gridctrl.hxx

Go to the documentation of this file.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
#ifndef INCLUDED_SVX_GRIDCTRL_HXX
#define INCLUDED_SVX_GRIDCTRL_HXX

#include <com/sun/star/util/Date.hpp>

#include <tools/ref.hxx>
#include <svtools/editbrowsebox.hxx>
#include <svtools/recorditemwindow.hxx>
#include <osl/mutex.hxx>
#include <svx/svxdllapi.h>
#include <o3tl/typed_flags_set.hxx>
#include <memory>
#include <vector>

namespace comphelper { class OPropertyChangeMultiplexer; }
namespace com::sun::star::beans { struct PropertyChangeEvent; }
namespace com::sun::star::container { class XIndexAccess; }
namespace com::sun::star::sdbc { class XRowSet; }
namespace com::sun::star::sdb { class XRowsChangeListener; }
namespace com::sun::star::uno { class XComponentContext; }
namespace com::sun::star::util { class XNumberFormatter; }

class CursorWrapper;
class PopupMenu;

bool CompareBookmark(const css::uno::Any& aLeft, const css::uno::Any& aRight);

namespace svxform
{
    class DataColumn;
}

enum class GridRowStatus
{
    Clean,
    Modified,
    Deleted,
    Invalid
};


// DbGridRow, description of rows


class SAL_DLLPUBLIC_RTTI DbGridRow final : public SvRefBase
{
    css::uno::Any  m_aBookmark;        // Bookmark of the row, can be set
    ::std::vector< std::unique_ptr<::svxform::DataColumn> >
                                m_aVariants;
    GridRowStatus               m_eStatus;
    bool                        m_bIsNew;
                                                    // row is no longer valid
                                                    // is removed on the next positioning
public:
    DbGridRow();
    DbGridRow(CursorWrapper* pCur, bool bPaintCursor);
    void SetState(CursorWrapper* pCur, bool bPaintCursor);

    virtual ~DbGridRow() override;

    bool HasField(sal_uInt32 nPos) const { return nPos < m_aVariants.size(); }
    const ::svxform::DataColumn& GetField(sal_uInt32 nPos) const { return *m_aVariants[ nPos ]; }

    void            SetStatus(GridRowStatus _eStat) { m_eStatus = _eStat; }
    GridRowStatus   GetStatus() const               { return m_eStatus; }
    void            SetNew(bool _bNew)              { m_bIsNew = _bNew; }
    bool            IsNew() const                   { return m_bIsNew; }

    const css::uno::Any& GetBookmark() const { return m_aBookmark; }

    bool    IsValid() const { return m_eStatus == GridRowStatus::Clean || m_eStatus == GridRowStatus::Modified; }
    bool    IsModified() const { return m_eStatus == GridRowStatus::Modified; }
};

typedef tools::SvRef<DbGridRow> DbGridRowRef;


// DbGridControl

class DbGridColumn;

class FmGridListener
{
public:
    virtual void selectionChanged() = 0;
    virtual void columnChanged() = 0;

protected:
    ~FmGridListener() {}
};

#define GRID_COLUMN_NOT_FOUND   SAL_MAX_UINT16


// InitWindowFacet, describing which aspect of a column's Window to (re-)initialize

enum class InitWindowFacet
{
    Font        = 0x01,
    Foreground  = 0x02,
    Background  = 0x04,
    WritingMode = 0x08,
    All         = 0x0F
};
namespace o3tl
{
    template<> struct typed_flags<InitWindowFacet> : is_typed_flags<InitWindowFacet, 0x0f> {};
}


// these options are or'ed and indicate, which of the single
// features can be released, default is readonly which means 0
enum class DbGridControlOptions
{
    Readonly    = 0x00,
    Insert      = 0x01,
    Update      = 0x02,
    Delete      = 0x04
};
namespace o3tl
{
    template<> struct typed_flags<DbGridControlOptions> : is_typed_flags<DbGridControlOptions, 0x07> {};
}

//  StatusIds for Controls of the Bar
//  important for invalidation
enum class DbGridControlNavigationBarState
{
    NONE,
    Text,
    Absolute,
    Of,
    Count,
    First,
    Next,
    Prev,
    Last,
    New,
    Undo // related to SID_FM_RECORD_UNDO
};

class FmXGridSourcePropListener;
class DisposeListenerGridBridge;

