/* This file is part of the KDE libraries
    Copyright (C) 2006,2007 Andreas Hartmetz (ahartmetz@gmail.com)
    Copyright (C) 2008 Michael Jansen <kde@michael-jansen.biz>
    Copyright (C) 2008 Alexander Dymo <adymo@kdevelop.org>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#ifndef KSHORTCUTSDIALOG_P_H
#define KSHORTCUTSDIALOG_P_H

#include "kgesture.h"

#include "kextendableitemdelegate.h"
#include "kshortcutseditor.h"
#include "kkeysequencewidget.h"

#include <QKeySequence>
#include <QMetaType>
#include <QModelIndex>
#include <QTreeWidget>
#include <QtCore/QList>
#include <QGroupBox>

class QLabel;
class QTreeWidget;
class QTreeWidgetItem;
class QRadioButton;
class KAction;
class KActionCollection;
class KPushButton;
class KComboBox;
class KShortcutsDialog;

enum ColumnDesignation {
    Name = 0,
    LocalPrimary,
    LocalAlternate,
    GlobalPrimary,
    GlobalAlternate,
    RockerGesture,
    ShapeGesture,
    Id
};


enum MyRoles {
    ShortcutRole = Qt::UserRole,
    DefaultShortcutRole,
    ObjectRole
};


/**
 * Type used for QTreeWidgetItems
 *
 * @internal
 */
enum ItemTypes {
    NonActionItem = 0,
    ActionItem = 1
};


/**
 * Mixes the KShortcutWidget into the treeview used by KShortcutsEditor. When selecting an shortcut
 * it changes the display from "CTRL-W" to the Widget.
 *
 * @bug That delegate uses KExtendableItemDelegate. That means a cell can be expanded. When selected
 * a cell is replaced by a KShortcutsEditor. When painting the widget KExtendableItemDelegate
 * reparents the widget to the viewport of the itemview it belongs to. The widget is destroyed when
 * the user selects another shortcut or explicitly issues a contractItem event. But when the user
 * clears the model the delegate misses that event and doesn't delete the KShortcutseditor. And
 * remains as a visible artefact in your treeview. Additionally when closing your application you get
 * an assertion failure from KExtendableItemDelegate.
 *
 * @internal
 */
class KShortcutsEditorDelegate : public KExtendableItemDelegate
{
    Q_OBJECT
public:
    KShortcutsEditorDelegate(QTreeWidget *parent, bool allowLetterShortcuts);
    //reimplemented to have some extra height
    virtual QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;

    /**
     * Set a list of action collections to check against for conflicting
     * shortcuts.
     *
     * @see KKeySequenceWidget::setCheckActionCollections
     */
    void setCheckActionCollections(const QList<KActionCollection*> checkActionCollections );

Q_SIGNALS:
    void shortcutChanged(QVariant, const QModelIndex &);
public Q_SLOTS:
    void hiddenBySearchLine(QTreeWidgetItem *, bool);
protected:
    virtual bool eventFilter(QObject *, QEvent *);
private:
    mutable QPersistentModelIndex m_editingIndex;
    bool m_allowLetterShortcuts;
    QWidget *m_editor;

    //! List of actionCollections to check for conflicts.
    QList<KActionCollection*> m_checkActionCollections;

private Q_SLOTS:
    void itemActivated(QModelIndex index);

    /**
     * When the user collapses a hole subtree of shortcuts then remove eventually
     * extended items. Else we get that artefact bug. See above.
     */
    void itemCollapsed(QModelIndex index );

    /**
     * If the user allowed stealing a shortcut we want to be able to undo
     * that.
     */
    void stealShortcut(const QKeySequence &seq, KAction *action);

    void keySequenceChanged(const QKeySequence &);
    void shapeGestureChanged(const KShapeGesture &);
    void rockerGestureChanged(const KRockerGesture &);

};


