Initialise DC only when needed and deinitilise it properly before, fixes #10543:...

[wxWidgets.git] / include / wx / generic / dataview.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/generic/dataview.h
// Purpose:     wxDataViewCtrl generic implementation header
// Author:      Robert Roebling
// Modified By: Bo Yang
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef __GENERICDATAVIEWCTRLH__
#define __GENERICDATAVIEWCTRLH__

#include "wx/defs.h"
#include "wx/object.h"
#include "wx/list.h"
#include "wx/control.h"
#include "wx/scrolwin.h"
#include "wx/icon.h"

// ---------------------------------------------------------
// classes
// ---------------------------------------------------------

class WXDLLIMPEXP_FWD_ADV wxDataViewCtrl;
class WXDLLIMPEXP_FWD_ADV wxDataViewMainWindow;
class WXDLLIMPEXP_FWD_ADV wxDataViewHeaderWindow;

// ---------------------------------------------------------
// wxDataViewRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewRenderer: public wxDataViewRendererBase
{
public:
    wxDataViewRenderer( const wxString &varianttype,
                        wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                        int align = wxDVR_DEFAULT_ALIGNMENT );
    virtual ~wxDataViewRenderer();

    virtual bool Render( wxRect cell, wxDC *dc, int state ) = 0;
    virtual wxSize GetSize() const = 0;

    virtual void SetAlignment( int align );
    virtual int GetAlignment() const;

    virtual void SetMode( wxDataViewCellMode mode )
        { m_mode=mode; }
    virtual wxDataViewCellMode GetMode() const
        { return m_mode; }

    virtual bool Activate( wxRect WXUNUSED(cell),
                           wxDataViewModel *WXUNUSED(model),
                           const wxDataViewItem & WXUNUSED(item),
                           unsigned int WXUNUSED(col) )
                           { return false; }

    virtual bool LeftClick( wxPoint WXUNUSED(cursor),
                            wxRect WXUNUSED(cell),
                            wxDataViewModel *WXUNUSED(model),
                            const wxDataViewItem & WXUNUSED(item),
                            unsigned int WXUNUSED(col) )
                            { return false; }
    virtual bool RightClick( wxPoint WXUNUSED(cursor),
                             wxRect WXUNUSED(cell),
                             wxDataViewModel *WXUNUSED(model),
                             const wxDataViewItem & WXUNUSED(item),
                             unsigned int WXUNUSED(col) )
                             { return false; }
    virtual bool StartDrag( wxPoint WXUNUSED(cursor),
                            wxRect WXUNUSED(cell),
                            wxDataViewModel *WXUNUSED(model),
                            const wxDataViewItem & WXUNUSED(item),
                            unsigned int WXUNUSED(col) )
                            { return false; }

    // Create DC on request
    virtual wxDC *GetDC();

    void SetHasAttr( bool set )  { m_hasAttr = set; }
    void SetAttr( const wxDataViewItemAttr &attr ) { m_attr = attr; }
    bool GetWantsAttr() const { return m_wantsAttr; }

    // implementation
    int CalculateAlignment() const;

private:
    wxDC                        *m_dc;
    int                          m_align;
    wxDataViewCellMode           m_mode;

protected:
    bool                         m_wantsAttr;
    bool                         m_hasAttr;
    wxDataViewItemAttr           m_attr;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewRenderer)
};

// ---------------------------------------------------------
// wxDataViewCustomRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewCustomRenderer: public wxDataViewRenderer
{
public:
    wxDataViewCustomRenderer( const wxString &varianttype = wxT("string"),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT );

    void RenderText( const wxString &text, int xoffset, wxRect cell, wxDC *dc, int state );

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewCustomRenderer)
};


// ---------------------------------------------------------
// wxDataViewTextRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewTextRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewTextRenderer( const wxString &varianttype = wxT("string"),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                            int align = wxDVR_DEFAULT_ALIGNMENT );

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant &value ) const;

    bool Render( wxRect cell, wxDC *dc, int state );
    wxSize GetSize() const;

    // in-place editing
    virtual bool HasEditorCtrl() const;
    virtual wxControl* CreateEditorCtrl( wxWindow *parent, wxRect labelRect, 
                                         const wxVariant &value );
    virtual bool GetValueFromEditorCtrl( wxControl* editor, wxVariant &value );

protected:
    wxString   m_text;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewTextRenderer)
};

// ---------------------------------------------------------
// wxDataViewTextRendererAttr
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewTextRendererAttr: public wxDataViewTextRenderer
{
public:
    wxDataViewTextRendererAttr( const wxString &varianttype = wxT("string"),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                            int align = wxDVR_DEFAULT_ALIGNMENT );

    bool Render( wxRect cell, wxDC *dc, int state );

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewTextRendererAttr)
};

// ---------------------------------------------------------
// wxDataViewBitmapRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewBitmapRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewBitmapRenderer( const wxString &varianttype = wxT("wxBitmap"),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT );

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant &value ) const;

    bool Render( wxRect cell, wxDC *dc, int state );
    wxSize GetSize() const;

private:
    wxIcon m_icon;
    wxBitmap m_bitmap;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewBitmapRenderer)
};

