src/jexer/TWindow.java

   1 /*
   2  * Jexer - Java Text User Interface
   3  *
   4  * The MIT License (MIT)
   5  *
   6  * Copyright (C) 2019 Kevin Lamonte
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * @author Kevin Lamonte [kevin.lamonte@gmail.com]
  27  * @version 1
  28  */
  29 package jexer;
  30
  31 import java.util.HashSet;
  32 import java.util.Set;
  33
  34 import jexer.backend.Screen;
  35 import jexer.bits.Cell;
  36 import jexer.bits.CellAttributes;
  37 import jexer.bits.GraphicsChars;
  38 import jexer.event.TCommandEvent;
  39 import jexer.event.TKeypressEvent;
  40 import jexer.event.TMenuEvent;
  41 import jexer.event.TMouseEvent;
  42 import jexer.event.TResizeEvent;
  43 import jexer.menu.TMenu;
  44 import static jexer.TCommand.*;
  45 import static jexer.TKeypress.*;
  46
  47 /**
  48  * TWindow is the top-level container and drawing surface for other widgets.
  49  */
  50 public class TWindow extends TWidget {
  51
  52     // ------------------------------------------------------------------------
  53     // Constants --------------------------------------------------------------
  54     // ------------------------------------------------------------------------
  55
  56     /**
  57      * Window is resizable (default yes).
  58      */
  59     public static final int RESIZABLE   = 0x01;
  60
  61     /**
  62      * Window is modal (default no).
  63      */
  64     public static final int MODAL       = 0x02;
  65
  66     /**
  67      * Window is centered (default no).
  68      */
  69     public static final int CENTERED    = 0x04;
  70
  71     /**
  72      * Window has no close box (default no).  Window can still be closed via
  73      * TApplication.closeWindow() and TWindow.close().
  74      */
  75     public static final int NOCLOSEBOX  = 0x08;
  76
  77     /**
  78      * Window has no maximize box (default no).
  79      */
  80     public static final int NOZOOMBOX   = 0x10;
  81
  82     /**
  83      * Window is placed at absolute position (no smart placement) (default
  84      * no).
  85      */
  86     public static final int ABSOLUTEXY  = 0x20;
  87
  88     /**
  89      * Hitting the closebox with the mouse calls TApplication.hideWindow()
  90      * rather than TApplication.closeWindow() (default no).
  91      */
  92     public static final int HIDEONCLOSE = 0x40;
  93
  94     /**
  95      * Menus cannot be used when this window is active (default no).
  96      */
  97     public static final int OVERRIDEMENU        = 0x80;
  98
  99     // ------------------------------------------------------------------------
 100     // Variables --------------------------------------------------------------
 101     // ------------------------------------------------------------------------
 102
 103     /**
 104      * Window flags.  Note package private access.
 105      */
 106     int flags = RESIZABLE;
 107
 108     /**
 109      * Window title.
 110      */
 111     private String title = "";
 112
 113     /**
 114      * Window's parent TApplication.
 115      */
 116     private TApplication application;
 117
 118     /**
 119      * Z order.  Lower number means more in-front.
 120      */
 121     private int z = 0;
 122
 123     /**
 124      * Window's keyboard shortcuts.  Any key in this set will be passed to
 125      * the window directly rather than processed through the menu
 126      * accelerators.
 127      */
 128     private Set<TKeypress> keyboardShortcuts = new HashSet<TKeypress>();
 129
 130     /**
 131      * If true, then the user clicked on the title bar and is moving the
 132      * window.
 133      */
 134     protected boolean inWindowMove = false;
 135
 136     /**
 137      * If true, then the user clicked on the bottom right corner and is
 138      * resizing the window.
 139      */
 140     protected boolean inWindowResize = false;
 141
 142     /**
 143      * If true, then the user selected "Size/Move" (or hit Ctrl-F5) and is
 144      * resizing/moving the window via the keyboard.
 145      */
 146     protected boolean inKeyboardResize = false;
 147
 148     /**
 149      * If true, this window is maximized.
 150      */
 151     private boolean maximized = false;
 152
 153     /**
 154      * Remember mouse state.
 155      */
 156     protected TMouseEvent mouse;
 157
 158     // For moving the window.  resizing also uses moveWindowMouseX/Y
 159     private int moveWindowMouseX;
 160     private int moveWindowMouseY;
 161     private int oldWindowX;
 162     private int oldWindowY;
 163
 164     // Resizing
 165     private int resizeWindowWidth;
 166     private int resizeWindowHeight;
 167     private int minimumWindowWidth = 10;
 168     private int minimumWindowHeight = 2;
 169     private int maximumWindowWidth = -1;
 170     private int maximumWindowHeight = -1;
 171
 172     // For maximize/restore
 173     private int restoreWindowWidth;
 174     private int restoreWindowHeight;
 175     private int restoreWindowX;
 176     private int restoreWindowY;
 177
 178     /**
 179      * Hidden flag.  A hidden window will still have its onIdle() called, and
 180      * will also have onClose() called at application exit.  Note package
 181      * private access: TApplication will force hidden false if a modal window
 182      * is active.
 183      */
 184     boolean hidden = false;
 185
 186     /**
 187      * A window may have a status bar associated with it.  TApplication will
 188      * draw this status bar last, and will also route events to it first
 189      * before the window.
