X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fui%2Fgui%2Fcompute-dialog.c;h=2dd1b8f628eacd41168adee33f2f127d15cc2e50;hb=0bd0098aec2ee31d9460c8d4c1263d0b5ccc4324;hp=9d3e0b4671b35dc08f7c02d7a0838f17a99169c8;hpb=97a777315ec2f2000ac67da1f405323a5e2294e2;p=pspp-builds.git

diff --git a/src/ui/gui/compute-dialog.c b/src/ui/gui/compute-dialog.c
index 9d3e0b46..2dd1b8f6 100644
--- a/src/ui/gui/compute-dialog.c
+++ b/src/ui/gui/compute-dialog.c
@@ -34,12 +34,14 @@ static void function_list_populate (GtkTreeView *tv);
 
 static void insert_function_into_syntax_area (GtkTreeIter iter,
 					      GtkWidget *text_view,
-					      GtkTreeModel *model
+					      GtkTreeModel *model,
+					      gpointer data
 					      );
 
 static void insert_source_row_into_text_view (GtkTreeIter iter,
 					      GtkWidget *dest,
-					      GtkTreeModel *model
+					      GtkTreeModel *model,
+					      gpointer data
 					      );
 
 
@@ -176,7 +178,7 @@ generate_syntax (const struct compute_dialog *cd)
 
   string = g_string_sized_new (64);
 
-  if ( cd-> use_type && 
+  if ( cd-> use_type &&
        NULL == psppire_dict_lookup_var (cd->dict, target_name ))
     {
       if ( gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (string_toggle)))
@@ -199,11 +201,13 @@ generate_syntax (const struct compute_dialog *cd)
 			    target_name,
 			    label);
 
-  g_string_append_printf (string, "COMPUTE %s = %s.",
+  g_string_append_printf (string, "COMPUTE %s = %s.\n",
 			  target_name,
 			  expression
 			  );
 
+  g_string_append (string, "EXECUTE.\n");
+
   text = string->str;
 
   g_string_free (string, FALSE);
@@ -327,6 +331,28 @@ on_expression_toggle (GtkToggleButton *button, gpointer data)
     }
 }
 
+
+/* Return TRUE if the dialog box's widgets' state are such that clicking OK
+   might not result in erroneous syntax being generated */
+static gboolean
+contents_plausible (gpointer data)
+{
+  struct compute_dialog *cd = data;
+
+  GtkWidget *target      = get_widget_assert (cd->xml, "compute-entry1");
+  GtkWidget *syntax_area = get_widget_assert (cd->xml, "compute-textview1");
+  GtkTextBuffer *buffer  =
+    gtk_text_view_get_buffer (GTK_TEXT_VIEW (syntax_area));
+
+  if ( 0 == strcmp ("", gtk_entry_get_text (GTK_ENTRY (target))))
+    return FALSE;
+
+  if ( gtk_text_buffer_get_char_count (buffer) == 0 )
+    return FALSE;
+
+  return TRUE;
+}
+
 /* Pops up the Compute dialog box */
 void
 compute_dialog (GObject *o, gpointer data)
@@ -359,6 +385,7 @@ compute_dialog (GObject *o, gpointer data)
 
   vs = PSPPIRE_VAR_STORE (gtk_sheet_get_model (var_sheet));
 
+
   scd.dict = vs->dict;
   scd.use_type = FALSE;
 
@@ -376,6 +403,7 @@ compute_dialog (GObject *o, gpointer data)
   psppire_selector_set_subjects (PSPPIRE_SELECTOR (var_selector),
 				 dict_view, syntax_area,
 				 insert_source_row_into_text_view,
+				 NULL,
 				 NULL);
 
 
@@ -384,11 +412,15 @@ compute_dialog (GObject *o, gpointer data)
   psppire_selector_set_subjects (PSPPIRE_SELECTOR (func_selector),
 				 functions, syntax_area,
 				 insert_function_into_syntax_area,
+				 NULL,
 				 NULL);
 
 
   scd.xml = xml;
 
+  psppire_dialog_set_valid_predicate (PSPPIRE_DIALOG (dialog),
+				      contents_plausible, &scd);
+
   g_signal_connect (target, "changed", G_CALLBACK (on_target_change), &scd);
 
   g_signal_connect (dialog, "refresh", G_CALLBACK (refresh),  &scd);
@@ -499,7 +531,8 @@ function_list_populate (GtkTreeView *tv)
 static void
 insert_function_into_syntax_area (GtkTreeIter iter,
 				  GtkWidget *text_view,
-				  GtkTreeModel *model
+				  GtkTreeModel *model,
+				  gpointer data
 				  )
 {
   GString *string;
@@ -562,7 +595,8 @@ insert_function_into_syntax_area (GtkTreeIter iter,
 static void
 insert_source_row_into_text_view (GtkTreeIter iter,
 				  GtkWidget *dest,
-				  GtkTreeModel *model
+				  GtkTreeModel *model,
+				  gpointer data
 				  )
 {
   GtkTreePath *path;