examples/platform_view/linux/runner/my_application.cc - mirrors/flutter - Git at Google

 // Copyright 2014 The Flutter Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "my_application.h"

 #include <flutter_linux/flutter_linux.h>
 #ifdef GDK_WINDOWING_X11
 #include <gdk/gdkx.h>
 #endif

 #include "flutter/generated_plugin_registrant.h"

 struct _MyApplication {
   GtkApplication parent_instance;

   char** dart_entrypoint_arguments;

   // Channel to receive platform view requests from Flutter.
   FlMethodChannel* platform_view_channel;

   // Main window.
   GtkWindow* window;

   // Current counter.
   int64_t counter;

   // Request in progress.
   FlMethodCall* method_call;

   // Native window requested by Flutter.
   GtkWindow* native_window;

   // Label to show count.
   GtkLabel* counter_label;
 };

 G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

 static void update_counter_label(MyApplication* self) {
   g_autofree gchar* text =
       g_strdup_printf("Button tapped %" G_GINT64_FORMAT " %s.", self->counter,
                       self->counter == 1 ? "time" : "times");
   gtk_label_set_text(self->counter_label, text);
 }

 static void button_clicked_cb(MyApplication* self) {
   self->counter++;
   update_counter_label(self);
 }

 static void native_window_delete_event_cb(MyApplication* self,
                                           gint response_id) {
   g_autoptr(FlValue) counter_value = fl_value_new_int(self->counter);
   fl_method_call_respond_success(self->method_call, counter_value, nullptr);
   g_clear_object(&self->method_call);
 }

 // Handle request to switch the view.
 static void handle_switch_view(MyApplication* self, FlMethodCall* method_call) {
   FlValue* counter_value = fl_method_call_get_args(method_call);
   if (fl_value_get_type(counter_value) != FL_VALUE_TYPE_INT) {
     fl_method_call_respond_error(self->method_call, "Invalid args",
                                  "Invalid switchView args", nullptr, nullptr);
     return;
   }

   self->counter = fl_value_get_int(counter_value);
   self->method_call = FL_METHOD_CALL(g_object_ref(method_call));

   // Show the same UI in a native window.
   self->native_window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
   gtk_window_set_transient_for(self->native_window, self->window);
   gtk_window_set_modal(self->native_window, TRUE);
   gtk_window_set_destroy_with_parent(self->native_window, TRUE);
   g_signal_connect_swapped(self->native_window, "delete-event",
                            G_CALLBACK(native_window_delete_event_cb), self);

   GtkWidget* box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 12);
   gtk_widget_set_margin_start(box, 24);
   gtk_widget_set_margin_end(box, 24);
   gtk_widget_set_margin_top(box, 24);
   gtk_widget_set_margin_bottom(box, 24);
   gtk_widget_show(box);
   gtk_container_add(GTK_CONTAINER(self->native_window), box);

   self->counter_label = GTK_LABEL(gtk_label_new(""));
   gtk_widget_show(GTK_WIDGET(self->counter_label));
   gtk_container_add(GTK_CONTAINER(box), GTK_WIDGET(self->counter_label));

   GtkWidget* button = gtk_button_new_with_label("+");
   gtk_style_context_add_class(gtk_widget_get_style_context(GTK_WIDGET(button)),
                               "circular");
   gtk_widget_set_halign(button, GTK_ALIGN_CENTER);
   gtk_widget_show(button);
   gtk_container_add(GTK_CONTAINER(box), button);
   g_signal_connect_swapped(button, "clicked", G_CALLBACK(button_clicked_cb),
                            self);

   update_counter_label(self);

   gtk_window_present(self->native_window);
 }

 // Handle platform view requests from Flutter.
 static void platform_view_channel_method_cb(FlMethodChannel* channel,
                                             FlMethodCall* method_call,
                                             gpointer user_data) {
   MyApplication* self = MY_APPLICATION(user_data);

   const char* name = fl_method_call_get_name(method_call);
   if (g_str_equal(name, "switchView")) {
     handle_switch_view(self, method_call);
   } else {
     fl_method_call_respond_not_implemented(method_call, nullptr);
   }
 }

 // 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);
   self->window =
       GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));

