/*****************************************************************

Copyright (c) 1996-2004 the kicker authors. See file AUTHORS.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

******************************************************************/

#ifndef __containerarea_h__
#define __containerarea_h__

#include <qpixmap.h>
#include <qptrlist.h>
#include <qtimer.h>

#include <appletinfo.h>

#include "global.h"
#include "panner.h"
#include "container_base.h"

class KConfig;
class DragIndicator;
class PanelContainer;
class KRootPixmap;

class AppletContainer;
class ContainerAreaLayout;
class AddAppletDialog;

class ContainerArea : public Panner
{
    Q_OBJECT

public:
    ContainerArea( KConfig* config, QWidget* parent, QPopupMenu* opMenu, const char* name = 0 );
    ~ContainerArea();

    void initialize(bool useDefaultConfig);
    int position() const;
    KPanelApplet::Direction popupDirection() const;
    bool isImmutable() const;

    const QWidget* addButton(const AppletInfo& info);
    const QWidget* addKMenuButton();
    const QWidget* addDesktopButton();
    const QWidget* addWindowListButton();
    const QWidget* addBookmarksButton();
    const QWidget* addServiceButton(const QString& desktopFile);
    const QWidget* addURLButton(const QString &url);
    const QWidget* addBrowserButton();
    const QWidget* addBrowserButton(const QString &startDir,
                            const QString& icon = QString("kdisknav"));
    const QWidget* addServiceMenuButton(const QString& relPath);
    const QWidget* addNonKDEAppButton();
    const QWidget* addNonKDEAppButton(const QString &name,
                                      const QString &description,
                                      const QString &filePath,
                                      const QString &icon,
                                      const QString &cmdLine, bool inTerm);
    const QWidget* addExtensionButton(const QString& desktopFile);
    AppletContainer* addApplet(const AppletInfo& info,
                               bool isImmutable = false,
                               int insertionIndex = -1);

    void configure();

    bool inMoveOperation() const { return (_moveAC != 0); }
    int widthForHeight(int height) const;
    int heightForWidth(int width) const;

    const QPixmap* completeBackgroundPixmap() const;

    BaseContainer::List containers(const QString& type) const;
    int containerCount(const QString& type) const;
    QStringList listContainers() const;
    bool canAddContainers() const;

signals:
    void maintainFocus(bool);

public slots:
    void resizeContents(int w, int h);
    bool removeContainer(BaseContainer* a);
    bool removeContainer(int index);
    void removeContainers(BaseContainer::List containers);
    void takeContainer(BaseContainer* a);
    void setPosition(KPanelExtension::Position p);
    void setAlignment(KPanelExtension::Alignment a);
    void slotSaveContainerConfig();
    void repaint();
    void showAddAppletDialog();
    void addAppletDialogDone();

protected:
    QString createUniqueId(const QString& appletType) const;
    void completeContainerAddition(BaseContainer* container,
                                   int insertionIndex = -1);

    bool eventFilter(QObject*, QEvent*);
    void mouseMoveEvent(QMouseEvent*);
    void mouseReleaseEvent(QMouseEvent *);
    void dragEnterEvent(QDragEnterEvent*);
    void dragMoveEvent(QDragMoveEvent*);
    void dragLeaveEvent(QDragLeaveEvent*);
    void dropEvent(QDropEvent*);
    void resizeEvent(QResizeEvent*);
    void viewportResizeEvent(QResizeEvent*);

    void defaultContainerConfig();
    void loadContainers(const QStringList& containers);
    void saveContainerConfig(bool layoutOnly = false);

    QRect availableSpaceFollowing(BaseContainer*);
    void moveDragIndicator(int pos);

    void scrollTo(BaseContainer*);

    void addContainer(BaseContainer* a,
                      bool arrange = false,
                      int insertionIndex = -1);
    void removeAllContainers();

protected slots:
    void autoScroll();
    void updateBackground(const QPixmap&);
    void setBackground();
    void immutabilityChanged(bool);
    void updateContainersBackground();
    void startContainerMove(BaseContainer*);
    void resizeContents();
    void destroyCachedGeometry();

private:
    BaseContainer::List   m_containers;
    BaseContainer*  _moveAC;
    KPanelExtension::Position	    _pos;
    KConfig*	    _config;
    DragIndicator*  _dragIndicator;
    BaseContainer*  _dragMoveAC;
    QPoint	    _dragMoveOffset;
    QPopupMenu*     m_opMenu;
    KRootPixmap*    _rootPixmap;
    bool            _transparent;
    bool            _useBgTheme;
    bool            _bgSet;
    QPixmap         _completeBg;
    QTimer          _autoScrollTimer;
    bool            m_canAddContainers;
    bool            m_immutable;
    bool            m_updateBackgroundsCalled;

    QWidget*             m_contents;
    ContainerAreaLayout* m_layout;
    AddAppletDialog*     m_addAppletDialog;
    QMap< QWidget*, QRect > m_cachedGeometry;
};


class DragIndicator : public QWidget
{
    Q_OBJECT

public:
    DragIndicator(QWidget* parent = 0, const char* name = 0);
    ~DragIndicator() {}

    QSize preferredSize() const { return _preferredSize; }
    void setPreferredSize(const QSize& size) { _preferredSize = size; }

protected:
    void paintEvent(QPaintEvent*);
    void mousePressEvent(QMouseEvent*);

private:
    QSize _preferredSize;
};

#endif