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Questions tagged [tcollection]

TCollection is a container for TCollectionItem objects. It is defined in the Classes.pas unit.

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delphi TCollection count not increasing after Add

i have the types TNotifyReply = class(TCollectionItem) TNotifyReplylist = class(TOwnedCollection) NotifyReplylist := TNotifyReplylist.Create(self, TNotifyReply); After calling this function (Any number of times), Count it still zero function…
Christopher Chase
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TCollection PropertyEditor with editable Columns

for my own TCollection descendant I want to extend the collection property editor. I want to see more columns for other properties of my TCollectionItem. And I am a lucky because it is pretty easy. The only thing I want to do was to override these…
Heinz Z.
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Date/Time Picker as Property Editor in a TCollectionItem descendant

I'm writing a component which requires properties of type Date, Time, and Date/Time. I would like these properties to be visible in the Object Inspector, with an option to use a popup property editor. I have tried TDate as a published property, and…
Jerry Dodge
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TColumn.FieldName property editor

I'm analyzing the DBGrids.pas unit. There's a TColumn class which have published the FieldName property property FieldName: String read FFieldName write SetFieldName; It's declared as a string but in the object inspector it's appear as a editable…
JustMe
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how to change ItemClass of a class inherited from TCollection

I have a class which inherited from TCollection (lets call it "TMyCollection") and I have to inherit a new class from it (lets call it "TMyItems") Usually we pass the ItemClass type in the constructor of the TCollection but in my case the…
user1512094
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No reaction when "..." clicked on a TCollectionItem property that represents another TCollection

I've never been in a situation that needed it, and this is the first time I try to have a TCollection as TCollectionItem of another TCollection. It all compiles fine, but there is no reaction when the three dots behind the TCollectionItem's…
Domus
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Delphi Readonly TCollection in designtime

I'm trying to create and register a custom editor for TCollection in Delphi XE5. I tried several things, including inheriting the TCollectionProperty class. I figured it's enough to override the GetColOptions function as follows: function…
AnselmoMS
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delphi 7: How can I find item of object collection?

how can I find by name and get the Item in a collection of object ? procedure TfoMain.InitForm; begin // Liste des produits de la pharmacie 1 FListeDispoProduit := TListeDispoProduit.Create(TProduit); with…
TimeIsNear
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Using TCollection with an already-defined class

(Note: This is somewhat related to my last question). I am new to using TCollection in Delphi, and am still wrapping my head around the various ways to handle one-to-many class/property-item relationships. Exploring TCollection and TCollectionItem,…
Jamo
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