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106 lines
4.0 KiB
C
106 lines
4.0 KiB
C
/*****************************************************************************
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* Product: User Interface with State-Local Storage Example
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* Last Updated for Version: 4.5.00
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* Date of the Last Update: May 18, 2012
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*
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* Q u a n t u m L e a P s
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* ---------------------------
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* innovating embedded systems
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*
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* Copyright (C) 2002-2012 Quantum Leaps, LLC. All rights reserved.
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*
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* This program is open source software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* Alternatively, this program may be distributed and modified under the
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* terms of Quantum Leaps commercial licenses, which expressly supersede
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* the GNU General Public License and are specifically designed for
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* licensees interested in retaining the proprietary status of their code.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Contact information:
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* Quantum Leaps Web sites: http://www.quantum-leaps.com
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* http://www.state-machine.com
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* e-mail: info@quantum-leaps.com
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*****************************************************************************/
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#include "qp_port.h" /* the port of the QP framework */
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#include "num_ent.h"
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#include "ui.h"
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#include "video.h"
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#define HELP_X 3
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#define HELP_Y 14
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#define HELP_DX 28
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#define HELP_DY 5
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/*..........................................................................*/
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static void printHelp(char const * const *txt) {
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uint8_t y;
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for (y = 0; y < HELP_DY; ++y) {
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Video_printStrAt(HELP_X, HELP_Y + y, VIDEO_FGND_YELLOW, txt[y]);
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}
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}
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/*..........................................................................*/
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QState UI_help_handler(UI_help *me, QEvt const *e) {
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switch (e->sig) {
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case Q_ENTRY_SIG: {
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/* instantiate the state-local objects */
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Video_printStrAt(2, 10, VIDEO_FGND_BLACK,
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"Screen 0: Help ");
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Video_clearRect( 0, 11, 35, 23, VIDEO_BGND_BLUE);
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Video_clearRect(35, 11, 80, 23, VIDEO_BGND_BLACK);
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Video_printStrAt(36, 12, VIDEO_FGND_LIGHT_GRAY,
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"Press DOWN-Arrow to scroll down");
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Video_printStrAt(36, 13, VIDEO_FGND_LIGHT_GRAY,
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"Press UP-Arrow to scroll up");
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Video_printStrAt(36, 20, VIDEO_FGND_WHITE,
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"Press F1 to return to last screen");
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Video_clearRect(HELP_X - 1, HELP_Y,
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HELP_X + HELP_DX + 1, HELP_Y + HELP_DY, VIDEO_BGND_BLACK);
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Video_drawRect (HELP_X - 2, HELP_Y - 1,
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HELP_X + HELP_DX + 2, HELP_Y + HELP_DY + 1,
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VIDEO_FGND_WHITE,2);
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me->help_line = 0;
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printHelp(me->super.help_text + me->help_line);
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return Q_HANDLED();
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}
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case Q_EXIT_SIG: {
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/* destroy the state-local objects... */
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return Q_HANDLED();
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}
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case DOWN_SIG: {
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if (me->help_line + HELP_DY < me->super.help_len) {
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++me->help_line;
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}
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printHelp(me->super.help_text + me->help_line);
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return Q_HANDLED();
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}
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case UP_SIG: {
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if (me->help_line > 0) {
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--me->help_line;
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}
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printHelp(me->super.help_text + me->help_line);
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return Q_HANDLED();
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}
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case HELP_SIG: {
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return Q_TRAN(me->super.history); /* go back to the last screen */
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}
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}
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return Q_SUPER(&UI_top_handler);
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}
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