Re: Problems with GTK+ .99.8 and Imlib 1.1

[raster redhat com]

On 23 Mar, Derek Simkowiak shouted:
->      Hello,
->  	First, a quick note before I forget: doing a "make install" with
->  GTK+ .99.8 did not copy the file glibconfig.h into /usr/local/include/, I
->  had to do it myself.  I just thought that was weird.
->  
->  	Anyhow, on to the real problem(s): I am trying to learn GTK+ and
->  Imlib, so I wrote the attached imageviewer program (it's crappy, but it's
->  only meant for me as a learning tool, and not for general use).  I can
->  get it to compile, but I have the following problem:
->  
->  	Imlib loads the image just fine, but about 50% of the time that 
->  I run the program it displays a blank, grey window instead of the JPG (or
->  GIF, or whatever) I loaded.  It seems almost random in when it works and
->  when it doesn't.

have you gotten the absolute latest imlbi from the cvs archive (where
gtk, gnome imlib etc. reside)? get that first.. it will most likely fix
all your problems.. :)

->  	This is probably some sort of buffer problem (I feel like a newbie
->  trying to figure out getc() ) but I'd really like to understand what's
->  going on.  
->  
->  	The second issue may be a bug in .99.8, because it works just fine
->  when compiled using .99.5.  Clicking the "close" button from my window
->  manager no longer exits the program, I have to kill it.  It worked just
->  fine in .99.5.  See the code below for details (I think I'm catching all
->  the right signals...).
->  
->  	Anyhow, I think GNOME (with GTK) is the greatest thing since
->  sliced bread, and I really want to understand what I'm doing wrong.
->  Please take a minute to compile this program, reproduce the errors, and
->  look at the code (because there might be a problem with GTK or Imlib,
->  although it's probably just a crappy programming job on my part).
->  
->  Thank You,
->  Derek Simkowiak
->  dereks@blarg.net
->  
->  play.c is attached as MIME, and also listed below for quick viewing:
->  --------------------------------------------------------------------
->  #include <gtk/gtk.h>
->  #include <gdk_imlib.h>
->  
->  /* When the button is pushed, a file selection box appears, gets the 
->     desired filename, and then that particular file is displayed by
->     Imlib. */
->  
->  void
->  file_selection_ok (GtkWidget        *w,
->  		   GtkFileSelection *fs)
->  {
->      GdkPixmap *pixmap /*, *mask*/;    /* I'm just ignoring the mask for now */
->      GdkImlibImage *image;
->      gint width, height;
->  
->      GtkWidget *event_box;	/* an event window for the pixmap */
->      GtkWidget *window;		/* a window widget for the event_box */
->      GtkWidget *gtk_pixmap;	/* our gtk-level pixmap */
->  
->       g_print ("%s was selected, attempting to load...\n", gtk_file_selection_get_filename (GTK_FILE_SELECTION (fs)));
->       
->       /* The image loading seems to go successfully */
->       image = gdk_imlib_load_image(gtk_file_selection_get_filename (GTK_FILE_SELECTION (fs)));
->       
->       width = image->rgb_width; height = image -> rgb_height;
->       
->       gdk_imlib_render(image, width, height);
->       pixmap = gdk_imlib_move_image(image);
->       
->       event_box = gtk_event_box_new();
->       window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
->       
->       /*  I'm just ignoring the Mask for now.  */
->       gtk_pixmap = gtk_pixmap_new(pixmap, NULL);
->  
->       
->       gtk_window_set_title (GTK_WINDOW (window), "Here's your damned file:");
->       gtk_signal_connect (GTK_OBJECT (window), "delete_event", GTK_SIGNAL_FUNC (gtk_widget_destroy), GTK_OBJECT(window));
->       gtk_signal_connect (GTK_OBJECT (window), "destroy", GTK_SIGNAL_FUNC (gtk_widget_destroy), GTK_OBJECT(window));
->  
->       gtk_container_add (GTK_CONTAINER(event_box), gtk_pixmap);
->       gtk_container_add (GTK_CONTAINER(window), event_box);
->  
->  
->       gtk_widget_show (gtk_pixmap);
->       gtk_widget_show (event_box);
->       
->       /* I don't know what "gtk_widget_realize" does, but I thought
->         I'd see if it would fix the problem.  It doesn't.  */
->       gtk_widget_realize (gtk_pixmap);
->       gtk_widget_realize (event_box);
->       gtk_widget_realize (window);
->       
->       /* Now show our image */
->       gtk_widget_show(window);
->       
->       /* This just deletes the file selection window */
->       gtk_widget_destroy (GTK_WIDGET (fs));
->  
->  }
->  
->  
->  void button_pushed(GtkWidget *widget)
->  {
->  	GtkWidget *filew;   /* this is our new File Selection widget that
->  			    gets created when we click the button */
->  
->  	filew = gtk_file_selection_new ("Select a freakin' file");
->  	
->  	gtk_signal_connect (GTK_OBJECT (filew), "destroy", 
->  				(GtkSignalFunc) gtk_widget_destroy, &filew);
->  
->  	gtk_signal_connect_object (GTK_OBJECT (GTK_FILE_SELECTION (filew)->cancel_button),
->                                      "clicked", (GtkSignalFunc) gtk_widget_destroy,
->                                      GTK_OBJECT (filew));
->  
->  
->  	/* set a cool default filename */
->  	gtk_file_selection_set_filename (GTK_FILE_SELECTION(filew), 
->                                            "penguin.png");
->  
->  
->  	gtk_signal_connect (GTK_OBJECT (GTK_FILE_SELECTION (filew)->ok_button),
->                               "clicked", GTK_SIGNAL_FUNC (file_selection_ok), GTK_FILE_SELECTION(filew) );
->  
->  
->  	gtk_widget_show(filew);
->  
->  }
->  
->  gint delete_event (GtkWidget *widget)
->  {
->  	return TRUE;
->  }
->  
->  
->  int main(int argc, char *argv[])
->  {
->      GtkWidget *window;		/* Our main application window */
->      GtkWidget *button;		/* the only widget in the whole main window */
->      GtkWidget *box;		/* Not really necessary, just used it anyway */
->      
->  
->      gtk_init(&argc, &argv);
->  
->  /* Imlib initialization fxns */
->      gdk_imlib_init();
->      gtk_widget_push_visual(gdk_imlib_get_visual());
->      gtk_widget_push_colormap(gdk_imlib_get_colormap());
->      
->      
->      window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
->  
->  /* These next two lines quit working when I went from GTK+.99.5 to .99.8,
->     and I don't know why.  Anyone have any ideas? */   
->      gtk_signal_connect(GTK_OBJECT (window), "delete_event", GTK_SIGNAL_FUNC(delete_event), NULL);
->      gtk_signal_connect(GTK_OBJECT (window), "destroy", GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
->      
->      box = gtk_vbox_new(FALSE,0);   /* again, not really necessary */
->      
->      gtk_container_add(GTK_CONTAINER(window), box);
->      gtk_container_border_width(GTK_CONTAINER(window), 5);
->  
->      button = gtk_button_new_with_label("Open File");
->      gtk_signal_connect(GTK_OBJECT (button), "clicked", GTK_SIGNAL_FUNC(button_pushed), NULL);
->  
->      /* Now we PACK the button into the box */
->      gtk_box_pack_start(GTK_BOX(box), button, TRUE, TRUE, 0);
->      gtk_widget_show(button);
->  
->  
->      gtk_widget_show(box);
->      gtk_widget_show(window);
->    
->      gtk_main();
->      
->      return 0;
->  }
->  
->  

-- 
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