[SOLVED: Thanks Jacek] setParent on object just makes it disapear.

Hello people,

i'm new to this forum, i don't know how much active it is.
So let me explain what i'm doing first:
- I want to achieve a very simple text editor (Tab based) like GEdit is.
- I want it to be light (Because it is part of a much bigger project i have).

So for this
- In the first tab i have a QTextEdit item.
- i have created a simple QT Window, with in it a tabContainer.
- In this tab container, i have created two test tabs (tabFile_New1 and tabFile_New2).
- The signal fom the tab container: currentChanged(QWidget*) is handled in my main Window code, and it pretty much does something like this:

Code:

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void CWndMainImpl::EditorTabChanged (QWidget* pWidget) {
	QTabWidget* pSelectedTab	= (QTabWidget*)pWidget;
	pTextViewer->setParent(pSelectedTab);
}

---

So as you understood, the goal is to only have one single text edit box which travels from one tab to another, just changing it's content in a transparent way to the end user...

The problem is that when i run the app and then switch from the default tab (Where there is actually the text edit) to the other tab, it doesn't switches. And then when i go back to the original tab, my text edit isn't there anymore...

I have tried very much variants and i don't finally understand what i am doing wrong.

Thanks for your time!
Pierre.

[EDIT:] Sorry for my bad english

Quote:

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Originally Posted by hickscorp

i don't know how much active it is.

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Just take a look around and judge for yourself.

Quote:

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Originally Posted by hickscorp

QTabWidget* pSelectedTab = (QTabWidget*)pWidget;

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Are you sure this cast is correct? QTabWidget doesn't represent a single tab, but the whole tab container.

Maybe you need only QTabBar?

BTW. Which Qt version do you use?

Hello Jacek,

You are right the cast was incorrect (Because it was one of my tests...).
So here is the method which *should* work:

Code:

---

void CWndMainImpl::EditorTabChanged (QWidget* pWidget) {
	pTextViewer->setParent(pWidget);
}

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But it does the same :(
The interesting point is that when i create my text box, i do as follows:

Code:

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pTextViewer	= new QTextEdit;
pTextViewer->setParent(tabFile_New1);
connect( tabCtnrEditor, SIGNAL(currentChanged(QWidget*)), this, SLOT(EditorTabChanged(QWidget*)) );

---

And the parent i give is ok.
But then once the parent is set up, if i try to change the edit box's parent, it doesn't works as i'm expecting.

[EDIT:] The version i'm using is QT 4.2, i don't know the minor version (Standard Edgy package).

Anyway, thanks a lot for your help.
Pierre.

Try this:

Code:

---

void CWndMainImpl::EditorTabChanged (QWidget* pWidget) {
	pTextViewer->setParent(pWidget);
	pTextViewer->show();
}

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But IMO you should use only QTabBar instead of the whole QTabWidget.

Hey, the show() method worked!
I clearly don't understand the "why" but i thanks you a lot for the "how" :)

About using a QTabBar, i don't understand the difference on what i'm doing ?
My problem is that i'm writing code on a derivated class from a ui_* generated by QTDesigner... And i'm not sure if i can place a QTabBar within QTDesigner in the right place, between the right spacers :)

Anyway thanks again, i'll try a lookup at the trolltech docs on how to use QTabBar.

Pierre.

Quote:

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Originally Posted by hickscorp

About using a QTabBar, i don't understand the difference on what i'm doing ?

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In short: QTabWidget == QTabBar + QStackedWidget, but clearly you don't want to use QStackedWidget part, so the only thing left is QTabBar ;)

I see, i'll try to look closer at this option.

Thanks for the answers!
Pierre.