// NavigationBar
class NavigationBar final : public InterimItemWindow
{
    class AbsolutePos final : public RecordItemWindowBase
    {
    public:
        AbsolutePos(std::unique_ptr<weld::Entry> xEntry, NavigationBar* pBar);

        virtual bool DoKeyInput(const KeyEvent& rEvt) override;
        virtual void PositionFired(sal_Int64 nRecord) override;

        weld::Entry* GetWidget() { return m_xWidget.get(); }
    private:
        VclPtr<NavigationBar> m_xParent;
    };

    friend class NavigationBar::AbsolutePos;

    //  additional controls
    std::unique_ptr<weld::Label> m_xRecordText;
    std::unique_ptr<AbsolutePos> m_xAbsolute;         // absolute positioning
    std::unique_ptr<weld::Label> m_xRecordOf;
    std::unique_ptr<weld::Label> m_xRecordCount;

    std::unique_ptr<weld::Button> m_xFirstBtn;        // Button for 'go to the first record'
    std::unique_ptr<weld::Button> m_xPrevBtn;         // Button for 'go to the previous record'
    std::unique_ptr<weld::Button> m_xNextBtn;         // Button for 'go to the next record'
    std::unique_ptr<weld::Button> m_xLastBtn;         // Button for 'go to the last record'
    std::unique_ptr<weld::Button> m_xNewBtn;          // Button for 'go to a new record'

    std::shared_ptr<weld::ButtonPressRepeater> m_xPrevRepeater;
    std::shared_ptr<weld::ButtonPressRepeater> m_xNextRepeater;

    sal_Int32            m_nCurrentPos;

    bool                 m_bPositioning;     // protect PositionDataSource against recursion

public:
    NavigationBar(vcl::Window* pParent);
    virtual ~NavigationBar() override;
    virtual void dispose() override;

    // Status methods for Controls
    void InvalidateAll(sal_Int32 nCurrentPos, bool bAll = false);
    void InvalidateState(DbGridControlNavigationBarState nWhich) {SetState(nWhich);}
    void SetState(DbGridControlNavigationBarState nWhich);
    bool GetState(DbGridControlNavigationBarState nWhich) const;
    sal_uInt16 ArrangeControls();

private:

    DECL_LINK(OnClick, weld::Button&, void);

    void PositionDataSource(sal_Int32 nRecord);
};

class SVXCORE_DLLPUBLIC DbGridControl : public svt::EditBrowseBox
{
    friend class FmXGridSourcePropListener;
    friend class GridFieldValueListener;
    friend class DisposeListenerGridBridge;

public:

    friend class NavigationBar;

private:
    Link<DbGridControlNavigationBarState,int>    m_aMasterStateProvider;
    Link<DbGridControlNavigationBarState,bool>   m_aMasterSlotExecutor;

    css::uno::Reference< css::util::XNumberFormatter >    m_xFormatter;
    css::uno::Reference< css::uno::XComponentContext >    m_xContext;

    std::vector< std::unique_ptr<DbGridColumn> > m_aColumns;         // Column description
    VclPtr<NavigationBar>   m_aBar;
    DbGridRowRef    m_xDataRow;         // Row which can be modified
                                        // comes from the data cursor
    DbGridRowRef    m_xSeekRow,         // Row to which the iterator can set
                                        // comes from the data cursor

                    m_xEmptyRow;        // record set to insert

    ImplSVEvent *   m_nAsynAdjustEvent;

    // if we modify the row for the new record, we automatically insert a "new new row".
    // But if somebody else inserts a new record into the data source, we have to do the same.
    // For that reason we have to listen to some properties of our data source.
    rtl::Reference<::comphelper::OPropertyChangeMultiplexer>  m_pDataSourcePropMultiplexer;
    FmXGridSourcePropListener*                      m_pDataSourcePropListener;
    css::uno::Reference< css::sdb::XRowsChangeListener>
                                                    m_xRowSetListener; // get notification when rows were changed

    void*                                           m_pFieldListeners;
        // property listeners for field values

    std::unique_ptr<DisposeListenerGridBridge>      m_pCursorDisposeListener;
        // need to know about the disposing of the seek cursor
        // construct analogous to the data source proplistener/multiplexer above :
        // DisposeListenerGridBridge is a bridge from FmXDisposeListener which I don't want to be derived from

    FmGridListener*                                 m_pGridListener;

protected:
    std::unique_ptr<CursorWrapper> m_pDataCursor;      // Cursor for Updates
    std::unique_ptr<CursorWrapper> m_pSeekCursor;      // Cursor for Seeking

private:
    // iteration variables
    DbGridRowRef        m_xCurrentRow;
    DbGridRowRef        m_xPaintRow;        // Row to be displayed
    sal_Int32           m_nSeekPos;         // Position of the SeekCursor
    sal_Int32           m_nTotalCount;      // is set when the data cursor finished counting the
                                            // records. Initial value is -1
    osl::Mutex          m_aDestructionSafety;
    osl::Mutex          m_aAdjustSafety;

    css::util::Date
                        m_aNullDate;        // NullDate of the Numberformatter;

