* mug.c: show error dialogs for errors; focus query when there was a parse error

src/mu-result.h

@@ -29,7 +29,7 @@ enum _MuResult {
 	MU_ERROR_QUERY,
 	MU_ERROR_INTERNAL,
 	
-	MU_ERROR	/* some error occured */
+	MU_ERROR	/* some other error occured */
 
 	
 

toys/mug/mug-msg-list-view.c

@@ -30,6 +30,7 @@ static void mug_msg_list_view_finalize   (GObject *obj);
 /* list my signals  */
 enum {
 	MUG_MSG_SELECTED,
+	MUG_ERROR_OCCURED,
 	LAST_SIGNAL
 };
 
@@ -87,6 +88,15 @@ mug_msg_list_view_class_init (MugMsgListViewClass *klass)
 			      NULL, NULL,
 			      g_cclosure_marshal_VOID__STRING,
 			      G_TYPE_NONE, 1, G_TYPE_STRING);
+	signals[MUG_ERROR_OCCURED] = 
+		g_signal_new ("error-occured",
+			      G_TYPE_FROM_CLASS(gobject_class),
+			      G_SIGNAL_RUN_FIRST,
+			      G_STRUCT_OFFSET(MugMsgListViewClass,
+					      error_occured),
+			      NULL, NULL,
+			      g_cclosure_marshal_VOID__UINT,
+			      G_TYPE_NONE, 1, G_TYPE_UINT);
 }
 
 
@@ -308,8 +318,25 @@ empty_or_display_contact (const gchar* str)
 	
 }
 
+static MugError
+mu_result_to_mug_error (MuResult r)
+{
+	switch (r) {
+	case MU_ERROR_XAPIAN_DIR:
+		return MUG_ERROR_XAPIAN_DIR;
+	case MU_ERROR_XAPIAN_NOT_UPTODATE:
+		return MUG_ERROR_XAPIAN_NOT_UPTODATE;
+	case MU_ERROR_QUERY:
+		return MUG_ERROR_QUERY;
+	default:
+		return MUG_ERROR_OTHER;
+	}
+}
+
+
 static MuMsgIter *
-run_query (const char *xpath, const char *query)
+run_query (const char *xpath, const char *query,
+	   MugMsgListView *self)
 {
 	GError *err;
 	MuQuery *xapian;
@@ -319,6 +346,9 @@ run_query (const char *xpath, const char *query)
 	xapian = mu_query_new (xpath, &err);
 	if (!xapian) {
 		g_warning ("Error: %s", err->message);
+		g_signal_emit (G_OBJECT(self),
+			       signals[MUG_ERROR_OCCURED], 0,
+			       mu_result_to_mug_error (err->code));
 		g_error_free (err);
 		return NULL;
 	}
@@ -329,6 +359,9 @@ run_query (const char *xpath, const char *query)
 	mu_query_destroy (xapian);
 	if (!iter) {
 		g_warning ("Error: %s", err->message);
+		g_signal_emit (G_OBJECT(self),
+			       signals[MUG_ERROR_OCCURED], 0,
+			       mu_result_to_mug_error (err->code));
 		g_error_free (err);
 		return NULL;
 	}
@@ -369,12 +402,13 @@ add_row (GtkListStore *store, MuMsgIter *iter)
 
 
 static int
-update_model (GtkListStore *store, const char *xpath, const char *query)
+update_model (GtkListStore *store, const char *xpath, const char *query,
+	      MugMsgListView *self)
 {
 	MuMsgIter *iter;
 	int count;
 
-	iter = run_query  (xpath, query);
+	iter = run_query  (xpath, query, self);
 	if (!iter) {
 		g_warning ("error: running query failed\n");
 		return -1;
@@ -407,7 +441,8 @@ mug_msg_list_view_query (MugMsgListView *self, const char *query)
 	if (!query)
 		return TRUE;
 	
-	rv = update_model (priv->_store, priv->_xpath, query);
+	rv = update_model (priv->_store, priv->_xpath, query,
+			   self);
 
 	gtk_tree_view_columns_autosize (GTK_TREE_VIEW(self));
 	

toys/mug/mug-msg-list-view.h

@@ -21,7 +21,7 @@
 #define __MUG_MSG_LIST_VIEW_H__
 
 #include <gtk/gtk.h>
-/* other include files */
+#include "src/mu-result.h"
 