 190      */
 191     protected TStatusBar statusBar = null;
 192
 193     /**
 194      * A window may request that TApplication NOT draw the mouse cursor over
 195      * it by setting this to true.  This is currently only used within Jexer
 196      * by TTerminalWindow so that only the bottom-most instance of nested
 197      * Jexer's draws the mouse within its application window.  But perhaps
 198      * other applications can use it, so public getter/setter is provided.
 199      */
 200     private boolean hideMouse = false;
 201
 202     // ------------------------------------------------------------------------
 203     // Constructors -----------------------------------------------------------
 204     // ------------------------------------------------------------------------
 205
 206     /**
 207      * Public constructor.  Window will be located at (0, 0).
 208      *
 209      * @param application TApplication that manages this window
 210      * @param title window title, will be centered along the top border
 211      * @param width width of window
 212      * @param height height of window
 213      */
 214     public TWindow(final TApplication application, final String title,
 215         final int width, final int height) {
 216
 217         this(application, title, 0, 0, width, height, RESIZABLE);
 218     }
 219
 220     /**
 221      * Public constructor.  Window will be located at (0, 0).
 222      *
 223      * @param application TApplication that manages this window
 224      * @param title window title, will be centered along the top border
 225      * @param width width of window
 226      * @param height height of window
 227      * @param flags bitmask of RESIZABLE, CENTERED, or MODAL
 228      */
 229     public TWindow(final TApplication application, final String title,
 230         final int width, final int height, final int flags) {
 231
 232         this(application, title, 0, 0, width, height, flags);
 233     }
 234
 235     /**
 236      * Public constructor.
 237      *
 238      * @param application TApplication that manages this window
 239      * @param title window title, will be centered along the top border
 240      * @param x column relative to parent
 241      * @param y row relative to parent
 242      * @param width width of window
 243      * @param height height of window
 244      */
 245     public TWindow(final TApplication application, final String title,
 246         final int x, final int y, final int width, final int height) {
 247
 248         this(application, title, x, y, width, height, RESIZABLE);
 249     }
 250
 251     /**
 252      * Public constructor.
 253      *
 254      * @param application TApplication that manages this window
 255      * @param title window title, will be centered along the top border
 256      * @param x column relative to parent
 257      * @param y row relative to parent
 258      * @param width width of window
 259      * @param height height of window
 260      * @param flags mask of RESIZABLE, CENTERED, or MODAL
 261      */
 262     public TWindow(final TApplication application, final String title,
 263         final int x, final int y, final int width, final int height,
 264         final int flags) {
 265
 266         super();
 267
 268         // I am my own window and parent
 269         setupForTWindow(this, x, y + application.getDesktopTop(),
 270             width, height);
 271
 272         // Save fields
 273         this.title       = title;
 274         this.application = application;
 275         this.flags       = flags;
 276
 277         // Minimum width/height are 10 and 2
 278         assert (width >= 10);
 279         assert (getHeight() >= 2);
 280
 281         // MODAL implies CENTERED
 282         if (isModal()) {
 283             this.flags |= CENTERED;
 284         }
 285
 286         // Center window if specified
 287         center();
 288
 289         // Add me to the application
 290         application.addWindowToApplication(this);
 291     }
 292
 293     // ------------------------------------------------------------------------
 294     // Event handlers ---------------------------------------------------------
 295     // ------------------------------------------------------------------------
 296
 297     /**
 298      * Returns true if the mouse is currently on the close button.
 299      *
 300      * @return true if mouse is currently on the close button
 301      */
 302     protected boolean mouseOnClose() {
 303         if ((flags & NOCLOSEBOX) != 0) {
 304             return false;
 305         }
 306         if ((mouse != null)
 307             && (mouse.getAbsoluteY() == getY())
 308             && (mouse.getAbsoluteX() == getX() + 3)
 309         ) {
 310             return true;
 311         }
 312         return false;
 313     }
 314
 315     /**
 316      * Returns true if the mouse is currently on the maximize/restore button.
 317      *
 318      * @return true if the mouse is currently on the maximize/restore button
 319      */
 320     protected boolean mouseOnMaximize() {
 321         if ((flags & NOZOOMBOX) != 0) {
 322             return false;
 323         }
 324         if ((mouse != null)
 325             && !isModal()
 326             && (mouse.getAbsoluteY() == getY())
 327             && (mouse.getAbsoluteX() == getX() + getWidth() - 4)
 328         ) {
 329             return true;
 330         }
 331         return false;
 332     }
 333
 334     /**
 335      * Returns true if the mouse is currently on the resizable lower right
 336      * corner.
 337      *
 338      * @return true if the mouse is currently on the resizable lower right
 339      * corner
 340      */
 341     protected boolean mouseOnResize() {
 342         if (((flags & RESIZABLE) != 0)
 343             && !isModal()
 344             && (mouse != null)
 345             && (mouse.getAbsoluteY() == getY() + getHeight() - 1)
 346             && ((mouse.getAbsoluteX() == getX() + getWidth() - 1)
 347                 || (mouse.getAbsoluteX() == getX() + getWidth() - 2))
 348         ) {
 349             return true;
 350         }
 351         return false;
 352     }
 353
 354     /**
 355      * Subclasses should override this method to perform any user prompting
 356      * before they are offscreen.  Note that unlike other windowing toolkits,
 357      * windows can NOT use this function in some manner to avoid being
 358      * closed.  This is called by application.closeWindow().
