From bb5dca016ddbd7d21373c052cefa96f894e1e2fc Mon Sep 17 00:00:00 2001 From: dominik Date: Sun, 19 Dec 2004 09:39:19 +0000 Subject: (svn r1167) Feature: Added the possibility to add validation functions to NewsItems. This is now done for "Train in depot" messages. Before displaying such a message, it checks if the train really still is in the depot. Can be applied to other news items as well. --- news.h | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'news.h') diff --git a/news.h b/news.h index 076f1b569..858d3923a 100644 --- a/news.h +++ b/news.h @@ -14,20 +14,26 @@ struct NewsItem { TileIndex data_b; uint32 params[10]; + + /* The validation functions for news items get called immediately + * before the news are supposed to be shown. If this funcion returns + * false, the news item won't be displayed. */ + bool (*isValid) ( uint data_a, uint data_b ); }; +typedef bool ValidationProc ( uint data_a, uint data_b ); +typedef void DrawNewsCallbackProc(Window *w); +typedef StringID GetNewsStringCallbackProc(NewsItem *ni); #define NEWS_FLAGS(mode,flag,type,cb) ((cb)<<24 | (type)<<16 | (flag)<<8 | (mode)) void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b); +void AddValidatedNewsItem(StringID string, uint32 flags, uint data_a, uint data_b, ValidationProc *validation); void NewsLoop(void); void DrawNewsBorder(const Window *w); void InitNewsItemStructs(void); VARDEF NewsItem _statusbar_news_item; -typedef void DrawNewsCallbackProc(Window *w); -typedef StringID GetNewsStringCallbackProc(NewsItem *ni); - enum { NT_ARRIVAL_PLAYER = 0, NT_ARRIVAL_OTHER = 1, -- cgit v1.2.3-54-g00ecf