c GTK3 Text should scoll upward and not hide - c

here is my problem: I just put a gtk_text_view_new() in a gtk_scrolled_window_new(). Now when I write in the textField, at the end of the gtk_widget_set_size_request->high the text is hidden and the whole text does not scroll upwards as I want.
-> The textfield should automatically scroll upwards and show its last line.
#include <gtk/gtk.h>
int main(int argc, char **argv) {
gtk_init(&argc, &argv);
GtkWidget *window;
GtkWidget *myGrid;
GtkWidget *scollwindow;
GtkWidget *textField;
GtkTextBuffer *buffer;
GtkWidget *quitbutton;
//---------------------widgets-------------------------------
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
quitbutton = gtk_button_new_with_label("QUIT");
myGrid = gtk_grid_new ();
//---------------------textField-------------------------------
textField = gtk_text_view_new ();
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textField));
gtk_text_buffer_set_text (buffer, "Hello, this is some text, ", -1);
//---------------------insert textField in scrollwindow-------------------------------
scollwindow = gtk_scrolled_window_new (NULL,NULL);
gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scollwindow), textField);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scollwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_ALWAYS);
//---------------------widgets size-------------------------------
gtk_widget_set_size_request (scollwindow, 200, 200);
gtk_widget_set_size_request (window, 200, 200);
//---------------------grid attache-------------------------------
gtk_grid_attach(GTK_GRID(myGrid), scollwindow, 0, 0, 1, 1);
gtk_grid_attach(GTK_GRID(myGrid), quitbutton, 0, 1, 1, 1);
//---------------------add to grid-------------------------------
gtk_container_add(GTK_CONTAINER(window), myGrid);
//---------------------signals-------------------------------
g_signal_connect(quitbutton, "clicked", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(window, "destroy", gtk_main_quit, NULL);
gtk_widget_show_all(window);
gtk_main();
return 0;
}

Got it, just change line " gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scollwindow), textField);" to "gtk_container_add (GTK_CONTAINER(scollwindow), textField);"

Related

How to change the background color of the line numbers mode in GTK3+?

I'm designing a text editor in C/GTK3+, using the GtkSourceView class to be able to show the line numbers via the method gtk_source_view_set_show_line_numbers. I'm able to modify the background color of textview and text but not that of panel containing line numbers. By default it seems to be white. Can you show me how to modify it?
This is the code:
#include <gtk/gtk.h>
#include <gtksourceview/gtksource.h>
void find (GtkTextView *text_view, const gchar *text, GtkTextIter *iter)
{
GtkTextIter mstart, mend;
GtkTextBuffer *buffer;
gboolean found;
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
found = gtk_text_iter_forward_search (iter, text, 0, &mstart, &mend, NULL);
if (found)
{
gtk_text_buffer_select_range (buffer, &mstart, &mend);
gtk_text_buffer_create_mark (buffer, "last_pos", &mend, FALSE);
}
}
typedef struct App
{
GtkWidget *text_view;
GtkWidget *search_entry;
} App;
/* Called when main window is destroyed. */
void
win_destroy (void)
{
gtk_main_quit();
}
void
next_button_clicked (GtkWidget *next_button, App *app)
{
const gchar *text;
GtkTextBuffer *buffer;
GtkTextMark *last_pos;
GtkTextIter iter;
text = gtk_entry_get_text (GTK_ENTRY (app->search_entry));
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (app->text_view));
last_pos = gtk_text_buffer_get_mark (buffer, "last_pos");
if (last_pos == NULL)
return;
gtk_text_buffer_get_iter_at_mark (buffer, &iter, last_pos);
find (GTK_TEXT_VIEW (app->text_view), text, &iter);
}
/* Called when search button is clicked. */
void
search_button_clicked (GtkWidget *search_button, App *app)
{
const gchar *text;
GtkTextBuffer *buffer;
GtkTextIter iter;
text = gtk_entry_get_text (GTK_ENTRY (app->search_entry));
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (app->text_view));
gtk_text_buffer_get_start_iter (buffer, &iter);
find (GTK_TEXT_VIEW (app->text_view), text, &iter);
}
int
main (int argc, char *argv[])
{
GtkWidget *win;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *search_button;
GtkWidget *next_button;
GtkWidget *swindow;
GtkCssProvider *provider;
GtkStyleContext *context;
App app;
gtk_init (&argc, &argv);
/* Create a window with a search entry, search button and a text
area. */
win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (G_OBJECT (win), "destroy", win_destroy, NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL,0);
gtk_container_add (GTK_CONTAINER (win), vbox);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL,0);
gtk_container_add(GTK_CONTAINER (vbox), hbox);
app.search_entry = gtk_entry_new ();
search_button = gtk_button_new_with_label ("Search");
next_button = gtk_button_new_with_label ("Next");
gtk_container_add(GTK_CONTAINER (hbox), app.search_entry);
gtk_container_add(GTK_CONTAINER (hbox), search_button);
gtk_container_add(GTK_CONTAINER (hbox), next_button);
g_signal_connect (G_OBJECT (search_button), "clicked",
G_CALLBACK (search_button_clicked), &app);
g_signal_connect (G_OBJECT (next_button), "clicked",
G_CALLBACK (next_button_clicked), &app);
/* A scrolled window which automatically displays horizontal and
vertical scrollbars when the text exceeds the text view's size. */
swindow = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (swindow),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_widget_set_vexpand (swindow, TRUE);
gtk_container_add(GTK_CONTAINER (vbox), swindow);
app.text_view = gtk_source_view_new ();
provider = gtk_css_provider_new ();
gtk_css_provider_load_from_data (provider,
"textview{"
"font-size: 30px;"
"font-family: serif;"
"} text{"
"color: green;"
"background: black;"
"}",
-1,
NULL);
context = gtk_widget_get_style_context (app.text_view);
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
gtk_container_add (GTK_CONTAINER (swindow), app.text_view);
gtk_source_view_set_show_line_numbers (GTK_SOURCE_VIEW((app.text_view)), TRUE);
gtk_widget_show_all (win);
gtk_main();
}
There are generally two possibilities.
The typical way this is done is not by changing colors on the GtkSourceView, but to instead use a style scheme with gtk_source_buffer_set_style_scheme(). The style scheme has a "line-number" and "current-line-number" style which can have a color associated with it.
Another way, that is typically only used to show information about marks, is to have a GtkSourceMark with GtkSourceMarkAttributes:background set. Then you can show marks in the gutter.
Generally speaking, when you get to certain levels of complexity, it's just easier to write your own gutter renderer to optimize for the problem space.

