Hi Vincent, here is the full code including my unsuccessful attempt, with your suggestion, it compiles and runs but doesn’t show the image, only some text and a cairo line. You will need to put a .png file into the working directory and it can be compiled with:
gcc -rdynamic -Wall `pkg-config --cflags gtk+-3.0` -o filename filename.c `pkg-config --libs gtk+-3.0`
#include <stdio.h>
#include <gtk/gtk.h>
#define WINDOW_ISIZE 1200
#define WINDOW_JSIZE 720
struct main_struct
{
GtkWidget *da_filz, *window;
};
void app_activate(GtkApplication *app, struct main_struct *stuff);
gboolean draw_filz(GtkWidget *da_filz, cairo_t *cr, struct main_struct *stuff);
int main(int argc, char **argv)
{
GtkApplication *app;
int status;
int i, j;
struct main_struct stuff = {
.da_filz=NULL
};
app=gtk_application_new("com.email.name.my.appname", G_APPLICATION_FLAGS_NONE);
g_signal_connect(app, "activate", G_CALLBACK(app_activate), &stuff);
status=g_application_run(G_APPLICATION(app), argc, argv);
g_object_unref(app);
return(status);
}/*End of main()****************************************/
/*Start of app_activate()***********************************/
void app_activate(GtkApplication *app, struct main_struct *stuff)
{
GtkWidget *window=gtk_application_window_new(GTK_APPLICATION(app));
gtk_window_set_title(GTK_WINDOW(window), "My App");
gtk_window_set_default_size(GTK_WINDOW(window),
WINDOW_ISIZE, WINDOW_JSIZE);
gtk_container_set_border_width(GTK_CONTAINER(window), 10);
stuff->window = window;
GtkWidget *box1 = gtk_box_new(TRUE, 5);
GtkAccelGroup *group = gtk_accel_group_new();
GtkWidget *menubar = gtk_menu_bar_new();
GtkWidget *da_filz = gtk_drawing_area_new();
gtk_widget_set_size_request (da_filz, 800, 800);
gtk_widget_set_hexpand(da_filz, TRUE);
gtk_widget_set_vexpand(da_filz, TRUE);
stuff->da_filz=da_filz;
GtkWidget *swin_textview1_stuff = gtk_scrolled_window_new(NULL, NULL);
gtk_widget_set_size_request (swin_textview1_stuff, 400, 300);
gtk_widget_set_hexpand(swin_textview1_stuff, TRUE);
gtk_widget_set_vexpand(swin_textview1_stuff, TRUE);
/*gtk_container_add (GTK_CONTAINER (swin_textview1_stuff), stuff->textview1_stuff);*/
GtkWidget *swin_filz_da_filz = gtk_scrolled_window_new (NULL, NULL);
gtk_widget_set_size_request (swin_filz_da_filz, 300, 100);
gtk_widget_set_hexpand(swin_filz_da_filz, TRUE);
gtk_widget_set_vexpand(swin_filz_da_filz, TRUE);
gtk_container_set_border_width (GTK_CONTAINER (swin_filz_da_filz), 5);
gtk_container_add (GTK_CONTAINER (swin_filz_da_filz), da_filz);
g_signal_connect(da_filz, "draw", G_CALLBACK(draw_filz), stuff);
GtkWidget *grid_2=gtk_grid_new();
GtkWidget *grid_filz=gtk_grid_new();
GtkWidget *grid_filz_spins=gtk_grid_new();
GtkWidget *swin_filz_spins = gtk_scrolled_window_new (NULL, NULL);
gtk_widget_set_size_request (swin_filz_spins, 400, 300);
gtk_widget_set_hexpand(swin_filz_spins, TRUE);
gtk_widget_set_vexpand(swin_filz_spins, TRUE);
gtk_container_set_border_width (GTK_CONTAINER (swin_filz_spins), 5);
gtk_container_add (GTK_CONTAINER (swin_filz_spins), grid_filz_spins);
gtk_grid_attach(GTK_GRID(grid_filz), swin_textview1_stuff, 0, 4, 5, 1);
gtk_grid_attach(GTK_GRID(grid_filz), swin_filz_da_filz, 0, 8, 1, 1);
GtkWidget *notebook = gtk_notebook_new();
GtkWidget *label1 = gtk_label_new("label1");
GtkWidget *label2 = gtk_label_new("label2");
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), grid_filz, label1);
gtk_notebook_append_page (GTK_NOTEBOOK (notebook), grid_2, label2);
gtk_box_pack_start (GTK_BOX(box1), menubar, FALSE, TRUE, 0);
gtk_box_pack_start (GTK_BOX(box1), notebook, TRUE, TRUE, 0);
gtk_container_add (GTK_CONTAINER (window), box1);
gtk_window_add_accel_group(GTK_WINDOW(window), group);
gtk_widget_show_all(window);
}/*End of app_activate()**********************************************************/
gboolean draw_filz (GtkWidget *da_filz, cairo_t *cr, struct main_struct *stuff)
{
GtkStyleContext *context;
context = gtk_widget_get_style_context (da_filz);
int x_length = gtk_widget_get_allocated_width (da_filz);
int y_width_filz = gtk_widget_get_allocated_height (da_filz);
/*gtk_render_background (context, cr, 0, 0, x_length, y_width_filz);
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
cairo_paint(cr);*/
/*You will need to put a .png file into the working directory*/
GdkPixbuf *image2 = gdk_pixbuf_new_from_file("mypixbuf.png", NULL);
gdk_cairo_set_source_pixbuf(cr, image2, x_length, y_width_filz);
gtk_render_background (context, cr, 0, 0, x_length, y_width_filz);
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
cairo_paint(cr);
char str_sometext[20];
sprintf(str_sometext, "Some text.");
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
cairo_move_to(cr, 10, 10);
cairo_show_text(cr, str_sometext);
cairo_set_line_width(cr, 1.0);
cairo_move_to(cr, 100, 100);
cairo_line_to(cr, 253, 226);
cairo_stroke(cr);
return FALSE;
}