/**
 * That widget draws the decoration for KShortCutWidget. That widget is currently the only user.
 *
 * @internal
 */
class TabConnectedWidget : public QWidget
{
    Q_OBJECT
public:
    TabConnectedWidget(QWidget *parent)
     : QWidget(parent) {}
protected:
    void paintEvent(QPaintEvent *pe);
};


/**
 * Edit a shortcut. Let you select between using the default shortcut and configuring your own.
 *
 * @internal
 */
class ShortcutEditWidget : public TabConnectedWidget
{
    Q_OBJECT
public:
    ShortcutEditWidget(QWidget *viewport, const QKeySequence &defaultSeq, const QKeySequence &activeSeq,
                       bool allowLetterShortcuts);

    //! @see KKeySequenceWidget::setCheckActionCollections()
    void setCheckActionCollections( const QList<KActionCollection*> checkActionCollections);


    //@{
    //! @see KKeySequenceWidget::checkAgainstStandardShortcuts()
    KKeySequenceWidget::ShortcutTypes checkForConflictsAgainst() const;
    void setCheckForConflictsAgainst(KKeySequenceWidget::ShortcutTypes);
    //@}

    //@{
    //! @see KKeySequenceWidget::checkAgainstStandardShortcuts()
    bool multiKeyShortcutsAllowed() const;
    void setMultiKeyShortcutsAllowed(bool);
    //@}

    //! @see KKeySequenceWidget::setComponentName
    void setComponentName(const QString componentName);

public Q_SLOTS:

    //! Set the displayed sequences
    void setKeySequence(const QKeySequence &activeSeq);

Q_SIGNALS:

    //! Emitted when the key sequence is changed.
    void keySequenceChanged(const QKeySequence &);

    //! @see KKeySequenceWidget::stealShortcut()
    void stealShortcut(const QKeySequence &seq, KAction *action);

private Q_SLOTS:

    void defaultToggled(bool);
    void setCustom(const QKeySequence &);

private:
    QLabel *m_defaultLabel;
    QKeySequence m_defaultKeySequence;
    QRadioButton *m_defaultRadio;
    QRadioButton *m_customRadio;
    KKeySequenceWidget *m_customEditor;
    bool m_isUpdating;
};

Q_DECLARE_METATYPE(KShapeGesture)
Q_DECLARE_METATYPE(KRockerGesture)


class KShortcutSchemesEditor: public QGroupBox {
    Q_OBJECT
public:
    KShortcutSchemesEditor(KShortcutsDialog *parent);

    /** @return the currently selected scheme in the editor (may differ from current app's scheme.*/
    QString currentScheme();

private Q_SLOTS:
    void newScheme();
    void deleteScheme();
    void exportShortcutsScheme();
    void saveAsDefaultsForScheme();

Q_SIGNALS:
    void shortcutsSchemeChanged(const QString&);

protected:
    void updateDeleteButton();

private:
    KPushButton *m_newScheme;
    KPushButton *m_deleteScheme;
    KPushButton *m_exportScheme;
    KComboBox *m_schemesList;

    KShortcutsDialog *m_dialog;
};


class KAction;
class KShortcut;
class KShapeGesture;
class KRockerGesture;

/**
 * A QTreeWidgetItem that can handle KActions.
 *
 * It provides undo, commit functionality for changes made. Changes are effective immediately. You
 * have to commit them or they will be undone when deleting the item.
 *
 * @internal
 */
class KShortcutsEditorItem : public QTreeWidgetItem
{
public:

    KShortcutsEditorItem(QTreeWidgetItem *parent, KAction *action);

    /**
     * Destructor
     *
     * Will undo pending changes. If you don't want that. Call commitChanges before
     */
    virtual ~KShortcutsEditorItem();

    //! Undo the changes since the last commit.
    void undo();

    //! Commit the changes.
    void commit();

    virtual QVariant data(int column, int role = Qt::DisplayRole) const;
    virtual bool operator<(const QTreeWidgetItem &other) const;