How can I add GtkEventBox in scrolled windows layout?

I have a GTK+2 program which combining GtkScrolledWindow and GtkLayout. It works fine. But, I found if I put a GtkEvent object to GtkLayout, it will not display properly. Anybody knows why ? Thanks.
#include <gtk/gtk.h>
int main( int argc, char *argv[] )
{
GtkWidget *window, *button, *layout, *eventbox, *scrollwindow;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request (window, 150, 150);
button = gtk_button_new_with_label ("button");
layout = gtk_layout_new(NULL, NULL);
gtk_layout_set_size( GTK_LAYOUT(layout), 300, 300);
scrollwindow = gtk_scrolled_window_new(GTK_LAYOUT(layout)->hadjustment, GTK_LAYOUT(layout)->vadjustment);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrollwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_layout_put( GTK_LAYOUT(layout), button, 50, 250 );
/* uncomment to use eventbox
eventbox = gtk_event_box_new();
gtk_container_add( GTK_CONTAINER(eventbox), layout);
gtk_scrolled_window_add_with_viewport( GTK_SCROLLED_WINDOW(scrollwindow), eventbox);
*/
// comment this line when use eventbox
gtk_container_add( GTK_CONTAINER(scrollwindow), layout);
gtk_container_add((GtkContainer*)window, scrollwindow);
gtk_widget_show_all(window);
gtk_main ();
return 0;
}
The picture if the eventbox is used.
I found it does not have to use GtkEventBox here. The GtkLayout can capture events directly.
The following widgets do not have an associated window. So, It should be used with the GtkEventBox if you want to capture events.
GtkAlignment
GtkArrow
GtkBin
GtkBox
GtkImage
GtkItem
GtkLabel
GtkPaned
GtkPixmap
GtkScrolledWindow
GtkSeparator
GtkTable
GtkViewport
GtkAspectFrame
GtkFrame
GtkVPaned
GtkHPaned
GtkVBox
GtkHBox
GtkVSeparator
GtkHSeparator
The fixed program :
#include <gtk/gtk.h>
static gboolean button_press_event( GtkWidget *widget, GdkEventButton *event ) {
if (event->button == 1 ) printf("but down %i , %i\n", (int)event->x, (int)event->y);
return TRUE;
}
int main( int argc, char *argv[] )
{
GtkWidget *window, *button, *layout, *eventbox, *scrollwindow;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request (window, 150, 150);
button = gtk_button_new_with_label ("button");
layout = gtk_layout_new(NULL, NULL);
gtk_layout_set_size( GTK_LAYOUT(layout), 300, 300);
scrollwindow = gtk_scrolled_window_new(gtk_layout_get_hadjustment(layout), gtk_layout_get_vadjustment(layout));
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrollwindow), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
gtk_layout_put( GTK_LAYOUT(layout), button, 50, 250 );
gtk_container_add( GTK_CONTAINER(scrollwindow), layout);
gtk_container_add(GTK_CONTAINER(window), scrollwindow);
g_signal_connect (layout, "button_press_event", G_CALLBACK (button_press_event), NULL);
gtk_widget_set_events(layout, GDK_EXPOSURE_MASK
| GDK_LEAVE_NOTIFY_MASK | GDK_BUTTON_PRESS_MASK
| GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK);
gtk_widget_show_all(window);
gtk_main ();
return 0;
}
The result of clicking on GtkLayout :