    BrowserMode         m_nMode;
    sal_Int32           m_nCurrentPos;      // Current position;
    ImplSVEvent *       m_nDeleteEvent;     // EventId for asynchronous deletion of rows
    DbGridControlOptions m_nOptions;        // What is the able to do (Insert, Update, Delete)
                                            // default readonly
    DbGridControlOptions m_nOptionMask;     // the mask of options to be enabled in setDataSource
                                            // (with respect to the data source capabilities)
                                            // defaults to (insert | update | delete)
    sal_uInt16          m_nLastColId;
    sal_Int32           m_nLastRowId;

    bool                m_bDesignMode : 1;      // default = sal_False
    bool                m_bRecordCountFinal : 1;
    bool                m_bNavigationBar      : 1;

    bool                m_bSynchDisplay : 1;
    bool                m_bHandle : 1;
    bool                m_bFilterMode : 1;
    bool                m_bWantDestruction : 1;
    bool                m_bPendingAdjustRows : 1;   // if an async adjust is pending, is it for AdjustRows or AdjustDataSource ?
    bool                m_bHideScrollbars : 1;

protected:
    bool                m_bUpdating : 1;            // are any updates being executed right now?

protected:
    virtual bool SeekRow(sal_Int32 nRow) override;
    virtual void VisibleRowsChanged( sal_Int32 nNewTopRow, sal_uInt16 nNumRows) override;
    virtual void PaintCell(OutputDevice& rDev, const tools::Rectangle& rRect, sal_uInt16 nColId) const override;
    virtual RowStatus GetRowStatus(sal_Int32 nRow) const override;
    virtual bool CursorMoving(sal_Int32 nNewRow, sal_uInt16 nNewCol) override;
    virtual void CursorMoved() override;
    virtual void ArrangeControls(sal_uInt16& nX, sal_uInt16 nY) override;
    virtual sal_uInt32 GetTotalCellWidth(sal_Int32 nRow, sal_uInt16 nColId) override;
    virtual void Command(const CommandEvent& rEvt) override;
    virtual bool PreNotify(NotifyEvent& rEvt) override;
    virtual void KeyInput(const KeyEvent& rEvt) override;
    virtual void StateChanged( StateChangedType nType ) override;
    virtual void DataChanged( const DataChangedEvent& rDCEvt ) override;
    virtual void Select() override;

    virtual ::svt::CellController* GetController(sal_Int32 nRow, sal_uInt16 nCol) override;

    virtual void CellModified() override;
    virtual bool SaveModified() override;
    virtual bool IsModified() const override;

    virtual sal_uInt16 AppendColumn(const OUString& rName, sal_uInt16 nWidth, sal_uInt16 nPos = HEADERBAR_APPEND, sal_uInt16 nId = sal_uInt16(-1)) override;
    void RemoveColumn(sal_uInt16 nId);
    std::unique_ptr<DbGridColumn> CreateColumn(sal_uInt16 nId);
    virtual void ColumnMoved(sal_uInt16 nId) override;
    virtual bool SaveRow() override;
    virtual bool IsTabAllowed(bool bForward) const override;

    virtual void    HideColumn(sal_uInt16 nId);
    virtual void    ShowColumn(sal_uInt16 nId);

    virtual void PreExecuteRowContextMenu(sal_uInt16 nRow, PopupMenu& rMenu);
    virtual void PostExecuteRowContextMenu(sal_uInt16 nRow, const PopupMenu& rMenu, sal_uInt16 nExecutionResult);

    void DataSourcePropertyChanged(const css::beans::PropertyChangeEvent& evt);

    void FieldValueChanged(sal_uInt16 _nId);
    void FieldListenerDisposing(sal_uInt16 _nId);

    void disposing(sal_uInt16 _nId);

    // own overridables
    virtual void onRowChange();
    virtual void onColumnChange();

