Axel Bernard wrote:
By the way, I confirm that it is an actual bug in the Lib:
- modifying the Sample appli Formats (FormatsPanel.c) as
/* ------------------ PanelPickListDrawItem func --------- */ static char marre[128]; //+
static void PanelPickListDrawItem (UInt itemNum, RectanglePtr bounds,
CharPtr *unusedP)
{
CharPtr itemText;
StrPrintF (marre, "Item %d", itemNum);
//--removed--itemText = panelIDsP[itemNum].name; //-
WinDrawChars(marre, StrLen(marre), bounds->topLeft.x,
bounds->topLeft.y); //changed
// the draw func is changed in the way that neither // the resources nor the number of item matter. // it displays now the item number... }
/* ------------------ CreatePanelPickList func ------------ */
CreatePanelPickList (...) { ... LstSetHeight (listP, 12 /*was 'panelCount' */); LstSetTopItem (listP, 2967); ...
// We get the exact same problem! List is blank. // If Height is set to something else than 12, let say // 8 as it was at the beginning, it works fine (maybe // another magic Top item number would fail as well). }
So, with Top item being 2967, and Height of list being 12, the items are simply not displayed - or rather erased!
Ok, I will use a table - but it's funny: the List works fine, it does not crash, neither it fails ; items can be selected, but for those particular numbers (2967, 12), the list won't display at Init !
Thanks Ben.
Ben Combee wrote:
At 08:39 PM 10/28/2003, Axel Bernard wrote:
Hi all,
i'm back on the subject as i'm stuck right now.
Our program
- display a list of 2979 items (strings), 12 visible items - using our own Draw function through LstSetDrawFunction
- when LstSetTopItem () is set to 2967 (ie top of last page) the list is displayed a microsecond then is erased - i.e. the 12 lines become blank. Even the top and down arrows in the list disappeared.
OK... if you've got more than 100 items, a list is an inappropriate control to show your data. It doesn't support browsing and finding items quickly. You'd do much, much better using a table, possibly with a scroll bar, and some sort of index mechanism. The "little arrow" UI is just too difficult to handle and navigate for that many items, IMO.
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