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(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.

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This commit is contained in:
dominik
2004-12-19 09:39:19 +00:00
parent 10350dda5c
commit ed99219348
3 changed files with 34 additions and 6 deletions
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12
news.h
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@@ -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,