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182 lines
5.3 KiB
C
182 lines
5.3 KiB
C
/**
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* \file
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* An experimental CTK text edit widget.
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* \author Adam Dunkels <adam@dunkels.com>
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*
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* This module contains an experimental CTK widget which is
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* implemented in the application process rather than in the CTK
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* process. The widget is instantiated in a similar fashion as other
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* CTK widgets, but is different from other widgets in that it
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* requires a signal handler function to be called by the process
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* signal handler function.
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*
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*/
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/*
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* Copyright (c) 2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki desktop environment
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*
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* $Id: ctk-textedit.c,v 1.1 2006/06/17 22:41:17 adamdunkels Exp $
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*
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*/
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#include "ctk-textedit.h"
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#include <string.h>
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/*-----------------------------------------------------------------------------------*/
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void
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ctk_textedit_init(struct ctk_textedit *t)
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{
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t->xpos = t->ypos = 0;
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}
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/*-----------------------------------------------------------------------------------*/
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/**
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* Add a CTK textedit widget to a window.
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*
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* \param w A pointer to the window to which the entry is to be added.
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* \param t A pointer to the CTK textentry structure.
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*/
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/*-----------------------------------------------------------------------------------*/
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void
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ctk_textedit_add(struct ctk_window *w,
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struct ctk_textedit *t)
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{
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CTK_WIDGET_SET_FLAG(t, CTK_WIDGET_FLAG_MONOSPACE);
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CTK_WIDGET_ADD(w, t);
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}
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/*-----------------------------------------------------------------------------------*/
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/**
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* The CTK textedit signal handler.
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*
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* This function must be called as part of the normal signal handler
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* of the process that contains the CTK textentry structure.
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*
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* \param t A pointer to the CTK textentry structure.
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* \param s The signal number.
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* \param data The signal data.
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*/
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/*-----------------------------------------------------------------------------------*/
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void
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ctk_textedit_eventhandler(struct ctk_textedit *t,
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process_event_t s,
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process_data_t data)
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{
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char *textptr, *textptr2;
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unsigned char len;
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if(s == ctk_signal_keypress) {
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CTK_WIDGET_FOCUS(t->label.window, &t->label);
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textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]);
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*textptr &= 0x7f;
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switch((ctk_arch_key_t)data) {
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case CH_CURS_DOWN:
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if(t->ypos < t->label.h - 1) {
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++t->ypos;
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}
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break;
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case CH_CURS_UP:
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if(t->ypos > 0) {
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--t->ypos;
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}
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break;
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case CH_CURS_RIGHT:
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len = strlen(&t->label.text[t->ypos * t->label.w]);
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if(t->xpos < len) {
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/* if(t->xpos < t->label.w) {*/
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++t->xpos;
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} else {
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t->xpos = len;
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}
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break;
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case CH_CURS_LEFT:
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if(t->xpos > 0) {
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--t->xpos;
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} else {
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if(t->ypos > 0) {
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--t->ypos;
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t->xpos = t->label.w - 1;
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}
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}
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break;
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case CH_ENTER:
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t->xpos = 0;
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if(t->ypos < t->label.h - 1) {
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++t->ypos;
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}
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break;
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case CH_DEL:
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len = t->label.w - t->xpos;
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if(t->xpos > 0 && len > 0) {
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strncpy(textptr - 1, textptr,
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len);
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*(textptr + len - 1) = 0;
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--t->xpos;
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}
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break;
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default:
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len = t->label.w - t->xpos;
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if(len > 0) {
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textptr2 = textptr + len - 1;
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while(textptr2 + 1 > textptr) {
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*(textptr2 + 1) = *textptr2;
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--textptr2;
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}
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*textptr = (char)data;
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++t->xpos;
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if(t->xpos == t->label.w) {
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t->xpos = 0;
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if(t->ypos < t->label.h - 1) {
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++t->ypos;
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}
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}
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}
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break;
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}
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textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]);
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*textptr |= 0x80;
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CTK_WIDGET_REDRAW(&t->label);
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} else if(s == ctk_signal_widget_activate &&
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data == (process_data_t)t) {
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textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]);
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*textptr &= 0x7f;
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t->xpos = 0;
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if(t->ypos < t->label.h - 1) {
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++t->ypos;
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}
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textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]);
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*textptr |= 0x80;
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CTK_WIDGET_REDRAW(&t->label);
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}
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}
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/*-----------------------------------------------------------------------------------*/
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