Writing script to bind keys to increment / decrement a window's opacity float value by 0.1

[enoren5]

Greetings!

I am trying to write a script for Hyprland to increase and decrease the opacity of a focused window. When I trigger the key combination of SUPER_SHIFT + P`, I am expecting Hyprland to decrement the opacity by 10% but instead nothing happens. Sway has this feature out of box and I don't see a similar way to do this with Hyprland. The official Hyprland docs are exhaustive and go into great detail about how to play with opacity, but I don't see a way to bind a key combination to increase/decrease opacity values as easily and straightforward as Sway. To this end I have a bash script where I attempt to emulate this feature.

Below you can find (and in this order):

1. A snippet from my hyprland.conf where I declare the keybindings.
2. The latest version and best attempt at a bash script.
3. An ad-hoc log file.

Here are the bindings inside my hyprland.conf:

bind = SHIFT_SUPER, O, exec, ~/dev/opacity.sh --increase
bind = SHIFT_SUPER, P, exec, ~/dev/opacity.sh --decrease

My latest opacity.sh:

#!/usr/bin/env bash

# A script to increase or decrease the active window opacity in Hyprland

LOG_FILE="/tmp/hypr_opacity_script_v7_revisited.log"
# Replace with the actual paths found using 'which jq', 'which hyprctl', and 'which bc'
JQ_PATH="/run/current-system/sw/bin/jq" # <-- Update this path if needed
HYPRCTL_PATH="/run/current-system/sw/bin/hyprctl" # <-- Update this path if needed
BC_PATH="/run/current-system/sw/bin/bc" # <-- Update this path if needed

# Function to log messages
log_message() {
  echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$LOG_FILE"
}

log_message "Script started (v7 revisited)"

# Add a small delay to ensure Hyprland is ready
sleep 0.05 # Adjust delay if necessary

OPACITY_STEP=0.1
MIN_OPACITY=0.0
MAX_OPACITY=1.0

# Get the direction from argument
DIRECTION="$1"
log_message "Direction argument: $DIRECTION"

if [[ "$DIRECTION" != "--increase" && "$DIRECTION" != "--decrease" ]]; then
  log_message "Invalid direction argument. Usage: $0 --increase|--decrease"
  echo "Usage: $0 --increase|--decrease" >> "$LOG_FILE"
  exit 1
fi

# Get the address of the active window
ACTIVE_WINDOW_ADDRESS=$(${HYPRCTL_PATH} activewindow -j | ${JQ_PATH} -r '.address')

# Check if we got a valid address
if [[ -z "$ACTIVE_WINDOW_ADDRESS" || "$ACTIVE_WINDOW_ADDRESS" == "null" ]]; then
  log_message "Could not get active window address. hyprctl output: $(${HYPRCTL_PATH} activewindow -j)"
  echo "Could not get active window address." >> "$LOG_FILE"
  exit 1
fi
log_message "Active window address: $ACTIVE_WINDOW_ADDRESS"

# Get the current GLOBAL active opacity using getoption
GETOPTION_OUTPUT=$(${HYPRCTL_PATH} getoption decoration:active_opacity -j 2>&1) # Capture stderr too
log_message "hyprctl getoption decoration:active_opacity output: $GETOPTION_OUTPUT"

# Parse the global opacity value
CURRENT_GLOBAL_OPACITY=$(echo "$GETOPTION_OUTPUT" | ${JQ_PATH} -r '.float' 2>/dev/null)

# Fallback if jq failed or parsed value is null/empty
if [[ -z "$CURRENT_GLOBAL_OPACITY" || "$CURRENT_GLOBAL_OPACITY" == "null" ]]; then
  log_message "Failed to parse global active opacity from getoption output: '$GETOPTION_OUTPUT'. Assuming 1.0."
  CURRENT_GLOBAL_OPACITY=1.0
else
  log_message "Current global active opacity: $CURRENT_GLOBAL_OPACITY"
fi

# Use the CURRENT_GLOBAL_OPACITY as the base for calculation
# The setprop opacity acts as a multiplier on this base.
# By setting the multiplier to the desired final opacity, we achieve the effect.
CURRENT_WINDOW_OPACITY_AS_BASE="$CURRENT_GLOBAL_OPACITY"
log_message "Using global opacity ($CURRENT_WINDOW_OPACITY_AS_BASE) as base for window opacity calculation."

