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 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2000 Reginald Stadlbauer <reggie@kde.org>
     SPDX-FileCopyrightText: 1997 Stephan Kulow <coolo@kde.org>
     SPDX-FileCopyrightText: 1997-2000 Sven Radej <radej@kde.org>
     SPDX-FileCopyrightText: 1997-2000 Matthias Ettrich <ettrich@kde.org>
     SPDX-FileCopyrightText: 1999 Chris Schlaeger <cs@kde.org>
     SPDX-FileCopyrightText: 2002 Joseph Wenninger <jowenn@kde.org>
     SPDX-FileCopyrightText: 2005-2006 Hamish Rodda <rodda@kde.org>
     SPDX-FileCopyrightText: 2000-2008 David Faure <faure@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-only
 */
 
 #ifndef KMAINWINDOW_H
 #define KMAINWINDOW_H
 
 #include <kxmlgui_export.h>
 
 #include <QMainWindow>
 #include <memory>
 
 class QMenu;
 class KConfig;
 class KConfigGroup;
 class KMWSessionManager;
 class KMainWindowPrivate;
 class KToolBar;
 
 /**
  * @class KMainWindow kmainwindow.h KMainWindow
  *
  * @brief KMainWindow represents a top-level main window.
  *
  * It extends QMainWindow with session management capabilities. For ready-made window functionality and simpler UI management, use KXmlGuiWindow instead.
  *
  * Define the minimum/maximum height/width of your central widget and KMainWindow will take this into account.
  * For fixed size windows set your main widget to a fixed size. Fixed aspect ratios (QWidget::heightForWidth()) and fixed width widgets are not supported.
  *
  * Use toolBar() to generate a main toolbar "mainToolBar" or refer to a specific toolbar.
  * For a simpler way to manage your toolbars, use KXmlGuiWindow::setupGUI() instead.
  *
  * Use setAutoSaveSettings() to automatically save and restore the window geometry and toolbar/menubar/statusbar state when the application is restarted.
  *
  * Use kRestoreMainWindows() in your main function to restore your windows when the session is restored.
  *
  * The window state is saved when the application is exited.
  * Reimplement queryClose() to warn the user of unsaved data upon close or exit.
  *
  * Reimplement saveProperties() / readProperties() or saveGlobalProperties() / readGlobalProperties()
  * to save/restore application-specific state during session management.
  *
  * Note that session saving is automatically called, session restoring is not,
  * and so it needs to be implemented in your main() function.
  *
  * See https://develop.kde.org/docs/use/session-managment for more information on session management.
  */
 
 class KXMLGUI_EXPORT KMainWindow : public QMainWindow
 {
     friend class KMWSessionManager;
     friend class DockResizeListener;
     Q_OBJECT
     Q_PROPERTY(bool hasMenuBar READ hasMenuBar)
     Q_PROPERTY(bool autoSaveSettings READ autoSaveSettings)
     Q_PROPERTY(QString autoSaveGroup READ autoSaveGroup)
 
 public:
     /**
      * @brief Constructs a main window.
      *
      * @param parent The parent widget. This is usually @c nullptr, but it may also be
      * the window group leader. In that case,
      * the KMainWindow becomes a secondary window.
      *
      * @param flags Specify the window flags. The default is none.
      *
      * Note that by default a KMainWindow is created with the
      * Qt::WA_DeleteOnClose attribute set, i.e. it is automatically destroyed
      * when the window is closed. If you do not want this behavior, call
      * \code
      * window->setAttribute(Qt::WA_DeleteOnClose, false);
      * \endcode
      *
      * KMainWindows must be created on the heap with 'new', like:
      * \code
      * KMainWindow *kmw = new KMainWindow(...);
      * kmw->setObjectName(...);
      * \endcode
      *
      * Since KDE Frameworks 5.16, KMainWindow will enter information regarding
      * the application's translators by default, using KAboutData::setTranslator(). This only occurs
      * if no translators are already assigned in KAboutData (see KAboutData::setTranslator() for
      * details -- the auto-assignment here uses the same translated strings as specified for that
      * function).
      *
      * IMPORTANT: For session management and window management to work
      * properly, all main windows in the application should have a
      * different name. Otherwise, KMainWindow will create
      * a unique name, but it's recommended to explicitly pass a window name that will
      * also describe the type of the window. If there can be several windows of the same
      * type, append '#' (hash) to the name, and KMainWindow will replace it with numbers to make
      * the names unique. For example, for a mail client which has one main window showing
      * the mails and folders, and which can also have one or more windows for composing
      * mails, the name for the folders window should be e.g. "mainwindow" and
      * for the composer windows "composer#".
      *
      * @see KAboutData
      */
     explicit KMainWindow(QWidget *parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags());
 