 359      */
 360     protected void onPreClose() {
 361         // Default: do nothing.
 362     }
 363
 364     /**
 365      * Subclasses should override this method to cleanup resources.  This is
 366      * called by application.closeWindow().
 367      */
 368     protected void onClose() {
 369         // Default: perform widget-specific cleanup.
 370         for (TWidget w: getChildren()) {
 371             w.close();
 372         }
 373     }
 374
 375     /**
 376      * Called by application.switchWindow() when this window gets the
 377      * focus, and also by application.addWindow().
 378      */
 379     protected void onFocus() {
 380         // Default: do nothing
 381     }
 382
 383     /**
 384      * Called by application.switchWindow() when another window gets the
 385      * focus.
 386      */
 387     protected void onUnfocus() {
 388         // Default: do nothing
 389     }
 390
 391     /**
 392      * Called by application.hideWindow().
 393      */
 394     protected void onHide() {
 395         // Default: do nothing
 396     }
 397
 398     /**
 399      * Called by application.showWindow().
 400      */
 401     protected void onShow() {
 402         // Default: do nothing
 403     }
 404
 405     /**
 406      * Handle mouse button presses.
 407      *
 408      * @param mouse mouse button event
 409      */
 410     @Override
 411     public void onMouseDown(final TMouseEvent mouse) {
 412         this.mouse = mouse;
 413
 414         inKeyboardResize = false;
 415         inWindowMove = false;
 416         inWindowResize = false;
 417
 418         if ((mouse.getAbsoluteY() == getY())
 419             && mouse.isMouse1()
 420             && (getX() <= mouse.getAbsoluteX())
 421             && (mouse.getAbsoluteX() < getX() + getWidth())
 422             && !mouseOnClose()
 423             && !mouseOnMaximize()
 424         ) {
 425             // Begin moving window
 426             inWindowMove = true;
 427             moveWindowMouseX = mouse.getAbsoluteX();
 428             moveWindowMouseY = mouse.getAbsoluteY();
 429             oldWindowX = getX();
 430             oldWindowY = getY();
 431             if (maximized) {
 432                 maximized = false;
 433             }
 434             return;
 435         }
 436         if (mouseOnResize()) {
 437             // Begin window resize
 438             inWindowResize = true;
 439             moveWindowMouseX = mouse.getAbsoluteX();
 440             moveWindowMouseY = mouse.getAbsoluteY();
 441             resizeWindowWidth = getWidth();
 442             resizeWindowHeight = getHeight();
 443             if (maximized) {
 444                 maximized = false;
 445             }
 446             return;
 447         }
 448
 449         // Give the shortcut bar a shot at this.
 450         if (statusBar != null) {
 451             if (statusBar.statusBarMouseDown(mouse)) {
 452                 return;
 453             }
 454         }
 455
 456         // I didn't take it, pass it on to my children
 457         super.onMouseDown(mouse);
 458     }
 459
 460     /**
 461      * Handle mouse button releases.
 462      *
 463      * @param mouse mouse button release event
 464      */
 465     @Override
 466     public void onMouseUp(final TMouseEvent mouse) {
 467         this.mouse = mouse;
 468
 469         if ((inWindowMove) && (mouse.isMouse1())) {
 470             // Stop moving window
 471             inWindowMove = false;
 472             return;
 473         }
 474
 475         if ((inWindowResize) && (mouse.isMouse1())) {
 476             // Stop resizing window
 477             inWindowResize = false;
 478             return;
 479         }
 480
 481         if (mouse.isMouse1() && mouseOnClose()) {
 482             if ((flags & HIDEONCLOSE) == 0) {
 483                 // Close window
 484                 application.closeWindow(this);
 485             } else {
 486                 // Hide window
 487                 application.hideWindow(this);
 488             }
 489             return;
 490         }
 491
 492         if ((mouse.getAbsoluteY() == getY())
 493             && mouse.isMouse1()
 494             && mouseOnMaximize()) {
 495             if (maximized) {
 496                 // Restore
 497                 restore();
 498             } else {
 499                 // Maximize
 500                 maximize();
 501             }
 502             // Pass a resize event to my children
 503             onResize(new TResizeEvent(TResizeEvent.Type.WIDGET,
 504                     getWidth(), getHeight()));
 505             return;
 506         }
 507
 508         // Give the shortcut bar a shot at this.
 509         if (statusBar != null) {
 510             if (statusBar.statusBarMouseUp(mouse)) {
 511                 return;
 512             }
 513         }
 514
 515         // I didn't take it, pass it on to my children
 516         super.onMouseUp(mouse);
 517     }
 518
 519     /**
 520      * Handle mouse movements.