   // Use a header bar when running in GNOME as this is the common style used
   // by applications and is the setup most users will be using (e.g. Ubuntu
   // desktop).
   // If running on X and not using GNOME then just use a traditional title bar
   // in case the window manager does more exotic layout, e.g. tiling.
   // If running on Wayland assume the header bar will work (may need changing
   // if future cases occur).
   gboolean use_header_bar = TRUE;
 #ifdef GDK_WINDOWING_X11
   GdkScreen* screen = gtk_window_get_screen(self->window);
   if (GDK_IS_X11_SCREEN(screen)) {
     const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
     if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
       use_header_bar = FALSE;
     }
   }
 #endif
   if (use_header_bar) {
     GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
     gtk_widget_show(GTK_WIDGET(header_bar));
     gtk_header_bar_set_title(header_bar, "platform_view");
     gtk_header_bar_set_show_close_button(header_bar, TRUE);
     gtk_window_set_titlebar(self->window, GTK_WIDGET(header_bar));
   } else {
     gtk_window_set_title(self->window, "platform_view");
   }

   gtk_window_set_default_size(self->window, 1280, 720);

   g_autoptr(FlDartProject) project = fl_dart_project_new();
   fl_dart_project_set_dart_entrypoint_arguments(
       project, self->dart_entrypoint_arguments);

   FlView* view = fl_view_new(project);
   GdkRGBA background_color;
   // Background defaults to black, override it here if necessary, e.g. #00000000
   // for transparent.
   gdk_rgba_parse(&background_color, "#000000");
   fl_view_set_background_color(view, &background_color);
   gtk_widget_show(GTK_WIDGET(view));
   gtk_container_add(GTK_CONTAINER(self->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));

   // Create channel to handle platform view requests from Flutter.
   FlEngine* engine = fl_view_get_engine(view);
   g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
   self->platform_view_channel = fl_method_channel_new(
       fl_engine_get_binary_messenger(engine),
       "samples.flutter.io/platform_view", FL_METHOD_CODEC(codec));
   fl_method_channel_set_method_call_handler(self->platform_view_channel,
                                             platform_view_channel_method_cb,
                                             self, nullptr);

   fl_register_plugins(FL_PLUGIN_REGISTRY(view));

   gtk_widget_grab_focus(GTK_WIDGET(view));
 }

 // Implements GApplication::local_command_line.
 static gboolean my_application_local_command_line(GApplication* application,
                                                   gchar*** arguments,
                                                   int* exit_status) {
   MyApplication* self = MY_APPLICATION(application);
   // Strip out the first argument as it is the binary name.
   self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);

   g_autoptr(GError) error = nullptr;
   if (!g_application_register(application, nullptr, &error)) {
     g_warning("Failed to register: %s", error->message);
     *exit_status = 1;
     return TRUE;
   }

   g_application_activate(application);
   *exit_status = 0;

   return TRUE;
 }

 // Implements GApplication::startup.
 static void my_application_startup(GApplication* application) {
   // MyApplication* self = MY_APPLICATION(object);

   // Perform any actions required at application startup.

   G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
 }

 // Implements GApplication::shutdown.
 static void my_application_shutdown(GApplication* application) {
   // MyApplication* self = MY_APPLICATION(object);

   // Perform any actions required at application shutdown.

   G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
 }

 // Implements GObject::dispose.
 static void my_application_dispose(GObject* object) {
   MyApplication* self = MY_APPLICATION(object);
   g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
   g_clear_object(&self->platform_view_channel);
   G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
 }

 static void my_application_class_init(MyApplicationClass* klass) {
   G_APPLICATION_CLASS(klass)->activate = my_application_activate;
   G_APPLICATION_CLASS(klass)->local_command_line =
       my_application_local_command_line;
   G_APPLICATION_CLASS(klass)->startup = my_application_startup;
   G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
   G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
 }

 static void my_application_init(MyApplication* self) {}

 MyApplication* my_application_new() {
   // Set the program name to the application ID, which helps various systems
   // like GTK and desktop environments map this running application to its
   // corresponding .desktop file. This ensures better integration by allowing
   // the application to be recognized beyond its binary name.
   g_set_prgname(APPLICATION_ID);

   return MY_APPLICATION(g_object_new(my_application_get_type(),
                                      "application-id", APPLICATION_ID, "flags",
                                      G_APPLICATION_NON_UNIQUE, nullptr));
 }
	// Copyright 2014 The Flutter Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "my_application.h"

