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262 lines
9.6 KiB
C++
262 lines
9.6 KiB
C++
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "my_application.h"
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#include <flutter_linux/flutter_linux.h>
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#ifdef GDK_WINDOWING_X11
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#include <gdk/gdkx.h>
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#endif
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#include "flutter/generated_plugin_registrant.h"
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struct _MyApplication {
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GtkApplication parent_instance;
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char** dart_entrypoint_arguments;
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// Channel to receive platform view requests from Flutter.
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FlMethodChannel* platform_view_channel;
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// Main window.
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GtkWindow* window;
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// Current counter.
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int64_t counter;
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// Request in progress.
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FlMethodCall* method_call;
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// Native window requested by Flutter.
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GtkWindow* native_window;
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// Label to show count.
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GtkLabel* counter_label;
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};
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G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
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static void update_counter_label(MyApplication* self) {
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g_autofree gchar* text =
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g_strdup_printf("Button tapped %" G_GINT64_FORMAT " %s.", self->counter,
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self->counter == 1 ? "time" : "times");
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gtk_label_set_text(self->counter_label, text);
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}
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static void button_clicked_cb(MyApplication* self) {
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self->counter++;
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update_counter_label(self);
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}
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static void native_window_delete_event_cb(MyApplication* self,
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gint response_id) {
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g_autoptr(FlValue) counter_value = fl_value_new_int(self->counter);
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fl_method_call_respond_success(self->method_call, counter_value, nullptr);
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g_clear_object(&self->method_call);
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}
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// Handle request to switch the view.
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static void handle_switch_view(MyApplication* self, FlMethodCall* method_call) {
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FlValue* counter_value = fl_method_call_get_args(method_call);
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if (fl_value_get_type(counter_value) != FL_VALUE_TYPE_INT) {
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fl_method_call_respond_error(self->method_call, "Invalid args",
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"Invalid switchView args", nullptr, nullptr);
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return;
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}
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self->counter = fl_value_get_int(counter_value);
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self->method_call = FL_METHOD_CALL(g_object_ref(method_call));
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// Show the same UI in a native window.
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self->native_window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
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gtk_window_set_transient_for(self->native_window, self->window);
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gtk_window_set_modal(self->native_window, TRUE);
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gtk_window_set_destroy_with_parent(self->native_window, TRUE);
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g_signal_connect_swapped(self->native_window, "delete-event",
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G_CALLBACK(native_window_delete_event_cb), self);
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GtkWidget* box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 12);
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gtk_widget_set_margin_start(box, 24);
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gtk_widget_set_margin_end(box, 24);
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gtk_widget_set_margin_top(box, 24);
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gtk_widget_set_margin_bottom(box, 24);
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gtk_widget_show(box);
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gtk_container_add(GTK_CONTAINER(self->native_window), box);
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self->counter_label = GTK_LABEL(gtk_label_new(""));
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gtk_widget_show(GTK_WIDGET(self->counter_label));
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gtk_container_add(GTK_CONTAINER(box), GTK_WIDGET(self->counter_label));
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GtkWidget* button = gtk_button_new_with_label("+");
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gtk_style_context_add_class(gtk_widget_get_style_context(GTK_WIDGET(button)),
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"circular");
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gtk_widget_set_halign(button, GTK_ALIGN_CENTER);
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gtk_widget_show(button);
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gtk_container_add(GTK_CONTAINER(box), button);
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g_signal_connect_swapped(button, "clicked", G_CALLBACK(button_clicked_cb),
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self);
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update_counter_label(self);
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gtk_window_present(self->native_window);
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}
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// Handle platform view requests from Flutter.
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static void platform_view_channel_method_cb(FlMethodChannel* channel,
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FlMethodCall* method_call,
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gpointer user_data) {
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MyApplication* self = MY_APPLICATION(user_data);
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const char* name = fl_method_call_get_name(method_call);
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if (g_str_equal(name, "switchView")) {
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handle_switch_view(self, method_call);
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} else {
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fl_method_call_respond_not_implemented(method_call, nullptr);
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}
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}
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// Called when first Flutter frame received.
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static void first_frame_cb(MyApplication* self, FlView* view) {
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gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
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}
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// Implements GApplication::activate.
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static void my_application_activate(GApplication* application) {
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MyApplication* self = MY_APPLICATION(application);
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self->window =
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GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
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// Use a header bar when running in GNOME as this is the common style used
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// by applications and is the setup most users will be using (e.g. Ubuntu
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// desktop).
