php-qt-users

[Php-qt-users] QGridLayout

[Ferenc V. <li...@ne...>]

Oh, seems the berlios list is still up and running! I forward to sf,
just in case! :-) Sorry for sending twice to some readers!

-------- Original Message --------
Subject: [Php-qt-users] QGridLayout
Date: Tue, 17 Jan 2006 01:45:31 +0100
From: Ferenc Veres <li...@ne...>
To: php...@li...

Hi,

And last a little QGridLayout question.

Why tutoruial 6 stops working if I change the grid's internal control to
QLineEdit like this:

$this->grid->addWidget(new QLineEdit("na", $this), $row, $column, 0);

If "$this" is the problem, what do you advice to solve it?

(I have similar problem with my program what I try to convert to use
QGridLayout, but that actually displays all controls in the top left
corner, no segfault.)

Thanks,
Ferenc
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Re: [Php-qt-users] QGridLayout

[Ferenc V. <li...@ne...>]

Hi All,

I still don't get it. I tried to change tutorial 6 to add a different
widgets to the grid, please see the following modifications of
"LCDRange" original example class:


/* LCD and slider */

	class Test1 extends QWidget
	{
		public $lcd;
		public $slider;
		public $layout;
		
		function __construct()
    	{
    		parent::__construct();
			$this->lcd = new QLCDNumber(2,$this);
			$this->slider = new QSlider($this);

			$this->layout = new QVBoxLayout($this);
			$this->layout->addWidget($this->lcd);
			$this->layout->addWidget($this->slider);
			$this->setLayout($this->layout);
		}
	}


/* LCD only */
	
	class Test2 extends QWidget
	{
		public $lcd;
		public $layout;
		
		function __construct()
    	{
    		parent::__construct();
			$this->lcd = new QLCDNumber(2,$this);

			$this->layout = new QVBoxLayout($this);
			$this->layout->addWidget($this->lcd);
			$this->setLayout($this->layout);
		}
	}


/* Slider only */
	
	class Test3 extends QWidget
	{
		public $slider;
		public $layout;
		
		function __construct()
    	{
    		parent::__construct();
			$this->slider = new QSlider($this);

			$this->layout = new QVBoxLayout($this);
			$this->layout->addWidget($this->slider);
			$this->setLayout($this->layout);
		}
	}

Test 1 OK: contains both slider and LCD and can be added to the grid.
Test 2 CORE: contains the LCD only, adding it to the grid drops core.
Test 3 OK: contains the slider only, can be added to the grid.

$this->grid->addWidget(new Test3(), $row, $column, 0);

Anyway, will it be possible to add single widgets, like in the example
below? (Which will have no additional layout, just the widget itself.)

To test QGridLayout I tried to change my little test program to use it,
by adding Button or QLineEdit. Seems it works only with the Tutorial 6
class at the moment. ;-)

Many thanks,
Ferenc

Ferenc Veres wrote:
> Why tutoruial 6 stops working if I change the grid's internal control to
> QLineEdit like this:
> 
> $this->grid->addWidget(new QLineEdit("na", $this), $row, $column, 0);
> 
> If "$this" is the problem, what do you advice to solve it?
> 
> (I have similar problem with my program what I try to convert to use
> QGridLayout, but that actually displays all controls in the top left
> corner, no segfault.)
> 
> Thanks,
> Ferenc
> _______________________________________________

Re: [Php-qt-users] QGridLayout

[Thomas M. <tm...@ip...>]

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Re: [Php-qt-users] QGridLayout

[Ferenc V. <li...@ne...>]

Hi all,

Thomas Moenicke wrote:

>
> It runs if I create the Slider but omit it from the layout.
>
> /* LCD only */
>


I checked out the latest version and runs perfect with adding QLineEdit
and QPushButton controls to the grid. Great!  :-)

In my code I have public arrays for all those controls. In tutorial 6, I
think the LCDRange() has no public class member variable assigned. (Same
in C++ original tutorial.) I don't know if this difference causes
changing the line in t6/main.php:

$this->grid->addWidget(new QPushButton("a",$this), $row, $column, 0);
or
$this->grid->addWidget(new QLineEdit("a",$this), $row, $column, 0);

to segfault. (Garbage collector kills the referenced QLineEdit?)

(I have the same controls in my program and they work well. Anyway, I
don't think anyone would create a control without some way to access it
(i.e. a class member object). Then I just wonder why the original T6
works.  :-)  )

Ferenc

Re: [Php-qt-users] QGridLayout

[Thomas M. <tm...@ip...>]

I fixed that problem. QObjects are stored in a way that ensures safety. You 
should be able to add every QObject you want. Without any tricks ;-) 

-- 
Thomas