gtkmm图片上的文字

时间:2019-07-01 16:37:15

标签: c++ gtkmm

我想在我的gui中有一个图片元素,上面有文字。我的目标是加载图片(例如水滴),并在其上放置代表所测量的湿度(值来自MQTT)的文本。

什么是最好的方法?我不在乎它是标签还是其他任何元素(尽管我不满意为此使用按钮)。文本需要更改。我对这个框架非常陌生,所以我还没有掌握。

谢谢!

1 个答案:

答案 0 :(得分:1)

这是示例代码。它使用叠加层堆叠两个小部件,即图像和标签:

#include <gtk/gtk.h>

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

  GtkWidget *window;
  GtkWidget *image;
  GtkWidget *label;
  GtkWidget *overlay;

  gtk_init(&argc, &argv);

  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
  gtk_window_set_title(GTK_WINDOW(window), "Sandbox");

  image = gtk_image_new_from_file("image.png");
  label = gtk_label_new("I've always been too lame\n\
To see what's before me\n\
And I know nothing sweeter than\n\
Champaign from last New Years\n\
Sweet music in my ears\n\
And a night full of no fears\n\
\n\
But if I had one wish fulfilled tonight\n\
I'd ask for the sun to never rise\n\
If God passed a mic to me to speak\n\
I'd say \"Stay in bed, world,\n\
Sleep in peace");

  overlay = gtk_overlay_new ();

  gtk_container_add(GTK_CONTAINER(window), overlay);

  gtk_overlay_add_overlay(GTK_OVERLAY(overlay), image);
  gtk_overlay_add_overlay(GTK_OVERLAY(overlay), label);

  g_signal_connect(G_OBJECT(window), "destroy",
        G_CALLBACK(gtk_main_quit), NULL);

  gtk_widget_show_all(window);

  gtk_main();

  return 0;
}