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@ -452,6 +452,75 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
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This allows you to toggle between scrolling and cursor movement by pressing the DRAG_SCROLL key.
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### Advanced Drag Scroll
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Sometimes, like with the Cirque trackpad, you will run into issues where the scrolling may be too fast.
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Here is a slightly more advanced example of drag scrolling. You will be able to change the scroll speed based on the values in set in `SCROLL_DIVISOR_H` and `SCROLL_DIVISOR_V`. This bit of code is also set up so that instead of toggling the scrolling state with set_scrolling = !set_scrolling, the set_scrolling variable is set directly to record->event.pressed. This way, the drag scrolling will only be active while the DRAG_SCROLL button is held down.
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```c
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enum custom_keycodes {
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DRAG_SCROLL = SAFE_RANGE,
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};
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bool set_scrolling = false;
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// Modify these values to adjust the scrolling speed
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#define SCROLL_DIVISOR_H 8.0
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#define SCROLL_DIVISOR_V 8.0
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// Variables to store accumulated scroll values
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float scroll_accumulated_h = 0;
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float scroll_accumulated_v = 0;
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// Function to handle mouse reports and perform drag scrolling
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report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
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// Check if drag scrolling is active
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if (set_scrolling) {
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// Calculate and accumulate scroll values based on mouse movement and divisors
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scroll_accumulated_h += (float)mouse_report.x / SCROLL_DIVISOR_H;
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scroll_accumulated_v += (float)mouse_report.y / SCROLL_DIVISOR_V;
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// Assign integer parts of accumulated scroll values to the mouse report
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mouse_report.h = (int8_t)scroll_accumulated_h;
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mouse_report.v = (int8_t)scroll_accumulated_v;
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// Update accumulated scroll values by subtracting the integer parts
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scroll_accumulated_h -= (int8_t)scroll_accumulated_h;
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scroll_accumulated_v -= (int8_t)scroll_accumulated_v;
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// Clear the X and Y values of the mouse report
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mouse_report.x = 0;
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mouse_report.y = 0;
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}
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return mouse_report;
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}
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// Function to handle key events and enable/disable drag scrolling
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bool process_record_user(uint16_t keycode, keyrecord_t *record) {
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switch (keycode) {
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case DRAG_SCROLL:
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// Toggle set_scrolling when DRAG_SCROLL key is pressed or released
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set_scrolling = record->event.pressed;
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break;
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default:
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break;
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}
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return true;
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}
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// Function to handle layer changes and disable drag scrolling when not in AUTO_MOUSE_DEFAULT_LAYER
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layer_state_t layer_state_set_user(layer_state_t state) {
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// Disable set_scrolling if the current layer is not the AUTO_MOUSE_DEFAULT_LAYER
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if (get_highest_layer(state) != AUTO_MOUSE_DEFAULT_LAYER) {
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set_scrolling = false;
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}
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return state;
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}
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```
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## Split Examples
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The following examples make use the `SPLIT_POINTING_ENABLE` functionality and show how to manipulate the mouse report for a scrolling mode.
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