 521      *
 522      * @param mouse mouse motion event
 523      */
 524     @Override
 525     public void onMouseMotion(final TMouseEvent mouse) {
 526         this.mouse = mouse;
 527
 528         if (inWindowMove) {
 529             // Move window over
 530             setX(oldWindowX + (mouse.getAbsoluteX() - moveWindowMouseX));
 531             setY(oldWindowY + (mouse.getAbsoluteY() - moveWindowMouseY));
 532             // Don't cover up the menu bar
 533             if (getY() < application.getDesktopTop()) {
 534                 setY(application.getDesktopTop());
 535             }
 536             // Don't go below the status bar
 537             if (getY() >= application.getDesktopBottom()) {
 538                 setY(application.getDesktopBottom() - 1);
 539             }
 540             return;
 541         }
 542
 543         if (inWindowResize) {
 544             // Do not permit resizing below the status line
 545             if (mouse.getAbsoluteY() == application.getDesktopBottom()) {
 546                 inWindowResize = false;
 547                 return;
 548             }
 549
 550             // Move window over
 551             setWidth(resizeWindowWidth + (mouse.getAbsoluteX()
 552                     - moveWindowMouseX));
 553             setHeight(resizeWindowHeight + (mouse.getAbsoluteY()
 554                     - moveWindowMouseY));
 555             if (getX() + getWidth() > getScreen().getWidth()) {
 556                 setWidth(getScreen().getWidth() - getX());
 557             }
 558             if (getY() + getHeight() > application.getDesktopBottom()) {
 559                 setY(application.getDesktopBottom() - getHeight() + 1);
 560             }
 561             // Don't cover up the menu bar
 562             if (getY() < application.getDesktopTop()) {
 563                 setY(application.getDesktopTop());
 564             }
 565
 566             // Keep within min/max bounds
 567             if (getWidth() < minimumWindowWidth) {
 568                 setWidth(minimumWindowWidth);
 569                 inWindowResize = false;
 570             }
 571             if (getHeight() < minimumWindowHeight) {
 572                 setHeight(minimumWindowHeight);
 573                 inWindowResize = false;
 574             }
 575             if ((maximumWindowWidth > 0)
 576                 && (getWidth() > maximumWindowWidth)
 577             ) {
 578                 setWidth(maximumWindowWidth);
 579                 inWindowResize = false;
 580             }
 581             if ((maximumWindowHeight > 0)
 582                 && (getHeight() > maximumWindowHeight)
 583             ) {
 584                 setHeight(maximumWindowHeight);
 585                 inWindowResize = false;
 586             }
 587
 588             // Pass a resize event to my children
 589             onResize(new TResizeEvent(TResizeEvent.Type.WIDGET,
 590                     getWidth(), getHeight()));
 591             return;
 592         }
 593
 594         // Give the shortcut bar a shot at this.
 595         if (statusBar != null) {
 596             statusBar.statusBarMouseMotion(mouse);
 597         }
 598
 599         // I didn't take it, pass it on to my children
 600         super.onMouseMotion(mouse);
 601     }
 602
 603     /**
 604      * Handle keystrokes.
 605      *
 606      * @param keypress keystroke event
 607      */
 608     @Override
 609     public void onKeypress(final TKeypressEvent keypress) {
 610
 611         if (inKeyboardResize) {
 612
 613             // ESC or ENTER - Exit size/move
 614             if (keypress.equals(kbEsc) || keypress.equals(kbEnter)) {
 615                 inKeyboardResize = false;
 616             }
 617
 618             if (keypress.equals(kbLeft)) {
 619                 if (getX() > 0) {
 620                     setX(getX() - 1);
 621                 }
 622             }
 623             if (keypress.equals(kbRight)) {
 624                 if (getX() < getScreen().getWidth() - 1) {
 625                     setX(getX() + 1);
 626                 }
 627             }
 628             if (keypress.equals(kbDown)) {
 629                 if (getY() < application.getDesktopBottom() - 1) {
 630                     setY(getY() + 1);
 631                 }
 632             }
 633             if (keypress.equals(kbUp)) {
 634                 if (getY() > 1) {
 635                     setY(getY() - 1);
 636                 }
 637             }
 638
 639             /*
 640              * Only permit keyboard resizing if the window was RESIZABLE.
 641              */
 642             if ((flags & RESIZABLE) != 0) {
 643
 644                 if (keypress.equals(kbShiftLeft)) {
 645                     if ((getWidth() > minimumWindowWidth)
 646                         || (minimumWindowWidth <= 0)
 647                     ) {
 648                         setWidth(getWidth() - 1);
 649                     }
 650                 }
 651                 if (keypress.equals(kbShiftRight)) {
 652                     if ((getWidth() < maximumWindowWidth)
 653                         || (maximumWindowWidth <= 0)
 654                     ) {
 655                         setWidth(getWidth() + 1);
 656                     }
 657                 }
 658                 if (keypress.equals(kbShiftUp)) {
 659                     if ((getHeight() > minimumWindowHeight)
 660                         || (minimumWindowHeight <= 0)
 661                     ) {
 662                         setHeight(getHeight() - 1);
 663                     }
 664                 }
 665                 if (keypress.equals(kbShiftDown)) {
 666                     if ((getHeight() < maximumWindowHeight)
 667                         || (maximumWindowHeight <= 0)
 668                     ) {
 669                         setHeight(getHeight() + 1);
 670                     }
 671                 }
 672
 673                 // Pass a resize event to my children
 674                 onResize(new TResizeEvent(TResizeEvent.Type.WIDGET,
 675                         getWidth(), getHeight()));
 676
 677             } // if ((flags & RESIZABLE) != 0)
 678
 679             return;
 680         }
 681
 682         // Give the shortcut bar a shot at this.
 683         if (statusBar != null) {
 684             if (statusBar.statusBarKeypress(keypress)) {
 685                 return;
 686             }
 687         }
 688
 689         // These keystrokes will typically not be seen unless a subclass
 690         // overrides onMenu() due to how TApplication dispatches
 691         // accelerators.
