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Annotation of 43BSDTahoe/new/X/uwm/Move.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char *rcsid_Move_c = "$Header: Move.c,v 10.4 86/11/19 16:24:03 jg Rel $";
        !             3: #endif lint
        !             4: 
        !             5: /*
        !             6:  *                     COPYRIGHT 1985, 1986
        !             7:  *                DIGITAL EQUIPMENT CORPORATION
        !             8:  *                    MAYNARD, MASSACHUSETTS
        !             9:  *                     ALL RIGHTS RESERVED.
        !            10:  *
        !            11:  * THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE AND
        !            12:  * SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT CORPORATION.
        !            13:  * DIGITAL MAKES NO REPRESENTATIONS ABOUT THE SUITIBILITY OF THIS SOFTWARE FOR
        !            14:  * ANY PURPOSE.  IT IS SUPPLIED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY.
        !            15:  *
        !            16:  * IF THE SOFTWARE IS MODIFIED IN A MANNER CREATING DERIVATIVE COPYRIGHT RIGHTS,
        !            17:  * APPROPRIATE LEGENDS MAY BE PLACED ON THE DERIVATIVE WORK IN ADDITION TO THAT
        !            18:  * SET FORTH ABOVE.
        !            19:  *
        !            20:  *
        !            21:  * Permission to use, copy, modify, and distribute this software and its
        !            22:  * documentation for any purpose and without fee is hereby granted, provided
        !            23:  * that the above copyright notice appear in all copies and that both that
        !            24:  * copyright notice and this permission notice appear in supporting documentation,
        !            25:  * and that the name of Digital Equipment Corporation not be used in advertising
        !            26:  * or publicity pertaining to distribution of the software without specific, 
        !            27:  * written prior permission.
        !            28:  *
        !            29:  */
        !            30: 
        !            31: 
        !            32: /*
        !            33:  * MODIFICATION HISTORY
        !            34:  *
        !            35:  * 000 -- M. Gancarz, DEC Ultrix Engineering Group
        !            36:  */
        !            37: 
        !            38: #ifndef lint
        !            39: static char *sccsid = "@(#)Move.c      3.8     1/24/86";
        !            40: #endif
        !            41: 
        !            42: #include "uwm.h"
        !            43: 
        !            44: Bool Move(window, mask, button, x, y)
        !            45: Window window;                         /* Event window. */
        !            46: int mask;                              /* Button/key mask. */
        !            47: short button;                          /* Button event detail. */
        !            48: int x, y;                              /* Event mouse position. */
        !            49: {
        !            50:     register int prev_x;               /* Previous event window X location. */
        !            51:     register int prev_y;               /* Previous event window Y location. */
        !            52:     register WindowInfo window_info;   /* Event window information. */
        !            53:     int cur_x;                         /* Current event window X location. */
        !            54:     int cur_y;                         /* Current event window Y location. */
        !            55:     int ulx, uly;                      /* Event window upper left X and Y. */
        !            56:     int lrx, lry;                      /* Event window lower right X and Y. */
        !            57:     int init_ulx, init_uly;            /* Init window upper left X and Y. */
        !            58:     int init_lrx, init_lry;            /* Init window lower right X and Y. */
        !            59:     int num_vectors;                   /* Number of vectors in box. */
        !            60:     Window sub_window;                 /* Query mouse event sub-window. */
        !            61:     XButtonEvent button_event;         /* Button event packet. */
        !            62:     Vertex box[MAX_BOX_VECTORS];       /* Box vertex buffer. */
        !            63:     Vertex zap[MAX_ZAP_VECTORS];       /* Zap effect verted buffer. */
        !            64: 
        !            65:     /*
        !            66:      * Do not try to move the root window.
        !            67:      */
        !            68:     if (window == RootWindow)
        !            69:         return(FALSE);
        !            70: 
        !            71:     /*
        !            72:      * Change the cursor.
        !            73:      */
        !            74:     status = XGrabButton(RootWindow, ArrowCrossCursor, mask, EVENTMASK);
        !            75:     if (status == FAILURE)
        !            76:         Error("Move -> Unable to grab button and change cursor.");
        !            77: 
        !            78:     /*
        !            79:      * Clear the vector buffers.
        !            80:      */
        !            81:     bzero(box, sizeof(box));
        !            82:     if (Zap) bzero(zap, sizeof(zap));
        !            83:     
        !            84:     /*
        !            85:      * Gather info on the event window.
        !            86:      */
        !            87:     status = XQueryWindow(window, &window_info);
        !            88:     if (status == FAILURE) return(FALSE);
        !            89: 
        !            90:     /*
        !            91:      * Initialize movement variables.
        !            92:      */
        !            93:     init_ulx = ulx = window_info.x;
        !            94:     init_uly = uly = window_info.y;
        !            95:     init_lrx = lrx = window_info.x + window_info.width +
        !            96:                      (window_info.bdrwidth << 1) - 1;
        !            97:     init_lry = lry = window_info.y + window_info.height +
        !            98:                      (window_info.bdrwidth << 1) - 1;
        !            99: 
        !           100:     /*
        !           101:      * Store the box.
