src/disabledactionnotifier.cpp

   1 /*
   2  * SPDX-FileCopyrightText: 2024 Jin Liu <m.liu.jin@gmail.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-or-later
   5  */
   6
   7 #include "disabledactionnotifier.h"
   8
   9 DisabledActionNotifier::DisabledActionNotifier(QObject *parent)
  10     : QObject(parent)
  11 {
  12 }
  13
  14 void DisabledActionNotifier::setDisabledReason(QAction *action, QStringView reason)
  15 {
  16     if (action->isEnabled()) {
  17         return;
  18     }
  19
  20     if (m_shortcuts.contains(action)) {
  21         clearDisabledReason(action);
  22     }
  23
  24     QShortcut *shortcut = new QShortcut(action->shortcut(), parent());
  25     m_shortcuts.insert(action, shortcut);
  26
  27     connect(
  28         action,
  29         &QAction::enabledChanged,
  30         this,
  31         [this, action](bool enabled) {
  32             if (enabled && m_shortcuts.contains(action)) {
  33                 m_shortcuts.take(action)->deleteLater();
  34             }
  35         },
  36         Qt::SingleShotConnection);
  37
  38     // Don't capture QStringView, as it may reference a temporary QString
  39     QString reasonString = reason.toString();
  40     connect(shortcut, &QShortcut::activated, this, [this, action, reasonString]() {
  41         Q_EMIT disabledActionTriggered(action, reasonString);
  42     });
  43 }
  44
  45 void DisabledActionNotifier::clearDisabledReason(QAction *action)
  46 {
  47     if (action->isEnabled()) {
  48         return;
  49     }
  50
  51     action->disconnect(this);
  52     if (m_shortcuts.contains(action)) {
  53         m_shortcuts.take(action)->deleteLater();
  54     }
  55 }
  56
  57 #include "moc_disabledactionnotifier.cpp"