Settings widget into focus programmatically.

Dariusz

I have custom QComboBox with QTreeView that I would like to show when user press on the drop down arrow to show combo options.

I replaced QComboBox::showPopup call with me showing the tree in the correct place location.

I also set these parameters on the tree :

    mView_tree->setFocusPolicy(Qt::StrongFocus);
    mView_tree->setFrameShape(QFrame::NoFrame);
    mView_tree->setWindowFlags(Qt::Tool | Qt::CustomizeWindowHint);

And I showPopup :

... some code
mView_tree->move(loc);
mView_tree->show();
mView_tree->setFocus(Qt::MouseFocusReason);

When the tree shows up, it does not have focus. How can I get it to focus properly?

I also tried this in case some QComboBox signals break stuff - at the bottom of showPopup func.

    QMetaObject::invokeMethod(mView_tree, [=]() { mView_tree->setFocus(); }, Qt::QueuedConnection);

Sadly no luck, any info/help?

TIA

mrjj

Hi
But who has focus then?
Try use
QApplication::focusWidget()
to see what widget steals your focus.

Dariusz

Thats a brilliant thing!

Its the evil combo box ! -.-

What can I do to drop its focus? I'm lost :- (

mrjj

@Dariusz
The first test might be to
combo->setFocusPolicy(Qt::NoFocus);

Dariusz

@mrjj said in Settings widget into focus programmatically.:

combo->setFocusPolicy(Qt::NoFocus);

Nope still in focus :- (

SGaist

Hi,

How are you creating that special QComboBox ?

Dariusz

@SGaist
Hey
Goes pretty much like this now that I look at it :
combo is placed inside QWidget that is being used as a setTitleBarWidget(menuBarWidget);

#include "QComboBox"
#include "QTreeView"

class comboExample :public QComboBox{
    Q_OBJECT
    QTreeView *view;
public:
    comboExample();
    ~comboExample();

    void showPopup();
    void setModel(QAbstractItemModel*model);

};


#include "comboExample.h"
#include "QHeaderView"

comboExample::comboExample() {
    view = new QTreeView();
    view->show();
    view->setStyleSheet("border: 1px solid gray");
    view->header()->setHidden(true);
    view->setFrameShape(QFrame::NoFrame);
    view->setEditTriggers(QTreeView::NoEditTriggers);
    view->setAlternatingRowColors(true);
    view->setSelectionBehavior(QTreeView::SelectRows);
    view->setWordWrap(true);
    view->setAllColumnsShowFocus(true);
    view->setWindowFlags(Qt::Tool | Qt::CustomizeWindowHint);
   setMaximumWidth(100);
   setAttribute(Qt::WA_TranslucentBackground, true);
   setMaximumHeight(22);
}
comboExample::~comboExample() {

}
void comboExample::showPopup() {
    //QComboBox::showPopup();
    view->move(pos());///wrong pos ...
    view->show();
    view->setFocus(Qt::MouseFocusReason);
}
void comboExample::setModel(QAbstractItemModel *model) {
    view->setModel(model);
}

SGaist

This Wiki article shows a starting point to get a tree view inside a QComboBox. It needs some cleanup but should get you started.

Dariusz

That article answers quite a few questions I had about that scenario, woah nice thanks!

But... I kinda like the idea of more "control"... somehow, creating the widget this way allow the user to resize it which won't be possible using a popup, so I would like to get the focus to work properly...

TIA