assert (widget instanceof TMessageBox);
+ secondaryEventReceiver = widget;
+ secondaryEventHandler = new WidgetEventHandler(this, false);
+ (new Thread(secondaryEventHandler)).start();
+
+ // Refresh
+ repaint = true;
+ }
+
+ /**
+ * Yield to the secondary thread.
+ */
+ public final void yield() {
+ assert (secondaryEventReceiver != null);
+ while (secondaryEventReceiver != null) {
+ synchronized (this) {
+ try {
+ this.wait();
+ } catch (InterruptedException e) {
+ // SQUASH
+ }
+ }
+ }
}
/**
for (TTimer timer: timers) {
if (timer.getNextTick().getTime() < now.getTime()) {
timer.tick();
- if (timer.recurring == true) {
+ if (timer.recurring) {
keepTimers.add(timer);
}
} else {
// Refresh screen
repaint = true;
- /*
- TODO
-
-
// Check if we are closing a TMessageBox or similar
- if (secondaryEventReceiver !is null) {
- assert(secondaryEventFiber !is null);
+ if (secondaryEventReceiver != null) {
+ assert (secondaryEventHandler != null);
// Do not send events to the secondaryEventReceiver anymore, the
// window is closed.
secondaryEventReceiver = null;
- // Special case: if this is called while executing on a
- // secondaryEventFiber, call it so that widgetEventHandler() can
- // terminate.
- if (secondaryEventFiber.state == Fiber.State.HOLD) {
- secondaryEventFiber.call();
- }
- secondaryEventFiber = null;
-
- // Unfreeze the logic in handleEvent()
- if (primaryEventFiber.state == Fiber.State.HOLD) {
- primaryEventFiber.call();
+ // Wake all threads: primary thread will be consuming events
+ // again, and secondary thread will exit.
+ synchronized (this) {
+ this.notifyAll();
}
}
- */
}
/**
* @return if true, this event was consumed
*/
protected boolean onCommand(final TCommandEvent command) {
- /*
- TODO
// Default: handle cmExit
if (command.equals(cmExit)) {
if (messageBox("Confirmation", "Exit application?",
- TMessageBox.Type.YESNO).result == TMessageBox.Result.YES) {
+ TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) {
quit = true;
}
repaint = true;
return true;
}
+ /*
+ TODO
if (command.equals(cmShell)) {
openTerminal(0, 0, TWindow.Flag.RESIZABLE);
repaint = true;
return true;
}
+ */
if (command.equals(cmTile)) {
tileWindows();
repaint = true;
return true;
}
- */
+
return false;
}
// Default: handle MID_EXIT
if (menu.getId() == TMenu.MID_EXIT) {
- /*
- TODO
if (messageBox("Confirmation", "Exit application?",
- TMessageBox.Type.YESNO).result == TMessageBox.Result.YES) {
+ TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) {
quit = true;
}
// System.err.printf("onMenu MID_EXIT result: quit = %s\n", quit);
repaint = true;
return true;
- */
- quit = true;
- repaint = true;
- return true;
}
/*
*
* @return the new menu
*/
- final public TMenu addWindowMenu() {
+ public final TMenu addWindowMenu() {
TMenu windowMenu = addMenu("&Window");
windowMenu.addDefaultItem(TMenu.MID_TILE);
windowMenu.addDefaultItem(TMenu.MID_CASCADE);
* @param duration number of milliseconds to wait between ticks
* @param recurring if true, re-schedule this timer after every tick
* @param action function to call when button is pressed
+ * @return the timer
*/
public final TTimer addTimer(final long duration, final boolean recurring,
final TAction action) {
}
}
+ /**
+ * Convenience function to spawn a message box.
+ *
+ * @param title window title, will be centered along the top border
+ * @param caption message to display. Use embedded newlines to get a
+ * multi-line box.
+ * @return the new message box
+ */
+ public final TMessageBox messageBox(final String title,
+ final String caption) {
+
+ return new TMessageBox(this, title, caption, TMessageBox.Type.OK);
+ }
+
+ /**
+ * Convenience function to spawn a message box.
+ *
+ * @param title window title, will be centered along the top border
+ * @param caption message to display. Use embedded newlines to get a
+ * multi-line box.
+ * @param type one of the TMessageBox.Type constants. Default is
+ * Type.OK.
+ * @return the new message box
+ */
+ public final TMessageBox messageBox(final String title,
+ final String caption, final TMessageBox.Type type) {
+
+ return new TMessageBox(this, title, caption, type);
+ }
+
+ /**
+ * Convenience function to spawn an input box.
+ *
+ * @param title window title, will be centered along the top border
+ * @param caption message to display. Use embedded newlines to get a
+ * multi-line box.
+ * @return the new input box
+ */
+ public final TInputBox inputBox(final String title, final String caption) {
+
+ return new TInputBox(this, title, caption);
+ }
+
+ /**
+ * Convenience function to spawn an input box.
+ *
+ * @param title window title, will be centered along the top border
+ * @param caption message to display. Use embedded newlines to get a
+ * multi-line box.
+ * @param text initial text to seed the field with
+ * @return the new input box
+ */
+ public final TInputBox inputBox(final String title, final String caption,
+ final String text) {
+
+ return new TInputBox(this, title, caption, text);
+ }
+
}
git://git.nikiroo.be / nikiroo-utils.git / blobdiff