Error message windows

git-svn-id: svn://cook.msm.cam.ac.uk:745/diff-tomo/dtr@145 bf6ca9ba-c028-0410-8290-897cf20841d1

3 files changed, 15 insertions, 0 deletions

diff --git a/src/displaywindow.c b/src/displaywindow.c
index cfaea27..2dddbae 100644
--- a/src/displaywindow.c
+++ b/src/displaywindow.c
@@ -977,3 +977,15 @@ void displaywindow_update_dirax(ControlContext *ctx, DisplayWindow *dw) {
 
 }
 
+void displaywindow_error(const char *msg, DisplayWindow *dw) {
+
+	GtkWidget *window;
+	
+	window = gtk_message_dialog_new(GTK_WINDOW(dw->window), GTK_DIALOG_DESTROY_WITH_PARENT,
+				GTK_MESSAGE_WARNING, GTK_BUTTONS_CLOSE, msg);
+	gtk_window_set_title(GTK_WINDOW(window), "Error");
+	g_signal_connect_swapped(window, "response", G_CALLBACK(gtk_widget_destroy), window);
+	gtk_widget_show(window);
+	
+}
+
diff --git a/src/displaywindow.h b/src/displaywindow.h
index e8ddbf2..423fe59 100644
--- a/src/displaywindow.h
+++ b/src/displaywindow.h
@@ -64,6 +64,7 @@ extern DisplayWindow *displaywindow_open(ControlContext *ctx);
 
 extern void displaywindow_update(DisplayWindow *dw);
 extern void displaywindow_update_dirax(ControlContext *ctx, DisplayWindow *dw);
+extern void displaywindow_error(const char *msg, DisplayWindow *dw);
 
 #endif	/* DISPLAYWINDOW_H */
 
diff --git a/src/reproject.c b/src/reproject.c
index 60ff104..15a3ca9 100644
--- a/src/reproject.c
+++ b/src/reproject.c
@@ -220,11 +220,13 @@ void reproject_open(ControlContext *ctx) {
 	
 	if ( !ctx->cell ) {
 		printf("RP: No current cell\n");
+		displaywindow_error("No reciprocal unit cell has been specified.", ctx->dw);
 		return;
 	}
 	
 	if ( !ctx->images ) {
 		printf("RP: No images!\n");
+		displaywindow_error("No images to reproject!", ctx->dw);
 		return;
 	}