     /**
      * @brief Destructor.
      *
      * Will also destroy the toolbars and menubar if
      * needed.
      */
     ~KMainWindow() override;
 
     /**
      * @param numberOfInstances The number of KMainWindow instances in the application.
      * @returns @c true if the number of KMainWindow instances of the previous session did contain the requested @p numberOfInstances, @c false otherwise.
      * @see restore()
      **/
     static bool canBeRestored(int numberOfInstances);
 
     /**
      * @brief Useful if your application uses
      * different kinds of top-level windows.
      *
      * @returns The class name of the top-level window to be restored
      * that corresponds to @p instanceNumber.
      *
      * @param instanceNumber
      * @see restore()
      */
     static const QString classNameOfToplevel(int instanceNumber);
 
     /**
      * @brief Attempt to restore the top-level widget as defined by @p numberOfInstances (1..X).
      *
      * You should call canBeRestored() first.
      *
      * If the session did not contain so high a number, the configuration
      * is not changed and @c false is returned.
      *
      * That means clients could simply do the following:
      * \code
      * if (qApp->isSessionRestored()){
      *   int n = 1;
      *   while (KMainWindow::canBeRestored(n)){
      *     (new childMW)->restore(n);
      *     n++;
      *   }
      * } else {
      *   // create default application as usual
      * }
      * \endcode
      * Note that if @p show is @c true (default), QWidget::show() is called
      * implicitly in restore.
      *
      * With this you can easily restore all top-level windows of your
      * application.
      *
      * If your application uses different kinds of top-level
      * windows, then you can use KMainWindow::classNameOfToplevel(n)
      * to determine the exact type before calling the childMW
      * constructor in the example from above.
      *
      * @note You don't need to deal with this function. Use the
      * kRestoreMainWindows() convenience template function instead!
      *
      * @param numberOfInstances The number of KMainWindow instances from the last session.
      * @param show Whether the KMainWindow instances will be visible by default.
      *
      * @returns @c true if the session contained
      * the same number of instances as the requested number,
      * @c false if the session contained less instances than the requested number,
      * in which case no configuration is changed.
      *
      * @see kRestoreMainWindows()
      * @see readProperties()
      * @see canBeRestored()
      */
     bool restore(int numberOfInstances, bool show = true);
 
     /**
      * @returns @c true if there is a menubar, @c false otherwise.
      */
     bool hasMenuBar();
 
     /**
      * @returns The list of members of the KMainWindow class.
      */
     static QList<KMainWindow *> memberList();
 
     /**
      * @brief This is useful to both call specific toolbars that have been created
      * or to generate a default one upon call.
      *
      * This refers to toolbars created dynamically from the XML UI
      * framework via KConfig or appnameui.rc.
      *
      * If the toolbar does not exist, one will be created.
      *
      * @param name The internal name of the toolbar. If no name is
      *             specified, "mainToolBar" is assumed.
      *
      * @return A pointer to the toolbar with the specified name.
      * @see toolBars()
      **/
     KToolBar *toolBar(const QString &name = QString());
 
     /**
      * @return A list of all toolbars for this window
      */
     QList<KToolBar *> toolBars() const;
 
