This fixes a crash where if you switched to a theme that has hover
icons for title buttons, then back to a theme that does not. Then
when you next hover over the title buttons the window server would
crash.
This was due to the hover_bitmap multi-scale bitmap pointer being
non-null, but not containing any bitmaps, so hitting an assertion
when painting.
This allows adding "-hover.png" variants of the title button icons.
This can be useful for themes which use the TitleButtonsIconOnly
flag, which otherwise don't have a way of showing the hover state.
With this flag set to true only the icon of the title button is painted.
This is useful for themes with a more non-serenity look such as
Coffee and Cupertino (that currently try to hide the button).
This enables rendering of mixed-scale screen layouts with e.g. high
resolution cursors and window button icons on high-dpi screens while
using lower resolution bitmaps on regular screens.
Without this change, window buttons would get stuck in the "pressed"
state as long as the left mouse button was pressed, even if you moved
the mouse cursor out of the button rect.
This ignores unhandled mouse clicks for the window buttons. Right now
right-clicking on the window buttons animates them as if some action
were to occur when the mouse button is released.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
Button now can handle middle and right clicks.
Added 2 new handlers in button class: on_right_click for Right mouse
button and on_middle_click for middle mouse button.
Added functionality to vertically maximize window with middle mouse
click on the maximize window button.
Also added a way to vertically maximize window by resizing window
height-wise lower than the maximum window height.
