如何在调整大小和移动属性工作的情况下创建没有标题栏的 gtk+ windows

Question

How to create gtk+ windows without title bar with resize and move properties working. I checked gtk_window_set_decorated function, but it disable resize and move features of window. I found this answer already , but I don't think it has anything to do with it.

I tried to set resizeable true after gtk_window_set_decorated but still not working

Please check code

    #include <gtk/gtk.h>
    int main (int argc,
    char *argv[])
    {  
      GtkWidget *window;
      /* Initialize GTK+ and all of its supporting libraries. */
      gtk_init (&argc, &argv);
      /* Create a new window, give it a title and display it to the user. */
      window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
      gtk_window_set_title (GTK_WINDOW (window), "Hello World");
      gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
      gtk_window_set_resizable (GTK_WINDOW (window), TRUE);
      //gtk_window_set_gravity(GTK_WINDOW (window), GDK_GRAVITY_NORTH_EAST);
      //gtk_window_set_deletable (GTK_WINDOW (window), FALSE);
      gtk_widget_show (window);
      /* Hand control over to the main loop. */
      gtk_main ();
      return 0;
    }

Answer 1

So what I found to work is to remove the header with gtk_window_set_decorated set to FALSE. Then manually change the cursor and call gtk_window_begin_resize_drag() to begin a resize on mousedown.

How I implemented this was to check if the mouse was near a border on a mousemove callback and if so change the cursor with gdk_window_set_cursor() .

On a mousedown event near a border I call gtk_window_begin_resize_drag() with the appropriate border.

Answer 2

you can use GTK_WINDOW_POPUP:

#include <gtk/gtk.h>
    int main (int argc,
    char *argv[])
    {  
      GtkWidget *window;
      /* Initialize GTK+ and all of its supporting libraries. */
      gtk_init (&argc, &argv);
      gtk_widget_show (window);
      gtk_main ();
      return 0;
    }

You should not use GTK_WINDOW_POPUP if you only want window manager decorations turned off for the window. Instead, use gtk_window_set_decorated (GtkWindow *window, gboolean show) to turn off window decorations.