TDBPlannerMonthview display problem when using ShowScrollColumn

[Andra_Carsten (Andrä Carsten)]

Haupt.dfm (12.2 KB)
Haupt.pas (2.5 KB)

Hello,
I have encountered a weird display problem while using the TDBPlannerMonthView.
It is a bit difficult to describe and reproduce, which is why I have attached a unit that will showcase the problem:

It seems that with certain combinations of multi-day- and single-day-items the display is wrongly calculated and shown in such a fashion that you have to scroll down to find the items, although there is nothing but empty space above them, which makes the planner look empty, although it isn't.

It is very obvious in the provided units: When compiled as they are the third row (13. - 19.) will be displayed empty, but when you scroll down in that row, you will find the items.
When certain parts in the source code are removed (see comments) those items will be correctly displayed and are immediately visible without having to scroll.

[brunofierens]

When there are X overlapping items, the position of each of the overlapping items is calculated and is between 0 and X-1. The calculated overlap position is fixed and calculated once. The nr. of overlap is determined by the day that has most overlapping items. This is to ensure that for the multiday events, the vertical position of the same item is for every day the same.
The effect we see here is that on Oct 6, there are so many overlapping items that the position index of the multiday overlapping items is higher than the nr. of items you allow to be displayed. So, the scroll indicator is for these other day cells the only visual indicator there are more items. If you scroll up sufficiently, you see the multiday overlapping items appear.