portapack-mayhem/firmware/application/ui_handwrite.cpp
2017-03-12 07:09:22 +00:00

407 lines
9.3 KiB
C++

/*
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
* Copyright (C) 2016 Furrtek
*
* This file is part of PortaPack.
*
* 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, 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "ui_handwrite.hpp"
#include "portapack.hpp"
#include "hackrf_hal.hpp"
#include "portapack_shared_memory.hpp"
#include <cstring>
using namespace portapack;
namespace ui {
void HandWriteView::paint(Painter& painter) {
_painter = &painter;
}
HandWriteView::HandWriteView(
NavigationView& nav,
char txt[],
size_t max_length
) : _max_length(max_length)
{
const char special_chars[5] = {'\'', '.', '?', '!', '='};
size_t n;
// Handwriting alphabet definition here
handwriting = &handwriting_unistroke;
txtidx = strlen(txt);
memcpy(txtinput, txt, _max_length + 1);
n = txtidx;
while (n && (txtinput[n - 1] == ' ')) {
txtinput[--n] = 0;
txtidx--;
}
add_children({
&text_input,
&button_case,
&button_ok
});
const auto button_fn = [this](Button& button) {
this->on_button(button);
};
n = 0;
for (auto& button : num_buttons) {
add_child(&button);
button.on_select = button_fn;
button.set_parent_rect({
static_cast<Coord>(n * 24),
static_cast<Coord>(236),
24, 28
});
const std::string label {
(char)(n + '0')
};
button.set_text(label);
button.id = n + '0';
n++;
}
n = 0;
for (auto& button : special_buttons) {
add_child(&button);
button.on_select = button_fn;
button.set_parent_rect({
static_cast<Coord>(50 + n * 24),
static_cast<Coord>(270),
24, 28
});
const std::string label {
(char)(special_chars[n])
};
button.set_text(label);
button.id = special_chars[n];
n++;
}
button_case.on_select = [this, &nav](Button&) {
if (_lowercase == true) {
_lowercase = false;
button_case.set_text("LC");
} else {
_lowercase = true;
button_case.set_text("UC");
}
};
button_ok.on_select = [this, &nav, txt, max_length](Button&) {
memcpy(txt, txtinput, max_length + 1);
if (on_changed) on_changed(this->value());
nav.pop();
};
update_text();
}
bool HandWriteView::on_touch(const TouchEvent event) {
if (event.type == ui::TouchEvent::Type::Start) {
stroke_index = 0;
move_wait = 3;
tracing = true;
}
if (event.type == ui::TouchEvent::Type::End) {
tracing = false;
guess_letter();
}
if (event.type == ui::TouchEvent::Type::Move) {
if (tracing)
current_pos = event.point;
}
return true;
}
void HandWriteView::clear_zone(const Color color, const bool flash) {
display.fill_rectangle(
{{0, 32}, {240, 216}},
color
);
if (flash) {
flash_timer = 8;
} else {
// Draw grid
_painter->draw_rectangle(
{{0, 32}, {80, 216}},
Color::grey()
);
_painter->draw_rectangle(
{{80, 32}, {80, 216}},
Color::grey()
);
_painter->draw_rectangle(
{{160, 32}, {80, 216}},
Color::grey()
);
_painter->draw_rectangle(
{{0, 104}, {240, 72}},
Color::grey()
);
}
}
void HandWriteView::guess_letter() {
uint32_t symbol, match, count, stroke_idx, stroke_data;
Condition cond;
Direction dir;
bool matched;
// Letter guessing
if (stroke_index) {
for (symbol = 0; symbol < handwriting->letter_count; symbol++) {
count = handwriting->letter[symbol].count;
matched = false;
if (count) {
// We have a count match to do
if ((count == 1) && (stroke_index == 1)) matched = true;
if ((count == 2) && (stroke_index == 2)) matched = true;
if ((count == 3) && (stroke_index > 2)) matched = true;
} else {
matched = true;
}
if (matched) {
for (match = 0; match < 3; match++) {
cond = handwriting->letter[symbol].match[match].cond;
dir = handwriting->letter[symbol].match[match].dir;
if ((cond != cond_empty) && (dir != dir_empty)) {
if (cond == last) {
if (stroke_index)
stroke_idx = stroke_index - 1;
else
stroke_idx = 0;
} else if (cond == stroke_a)
stroke_idx = 0;
else if (cond == stroke_b)
stroke_idx = 1;
else if (cond == stroke_c)
stroke_idx = 2;
else
stroke_idx = 3;
if (stroke_idx >= stroke_index) break;