Menu doesn't display while creating it in GTK+ 3 C

Screenshot of the output
i am new with gtk+. while learning to create menus in gtk+ i simply copy paste the following code and when i run it....i don't know what is the problem but only it shows window. it does not show any menus or menu bar... help me if anyone has been through this problem...
#include <gtk/gtk.h>
GdkPixbuf *create_pixbuf(const gchar * filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_file(filename, &error);
if (!pixbuf) {
fprintf(stderr, "%s\n", error->message);
g_error_free(error);
}
return pixbuf;
}
int main(int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *icon;
GtkWidget *vbox;
GtkWidget *menubar;
GtkWidget *fileMenu;
GtkWidget *fileMi;
GtkWidget *quitMi;
GtkWidget *text_view;
GtkWidget *buffer;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "Write Pad");
gtk_window_set_default_size(GTK_WINDOW(window), 500, 400);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
icon = create_pixbuf("Web.png");
gtk_window_set_icon(GTK_WINDOW(window), icon);
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_add(GTK_CONTAINER(window), vbox);
text_view = gtk_text_view_new ();
gtk_box_pack_start (GTK_BOX (vbox), text_view, 1, 1, 0);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
menubar = gtk_menu_bar_new();
fileMenu = gtk_menu_new();
fileMi = gtk_menu_item_new_with_label("File");
quitMi = gtk_menu_item_new_with_label("Quit");
gtk_menu_item_set_submenu(GTK_MENU_ITEM(fileMi), fileMenu);
gtk_menu_shell_append(GTK_MENU_SHELL(fileMenu), quitMi);
gtk_menu_shell_append(GTK_MENU_SHELL(menubar), fileMi);
gtk_box_pack_start(GTK_BOX(vbox), menubar, FALSE, FALSE, 0);
g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(G_OBJECT(quitMi), "activate", G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
There are a few problems with the code. All of the variables you declare use the GtkWidget * type, while the functions create_pixbuf and gtk_text_view_get_buffer return data of the GdkPixbuf * and GtkTextBuffer * types. You also use a deprecated function.
Moreover, you call the menu related functions after the GtkTextView related functions, thereby placing the menu at the bottom of the window.
Here is the working code:
#include <gtk/gtk.h>
GdkPixbuf *
create_pixbuf (const gchar *filename)
{
GdkPixbuf *pixbuf;
GError *error = NULL;
pixbuf = gdk_pixbuf_new_from_file (filename, &error);
if (!pixbuf) {
fprintf (stderr, "%s\n", error->message);
g_error_free (error);
}
return pixbuf;
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GdkPixbuf *icon;
GtkWidget *vbox;
GtkWidget *menubar;
GtkWidget *fileMenu;
GtkWidget *fileMi;
GtkWidget *quitMi;
GtkWidget *text_view;
GtkTextBuffer *buffer;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
icon = create_pixbuf ("Web.png");
gtk_window_set_title (GTK_WINDOW (window), "Write Pad");
gtk_window_set_default_size (GTK_WINDOW (window), 500, 400);
gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);
gtk_window_set_icon (GTK_WINDOW (window), icon);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
menubar = gtk_menu_bar_new ();
fileMenu = gtk_menu_new ();
fileMi = gtk_menu_item_new_with_label ("File");
quitMi = gtk_menu_item_new_with_label ("Quit");
gtk_menu_item_set_submenu (GTK_MENU_ITEM (fileMi), fileMenu);
gtk_menu_shell_append (GTK_MENU_SHELL (fileMenu), quitMi);
gtk_menu_shell_append (GTK_MENU_SHELL (menubar), fileMi);
gtk_box_pack_start (GTK_BOX (vbox), menubar, FALSE, FALSE, 0);
text_view = gtk_text_view_new ();
gtk_box_pack_start (GTK_BOX (vbox), text_view, TRUE, TRUE, 0);
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
g_signal_connect (G_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL);
g_signal_connect (G_OBJECT (quitMi), "activate", G_CALLBACK (gtk_main_quit), NULL);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}