	#include <flutter_linux/flutter_linux.h>
	#ifdef GDK_WINDOWING_X11
	#include <gdk/gdkx.h>
	#endif

	#include "flutter/generated_plugin_registrant.h"

	struct _MyApplication {
	GtkApplication parent_instance;

	char** dart_entrypoint_arguments;

	// Channel to receive platform view requests from Flutter.
	FlMethodChannel* platform_view_channel;

	// Main window.
	GtkWindow* window;

	// Current counter.
	int64_t counter;

	// Request in progress.
	FlMethodCall* method_call;

	// Native window requested by Flutter.
	GtkWindow* native_window;

	// Label to show count.
	GtkLabel* counter_label;
	};

	G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

	static void update_counter_label(MyApplication* self) {
	g_autofree gchar* text =
	g_strdup_printf("Button tapped %" G_GINT64_FORMAT " %s.", self->counter,
	self->counter == 1 ? "time" : "times");
	gtk_label_set_text(self->counter_label, text);
	}

	static void button_clicked_cb(MyApplication* self) {
	self->counter++;
	update_counter_label(self);
	}

	static void native_window_delete_event_cb(MyApplication* self,
	gint response_id) {
	g_autoptr(FlValue) counter_value = fl_value_new_int(self->counter);
	fl_method_call_respond_success(self->method_call, counter_value, nullptr);
	g_clear_object(&self->method_call);
	}

	// Handle request to switch the view.
	static void handle_switch_view(MyApplication* self, FlMethodCall* method_call) {
	FlValue* counter_value = fl_method_call_get_args(method_call);
	if (fl_value_get_type(counter_value) != FL_VALUE_TYPE_INT) {
	fl_method_call_respond_error(self->method_call, "Invalid args",
	"Invalid switchView args", nullptr, nullptr);
	return;
	}

	self->counter = fl_value_get_int(counter_value);
	self->method_call = FL_METHOD_CALL(g_object_ref(method_call));

	// Show the same UI in a native window.
	self->native_window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
	gtk_window_set_transient_for(self->native_window, self->window);
	gtk_window_set_modal(self->native_window, TRUE);
	gtk_window_set_destroy_with_parent(self->native_window, TRUE);
	g_signal_connect_swapped(self->native_window, "delete-event",
	G_CALLBACK(native_window_delete_event_cb), self);

	GtkWidget* box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 12);
	gtk_widget_set_margin_start(box, 24);
	gtk_widget_set_margin_end(box, 24);
	gtk_widget_set_margin_top(box, 24);
	gtk_widget_set_margin_bottom(box, 24);
	gtk_widget_show(box);
	gtk_container_add(GTK_CONTAINER(self->native_window), box);

	self->counter_label = GTK_LABEL(gtk_label_new(""));
	gtk_widget_show(GTK_WIDGET(self->counter_label));
	gtk_container_add(GTK_CONTAINER(box), GTK_WIDGET(self->counter_label));

	GtkWidget* button = gtk_button_new_with_label("+");
	gtk_style_context_add_class(gtk_widget_get_style_context(GTK_WIDGET(button)),
	"circular");
	gtk_widget_set_halign(button, GTK_ALIGN_CENTER);
	gtk_widget_show(button);
	gtk_container_add(GTK_CONTAINER(box), button);
	g_signal_connect_swapped(button, "clicked", G_CALLBACK(button_clicked_cb),
	self);

	update_counter_label(self);

	gtk_window_present(self->native_window);
	}

	// Handle platform view requests from Flutter.
	static void platform_view_channel_method_cb(FlMethodChannel* channel,
	FlMethodCall* method_call,
	gpointer user_data) {
	MyApplication* self = MY_APPLICATION(user_data);

	const char* name = fl_method_call_get_name(method_call);
	if (g_str_equal(name, "switchView")) {
	handle_switch_view(self, method_call);
	} else {
	fl_method_call_respond_not_implemented(method_call, nullptr);
	}
	}

	// 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);
	self->window =
	GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));