 692
 693         if (!(this instanceof TDesktop)) {
 694
 695             // Ctrl-W - close window
 696             if (keypress.equals(kbCtrlW)) {
 697                 if ((flags & NOCLOSEBOX) == 0) {
 698                     if ((flags & HIDEONCLOSE) == 0) {
 699                         // Close window
 700                         application.closeWindow(this);
 701                     } else {
 702                         // Hide window
 703                         application.hideWindow(this);
 704                     }
 705                 }
 706                 return;
 707             }
 708
 709             // F6 - behave like Alt-TAB
 710             if (keypress.equals(kbF6)) {
 711                 application.switchWindow(true);
 712                 return;
 713             }
 714
 715             // Shift-F6 - behave like Shift-Alt-TAB
 716             if (keypress.equals(kbShiftF6)) {
 717                 application.switchWindow(false);
 718                 return;
 719             }
 720
 721             // F5 - zoom
 722             if (keypress.equals(kbF5) && ((flags & NOZOOMBOX) == 0)) {
 723                 if (maximized) {
 724                     restore();
 725                 } else {
 726                     maximize();
 727                 }
 728             }
 729
 730             // Ctrl-F5 - size/move
 731             if (keypress.equals(kbCtrlF5)) {
 732                 inKeyboardResize = !inKeyboardResize;
 733             }
 734
 735         } // if (!(this instanceof TDesktop))
 736
 737         // I didn't take it, pass it on to my children
 738         super.onKeypress(keypress);
 739     }
 740
 741     /**
 742      * Handle posted command events.
 743      *
 744      * @param command command event
 745      */
 746     @Override
 747     public void onCommand(final TCommandEvent command) {
 748
 749         // These commands will typically not be seen unless a subclass
 750         // overrides onMenu() due to how TApplication dispatches
 751         // accelerators.
 752
 753         if (!(this instanceof TDesktop)) {
 754
 755             if (command.equals(cmWindowClose)) {
 756                 if ((flags & NOCLOSEBOX) == 0) {
 757                     if ((flags & HIDEONCLOSE) == 0) {
 758                         // Close window
 759                         application.closeWindow(this);
 760                     } else {
 761                         // Hide window
 762                         application.hideWindow(this);
 763                     }
 764                 }
 765                 return;
 766             }
 767
 768             if (command.equals(cmWindowNext)) {
 769                 application.switchWindow(true);
 770                 return;
 771             }
 772
 773             if (command.equals(cmWindowPrevious)) {
 774                 application.switchWindow(false);
 775                 return;
 776             }
 777
 778             if (command.equals(cmWindowMove)) {
 779                 inKeyboardResize = true;
 780                 return;
 781             }
 782
 783             if (command.equals(cmWindowZoom) && ((flags & NOZOOMBOX) == 0)) {
 784                 if (maximized) {
 785                     restore();
 786                 } else {
 787                     maximize();
 788                 }
 789             }
 790
 791         } // if (!(this instanceof TDesktop))
 792
 793         // I didn't take it, pass it on to my children
 794         super.onCommand(command);
 795     }
 796
 797     /**
 798      * Handle posted menu events.
 799      *
 800      * @param menu menu event
 801      */
 802     @Override
 803     public void onMenu(final TMenuEvent menu) {
 804
 805         if (!(this instanceof TDesktop)) {
 806
 807             if (menu.getId() == TMenu.MID_WINDOW_CLOSE) {
 808                 if ((flags & NOCLOSEBOX) == 0) {
 809                     if ((flags & HIDEONCLOSE) == 0) {
 810                         // Close window
 811                         application.closeWindow(this);
 812                     } else {
 813                         // Hide window
 814                         application.hideWindow(this);
 815                     }
 816                 }
 817                 return;
 818             }
 819
 820             if (menu.getId() == TMenu.MID_WINDOW_NEXT) {
 821                 application.switchWindow(true);
 822                 return;
 823             }
 824
 825             if (menu.getId() == TMenu.MID_WINDOW_PREVIOUS) {
 826                 application.switchWindow(false);
 827                 return;
 828             }
 829
 830             if (menu.getId() == TMenu.MID_WINDOW_MOVE) {
 831                 inKeyboardResize = true;
 832                 return;
 833             }
 834
 835             if ((menu.getId() == TMenu.MID_WINDOW_ZOOM)
 836                 && ((flags & NOZOOMBOX) == 0)
 837             ) {
 838                 if (maximized) {
 839                     restore();
 840                 } else {
 841                     maximize();
 842                 }
 843                 return;
 844             }
 845
 846         } // if (!(this instanceof TDesktop))
 847
 848         // I didn't take it, pass it on to my children
 849         super.onMenu(menu);
 850     }
 851
 852     // ------------------------------------------------------------------------
 853     // TWidget ----------------------------------------------------------------
 854     // ------------------------------------------------------------------------
 855
 856     /**
 857      * Get this TWindow's parent TApplication.
 858      *
 859      * @return this TWindow's parent TApplication
 860      */
 861     @Override
 862     public final TApplication getApplication() {
 863         return application;
 864     }
 865
 866     /**
 867      * Get the Screen.
 868      *
 869      * @return the Screen
 870      */
 871     @Override
 872     public final Screen getScreen() {
 873         return application.getScreen();
 874     }
 875
 876     /**
 877      * Called by TApplication.drawChildren() to render on screen.