    // DragSourceHelper overridables
    virtual void StartDrag( sal_Int8 nAction, const Point& rPosPixel ) override;

    void    executeRowContextMenu( sal_Int32 _nRow, const Point& _rPreferredPos );

public:
    DbGridControl(
        css::uno::Reference< css::uno::XComponentContext > const & _rxContext,
        vcl::Window* pParent,
        WinBits nBits);

    virtual ~DbGridControl() override;
    virtual void dispose() override;

    virtual void Init() override;
    virtual void InitColumnsByFields(const css::uno::Reference< css::container::XIndexAccess >& xFields) = 0;
    virtual void RemoveRows() override;

    virtual OUString  GetCellText(sal_Int32 _nRow, sal_uInt16 _nColId) const override;

    void RemoveRows(bool bNewCursor);

    const css::uno::Reference< css::util::XNumberFormatter >& getNumberFormatter() const {return m_xFormatter;}

    // the data source
    // the options can restrict but not extend the update abilities
    void setDataSource(const css::uno::Reference< css::sdbc::XRowSet >& rCursor,
        DbGridControlOptions nOpts = DbGridControlOptions::Insert | DbGridControlOptions::Update | DbGridControlOptions::Delete);
    virtual void Dispatch(sal_uInt16 nId) override;

    CursorWrapper* getDataSource() const {return m_pDataCursor.get();}
    const std::vector< std::unique_ptr<DbGridColumn> >& GetColumns() const {return m_aColumns;}

    void EnableHandle(bool bEnable);
    bool HasHandle() const {return m_bHandle;}
    void InsertHandleColumn();

    // which position does the column with the id in the View have, the handle column doesn't count
    sal_uInt16 GetViewColumnPos( sal_uInt16 nId ) const { sal_uInt16 nPos = GetColumnPos(nId); return (nPos==BROWSER_INVALIDID) ? GRID_COLUMN_NOT_FOUND : nPos-1; }

    // which position does the column with the id in m_aColumns have, that means the css::sdbcx::Container
    // returned from the GetColumns (may be different from the position returned by GetViewColumnPos
    // if there are hidden columns)
    sal_uInt16 GetModelColumnPos( sal_uInt16 nId ) const;

    // the number of columns in the model
    sal_uInt16 GetViewColCount() const { return ColCount() - 1; }
    sal_uInt16 GetModelColCount() const { return static_cast<sal_uInt16>(m_aColumns.size()); }
    // reverse to GetViewColumnPos: Id of position, the first non-handle column has position 0
    sal_uInt16 GetColumnIdFromViewPos( sal_uInt16 nPos ) const { return GetColumnId(nPos + 1); }
    sal_uInt16 GetColumnIdFromModelPos( sal_uInt16 nPos ) const;

    virtual void SetDesignMode(bool bMode);
    bool IsDesignMode() const {return m_bDesignMode;}
    bool IsOpen() const {return m_pSeekCursor != nullptr;}

    void SetFilterMode(bool bMode);
    bool IsFilterMode() const {return m_bFilterMode;}
    bool IsFilterRow(sal_Int32 nRow) const {return m_bFilterMode && nRow == 0;}

    void EnableNavigationBar(bool bEnable);
    bool HasNavigationBar() const {return m_bNavigationBar;}

    DbGridControlOptions GetOptions() const {return m_nOptions;}
    NavigationBar& GetNavigationBar() {return *m_aBar;}
    DbGridControlOptions SetOptions(DbGridControlOptions nOpt);
        // The new options are interpreted with respect to the current data source. If it is unable
        // to update, to insert or to restore, the according options are ignored. If the grid isn't
        // connected to a data source, all options except OPT_READONLY are ignored.

    const css::util::Date&   getNullDate() const {return m_aNullDate;}

    // positioning
    void MoveToPosition(sal_uInt32 nPos);
    void MoveToFirst();
    void MoveToNext();
    void MoveToPrev();
    void MoveToLast();
    void AppendNew();

    // adjustment of the cursors in case the data cursor has been
    // moved from the outside.
    // the flag indicates if an adjustment of the row count should be
    // done as well
    void AdjustDataSource(bool bFull = false);
    void Undo();

    virtual void BeginCursorAction();
    virtual void EndCursorAction();

    // is the current line being updated
    bool IsUpdating() const {return m_bUpdating;}

    void RowRemoved( sal_Int32 nRow, sal_Int32 nNumRows = 1, bool bDoPaint = true );
    void RowInserted( sal_Int32 nRow, sal_Int32 nNumRows = 1, bool bDoPaint = true );
    void RowModified( sal_Int32 nRow );

    void resetCurrentRow();

    bool getDisplaySynchron() const { return m_bSynchDisplay; }
    void setDisplaySynchron(bool bSync);
        // when set to sal_False, the display is no longer in sync with the current cursor position
        // (means that in AdjustDataSource we are jumping to a row not belonging to CursorPosition)
        // when using this, you should know what you are doing, because for example entering data
        // in a row in the display that is not in sync with the position of the cursor can be very critical

