mirror of
https://github.com/QuantumLeaps/qpcpp.git
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296 lines
12 KiB
C++
296 lines
12 KiB
C++
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//////////////////////////////////////////////////////////////////////////////
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// Product: UI 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 20, 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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#include <stdio.h>
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#include <math.h>
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#include <new.h> // for placement new
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class UI_num_lr_xy : public UI_num_lr { // x/y entries
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public:
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static QState x_entry(UI_num_lr_xy *me, QEvt const *e);
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static QState y_entry(UI_num_lr_xy *me, QEvt const *e);
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};
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Q_ASSERT_COMPILE(sizeof(UI_num_lr_xy) < sizeof(UI_mem));
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// Local objects -------------------------------------------------------------
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static QEvt const l_clear_evt = { C_SIG, 0 };
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#define NUM_ENTRY1_X 3
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#define NUM_ENTRY1_Y 13
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#define NUM_ENTRY2_X (NUM_ENTRY1_X + NUM_STR_WIDTH + 4)
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#define NUM_ENTRY2_Y 13
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#define NUM_ENTRY_COLOR (Video::FGND_YELLOW)
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//............................................................................
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QState UI_num_lr::handler(UI_num_lr *me, QEvt const *e) {
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switch (e->sig) {
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case Q_ENTRY_SIG: {
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uint8_t c;
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static char const * const help_lr[] = {
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"Linear Regression: ",
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"Fit the line y = a*x + b, ",
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"based on n samples (xi, yi).",
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"The coefficients a and b are",
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"calculated as follows: ",
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"a = Sxy / Sxx = ",
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" (Sum(xi*yi) ",
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" -Sum(xi)*Sum(yi)/n) ",
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" /(Sum(xi*xi)-(Sum(xi)**2/n;",
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"b = yave - a*xave = ",
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" Sum(yi)/n - a*Sum(xi)/n; "
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};
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// instantiate the state-local objects
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me->m_help_text = help_lr;
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me->m_help_len = Q_DIM(help_lr);
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me->m_n = 0.0;
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me->m_xsum = 0.0;
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me->m_xsum_sq = 0.0;
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me->m_ysum = 0.0;
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me->m_ysum_sq = 0.0;
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me->m_xysum = 0.0;
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Video::printStrAt(2, 10, Video::FGND_BLACK,
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"Screen 2: Linear Regression ");
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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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c = Video::FGND_LIGHT_GRAY;
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Video::printStrAt(36, 12, c,
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"Press '-' to enter a negative number");
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Video::printStrAt(36, 13, c,
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"Press '0' .. '9' to enter a digit");
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Video::printStrAt(36, 14, c,
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"Press '.' to enter the decimal point");
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Video::printStrAt(36, 15, c,
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"Press <Enter> to move from x to y");
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Video::printStrAt(43, 16, c,
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"and again to enter the (x, y) sample");
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Video::printStrAt(36, 17, c,
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"Press 'e' or 'E' to Cancel last entry");
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Video::printStrAt(36, 18, c,
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"Press 'c' or 'C' to Cancel the data set");
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c = Video::FGND_WHITE;
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Video::printStrAt(36, 20, c,
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"Press UP-arrow for previous screen");
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Video::printStrAt(36, 21, c,
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"Press DOWN-arrow for next screen");
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Video::printStrAt(36, 22, c,
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"Press F1 for help");
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Video::clearRect(NUM_ENTRY1_X, NUM_ENTRY1_Y,
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NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 1,
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Video::BGND_BLACK);
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Video::clearRect(NUM_ENTRY2_X, NUM_ENTRY2_Y,
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NUM_ENTRY2_X + NUM_STR_WIDTH, NUM_ENTRY2_Y + 1,
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Video::BGND_BLACK);
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me->m_num_entry.config(NUM_ENTRY1_X, NUM_ENTRY1_Y,
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NUM_ENTRY_COLOR);
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me->m_num_entry.dispatch(&l_clear_evt);
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me->m_num_entry.config(NUM_ENTRY2_X, NUM_ENTRY2_Y,
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NUM_ENTRY_COLOR);
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me->m_num_entry.dispatch(&l_clear_evt);
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c = Video::FGND_WHITE; // labels
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Video::printStrAt(NUM_ENTRY1_X - 2, NUM_ENTRY1_Y, c, "x");
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Video::printStrAt(NUM_ENTRY2_X - 2, NUM_ENTRY2_Y, c, "y");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 3,
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c, "y = a*x + b");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 5,
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c, "n =");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 6,
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c, "a =");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 7,
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c, "b =");
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c = Video::FGND_YELLOW; // values
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 5, c, "0 ");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 6, c, "N/A ");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 7, c, "N/A ");
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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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// noting to destroy
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return Q_HANDLED();
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}
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case Q_INIT_SIG: {
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// send function dictionaries for UI states...
