QVBoxLayout - QLabel on top of a Layout

maximus

Hi,

I have a this widget :
https://www.dropbox.com/s/j9r0bw2zgwqd5wk/layoutNow2.png

I want to fix it so the QLabel (black overlay down) only take a fixed amount of height (20 pixel for example)
Or set the margin of the layout so that it takes everything - 20px...

I have tried all kind of layout, spacer item, and i'm failling again at layout management. What would be the easiest way to achieve that? I want it too look like Google chrome loading animation.

Current code :

@Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) {
ui->setupUi(this);

widgetLoading = new QWidget(this);
QVBoxLayout *vLayout = new QVBoxLayout(widgetLoading);
vLayout->setContentsMargins(10, 500, 100, 0);  /// Not good, 500px is fixed and result is bad depending on resolution

// QSpacerItem *spacer = new QSpacerItem(20, 20, QSizePolicy::Minimum, QSizePolicy::MinimumExpanding);
// vLayout->addSpacing(400);

labelMsg = new QLabel(widgetLoading);
labelMsg->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
labelMsg->setAlignment(Qt::AlignBottom | Qt::AlignLeft);
labelMsg->hide();

// vLayout->addSpacerItem(spacer);
vLayout->addWidget(labelMsg, Qt::AlignBottom);
ui->gridLayout->addWidget(widgetLoading, 1, 0, 1, 1);
...
}@

maximus

Fixed using this:

@Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) {
ui->setupUi(this);

widgetLoading = new QWidget(this);
QVBoxLayout *vLayout = new QVBoxLayout(widgetLoading);

QSpacerItem *spacer = new QSpacerItem(200, 200, QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);

labelMsg = new QLabel(widgetLoading);
labelMsg->setMaximumHeight(30);
labelMsg->setMaximumWidth(400);
labelMsg->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
labelMsg->setAlignment(Qt::AlignBottom | Qt::AlignLeft);
labelMsg->hide();
vLayout->addSpacerItem(spacer);

vLayout->addWidget(labelMsg, Qt::AlignBottom);
ui->gridLayout->addWidget(widgetLoading, 1, 0, 1, 1);@

Probably not the way intented by Qt but if you don't add another dummy widget to take the extra space the widget never go where you want..

maximus

Great I haven't thought of it, the interface is working, but since my Label is on top of my QWebView, I loose all interaction with the QWebView once the label is shown.. Is there a property for a QWidget to be "transparent" I.E let click pass trough it.

Or i'll just make a small ajax loading icon, that's what you get for being too fancy !

SGaist

Hi,

You can set Qt::WA_TransparentForMouseEvents on your label and you should be good to go

maximus

Incredible, Qt has done everything!

100% working now
@ widgetLoading->setAttribute(Qt::WA_TransparentForMouseEvents,true);
loadingMsg->setAttribute(Qt::WA_TransparentForMouseEvents,true);@

Thank you for the 1000 times :)

SGaist

You're welcome :)

Happy coding !