TTICheckListBox: what changed
Revision 0 to 1. Removed lines have a minus sign; added lines have a plus sign.
Title: TTICheckListBox
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| 1 | + | For editing set of enumerated types. Let's assume that we have following definitions. | |
| 2 | + | ||
| 3 | + | ``` Pascal | |
| 4 | + | type | |
| 5 | + | TMonth = (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec); | |
| 6 | + | TMonths = set of TMonth; | |
| 7 | + | // | |
| 8 | + | TForm1 = class(TForm) | |
| 9 | + | private | |
| 10 | + | FMonths: TMonths; | |
| 11 | + | published | |
| 12 | + | property Months: TMonths read FMonths write FMonths; | |
| 13 | + | end; | |
| 14 | + | ``` | |
| 15 | + | ||
| 16 | + | Properties of TTICheckListBox.Link can be assigned as following way. | |
| 17 | + | ||
| 18 | + | ``` Pascal | |
| 19 | + | with TICheckListBox1.LInk do begin | |
| 20 | + | TIObject:= Form1; | |
| 21 | + | TIPropertyName := 'Months'; | |
| 22 | + | end; | |
| 23 | + | ``` | |
| 24 | + | ||
| 25 | + | Assigning TTICheckListBox.Link.AliasValues will change displayed string of items. So, if defined in following way, | |
| 26 | + | ||
| 27 | + | ``` Pascal | |
| 28 | + | with TICheckListBox1.LInk do begin | |
| 29 | + | with AliasValues do begin | |
| 30 | + | Clear; | |
| 31 | + | Add('Jan=January'); | |
| 32 | + | Add('Feb=February'); | |
| 33 | + | Add('Mar=March'); | |
| 34 | + | Add('Apr=April'); | |
| 35 | + | Add('Nov=November'); | |
| 36 | + | Add('Dec=December'); | |
| 37 | + | end; | |
| 38 | + | TIObject:= Form1; | |
| 39 | + | TIPropertyName := 'Months'; | |
| 40 | + | end; | |
| 41 | + | ``` | |
| 42 | + | ||
| 43 | + | The checklist items will be displayed in following way and order: | |
| 44 | + | ||
| 45 | + | ` January`\ | |
| 46 | + | ` February`\ | |
| 47 | + | ` March`\ | |
| 48 | + | ` April`\ | |
| 49 | + | ` November`\ | |
| 50 | + | ` December `\ | |
| 51 | + | ` May`\ | |
| 52 | + | ` Jun`\ | |
| 53 | + | ` Jul`\ | |
| 54 | + | ` Aug`\ | |
| 55 | + | ` Sep`\ | |
| 56 | + | ` Oct`\ | |
| 57 | + | ` ` | |
| 58 | + | ||
| 59 | + | The "checked" months will be correctly stored in the FMonths field of Form1. That is, if you ckeck November, then | |
| 60 | + | ||
| 61 | + | ``` Pascal | |
| 62 | + | Nov in FMonths | |
| 63 | + | ``` | |
| 64 | + | ||
| 65 | + | will return true. | |
| 66 | + | ||
| 67 | + | --- | |
| 68 | + | *From the Free Pascal wiki, page "TTICheckListBox", as it stood on 2022-04-02 after a change by Alextpp, out of the wiki's dump of 2024-05-26. Copyright stays with the author who wrote it, according to the old wiki's [[Licensing]] page. If you have concerns about this material, [message the admin](/wiki-contact).* |