X-Git-Url: http://git.nikiroo.be/?a=blobdiff_plain;f=src%2Fjexer%2FTApplication.java;h=5813d6f3ca15402ebbee2fbc0f592744c4c5e8e3;hb=bb35d91958450cc7152d2063f1d6cd34c15e2a3d;hp=d4a6610834fa2994372ae3700efdf76a3c633718;hpb=48e27807150e00bc9a92844382ebc8cedf1d265f;p=fanfix.git diff --git a/src/jexer/TApplication.java b/src/jexer/TApplication.java index d4a6610..5813d6f 100644 --- a/src/jexer/TApplication.java +++ b/src/jexer/TApplication.java @@ -33,8 +33,13 @@ package jexer; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; +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; import jexer.bits.CellAttributes; import jexer.bits.ColorTheme; @@ -42,11 +47,15 @@ import jexer.bits.GraphicsChars; import jexer.event.TCommandEvent; import jexer.event.TInputEvent; import jexer.event.TKeypressEvent; +import jexer.event.TMenuEvent; import jexer.event.TMouseEvent; import jexer.event.TResizeEvent; import jexer.backend.Backend; +import jexer.backend.AWTBackend; import jexer.backend.ECMA48Backend; import jexer.io.Screen; +import jexer.menu.TMenu; +import jexer.menu.TMenuItem; import static jexer.TCommand.*; import static jexer.TKeypress.*; @@ -55,6 +64,273 @@ import static jexer.TKeypress.*; */ public class TApplication { + /** + * If true, emit thread stuff to System.err. + */ + private static final boolean debugThreads = false; + + /** + * If true, emit events being processed to System.err. + */ + private static final boolean debugEvents = false; + + /** + * 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 (this) { + /* + System.err.printf("%s %s sleep\n", this, primary ? + "primary" : "secondary"); + */ + + this.wait(); + + /* + System.err.printf("%s %s AWAKE\n", 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(). + + System.err.printf("secondary exiting at wrong time, why?\n"); + synchronized (application.primaryEventHandler) { + application.primaryEventHandler.notify(); + } + application.secondaryEventHandler = null; + 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); + } + // Wait for drawAll() or doIdle() to be done, then handle + // the event. + boolean oldLock = lockHandleEvent(); + assert (oldLock == false); + if (primary) { + primaryHandleEvent(event); + } else { + secondaryHandleEvent(event); + } + application.repaint = true; + if ((!primary) + && (application.secondaryEventReceiver == null) + ) { + // Secondary thread, time to exit. + + // DO NOT UNLOCK. Primary thread just came back from + // primaryHandleEvent() and will unlock in the else + // block below. Just wake it up. + synchronized (application.primaryEventHandler) { + application.primaryEventHandler.notify(); + } + // Now eliminate my reference so that + // wakeEventHandler() resumes working on the primary. + application.secondaryEventHandler = null; + + // All done! + return; + } else { + // 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(); + } + + } // while (true) (main runnable loop) + } + } + + /** + * The primary event handler thread. + */ + private volatile WidgetEventHandler primaryEventHandler; + + /** + * The secondary event handler thread. + */ + private volatile WidgetEventHandler secondaryEventHandler; + + /** + * The widget receiving events from the secondary event handler thread. + */ + 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. + */ + private void wakeEventHandler() { + if (secondaryEventHandler != null) { + synchronized (secondaryEventHandler) { + secondaryEventHandler.notify(); + } + } else { + assert (primaryEventHandler != null); + synchronized (primaryEventHandler) { + primaryEventHandler.notify(); + } + } + } + + /** + * 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); + + 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); + + 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; + } + /** * Access to the physical screen, keyboard, and mouse. */ @@ -80,9 +356,35 @@ public class TApplication { private int mouseY; /** - * Event queue that will be drained by either primary or secondary Fiber. + * Event queue that is filled by run(). + */ + private List fillEventQueue; + + /** + * Event queue that will be drained by either primary or secondary + * Thread. */ - private List eventQueue; + private List drainEventQueue; + + /** + * Top-level menus in this application. + */ + private List menus; + + /** + * Stack of activated sub-menus in this application. + */ + private List subMenus; + + /** + * The currently acive menu. + */ + private TMenu activeMenu = null; + + /** + * Active keyboard accelerators. + */ + private Map accelerators; /** * Windows and widgets pull colors from this ColorTheme. @@ -99,24 +401,28 @@ public class TApplication { } /** - * When true, exit the application. + * The top-level windows (but not menus). */ - private boolean quit = false; + private List windows; /** - * When true, repaint the entire screen. + * Timers that are being ticked. */ - private boolean repaint = true; + private