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POQTabWidget corner QToolButton widget disappearing
 

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  1. POQTabWidget corner QToolButton widget disappearing
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    <p>I have a QTabWidget with dynamically added and removed tabs. I have also a QToolButton set as a corner widget in order to handle add events on its <code>clicked()</code> signal.</p> <p>While adding works perfectly fine removing all tabs from the widget causes the button to disappear. I have tried using stylesheets to create a invisible first tab of width 0, but this approach failed me. Probably because I have <code>setTabsClosable(true)</code> on all tabs which makes space for the close button.</p> <p>I also thought that button is disappearing when QTabBar collapses its hight to 0 when there is no tabs. I tried to <code>tabBar()-&gt;setMinimumHeight(30);</code> but this workaround also didn't work. Any ideas?</p> <p>Here my code sample reproducing the problem:</p> <pre><code>#include "mainwindow.h" #include "ui_mainwindow.h" #include "QToolButton" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui-&gt;setupUi(this); ui-&gt;tabWidget-&gt;setTabsClosable(true); ui-&gt;tabWidget-&gt;tabBar()-&gt;setMinimumHeight(30); QToolButton *btn = new QToolButton(ui-&gt;tabWidget); btn-&gt;setText("Add new"); btn-&gt;setCursor(Qt::ArrowCursor); btn-&gt;setAutoRaise(true); ui-&gt;tabWidget-&gt;setCornerWidget(btn, Qt::TopLeftCorner); qDebug() &lt;&lt; ui-&gt;tabWidget-&gt;cornerWidget(Qt::TopLeftCorner); connect(ui-&gt;tabWidget, SIGNAL(tabCloseRequested(int)), this, SLOT(closeTab(int))); } MainWindow::~MainWindow() { delete ui; } //SLOT void MainWindow::closeTab(int index) { ui-&gt;tabWidget-&gt;removeTab(index); if(ui-&gt;tabWidget-&gt;count() == 0) qDebug() &lt;&lt; ui-&gt;tabWidget-&gt;cornerWidget(Qt::TopLeftCorner); } </code></pre>
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    1. PTQuestion
    1. USMateusz Andrzejewski
    1. USMateusz Andrzejewski
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    1. CODid you tried to test ui->tabWidget->cornerWidget() after deleting the last tab to see if it has been removed (== 0) ?
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      1. POQTabWidget corner QToolButton widget disappearing
      1. USSylvain V
    2. COYes, qDebug() run when ui->tabWidget->count() == 0 shows it is still there. Updated code with this test.
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      1. POQTabWidget corner QToolButton widget disappearing
      1. USMateusz Andrzejewski
 

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