# Adjust desired opacity for the window
if [[ "$DIRECTION" == "--increase" ]]; then
  # Increasing opacity means increasing the value towards 1.0
  NEW_DESIRED_OPACITY=$(echo "$CURRENT_WINDOW_OPACITY_AS_BASE + $OPACITY_STEP" | ${BC_PATH})
  COMPARE=$(echo "$NEW_DESIRED_OPACITY > $MAX_OPACITY" | ${BC_PATH})
  if [[ "$COMPARE" -eq 1 ]]; then
    NEW_DESIRED_OPACITY=$MAX_OPACITY
  fi
  log_message "Increasing desired opacity. New desired opacity (before clamp): $NEW_DESIRED_OPACITY"
else
  # Decreasing opacity means decreasing the value towards 0.0
  NEW_DESIRED_OPACITY=$(echo "$CURRENT_WINDOW_OPACITY_AS_BASE - $OPACITY_STEP" | ${BC_PATH})
  COMPARE=$(echo "$NEW_DESIRED_OPACITY < $MIN_OPACITY" | ${BC_PATH})
  if [[ "$COMPARE" -eq 1 ]]; then
    NEW_DESIRED_OPACITY=$MIN_OPACITY
  fi
  log_message "Decreasing desired opacity. New desired opacity (before clamp): $NEW_DESIRED_OPACITY"
fi

# Format new desired opacity
# Use printf with a high precision to avoid scientific notation, then remove trailing zeros and decimal if integer
NEW_DESIRED_OPACITY=$(printf "%.10f" "$NEW_DESIRED_OPACITY" | sed 's/\.\?0*$//')
# If the result is just a decimal point, remove it
NEW_DESIRED_OPACITY=$(echo "$NEW_DESIRED_OPACITY" | sed 's/^\.$//')
# If the result is empty (e.g., from 0.0), set it to 0
if [[ -z "$NEW_DESIRED_OPACITY" ]]; then
  NEW_DESIRED_OPACITY="0"
fi

log_message "Calculated new desired window opacity (after clamp and format): $NEW_DESIRED_OPACITY"

# Set the calculated desired opacity as the multiplier for the active window
${HYPRCTL_PATH} dispatch setprop address:"$ACTIVE_WINDOW_ADDRESS" opacity "$NEW_DESIRED_OPACITY"
if [ $? -eq 0 ]; then
  log_message "Successfully set opacity multiplier to $NEW_DESIRED_OPACITY for $ACTIVE_WINDOW_ADDRESS"
else
  log_message "Failed to set opacity multiplier to $NEW_DESIRED_OPACITY for $ACTIVE_WINDOW_ADDRESS. hyprctl dispatch setprop exit code: $?"
  log_message "hyprctl dispatch setprop final output: $(${HYPRCTL_PATH} dispatch setprop address:"$ACTIVE_WINDOW_ADDRESS" opacity "$NEW_DESIRED_OPACITY" 2>&1)"
fi

log_message "Script finished (v7 revisited)"

Here is the log file:

