I am learning GTK and developing a small application, which uses gtktextview
In my application, I compile it well. When running it, clicking the texview and
"Gdk-WARNING **: gdkwindow-win32.c:1834: SetWindowLongPtr failed: Invalid
window handle" occurs.
Then I find an example on internet as follows. The same error occurs.
In addition, I find this problem was raised before. But I can't find any
solution. I would like to have your help. Your help is appreciated in advance.
static void activate (GtkApplication *app, gpointer user_data)
/* Declare variables */
/* Create a window with a title, and a default size */
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "TextView Example");
gtk_window_set_default_size (GTK_WINDOW (window), 220, 200);
/* The text buffer represents the text being edited */
buffer = gtk_text_buffer_new (NULL);
/* Text view is a widget in which can display the text buffer.
* The line wrapping is set to break lines in between words.
text_view = gtk_text_view_new_with_buffer (buffer);
gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (text_view), GTK_WRAP_WORD);
/* Create the scrolled window. Usually NULL is passed for both parameters so
* that it creates the horizontal/vertical adjustments automatically. Setting
* the scrollbar policy to automatic allows the scrollbars to only show up
* when needed.
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
/* The function directly below is used to add children to the scrolled window
* with scrolling capabilities (e.g text_view), otherwise,
* gtk_scrolled_window_add_with_viewport() would have been used
gtk_container_add (GTK_CONTAINER (scrolled_window), text_view);
gtk_container_set_border_width (GTK_CONTAINER (scrolled_window), 5);
gtk_container_add (GTK_CONTAINER (window), scrolled_window);
int main (int argc, char **argv)
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
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