contrib/dialog/mouse.c

   1 /*
   2  * $Id: mouse.c,v 1.21 2015/05/13 20:56:28 tom Exp $
   3  *
   4  * mouse.c -- mouse support for dialog
   5  *
   6  * Copyright 2002-2012,2015     Thomas E. Dickey
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU Lesser General Public License, version 2.1
  10  *  as published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful, but
  13  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Lesser General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Lesser General Public
  18  *  License along with this program; if not, write to
  19  *      Free Software Foundation, Inc.
  20  *      51 Franklin St., Fifth Floor
  21  *      Boston, MA 02110, USA.
  22  */
  23
  24 #include <dialog.h>
  25 #include <dlg_keys.h>
  26
  27 #if USE_MOUSE
  28
  29 static int basex, basey, basecode;
  30
  31 static mseRegion *regionList = NULL;
  32
  33 /*=========== region related functions =============*/
  34
  35 static mseRegion *
  36 find_region_by_code(int code)
  37 {
  38     mseRegion *butPtr;
  39
  40     for (butPtr = regionList; butPtr; butPtr = butPtr->next) {
  41         if (code == butPtr->code)
  42             break;
  43     }
  44     return butPtr;
  45 }
  46
  47 void
  48 dlg_mouse_setbase(int x, int y)
  49 {
  50     basex = x;
  51     basey = y;
  52 }
  53
  54 void
  55 dlg_mouse_setcode(int code)
  56 {
  57     basecode = code;
  58 }
  59
  60 void
  61 dlg_mouse_mkbigregion(int y, int x,
  62                       int height, int width,
  63                       int code,
  64                       int step_y, int step_x,
  65                       int mode)
  66 {
  67     mseRegion *butPtr = dlg_mouse_mkregion(y, x, height, width, -DLGK_MOUSE(code));
  68     butPtr->mode = mode;
  69     butPtr->step_x = MAX(1, step_x);
  70     butPtr->step_y = MAX(1, step_y);
  71 }
  72
  73 void
  74 dlg_mouse_free_regions(void)
  75 {
  76     while (regionList != 0) {
  77         mseRegion *butPtr = regionList->next;
  78         free(regionList);
  79         regionList = butPtr;
  80     }
  81 }
  82
  83 mseRegion *
  84 dlg_mouse_mkregion(int y, int x, int height, int width, int code)
  85 {
  86     mseRegion *butPtr;
  87
  88     if ((butPtr = find_region_by_code(basecode + code)) == 0) {
  89         butPtr = dlg_malloc(mseRegion, 1);
  90         assert_ptr(butPtr, "dlg_mouse_mkregion");
  91         butPtr->next = regionList;
  92         regionList = butPtr;
  93     }
  94
  95     butPtr->mode = -1;
  96     butPtr->step_x = 0;
  97     butPtr->step_y = 0;
  98     butPtr->y = basey + y;
  99     butPtr->Y = basey + y + height;
 100     butPtr->x = basex + x;
 101     butPtr->X = basex + x + width;
 102     butPtr->code = basecode + code;
 103
 104     return butPtr;
 105 }
 106
 107 /* retrieve the frame under the pointer */
 108 static mseRegion *
 109 any_mouse_region(int y, int x, int small)
 110 {
 111     mseRegion *butPtr;
 112
 113     for (butPtr = regionList; butPtr; butPtr = butPtr->next) {
 114         if (small ^ (butPtr->code >= 0)) {
 115             continue;
 116         }
 117         if (y < butPtr->y || y >= butPtr->Y) {
 118             continue;
 119         }
 120         if (x < butPtr->x || x >= butPtr->X) {
 121             continue;
 122         }
 123         break;                  /* found */
 124     }
 125     return butPtr;
 126 }
 127
 128 /* retrieve the frame under the pointer */
 129 mseRegion *
 130 dlg_mouse_region(int y, int x)
 131 {
 132     return any_mouse_region(y, x, TRUE);
 133 }
 134
 135 /* retrieve the bigframe under the pointer */
 136 mseRegion *
 137 dlg_mouse_bigregion(int y, int x)
 138 {
 139     return any_mouse_region(y, x, FALSE);
 140 }
 141
 142 #else
 143 void mouse_dummy(void);
 144 void
 145 mouse_dummy(void)
 146 {
 147 }
 148 #endif /* USE_MOUSE */