Center a widget in a cell on a QTableWidget

[jpn]

Layouts have margin by default so try:

layout->setMargin(0);

layout->setMargin(0);

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[THRESHE]

Layouts have margin by default so try:

layout->setMargin(0);

layout->setMargin(0);

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Did the trick thanks a lot jpn

[THRESHE]

Damn Layouts are still not so clear to me
I try to use them like this

pixmap_.load(":/images/StatusIcons/ico_complete.png");
iconLabel_.setPixmap(pixmap_);
layout_.addSpacing(50);
layout_.addWidget(&iconLabel_);
layout_.addSpacing(5);
layout_.addWidget(&textLabel_);
layout_.addSpacing(50);
layout_.setMargin(0);

pixmap_.load(":/images/StatusIcons/ico_complete.png");
iconLabel_.setPixmap(pixmap_);
layout_.addSpacing(50);
layout_.addWidget(&iconLabel_);
layout_.addSpacing(5);
layout_.addWidget(&textLabel_);
layout_.addSpacing(50);
layout_.setMargin(0);

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But I get something like this...

[jpn]

Sorry, from that snippet it's hard to understand which is which. Anyway, it's a very bad idea to allocate widgets on the stack like that. Here are a couple of threads explaining why:

• http://www.qtcentre.org/forum/f-qt-p...ent-10561.html
• http://www.qtcentre.org/forum/f-qt-p...ssue-8715.html

[Boy]

This can be done a lot easier IMO:

//the tablewidget
QTableWidget* tableWidget = new QTableWidget(w);
 
//some rows and columns
tableWidget->setRowCount(3);
tableWidget->setColumnCount(3);
 
//first create a new widget
QWidget* wdg = new QWidget;
 
//lets say we want a checkbox in the cell
QCheckBox *box = new QCheckBox();
 
// create the layout ON THE HEAP! (else after the function ends, layout is gone)
QHBoxLayout* layout = new QHBoxLayout(wdg);
 
// add the checkbox to the widget
layout->addWidget(box);
 
// center align the layout (box ends up in the center horizontally and vertically)
layout->setAlignment( Qt::AlignCenter );
 
// set the layout on the widget, it takes ownership of the layout (don't need to delete it later)
wdg->setLayout(layout);
 
// set the widget in the cell
tableWidget->setCellWidget(2, 0, wdg);

//the tablewidget
QTableWidget* tableWidget = new QTableWidget(w);

//some rows and columns
tableWidget->setRowCount(3);
tableWidget->setColumnCount(3);

//first create a new widget
QWidget* wdg = new QWidget;

//lets say we want a checkbox in the cell
QCheckBox *box = new QCheckBox();

// create the layout ON THE HEAP! (else after the function ends, layout is gone)
QHBoxLayout* layout = new QHBoxLayout(wdg);

// add the checkbox to the widget
layout->addWidget(box);

// center align the layout (box ends up in the center horizontally and vertically)
layout->setAlignment( Qt::AlignCenter );

// set the layout on the widget, it takes ownership of the layout (don't need to delete it later)
wdg->setLayout(layout);

// set the widget in the cell
tableWidget->setCellWidget(2, 0, wdg);

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[drescherjm]

Thanks. The last example worked for me however the checkbox appears slightly off center in the cell. Any ideas what causes that?

This is in Qt 4.3 on windows XP.

[Boy]

Thanks. The last example worked for me however the checkbox appears slightly off center in the cell. Any ideas what causes that?

This is in Qt 4.3 on windows XP.

Hi,

I'm just guessing here, but maybe you could try layout->setSpacing( 0 ) and check if this changes anything

[drescherjm]

Thanks, I will try that.

My first guess for the reason was that there was some space auto allocated for the label that can appear next to the checkbox.

If you have not guessed I am a former MFC programmer...