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Show window on first frame on Linux (#170844)

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Wait for the first Flutter frame before showing the window. This avoids
showing a window with empty Flutter content, which defaults to a black
background.

Part of https://github.com/flutter/flutter/issues/55427
Fixes https://github.com/flutter/flutter/issues/118269
This commit is contained in:
Robert Ancell 2025-06-23 10:46:36 +12:00 committed by GitHub
parent dd40c13375
commit 5d5355f48d
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1 changed files with 11 additions and 1 deletions
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12
packages/flutter_tools/templates/app/linux.tmpl/runner/my_application.cc.tmpl
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@ -14,6 +14,12 @@ struct _MyApplication {
G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
// Called when first Flutter frame received.
static void first_frame_cb(MyApplication* self, FlView *view)
{
gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
}
// Implements GApplication::activate.
static void my_application_activate(GApplication* application) {
MyApplication* self = MY_APPLICATION(application);
@ -48,7 +54,6 @@ static void my_application_activate(GApplication* application) {
}
gtk_window_set_default_size(window, 1280, 720);
gtk_widget_show(GTK_WIDGET(window));
g_autoptr(FlDartProject) project = fl_dart_project_new();
fl_dart_project_set_dart_entrypoint_arguments(project, self->dart_entrypoint_arguments);
@ -61,6 +66,11 @@ static void my_application_activate(GApplication* application) {
gtk_widget_show(GTK_WIDGET(view));
gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
// Show the window when Flutter renders.
// Requires the view to be realized so we can start rendering.
g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb), self);
gtk_widget_realize(GTK_WIDGET(view));
fl_register_plugins(FL_PLUGIN_REGISTRY(view));
gtk_widget_grab_focus(GTK_WIDGET(view));