[Webkit-unassigned] [Bug 211178] New: [GTK4] Make popup menus work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211178

            Bug ID: 211178
           Summary: [GTK4] Make popup menus work
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aperez at igalia.com
                CC: bugs-noreply at webkitgtk.org

Currently for popups menus windows of type GTK_WINDOW_POPUP are used,
but this is not possible with GTK4 anymore. The way to create a popup
window is using GtkPopover.

If we want to mimic GTK combo boxes, we likely would need to reimplement
parts of GtkTreePopover, which is the internal widget used as the popup
part of combo boxes. On the other hand, we may be able to put the widget
currently used inside a GtkPopover instead of inside the popup GtkWindow,
apply the same CSS classes that GtkComboBox uses, and maybe that would be
already good.

Note that ideally we want to use the same code for both GTK3 and GTK4,
as it was done recently for context menus in bug #170553 :)

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