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// If running on X and not using GNOME then just use a traditional title bar
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// in case the window manager does more exotic layout, e.g. tiling.
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// If running on Wayland assume the header bar will work (may need changing
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// if future cases occur).
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gboolean use_header_bar = TRUE;
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#ifdef GDK_WINDOWING_X11
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GdkScreen* screen = gtk_window_get_screen(self->window);
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if (GDK_IS_X11_SCREEN(screen)) {
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const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
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if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
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use_header_bar = FALSE;
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}
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}
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#endif
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if (use_header_bar) {
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GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
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gtk_widget_show(GTK_WIDGET(header_bar));
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gtk_header_bar_set_title(header_bar, "platform_view");
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gtk_header_bar_set_show_close_button(header_bar, TRUE);
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gtk_window_set_titlebar(self->window, GTK_WIDGET(header_bar));
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} else {
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gtk_window_set_title(self->window, "platform_view");
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}
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gtk_window_set_default_size(self->window, 1280, 720);
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g_autoptr(FlDartProject) project = fl_dart_project_new();
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fl_dart_project_set_dart_entrypoint_arguments(
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project, self->dart_entrypoint_arguments);
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FlView* view = fl_view_new(project);
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GdkRGBA background_color;
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// Background defaults to black, override it here if necessary, e.g. #00000000
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// for transparent.
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gdk_rgba_parse(&background_color, "#000000");
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fl_view_set_background_color(view, &background_color);
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gtk_widget_show(GTK_WIDGET(view));
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gtk_container_add(GTK_CONTAINER(self->window), GTK_WIDGET(view));
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// Show the window when Flutter renders.
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// Requires the view to be realized so we can start rendering.
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g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb),
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self);
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gtk_widget_realize(GTK_WIDGET(view));
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// Create channel to handle platform view requests from Flutter.
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FlEngine* engine = fl_view_get_engine(view);
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g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
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self->platform_view_channel = fl_method_channel_new(
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fl_engine_get_binary_messenger(engine),
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"samples.flutter.io/platform_view", FL_METHOD_CODEC(codec));
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fl_method_channel_set_method_call_handler(self->platform_view_channel,
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platform_view_channel_method_cb,
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self, nullptr);
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fl_register_plugins(FL_PLUGIN_REGISTRY(view));
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gtk_widget_grab_focus(GTK_WIDGET(view));
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}
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// Implements GApplication::local_command_line.
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static gboolean my_application_local_command_line(GApplication* application,
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gchar*** arguments,
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int* exit_status) {
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MyApplication* self = MY_APPLICATION(application);
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// Strip out the first argument as it is the binary name.
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self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
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g_autoptr(GError) error = nullptr;
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if (!g_application_register(application, nullptr, &error)) {
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g_warning("Failed to register: %s", error->message);
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*exit_status = 1;
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return TRUE;
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}
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g_application_activate(application);
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*exit_status = 0;
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return TRUE;
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}
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// Implements GApplication::startup.
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static void my_application_startup(GApplication* application) {
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// MyApplication* self = MY_APPLICATION(object);
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// Perform any actions required at application startup.
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G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
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}
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// Implements GApplication::shutdown.
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static void my_application_shutdown(GApplication* application) {
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// MyApplication* self = MY_APPLICATION(object);
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// Perform any actions required at application shutdown.
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G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
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}
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// Implements GObject::dispose.
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static void my_application_dispose(GObject* object) {
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MyApplication* self = MY_APPLICATION(object);
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g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
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g_clear_object(&self->platform_view_channel);
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G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
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}
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static void my_application_class_init(MyApplicationClass* klass) {
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G_APPLICATION_CLASS(klass)->activate = my_application_activate;
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G_APPLICATION_CLASS(klass)->local_command_line =
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my_application_local_command_line;
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G_APPLICATION_CLASS(klass)->startup = my_application_startup;
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G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
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G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
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}
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static void my_application_init(MyApplication* self) {}
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MyApplication* my_application_new() {
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// Set the program name to the application ID, which helps various systems
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// like GTK and desktop environments map this running application to its
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// corresponding .desktop file. This ensures better integration by allowing
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// the application to be recognized beyond its binary name.
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g_set_prgname(APPLICATION_ID);
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return MY_APPLICATION(g_object_new(my_application_get_type(),
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"application-id", APPLICATION_ID, "flags",
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G_APPLICATION_NON_UNIQUE, nullptr));
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}
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