Summary:
This adds support for the new on-screen-message support to the
kwineffects API and makes use of it in the colorpicker effect.
Not yet added to screenshot effect as for that we need support for
skip close animation on the on-screen-message window.
Reviewers: #plasma, #kwin
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3803
Summary:
The effect exports itself to DBus as object "/ColorPicker" and provides
an own interface "org.kde.kwin.ColorPicker".
It has one exported method to DBus "pick" which returns a QColor. When
invoked an interactive position picking selection is started. If it ends
the effect reads the color value at the picked position from the OpenGL
color buffer.
This implements T4568.
Reviewers: #kwin, #plasma_on_wayland, broulik
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3480