List timers; /** - * Request full repaint on next screen refresh. + * When true, exit the application. */ - public void setRepaint() { - repaint = true; - } + private volatile boolean quit = false; /** - * When true, just flush updates from the screen. + * When true, repaint the entire screen. + */ + private volatile boolean repaint = true; + + /** + * When true, just flush updates from the screen. This is only used to + * minimize physical writes for the mouse cursor. */ private boolean flush = false; @@ -166,75 +472,103 @@ public class TApplication { public TApplication(final InputStream input, final OutputStream output) throws UnsupportedEncodingException { - backend = new ECMA48Backend(input, output); - theme = new ColorTheme(); - desktopBottom = backend.getScreen().getHeight() - 1; - eventQueue = new LinkedList(); + // AWT is the default backend on Windows unless explicitly overridden + // by jexer.AWT. + boolean useAWT = false; + if (System.getProperty("os.name").startsWith("Windows")) { + useAWT = true; + } + if (System.getProperty("jexer.AWT") != null) { + if (System.getProperty("jexer.AWT", "false").equals("true")) { + useAWT = true; + } else { + useAWT = false; + } + } + + + if (useAWT) { + backend = new AWTBackend(this); + } else { + backend = new ECMA48Backend(this, input, output); + } + theme = new ColorTheme(); + desktopBottom = getScreen().getHeight() - 1; + fillEventQueue = new ArrayList(); + drainEventQueue = new ArrayList(); + windows = new LinkedList(); + menus = new LinkedList(); + subMenus = new LinkedList(); + timers = new LinkedList(); + accelerators = new HashMap(); + + // Setup the main consumer thread + primaryEventHandler = new WidgetEventHandler(this, true); + (new Thread(primaryEventHandler)).start(); } /** * Invert the cell at the mouse pointer position. */ private void drawMouse() { - CellAttributes attr = backend.getScreen().getAttrXY(mouseX, mouseY); + CellAttributes attr = getScreen().getAttrXY(mouseX, mouseY); attr.setForeColor(attr.getForeColor().invert()); attr.setBackColor(attr.getBackColor().invert()); - backend.getScreen().putAttrXY(mouseX, mouseY, attr, false); + getScreen().putAttrXY(mouseX, mouseY, attr, false); flush = true; - /* - if (windows.length == 0) { + if (windows.size() == 0) { repaint = true; } - */ - // TODO: remove this repaint after the above if (windows.length == 0) - // can be used again. - repaint = true; } /** * Draw everything. */ public final void drawAll() { + if (debugThreads) { + System.err.printf("drawAll() enter\n"); + } + if ((flush) && (!repaint)) { backend.flushScreen(); flush = false; return; } - if (!repaint) { - return; + if (debugThreads) { + System.err.printf("drawAll() REDRAW\n"); } // If true, the cursor is not visible boolean cursor = false; // Start with a clean screen - backend.getScreen().clear(); + getScreen().clear(); // Draw the background CellAttributes background = theme.getColor("tapplication.background"); - backend.getScreen().putAll(GraphicsChars.HATCH, background); + getScreen().putAll(GraphicsChars.HATCH, background); - /* // Draw each window in reverse Z order - TWindow [] sorted = windows.dup; - sorted.sort.reverse; - foreach (w; sorted) { - w.drawChildren(); + List sorted = new LinkedList(windows); + Collections.sort(sorted); + Collections.reverse(sorted); + for (TWindow window: sorted) { + window.drawChildren(); } // Draw the blank menubar line - reset the screen clipping first so // it won't trim it out. - backend.getScreen().resetClipping(); - backend.getScreen().hLineXY(0, 0, backend.getScreen().getWidth(), ' ', + getScreen().resetClipping(); + getScreen().hLineXY(0, 0, getScreen().getWidth(), ' ', theme.getColor("tmenu")); // Now draw the menus. int x = 1; - foreach (m; menus) { + for (TMenu menu: menus) { CellAttributes menuColor; CellAttributes menuMnemonicColor; - if (m.active) { + if (menu.getActive()) { menuColor = theme.getColor("tmenu.highlighted"); menuMnemonicColor = theme.getColor("tmenu.mnemonic.highlighted"); } else { @@ -242,48 +576,45 @@ public class TApplication { menuMnemonicColor = theme.getColor("tmenu.mnemonic"); } // Draw the menu title - backend.getScreen().hLineXY(x, 0, cast(int)m.title.length + 2, ' ', + getScreen().hLineXY(x, 0, menu.getTitle().length() + 2, ' ', menuColor); - backend.getScreen().putStrXY(x + 1, 0, m.title, menuColor); + getScreen().putStrXY(x + 1, 0, menu.getTitle(), menuColor); // Draw the highlight character - backend.getScreen().putCharXY(x + 1 + m.mnemonic.shortcutIdx, 0, - m.mnemonic.shortcut, menuMnemonicColor); + getScreen().putCharXY(x + 1 + menu.getMnemonic().getShortcutIdx(), + 0, menu.getMnemonic().getShortcut(), menuMnemonicColor); - if (m.active) { - m.drawChildren(); + if (menu.getActive()) { + menu.drawChildren(); // Reset the screen clipping so we can draw the next title. - backend.getScreen().resetClipping(); + getScreen().resetClipping(); } - x += m.title.length + 2; + x += menu.getTitle().length() + 2; } - foreach (m; subMenus) { + for (TMenu menu: subMenus) { // Reset the screen clipping so we can draw the next sub-menu. - backend.getScreen().resetClipping(); - m.drawChildren(); + getScreen().resetClipping(); + menu.drawChildren(); } - */ // Draw the mouse pointer drawMouse(); - /* // Place the cursor if it is visible TWidget activeWidget = null; - if (sorted.length > 0) { - activeWidget = sorted[$ - 1].getActiveChild(); - if (activeWidget.hasCursor) { - backend.getScreen().putCursor(true, activeWidget.getCursorAbsoluteX(), + if (sorted.size() > 0) { + activeWidget = sorted.get(sorted.size() - 1).getActiveChild(); + if (activeWidget.visibleCursor()) { + getScreen().putCursor(true, activeWidget.getCursorAbsoluteX(), activeWidget.getCursorAbsoluteY()); cursor = true; } } // Kill the cursor - if (cursor == false) { - backend.getScreen().hideCursor(); + if (!cursor) { + getScreen().hideCursor(); } - */ // Flush the screen contents backend.flushScreen(); @@ -296,193 +627,389 @@ public class TApplication { * Run this application until it exits. */ public final void run() { - List events = new LinkedList(); - while (!quit) { // Timeout is in milliseconds, so default timeout after 1 second // of inactivity. - int timeout = getSleepTime(1000); + long timeout = 0; + + // If I've got no updates to render, wait for something from the + // backend or a timer. + if (!repaint && !flush) { + // Never sleep longer than 100 millis, to get windows with + // background tasks an opportunity to update the display. + timeout = getSleepTime(100); + + // See if there are any definitely events waiting to be + // processed. If so, do not wait -- either there is I/O + // coming in or the primary/secondary threads are still + // working. + synchronized (drainEventQueue) { + if (drainEventQueue.size() > 0) { + timeout = 0; + } + } + synchronized (fillEventQueue) { + if (fillEventQueue.size() > 0) { + timeout = 0; + } + } + } - if (eventQueue.size() > 0) { - // Do not wait if there are definitely events waiting to be - // processed or a screen redraw to do. - timeout = 0; + 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 { + synchronized (this) { + this.wait(timeout); + } + } catch (InterruptedException e) { + // I'm awake and don't care why, let's see what's going + // on out there. + } } - // Pull any pending input events - backend.getEvents(events, timeout); - metaHandleEvents(events); - events.clear(); + // Pull any pending I/O events + backend.getEvents(fillEventQueue); + + // Dispatch each event to the appropriate handler, one at a time. + for (;;) { + TInputEvent event = null; + synchronized (fillEventQueue) { + if (fillEventQueue.size() == 0) { + break; + } + event = fillEventQueue.remove(0); + } + metaHandleEvent(event); + } + + // Wake a consumer thread if we have any pending events. + synchronized (drainEventQueue) { + if (drainEventQueue.size() > 0) { + wakeEventHandler(); + } + } + + // Prevent stepping on the primary or secondary event handler. + stopEventHandlers(); // Process timers and call doIdle()'s doIdle(); // Update the screen - drawAll(); - } + synchronized (getScreen()) { + drawAll(); + } - /* + // Let the event handlers run again. + startEventHandlers(); - // 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(); + } // while (!quit) + + // Shutdown the event consumer threads + if (secondaryEventHandler != null) { + synchronized (secondaryEventHandler) { + secondaryEventHandler.notify(); } } - - if (primaryEventFiber.state == Fiber.State.HOLD) { - // Wake up the primary handler so that it can exit. - primaryEventFiber.call(); + if (primaryEventHandler != null) { + synchronized (primaryEventHandler) { + primaryEventHandler.notify(); + } } - */ + // Shutdown the user I/O thread(s) backend.shutdown(); + + // Close all the windows. This gives them an opportunity to release + // resources. + closeAllWindows(); + } /** * Peek at certain application-level events, add to eventQueue, and wake - * up the consuming Fiber. + * up the consuming Thread. * - * @param events the input events to consume + * @param event the input event to consume */ - private void metaHandleEvents(final List events) { - - for (TInputEvent event: events) { + private void metaHandleEvent(final TInputEvent event) { - /* + if (debugEvents) { System.err.printf(String.format("metaHandleEvents event: %s\n", event)); System.err.flush(); - */ + } + + if (quit) { + // Do no more processing if the application is already trying + // to exit. + return; + } - if (quit) { - // Do no more processing if the application is already trying - // to exit. + // Special application-wide events ------------------------------- + + // Abort everything + if (event instanceof TCommandEvent) { + TCommandEvent command = (TCommandEvent) event; + if (command.getCmd().equals(cmAbort)) { + quit = true; return; } + } - // DEBUG - if (event