stroke_data = stroke_list[stroke_idx];
if ((dir & 0xF0) == 0xF0) {
if ((dir & 0x0F) != (stroke_data & 0x0F)) break;
} else if ((dir & 0x0F) == 0x0F) {
if ((dir & 0xF0) != (stroke_data & 0xF0)) break;
} else {
if (dir != (int32_t)stroke_data) break;
}
}
}
if (match == 3)
break;
else
matched = false;
}
}
if (matched) {
if (symbol) {
if (_lowercase)
char_add('a' + symbol - 1);
else
char_add('A' + symbol - 1);
clear_zone(Color::green(), true); // Green flash
} else {
if (txtidx) {
txtidx--;
txtinput[txtidx] = 0; // Erase
clear_zone(Color::yellow(), true); // Yellow flash
} else {
clear_zone(Color::red(), true); // Red flash
}
}
} else {
clear_zone(Color::red(), true); // Red flash
}
} else {
// Short tap is space
char_add(' ');
clear_zone(Color::green(), true); // Green flash
}
update_text();
stroke_index = 0;
}
void HandWriteView::add_stroke(uint8_t dir) {
if (stroke_index < 8) {
stroke_list[stroke_index] = dir;
stroke_index++;
} else {
guess_letter();
}
}
void HandWriteView::sample_pen() {
int16_t diff_x, diff_y;
uint8_t dir, dir_ud, dir_lr, stroke_prev;
// Blink cursor
if (!(sample_skip & 15)) {
Point cursor_pos;
cursor_pos = {text_input.screen_rect().location().x() + (txtidx * 8),
text_input.screen_rect().location().y() + 16 - 4};
if (cursor) {
display.fill_rectangle(
{cursor_pos, {text_input.screen_rect().size().width() - cursor_pos.x(), 4}},
Color::black()
);
} else {
display.fill_rectangle(
{cursor_pos, {8, 4}},
Color::white()
);
}
cursor = !cursor;
}
if (flash_timer) {
if (flash_timer == 1) clear_zone(Color::black(), false);
flash_timer--;
}
if (!(sample_skip & 1)) {
if (tracing) {
if (move_wait) {
move_wait--; // ~100ms delay to get rid of jitter from touch start
} else {
diff_x = current_pos.x() - last_pos.x();
diff_y = current_pos.y() - last_pos.y();
if (current_pos.y() <= 240) {
display.fill_rectangle(
{{current_pos.x(), current_pos.y()}, {4, 4}},
Color::grey()
);
}
dir = 0; // UL by default
if (abs(diff_x) > 7) {
if (diff_x > 0)
dir |= 0x01; // R
} else {
dir |= 0x02; // ?
}
if (abs(diff_y) > 7) {
if (diff_y > 0)
dir |= 0x10; // D
} else {
dir |= 0x20; // ?
}
// Need at least two identical directions to validate stroke
if ((dir & 0x11) == (dir_prev & 0x11))
dir_cnt++;
else
dir_cnt = 0;
dir_prev = dir;
if (dir_cnt > 1) {
dir_cnt = 0;
if (stroke_index) {
if ((stroke_list[stroke_index - 1] != dir) && (dir != 0x22)) {
// Register stroke if different from last one
dir_ud = (dir & 0xF0);
dir_lr = (dir & 0x0F);
stroke_prev = stroke_list[stroke_index - 1];
if (dir_ud == 0x20) {
// LR changed
if ((stroke_prev & 0x0F) != dir_lr) add_stroke(dir);
} else if (dir_lr == 0x02) {
// UD changed
if ((stroke_prev & 0xF0) != dir_ud) add_stroke(dir);
} else {
// Add direction
if (((stroke_prev & 0xF0) == 0x20) && (dir_ud != 0x20)) {
// Add UD
if ((stroke_prev & 0x0F) == dir_lr) {
// Replace totally
stroke_list[stroke_index - 1] = dir;
} else if (dir_lr == 0x02) {
// Merge UD
stroke_list[stroke_index - 1] = dir_ud | (stroke_prev & 0x0F);
} else {
add_stroke(dir);
}
} else if (((stroke_prev & 0x0F) == 0x02) && (dir_lr != 0x02)) {
// Add LR
if ((stroke_prev & 0xF0) == dir_ud) {
// Replace totally
stroke_list[stroke_index - 1] = dir;
} else if (dir_ud == 0x20) {
// Merge LR
stroke_list[stroke_index - 1] = dir_lr | (stroke_prev & 0xF0);
} else {
add_stroke(dir);
}
} else {
add_stroke(dir);
}
}
}
} else {
// Register first stroke
if (dir != 0x22) add_stroke(dir);
}
}
}
last_pos = current_pos;
}
}
sample_skip++;
}
void HandWriteView::on_show() {
clear_zone(Color::black(), false);
}
char * HandWriteView::value() {
txtinput[txtidx] = 0;
return txtinput;
}
void HandWriteView::on_button(Button& button) {
char_add(button.id);
update_text();
}
void HandWriteView::char_add(const char c) {
if (txtidx >= _max_length) return;
txtinput[txtidx] = c;
txtidx++;
}
void HandWriteView::update_text() {
text_input.set(txtinput);
}
}