Since initialization on first startup or during a database schema update
can take several seconds, show a splash screen. In the initial
implementation, this is just a small Clementine logo.
The benefit of instantiating the splash in the Application class rather
than in main is that it could eventually show status messages during
startup. However, this implementation does not use the
QSplashScreen::finish mechanism that would synchronize the hiding of the
splash screen with the showing of the main window.
Add a slot that is invoked when the main application loop starts. This
can be used to perform setup tasks after the initialization has
occurred. Initial use is to hide a splash.
Move the debug console variable check to a static method in the
Application class and use environment variable CLEMENTINE_DEBUG instead
of CLEMENTINE_DEBUG_CONSOLE. This will allow debug features to be
enabled elsewhere in the code.
Example:
CLEMENTINE_DEBUG=1 clementine
Add a MainWindow signal that is emitted when a debug console is created. Relay
that signal to the Application. Add an AddPage method to the Console class that
allows components to populate pages when they receive the signal.
Clementine detects a data directory in the same directory as the executable to
determine portable configuration. But there are some packages that create
/usr/bin/data, causing Clementine to run in portable mode.
Use a more unique data directory name, clementine-data, as the portable data
directory. For backwards compatibility, use the legacy data directory if the
already exists there.
Instead of immediately saving, which leads to poor performance,
and possible hardware damage (see #6057), limit saves to once
per second (similar to how KDE does it). It also guarantees
that only one save is required per second, by sharing a QSettings
object, and establishes a signaling framework to put other
setting save events into (but only uses this for the two major
offenders: playlist tab switching and window resizing).
This is in contrast to 6a312e7, which simply deferred the save
until program exit, and caused problems for some people (see #6217
and #6209).
Signed-off-by: Antonio Russo <antonio.e.russo@gmail.com>