instanceof TKeypressEvent) { - TKeypressEvent keypress = (TKeypressEvent) event; - if (keypress.equals(kbAltX)) { - quit = true; - return; - } + // Screen resize + if (event instanceof TResizeEvent) { + TResizeEvent resize = (TResizeEvent) event; + getScreen().setDimensions(resize.getWidth(), + resize.getHeight()); + desktopBottom = getScreen().getHeight() - 1; + repaint = true; + mouseX = 0; + mouseY = 0; + return; + } + + // Peek at the mouse position + if (event instanceof TMouseEvent) { + TMouseEvent mouse = (TMouseEvent) event; + if ((mouseX != mouse.getX()) || (mouseY != mouse.getY())) { + mouseX = mouse.getX(); + mouseY = mouse.getY(); + drawMouse(); } - // DEBUG + } - // Special application-wide events ------------------------------- + // Put into the main queue + synchronized (drainEventQueue) { + drainEventQueue.add(event); + } + } - // Abort everything - if (event instanceof TCommandEvent) { - TCommandEvent command = (TCommandEvent) event; - if (command.getCmd().equals(cmAbort)) { - quit = true; - return; - } - } + /** + * Dispatch one event to the appropriate widget or application-level + * event handler. This is the primary event handler, it has the normal + * application-wide event handling. + * + * @param event the input event to consume + * @see #secondaryHandleEvent(TInputEvent event) + */ + private void primaryHandleEvent(final TInputEvent event) { - // Screen resize - if (event instanceof TResizeEvent) { - TResizeEvent resize = (TResizeEvent) event; - backend.getScreen().setDimensions(resize.getWidth(), - resize.getHeight()); - desktopBottom = backend.getScreen().getHeight() - 1; - repaint = true; - mouseX = 0; - mouseY = 0; - continue; - } + if (debugEvents) { + System.err.printf("Handle event: %s\n", event); + } + + // Special application-wide events ----------------------------------- + + // Peek at the mouse position + if (event instanceof TMouseEvent) { + // See if we need to switch focus to another window or the menu + checkSwitchFocus((TMouseEvent) event); + } + + // Handle menu events + if ((activeMenu != null) && !(event instanceof TCommandEvent)) { + TMenu menu = activeMenu; - // Peek at the mouse position if (event instanceof TMouseEvent) { TMouseEvent mouse = (TMouseEvent) event; - if ((mouseX != mouse.getX()) || (mouseY != mouse.getY())) { - mouseX = mouse.getX(); - mouseY = mouse.getY(); - drawMouse(); + + while (subMenus.size() > 0) { + TMenu subMenu = subMenus.get(subMenus.size() - 1); + if (subMenu.mouseWouldHit(mouse)) { + break; + } + if ((mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) + && (!mouse.getMouse1()) + && (!mouse.getMouse2()) + && (!mouse.getMouse3()) + && (!mouse.getMouseWheelUp()) + && (!mouse.getMouseWheelDown()) + ) { + break; + } + // We navigated away from a sub-menu, so close it + closeSubMenu(); + } + + // Convert the mouse relative x/y to menu coordinates + assert (mouse.getX() == mouse.getAbsoluteX()); + assert (mouse.getY() == mouse.getAbsoluteY()); + if (subMenus.size() > 0) { + menu = subMenus.get(subMenus.size() - 1); } + mouse.setX(mouse.getX() - menu.getX()); + mouse.setY(mouse.getY() - menu.getY()); } + menu.handleEvent(event); + return; + } - /* + if (event instanceof TKeypressEvent) { + TKeypressEvent keypress = (TKeypressEvent) event; - // Put into the main queue - addEvent(event); + // See if this key matches an accelerator, and if so dispatch the + // menu event. + TKeypress keypressLowercase = keypress.getKey().toLowerCase(); + TMenuItem item = null; + synchronized (accelerators) { + item = accelerators.get(keypressLowercase); + } + if (item != null) { + // Let the menu item dispatch + item.dispatch(); + return; + } else { + // Handle the keypress + if (onKeypress(keypress)) { + return; + } + } + } - // Have one of the two consumer Fibers peel the events off - // the queue. - if (secondaryEventFiber !is null) { - assert(secondaryEventFiber.state == Fiber.State.HOLD); + if (event instanceof TCommandEvent) { + if (onCommand((TCommandEvent) event)) { + return; + } + } - // Wake up the secondary handler for these events - secondaryEventFiber.call(); - } else { - assert(primaryEventFiber.state == Fiber.State.HOLD); + if (event instanceof TMenuEvent) { + if (onMenu((TMenuEvent) event)) { + return; + } + } - // Wake up the primary handler for these events - primaryEventFiber.call(); + // Dispatch events to the active window ------------------------------- + for (TWindow window: windows) { + if (window.getActive()) { + if (event instanceof TMouseEvent) { + TMouseEvent mouse = (TMouseEvent) event; + // Convert the mouse relative x/y to window coordinates + assert (mouse.getX() == mouse.getAbsoluteX()); + assert (mouse.getY() == mouse.getAbsoluteY()); + mouse.setX(mouse.getX() - window.getX()); + mouse.setY(mouse.getY() - window.getY()); + } + if (debugEvents) { + System.err.printf("TApplication dispatch event: %s\n", + event); + } + window.handleEvent(event); + break; } - */ + } + } + /** + * Dispatch one event to the appropriate widget or application-level + * event handler. This is the secondary event handler used by certain + * special dialogs (currently TMessageBox and TFileOpenBox). + * + * @param event the input event to consume + * @see #primaryHandleEvent(TInputEvent event) + */ + private void secondaryHandleEvent(final TInputEvent event) { + 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(); - } // for (TInputEvent event: events) + // Refresh + repaint = true; + } + /** + * Yield to the secondary thread. + */ + 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 == true); + + // System.err.printf("YIELD\n"); + + while (secondaryEventReceiver != null) { + synchronized (primaryEventHandler) { + try { + primaryEventHandler.wait(); + } catch (InterruptedException e) { + // SQUASH + } + } + } + + // System.err.printf("EXIT YIELD\n"); } /** * Do stuff when there is no user input. */ private void doIdle() { - /* + if (debugThreads) { + System.err.printf("doIdle()\n"); + } + // Now run any timers that have timed out - auto now = Clock.currTime; - TTimer [] keepTimers; - foreach (t; timers) { - if (t.nextTick < now) { - t.tick(); - if (t.recurring == true) { - keepTimers ~= t; + Date now = new Date(); + List keepTimers = new LinkedList(); + for (TTimer timer: timers) { + if (timer.getNextTick().getTime() <= now.getTime()) { + timer.tick(); + if (timer.recurring) { + keepTimers.add(timer); } } else { - keepTimers ~= t; + keepTimers.add(timer); } } timers = keepTimers; // Call onIdle's - foreach (w; windows) { - w.onIdle(); + for (TWindow window: windows) { + window.onIdle(); } - */ } /** * Get the amount of time I can sleep before missing a Timer tick. * - * @param timeout = initial (maximum) timeout + * @param timeout = initial (maximum) timeout in millis * @return number of milliseconds between now and the next timer event */ - protected int getSleepTime(final int timeout) { - /* - auto now = Clock.currTime; - auto sleepTime = dur!("msecs")(timeout); - foreach (t; timers) { - if (t.nextTick < now) { + protected long getSleepTime(final long timeout) { + 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; } - if ((t.nextTick > now) && - ((t.nextTick - now) < sleepTime) - ) { - sleepTime = t.nextTick - now; + + long timeDifference = nextTickTime - nowTime; + if (timeDifference < sleepTime) { + sleepTime = timeDifference; } } - assert(sleepTime.total!("msecs")() >= 0); - return cast(uint)sleepTime.total!("msecs")(); - */ - // TODO: fix timers. Until then, come back after 250 millis. - return 250; + assert (sleepTime >= 0); + assert (sleepTime <= timeout); + return sleepTime; } /** @@ -492,23 +1019,22 @@ public class TApplication { * @param window the window to remove */ public final void closeWindow(final TWindow window) { - /* - TODO - - uint z = window.z; - window.z = -1; - windows.sort; - windows = windows[1 .. $]; - TWindow activeWindow = null; - foreach (w; windows) { - if (w.z > z) { - w.z--; - if (w.z == 0) { - w.active = true; - assert(activeWindow is null); - activeWindow = w; - } else { - w.active = false; + synchronized (windows) { + int z = window.getZ(); + window.setZ(-1); + Collections.sort(windows); + windows.remove(0); + TWindow activeWindow = null; + for (TWindow w: windows) { + if (w.getZ() > z) { + w.setZ(w.getZ() - 1); + if (w.getZ() == 0) { + w.setActive(true); + assert (activeWindow == null); + activeWindow = w; + } else { + w.setActive(false); + } } } } @@ -520,27 +1046,19 @@ public class TApplication { repaint = true; // 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 the secondary thread, it will wake the primary as it + // exits. + synchronized (secondaryEventHandler) { + secondaryEventHandler.notify(); } } - */ } /** @@ -550,48 +1068,47 @@ public class TApplication { * otherwise switch to the previous window in the list */ public final void switchWindow(final boolean forward) { - /* - TODO - // Only switch if there are multiple windows - if (windows.length < 2) { + if (windows.size() < 2) { return; } - // Swap z/active between active window and the next in the - // list - ptrdiff_t activeWindowI = -1; - for (auto i = 0; i < windows.length; i++) { - if (windows[i].active) { - activeWindowI = i; - break; + synchronized (windows) { + + // Swap z/active between active window and the next in the list + int activeWindowI = -1; + for (int i = 0; i < windows.size(); i++) { + if (windows.get(i).getActive()) { + activeWindowI = i; + break; + } } - } - assert(activeWindowI >= 0); + assert (activeWindowI >= 0); - // Do not switch if a window is modal - if (windows[activeWindowI].isModal()) { - return; - } + // Do not switch if a window is modal + if (windows.get(activeWindowI).isModal()) { + return; + } - size_t nextWindowI; - if (forward) { - nextWindowI = (activeWindowI + 1) % windows.length; - } else { - if (activeWindowI == 0) { - nextWindowI = windows.length - 1; + int nextWindowI; + if (forward) { + nextWindowI = (activeWindowI + 1) % windows.size(); } else { - nextWindowI = activeWindowI - 1; + if (activeWindowI == 0) { + nextWindowI = windows.size() - 1; + } else { + nextWindowI = activeWindowI - 1; + } } - } - windows[activeWindowI].active = false; - windows[activeWindowI].z = windows[nextWindowI].z; - windows[nextWindowI].z = 0; - windows[nextWindowI].active = true; + windows.get(activeWindowI).setActive(false); + windows.get(activeWindowI).setZ(windows.get(nextWindowI).getZ()); + windows.get(nextWindowI).setZ(0); + windows.get(nextWindowI).setActive(true); + + } // synchronized (windows) // Refresh repaint = true; - */ } /** @@ -600,21 +1117,681 @@ public class TApplication { * @param window new window to add */ public final void addWindow(final TWindow window) { - /* - TODO - // Do not allow a modal window to spawn a non-modal window - if ((windows.length > 0) && (windows[0].isModal())) { - assert(window.isModal()); - } - foreach (w; windows) { - w.active = false; - w.z++; - } - windows ~= window; - window.active = true; - window.z = 0; - */ + synchronized (windows) { + // Do not allow a modal window to spawn a non-modal window + if ((windows.size() > 0) && (windows.get(0).isModal())) { + assert (window.isModal()); + } + for (TWindow w: windows) { + w.setActive(false); + w.setZ(w.getZ() + 1); + } + windows.add(window); + window.setActive(true); + window.setZ(0); + } + } + + /** + * Check if there is a system-modal window on top. + * + * @return true if the active window is modal + */ + private boolean modalWindowActive() { + if (windows.size() == 0) { + return false; + } + return windows.get(windows.size() - 1).isModal(); + } + + /** + * Check if a mouse event would hit either the active menu or any open + * sub-menus. + * + * @param mouse mouse event + * @return true if the mouse would hit the active menu or an open + * sub-menu + */ + private boolean mouseOnMenu(final TMouseEvent mouse) { + assert (activeMenu != null); + List menus = new LinkedList(subMenus); + Collections.reverse(menus); + for (TMenu menu: menus) { + if (menu.mouseWouldHit(mouse)) { + return true; + } + } + return activeMenu.mouseWouldHit(mouse); + } + + /** + * See if we need to switch window or activate the menu based on + * a mouse click. + * + * @param mouse mouse event + */ + private void checkSwitchFocus(final TMouseEvent mouse) { + + if ((mouse.getType() == TMouseEvent.Type.MOUSE_DOWN) + && (activeMenu != null) + && (mouse.getAbsoluteY() != 0) + && (!mouseOnMenu(mouse)) + ) { + // They clicked outside the active menu, turn it off + activeMenu.setActive(false); + activeMenu = null; + for (TMenu menu: subMenus) { + menu.setActive(false); + } + subMenus.clear(); + // Continue checks + } + + // See if they hit the menu bar + if ((mouse.getType() == TMouseEvent.Type.MOUSE_DOWN) + && (mouse.getMouse1()) + && (!modalWindowActive()) + && (mouse.getAbsoluteY() == 0) + ) { + + for (TMenu menu: subMenus) { + menu.setActive(false); + } + subMenus.clear(); + + // They selected the menu, go activate it + for (TMenu menu: menus) { + if ((mouse.getAbsoluteX() >= menu.getX()) + && (mouse.getAbsoluteX() < menu.getX() + + menu.getTitle().length() + 2) + ) { + menu.setActive(true); + activeMenu = menu; + } else { + menu.setActive(false); + } + } + repaint = true; + return; + } + + // See if they hit the menu bar + if ((mouse.getType() == TMouseEvent.Type.MOUSE_MOTION) + && (mouse.getMouse1()) + && (activeMenu != null) + && (mouse.getAbsoluteY() == 0) + ) { + + TMenu oldMenu = activeMenu; + for (TMenu menu: subMenus) { + menu.setActive(false); + } + subMenus.clear(); + + // See if we should switch menus + for (TMenu menu: menus) { + if ((mouse.getAbsoluteX() >= menu.getX()) + && (mouse.getAbsoluteX() < menu.getX() + + menu.getTitle().length() + 2) + ) { + menu.setActive(true); + activeMenu = menu; + } + } + if (oldMenu != activeMenu) { + // They switched menus + oldMenu.setActive(false); + } + repaint = true; + return; + } + + // Only switch if there are multiple windows + if (windows.size() < 2) { + return; + } + + // Switch on the upclick + if (mouse.getType() != TMouseEvent.Type.MOUSE_UP) { + return; + } + + synchronized (windows) { + Collections.sort(windows); + if (windows.get(0).isModal()) { + // Modal windows don't switch + return; + } + + for (TWindow window: windows) { + assert (!window.isModal()); + if (window.mouseWouldHit(mouse)) { + if (window == windows.get(0)) { + // Clicked on the same window, nothing to do + return; + } + + // We will be switching to another window + assert (windows.get(0).getActive()); + assert (!window.getActive()); + windows.get(0).setActive(false); + windows.get(0).setZ(window.getZ()); + window.setZ(0); + window.setActive(true); + repaint = true; + return; + } + } + } + + // Clicked on the background, nothing to do + return; + } + + /** + * Turn off the menu. + */ + public final void closeMenu() { + if (activeMenu != null) { + activeMenu.setActive(false); + activeMenu = null; + for (TMenu menu: subMenus) { + menu.setActive(false); + } + subMenus.clear(); + } + repaint = true; + } + + /** + * Turn off a sub-menu. + */ + public final void closeSubMenu() { + assert (activeMenu != null); + TMenu item = subMenus.get(subMenus.size() - 1); + assert (item != null); + item.setActive(false); + subMenus.remove(subMenus.size() - 1); + repaint = true; + } + + /** + * Switch to the next menu. + * + * @param forward if true, then switch to the next menu in the list, + * otherwise switch to the previous menu in the list + */ + public final void switchMenu(final boolean forward) { + assert (activeMenu != null); + + for (TMenu menu: subMenus) { + menu.setActive(false); + } + subMenus.clear(); + + for (int i = 0; i < menus.size(); i++) { + if (activeMenu == menus.get(i)) { + if (forward) { + if (i < menus.size() - 1) { + i++; + } + } else { + if (i > 0) { + i--; + } + } + activeMenu.setActive(false); + activeMenu = menus.get(i); + activeMenu.setActive(true); + repaint = true; + return; + } + } } + /** + * Method that TApplication subclasses can override to handle menu or + * posted command events. + * + * @param command command event + * @return if true, this event was consumed + */ + protected boolean onCommand(final TCommandEvent command) { + // Default: handle cmExit + if (command.equals(cmExit)) { + if (messageBox("Confirmation", "Exit application?", + TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) { + quit = true; + } + repaint = true; + return true; + } + + if (command.equals(cmShell)) { + openTerminal(0, 0, TWindow.RESIZABLE); + repaint = true; + return true; + } + + if (command.equals(cmTile)) { + tileWindows(); + repaint = true; + return true; + } + if (command.equals(cmCascade)) { + cascadeWindows(); + repaint = true; + return true; + } + if (command.equals(cmCloseAll)) { + closeAllWindows(); + repaint = true; + return true; + } + + return false; + } + + /** + * Method that TApplication subclasses can override to handle menu + * events. + * + * @param menu menu event + * @return if true, this event was consumed + */ + protected boolean onMenu(final TMenuEvent menu) { + + // Default: handle MID_EXIT + if (menu.getId() == TMenu.MID_EXIT) { + if (messageBox("Confirmation", "Exit application?", + TMessageBox.Type.YESNO).getResult() == TMessageBox.Result.YES) { + quit = true; + } + // System.err.printf("onMenu MID_EXIT result: quit = %s\n", quit); + repaint = true; + return true; + } + + if (menu.getId() == TMenu.MID_SHELL) { + openTerminal(0, 0, TWindow.RESIZABLE); + repaint = true; + return true; + } + + if (menu.getId() == TMenu.MID_TILE) { + tileWindows(); + repaint = true; + return true; + } + if (menu.getId() == TMenu.MID_CASCADE) { + cascadeWindows(); + repaint = true; + return true; + } + if (menu.getId() == TMenu.MID_CLOSE_ALL) { + closeAllWindows(); + repaint = true; + return true; + } + return false; + } + + /** + * Method that TApplication subclasses can override to handle keystrokes. + * + * @param keypress keystroke event + * @return if true, this event was consumed + */ + protected boolean onKeypress(final TKeypressEvent keypress) { + // Default: only menu shortcuts + + // Process Alt-F, Alt-E, etc. menu shortcut keys + if (!keypress.getKey().getIsKey() + && keypress.getKey().getAlt() + && !keypress.getKey().getCtrl() + && (activeMenu == null) + ) { + + assert (subMenus.size() == 0); + + for (TMenu menu: menus) { + if (Character.toLowerCase(menu.getMnemonic().getShortcut()) + == Character.toLowerCase(keypress.getKey().getCh()) + ) { + activeMenu = menu; + menu.setActive(true); + repaint = true; + return true; + } + } + } + + return false; + } + + /** + * Add a keyboard accelerator to the global hash. + * + * @param item menu item this accelerator relates to + * @param keypress keypress that will dispatch a TMenuEvent + */ + public final void addAccelerator(final TMenuItem item, + final TKeypress keypress) { + + // System.err.printf("addAccelerator: key %s item %s\n", keypress, item); + + synchronized (accelerators) { + assert (accelerators.get(keypress) == null); + accelerators.put(keypress, item); + } + } + + /** + * Recompute menu x positions based on their title length. + */ + public final void recomputeMenuX() { + int x = 0; + for (TMenu menu: menus) { + menu.setX(x); + x += menu.getTitle().length() + 2; + } + } + + /** + * Post an event to process and turn off the menu. + * + * @param event new event to add to the queue + */ + public final void addMenuEvent(final TInputEvent event) { + synchronized (fillEventQueue) { + fillEventQueue.add(event); + } + closeMenu(); + } + + /** + * Add a sub-menu to the list of open sub-menus. + * + * @param menu sub-menu + */ + public final void addSubMenu(final TMenu menu) { + subMenus.add(menu); + } + + /** + * Convenience function