TImage.BringToFront does not work as expected
lazarus / 31-LCL

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FrankBKK · 2021-06-26 12:50

I have a simple Form with a TImage on the top and a TPageControl on
the bottom of the window.

OnImageDoubleClick  the Picture will be enlarged to the size of the
form and  shown over the the PageControl.

The resizing part works fine, but an  Image.BringToFront  does not
work - the Image is still behind the PageControl.

PageControl.SendToBack  has no effect either.

How can I fix this ?

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winni · 2021-06-26 14:33

Hi!

I don't know where the  problem with bringToFront is.
But as a workaround you can use

Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
PageControl.visible := false;
and later switch it on again.

Winni

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alpine · 2021-06-26 19:21

TImage is not a real "widget", it is a descendant of TGraphicControl.
Put the image on a TPanel and bring him to front.

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wp · 2021-06-26 19:32

Quote from: FrankBKK on June 26, 2021, 02:50:08 pmI have a simple Form
with a TImage on the top and a TPageControl on the bottom of the
window.

OnImageDoubleClick  the Picture will be enlarged to the size of the
form and  shown over the the PageControl.
Don't do this. Even if the Image would cover the PageControl, the
controls on the Pagecontrol are still active and can receive user
keyboard input. Much better to follow winni's approach to hide the
PageControl when you don't want to see it.