qmk_firmware/keyboards/ploopyco/trackball_mini/keymaps/drag_scroll/keymap.c

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/* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
* Copyright 2019 Sunjun Kim
* Copyright 2020 Ploopy Corporation
*
* 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 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
// used for tracking the state
bool is_drag_scroll = false;
enum custom_keycodes {
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DRAG_SCROLL = SAFE_RANGE,
};
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case DRAG_SCROLL:
if (record->event.pressed) {
// this toggles the state each time you tap it
is_drag_scroll ^= 1;
}
break;
}
return true;
}
// The real magic is here.
// This function is called to translate the processed sensor movement
// from the mouse sensor and translates it into x and y movement for
// the mouse report. Normally. So if "drag scroll" is toggled on,
// moving the ball scrolls instead. You could remove the x or y here
// to only scroll in one direction, if you wanted, as well. In fact,
// there is no reason that you need to send this to the mouse report.
// You could have it register a key, instead.
void process_mouse_user(report_mouse_t* mouse_report, int8_t x, int8_t y) {
if (is_drag_scroll) {
mouse_report->h = x;
mouse_report->v = y;
} else {
mouse_report->x = x;
mouse_report->y = y;
}
}
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = LAYOUT( /* Base */
KC_BTN1, KC_BTN3, KC_BTN2,
KC_BTN4, LT(1, KC_BTN5)
),
[1] = LAYOUT(
DRAG_SCROLL, _______, _______,
_______, _______
)
};