c++ - qt dialog2 connect dialog1 to updateQtableWidget -

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i tried many things , read day no real progress. typed question, went through stack overflow suggestions. goal? have dialog2 send out signal dialog1 call function in dialog1, load/update qwidgettable. in dialog2(no buttons), keypressevent(f4), opens file, saves text in lineedit, file. after stream out done, stream flushed, file closed , lineedit fields reset can input more stuff if needed. works perfect, in part forum. but, being dialog2 nothing more size of messagebox, can still see dialog1 behind it, , tablewidget doesn't update stuff saved file. looks weird user. i'm at...

connect(this->ui->lineedit,signal(textchanged(qstring)),dialog1,slot(loadtable()));

(this) dialog2. doesn't compile. know i'm missing here. signals , slots relatively easy if widgets inside own "form"/"window".

any appreciated.

    dialog1::dialog1(qwidget *parent) :     qdialog(parent),     ui(new ui::dialog1) {     setwindowflags(qt::widget | qt::framelesswindowhint);//frameless     ui->setupui(this);     //move dialog away center     this->setgeometry(0,0,this->width(),this->height());     //put dialog in screen center     const qrect screen = qapplication::desktop()->screengeometry();     this->move( screen.center() - this->rect().center() );     loadtable();  }    dialog2::dialog2(qwidget *parent) :     qdialog(parent),     ui(new ui::dialog2) {     setwindowflags(qt::widget | qt::framelesswindowhint);//frameless     ui->setupui(this);     //move dialog away center     this->setgeometry(0,0,this->width(),this->height());     //put dialog in screen center     const qrect screen = qapplication::desktop()->screengeometry();     this->move( screen.center() - this->rect().center() );     connect(ui->lineedit,signal(textchanged(qstring)),&dialog1,slot(loadtable())); }

i don't it.

i believe problem here : 

connect(ui->lineedit,signal(textchanged(qstring)),&dialog1,slot(loadtable()));

you don't have dialog1 instance. if dialog1 appear first, need pass dialog1 instance dialog2, , able connect it.


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