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TCheckBox transparent?
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Topic: TCheckBox transparent? (Read 2854 times)
Aidex
Jr. Member
Posts: 82
TCheckBox transparent?
«
on:
November 12, 2019, 07:34:02 am »
Moin!
Is it possible to make the text background of a CheckBox transparent?
I tried it with .Color:=clNone, but then the text background becomes white.
I need a CheckBox with a transparent background because my self-drawn window contains a color gradient.
I'm using Lazarus 2.0.6 on Windows.
«
Last Edit: November 12, 2019, 08:18:21 am by Aidex
»
Logged
Aidex
Jr. Member
Posts: 82
Re: TCheckBox transparent?
«
Reply #1 on:
November 12, 2019, 07:52:30 am »
On a Delphi website I just found the suggestion to label the CheckBox with a TLabel instead.
This seems to be the easiest and quickest solution.
But I would be interested to know why it is not possible to make a CheckBox transparent.
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jamie
Hero Member
Posts: 6130
Re: TCheckBox transparent?
«
Reply #2 on:
November 13, 2019, 02:39:54 am »
If you have a self drawn surface then you can also self draw the check box..
If you want to play some UF8 stuff, there is a ready made font character that has a Check mark that
you can print.
Or you could do what many do and that is to have an ICON image of the checked and unchecked state.
Logged
The only true wisdom is knowing you know nothing
lainz
Hero Member
Posts: 4470
Re: TCheckBox transparent?
«
Reply #3 on:
November 13, 2019, 02:55:22 am »
Bgracontrols has a custom checkbox control with transparency.
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https://lainz.github.io/
wp
Hero Member
Posts: 11923
Re: TCheckBox transparent?
«
Reply #4 on:
November 13, 2019, 10:53:20 am »
Strangely enough, the Checkbox DOES have transparent background when placed directly on a form. On a panel, however, the text is opaque. And I looked at Delphi 7 and XE 10.3: Here the Checkbox caption is transparent both on form and panel in both versions. (All tests done on Win 10).
So, this looks like a bug to me. You should file a bug report.
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winni
Hero Member
Posts: 3197
Re: TCheckBox transparent?
«
Reply #5 on:
November 13, 2019, 11:00:33 am »
Checkbox on a panel is transparent on gtk2 /Laz 2.06
Winni
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lainz
Hero Member
Posts: 4470
Re: TCheckBox transparent?
«
Reply #6 on:
November 13, 2019, 01:53:04 pm »
Indeed, it's transparent, tested on Windows 10, also with a vertical gradient as background.
Edit: And BGRAControls one is not transparent, checked that too, seems that we inherited from TCustomControl to handle focus...
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https://lainz.github.io/
fmc
New Member
Posts: 37
Re: TCheckBox transparent?
«
Reply #7 on:
November 13, 2019, 03:35:34 pm »
Nice stuff. Fully transparent on a Panel.
Logged
Win X Pro / Lazarus 2.0.6 / FPC 3.0.4
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