examples/texture/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 "my_texture.h"

 #include "flutter/generated_plugin_registrant.h"

 struct _MyApplication {
   GtkApplication parent_instance;

   char** dart_entrypoint_arguments;

   // Channel to receive texture requests from Flutter.
   FlMethodChannel* texture_channel;

   // Texture we've created.
   MyTexture* texture;

   FlView* view;
 };

 G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

 // Handle request to create the texture.
 static FlMethodResponse* handle_create(MyApplication* self,
                                        FlMethodCall* method_call) {
   if (self->texture != nullptr) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Error", "texture already created", nullptr));
   }

   FlValue* args = fl_method_call_get_args(method_call);
   if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST ||
       fl_value_get_length(args) != 2) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Invalid args", "Invalid create args", nullptr));
   }
   FlValue* width_value = fl_value_get_list_value(args, 0);
   FlValue* height_value = fl_value_get_list_value(args, 1);
   if (fl_value_get_type(width_value) != FL_VALUE_TYPE_INT ||
       fl_value_get_type(height_value) != FL_VALUE_TYPE_INT) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Invalid args", "Invalid create args", nullptr));
   }

   FlEngine* engine = fl_view_get_engine(self->view);
   FlTextureRegistrar* texture_registrar =
       fl_engine_get_texture_registrar(engine);

   self->texture =
       my_texture_new(fl_value_get_int(width_value),
                      fl_value_get_int(height_value), 0x05, 0x53, 0xb1);
   if (!fl_texture_registrar_register_texture(texture_registrar,
                                              FL_TEXTURE(self->texture))) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Error", "Failed to register texture", nullptr));
   }

   // Return the texture ID to Flutter so it can use this texture.
   g_autoptr(FlValue) id =
       fl_value_new_int(fl_texture_get_id(FL_TEXTURE(self->texture)));
   return FL_METHOD_RESPONSE(fl_method_success_response_new(id));
 }

 // Handle request to set the texture color.
 static FlMethodResponse* handle_set_color(MyApplication* self,
                                           FlMethodCall* method_call) {
   FlValue* args = fl_method_call_get_args(method_call);
   if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST ||
       fl_value_get_length(args) != 3) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Invalid args", "Invalid setColor args", nullptr));
   }
   FlValue* r_value = fl_value_get_list_value(args, 0);
   FlValue* g_value = fl_value_get_list_value(args, 1);
   FlValue* b_value = fl_value_get_list_value(args, 2);
   if (fl_value_get_type(r_value) != FL_VALUE_TYPE_INT ||
       fl_value_get_type(g_value) != FL_VALUE_TYPE_INT ||
       fl_value_get_type(b_value) != FL_VALUE_TYPE_INT) {
     return FL_METHOD_RESPONSE(fl_method_error_response_new(
         "Invalid args", "Invalid setColor args", nullptr));
   }

   FlEngine* engine = fl_view_get_engine(self->view);
   FlTextureRegistrar* texture_registrar =
       fl_engine_get_texture_registrar(engine);

   // Redraw in requested color.
   my_texture_set_color(self->texture, fl_value_get_int(r_value),
                        fl_value_get_int(g_value), fl_value_get_int(b_value));

   // Notify Flutter the texture has changed.
   fl_texture_registrar_mark_texture_frame_available(texture_registrar,
                                                     FL_TEXTURE(self->texture));

   return FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
 }

 // Handle texture requests from Flutter.
 static void texture_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, "create")) {
     g_autoptr(FlMethodResponse) response = handle_create(self, method_call);
     fl_method_call_respond(method_call, response, NULL);
   } else if (g_str_equal(name, "setColor")) {
     g_autoptr(FlMethodResponse) response = handle_set_color(self, method_call);
     fl_method_call_respond(method_call, response, NULL);
   } else {
     fl_method_call_respond_not_implemented(method_call, NULL);
   }
 }

 // 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);
   GtkWindow* 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(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, "texture");
     gtk_header_bar_set_show_close_button(header_bar, TRUE);
     gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
   } else {
     gtk_window_set_title(window, "texture");
   }

   gtk_window_set_default_size(window, 1280, 720);

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

   self->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(self->view, &background_color);
   gtk_widget_show(GTK_WIDGET(self->view));
   gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(self->view));

   // Show the window when Flutter renders.
   // Requires the view to be realized so we can start rendering.
   g_signal_connect_swapped(self->view, "first-frame", G_CALLBACK(first_frame_cb),
                            self);
   gtk_widget_realize(GTK_WIDGET(self->view));

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

   fl_register_plugins(FL_PLUGIN_REGISTRY(self->view));

   gtk_widget_grab_focus(GTK_WIDGET(self->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->texture_channel);
   g_clear_object(&self->texture);

   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 "my_texture.h"

