| /** |
| * \file |
| * An experimental CTK text edit widget. |
| * \author Adam Dunkels <adam@dunkels.com> |
| * |
| * This module contains an experimental CTK widget which is |
| * implemented in the application process rather than in the CTK |
| * process. The widget is instantiated in a similar fashion as other |
| * CTK widgets, but is different from other widgets in that it |
| * requires a signal handler function to be called by the process |
| * signal handler function. |
| * |
| */ |
| |
| /* |
| * Copyright (c) 2003, Adam Dunkels. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
| * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
| * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * This file is part of the Contiki desktop environment |
| * |
| * $Id: ctk-textedit.c,v 1.4 2004/09/01 18:26:55 adamdunkels Exp $ |
| * |
| */ |
| |
| |
| #include "ctk-textedit.h" |
| |
| #include <string.h> |
| |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| ctk_textedit_init(struct ctk_textedit *t) |
| { |
| t->xpos = t->ypos = 0; |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /** |
| * Add a CTK textedit widget to a window. |
| * |
| * \param w A pointer to the window to which the entry is to be added. |
| * \param t A pointer to the CTK textentry structure. |
| */ |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| ctk_textedit_add(struct ctk_window *w, |
| struct ctk_textedit *t) |
| { |
| CTK_WIDGET_SET_FLAG(t, CTK_WIDGET_FLAG_MONOSPACE); |
| CTK_WIDGET_ADD(w, t); |
| } |
| /*-----------------------------------------------------------------------------------*/ |
| /** |
| * The CTK textedit signal handler. |
| * |
| * This function must be called as part of the normal signal handler |
| * of the process that contains the CTK textentry structure. |
| * |
| * \param t A pointer to the CTK textentry structure. |
| * \param s The signal number. |
| * \param data The signal data. |
| */ |
| /*-----------------------------------------------------------------------------------*/ |
| void |
| ctk_textedit_eventhandler(struct ctk_textedit *t, |
| ek_event_t s, |
| ek_data_t data) |
| { |
| char *textptr, *textptr2; |
| unsigned char len; |
| |
| if(s == ctk_signal_keypress) { |
| CTK_WIDGET_FOCUS(t->label.window, &t->label); |
| textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]); |
| *textptr &= 0x7f; |
| switch((ctk_arch_key_t)data) { |
| case CH_CURS_DOWN: |
| if(t->ypos < t->label.h - 1) { |
| ++t->ypos; |
| } |
| break; |
| case CH_CURS_UP: |
| if(t->ypos > 0) { |
| --t->ypos; |
| } |
| break; |
| case CH_CURS_RIGHT: |
| len = strlen(&t->label.text[t->ypos * t->label.w]); |
| if(t->xpos < len) { |
| /* if(t->xpos < t->label.w) {*/ |
| ++t->xpos; |
| } else { |
| t->xpos = len; |
| } |
| break; |
| case CH_CURS_LEFT: |
| if(t->xpos > 0) { |
| --t->xpos; |
| } else { |
| if(t->ypos > 0) { |
| --t->ypos; |
| t->xpos = t->label.w - 1; |
| } |
| } |
| break; |
| case CH_ENTER: |
| t->xpos = 0; |
| if(t->ypos < t->label.h - 1) { |
| ++t->ypos; |
| } |
| break; |
| case CH_DEL: |
| len = t->label.w - t->xpos; |
| if(t->xpos > 0 && len > 0) { |
| strncpy(textptr - 1, textptr, |
| len); |
| *(textptr + len - 1) = 0; |
| --t->xpos; |
| } |
| break; |
| default: |
| len = t->label.w - t->xpos; |
| if(len > 0) { |
| textptr2 = textptr + len - 1; |
| while(textptr2 + 1 > textptr) { |
| *(textptr2 + 1) = *textptr2; |
| --textptr2; |
| } |
| |
| *textptr = (char)data; |
| ++t->xpos; |
| if(t->xpos == t->label.w) { |
| t->xpos = 0; |
| if(t->ypos < t->label.h - 1) { |
| ++t->ypos; |
| } |
| } |
| } |
| break; |
| } |
| textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]); |
| *textptr |= 0x80; |
| CTK_WIDGET_REDRAW(&t->label); |
| } else if(s == ctk_signal_widget_activate && |
| data == (ek_data_t)t) { |
| textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]); |
| *textptr &= 0x7f; |
| t->xpos = 0; |
| if(t->ypos < t->label.h - 1) { |
| ++t->ypos; |
| } |
| textptr = &(t->label.text[t->ypos * t->label.w + t->xpos]); |
| *textptr |= 0x80; |
| CTK_WIDGET_REDRAW(&t->label); |
| } |
| } |
| /*-----------------------------------------------------------------------------------*/ |