File indexing completed on 2024-04-14 05:37:12

 /***************************************************************************
  *   Copyright (C) 2005-2006 David Saxton <david@bluehaze.org>             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   (at your option) any later version.                                   *
  ***************************************************************************/
 
 #ifndef VIEWCONTAINER_H
 #define VIEWCONTAINER_H
 
 // #include <q3dragobject.h>
 #include <QList>
 #include <QMap>
 #include <QPointer>
 #include <QSplitter>
 
 class KConfigGroup;
 class KTechlab;
 class View;
 class ViewArea;
 class ViewContainer;
 
 class KConfig;
 class QHBoxLayout;
 class QLayout;
 class QSplitter;
 
 typedef QMap<uint, ViewArea *> ViewAreaMap;
 typedef QList<int> IntList;
 
 /**
 Before a ViewAre has been given a view, this is shown.
 \author David Saxton
 */
 class EmptyViewArea : public QWidget
 {
     Q_OBJECT
 public:
     EmptyViewArea(ViewArea *parent);
     ~EmptyViewArea() override;
 
 protected slots:
     void openDocument();
 
 protected:
     ViewArea *m_pViewArea;
 };
 
 /**
 Contains either exactly one View, or two ViewAreas, separated by a QSplitter.
 If it contains one view, then the value returned in id() is that of the view.
 If it contains two ViewAreas, then the value returned by id() is -1.
 @author David Saxton
 */
 class ViewArea : public QSplitter
 {
     Q_OBJECT
 public:
     enum Position { Right, Bottom };
 
     ViewArea(QWidget *parent, ViewContainer *viewContainer, int id, bool showOpenButton);
     ~ViewArea() override;
 
     ViewContainer *viewContainer() const
     {
         return p_viewContainer;
     }
     int id() const
     {
         return m_id;
     }
     /**
      * Splits this ViewArea into two, and returns a pointer to the new ViewArea
      * @param showOpenButton Whether to present the user with the EmptyViewArea
      * widget (i.e. the new ViewArea is not destined to be immediately filled
      * with a view).
      */
     ViewArea *createViewArea(Position position, uint id, bool showOpenButton);
     /**
      * Adds the given View to the main part of the layout
      */
     void setView(View *view);
     /**
      * Saves the state of this ViewArea and any contained ViewAreas
      */
     void saveState(KConfigGroup *config);
     /**
      * Restores the state of this ViewArea and any contained ViewAreas
      * @param groupName e.g. "ViewContainer 1"
      */
     void restoreState(KConfigGroup *config, int id, const QString &groupName);
     /**
      * Returns true if this ViewArea can save useful information as to its state
      * (i.e. it's children can save useful information about their state, or has
      * a view with a url in it)
      */
     bool canSaveUsefulStateInfo() const;
 
     static QString fileKey(int id);
     static QString containsKey(int id);
     static QString orientationKey(int id);
 
     View *view() const
     {
         return p_view;
     }
 
 protected slots:
     void viewAreaDestroyed(QObject *obj);
     void viewDestroyed();
 
 protected:
     int m_id;
     EmptyViewArea *m_pEmptyViewArea;
     QPointer<View> p_view;
     ViewArea *p_viewArea1;
     ViewArea *p_viewArea2;
     ViewContainer *p_viewContainer;
 };
 
 /**
 @author David Saxton
 */
 class ViewContainer : public QWidget
 {
     Q_OBJECT
 public:
     /**
      * Constructs a new ViewContainer, along with a default ViewArea ready for
      * parenting a View, with an id of 0. parent is only used if ktechlab is
      * null; otherwise the parent widget is ktechlab's tabWidget()
      */
     ViewContainer(const QString &caption, QWidget *parent = nullptr);
     ~ViewContainer() override;
 
     /**
      * Returns the view in the ViewArea with the given id
      */
     View *view(uint id) const;
     /**
      * Returns the ViewArea with the given id
      */
     ViewArea *viewArea(uint id) const;
     /**
      * The active view area is the one that is focused.
      */
     void setActiveViewArea(uint id);
     /**
      * Returns the id of the active ViewArea
      */
     uint activeViewArea() const
     {
         return m_activeViewArea;
     }
     /**
      * Returns a pointer to the view of the active view area
      */
     View *activeView() const
     {
         return view(activeViewArea());
     }
     /**
      * Attempts to close the given viewarea, returning true if successful (i.e
      * if the user did not object to the close request )
      */
     bool closeViewArea(uint id);
     /**
      * Creates a view area (parent QWidget, splitter et al) ready for inclusion
      * of a view.
      * @param relativeViewArea the viewarea to position the new viewarea next to, if -1 then is taken to be the active view area
      * @param position Top, Right, Bottom or Left of given relativeViewArea
      * @returns id of the view area, or -1 if unsucessful
      * @param showOpenButton Whether to present the user with the EmptyViewArea
      * widget (i.e. the new ViewArea is not destined to be immediately filled
      * with a view).
      */
     int createViewArea(int relativeViewArea, ViewArea::Position position, bool showOpenButton);
     /**
      * Attempts to close each view area, returning false if any fail to be
      * closed
      */
     bool closeViewContainer();
     /**
      * @returns number of views in this view container
      */
     uint viewCount() const
     {
         return m_viewAreaMap.size();
     }
     /**
      * Sets the pointer to the view area with the given id
      */
     void setViewAreaId(ViewArea *viewArea, uint id);
     /**
      * Removes a ViewArea from internal lists
      */
     void setViewAreaRemoved(uint id);
     /**
      * Sets the id to be "used"
      */
     void setIdUsed(int id);
     /**
      * Writes the state of the View Container (layout of views and view URLs)
      * to the given KConfig. Doesn't change the group - so preset it if
      * needed!
      */
     void saveState(KConfigGroup *config);
     /**
      * Reads in the saved config state (as written by saveState), and restores
      * the ViewContainer with all appropriate views open
      * @param groupName e.g. "ViewContainer 1"
      */
     void restoreState(KConfigGroup *config, const QString &groupName);
     /**
      * Returns a unique id (negative) for a ViewArea that is now a Parent of other ViewAreas
      */
     int uniqueParentId();
     /**
      * Returns a unique id (positive) for a new ViewArea
      */
     int uniqueNewId();
     /**
      * Returns true if this ViewArea can save useful information as to its state
      * (i.e. it's children can save useful information about their state, or has
      * a view with a url in it)
      */
     bool canSaveUsefulStateInfo() const;
 
 public slots:
     /**
      * Sets the tab caption et al from the contents of this ViewContainer
      */
     void updateCaption();
 
 protected slots:
     void baseViewAreaDestroyed(QObject *obj);
 
 protected:
     void restoreViewArea(KConfigGroup *config, int id, ViewArea *viewArea);
     void findActiveViewArea();
     int m_activeViewArea;
     ViewArea *m_baseViewArea;
     ViewAreaMap m_viewAreaMap;
     IntList m_usedIDs;
     bool b_deleted;
 };
 
 #endif