GTK3 cairo g_signal_connect: Dont get the point [closed]

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i´m trying to fix it out that when i click on "button1" the "on_draw_event"-funcion is called (that works) and a line is shown in my "darea"-drawing_area (that does not work).
Here is my code:
#include <gtk/gtk.h>
static gboolean on_draw_event(GtkWidget *button, cairo_t *darea)
{
printf ("function: on_draw_event\n");
cairo_set_source_rgb(darea, 0, 255, 0);
cairo_set_line_width(darea, 0.5);
cairo_move_to(darea, 0, 100);
cairo_line_to(darea, 400, 100);
cairo_stroke(darea);
return FALSE;
}
int main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *darea;
GtkWidget *myGrid;
GtkWidget *button1;
GtkWidget *button2;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_POPUP);
myGrid = gtk_grid_new ();
darea = gtk_drawing_area_new();
gtk_widget_set_size_request(darea, 400, 400);
button1 = gtk_button_new_with_label ("BUTTON 1");
button2 = gtk_button_new_with_label ("QUIT");
gtk_grid_attach(GTK_GRID(myGrid), button1, 0, 0, 1, 1);
gtk_grid_attach(GTK_GRID(myGrid), darea, 0, 1, 1, 1);
gtk_grid_attach(GTK_GRID(myGrid), button2, 0, 2, 1, 1);
gtk_container_add(GTK_CONTAINER(window), myGrid);
g_signal_connect(G_OBJECT(button2), "clicked", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(button1, "clicked", G_CALLBACK(on_draw_event), darea);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
If i cange
"g_signal_connect(button1, "clicked", G_CALLBACK(on_draw_event), darea);"
to
"g_signal_connect(G_OBJECT(darea), "draw", G_CALLBACK(on_draw_event), NULL);"
the line will be drawn, but i want that it waits for my button click. Hope someone can halp me, cant be a big problem.
Thank you.
As posted, your example crashes because you are connecting a drawing callback to the clicked signal. When called, the callback gets nonsensical arguments and dies.
To "wait for the button click", introduce a flag that tells you whether the button has been clicked. Consult that flag in on_draw_event and set it in the button's clicked callback.
Your example modified to implement the above would look like this:
#include <gtk/gtk.h>
static gboolean on_draw_event(GtkWidget *darea, cairo_t *cr,
gboolean *draw_line)
{
if (!*draw_line)
return FALSE;
printf ("function: on_draw_event\n");
cairo_set_source_rgb(cr, 0, 255, 0);
cairo_set_line_width(cr, 0.5);
cairo_move_to(cr, 0, 100);
cairo_line_to(cr, 400, 100);
cairo_stroke(cr);
return FALSE;
}
static void on_button1_clicked(GtkWidget *button, gboolean *draw_line)
{
*draw_line = TRUE;
/* Make sure the widget is repainted after the click.
gtk_widget_queue_draw() should better be invoked with just the
drawing area, but this code accesses the common parent for
simplicity. Passing darea in a struct whose address is provided as
user_data (along with gboolean *draw_line) is left as exercise. */
gtk_widget_queue_draw(gtk_widget_get_parent(button));
}
int main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *darea;
GtkWidget *myGrid;
GtkWidget *button1;
GtkWidget *button2;
gboolean draw_line = FALSE;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_POPUP);
myGrid = gtk_grid_new ();
darea = gtk_drawing_area_new();
gtk_widget_set_size_request(darea, 400, 400);
button1 = gtk_button_new_with_label ("BUTTON 1");
button2 = gtk_button_new_with_label ("QUIT");
gtk_grid_attach(GTK_GRID(myGrid), button1, 0, 0, 1, 1);
gtk_grid_attach(GTK_GRID(myGrid), darea, 0, 1, 1, 1);
gtk_grid_attach(GTK_GRID(myGrid), button2, 0, 2, 1, 1);
gtk_container_add(GTK_CONTAINER(window), myGrid);
g_signal_connect(G_OBJECT(button2), "clicked", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(button1, "clicked", G_CALLBACK(on_button1_clicked), &draw_line);
g_signal_connect(G_OBJECT(darea), "draw", G_CALLBACK(on_draw_event), &draw_line);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
gtk_widget_show_all(window);
gtk_main();
return 0;
}