     /**
      * @brief This enables autosave of toolbar/menubar/statusbar settings
      * (and optionally window size).
      * @param groupName A name that identifies the type of window.
      * You can have several types of window in the same application.
      * If no @p groupName is specified, the value defaults to "MainWindow".
      *
      * @param saveWindowSize Whether to include the window size
      * when saving. @c true by default.
      *
      * If the *bars were modified when the window is closed,
      * saveMainWindowSettings( KConfigGroup(KSharedConfig::openConfig(), groupName) ) will be called.
      *
      * Typically, you will call setAutoSaveSettings() in your
      * KMainWindow-inherited class constructor, and it will take care
      * of restoring and saving automatically.
      *
      * By default, this generates an
      * appnamerc ini file as if using default KConfig constructor or KConfig::SimpleConfig.
      *
      * Make sure you call this @em after all your *bars have been created.
      *
      * To make sure that KMainWindow properly obtains the default
      * size of the window you should do the following:
      * - Remove hardcoded resize() calls in the constructor or main
      *   to let the automatic resizing determine the default window size.
      *   Hardcoded window sizes will be wrong for users that have big fonts,
      *   use different styles, long/small translations, large toolbars, and other factors.
      * - Put the setAutoSaveSettings() call after all widgets
      *   have been created and placed inside the main window
      *   (for most apps this means QMainWindow::setCentralWidget())
      * - QWidget-based objects should overload "virtual QSize sizeHint() const;"
      *   to specify a default size.
      * @see KConfig
      * @see KSharedConfig
      * @see saveMainWindowSettings()
      * @see toolBar()
      * @see KXmlGuiWindow::setupGUI()
      */
     void setAutoSaveSettings(const QString &groupName = QStringLiteral("MainWindow"), bool saveWindowSize = true);
 
     /**
      * This is an overloaded function.
      * This allows the settings to be saved into a different file
      * that does not correspond to that used for KSharedConfig::openConfig().
      * @see setAutoSaveSettings(const QString &groupName, bool saveWindowSize)
      * @see KConfig
      * @see KSharedConfig
      * @since 4.1
      */
     void setAutoSaveSettings(const KConfigGroup &group, bool saveWindowSize = true);
 
     /**
      * @brief Disables the autosave settings feature.
      * You don't normally need to call this, ever.
      * @see setAutoSaveSettings()
      * @see autoSaveSettings()
      */
     void resetAutoSaveSettings();
 
     /**
      * @return @c true if setAutoSaveSettings() was called,
      * @c false by default or if resetAutoSaveSettings() was called.
      * @see setAutoSaveSettings()
      * @see resetAutoSaveSettings()
      */
     bool autoSaveSettings() const;
 
     /**
      * @return The group used for autosaving settings.
      *
      * Do not mistake this with autoSaveConfigGroup.
      *
      * Only meaningful if setAutoSaveSettings(const QString&, bool) was called.
      *
      * Do not use this method if setAutoSaveSettings(const KConfigGroup&, bool) was called.
      *
      * This can be useful for forcing a save or an apply, e.g. before and after
      * using KEditToolBar.
      *
      * @note Prefer saveAutoSaveSettings() for saving or autoSaveConfigGroup() for loading.
      *
      * @see autoSaveSettings()
      * @see setAutoSaveSettings()
      * @see saveAutoSaveSettings()
      * @see resetAutoSaveSettings()
      * @see autoSaveConfigGroup()
      */
     QString autoSaveGroup() const;
 
     /**
      * @return The group used for autosaving settings.
      *
      * Only meaningful if setAutoSaveSettings(const QString&, bool) was called.
      *
      * Do not use this method if setAutoSaveSettings(const KConfigGroup&, bool) was called.
      *
      * This can be useful for forcing an apply, e.g. after using KEditToolBar.
      *
      * @see setAutoSaveSettings()
      * @see autoSaveGroup()
      * @since 4.1
      */
     KConfigGroup autoSaveConfigGroup() const;
 