 878      */
 879     @Override
 880     public void draw() {
 881         // Draw the box and background first.
 882         CellAttributes border = getBorder();
 883         CellAttributes background = getBackground();
 884         int borderType = getBorderType();
 885
 886         drawBox(0, 0, getWidth(), getHeight(), border, background, borderType,
 887             true);
 888
 889         // Draw the title
 890         int titleLeft = (getWidth() - title.length() - 2) / 2;
 891         putCharXY(titleLeft, 0, ' ', border);
 892         putStringXY(titleLeft + 1, 0, title);
 893         putCharXY(titleLeft + title.length() + 1, 0, ' ', border);
 894
 895         if (isActive()) {
 896
 897             // Draw the close button
 898             if ((flags & NOCLOSEBOX) == 0) {
 899                 putCharXY(2, 0, '[', border);
 900                 putCharXY(4, 0, ']', border);
 901                 if (mouseOnClose() && mouse.isMouse1()) {
 902                     putCharXY(3, 0, GraphicsChars.CP437[0x0F],
 903                         getBorderControls());
 904                 } else {
 905                     putCharXY(3, 0, GraphicsChars.CP437[0xFE],
 906                         getBorderControls());
 907                 }
 908             }
 909
 910             // Draw the maximize button
 911             if (!isModal() && ((flags & NOZOOMBOX) == 0)) {
 912
 913                 putCharXY(getWidth() - 5, 0, '[', border);
 914                 putCharXY(getWidth() - 3, 0, ']', border);
 915                 if (mouseOnMaximize() && mouse.isMouse1()) {
 916                     putCharXY(getWidth() - 4, 0, GraphicsChars.CP437[0x0F],
 917                         getBorderControls());
 918                 } else {
 919                     if (maximized) {
 920                         putCharXY(getWidth() - 4, 0, GraphicsChars.CP437[0x12],
 921                             getBorderControls());
 922                     } else {
 923                         putCharXY(getWidth() - 4, 0, GraphicsChars.UPARROW,
 924                             getBorderControls());
 925                     }
 926                 }
 927
 928                 // Draw the resize corner
 929                 if ((flags & RESIZABLE) != 0) {
 930                     putCharXY(getWidth() - 2, getHeight() - 1,
 931                         GraphicsChars.SINGLE_BAR, getBorderControls());
 932                     putCharXY(getWidth() - 1, getHeight() - 1,
 933                         GraphicsChars.LRCORNER, getBorderControls());
 934                 }
 935             }
 936         }
 937     }
 938
 939     // ------------------------------------------------------------------------
 940     // TWindow ----------------------------------------------------------------
 941     // ------------------------------------------------------------------------
 942
 943     /**
 944      * Get window title.
 945      *
 946      * @return window title
 947      */
 948     public final String getTitle() {
 949         return title;
 950     }
 951
 952     /**
 953      * Set window title.
 954      *
 955      * @param title new window title
 956      */
 957     public final void setTitle(final String title) {
 958         this.title = title;
 959     }
 960
 961     /**
 962      * Get Z order.  Lower number means more in-front.
 963      *
 964      * @return Z value.  Lower number means more in-front.
 965      */
 966     public final int getZ() {
 967         return z;
 968     }
 969
 970     /**
 971      * Set Z order.  Lower number means more in-front.
 972      *
 973      * @param z the new Z value.  Lower number means more in-front.
 974      */
 975     public final void setZ(final int z) {
 976         this.z = z;
 977     }
 978
 979     /**
 980      * Add a keypress to be overridden for this window.
 981      *
 982      * @param key the key to start taking control of
 983      */
 984     protected void addShortcutKeypress(final TKeypress key) {
 985         keyboardShortcuts.add(key);
 986     }
 987
 988     /**
 989      * Remove a keypress to be overridden for this window.
 990      *
 991      * @param key the key to stop taking control of
 992      */
 993     protected void removeShortcutKeypress(final TKeypress key) {
 994         keyboardShortcuts.remove(key);
 995     }
 996
 997     /**
 998      * Remove all keypresses to be overridden for this window.
 999      */
1000     protected void clearShortcutKeypresses() {
1001         keyboardShortcuts.clear();
1002     }
1003
1004     /**
1005      * Determine if a keypress is overridden for this window.
1006      *
1007      * @param key the key to check
1008      * @return true if this window wants to process this key on its own
1009      */
1010     public boolean isShortcutKeypress(final TKeypress key) {
1011         return keyboardShortcuts.contains(key);
1012     }
1013
1014     /**
1015      * Get the window's status bar, or null if it does not have one.
1016      *
1017      * @return the status bar, or null
1018      */
1019     public TStatusBar getStatusBar() {
1020         return statusBar;
1021     }
1022
1023     /**
1024      * Set the window's status bar to a new one.
1025      *
1026      * @param text the status bar text
1027      * @return the status bar
1028      */
1029     public TStatusBar newStatusBar(final String text) {
1030         statusBar = new TStatusBar(this, text);
1031         return statusBar;
1032     }
1033
1034     /**
1035      * Set the maximum width for this window.
1036      *
1037      * @param maximumWindowWidth new maximum width
1038      */
1039     public final void setMaximumWindowWidth(final int maximumWindowWidth) {
1040         if ((maximumWindowWidth != -1)
1041             && (maximumWindowWidth < minimumWindowWidth + 1)
1042         ) {
1043             throw new IllegalArgumentException("Maximum window width cannot " +
1044                 "be smaller than minimum window width + 1");
1045         }
1046         this.maximumWindowWidth = maximumWindowWidth;
1047     }
1048
1049     /**
1050      * Set the minimum width for this window.