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QS_FUN_DICTIONARY(&UI_num_lr_xy::x_entry);
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QS_FUN_DICTIONARY(&UI_num_lr_xy::y_entry);
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return Q_TRAN(&UI_num_lr_xy::x_entry);
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}
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case NEG_SIG:
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case DIGIT_0_SIG:
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case DIGIT_1_9_SIG:
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case POINT_SIG: {
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me->m_num_entry.dispatch(e); // dispatch to the number comp
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return Q_HANDLED();
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}
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case CE_SIG: {
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me->m_num_entry.dispatch(&l_clear_evt);
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return Q_HANDLED();
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}
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case C_SIG: {
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return Q_TRAN(&UI_num_lr::handler); // transition-to-self
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}
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case UP_SIG: {
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return Q_TRAN(&UI_num_sd::handler); // previous Screen
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}
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case DOWN_SIG: {
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return Q_TRAN(&UI_num_sd::handler); // next Screen
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}
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}
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return Q_SUPER(&UI_num::handler);
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}
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//............................................................................
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QState UI_num_lr_xy::x_entry(UI_num_lr_xy *me, QEvt const *e) {
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switch (e->sig) {
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case Q_ENTRY_SIG: {
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Video::clearRect(NUM_ENTRY1_X, NUM_ENTRY1_Y,
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NUM_ENTRY1_X + NUM_STR_WIDTH, NUM_ENTRY1_Y + 1,
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Video::BGND_BLACK);
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// indicate the keyboard focus
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Video::drawRect(NUM_ENTRY1_X - 1, NUM_ENTRY1_Y - 1,
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NUM_ENTRY1_X + NUM_STR_WIDTH + 1, NUM_ENTRY1_Y + 2,
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Video::FGND_WHITE, 2);
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me->m_num_entry.config(NUM_ENTRY1_X, NUM_ENTRY1_Y,
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NUM_ENTRY_COLOR);
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me->m_num_entry.dispatch(&l_clear_evt);
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return Q_HANDLED();
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}
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case Q_EXIT_SIG: {
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me->m_x = me->m_num_entry.get();
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// remove the keyboard focus
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Video::drawRect(NUM_ENTRY1_X - 1, NUM_ENTRY1_Y - 1,
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NUM_ENTRY1_X + NUM_STR_WIDTH + 1, NUM_ENTRY1_Y + 2,
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Video::FGND_WHITE, 0);
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return Q_HANDLED();
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}
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case ENTER_SIG: {
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return Q_TRAN(&UI_num_lr_xy::y_entry);
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}
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}
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return Q_SUPER(&UI_num_lr::handler);
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}
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//............................................................................
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QState UI_num_lr_xy::y_entry(UI_num_lr_xy *me, QEvt const *e) {
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switch (e->sig) {
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case Q_ENTRY_SIG: {
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Video::clearRect(NUM_ENTRY2_X, NUM_ENTRY2_Y,
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NUM_ENTRY2_X + NUM_STR_WIDTH, NUM_ENTRY2_Y + 1,
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Video::BGND_BLACK);
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// indicate the keyboard focus
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Video::drawRect(NUM_ENTRY2_X - 1, NUM_ENTRY2_Y - 1,
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NUM_ENTRY2_X + NUM_STR_WIDTH + 1, NUM_ENTRY2_Y + 2,
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Video::FGND_WHITE, 2);
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me->m_num_entry.config(NUM_ENTRY2_X, NUM_ENTRY2_Y,
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NUM_ENTRY_COLOR);
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me->m_num_entry.dispatch(&l_clear_evt);
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return Q_HANDLED();
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}
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case Q_EXIT_SIG: {
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me->m_num_entry.dispatch(&l_clear_evt);
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// remove the keyboard focus
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Video::drawRect(NUM_ENTRY2_X - 1, NUM_ENTRY2_Y - 1,
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NUM_ENTRY2_X + NUM_STR_WIDTH + 1, NUM_ENTRY2_Y + 2,
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Video::FGND_WHITE, 0);
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return Q_HANDLED();
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}
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case CE_SIG: {
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return Q_TRAN(&UI_num_lr_xy::x_entry);
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}
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case ENTER_SIG: {
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double tmp = me->m_num_entry.get(); // y
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char buf[14];
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me->m_n += 1.0;
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me->m_xsum += me->m_x;
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me->m_ysum += tmp;
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me->m_xsum_sq += me->m_x*me->m_x;
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me->m_ysum_sq += tmp*tmp;
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me->m_xysum += me->m_x*tmp;
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sprintf(buf, "%-12.6g", me->m_n); // n
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 5, Video::FGND_YELLOW, buf);
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tmp = me->m_xsum_sq - me->m_xsum * me->m_xsum / me->m_n;
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if ((tmp < -0.0000001) || (0.0000001 < tmp)) {
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double a = (me->m_xysum - me->m_xsum * me->m_ysum / me->m_n)
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/ tmp;
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double b = (me->m_ysum - a * me->m_xsum) / me->m_n;
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sprintf(buf, "%-12.6g", a);
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 6, Video::FGND_YELLOW, buf);
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sprintf(buf, "%-12.6g", b);
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 7, Video::FGND_YELLOW, buf);
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}
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else {
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 6, Video::FGND_YELLOW, "N/A ");
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Video::printStrAt(NUM_ENTRY1_X + NUM_STR_WIDTH + 5,
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NUM_ENTRY1_Y + 7, Video::FGND_YELLOW, "N/A ");
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}
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return Q_TRAN(&UI_num_lr_xy::x_entry);
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}
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}
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return Q_SUPER(&UI_num_lr::handler);
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}
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