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Annotation of 43BSD/contrib/X/uwm/Move.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid_Move_c = "$Header: Move.c,v 10.3 86/02/01 16:23:17 tony Rel $";
        !             3: #endif lint
        !             4: 
        !             5: /************************************************************************
        !             6:  *                                                                     *
        !             7:  *                     Copyright (c) 1986 by                           *
        !             8:  *             Digital Equipment Corporation, Maynard, MA              *
        !             9:  *                      All Rights Reserved.                           *
        !            10:  *                                                                     *
        !            11:  *     Permission to use, copy, modify, and distribute this software   *
        !            12:  *     and its documentation is hereby granted only to licensees of    *
        !            13:  *     The Regents of the University of California pursuant to their   *
        !            14:  *     license agreement for the Berkeley Software Distribution        *
        !            15:  *     provided that the following appears on all copies.              *
        !            16:  *                                                                     *
        !            17:  *            "LICENSED FROM DIGITAL EQUIPMENT CORPORATION             *
        !            18:  *                      COPYRIGHT (C) 1986                             *       
        !            19:  *                 DIGITAL EQUIPMENT CORPORATION                       *
        !            20:  *                         MAYNARD, MA                                 *
        !            21:  *                     ALL RIGHTS RESERVED.                            *
        !            22:  *                                                                     *
        !            23:  *      THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT  * 
        !            24:  *     NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL   *
        !            25:  *     EQUIPMENT CORPORATION.  DIGITAL MAKES NO REPRESENTATIONS        *
        !            26:  *     ABOUT SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. IT IS       *
        !            27:  *     SUPPLIED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.           *
        !            28:  *                                                                     *       
        !            29:  *     IF THE UNIVERSITY OF CALIFORNIA OR ITS LICENSEES MODIFY         *       
        !            30:  *     THE SOFTWARE IN A MANNER CREATING DERIVATIVE COPYRIGHT          *       
        !            31:  *     RIGHTS APPROPRIATE COPYRIGHT LEGENDS MAY BE PLACED ON THE       *
        !            32:  *     DERIVATIVE WORK IN ADDITION TO THAT SET FORTH ABOVE."           *       
        !            33:  *                                                                     *
        !            34:  ************************************************************************/
        !            35:  
        !            36: 
        !            37: /*
        !            38:  * MODIFICATION HISTORY
        !            39:  *
        !            40:  * 000 -- M. Gancarz, DEC Ultrix Engineering Group
        !            41:  */
        !            42: 
        !            43: #ifndef lint
        !            44: static char *sccsid = "@(#)Move.c      3.8     1/24/86";
        !            45: #endif
        !            46: 
        !            47: #include "uwm.h"
        !            48: 
        !            49: Bool Move(window, mask, button, x, y)
        !            50: Window window;                         /* Event window. */
        !            51: int mask;                              /* Button/key mask. */
        !            52: short button;                          /* Button event detail. */
        !            53: int x, y;                              /* Event mouse position. */
        !            54: {
        !            55:     register int prev_x;               /* Previous event window X location. */
        !            56:     register int prev_y;               /* Previous event window Y location. */
        !            57:     register WindowInfo window_info;   /* Event window information. */
        !            58:     int cur_x;                         /* Current event window X location. */
        !            59:     int cur_y;                         /* Current event window Y location. */
        !            60:     int ulx, uly;                      /* Event window upper left X and Y. */
        !            61:     int lrx, lry;                      /* Event window lower right X and Y. */
        !            62:     int init_ulx, init_uly;            /* Init window upper left X and Y. */
        !            63:     int init_lrx, init_lry;            /* Init window lower right X and Y. */
        !            64:     int num_vectors;                   /* Number of vectors in box. */
        !            65:     Window sub_window;                 /* Query mouse event sub-window. */
        !            66:     XButtonEvent button_event;         /* Button event packet. */
        !            67:     Vertex box[MAX_BOX_VECTORS];       /* Box vertex buffer. */
        !            68:     Vertex zap[MAX_ZAP_VECTORS];       /* Zap effect verted buffer. */
        !            69: 
        !            70:     /*
        !            71:      * Do not try to move the root window.
        !            72:      */
        !            73:     if (window == RootWindow)
        !            74:         return(FALSE);
        !            75: 
        !            76:     /*
        !            77:      * Change the cursor.
        !            78:      */
        !            79:     status = XGrabButton(RootWindow, ArrowCrossCursor, mask, EVENTMASK);
        !            80:     if (status == FAILURE)
        !            81:         Error("Move -> Unable to grab button and change cursor.");
        !            82: 
        !            83:     /*
        !            84:      * Clear the vector buffers.
        !            85:      */
        !            86:     bzero(box, sizeof(box));
        !            87:     if (Zap) bzero(zap, sizeof(zap));
        !            88:     
        !            89:     /*
        !            90:      * Gather info on the event window.
        !            91:      */
        !            92:     status = XQueryWindow(window, &window_info);
        !            93:     if (status == FAILURE) return(FALSE);
        !            94: 
        !            95:     /*
        !            96:      * Initialize movement variables.
