How to assemble and display a dialog box "on the fly"

[cerr]

Hi,

I wonder how I can assemble and display a dialog with a QListWidget with items that can be checked with a checkbox (as in options to configure)
So far I've tried this:

int scaper::dialogShow(QWidget *parent) {
ScaperDialog dialog(parent);
dialog.show();

where the ScaperDialog class looks like:

ScaperDialog::ScaperDialog(QWidget *parent) :QDialog(parent) {
list = new QListWidget(parent);
item = new QListWidgetItem();
list->setItemWidget(item,new QCheckBox("checkBox"));
list->addItem(item);
}
void ScaperDialog::CheckAll(void){}
void ScaperDialog::UncheckAll(void){}

but nothing actiually shows up on invocation of dialogShow() what am I missing?
Thanks!

[jsulm]

@cerr said in How to assemble and display a dialog with a QListWidget with items that can be checked with a checkbox (as in options to configure):

but nothing actiually shows up on invocation of dialogShow() what am I missing?

You're missing: show() is non blocking call and dialog is a local variable inside dialogShow, so as soon as dialogShow finishes dialog is destroyed. Use exec() instead of show().

[cerr]

You're missing: show() is non blocking call and dialog is a local variable inside dialogShow, so as soon as dialogShow finishes dialog is destroyed. Use exec() instead of show().

Okay,

Yes, now the Dialog is showing when I use dialog.exec(); in scaper::dialogShow() but it's tiny, i.e. no room to display anything and when I use the mouse to enlarge it, there's no sign of any QListWidget, so I set some parameters to resize it:

ScaperDialog::ScaperDialog(QWidget *parent) :QDialog(parent) {
    int nWidth = 300;
    int nHeight = 300;
    resize(nWidth, nHeight);

but still no sign of a QListWidget, so I gave it a size too, just like:

    int WidX = 100;
    int WidY = 100;

    list = new QListWidget(parent);
    list->setBaseSize(WidX,WidY);

I still see nothing inside the Dialog....what else am I missing?
Thanks!

[mrjj]

@cerr said in How to assemble and display a dialog box "on the fly":

list = new QListWidget(parent);

Try with
list = new QListWidget(this);

[SGaist]

Hi,

You should put your dialog widgets in a layout. That will enable automatic sizing and positioning.

[cerr]

@mrjj said in How to assemble and display a dialog box "on the fly":

Try with
list = new QListWidget(this);

Exactly, that's what I had wrong! I see it now...! :)

[cerr]

@SGaist said in How to assemble and display a dialog box "on the fly":

Hi,

You should put your dialog widgets in a layout. That will enable automatic sizing and positioning.

Yup, that's what I'm working on next! :)