HBoxlayout items starting on the left?

jkwok678

I've been trying to use the HBoxlayout and I'm trying to get all the QToolButtons to start and clump on the left hand side (unlike the screenshot). I've been adding them to the HBoxLayout with Qt::alignLeft. What am I doing wrong?

 QTextBrowser *centralWidget = new QTextBrowser;
    centralWidget->setPlainText(tr("Central widget"));

    BorderLayout *layout = new BorderLayout;

    QWidget *menu = new QWidget();
    QVBoxLayout *vboxLayout = new QVBoxLayout();
    QWidget *menu1 = new QWidget();
    vboxLayout->addWidget(menu1);
    QHBoxLayout *hboxLayout = new QHBoxLayout();
    QToolButton *b1 = new QToolButton();
    QToolButton *b2 = new QToolButton();
    hboxLayout->addWidget(b1,Qt::AlignLeft);
    hboxLayout->addWidget(b2,Qt::AlignLeft);
    menu1->setLayout(hboxLayout);
    menu->setLayout(vboxLayout);

    QPalette pal = palette();
    // set black background
    pal.setColor(QPalette::Window, Qt::black);
    menu->setAutoFillBackground(true);
    menu->setPalette(pal);

    QPalette pal2 = palette();
    // set dark red background
    pal2.setColor(QPalette::Window, Qt::darkRed);
    menu1->setAutoFillBackground(true);
    menu1->setPalette(pal2);



    layout->addWidget(centralWidget, BorderLayout::Center);
    layout->addWidget(menu, BorderLayout::North);
    layout->addWidget(createLabel("West"), BorderLayout::West);
    layout->addWidget(createLabel("East 1"), BorderLayout::East);
    layout->addWidget(createLabel("East 2") , BorderLayout::East);
    layout->addWidget(createLabel("South"), BorderLayout::South);
    setLayout(layout);

    setWindowTitle(tr("Border Layout"));

hbox align issue.png

jsulm

@jkwok678 Take a look at https://doc.qt.io/qt-5/qspaceritem.html
Especially "QHBoxLayout addSpacing(), addStretch(), insertSpacing(), insertStretch()"

jkwok678

I'm just wondering if this is the only way to do it? Is there a more elegant way to do it so that it can work with a GUI that changes when the window changes size?

SGaist

Hi,

What changes do you have in mind ?

jkwok678

For example what happens with the spacers, when the window size isn't big enough to justify them being there, as in it distorts the other elements in the GUI?

Bonnie

@jkwok678
The spacers are just suitable for a changing window size.
When there's no enough space, their size will shrink to zero.

jkwok678

So I'm just wondering is there any point using Qt::Align___?