如何创建Unity指标？
我对Unity指标感兴趣，并想知道是否有任何关于如何编程它们的教程。 我可以使用现有的来源作为最后的手段，但我更喜欢更友好的方法，因为我的编程技巧非常有限。
此处提供了包含示例和API文档的应用程序指标文档：
- https://wiki.ubuntu.com/DesktopExperienceTeam/ApplicationIndicators ，它的API参考是
libappindicator-doc包中的HTML。 （谢谢@Sneetsher） -
http://developer.ubuntu.com/apps（破）
目前还没有关于应用指标的教程，但请继续关注App Developer网站教程部分的更多内容：
这是C中的应用程序指示器示例。这是Ubuntu Wiki提供的示例的“仅指示器”版本（无窗口）：
#include static void activate_action (GtkAction *action); static GtkActionEntry entries[] = { {"New", "document-new", "_New", "N", "Create a new file", G_CALLBACK(activate_action)}, {"Open", "document-open", "_Open", " O", "Open a file", G_CALLBACK(activate_action)}, {"Save", "document-save", "_Save", " S", "Save file", G_CALLBACK(activate_action)}, {"Quit", "application-exit", "_Quit", " Q", "Exit the application", G_CALLBACK(gtk_main_quit)}, }; static guint n_entries = G_N_ELEMENTS(entries); static const gchar *ui_info = "" " " " " " " " " " " " " " "; static void activate_action(GtkAction *action) { const gchar *name = gtk_action_get_name (action); GtkWidget *dialog; dialog = gtk_message_dialog_new(NULL, GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_INFO, GTK_BUTTONS_CLOSE, "You activated action: \"%s\"", name); g_signal_connect(dialog, "response", G_CALLBACK(gtk_widget_destroy), NULL); gtk_widget_show(dialog); } int main(int argc, char **argv) { GtkWidget* indicator_menu; GtkActionGroup* action_group; GtkUIManager* uim; AppIndicator* indicator; GError* error = NULL; gtk_init(&argc, &argv); /* Menus */ action_group = gtk_action_group_new("AppActions"); gtk_action_group_add_actions(action_group, entries, n_entries, NULL); uim = gtk_ui_manager_new(); gtk_ui_manager_insert_action_group(uim, action_group, 0); if (!gtk_ui_manager_add_ui_from_string(uim, ui_info, -1, &error)) { g_message("Failed to build menus: %s\n", error->message); g_error_free(error); error = NULL; } /* Indicator */ indicator = app_indicator_new("example-simple-client", "go-jump", APP_INDICATOR_CATEGORY_APPLICATION_STATUS); indicator_menu = gtk_ui_manager_get_widget(uim, "/ui/IndicatorPopup"); app_indicator_set_status(indicator, APP_INDICATOR_STATUS_ACTIVE); app_indicator_set_attention_icon(indicator, "indicator-messages-new"); app_indicator_set_menu(indicator, GTK_MENU(indicator_menu)); gtk_main(); return 0; }
我在这里做了一个简短的教程，用于在python中创建一个秒表应用程序指示器： http ： //www.steshadoku.com/blog/2017/elapses-creating-a-unity-stopwatch-indicator-w-python/
import gobject import gtk import appindicator import os, sys import time from datetime import timedelta if __name__ == "__main__": saveseconds = 0 #global variable to save how many seconds the clock has run dir_path = os.path.dirname(os.path.realpath(__file__)) source_id = "" def on_timer(args=None): savetime = int(time.time() - timestart) + saveseconds ind.set_label(str(timedelta(seconds=savetime))) return True def finish(args=None): sys.exit() return True def stoptime(args=None): #print(source_id) global saveseconds saveseconds += int(time.time() - timestart) gtk.timeout_remove(source_id) return True def starttime(args=None): global timestart timestart = time.time() global source_id source_id = gtk.timeout_add(1000, on_timer) #sets timer to run every 1s return True def cleartime(args=None): global saveseconds saveseconds = 0 ind.set_label(str(timedelta(seconds=0))) gtk.timeout_remove(source_id) return True #format below is category name, icon ind = appindicator.Indicator ("simple-clock-client", "hourglass", appindicator.CATEGORY_APPLICATION_STATUS, dir_path) ind.set_status (appindicator.STATUS_ACTIVE) ind.set_label("Elapses"); #name of program and initial display ##Setup Menu Items menu = gtk.Menu() stop = gtk.MenuItem("Stop") stop.connect("activate", stoptime) stop.show() menu.append(stop) start = gtk.MenuItem("Start") start.connect("activate", starttime) start.show() menu.append(start) clear = gtk.MenuItem("Clear") clear.connect("activate", cleartime) clear.show() menu.append(clear) exit = gtk.MenuItem("Exit") exit.connect("activate", finish) exit.show() menu.append(exit) ind.set_menu(menu) #set the menu with added items gtk.main()