    const DbGridRowRef& GetCurrentRow() const {return m_xCurrentRow;}

    void SetStateProvider(const Link<DbGridControlNavigationBarState,int>& rProvider) { m_aMasterStateProvider = rProvider; }
        // if this link is set the given provider will be asked for the state of my items.
        // the return values are interpreted as follows :
        // <0 -> not specified (use default mechanism to determine the state)
        // ==0 -> the item is disabled
        // >0 -> the item is enabled
    void SetSlotExecutor(const Link<DbGridControlNavigationBarState,bool>& rExecutor) { m_aMasterSlotExecutor = rExecutor; }
        // analogous : if this link is set, all nav-bar slots will be routed through it when executed
        // if the handler returns nonzero, no further handling of the slot occurs

    void EnablePermanentCursor(bool bEnable);
    bool IsPermanentCursorEnabled() const;

    void        ForceHideScrollbars();

    const css::uno::Reference< css::uno::XComponentContext >&
        getContext() const { return m_xContext; }

    bool    canCopyCellText(sal_Int32 _nRow, sal_uInt16 _nColId);
    void        copyCellText(sal_Int32 _nRow, sal_uInt16 _nColId);

    // select in listener handling
    void                        setGridListener( FmGridListener* _pListener ) { m_pGridListener = _pListener; }

    // helper class to grant access to selected methods from within the DbCellControl class
    struct GrantControlAccess final
    {
        friend class DbCellControl;
        friend class RowSetEventListener;
        GrantControlAccess() { }
    };

    void refreshController(sal_uInt16 _nColId, GrantControlAccess _aAccess);

    CursorWrapper* GetSeekCursor(GrantControlAccess /*_aAccess*/) const    { return m_pSeekCursor.get(); }
    const DbGridRowRef& GetSeekRow(GrantControlAccess /*_aAccess*/) const  { return m_xSeekRow;    }
    void  SetSeekPos(sal_Int32 nPos,GrantControlAccess /*_aAccess*/) {m_nSeekPos = nPos;}

    virtual sal_Int32 GetAccessibleControlCount() const override;

    virtual css::uno::Reference<
        css::accessibility::XAccessible >
    CreateAccessibleControl( sal_Int32 _nIndex ) override;

    // IAccessibleTableProvider
    virtual css::uno::Reference<
        css::accessibility::XAccessible >
    CreateAccessibleCell( sal_Int32 nRow, sal_uInt16 nColumnId ) override;

protected:
    void RecalcRows(sal_Int32 nNewTopRow, sal_uInt16 nLinesOnScreen, bool bUpdateCursor);
    bool SeekCursor(sal_Int32 nRow, bool bAbsolute = false);
    void RemoveColumns();       // cleaning of own structures
    void AdjustRows();
    sal_Int32 AlignSeekCursor();
    bool SetCurrent(sal_Int32 nNewRow);

    OUString GetCurrentRowCellText(DbGridColumn const * pCol,const DbGridRowRef& _rRow) const;
    virtual void DeleteSelectedRows();
    static bool IsValid(const DbGridRowRef& _xRow) { return _xRow.is() && _xRow->IsValid(); }

    // row which is currently being appended
    bool IsCurrentAppending() const;

    // empty row for insertion
    bool IsInsertionRow(sal_Int32 nRow) const;

    void  SetSeekPos(sal_Int32 nPos) {m_nSeekPos = nPos;}
    sal_Int32 GetCurrentPos() const {return m_nCurrentPos;}
    sal_Int32 GetSeekPos() const {return m_nSeekPos;}
    sal_Int32 GetTotalCount() const {return m_nTotalCount;}

    const DbGridRowRef& GetEmptyRow() const { return m_xEmptyRow;   }
    const DbGridRowRef& GetSeekRow() const  { return m_xSeekRow;    }
    const DbGridRowRef& GetPaintRow() const { return m_xPaintRow;   }

    void ConnectToFields();
    void DisconnectFromFields();

    void implAdjustInSolarThread(bool _bRows);
        // calls AdjustRows or AdjustDataSource, synchron if the caller is running in the solar thread, else asynchron

protected:
    void ImplInitWindow( const InitWindowFacet _eInitWhat );
    DECL_LINK(OnDelete, void*, void);

    DECL_LINK(OnAsyncAdjust, void*, void);
        // if the param is != NULL, AdjustRows will be called, else AdjustDataSource

private:
    using BrowseBox::InsertHandleColumn;
};

#endif // INCLUDED_SVX_GRIDCTRL_HXX

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */