msg_control.cpp

/*
注：目前仅适配了1920*1080的分辨率
*/
#include <gtk/gtk.h>
#include <locale.h>

gboolean move_window(gpointer data)
{
  GtkWidget *window = GTK_WIDGET(data);

  static gint x = 1920;
  static gint y = 0;

  gtk_window_move(GTK_WINDOW(window), x, y);

  x -= 2;

  if (x <= -900 && y == 0) {
    gtk_main_quit();
    return G_SOURCE_REMOVE;
  }

  return G_SOURCE_CONTINUE;
}

int main(int argc, char *argv[])
{
  setlocale(LC_ALL, "en_US.UTF-8");
  gtk_init(&argc, &argv);

  GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  GtkWidget *label = gtk_label_new(g_locale_to_utf8(argv[1], -1, NULL, NULL, NULL));
  GtkWidget *table = gtk_table_new(1, 1, TRUE);
  gtk_container_add(GTK_CONTAINER(window), table);
  gtk_table_attach_defaults(GTK_TABLE(table), label, 0, 1, 0, 1);
  g_signal_connect_swapped(label, "pressed", G_CALLBACK(gtk_main_quit), window);

  // 设置文本的样式
  GdkRGBA color;
  gdk_rgba_parse(&color, "rgba(255, 255, 255, 0.5)");
  gtk_widget_override_background_color(label, GTK_STATE_FLAG_NORMAL, &color);
  PangoFontDescription *font_desc = pango_font_description_from_string("Sans 32");
  gtk_widget_override_font(label, font_desc);

  g_timeout_add(8, move_window, window);

  // 设置窗口起始位置为右上角
  gint screen_width = gdk_screen_get_width(gtk_widget_get_screen(window));
  gtk_window_move(GTK_WINDOW(window), screen_width, 0);

  // 隐藏标题栏
  gtk_window_set_decorated(GTK_WINDOW(window), FALSE);

  // 设置窗口置顶
  gtk_window_set_keep_above(GTK_WINDOW(window), TRUE);

  gtk_widget_show_all(window);
  gtk_main();

  return 0;
}