1051      *
1052      * @param minimumWindowWidth new minimum width
1053      */
1054     public final void setMinimumWindowWidth(final int minimumWindowWidth) {
1055         if ((maximumWindowWidth != -1)
1056             && (minimumWindowWidth > maximumWindowWidth - 1)
1057         ) {
1058             throw new IllegalArgumentException("Minimum window width cannot " +
1059                 "be larger than maximum window width - 1");
1060         }
1061         this.minimumWindowWidth = minimumWindowWidth;
1062     }
1063
1064     /**
1065      * Set the maximum height for this window.
1066      *
1067      * @param maximumWindowHeight new maximum height
1068      */
1069     public final void setMaximumWindowHeight(final int maximumWindowHeight) {
1070         if ((maximumWindowHeight != -1)
1071             && (maximumWindowHeight < minimumWindowHeight + 1)
1072         ) {
1073             throw new IllegalArgumentException("Maximum window height cannot " +
1074                 "be smaller than minimum window height + 1");
1075         }
1076         this.maximumWindowHeight = maximumWindowHeight;
1077     }
1078
1079     /**
1080      * Set the minimum height for this window.
1081      *
1082      * @param minimumWindowHeight new minimum height
1083      */
1084     public final void setMinimumWindowHeight(final int minimumWindowHeight) {
1085         if ((maximumWindowHeight != -1)
1086             && (minimumWindowHeight > maximumWindowHeight - 1)
1087         ) {
1088             throw new IllegalArgumentException("Minimum window height cannot " +
1089                 "be larger than maximum window height - 1");
1090         }
1091         this.minimumWindowHeight = minimumWindowHeight;
1092     }
1093
1094     /**
1095      * Recenter the window on-screen.
1096      */
1097     public final void center() {
1098         if ((flags & CENTERED) != 0) {
1099             if (getWidth() < getScreen().getWidth()) {
1100                 setX((getScreen().getWidth() - getWidth()) / 2);
1101             } else {
1102                 setX(0);
1103             }
1104             setY(((application.getDesktopBottom()
1105                     - application.getDesktopTop()) - getHeight()) / 2);
1106             if (getY() < 0) {
1107                 setY(0);
1108             }
1109             setY(getY() + application.getDesktopTop());
1110         }
1111     }
1112
1113     /**
1114      * Maximize window.
1115      */
1116     public void maximize() {
1117         if (maximized) {
1118             return;
1119         }
1120
1121         restoreWindowWidth = getWidth();
1122         restoreWindowHeight = getHeight();
1123         restoreWindowX = getX();
1124         restoreWindowY = getY();
1125         setWidth(getScreen().getWidth());
1126         setHeight(application.getDesktopBottom() - 1);
1127         setX(0);
1128         setY(1);
1129         maximized = true;
1130
1131         onResize(new TResizeEvent(TResizeEvent.Type.WIDGET, getWidth(),
1132                 getHeight()));
1133     }
1134
1135     /**
1136      * Restore (unmaximize) window.
1137      */
1138     public void restore() {
1139         if (!maximized) {
1140             return;
1141         }
1142
1143         setWidth(restoreWindowWidth);
1144         setHeight(restoreWindowHeight);
1145         setX(restoreWindowX);
1146         setY(restoreWindowY);
1147         maximized = false;
1148
1149         onResize(new TResizeEvent(TResizeEvent.Type.WIDGET, getWidth(),
1150                 getHeight()));
1151     }
1152
1153     /**
1154      * Returns true if this window is hidden.
1155      *
1156      * @return true if this window is hidden, false if the window is shown
1157      */
1158     public final boolean isHidden() {
1159         return hidden;
1160     }
1161
1162     /**
1163      * Returns true if this window is shown.
1164      *
1165      * @return true if this window is shown, false if the window is hidden
1166      */
1167     public final boolean isShown() {
1168         return !hidden;
1169     }
1170
1171     /**
1172      * Hide window.  A hidden window will still have its onIdle() called, and
1173      * will also have onClose() called at application exit.  Hidden windows
1174      * will not receive any other events.
1175      */
1176     public void hide() {
1177         application.hideWindow(this);
1178     }
1179
1180     /**
1181      * Show window.
1182      */
1183     public void show() {
1184         application.showWindow(this);
1185     }
1186
1187     /**
1188      * Activate window (bring to top and receive events).
1189      */
1190     public void activate() {
1191         application.activateWindow(this);
1192     }
1193
1194     /**
1195      * Close window.  Note that windows without a close box can still be
1196      * closed by calling the close() method.
1197      */
1198     public void close() {
1199         application.closeWindow(this);
1200     }
1201
1202     /**
1203      * See if this window is undergoing any movement/resize/etc.
1204      *
1205      * @return true if the window is moving
1206      */
1207     public boolean inMovements() {
1208         if (inWindowResize || inWindowMove || inKeyboardResize) {
1209             return true;
1210         }
1211         return false;
1212     }
1213
1214     /**
1215      * Stop any pending movement/resize/etc.
