Eww + TouchDevice (Touchscreen) Focus Monitor

[ZenyAization]

When using an additional monitor with a touchscreen and Eww widgets for Hyprland control, touch input correctly focuses the corresponding monitor, but Eww widgets don't respond to the touch. The monitor receives focus, but Eww elements don't activate. My workaround script forces focus before processing the touch, but this is an inelegant solution.
Current Workaround

#!/bin/bash

TOUCH_DEVICE="/dev/input/event2"

# Touchscreen parameters (from evtest)
TOUCH_MAX_X=2048
TOUCH_MAX_Y=2048

# Monitor DP-3 parameters
MONITOR_X=3440    # monitor starting position
MONITOR_Y=840
MONITOR_WIDTH=1024
MONITOR_HEIGHT=600

process_touch_event() {
    local line="$1"

    # Look for touch events and coordinates
    if echo "$line" | grep -q "ABS_MT_POSITION_X.*value"; then
        touch_x=$(echo "$line" | grep -o "value [0-9]*" | cut -d' ' -f2)
    fi

    if echo "$line" | grep -q "ABS_MT_POSITION_Y.*value"; then
        touch_y=$(echo "$line" | grep -o "value [0-9]*" | cut -d' ' -f2)
    fi

    if echo "$line" | grep -q "BTN_TOUCH.*value 1"; then
        if [ -n "$touch_x" ] && [ -n "$touch_y" ]; then
            # Convert touchscreen coordinates to screen coordinates
            screen_x=$(( MONITOR_X + (touch_x * MONITOR_WIDTH / TOUCH_MAX_X) ))
            screen_y=$(( MONITOR_Y + (touch_y * MONITOR_HEIGHT / TOUCH_MAX_Y) ))

            # Focus the monitor and move cursor
            hyprctl dispatch focusmonitor "DP-3"

        fi
    fi
}

# Start evtest and process events in real-time
sudo evtest "$TOUCH_DEVICE" | while read -r line; do
    process_touch_event "$line"
done

video5463046655022499424.mp4

How the Current Script Works:
Device Data Collection: Uses /dev/input/event2 as the touchscreen device
Event Monitoring: Reads raw events through evtest
Coordinate Parsing: Extracts X/Y coordinates from ABS_MT_POSITION events
Touch Detection: Identifies the moment of physical touch (BTN_TOUCH value 1)
Coordinate Conversion: Converts touchscreen coordinates to screen coordinates
Monitor Focusing: Executes hyprctl dispatch focusmonitor "DP-3"

The Issue
The script successfully focuses the monitor but does not simulate a second touch event, requiring users to double-tap for activation.
Discussion Points:
Are there built-in Hyprland solutions for touch-based focus management?
Can Eww be configured to automatically switch focus?
Is there a better way to handle touchscreen events (libinput instead of evtest)?
How to properly simulate a follow-up touch after focus change?
Are there Hyprland configuration parameters for binding input devices to specific monitors?

[Sadles1]

I did it like this. After changing monitor focus, the cursor is moves to the calculated touch position, simulates a click, and returns to its original saved position

#!/bin/bash
TOUCH_DEVICE="/dev/input/event10"

# Touchscreen parameters
TOUCH_MAX_X=9600
TOUCH_MAX_Y=9600

# Monitor DP-5 parameters
MONITOR_X=0         # monitor starting position
MONITOR_Y=2560
MONITOR_WIDTH=682
MONITOR_HEIGHT=2560

process_touch_event() {
    if echo "$line" | grep -q "ABS_MT_POSITION_X.*value"; then
        touch_x=$(echo "$line" | grep -o "value [0-9]*" | cut -d' ' -f2)
    fi

    if echo "$line" | grep -q "ABS_MT_POSITION_Y.*value"; then
        touch_y=$(echo "$line" | grep -o "value [0-9]*" | cut -d' ' -f2)
    fi

    if echo "$line" | grep -q "BTN_TOUCH.*value 1"; then
        if [ -n "$touch_x" ] && [ -n "$touch_y" ]; then
            local_x=$(( touch_y * MONITOR_WIDTH / TOUCH_MAX_Y ))
            local_y=$(( (TOUCH_MAX_X - touch_x) * MONITOR_HEIGHT / TOUCH_MAX_X ))
            
            screen_x=$(( MONITOR_X + local_x ))
            screen_y=$(( MONITOR_Y + local_y ))

            echo "Touch: x=$touch_x y=$touch_y -> Screen: x=$screen_x y=$screen_y"

            cursor_pos=$(hyprctl cursorpos)
            saved_x=$(echo "$cursor_pos" | cut -d',' -f1)
            saved_y=$(echo "$cursor_pos" | cut -d',' -f2)
            
            hyprctl dispatch focusmonitor "DP-5"
            
            hyprctl dispatch movecursor $screen_x $screen_y
            sleep 0.05
            ydotool click 0xC0
            sleep 0.05
            
            hyprctl dispatch movecursor $saved_x $saved_y
        fi
    fi
}

sudo evtest "$TOUCH_DEVICE" | while read -r line; do
    process_touch_event "$line"
done

[ZenyAization]

Thank you very much for your help! Your approach of saving and restoring the cursor position is elegant.
I adapted your script to my configuration. I needed to:
Restore the original parameters of my touchscreen (2048x2048) and DP-3 monitor (3440x840, 1024x600)
Remove the coordinate transformation, since my X/Y axes are not inverted.
Keep the logic for saving and restoring the cursor position intact – that turned out to be very convenient!
Now the touchscreen works perfectly – tapping moves the cursor to the desired location on the monitor, clicks, and then returns. Just what I needed.

Thanks again for your help!

[Golim]

It's fixed in 0.55 (see here), no need for bash scripts anymore