	#include "flutter/generated_plugin_registrant.h"

	struct _MyApplication {
	GtkApplication parent_instance;

	char** dart_entrypoint_arguments;

	// Channel to receive texture requests from Flutter.
	FlMethodChannel* texture_channel;

	// Texture we've created.
	MyTexture* texture;

	FlView* view;
	};

	G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)

	// Handle request to create the texture.
	static FlMethodResponse* handle_create(MyApplication* self,
	FlMethodCall* method_call) {
	if (self->texture != nullptr) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Error", "texture already created", nullptr));
	}

	FlValue* args = fl_method_call_get_args(method_call);
	if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST \|\|
	fl_value_get_length(args) != 2) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Invalid args", "Invalid create args", nullptr));
	}
	FlValue* width_value = fl_value_get_list_value(args, 0);
	FlValue* height_value = fl_value_get_list_value(args, 1);
	if (fl_value_get_type(width_value) != FL_VALUE_TYPE_INT \|\|
	fl_value_get_type(height_value) != FL_VALUE_TYPE_INT) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Invalid args", "Invalid create args", nullptr));
	}

	FlEngine* engine = fl_view_get_engine(self->view);
	FlTextureRegistrar* texture_registrar =
	fl_engine_get_texture_registrar(engine);

	self->texture =
	my_texture_new(fl_value_get_int(width_value),
	fl_value_get_int(height_value), 0x05, 0x53, 0xb1);
	if (!fl_texture_registrar_register_texture(texture_registrar,
	FL_TEXTURE(self->texture))) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Error", "Failed to register texture", nullptr));
	}

	// Return the texture ID to Flutter so it can use this texture.
	g_autoptr(FlValue) id =
	fl_value_new_int(fl_texture_get_id(FL_TEXTURE(self->texture)));
	return FL_METHOD_RESPONSE(fl_method_success_response_new(id));
	}

	// Handle request to set the texture color.
	static FlMethodResponse* handle_set_color(MyApplication* self,
	FlMethodCall* method_call) {
	FlValue* args = fl_method_call_get_args(method_call);
	if (fl_value_get_type(args) != FL_VALUE_TYPE_LIST \|\|
	fl_value_get_length(args) != 3) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Invalid args", "Invalid setColor args", nullptr));
	}
	FlValue* r_value = fl_value_get_list_value(args, 0);
	FlValue* g_value = fl_value_get_list_value(args, 1);
	FlValue* b_value = fl_value_get_list_value(args, 2);
	if (fl_value_get_type(r_value) != FL_VALUE_TYPE_INT \|\|
	fl_value_get_type(g_value) != FL_VALUE_TYPE_INT \|\|
	fl_value_get_type(b_value) != FL_VALUE_TYPE_INT) {
	return FL_METHOD_RESPONSE(fl_method_error_response_new(
	"Invalid args", "Invalid setColor args", nullptr));
	}

	FlEngine* engine = fl_view_get_engine(self->view);
	FlTextureRegistrar* texture_registrar =
	fl_engine_get_texture_registrar(engine);

	// Redraw in requested color.
	my_texture_set_color(self->texture, fl_value_get_int(r_value),
	fl_value_get_int(g_value), fl_value_get_int(b_value));

	// Notify Flutter the texture has changed.
	fl_texture_registrar_mark_texture_frame_available(texture_registrar,
	FL_TEXTURE(self->texture));

	return FL_METHOD_RESPONSE(fl_method_success_response_new(nullptr));
	}

	// Handle texture requests from Flutter.
	static void texture_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, "create")) {
	g_autoptr(FlMethodResponse) response = handle_create(self, method_call);
	fl_method_call_respond(method_call, response, NULL);
	} else if (g_str_equal(name, "setColor")) {
	g_autoptr(FlMethodResponse) response = handle_set_color(self, method_call);
	fl_method_call_respond(method_call, response, NULL);
	} else {
	fl_method_call_respond_not_implemented(method_call, NULL);
	}
	}

	// 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);
	GtkWindow* 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(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, "texture");
	gtk_header_bar_set_show_close_button(header_bar, TRUE);
	gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
	} else {
	gtk_window_set_title(window, "texture");
	}

	gtk_window_set_default_size(window, 1280, 720);

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

	self->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(self->view, &background_color);
	gtk_widget_show(GTK_WIDGET(self->view));
	gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(self->view));

	// Show the window when Flutter renders.
	// Requires the view to be realized so we can start rendering.
	g_signal_connect_swapped(self->view, "first-frame", G_CALLBACK(first_frame_cb),
	self);
	gtk_widget_realize(GTK_WIDGET(self->view));

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

	fl_register_plugins(FL_PLUGIN_REGISTRY(self->view));

	gtk_widget_grab_focus(GTK_WIDGET(self->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->texture_channel);
	g_clear_object(&self->texture);

	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));
	}