    QKeySequence keySequence(uint column) const;
    void setKeySequence(uint column, const QKeySequence &seq);
    void setShapeGesture(const KShapeGesture &gst);
    void setRockerGesture(const KRockerGesture &gst);

    bool isModified(uint column) const;
    bool isModified() const;

    void setNameBold(bool flag) { m_isNameBold = flag; }

private:
    friend class KShortcutsEditorPrivate;

    //! Recheck modified status - could have changed back to initial value
    void updateModified();

    //! The action this item is responsible for
    KAction *m_action;

    //! Should the Name column be painted in bold?
    bool m_isNameBold;

    //@{
    //! The original shortcuts before user changes. 0 means no change.
    KShortcut *m_oldLocalShortcut;
    KShortcut *m_oldGlobalShortcut;
    KShapeGesture *m_oldShapeGesture;
    KRockerGesture *m_oldRockerGesture;
    //@}

    //! The localized action name
    QString m_actionNameInTable;

    //! The action id. Needed for exporting and importing
    QString m_id;

};


// NEEDED FOR KShortcutsEditorPrivate
#include "ui_kshortcutsdialog.h"
#include "kstandardshortcut.h"

// Hack to make two protected methods public.
// Used by both KShortcutsEditorPrivate and KShortcutsEditorDelegate
class QTreeWidgetHack : public QTreeWidget
{
public:
    QTreeWidgetItem *itemFromIndex(const QModelIndex &index) const
        { return QTreeWidget::itemFromIndex(index); }
    QModelIndex indexFromItem(QTreeWidgetItem *item, int column) const
        { return QTreeWidget::indexFromItem(item, column); }
};

/**
 * This class should belong into kshortcutseditor.cpp. But kshortcutseditordelegate uses a static
 * function of this class. So for now it's here. But i will remove it later.
 *
 * @internal
 */
class KShortcutsEditorPrivate
{
public:

    KShortcutsEditorPrivate(KShortcutsEditor *q);

    void initGUI( KShortcutsEditor::ActionTypes actionTypes, KShortcutsEditor::LetterShortcuts allowLetterShortcuts );
    void appendToView( uint nList, const QString &title = QString() );
    //used in appendToView
    QTreeWidgetItem *findOrMakeItem(QTreeWidgetItem *parent, const QString &name);

    static KShortcutsEditorItem *itemFromIndex(QTreeWidget *const w, const QModelIndex &index);

    // Set all shortcuts to their default values (bindings).
    void allDefault();

    // clear all shortcuts
    void clearConfiguration();

    // Import shortcuts from file
    void importConfiguration(KConfigBase *config);

    //helper functions for conflict resolution
    bool stealShapeGesture(KShortcutsEditorItem *item, const KShapeGesture &gest);
    bool stealRockerGesture(KShortcutsEditorItem *item, const KRockerGesture &gest);

    //conflict resolution functions
    void changeKeyShortcut(KShortcutsEditorItem *item, uint column, const QKeySequence &capture);
    void changeShapeGesture(KShortcutsEditorItem *item, const KShapeGesture &capture);
    void changeRockerGesture(KShortcutsEditorItem *item, const KRockerGesture &capture);

// private slots
    //this invokes the appropriate conflict resolution function
    void capturedShortcut(const QVariant &, const QModelIndex &);

    //! Represents the three hierarchies the dialog handles.
    enum hierarchyLevel {Root = 0, Program, Action};

    /**
     * Add @a action at @a level. Checks for QActions and unnamed actions
     * before adding.
     *
     * @return true if the actions was really added, false if not
     */
    bool addAction(QAction *action, QTreeWidgetItem *hier[], hierarchyLevel level);

    void printShortcuts() const;

// members
    QList<KActionCollection *> actionCollections;
    KShortcutsEditor *q;

    Ui::KShortcutsDialog ui;

    KShortcutsEditor::ActionTypes actionTypes;
    KShortcutsEditorDelegate *delegate;

};


Q_DECLARE_METATYPE(KShortcutsEditorItem *)

#endif /* KSHORTCUTSDIALOG_P_H */

//kate: space-indent on; indent-width 4; replace-tabs on;tab-width 4;