     /**
      * @brief Assigns the config group name for the KConfigGroup returned by stateConfigGroup.
      * @param configGroup The config group to be assigned.
      * Window size and state are stored in the resulting KConfigGroup when this function is called.
      * @note If this is used in combination with setAutoSaveSettings, you should call this method first.
      *
      * @see KConfigGroup()
      * @see KSharedConfig::openStateConfig()
      * @see stateConfigGroup()
      *
      * @since 5.88
      */
     void setStateConfigGroup(const QString &configGroup);
 
     /**
      * @returns The KConfigGroup used to store state data like window sizes or window state.
      *
      * The resulting group is invalid if setStateConfig is not called explicitly.
      *
      * @see KConfigGroup
      * @since 5.88
      */
     KConfigGroup stateConfigGroup() const;
 
     /**
      * @brief Read settings for statusbar, menubar and toolbar from their respective
      * groups in the config file and apply them.
      *
      * @param config Config group to read the settings from.
      */
     virtual void applyMainWindowSettings(const KConfigGroup &config);
 
     /**
      * @brief Manually save the settings for statusbar, menubar and toolbar to their respective
      * groups in the KConfigGroup @p config.
      *
      * Example:
      * \code
      * KConfigGroup group(KSharedConfig::openConfig(), "MainWindow");
      * saveMainWindowSettings(group);
      * \endcode
      *
      * @param config Config group to save the settings to.
      * @see setAutoSaveSettings()
      * @see KConfig
      * @see KSharedConfig
      * @see KConfigGroup
      */
     void saveMainWindowSettings(KConfigGroup &config);
 
     /**
      * @returns The path for the exported window's D-Bus object.
      * @since 4.0.1
      */
     QString dbusName() const;
 
 public Q_SLOTS:
     /**
      * @brief Assigns a KDE compliant caption (window title).
      *
      * @param caption The string that will be
      * displayed in the window title, before the application name.
      *
      * @note This function does the same as setPlainCaption().
      *
      * @note Do not include the application name
      * in this string. It will be added automatically according to the KDE
      * standard.
      *
      * @see setPlainCaption()
      */
     virtual void setCaption(const QString &caption);
     /**
      * @brief Makes a KDE compliant caption.
      * @param caption Your caption.
      * @param modified Whether the document is modified. This displays
      * an additional sign in the title bar, usually "**".
      *
      * This is an overloaded function.
      *
      * @note Do not include the application name
      * in this string. It will be added automatically according to the KDE
      * standard.
      */
     virtual void setCaption(const QString &caption, bool modified);
 
     /**
      * @brief Make a plain caption without any modifications.
      *
      * @param caption The string that will be
      * displayed in the window title, before the application name.
      *
      * @note This function does the same as setCaption().
      *
      * @note Do not include the application name
      * in this string. It will be added automatically according to the KDE
      * standard.
      *
      * @see setCaption()
      */
     virtual void setPlainCaption(const QString &caption);
 
     /**
      * @brief Opens the help page for the application.
      *
      * The application name is
      * used as a key to determine what to display and the system will attempt
      * to open \<appName\>/index.html.
      *
      * This method is intended for use by a help button in the toolbar or
      * components outside the regular help menu.
      *
      * Use helpMenu() when you
      * want to provide access to the help system from the help menu.
      *
      * Example (adding a help button to the first toolbar):
      *
      * \code
      * toolBar()->addAction(QIcon::fromTheme("help-contents"), i18n("Help"),
      *                       this, &KMainWindow::appHelpActivated);
      * \endcode
      *
      * @see helpMenu()
      * @see toolBar()
      */
     void appHelpActivated();
 
     /**
      * @brief Tell the main window that it should save its settings when being closed.
      *
      * This is part of the autosave settings feature.
      *
      * For everything related to toolbars this happens automatically,
      * but you have to call setSettingsDirty() in the slot that toggles
      * the visibility of the statusbar.
      *
      * @see saveAutoSaveSettings()
      */
     void setSettingsDirty();
 
 protected:
     /**
      * Reimplemented to catch QEvent::Polish in order to adjust the object name
      * if needed, once all constructor code for the main window has run.
      * Also reimplemented to catch when a QDockWidget is added or removed.
      */
     bool event(QEvent *event) override;
 
