gtk - Touch scrolling causes persistent text field cursor and segmentation fault in entry widgets - Stack Overflow

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I have a sample GTK4 application where a list of entries is arranged vertically in a scrolled window. When I test the application using a mouse by continuously scrolling the window, the app does not crash. However, when I test it on a touch device and click on an entry, a text field cursor appears. This cursor remains visible even while scrolling the window, eventually causing the application to crash with a segmentation fault.

I tried disabling events for the entries using

gtk_widget_set_sensitive(entry, FALSE),

which made the application stable. However, this also disables all interactions with the entries, which is not ideal since I need to enter and retrieve data from them.

Could anyone suggest a way to resolve this issue?

#include <gtk/gtk.h>

GtkWidget *entry[15];
GtkEntryBuffer *buffer[15];


// Focus change handler
static void on_entry_focus_change(GtkWidget *widget, GParamSpec *pspec, gpointer user_data) {
    if (gtk_widget_has_focus(widget)) {
        g_print("Entry gained focus\n");
    } else {
        g_print("Entry lost focus\n");
    }
}


// Scroll handling
void on_scroll(GtkAdjustment *adjustment) {
    double value = gtk_adjustment_get_value(adjustment);
    g_print("Scrolled to: %.2f\n", value);
}

// Create multiple entries
static void activate(GtkApplication *app, gpointer user_data) {
    GtkWidget *window = gtk_application_window_new(app);
    gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
    gtk_window_set_default_size(GTK_WINDOW(window), 500, 800);


    GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
    gtk_window_set_child(GTK_WINDOW(window), box);

    GtkWidget *scrolled_window = gtk_scrolled_window_new();
    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scrolled_window), GTK_POLICY_NEVER, GTK_POLICY_EXTERNAL);
    gtk_scrolled_window_set_kinetic_scrolling(GTK_SCROLLED_WINDOW(scrolled_window), TRUE);
    gtk_widget_set_size_request(scrolled_window, 400, 750);
    gtk_widget_set_margin_start(scrolled_window, 40);
    gtk_widget_set_margin_end(scrolled_window, 40);
    gtk_box_append(GTK_BOX(box), scrolled_window);

    GtkAdjustment *vadj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(scrolled_window));
    GtkAdjustment *hadj = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW(scrolled_window));

    g_signal_connect(vadj, "value-changed", G_CALLBACK(on_scroll), NULL);
    g_signal_connect(hadj, "value-changed", G_CALLBACK(on_scroll), NULL);

    GtkWidget *s_vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 10);
    gtk_scrolled_window_set_child(GTK_SCROLLED_WINDOW(scrolled_window), s_vbox);

    // Create entries
    for (int i = 0; i < 15; i++) {
        buffer[i] = gtk_entry_buffer_new("Initial Text", -1);
        if (buffer[i] == NULL) {
            g_print("Failed to create buffer for entry %d\n", i);
            continue;
        }

        entry[i] = gtk_entry_new_with_buffer(buffer[i]);
        if (entry[i] == NULL) {
            g_print("Failed to create entry %d\n", i);
            continue;
        }

        gtk_widget_set_size_request(entry[i], 396, 60);
        gtk_entry_set_input_hints(GTK_ENTRY(entry[i]), GTK_INPUT_HINT_NO_EMOJI);

        char *placeholder_text = g_strdup_printf("Entry %d", i + 1);
        gtk_entry_set_placeholder_text(GTK_ENTRY(entry[i]), placeholder_text);
        g_free(placeholder_text);

        // Connect focus change signal
        g_signal_connect(entry[i], "notify::has-focus", G_CALLBACK(on_entry_focus_change), NULL);


        gtk_box_append(GTK_BOX(s_vbox), entry[i]);
        g_print("Created entry %d\n", i);
    }

    gtk_window_present(GTK_WINDOW(window));
}

int main(int argc, char *argv[]) {
    GtkApplication *app = gtk_application_new("com.example.GtkMultipleEntries", G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    int status = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);
    return status;
}

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