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Topic: Detecting Click on a Form. (Read 1738 times)
DenPit5
New Member
Posts: 21
Detecting Click on a Form.
«
on:
December 07, 2018, 01:13:51 pm »
I need to be able to click on a Form and get the x & y coordinates of a click. I realise they must be somehow available in the ONClick event but don't know how they are presented there. Can Anyone Help. ?? Please !!
Logged
BSaidus
Hero Member
Posts: 545
lazarus 1.8.4 Win8.1 / cross FreeBSD
Re: Detecting Click on a Form.
«
Reply #1 on:
December 07, 2018, 01:21:11 pm »
Use the OnMouseDowne event that contain X and Y coordinate.
Code: Pascal
[Select]
[+]
[-]
procedure
TForm1
.
FormMouseDown
(
Sender
:
TObject
;
Button
:
TMouseButton
;
Shift
:
TShiftState
;
X
,
Y
:
Integer
)
;
begin
end
;
Logged
lazarus 1.8.4 Win8.1 / cross FreeBSD
dhukmucmur vernadh!
sash
Sr. Member
Posts: 366
Re: Detecting Click on a Form.
«
Reply #2 on:
December 07, 2018, 02:40:45 pm »
Also available as @Mouse.CursorPos@ anywhere in Application.
Code: Pascal
[Select]
[+]
[-]
procedure
TForm1
.
FormClick
(
Sender
:
TObject
)
;
var
mp
:
TPoint
;
begin
mp
:
=
Mouse
.
CursorPos
;
//in screen coordinates
mp
:
=
{AnyControl.}
ScreenToClient
(
Mouse
.
CursorPos
)
;
//in form (or any other control coordinates)
ShowMessageFmt
(
'click: [%d:%d]'
,
[
mp
.
x
,
mp
.
y
]
)
;
end
;
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Lazarus 2.0.10 FPC 3.2.0 x86_64-linux-gtk2 @
Ubuntu
20.04
XFCE
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