2025-06-10 04:02:12 - Script started (v7 revisited)
2025-06-10 04:02:13 - Direction argument: --decrease
2025-06-10 04:02:13 - Active window address: 0x134edcc0
2025-06-10 04:02:13 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:13 - Current global active opacity: 1.000000
2025-06-10 04:02:13 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:13 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:13 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:13 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:13 - Script finished (v7 revisited)
2025-06-10 04:02:13 - Script started (v7 revisited)
2025-06-10 04:02:13 - Direction argument: --decrease
2025-06-10 04:02:13 - Active window address: 0x134edcc0
2025-06-10 04:02:13 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:13 - Current global active opacity: 1.000000
2025-06-10 04:02:13 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:13 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:13 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:13 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:13 - Script finished (v7 revisited)
2025-06-10 04:02:13 - Script started (v7 revisited)
2025-06-10 04:02:13 - Direction argument: --decrease
2025-06-10 04:02:13 - Active window address: 0x134edcc0
2025-06-10 04:02:13 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:13 - Current global active opacity: 1.000000
2025-06-10 04:02:13 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:13 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:13 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:13 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:13 - Script finished (v7 revisited)
2025-06-10 04:02:13 - Script started (v7 revisited)
2025-06-10 04:02:13 - Direction argument: --decrease
2025-06-10 04:02:13 - Active window address: 0x134edcc0
2025-06-10 04:02:13 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:13 - Current global active opacity: 1.000000
2025-06-10 04:02:13 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:13 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:13 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:13 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:13 - Script finished (v7 revisited)
2025-06-10 04:02:13 - Script started (v7 revisited)
2025-06-10 04:02:13 - Direction argument: --decrease
2025-06-10 04:02:13 - Active window address: 0x134edcc0
2025-06-10 04:02:13 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:13 - Current global active opacity: 1.000000
2025-06-10 04:02:13 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:13 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:13 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:13 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:13 - Script finished (v7 revisited)
2025-06-10 04:02:14 - Script started (v7 revisited)
2025-06-10 04:02:14 - Direction argument: --decrease
2025-06-10 04:02:14 - Active window address: 0x134edcc0
2025-06-10 04:02:14 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:14 - Current global active opacity: 1.000000
2025-06-10 04:02:14 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:14 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:14 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:14 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:14 - Script finished (v7 revisited)
2025-06-10 04:02:14 - Script started (v7 revisited)
2025-06-10 04:02:14 - Direction argument: --decrease
2025-06-10 04:02:14 - Active window address: 0x134edcc0
2025-06-10 04:02:14 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:14 - Current global active opacity: 1.000000
2025-06-10 04:02:14 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:14 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:14 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:14 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:14 - Script finished (v7 revisited)
2025-06-10 04:02:14 - Script started (v7 revisited)
2025-06-10 04:02:14 - Direction argument: --decrease
2025-06-10 04:02:14 - Active window address: 0x134edcc0
2025-06-10 04:02:14 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:14 - Current global active opacity: 1.000000
2025-06-10 04:02:14 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:14 - Decreasing desired opacity. New desired opacity (before clamp): .900000
2025-06-10 04:02:14 - Calculated new desired window opacity (after clamp and format): 0.9
2025-06-10 04:02:14 - Successfully set opacity multiplier to 0.9 for 0x134edcc0
2025-06-10 04:02:14 - Script finished (v7 revisited)
2025-06-10 04:02:15 - Script started (v7 revisited)
2025-06-10 04:02:15 - Direction argument: --increase
2025-06-10 04:02:15 - Active window address: 0x134edcc0
2025-06-10 04:02:15 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:15 - Current global active opacity: 1.000000
2025-06-10 04:02:15 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:15 - Increasing desired opacity. New desired opacity (before clamp): 1.0
2025-06-10 04:02:15 - Calculated new desired window opacity (after clamp and format): 1
2025-06-10 04:02:15 - Successfully set opacity multiplier to 1 for 0x134edcc0
2025-06-10 04:02:15 - Script finished (v7 revisited)
2025-06-10 04:02:15 - Script started (v7 revisited)
2025-06-10 04:02:15 - Direction argument: --increase
2025-06-10 04:02:15 - Active window address: 0x134edcc0
2025-06-10 04:02:15 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:15 - Current global active opacity: 1.000000
2025-06-10 04:02:15 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:15 - Increasing desired opacity. New desired opacity (before clamp): 1.0
2025-06-10 04:02:15 - Calculated new desired window opacity (after clamp and format): 1
2025-06-10 04:02:15 - Successfully set opacity multiplier to 1 for 0x134edcc0
2025-06-10 04:02:15 - Script finished (v7 revisited)
2025-06-10 04:02:15 - Script started (v7 revisited)
2025-06-10 04:02:15 - Direction argument: --increase
2025-06-10 04:02:15 - Active window address: 0x134edcc0
2025-06-10 04:02:15 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:15 - Current global active opacity: 1.000000
2025-06-10 04:02:15 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:15 - Increasing desired opacity. New desired opacity (before clamp): 1.0
2025-06-10 04:02:15 - Calculated new desired window opacity (after clamp and format): 1
2025-06-10 04:02:15 - Successfully set opacity multiplier to 1 for 0x134edcc0
2025-06-10 04:02:15 - Script finished (v7 revisited)
2025-06-10 04:02:15 - Script started (v7 revisited)
2025-06-10 04:02:15 - Direction argument: --increase
2025-06-10 04:02:15 - Active window address: 0x134edcc0
2025-06-10 04:02:15 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:15 - Current global active opacity: 1.000000
2025-06-10 04:02:15 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:15 - Increasing desired opacity. New desired opacity (before clamp): 1.0
2025-06-10 04:02:15 - Calculated new desired window opacity (after clamp and format): 1
2025-06-10 04:02:15 - Successfully set opacity multiplier to 1 for 0x134edcc0
2025-06-10 04:02:15 - Script finished (v7 revisited)
2025-06-10 04:02:15 - Script started (v7 revisited)
2025-06-10 04:02:15 - Direction argument: --increase
2025-06-10 04:02:15 - Active window address: 0x134edcc0
2025-06-10 04:02:15 - hyprctl getoption decoration:active_opacity output: {"option": "decoration:active_opacity", "float": 1.000000, "set": true }
2025-06-10 04:02:15 - Current global active opacity: 1.000000
2025-06-10 04:02:15 - Using global opacity (1.000000) as base for window opacity calculation.
2025-06-10 04:02:15 - Increasing desired opacity. New desired opacity (before clamp): 1.0
2025-06-10 04:02:15 - Calculated new desired window opacity (after clamp and format): 1
2025-06-10 04:02:15 - Successfully set opacity multiplier to 1 for 0x134edcc0
2025-06-10 04:02:15 - Script finished (v7 revisited)