     /**
      * Reimplemented to open context menus on Shift+F10.
      */
     void keyPressEvent(QKeyEvent *keyEvent) override;
 
     /**
      * Reimplemented to autosave settings and call queryClose().
      *
      * We recommend that you reimplement queryClose() rather than closeEvent().
      * If you do it anyway, ensure to call the base implementation to keep
      * the feature of autosaving window settings working.
      */
     void closeEvent(QCloseEvent *) override;
 
     /**
      * @brief This function is called before the window is closed,
      * either by the user or indirectly by the session manager.
      *
      * This can be used to prompt the user to save unsaved data before the window is closed.
      *
      * Example:
      * \code
      * switch ( KMessageBox::warningTwoActionsCancel( this,
      *          i18n("Save changes to document foo?"), QString(),
      *          KStandardGuiItem::save(), KStandardGuiItem::discard())) ) {
      *   case KMessageBox::PrimaryAction :
      *     // save document here. If saving fails, return false;
      *     return true;
      *   case KMessageBox::SecondaryAction :
      *     return true;
      *   default: // cancel
      *     return false;
      * \endcode
      *
      * @note Do @em not close the document from within this method,
      * as it may be called by the session manager before the
      * session is saved. If the document is closed before the session save occurs,
      * its location might not be properly saved. In addition, the session shutdown
      * may be canceled, in which case the document should remain open.
      *
      * @return @c true by default, @c false according to the reimplementation.
      * Returning @c false will cancel the closing operation,
      * and if KApplication::sessionSaving() is true, it cancels logout.
      *
      * @see KApplication::sessionSaving()
      */
     virtual bool queryClose();
 
     /**
      * @brief Saves your instance-specific properties.
      *
      * The function is
      * invoked when the session manager requests your application
      * to save its state.
      *
      * Reimplement this function in child classes.
      *
      * \code
      * void MainWindow::saveProperties(KConfigGroup &config) {
      *   config.writeEntry("myKey", "newValue");
      *   ...
      * }
      * \endcode
      *
      * @note No user interaction is allowed
      * in this function!
      *
      */
     virtual void saveProperties(KConfigGroup &)
     {
     }
 
     /**
      * @brief Reads your instance-specific properties.
      *
      * This function is called indirectly by restore().
      *
      * \code
      * void MainWindow::readProperties(KConfigGroup &config) {
      *   if (config.hasKey("myKey")) {
      *     config.readEntry("myKey", "DefaultValue");
      *   }
      *   ...
      * }
      * \endcode
      *
      * @see readGlobalProperties()
      */
     virtual void readProperties(const KConfigGroup &)
     {
     }
 
     /**
      * @brief Saves your application-wide properties.
      *
      * @param sessionConfig A pointer to the KConfig instance
      * used to save the session data.
      *
      * This function is invoked when the session manager
      * requests your application to save its state.
      * It is similar to saveProperties(), but it is only called for
      * the first main window. This is useful to save global state of your application
      * that isn't bound to a particular window.
      *
      * The default implementation does nothing.
      *
      * @see readGlobalProperties()
      * @see saveProperties()
      */
     virtual void saveGlobalProperties(KConfig *sessionConfig);
 
     /**
      * @brief Reads your application-wide properties.
      *
      * @param sessionConfig A pointer to the KConfig instance
      * used to load the session data.
      *
      * @see saveGlobalProperties()
      * @see readProperties()
      *
      */
     virtual void readGlobalProperties(KConfig *sessionConfig);
     void savePropertiesInternal(KConfig *, int);
     bool readPropertiesInternal(KConfig *, int);
 