1216      */
1217     public void stopMovements() {
1218         inWindowResize = false;
1219         inWindowMove = false;
1220         inKeyboardResize = false;
1221     }
1222
1223     /**
1224      * Returns true if this window is modal.
1225      *
1226      * @return true if this window is modal
1227      */
1228     public final boolean isModal() {
1229         if ((flags & MODAL) == 0) {
1230             return false;
1231         }
1232         return true;
1233     }
1234
1235     /**
1236      * Returns true if this window has a close box.
1237      *
1238      * @return true if this window has a close box
1239      */
1240     public final boolean hasCloseBox() {
1241         if ((flags & NOCLOSEBOX) != 0) {
1242             return true;
1243         }
1244         return false;
1245     }
1246
1247     /**
1248      * Returns true if this window has a maximize/zoom box.
1249      *
1250      * @return true if this window has a maximize/zoom box
1251      */
1252     public final boolean hasZoomBox() {
1253         if ((flags & NOZOOMBOX) != 0) {
1254             return true;
1255         }
1256         return false;
1257     }
1258
1259     /**
1260      * Returns true if this window does not want menus to work while it is
1261      * visible.
1262      *
1263      * @return true if this window does not want menus to work while it is
1264      * visible
1265      */
1266     public final boolean hasOverriddenMenu() {
1267         if ((flags & OVERRIDEMENU) != 0) {
1268             return true;
1269         }
1270         return false;
1271     }
1272
1273     /**
1274      * Retrieve the background color.
1275      *
1276      * @return the background color
1277      */
1278     public CellAttributes getBackground() {
1279         if (!isModal()
1280             && (inWindowMove || inWindowResize || inKeyboardResize)
1281         ) {
1282             assert (isActive());
1283             return getTheme().getColor("twindow.background.windowmove");
1284         } else if (isModal() && inWindowMove) {
1285             assert (isActive());
1286             return getTheme().getColor("twindow.background.modal");
1287         } else if (isModal()) {
1288             if (isActive()) {
1289                 return getTheme().getColor("twindow.background.modal");
1290             }
1291             return getTheme().getColor("twindow.background.modal.inactive");
1292         } else if (isActive()) {
1293             assert (!isModal());
1294             return getTheme().getColor("twindow.background");
1295         } else {
1296             assert (!isModal());
1297             return getTheme().getColor("twindow.background.inactive");
1298         }
1299     }
1300
1301     /**
1302      * Retrieve the border color.
1303      *
1304      * @return the border color
1305      */
1306     public CellAttributes getBorder() {
1307         if (!isModal()
1308             && (inWindowMove || inWindowResize || inKeyboardResize)
1309         ) {
1310             if (!isActive()) {
1311                 // The user's terminal never passed a mouse up event, and now
1312                 // another window is active but we never finished a drag.
1313                 inWindowMove = false;
1314                 inWindowResize = false;
1315                 inKeyboardResize = false;
1316                 return getTheme().getColor("twindow.border.inactive");
1317             }
1318
1319             return getTheme().getColor("twindow.border.windowmove");
1320         } else if (isModal() && inWindowMove) {
1321             assert (isActive());
1322             return getTheme().getColor("twindow.border.modal.windowmove");
1323         } else if (isModal()) {
1324             if (isActive()) {
1325                 return getTheme().getColor("twindow.border.modal");
1326             } else {
1327                 return getTheme().getColor("twindow.border.modal.inactive");
1328             }
1329         } else if (isActive()) {
1330             assert (!isModal());
1331             return getTheme().getColor("twindow.border");
1332         } else {
1333             assert (!isModal());
1334             return getTheme().getColor("twindow.border.inactive");
1335         }
1336     }
1337
1338     /**
1339      * Retrieve the color used by the window movement/sizing controls.
1340      *
1341      * @return the color used by the zoom box, resize bar, and close box
1342      */
1343     public CellAttributes getBorderControls() {
1344         if (isModal()) {
1345             return getTheme().getColor("twindow.border.modal.windowmove");
1346         }
1347         return getTheme().getColor("twindow.border.windowmove");
1348     }
1349
1350     /**
1351      * Retrieve the border line type.
1352      *
1353      * @return the border line type
1354      */
1355     private int getBorderType() {
1356         if (!isModal()
1357             && (inWindowMove || inWindowResize || inKeyboardResize)
1358         ) {
1359             assert (isActive());
1360             return 1;
1361         } else if (isModal() && inWindowMove) {
1362             assert (isActive());
1363             return 1;
1364         } else if (isModal()) {
1365             if (isActive()) {
1366                 return 2;
1367             } else {
1368                 return 1;
1369             }
1370         } else if (isActive()) {
1371             return 2;
1372         } else {
1373             return 1;
1374         }
1375     }
1376
1377     /**
1378      * Returns true if this window does not want the application-wide mouse
1379      * cursor drawn over it.
1380      *
1381      * @return true if this window does not want the application-wide mouse
1382      * cursor drawn over it
1383      */
1384     public final boolean hasHiddenMouse() {
1385         return hideMouse;
1386     }
1387
1388     /**
1389      * Set request to prevent the application-wide mouse cursor from being
1390      * drawn over this window.
1391      *
1392      * @param hideMouse if true, this window does not want the
1393      * application-wide mouse cursor drawn over it
1394      */
1395     public final void setHiddenMouse(final boolean hideMouse) {
1396         this.hideMouse = hideMouse;
1397     }
1398
1399 }