[vaxerski]

script is very hard to read with those fuckin comments but as far as I can see what you are doing is

• get global: 1
• setprop 1 - 0.1 (eg) = 0.9

setprop doesnt change global, so you'll always have the same

[enoren5]

@vaxerski! Thank you for taking the time to read my script and provide feedback. I took an axe to it and re-wrote it from scratch. I have since made quite a bit of progress but I am not quite where I want to be.

You said:

setprop doesnt change global, so you'll always have the same

I only partially understand. I do not want to change the global property values of all windows. Perhaps you could elaborate a litle bit further?

In my new script below, I setprop the active window to, say, 0.8 and my task is for that same window to retain its opacity prop 0.8 when I navigate to the next window. That's what I am trying to do however instead when I navigate to the next window, the previous window opacity goes from 0.8 back to 1.0. Any potential direction on how to better have windows retain the alpha props when navigating away based on my latest script would be great.

My new script has fewer comments but with the limitation of this GitHub discussion board there is no inline syntax highlighting which makes code difficult to read. To this end I have set up a repo tracking my changes and progress. You can view my latest attempt at this location here which includes syntax highlighting for readability. For what it is worth, here it is too:

#!/usr/bin/env bash

# File: opacity-control.sh
# chmod +x and assign to Hyprland keybinds

NOTIFY_TITLE="Hyprland Opacity"
LOG_FILE="/tmp/hypr_opacity_memory.log"
MEMORY_FILE="/tmp/hypr_alpha_memory.json"

JQ=$(which jq)
HYPRCTL=$(which hyprctl)

OPACITY_STEP=0.1
MIN_OPACITY=0.1
MAX_OPACITY=1.0

mkdir -p "$(dirname "$MEMORY_FILE")"
touch "$MEMORY_FILE"
[[ ! -s $MEMORY_FILE ]] && echo "{}" > "$MEMORY_FILE"

DIRECTION="$1"

# Get the address of the active window
ADDR=$($HYPRCTL activewindow -j | $JQ -r '.address')
[[ -z "$ADDR" || "$ADDR" == "null" ]] && notify-send "$NOTIFY_TITLE" "No active window found" && exit 1

# Load the memory file
CURRENT_ALPHA=$(cat "$MEMORY_FILE" | $JQ -r --arg addr "$ADDR" '.[$addr] // 1.0')

# Adjust opacity
if [[ "$DIRECTION" == "--increase" ]]; then
    NEW_ALPHA=$(echo "$CURRENT_ALPHA + $OPACITY_STEP" | bc)
    (( $(echo "$NEW_ALPHA > $MAX_OPACITY" | bc -l) )) && NEW_ALPHA=$MAX_OPACITY
elif [[ "$DIRECTION" == "--decrease" ]]; then
    NEW_ALPHA=$(echo "$CURRENT_ALPHA - $OPACITY_STEP" | bc)
    (( $(echo "$NEW_ALPHA < $MIN_OPACITY" | bc -l) )) && NEW_ALPHA=$MIN_OPACITY
else
    notify-send "$NOTIFY_TITLE" "Usage: $0 --increase | --decrease"
    exit 1
fi