        !            97:      */
        !            98:     init_ulx = ulx = window_info.x;
        !            99:     init_uly = uly = window_info.y;
        !           100:     init_lrx = lrx = window_info.x + window_info.width +
        !           101:                      (window_info.bdrwidth << 1) - 1;
        !           102:     init_lry = lry = window_info.y + window_info.height +
        !           103:                      (window_info.bdrwidth << 1) - 1;
        !           104: 
        !           105:     /*
        !           106:      * Store the box.
        !           107:      */
        !           108:     if (Grid)
        !           109:         num_vectors = StoreGridBox(box, ulx, uly, lrx, lry);
        !           110:     else num_vectors = StoreBox(box, ulx, uly, lrx, lry);
        !           111: 
        !           112:     /*
        !           113:      * Initialize the previous location variables.
        !           114:      */
        !           115:     prev_x = x;
        !           116:     prev_y = y;
        !           117: 
        !           118:     /*
        !           119:      * Freeze the server, if requested by the user.
        !           120:      * This results in a solid box instead of a flickering one.
        !           121:      */
        !           122:     if (Freeze) XGrabServer();
        !           123: 
        !           124:     /*
        !           125:      * Process any pending exposure events before drawing the box.
        !           126:      */
        !           127:     while (QLength() > 0) {
        !           128:         XPeekEvent(&button_event);
        !           129:         if (button_event.window == RootWindow)
        !           130:             break;
        !           131:         GetButton(&button_event);
        !           132:     }
        !           133: 
        !           134:     /*
        !           135:      * Now draw the box.
        !           136:      */
        !           137:     DrawBox();
        !           138:     Frozen = window;
        !           139: 
        !           140:     /*
        !           141:      * Main loop.
        !           142:      */
        !           143:     while (TRUE) {
        !           144: 
        !           145:        /*
        !           146:         * Check to see if we have a change in mouse button status.
        !           147:         * This is how we get out of this "while" loop.
        !           148:         */
        !           149:        if (XPending() && GetButton(&button_event)) {
        !           150:            /*
        !           151:             * Process the pending events, this sequence is the only
        !           152:             * way out of the loop and the routine.
        !           153:             */
        !           154: 
        !           155:             /*
        !           156:              * If we froze the server, then erase the last lines drawn.
        !           157:              */
        !           158:             if (Freeze) {
        !           159:                 DrawBox();
        !           160:                 Frozen = (Window)0;
        !           161:                 XUngrabServer();
        !           162:             }
        !           163: 
        !           164:            if ((button_event.type == ButtonReleased) &&
        !           165:                ((button_event.detail & ValueMask) == button)) {
        !           166: 
        !           167:                /*
        !           168:                 * The button was released, so reset the cursor and
        !           169:                 * move the window.
        !           170:                 */
        !           171:                 Grab(mask);
        !           172: 
        !           173:                if (Zap) {
        !           174:                     num_vectors = StoreZap(zap,
        !           175:                                            init_ulx, init_uly,
        !           176:                                            init_lrx, init_lry,
        !           177:                                            ulx, uly,
        !           178:                                            lrx, lry);
        !           179:                     DrawZap();
        !           180:                     DrawZap();
        !           181:                 }
        !           182:                XMoveWindow(window, ulx, uly);
        !           183:                return(TRUE);
        !           184:            }
        !           185:            else {
        !           186: 
        !           187:                /*
        !           188:                 * Some other button event occured, this aborts the
        !           189:                 * current operation.
        !           190:                 */
        !           191: 
        !           192:                /*
        !           193:                 * Reset the cursor.
        !           194:                 */
        !           195:                 Grab(mask);
        !           196:                return(TRUE);
        !           197:            }
        !           198:        }
        !           199: 
        !           200:         /*
        !           201:          * Take care of all the little things that have changed.
        !           202:          */
        !           203:         XUpdateMouse(RootWindow, &cur_x, &cur_y, &sub_window);
        !           204:         if ((cur_x != prev_x) || (cur_y != prev_y)) {
        !           205: 
        !           206:             /*
        !           207:              * If we've frozen the server, then erase the old box first!
        !           208:              */
        !           209:             if (Freeze)
        !           210:                 DrawBox();
        !           211: 
        !           212:             /*
        !           213:              * Box position has changed.
        !           214:              */
        !           215:             ulx += cur_x - prev_x;
        !           216:             uly += cur_y - prev_y;
        !           217:             lrx += cur_x - prev_x;
        !           218:             lry += cur_y - prev_y;
        !           219: 
        !           220:             /*
        !           221:              * Box needs to be restored.
        !           222:              */
        !           223:             if (Grid)
        !           224:                 num_vectors = StoreGridBox(box, ulx, uly, lrx, lry);
        !           225:             else num_vectors = StoreBox(box, ulx, uly, lrx, lry);
        !           226: 
        !           227: 
        !           228:             /*
        !           229:              * Draw the new box.
        !           230:              */
        !           231:             if (Freeze)
        !           232:                 DrawBox();
        !           233:        }
        !           234: 
        !           235:        /* 
        !           236:         * Save old box position.
        !           237:         */
        !           238:        prev_x = cur_x;
        !           239:        prev_y = cur_y;
        !           240: 
        !           241:         /*
        !           242:          * If server is not frozen, then draw the "flicker" box.
        !           243:          */
        !           244:         if (!Freeze) {
        !           245:             DrawBox();
        !           246:             DrawBox();
        !           247:         }
        !           248:     }
        !           249: }

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