Manual set height of button
lazarus / 43-Android

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las · 2019-09-17 20:46

Hi!

I put two buttons on the form jButton1, jButton2.

The text in jButton1 takes 2 lines
The text in jButton2 takes 1 lines

Coded:

jButton1.LayoutParamHeight := lpWrapContent;
jButton2.LayoutParamHeight := lpExact;
jButton2.height:=jButton1.height;
JButton2.UpdateLayout;

But height of jButton2 not equal height of jButton1 on screen.
Why? What wrong?

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zorfox · 2019-09-17 21:52

This works but may cause issues across devices... 

jButton1.LayoutParamHeight:=lpExact;
  jButton1.Height := 300;

  jButton2.LayoutParamHeight:=lpExact;
  jButton2.Height := 300;

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las · 2019-09-17 22:01

The problem is in different devices. It is necessary that the size of
the large button is determined automatically.

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zorfox · 2019-09-18 16:56

There is no [left , top, width, height] exposed at run time. As far as
I know, height properties will need to be derived from the parent.
Unfortunately, jButton2.Parent := jButton1 won't work. You'll need to
use some sort of container such as a jPanel.

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  
jButton1.Parent := jPanel1;   jButton1.LayoutParamHeight :=
lpMatchParent;  jButton1.PosRelativeToParent := [rpTop,rpLeft]; 
jButton1.Text := 'This is' + #10 + 'two lines';   jButton1.Parent :=
jPanel1;  jButton2.Anchor := jButton1;  jButton2.PosRelativeToAnchor
:= [raToRightOf,raAlignTop]; 
jButton2.LayoutParamHeight:=lpMatchParent;  jButton2.Text := 'This is
one'; 
Here is a good explanation about auto-sizing and layout on the lazarus
Wiki page. Maybe you can come up with a better solution after
digesting that.
https://wiki.freepascal.org/Autosize_/_Layout

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las · 2019-09-18 20:23

In your example, the height of the buttons is generally not clear
what, because the height of the jPanel is not tied to the height of
jButton1, which is automatically calculated.