LibCore timers now have a TimerShouldFireWhenNotVisible flag which is
set to "No" by default.
If "No", the timer will not be fired by the event loop if it's within
a CObject tree whose nearest GWindow ancestor is currently not visible
for timer purposes. (Specificially, this means that the window is
either minimized or fully occluded, and so does not want to fire timers
just to update the UI.)
This is another nice step towards a calm and serene operating system.
WindowServer now tracks whether windows are occluded (meaning that
they are completely covered by one or more opaque windows sitting above
them.) This state is communicated to the windows via WindowStateChanged
messages, which then allow GWindow to mark its backing store volatile.
This reduces the effective memory impact of windows that are not at all
visible to the user. Very cool. :^)
WindowServer will now send out a WindowStateChanged message to clients
when one of their windows is minimized.
This is then forwarded to the GWindow, which will try to mark its
underlying window backing store as volatile.
This allows the kernel to steal the memory used by minimized windows
in case it starts running low. Very cool! :^)
Color themes are loaded from .ini files in /res/themes/
The theme can be switched from the "Themes" section in the system menu.
The basic mechanism is that WindowServer broadcasts a SharedBuffer with
all of the color values of the current theme. Clients receive this with
the response to their initial WindowServer::Greet handshake.
When the theme is changed, WindowServer tells everyone by sending out
an UpdateSystemTheme message with a new SharedBuffer to use.
This does feel somewhat bloated somehow, but I'm sure we can iterate on
it over time and improve things.
To get one of the theme colors, use the Color(SystemColor) constructor:
painter.fill_rect(rect, SystemColor::HoverHighlight);
Some things don't work 100% right without a reboot. Specifically, when
constructing a GWidget, it will set its own background and foreground
colors based on the current SystemColor::Window and SystemColor::Text.
The widget is then stuck with these values, and they don't update on
system theme change, only on app restart.
All in all though, this is pretty cool. Merry Christmas! :^)
Using int was a mistake. This patch changes String, StringImpl,
StringView and StringBuilder to use size_t instead of int for lengths.
Obviously a lot of code needs to change as a result of this.
Instead of only doing a relayout in the widget you're invalidating,
we now do a recursive top-down relayout so everything gets updated.
This fixes invalid results after updating a preferred size in some
situations with nested layouts.
Since we're moving to a world of ref-counting, we can't have weird
behaviors like "windows delete themselves when you close them."
The "close app when there are no more windows" mechanism is moved
to GWindow::hide(). Now, we close the app when it has no more
windows on screen.
You can now call GWindow::set_fullscreen(bool) and it will go in or out
of fullscreen mode.
WindowServer will also remember the previous window rect when switching
to fullscreen, and restore it when switching back. :^)
This was a workaround to be able to build on case-insensitive file
systems where it might get confused about <string.h> vs <String.h>.
Let's just not support building that way, so String.h can have an
objectively nicer name. :^)
Now that we can set icons directly "by bitmap", there's no need for passing
around the icon paths anymore, so get rid of all the IPC and API related
to that. :^)
Now that we support more than 2 clients per shared buffer, we can use them
for window icons. I didn't do that previously since it would have made the
Taskbar process unable to access the icons.
This opens up some nice possibilities for programmatically generated icons.
Make GWindow::close() so we can override it in GDialog and quit from the
internal event loop when the window manager tells us to close ourselves.
The dialog will return GDialog::ExecCancel in these situations.
This macro goes at the top of every CObject-derived class like so:
class SomeClass : public CObject {
C_OBJECT(SomeClass)
public:
...
At the moment, all it does is create an override for the class_name() getter
but in the future this will be used to automatically insert member functions
into these classes.
This behavior and API was extremely counter-intuitive since our default
behavior was for applications to never exit after you close all of their
windows.
Now that we exit the event loop by default when the very last GWindow is
deleted, we don't have to worry about this.
Instead of LibGUI and WindowServer building their own copies of the drawing
and graphics code, let's it in a separate LibDraw library.
This avoids building the code twice, and will encourage better separation
of concerns. :^)