drawing on window using gtk 2.0

I have a program using pthreads. I want add an interface using gtk2.0, but have a problem with drawing on window. When I call g_signal_connect(G_OBJECT(window), "configure_event",G_CALLBACK(draw_things), NULL);
lines which I draw appear and at once disappear. If I move a window calling function
gtk_window_move (GTK_WINDOW(widget), 10,10);
or by means of a mouse, lines appear. If I call g_signal_connect(G_OBJECT(window), "expose_event", G_CALLBACK(draw_things), NULL); my lines are displayed correctly, but buttons and labels are not displayed. My code looks like this:
int main(int argc, char *argv[]){
pthread_t tr1;
pthread_t tr2;
pthread_t *trs;
int rc = 0;
type j;
int16_t *id;
type Stop_Point;
GtkWidget *window;
GtkWidget *button;
GtkWidget *table;
GtkWidget *drawing_area;
g_thread_init (NULL);
gdk_threads_init ();
gdk_threads_enter ();
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request(window, width/1.6, height/1.33);
gtk_window_set_position(GTK_WINDOW(window), -1);
gtk_window_set_title (GTK_WINDOW (window), "Window");
g_signal_connect (G_OBJECT (window), "delete_event", G_CALLBACK (delete_event), NULL);
gtk_container_set_border_width (GTK_CONTAINER (window), 2);
table = gtk_table_new ( width/1.6, height/1.33, TRUE);
gtk_container_add (GTK_CONTAINER (window), table);
button = gtk_button_new_with_label ("next >>");
gtk_table_attach_defaults (GTK_TABLE (table), button, 1110, 1190, 750, 790);
gtk_widget_show (button);
button = gtk_button_new_with_label ("<< prev");
gtk_table_attach_defaults (GTK_TABLE (table), button, 1020, 1100 , 750, 790);
gtk_widget_show (button);
rc = pthread_create(&tr1, NULL, tr1_func, &id);
rc = pthread_create(&Generator, NULL, tr2_func, &Stop_Point);
trs = (pthread_t*)malloc(Num * sizeof(pthread_t));
for(j = 0; j < Num; j++) {
rc = pthread_create(trs + j, NULL, trs_func, id + j);
}
// g_signal_connect(G_OBJECT(window), "configure-event", GTK_SIGNAL_FUNC(draw_things), NULL);
g_signal_connect(G_OBJECT(window), "expose_event", G_CALLBACK(draw_things), NULL);
gtk_widget_show_all (window);
gtk_main ();
gdk_threads_leave ();
return 0;
}
Fnction for drawing looks like this
gboolean draw_things(GtkWidget *widget, GdkEventExpose *event, gpointer data) {
GdkGC *gc;
gc=gdk_gc_new(GDK_DRAWABLE(widget->window));
gdk_gc_set_line_attributes(gc, 5, GDK_LINE_SOLID, GDK_CAP_ROUND, GDK_JOIN_ROUND);
gdk_draw_line(GDK_DRAWABLE(widget->window), gc, 5, 35, 1200, 35);
gdk_draw_line(GDK_DRAWABLE(widget->window), gc, 1170, 45, 1200, 35);
gdk_draw_line(GDK_DRAWABLE(widget->window), gc, 1170, 25 , 1200, 35);
// gtk_window_move (GTK_WINDOW(widget), 1,1);
return TRUE;
}
Any help is welcomed, because now I use "configure_event" and call gtk_window_move (GTK_WINDOW(widget), 0,0); every time when I need to draw the picture.

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