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Member "grpn-1.1.7.4/callback_buttons.c" of archive grpn-1.1.7.4.tar.gz:
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1 /*
2
3 Copyright (C) 2002 Paul Wilkins
4
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 */
20 /* callback_buttons.c by Paul Wilkins */
21
22 #include <stdio.h>
23 #include <gtk/gtk.h>
24
25 #include "buttons.h"
26 #include "funcs.h"
27 #include "editor.h"
28 #include "error.h"
29 #include "lcd.h"
30
31
32 /* the generic button callback function */
33 void genericButtonCB(GtkWidget *w, gpointer clientData){
34 FuncInfo *fi = (FuncInfo *)clientData;
35 void (*func)();
36
37 /* reset any error string */
38 resetError();
39
40 /* call the real work function */
41 if(fi->data){
42 func = fi->data;
43 func();
44 redrawLCD();
45 }
46 }
47
48 /* the null button callback function */
49 void nullButtonCB(GtkWidget *w, gpointer clientData){
50 printf("Sorry: Unimpilmented feature\n");
51 }
52
53 /* inserts a char into the edit buffer */
54 void enterNumCB(GtkWidget *w, gpointer clientData){
55 int tmp;
56 FuncInfo *fi = (FuncInfo *)clientData;
57
58 /* reset any error string */
59 resetError();
60
61 tmp = (int)fi->data;
62 insertEditor(tmp);
63 redrawLCD();
64 }
65
66
67 /* the +/- key needs a special callback */
68 /* this is unnessisarily complicated */
69 void plusMinusCB(GtkWidget *w, gpointer clientData){
70 char *p, *line;
71 int i, pos, foundE;
72
73 /* reset any error string */
74 resetError();
75
76 if(isEditingEditor()){
77 line = getLineEditor();
78
79 /* look for an 'e' or 'E' */
80 foundE = 0;
81 for(p=line; *p!='\0'; p++){
82 if(*p == 'e' || *p == 'E'){
83 foundE = 1;
84 break;
85 }
86 }
87
88 pos = cursorPosEditor();
89
90 /* if we found an exponent */
91 if(foundE){
92 p++;
93
94 /* put the cursor after the 'e' or 'E' */
95 for(i=(p-line)-pos; i>0; i--) rightEditor();
96 for(i=pos-(p-line); i>0; i--) leftEditor();
97
98 if(*p == '+'){
99 rightEditor();
100 deleteEditor();
101 insertEditor('-');
102 if(pos-(p-line) > 0) pos--;
103 } else if(*p == '-'){
104 rightEditor();
105 deleteEditor();
106 insertEditor('+');
107 if(pos-(p-line) > 0) pos--;
108 } else {
109 insertEditor('-');
110 pos++;
111 }
112
113 /* restore the cursor to where it should be */
114 for(i=(p-line)-pos+1; i>0; i--) leftEditor();
115 for(i=pos-(p-line); i>0; i--) rightEditor();
116
117 }
118
119 /* we didn't find an exponent */
120 else {
121 homeEditor();
122 if(*line == '+'){
123 rightEditor();
124 deleteEditor();
125 insertEditor('-');
126 pos--;
127 } else if(*line == '-'){
128 rightEditor();
129 deleteEditor();
130 insertEditor('+');
131 pos--;
132 } else {
133 insertEditor('-');
134 }
135 for(i=0; i<pos; i++) rightEditor();
136 }
137 } else {
138
139 NegStack();
140 }
141
142 redrawLCD();
143 }
144