to add a top-level menu. + * + * @param title menu title + * @return the new menu + */ + public final TMenu addMenu(final String title) { + int x = 0; + int y = 0; + TMenu menu = new TMenu(this, x, y, title); + menus.add(menu); + recomputeMenuX(); + return menu; + } + + /** + * Convenience function to add a default "File" menu. + * + * @return the new menu + */ + public final TMenu addFileMenu() { + TMenu fileMenu = addMenu("&File"); + fileMenu.addDefaultItem(TMenu.MID_OPEN_FILE); + fileMenu.addSeparator(); + fileMenu.addDefaultItem(TMenu.MID_SHELL); + fileMenu.addDefaultItem(TMenu.MID_EXIT); + return fileMenu; + } + + /** + * Convenience function to add a default "Edit" menu. + * + * @return the new menu + */ + public final TMenu addEditMenu() { + TMenu editMenu = addMenu("&Edit"); + editMenu.addDefaultItem(TMenu.MID_CUT); + editMenu.addDefaultItem(TMenu.MID_COPY); + editMenu.addDefaultItem(TMenu.MID_PASTE); + editMenu.addDefaultItem(TMenu.MID_CLEAR); + return editMenu; + } + + /** + * Convenience function to add a default "Window" menu. + * + * @return the new menu + */ + public final TMenu addWindowMenu() { + TMenu windowMenu = addMenu("&Window"); + windowMenu.addDefaultItem(TMenu.MID_TILE); + windowMenu.addDefaultItem(TMenu.MID_CASCADE); + windowMenu.addDefaultItem(TMenu.MID_CLOSE_ALL); + windowMenu.addSeparator(); + windowMenu.addDefaultItem(TMenu.MID_WINDOW_MOVE); + windowMenu.addDefaultItem(TMenu.MID_WINDOW_ZOOM); + windowMenu.addDefaultItem(TMenu.MID_WINDOW_NEXT); + windowMenu.addDefaultItem(TMenu.MID_WINDOW_PREVIOUS); + windowMenu.addDefaultItem(TMenu.MID_WINDOW_CLOSE); + return windowMenu; + } + + /** + * Close all open windows. + */ + private void closeAllWindows() { + // Don't do anything if we are in the menu + if (activeMenu != null) { + return; + } + + synchronized (windows) { + for (TWindow window: windows) { + closeWindow(window); + } + } + } + + /** + * Re-layout the open windows as non-overlapping tiles. This produces + * almost the same results as Turbo Pascal 7.0's IDE. + */ + private void tileWindows() { + synchronized (windows) { + // Don't do anything if we are in the menu + if (activeMenu != null) { + return; + } + int z = windows.size(); + if (z == 0) { + return; + } + int a = 0; + int b = 0; + a = (int)(Math.sqrt(z)); + int c = 0; + while (c < a) { + b = (z - c) / a; + if (((a * b) + c) == z) { + break; + } + c++; + } + assert (a > 0); + assert (b > 0); + assert (c < a); + int newWidth = (getScreen().getWidth() / a); + int newHeight1 = ((getScreen().getHeight() - 1) / b); + int newHeight2 = ((getScreen().getHeight() - 1) / (b + c)); + + List sorted = new LinkedList(windows); + Collections.sort(sorted); + Collections.reverse(sorted); + for (int i = 0; i < sorted.size(); i++) { + int logicalX = i / b; + int logicalY = i % b; + if (i >= ((a - 1) * b)) { + logicalX = a - 1; + logicalY = i - ((a - 1) * b); + } + + TWindow w = sorted.get(i); + w.setX(logicalX * newWidth); + w.setWidth(newWidth); + if (i >= ((a - 1) * b)) { + w.setY((logicalY * newHeight2) + 1); + w.setHeight(newHeight2); + } else { + w.setY((logicalY * newHeight1) + 1); + w.setHeight(newHeight1); + } + } + } + } + + /** + * Re-layout the open windows as overlapping cascaded windows. + */ + private void cascadeWindows() { + synchronized (windows) { + // Don't do anything if we are in the menu + if (activeMenu != null) { + return; + } + int x = 0; + int y = 1; + List sorted = new LinkedList(windows); + Collections.sort(sorted); + Collections.reverse(sorted); + for (TWindow window: sorted) { + window.setX(x); + window.setY(y); + x++; + y++; + if (x > getScreen().getWidth()) { + x = 0; + } + if (y >= getScreen().getHeight()) { + y = 1; + } + } + } + } + + /** + * Convenience function to add a timer. + * + * @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) { + + TTimer timer = new TTimer(duration, recurring, action); + synchronized (timers) { + timers.add(timer); + } + return timer; + } + + /** + * Convenience function to remove a timer. + * + * @param timer timer to remove + */ + public final void removeTimer(final TTimer timer) { + synchronized (timers) { + timers.remove(timer); + } + } + + /** + * 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); + } + + /** + * Convenience function to open a terminal window. + * + * @param x column relative to parent + * @param y row relative to parent + * @return the terminal new window + */ + public final TTerminalWindow openTerminal(final int x, final int y) { + return openTerminal(x, y, TWindow.RESIZABLE); + } + + /** + * Convenience function to open a terminal window. + * + * @param x column relative to parent + * @param y row relative to parent + * @param flags mask of CENTERED, MODAL, or RESIZABLE + * @return the terminal new window + */ + public final TTerminalWindow openTerminal(final int x, final int y, + final int flags) { + + return new TTerminalWindow(this, x, y, flags); + } }