	// Use a header bar when running in GNOME as this is the common style used
	// by applications and is the setup most users will be using (e.g. Ubuntu
	// desktop).
	// If running on X and not using GNOME then just use a traditional title bar
	// in case the window manager does more exotic layout, e.g. tiling.
	// If running on Wayland assume the header bar will work (may need changing
	// if future cases occur).
	gboolean use_header_bar = TRUE;
	#ifdef GDK_WINDOWING_X11
	GdkScreen* screen = gtk_window_get_screen(self->window);
	if (GDK_IS_X11_SCREEN(screen)) {
	const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
	if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
	use_header_bar = FALSE;
	}
	}
	#endif
	if (use_header_bar) {
	GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
	gtk_widget_show(GTK_WIDGET(header_bar));
	gtk_header_bar_set_title(header_bar, "platform_view");
	gtk_header_bar_set_show_close_button(header_bar, TRUE);
	gtk_window_set_titlebar(self->window, GTK_WIDGET(header_bar));
	} else {
	gtk_window_set_title(self->window, "platform_view");
	}

	gtk_window_set_default_size(self->window, 1280, 720);

	g_autoptr(FlDartProject) project = fl_dart_project_new();
	fl_dart_project_set_dart_entrypoint_arguments(
	project, self->dart_entrypoint_arguments);

	FlView* view = fl_view_new(project);
	GdkRGBA background_color;
	// Background defaults to black, override it here if necessary, e.g. #00000000
	// for transparent.
	gdk_rgba_parse(&background_color, "#000000");
	fl_view_set_background_color(view, &background_color);
	gtk_widget_show(GTK_WIDGET(view));
	gtk_container_add(GTK_CONTAINER(self->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));

	// Create channel to handle platform view requests from Flutter.
	FlEngine* engine = fl_view_get_engine(view);
	g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
	self->platform_view_channel = fl_method_channel_new(
	fl_engine_get_binary_messenger(engine),
	"samples.flutter.io/platform_view", FL_METHOD_CODEC(codec));
	fl_method_channel_set_method_call_handler(self->platform_view_channel,
	platform_view_channel_method_cb,
	self, nullptr);

	fl_register_plugins(FL_PLUGIN_REGISTRY(view));

	gtk_widget_grab_focus(GTK_WIDGET(view));
	}

	// Implements GApplication::local_command_line.
	static gboolean my_application_local_command_line(GApplication* application,
	gchar*** arguments,
	int* exit_status) {
	MyApplication* self = MY_APPLICATION(application);
	// Strip out the first argument as it is the binary name.
	self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);

	g_autoptr(GError) error = nullptr;
	if (!g_application_register(application, nullptr, &error)) {
	g_warning("Failed to register: %s", error->message);
	*exit_status = 1;
	return TRUE;
	}

	g_application_activate(application);
	*exit_status = 0;

	return TRUE;
	}

	// Implements GApplication::startup.
	static void my_application_startup(GApplication* application) {
	// MyApplication* self = MY_APPLICATION(object);

	// Perform any actions required at application startup.

	G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
	}

	// Implements GApplication::shutdown.
	static void my_application_shutdown(GApplication* application) {
	// MyApplication* self = MY_APPLICATION(object);

	// Perform any actions required at application shutdown.

	G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
	}

	// Implements GObject::dispose.
	static void my_application_dispose(GObject* object) {
	MyApplication* self = MY_APPLICATION(object);
	g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
	g_clear_object(&self->platform_view_channel);
	G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
	}

	static void my_application_class_init(MyApplicationClass* klass) {
	G_APPLICATION_CLASS(klass)->activate = my_application_activate;
	G_APPLICATION_CLASS(klass)->local_command_line =
	my_application_local_command_line;
	G_APPLICATION_CLASS(klass)->startup = my_application_startup;
	G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
	G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
	}

	static void my_application_init(MyApplication* self) {}

	MyApplication* my_application_new() {
	// Set the program name to the application ID, which helps various systems
	// like GTK and desktop environments map this running application to its
	// corresponding .desktop file. This ensures better integration by allowing
	// the application to be recognized beyond its binary name.
	g_set_prgname(APPLICATION_ID);

	return MY_APPLICATION(g_object_new(my_application_get_type(),
	"application-id", APPLICATION_ID, "flags",
	G_APPLICATION_NON_UNIQUE, nullptr));
	}