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/*
Copyright (C) 2002 Paul Wilkins
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* callback_buttons.c by Paul Wilkins */
#include <stdio.h>
#include <gtk/gtk.h>
#include "buttons.h"
#include "funcs.h"
#include "editor.h"
#include "error.h"
#include "lcd.h"
/* the generic button callback function */
void genericButtonCB(GtkWidget *w, gpointer clientData){
FuncInfo *fi = (FuncInfo *)clientData;
void (*func)();
/* reset any error string */
resetError();
/* call the real work function */
if(fi->data){
func = fi->data;
func();
redrawLCD();
}
}
/* the null button callback function */
void nullButtonCB(GtkWidget *w, gpointer clientData){
printf("Sorry: Unimpilmented feature\n");
}
/* inserts a char into the edit buffer */
void enterNumCB(GtkWidget *w, gpointer clientData){
int tmp;
FuncInfo *fi = (FuncInfo *)clientData;
/* reset any error string */
resetError();
tmp = (int)fi->data;
insertEditor(tmp);
redrawLCD();
}
/* the +/- key needs a special callback */
/* this is unnessisarily complicated */
void plusMinusCB(GtkWidget *w, gpointer clientData){
char *p, *line;
int i, pos, foundE;
/* reset any error string */
resetError();
if(isEditingEditor()){
line = getLineEditor();
/* look for an 'e' or 'E' */
foundE = 0;
for(p=line; *p!='\0'; p++){
if(*p == 'e' || *p == 'E'){
foundE = 1;
break;
}
}
pos = cursorPosEditor();
/* if we found an exponent */
if(foundE){
p++;
/* put the cursor after the 'e' or 'E' */
for(i=(p-line)-pos; i>0; i--) rightEditor();
for(i=pos-(p-line); i>0; i--) leftEditor();
if(*p == '+'){
rightEditor();
deleteEditor();
insertEditor('-');
if(pos-(p-line) > 0) pos--;
} else if(*p == '-'){
rightEditor();
deleteEditor();
insertEditor('+');
if(pos-(p-line) > 0) pos--;
} else {
insertEditor('-');
pos++;
}
/* restore the cursor to where it should be */
for(i=(p-line)-pos+1; i>0; i--) leftEditor();
for(i=pos-(p-line); i>0; i--) rightEditor();
}
/* we didn't find an exponent */
else {
homeEditor();
if(*line == '+'){
rightEditor();
deleteEditor();
insertEditor('-');
pos--;
} else if(*line == '-'){
rightEditor();
deleteEditor();
insertEditor('+');
pos--;
} else {
insertEditor('-');
}
for(i=0; i<pos; i++) rightEditor();
}
} else {
NegStack();
}
redrawLCD();
}
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