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如何在 UI 上调用更改。例如更改进度条，如此按钮单击处理程序上所示：

void view1_Button_onclicked(uib_view1_view_context *vc, Evas_Object *obj, void *event_info)
{
    eext_circle_object_value_set(vc->progressbar1, 50.0);
    sleep(2); //or do anything intensive like network load
    eext_circle_object_value_set(vc->progressbar1, 100.0);
}
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1 回答 1

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EFL UI 基本上只在一个线程的主循环上工作。

因此，在您完成事件函数中的某些工作之前，EFL 系统无法绘制 UI。

您可以为您的工作创建另一个线程并在事件函数中启动线程。

但使用 ecore 空闲函数来使用 eext_circle_object_value_set。

大多数 EFL 和 tizen 函数必须在主线程中使用。

所以在另一个线程中运行你的工作，并使用ecore主循环函数向主线程请求进度值设置器。

EFL Ecore 为主循环的请求作业提供同步和异步功能。 ecore_main_loop_thread_safe_call_async并且 ecore_main_loop_thread_safe_call_sync可以用来代替 ecore_idle 函数。

所以这里是一个简单的例子，初级进度。我在此源中不使用 eext 函数，但您可以参考 elm_progressbar_value_set 而不是 eext。

#include <Elementary.h>

struct progresses
{
  Evas_Object *moving;
  Evas_Object *status;
};

struct progress_with_value
{
  Evas_Object *progress;
  double value;
};

static void* progress_setter_async(void *data)
{
  struct progress_with_value *pv = data;
  elm_progressbar_value_set(pv->progress, pv->value);
  return NULL;
}

static void some_job_cb(void *data, Ecore_Thread *thread)
{
  int i=0;
  struct progresses *p = data;

  struct progress_with_value pv_moving = {p->moving, 0.0};
  struct progress_with_value pv_status = {p->status, 0.0};

  ecore_main_loop_thread_safe_call_sync(progress_setter_async, &pv_moving); 
  ecore_main_loop_thread_safe_call_sync(progress_setter_async, &pv_status); 

  while (i++<=10)
  {
    usleep(200000);
    pv_moving.value = i * 0.1;
    ecore_main_loop_thread_safe_call_sync(progress_setter_async, &pv_moving); 
  }

  pv_status.value = 1.0;
  ecore_main_loop_thread_safe_call_sync(progress_setter_async, &pv_status); 
}

static void on_clicked_cb(void *data, Evas_Object *obj, void *event_info)
{
  ecore_thread_run(some_job_cb, NULL, NULL, data);
}

int main(int argc, char* argv[])
{
  Evas_Object *win;

  elm_init(argc, argv);
  elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED);

  win = elm_win_add(NULL, "sample", ELM_WIN_BASIC);
  elm_win_title_set(win, "Sample");
  elm_win_autodel_set(win, EINA_TRUE);
  evas_object_resize(win, 800, 600);
  evas_object_show(win);


  Evas_Object *box = elm_box_add(win);
  evas_object_resize(box, 800, 600);
  evas_object_show(box);

  Evas_Object *btn = elm_button_add(win);
  elm_object_text_set(btn, "Start Progress 0.0 to 1.0");
  evas_object_show(btn);
  elm_box_pack_end(box, btn);

  Evas_Object *wheel = elm_progressbar_add(win);
  elm_object_style_set(wheel, "wheel");
  elm_progressbar_pulse_set(wheel, EINA_TRUE);
  elm_progressbar_pulse(wheel, EINA_TRUE);
  evas_object_show(wheel);
  elm_box_pack_end(box, wheel);

  struct progresses p;
  p.moving = elm_progressbar_add(win);
  p.status = elm_progressbar_add(win);
  evas_object_show(p.moving);
  evas_object_show(p.status);
  evas_object_size_hint_align_set(p.moving, EVAS_HINT_FILL, 0.5);
  evas_object_size_hint_align_set(p.status, EVAS_HINT_FILL, 0.5);
  elm_box_pack_end(box, p.moving);
  elm_box_pack_end(box, p.status);

  evas_object_smart_callback_add(btn, "clicked", on_clicked_cb, &p);

  elm_run();
  elm_shutdown();

  return 0;
}
于 2016-08-07T01:18:18.857 回答