File indexing completed on 2024-05-12 13:30:26

 /*
  * SPDX-FileCopyrightText: 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #ifndef breezewindowmanager_h
 #define breezewindowmanager_h
 
 #include "breeze.h"
 #include "breezestyleconfigdata.h"
 #include "config-breeze.h"
 
 #include <QEvent>
 
 #include <QApplication>
 #include <QBasicTimer>
 #include <QObject>
 #include <QSet>
 #include <QString>
 #include <QWidget>
 
 #if BREEZE_HAVE_QTQUICK
 #include <QQuickItem>
 #endif
 
 namespace Breeze
 {
 class WindowManager : public QObject
 {
     Q_OBJECT
 
 public:
     //* constructor
     explicit WindowManager(QObject *);
 
     //* initialize
     /** read relevant options from config */
     void initialize();
 
     //* register widget
     void registerWidget(QWidget *);
 
 #if BREEZE_HAVE_QTQUICK
     //* register quick item
     void registerQuickItem(QQuickItem *);
 #endif
 
     //* unregister widget
     void unregisterWidget(QWidget *);
 
     //* event filter [reimplemented]
     bool eventFilter(QObject *, QEvent *) override;
 
 protected:
     //* timer event,
     /** used to start drag if button is pressed for a long enough time */
     void timerEvent(QTimerEvent *) override;
 
     //* mouse press event
     bool mousePressEvent(QObject *, QEvent *);
 
     //* mouse move event
     bool mouseMoveEvent(QObject *, QEvent *);
 
     //* mouse release event
     bool mouseReleaseEvent(QObject *, QEvent *);
 
     //*@name configuration
     //@{
 
     //* enable state
     bool enabled() const
     {
         return _enabled;
     }
 
     //* enable state
     void setEnabled(bool value)
     {
         _enabled = value;
     }
 
     //* drag mode
     int dragMode() const
     {
         return _dragMode;
     }
 
     //* drag mode
     void setDragMode(int value)
     {
         _dragMode = value;
     }
 
     //* drag distance (pixels)
     void setDragDistance(int value)
     {
         _dragDistance = value;
     }
 
     //* drag delay (msec)
     void setDragDelay(int value)
     {
         _dragDelay = value;
     }
 
     //* set list of whiteListed widgets
     /**
     white list is read from options and is used to adjust
     per-app window dragging issues
     */
     void initializeWhiteList();
 
     //* set list of blackListed widgets
     /**
     black list is read from options and is used to adjust
     per-app window dragging issues
     */
     void initializeBlackList();
 
     //@}
 
     //* returns true if widget is dragable
     bool isDragable(QWidget *);
 
     //* returns true if widget is dragable
     bool isBlackListed(QWidget *);
 
     //* returns true if widget is dragable
     bool isWhiteListed(QWidget *) const;
 
     //* returns true if drag can be started from current widget
     bool canDrag(QWidget *);
 
     //* returns true if drag can be started from current widget and position
     /** child at given position is passed as second argument */
     bool canDrag(QWidget *, QWidget *, const QPoint &);
 
     //* reset drag
     void resetDrag();
 
     //* start drag
     void startDrag(QWindow *);
 
     //* utility function
     bool isDockWidgetTitle(const QWidget *) const;
 
     //*@name lock
     //@{
 
     void setLocked(bool value)
     {
         _locked = value;
     }
 
     //* lock
     bool isLocked() const
     {
         return _locked;
     }
 
     //@}
 
     //* returns first widget matching given class, or nullptr if none
     template<typename T>
     T findParent(const QWidget *) const;
 
 private:
     //* enability
     bool _enabled = true;
 
     //* drag mode
     int _dragMode = StyleConfigData::WD_FULL;
 
     //* drag distance
     /** this is copied from kwin::geometry */
     int _dragDistance = QApplication::startDragDistance();
 
     //* drag delay
     /** this is copied from kwin::geometry */
     int _dragDelay = QApplication::startDragTime();
 
     //* wrapper for exception id
     class ExceptionId
     {
     public:
         //* constructor
         explicit ExceptionId(const QString &value)
         {
             const QStringList args(value.split(QChar::fromLatin1('@')));
             if (args.isEmpty()) {
                 return;
             }
             _exception.second = args[0].trimmed();
             if (args.size() > 1) {
                 _exception.first = args[1].trimmed();
             }
         }
 
         const QString &appName() const
         {
             return _exception.first;
         }
 
         const QString &className() const
         {
             return _exception.second;
         }
 
     private:
         QPair<QString, QString> _exception;
 
         friend uint qHash(const ExceptionId &value)
         {
             return qHash(value._exception);
         }
 
         friend bool operator==(const ExceptionId &lhs, const ExceptionId &rhs)
         {
             return lhs._exception == rhs._exception;
         }
     };
 
     //* exception set
     using ExceptionSet = QSet<ExceptionId>;
 
     //* list of white listed special widgets
     /**
     it is read from options and is used to adjust
     per-app window dragging issues
     */
     ExceptionSet _whiteList;
 
     //* list of black listed special widgets
     /**
     it is read from options and is used to adjust
     per-app window dragging issues
     */
     ExceptionSet _blackList;
 
     //* drag point
     QPoint _dragPoint;
     QPoint _globalDragPoint;
 
     //* drag timer
     QBasicTimer _dragTimer;
 
     //* target being dragged
     /** Weak pointer is used in case the target gets deleted while drag is in progress */
     WeakPointer<QWidget> _target;
 
 #if BREEZE_HAVE_QTQUICK
     WeakPointer<QQuickItem> _quickTarget;
 #endif
 
     //* true if drag is about to start
     bool _dragAboutToStart = false;
 
     //* true if drag is in progress
     bool _dragInProgress = false;
 
     //* true if drag is locked
     bool _locked = false;
 
     //* true if the event we are intercepting passed trough a QQuickWidget.
     /**In this case we shouldn't start a drag, because if it was to start, we would have done it in the event filter of a qquickwidget.
      * Event handlers don't accept input events, but they do block QQuickItems to receive the event, so the event may have been
      * managed by an handler and not blocked by the root qml item.
      **/
     bool _eventInQQuickWidget = false;
 
     //* application event filter
     QObject *_appEventFilter = nullptr;
 
     //* allow access of all private members to the app event filter
     friend class AppEventFilter;
 };
 
 //____________________________________________________________________
 template<typename T>
 T WindowManager::findParent(const QWidget *widget) const
 {
     if (!widget) {
         return nullptr;
     }
     for (QWidget *parent = widget->parentWidget(); parent; parent = parent->parentWidget()) {
         if (T cast = qobject_cast<T>(parent)) {
             return cast;
         }
     }
 
     return nullptr;
 }
 
 }
 
 #endif