src/search/widgetmenu.cpp

   1 /*
   2     SPDX-FileCopyrightText: 2025 Felix Ernst <felixernst@kde.org>
   3
   4     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
   5 */
   6
   7 #include "widgetmenu.h"
   8
   9 #include <QApplication>
  10 #include <QShowEvent>
  11 #include <QWidgetAction>
  12
  13 using namespace Search;
  14
  15 Search::WidgetMenu::WidgetMenu(QWidget *parent)
  16     : QMenu{parent}
  17 {
  18     connect(
  19         this,
  20         &QMenu::aboutToShow,
  21         this,
  22         [this]() {
  23             auto widgetAction = new QWidgetAction{this};
  24             auto widget = init();
  25             Q_CHECK_PTR(widget);
  26             widgetAction->setDefaultWidget(widget); // Transfers ownership to the widgetAction.
  27             addAction(widgetAction);
  28         },
  29         Qt::SingleShotConnection);
  30 }
  31
  32 bool WidgetMenu::focusNextPrevChild(bool next)
  33 {
  34     return QWidget::focusNextPrevChild(next);
  35 }
  36
  37 void WidgetMenu::mouseReleaseEvent(QMouseEvent *event)
  38 {
  39     return QWidget::mouseReleaseEvent(event);
  40 }
  41
  42 void WidgetMenu::resizeToFitContents()
  43 {
  44     auto *widgetAction = static_cast<QWidgetAction *>(actions().constFirst());
  45     auto focusedChildWidget = QApplication::focusWidget();
  46     if (!widgetAction->defaultWidget()->isAncestorOf(focusedChildWidget)) {
  47         focusedChildWidget = nullptr;
  48     }
  49
  50     // Removing and readding the widget triggers the resize.
  51     removeAction(widgetAction);
  52     addAction(widgetAction);
  53
  54     // The previous removing and readding removed the focus from any child widgets. We return the focus to where it was.
  55     if (focusedChildWidget) {
  56         focusedChildWidget->setFocus();
  57     }
  58 }
  59
  60 void WidgetMenu::showEvent(QShowEvent *event)
  61 {
  62     if (!event->spontaneous()) {
  63         auto widgetAction = static_cast<QWidgetAction *>(actions().constFirst());
  64         widgetAction->defaultWidget()->setFocus();
  65     }
  66     QMenu::showEvent(event);
  67 }