 G_BEGIN_DECLS
 
@@ -41,10 +41,20 @@ struct _MugMsgListView {
 	/* insert public members, if any */
 };
 
+enum _MugError {
+	MUG_ERROR_XAPIAN_NOT_UPTODATE,
+	MUG_ERROR_XAPIAN_DIR,
+	MUG_ERROR_QUERY,
+	MUG_ERROR_OTHER
+};
+typedef enum _MugError MugError;
+
+
 struct _MugMsgListViewClass {
 	GtkTreeViewClass parent_class;
 	/* insert signal callback declarations, e.g. */
 	void (* msg_selected) (MugMsgListView* obj, const char* msgpath);
+	void (* error_occured) (MugMsgListView* obj, MugError err);
 };
 
 /* member functions */

toys/mug/mug.cc

@@ -74,18 +74,20 @@ static void
 on_tool_button_clicked (GtkToolButton *btn, MugData *mugdata)
 {
 	ToolAction action;
-	action = (ToolAction)GPOINTER_TO_UINT(g_object_get_data(G_OBJECT(btn),
-								"action"));
+	action = (ToolAction)GPOINTER_TO_UINT(
+		g_object_get_data(G_OBJECT(btn),"action"));
 	switch (action) {
 		 
 	case ACTION_DO_QUIT:
 		gtk_main_quit();
 		break;
 	case ACTION_NEXT_MSG:
-		mug_msg_list_view_move_next (MUG_MSG_LIST_VIEW(mugdata->mlist));
+		mug_msg_list_view_move_next
+			(MUG_MSG_LIST_VIEW(mugdata->mlist));
 		break;
 	case ACTION_PREV_MSG:
-		mug_msg_list_view_move_prev (MUG_MSG_LIST_VIEW(mugdata->mlist));
+		mug_msg_list_view_move_prev
+			(MUG_MSG_LIST_VIEW(mugdata->mlist));
 		break;
 	case ACTION_ABOUT:
 		about_mug (mugdata);
@@ -199,6 +201,41 @@ on_msg_selected (MugMsgListView *mlist, const char* mpath, MugData *mugdata)
 }
 
 
+static void
+on_list_view_error (MugMsgListView *mlist, MugError err,
+		    MugData *mugdata)
+{
+	GtkWidget *errdialog;
+	const char* msg;
+
+	switch (err) {
+	case MUG_ERROR_XAPIAN_NOT_UPTODATE:
+		msg =  "The Xapian Database has the wrong version\n"
+			"Please run 'mu index --rebuild'"; break;
+	case MUG_ERROR_XAPIAN_DIR:
+		msg =  "Cannot find the Xapian database dir\n"
+			"Please restart mug with --muhome=... pointing\n"
+			"to your mu home directory";	break;
+	case MUG_ERROR_QUERY:
+		msg =   "Error in query"; break;
+	default:
+		msg =   "Some error occured"; break;
+	}
+	
+	errdialog = gtk_message_dialog_new
+		(GTK_WINDOW(mugdata->win), GTK_DIALOG_MODAL,
+		 GTK_MESSAGE_ERROR,GTK_BUTTONS_OK, "%s", msg);
+
+	gtk_dialog_run (GTK_DIALOG(errdialog));
+	gtk_widget_destroy (errdialog);
+
+	if (err == MUG_ERROR_QUERY) {
+		mug_query_bar_grab_focus
+			(MUG_QUERY_BAR(mugdata->querybar));	
+	}
+}
+
+
 
 static GtkWidget*
 mug_querybar (void)
@@ -235,6 +272,8 @@ mug_query_area (MugData *mugdata)
 	mug_msg_view_set_msg (MUG_MSG_VIEW(mugdata->msgview), NULL);
 	g_signal_connect (G_OBJECT(mugdata->mlist), "msg-selected",
 			  G_CALLBACK(on_msg_selected), mugdata);
+	g_signal_connect (G_OBJECT(mugdata->mlist), "error-occured",
+			  G_CALLBACK(on_list_view_error), mugdata);
 	gtk_paned_add2 (GTK_PANED (paned), mugdata->msgview);
 
 	mugdata->querybar = mug_querybar();