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[SOLVED] Components [again]
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Topic: [SOLVED] Components [again] (Read 711 times)
pcurtis
Hero Member
Posts: 951
[SOLVED] Components [again]
«
on:
October 30, 2020, 07:43:55 pm »
Hi All,
I know I've asked this before but I can't figure out how to change it.
In the attachment is a simple component. I just want to add a seperate OnClick event for each button.
Any help is greatly appreciated.
«
Last Edit: October 30, 2020, 08:30:47 pm by pcurtis
»
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
Handoko
Hero Member
Posts: 5154
My goal: build my own game engine using Lazarus
Re: Components [again]
«
Reply #1 on:
October 30, 2020, 07:58:20 pm »
You should add the properties for
AddClick
,
SaveClick
and
CancelClick
:
Code: Pascal
[Select]
[+]
[-]
TMyButton
=
class
(
TCustomControl
)
private
fbtnADD
:
TBitBtn
;
fbtnSAVE
:
TBitBtn
;
fbtnCANCEL
:
TBitBtn
;
// ...
function
GetAddClick
:
TNotifyEvent
;
procedure
SetAddClick
(
anEvent
:
TNotifyEvent
)
;
function
GetSaveClick
:
TNotifyEvent
;
procedure
SetSaveClick
(
anEvent
:
TNotifyEvent
)
;
function
GetCancelClick
:
TNotifyEvent
;
procedure
SetCancelClick
(
anEvent
:
TNotifyEvent
)
;
//...
published
property
AddClick
:
TNotifyEvent
read
GetAddClick
write
SetAddClick
;
property
SaveClick
:
TNotifyEvent
read
GetSaveClick
write
SetSaveClick
;
property
CancelClick
:
TNotifyEvent
read
GetCancelClick
write
SetCancelClick
;
end
;
And then the code for
setters
and
getters
. The setters and getters are something like this:
Code: Pascal
[Select]
[+]
[-]
function
TMyButton
.
GetAddClick
:
TNotifyEvent
;
begin
Result
:
=
fbtnADD
.
OnClick
;
end
;
procedure
TMyButton
.
SetAddClick
(
anEvent
:
TNotifyEvent
)
;
begin
fbtnADD
.
OnClick
:
=
anEvent
;
end
;
// Add the similar setter and getter for Save and Cancel
// ...
Logged
pcurtis
Hero Member
Posts: 951
Re: Components [again]
«
Reply #2 on:
October 30, 2020, 08:30:02 pm »
Perfect. Thanks.
Is there a good tutorial on this subject?
Logged
Windows 10 20H2
Laz 2.2.0
FPC 3.2.2
howardpc
Hero Member
Posts: 4144
Re: [SOLVED] Components [again]
«
Reply #3 on:
October 30, 2020, 08:58:08 pm »
In addition to the many online resources available (see the wiki and links) the Lazarus Handbook (see advert on the forum sidebar) has a good chapter about writing components, contributed by wp (it is chapter 11, in Volume 2).
Logged
Sieben
Sr. Member
Posts: 310
Re: [SOLVED] Components [again]
«
Reply #4 on:
October 30, 2020, 10:31:27 pm »
And studying code... Here's another approach that might be handy if you add more buttons:
Logged
Lazarus 2.2.0, FPC 3.2.2, .deb install on Ubuntu Xenial 32 / Gtk2 / Unity7
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