# Apply both persistent and override (for active window)
$HYPRCTL dispatch setprop "address:$ADDR" alpha "$NEW_ALPHA"
$HYPRCTL dispatch setprop "address:$ADDR" alphaoverride "$NEW_ALPHA"

# Save to memory file
TMP=$(mktemp)
cat "$MEMORY_FILE" | $JQ --arg addr "$ADDR" --argjson val "$NEW_ALPHA" '. + {($addr): $val}' > "$TMP" && mv "$TMP" "$MEMORY_FILE"

# Feedback
notify-send "$NOTIFY_TITLE" "Window $ADDR\nAlpha set to: $NEW_ALPHA"

[vaxerski]

In my new script below, I setprop the active window to, say, 0.8 and my task is for that same window to retain its opacity prop 0.8 when I navigate to the next window. That's what I am trying to do however instead when I navigate to the next window, the previous window opacity goes from 0.8 back to 1.0. Any potential direction on how to better have windows retain the alpha props when navigating away based on my latest script would be great.

Ahhh, it only sets the active alpha. Set alphainactive and alphafullscreen as well.

[enoren5]

Ahhh, it only sets the active alpha. Set alphainactive and alphafullscreen as well.

Eureka! Thank you very much @vaxerski! This works perfectly.

For what it is worth, for my future reference or for anyone else that may stumble upon this thread and may be curious to learn about my working end product, here is the final iteration of my script:

#!/usr/bin/env bash

# File: opacity-control.sh

NOTIFY_TITLE="Hyprland Opacity"
LOG_FILE="/tmp/hypr_opacity_memory.log"
MEMORY_FILE="/tmp/hypr_alpha_memory.json"

JQ=$(which jq)
HYPRCTL=$(which hyprctl)

OPACITY_STEP=0.05
MIN_OPACITY=0.1
MAX_OPACITY=1.0
DEFAULT_ALPHA=1.0

mkdir -p "$(dirname "$MEMORY_FILE")"
touch "$MEMORY_FILE"
[[ ! -s $MEMORY_FILE ]] && echo "{}" > "$MEMORY_FILE"

DIRECTION="$1"

# Get the address of the active window
ADDR=$($HYPRCTL activewindow -j | $JQ -r '.address')
[[ -z "$ADDR" || "$ADDR" == "null" ]] && notify-send "$NOTIFY_TITLE" "No active window found" && exit 1

# Load current or default alpha
CURRENT_ALPHA=$(cat "$MEMORY_FILE" | $JQ -r --arg addr "$ADDR" '.[$addr] // 1.0')

# Decide new alpha
case "$DIRECTION" in
    --increase)
        NEW_ALPHA=$(echo "$CURRENT_ALPHA + $OPACITY_STEP" | bc)
        (( $(echo "$NEW_ALPHA > $MAX_OPACITY" | bc -l) )) && NEW_ALPHA=$MAX_OPACITY
        ;;
    --decrease)
        NEW_ALPHA=$(echo "$CURRENT_ALPHA - $OPACITY_STEP" | bc)
        (( $(echo "$NEW_ALPHA < $MIN_OPACITY" | bc -l) )) && NEW_ALPHA=$MIN_OPACITY
        ;;
    --reset)
        NEW_ALPHA=$DEFAULT_ALPHA
        ;;
    *)
        notify-send "$NOTIFY_TITLE" "Usage: $0 --increase | --decrease | --reset"
        exit 1
        ;;
esac

# Apply alpha to all states
for PROP in alpha alphainactive alphafullscreen alphaoverride; do
    $HYPRCTL dispatch setprop "address:$ADDR" "$PROP" "$NEW_ALPHA"
done

# Save new alpha (even if reset) to memory file
TMP=$(mktemp)
cat "$MEMORY_FILE" | $JQ --arg addr "$ADDR" --argjson val "$NEW_ALPHA" '. + {($addr): $val}' > "$TMP" && mv "$TMP" "$MEMORY_FILE"

# Notify user
# notify-send "$NOTIFY_TITLE" "Window $ADDR\nAlpha set to: $NEW_ALPHA"