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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 cf89cb12cd
commit bb5dca016d
3 changed files with 34 additions and 6 deletions
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12
news.h
View File

@ -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,

13
news_gui.c
View File

@ -210,7 +210,6 @@ byte increaseIndex(byte i)
return i;
}
void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
{
NewsItem *ni;
@ -257,6 +256,14 @@ void AddNewsItem(StringID string, uint32 flags, uint data_a, uint data_b)
w->vscroll.count = _total_news;
}
/* To add a news item with an attached validation function. This validation function
* makes sure that the news item is not outdated when the newspaper pops up. */
void AddValidatedNewsItem(StringID string, uint32 flags, uint data_a, uint data_b, ValidationProc validation)
{
AddNewsItem(string, flags, data_a, data_b);
_news_items[_latest_news].isValid = validation;
}
// don't show item if it's older than x days
static const byte _news_items_age[] = {60, 60, 90, 60, 90, 30, 150, 30, 90, 180};
@ -421,6 +428,10 @@ static void MoveToNexItem(void)
if (_date - _news_items_age[ni->type] > ni->date)
return;
// execute the validation function to see if this item is still valid
if ( ni->isValid != NULL && !ni->isValid(ni->data_a, ni->data_b) )
return;
// show newspaper or send to ticker?
if (!HASBIT(_news_display_opt, ni->type) && !(ni->flags & NF_FORCE_BIG))
ShowTicker(ni);

15
train_cmd.c
View File

@ -2546,6 +2546,16 @@ void Train_Tick(Vehicle *v)
static const byte _depot_track_ind[4] = {0,1,0,1};
// Validation for the news item "Train is waiting in depot"
bool ValidateTrainInDepot( uint data_a, uint data_b )
{
Vehicle *v = &_vehicles[data_a];
if (v->u.rail.track == 0x80 && (v->vehstatus | VS_STOPPED))
return true;
else
return false;
}
void TrainEnterDepot(Vehicle *v, uint tile)
{
SetSignalsOnBothDir(tile, _depot_track_ind[_map5[tile]&3]);
@ -2580,11 +2590,12 @@ void TrainEnterDepot(Vehicle *v, uint tile)
v->vehstatus |= VS_STOPPED;
if (v->owner == _local_player) {
SetDParam(0, v->unitnumber);
AddNewsItem(
AddValidatedNewsItem(
STR_8814_TRAIN_IS_WAITING_IN_DEPOT,
NEWS_FLAGS(NM_SMALL, NF_VIEWPORT|NF_VEHICLE, NT_ADVICE, 0),
v->index,
0);
0,
ValidateTrainInDepot);
}
}
}