hluk/CopyQ

Setting alternate row's alpha doesn't make it transparent

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#3,109 opened on Jul 23, 2025

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bughelp wanted

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Description

Describe the bug In the Preferences -> Appearance tab, the alpha channel (transparency) for the "Alternate" row background color is ignored. When a user sets the alternate background color to be transparent, the application disregards the alpha setting and renders the row with an opaque color instead.

To Reproduce

  • Open CopyQ and go to Preferences
  • Navigate to the Appearance tab.
  • In the color table, change the "Alternate" color.
  • In the color picker dialog, set the alpha to < 255.

Expected behavior Setting the alpha channel of the "Alternate" background color to < 255 should make the row's background transparent.

Screenshots With both normal and alternate set to rgba(0,0,0,70):

Version, OS and Environment

  • CopyQ Clipboard Manager 10.0.0
  • Qt: 5.15.16
  • KNotifications: 5.116.0
  • Compiler: GCC
  • Arch: x86_64-little_endian-lp64
  • OS: Arch Linux
  • WM: Hyprland

Contributor guide

Research direction
Investigate how the alternate row background color is applied in the Preferences Appearance tab. The issue likely lies in the code that sets the alternate color to the table widget. Look for where QPalette or QBrush is used for alternateBase and ensure the alpha channel is not being stripped. Check if the color is passed through a function that ignores alpha, or if the table's style is overriding transparency.
Tech stack
cpp
Domain
desktop
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++ basicsQt painting
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70