        !           102:      */
        !           103:     if (Grid)
        !           104:         num_vectors = StoreGridBox(box, ulx, uly, lrx, lry);
        !           105:     else num_vectors = StoreBox(box, ulx, uly, lrx, lry);
        !           106: 
        !           107:     /*
        !           108:      * Initialize the previous location variables.
        !           109:      */
        !           110:     prev_x = x;
        !           111:     prev_y = y;
        !           112: 
        !           113:     /*
        !           114:      * Freeze the server, if requested by the user.
        !           115:      * This results in a solid box instead of a flickering one.
        !           116:      */
        !           117:     if (Freeze) XGrabServer();
        !           118: 
        !           119:     /*
        !           120:      * Process any pending exposure events before drawing the box.
        !           121:      */
        !           122:     while (QLength() > 0) {
        !           123:         XPeekEvent(&button_event);
        !           124:         if (button_event.window == RootWindow)
        !           125:             break;
        !           126:         GetButton(&button_event);
        !           127:     }
        !           128: 
        !           129:     /*
        !           130:      * Now draw the box.
        !           131:      */
        !           132:     DrawBox();
        !           133:     Frozen = window;
        !           134: 
        !           135:     /*
        !           136:      * Main loop.
        !           137:      */
        !           138:     while (TRUE) {
        !           139: 
        !           140:        /*
        !           141:         * Check to see if we have a change in mouse button status.
        !           142:         * This is how we get out of this "while" loop.
        !           143:         */
        !           144:        if (XPending() && GetButton(&button_event)) {
        !           145:            /*
        !           146:             * Process the pending events, this sequence is the only
        !           147:             * way out of the loop and the routine.
        !           148:             */
        !           149: 
        !           150:             /*
        !           151:              * If we froze the server, then erase the last lines drawn.
        !           152:              */
        !           153:             if (Freeze) {
        !           154:                 DrawBox();
        !           155:                 Frozen = (Window)0;
        !           156:                 XUngrabServer();
        !           157:             }
        !           158: 
        !           159:            if ((button_event.type == ButtonReleased) &&
        !           160:                ((button_event.detail & ValueMask) == button)) {
        !           161: 
        !           162:                /*
        !           163:                 * The button was released, so reset the cursor and
        !           164:                 * move the window.
        !           165:                 */
        !           166:                 Grab(mask);
        !           167: 
        !           168:                if (Zap) {
        !           169:                     num_vectors = StoreZap(zap,
        !           170:                                            init_ulx, init_uly,
        !           171:                                            init_lrx, init_lry,
        !           172:                                            ulx, uly,
        !           173:                                            lrx, lry);
        !           174:                     DrawZap();
        !           175:                     DrawZap();
        !           176:                 }
        !           177:                XMoveWindow(window, ulx, uly);
        !           178:                return(TRUE);
        !           179:            }
        !           180:            else {
        !           181: 
        !           182:                /*
        !           183:                 * Some other button event occured, this aborts the
        !           184:                 * current operation.
        !           185:                 */
        !           186: 
        !           187:                /*
        !           188:                 * Reset the cursor.
        !           189:                 */
        !           190:                 Grab(mask);
        !           191:                return(TRUE);
        !           192:            }
        !           193:        }
        !           194: 
        !           195:         /*
        !           196:          * Take care of all the little things that have changed.
        !           197:          */
        !           198:         XUpdateMouse(RootWindow, &cur_x, &cur_y, &sub_window);
        !           199:         if ((cur_x != prev_x) || (cur_y != prev_y)) {
        !           200: 
        !           201:             /*
        !           202:              * If we've frozen the server, then erase the old box first!
        !           203:              */
        !           204:             if (Freeze)
        !           205:                 DrawBox();
        !           206: 
        !           207:             /*
        !           208:              * Box position has changed.
        !           209:              */
        !           210:             ulx += cur_x - prev_x;
        !           211:             uly += cur_y - prev_y;
        !           212:             lrx += cur_x - prev_x;
        !           213:             lry += cur_y - prev_y;
        !           214: 
        !           215:             /*
        !           216:              * Box needs to be restored.
        !           217:              */
        !           218:             if (Grid)
        !           219:                 num_vectors = StoreGridBox(box, ulx, uly, lrx, lry);
        !           220:             else num_vectors = StoreBox(box, ulx, uly, lrx, lry);
        !           221: 
        !           222: 
        !           223:             /*
        !           224:              * Draw the new box.
        !           225:              */
        !           226:             if (Freeze)
        !           227:                 DrawBox();
        !           228:        }
        !           229: 
        !           230:        /* 
        !           231:         * Save old box position.
        !           232:         */
        !           233:        prev_x = cur_x;
        !           234:        prev_y = cur_y;
        !           235: 
        !           236:         /*
        !           237:          * If server is not frozen, then draw the "flicker" box.
        !           238:          */
        !           239:         if (!Freeze) {
        !           240:             DrawBox();
        !           241:             DrawBox();
        !           242:         }
        !           243:     }
        !           244: }

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