     /**
      * For inherited classes
      */
     bool settingsDirty() const;
 
 protected Q_SLOTS:
     /**
      * This slot should only be called in case you reimplement closeEvent() and
      * if you are using the autosave feature. In all other cases,
      * setSettingsDirty() should be called instead to benefit from the delayed
      * saving.
      *
      * Example:
      * \code
      *
      * void MyMainWindow::closeEvent( QCloseEvent *e )
      * {
      *   // Save settings if autosave is enabled, and settings have changed
      *   if ( settingsDirty() && autoSaveSettings() )
      *     saveAutoSaveSettings();
      *   ..
      * }
      * \endcode
      *
      * @see setAutoSaveSettings()
      * @see setSettingsDirty()
      */
     void saveAutoSaveSettings();
 
 protected:
     KXMLGUI_NO_EXPORT KMainWindow(KMainWindowPrivate &dd, QWidget *parent, Qt::WindowFlags f);
 
     std::unique_ptr<KMainWindowPrivate> const d_ptr;
 
 private:
     Q_DECLARE_PRIVATE(KMainWindow)
 
     Q_PRIVATE_SLOT(d_func(), void _k_slotSettingsChanged(int))
     Q_PRIVATE_SLOT(d_func(), void _k_slotSaveAutoSaveSize())
     Q_PRIVATE_SLOT(d_func(), void _k_slotSaveAutoSavePosition())
 };
 
 /**
  * @defgroup KXMLGUI_Session KXMLGUI Session Macros and Functions
  *
  * @{
  */
 
 /**
  * @def KDE_RESTORE_MAIN_WINDOWS_NUM_TEMPLATE_ARGS
  * Returns the maximal number of arguments that are actually
  * supported by kRestoreMainWindows().
  **/
 #define KDE_RESTORE_MAIN_WINDOWS_NUM_TEMPLATE_ARGS 3
 
 /**
  * @brief Restores the last session. (To be used in your main function).
  *
  * These functions work also if you have more than one kind of top-level
  * widget (each derived from KMainWindow, of course).
  *
  * Imagine you have three kinds of top-level widgets: the classes @c childMW1,
  * @c childMW2 and @c childMW3. Then you can just do:
  *
  * \code
  * int main(int argc, char *argv[])
  * {
  *     // [...]
  *     if (qApp->isSessionRestored())
  *         kRestoreMainWindows<childMW1, childMW2, childMW3>();
  *     else {
  *       // create default application as usual
  *     }
  *     // [...]
  * }
  * \endcode
  *
  * kRestoreMainWindows<>() will create (on the heap) as many instances
  * of your main windows as have existed in the last session and
  * call KMainWindow::restore() with the correct arguments. Note that
  * also QWidget::show() is called implicitly.
  *
  * Currently, these functions are provided for up to three
  * template arguments. If you need more, tell us. To help you in
  * deciding whether or not you can use kRestoreMainWindows, a
  * define #KDE_RESTORE_MAIN_WINDOWS_NUM_TEMPLATE_ARGS is provided.
  *
  * @note Prefer this function over directly calling KMainWindow::restore().
  *
  * @tparam T Top-level widget class
  *
  * @see KMainWindow::restore()
  * @see KMainWindow::classNameOfToplevel()
  **/
 template<typename T>
 inline void kRestoreMainWindows()
 {
     for (int n = 1; KMainWindow::canBeRestored(n); ++n) {
         const QString className = KMainWindow::classNameOfToplevel(n);
         if (className == QLatin1String(T::staticMetaObject.className())) {
             (new T)->restore(n);
         }
     }
 }
 
 /**
  * @brief Restores the last session.
  * This is an overloaded function.
  *
  * Use this with multiple different top-level widget classes.
  *
  * @tparam T0 One top-level widget class
  * @tparam T1 Explicit other top-level widget class for disambiguation from base template
  * @tparam Tn Parameter pack to take 0..n further KMainWindows
  * @see kRestoreMainWindows()
  */
 template<typename T0, typename T1, typename... Tn>
 inline void kRestoreMainWindows()
 {
     kRestoreMainWindows<T0>();
     kRestoreMainWindows<T1, Tn...>();
 }
 /** @}  */
 
 #endif