Re: Trouble setting the value of a GtkAdjustment

[cecashon aol com]

Hi Richard,

It looks like how you add containers makes a difference in this case. Also the window placement might have to 
be adjusted after the window is shown. Here is a try at it.

Eric


//gcc -Wall adj1.c -o adj1 `pkg-config --cflags --libs gtk+-3.0`
//Tested on Ubuntu16.04 and GTK3.18

#include<gtk/gtk.h>

int main(int argc, char **argv)
 {
   gtk_init(&argc, &argv);

   GtkWidget *keyboard_window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title(GTK_WINDOW(keyboard_window), "Keyboard Window");
   gtk_window_set_default_size(GTK_WINDOW(keyboard_window), 200, 200);
   gtk_window_set_position(GTK_WINDOW(keyboard_window), GTK_WIN_POS_CENTER);
   g_signal_connect(keyboard_window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

   GtkWidget *label=gtk_label_new("Label");
   gtk_widget_set_size_request(label, 400, 400);

   //GtkAdjustment *ADJ = gtk_adjustment_new (1.5, 0.0, 2.0, 0.01, 0.01, 0.01);
   //GtkWidget *sw = gtk_scrolled_window_new (ADJ , gtk_adjustment_new (1.5, 0.0, 2.0, 0.01, 0.01, 0.01));
   GtkAdjustment *ADJ = gtk_adjustment_new (100.0, 0.0, 400.0, 0.0, 0.0, 0.0);
   GtkWidget *sw = gtk_scrolled_window_new (ADJ , ADJ);

   //gtk_adjustment_set_value (ADJ, 1.22222);
   g_print ("value %p is %f\n", ADJ, gtk_adjustment_get_value (ADJ));

   GtkWidget *keyboard=gtk_grid_new();
   gtk_grid_attach(GTK_GRID(keyboard), label, 0, 0, 1, 1);
   gtk_container_add(GTK_CONTAINER(sw), keyboard);  
   gtk_container_add(GTK_CONTAINER(keyboard_window), sw);

   //gtk_container_add(GTK_CONTAINER(keyboard_window), sw);
   //GtkWidget *keyboard=gtk_grid_new();
   //gtk_grid_attach(GTK_GRID(keyboard), label, 0, 0, 1, 1);  
   //gtk_container_add(GTK_CONTAINER(sw), keyboard);

   gtk_widget_show_all(keyboard_window);

   gtk_adjustment_set_value (ADJ, 100.0);

   gtk_main();

   return 0;  
 }