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-rw-r--r--keyboards/ploopyco/trackball_mini/keymaps/drag_scroll/keymap.c66
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diff --git a/keyboards/ploopyco/trackball_mini/keymaps/drag_scroll/keymap.c b/keyboards/ploopyco/trackball_mini/keymaps/drag_scroll/keymap.c
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+++ b/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 {
+ DRAG_SCROLL = PLOOPY_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, int16_t x, int16_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, _______, _______,
+ _______, _______
+ )
+};