// ---------------------------------------------------------
// wxDataViewToggleRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewToggleRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewToggleRenderer( const wxString &varianttype = wxT("bool"),
                              wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                              int align = wxDVR_DEFAULT_ALIGNMENT );

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant &value ) const;

    bool Render( wxRect cell, wxDC *dc, int state );
    bool Activate( wxRect cell, wxDataViewModel *model, const wxDataViewItem & item,
                            unsigned int col );
    wxSize GetSize() const;

private:
    bool    m_toggle;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewToggleRenderer)
};

// ---------------------------------------------------------
// wxDataViewProgressRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewProgressRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewProgressRenderer( const wxString &label = wxEmptyString,
                                const wxString &varianttype = wxT("long"),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT );
    virtual ~wxDataViewProgressRenderer();

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant& value ) const;

    virtual bool Render( wxRect cell, wxDC *dc, int state );
    virtual wxSize GetSize() const;

private:
    wxString    m_label;
    int         m_value;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewProgressRenderer)
};

// ---------------------------------------------------------
// wxDataViewIconTextRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewIconTextRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewIconTextRenderer( const wxString &varianttype = wxT("wxDataViewIconText"),
                                wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                                int align = wxDVR_DEFAULT_ALIGNMENT );
    virtual ~wxDataViewIconTextRenderer();

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant &value ) const;

    virtual bool Render( wxRect cell, wxDC *dc, int state );
    virtual wxSize GetSize() const;

    virtual bool HasEditorCtrl() { return true; }
    virtual wxControl* CreateEditorCtrl( wxWindow *parent, wxRect labelRect, 
                                         const wxVariant &value );
    virtual bool GetValueFromEditorCtrl( wxControl* editor, wxVariant &value );

private:
    wxDataViewIconText   m_value;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewIconTextRenderer)
};

// ---------------------------------------------------------
// wxDataViewDateRenderer
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewDateRenderer: public wxDataViewCustomRenderer
{
public:
    wxDataViewDateRenderer( const wxString &varianttype = wxT("datetime"),
                            wxDataViewCellMode mode = wxDATAVIEW_CELL_ACTIVATABLE,
                            int align = wxDVR_DEFAULT_ALIGNMENT );

    bool SetValue( const wxVariant &value );
    bool GetValue( wxVariant& value ) const;

    virtual bool Render( wxRect cell, wxDC *dc, int state );
    virtual wxSize GetSize() const;
    virtual bool Activate( wxRect cell,
                           wxDataViewModel *model, 
                           const wxDataViewItem& item, 
                           unsigned int col );

private:
    wxDateTime    m_date;

protected:
    DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewDateRenderer)
};

// ---------------------------------------------------------
// wxDataViewColumn
// ---------------------------------------------------------

class WXDLLIMPEXP_ADV wxDataViewColumn : public wxDataViewColumnBase
{
public:
    wxDataViewColumn(const wxString& title,
                     wxDataViewRenderer *renderer,
                     unsigned int model_column,
                     int width = wxDVC_DEFAULT_WIDTH,
                     wxAlignment align = wxALIGN_CENTER,
                     int flags = wxDATAVIEW_COL_RESIZABLE)
        : wxDataViewColumnBase(renderer, model_column),
          m_title(title)
    {
        Init(width, align, flags);
    }

    wxDataViewColumn(const wxBitmap& bitmap,
                     wxDataViewRenderer *renderer,
                     unsigned int model_column,
                     int width = wxDVC_DEFAULT_WIDTH,
                     wxAlignment align = wxALIGN_CENTER,
                     int flags = wxDATAVIEW_COL_RESIZABLE)
        : wxDataViewColumnBase(bitmap, renderer, model_column)
    {
        Init(width, align, flags);
    }

    // implement wxHeaderColumnBase methods
    virtual void SetTitle(const wxString& title) { m_title = title; }
    virtual wxString GetTitle() const { return m_title; }

    virtual void SetWidth(int width) { m_width = width; }
    virtual int GetWidth() const { return m_width; }

    virtual void SetMinWidth(int minWidth) { m_minWidth = minWidth; }
    virtual int GetMinWidth() const { return m_minWidth; }

    virtual void SetAlignment(wxAlignment align) { m_align = align; }
    virtual wxAlignment GetAlignment() const { return m_align; }

    virtual void SetFlags(int flags) { m_flags = flags; }
    virtual int GetFlags() const { return m_flags; }

    virtual void SetAsSortKey(bool sort = true) { m_sort = sort; }
    virtual bool IsSortKey() const { return m_sort; }

    virtual void SetSortOrder(bool ascending) { m_sortAscending = ascending; }
    virtual bool IsSortOrderAscending() const { return m_sortAscending; }

private:
    // common part of all ctors
    void Init(int width, wxAlignment align, int flags)
    {
        m_width = width == wxCOL_WIDTH_DEFAULT ? wxDVC_DEFAULT_WIDTH : width;
        m_minWidth = 0;
        m_align = align;
        m_flags = flags;
        m_sort = false;
        m_sortAscending = true;
    }

    wxString m_title;
    int m_width,
        m_minWidth;
    wxAlignment m_align;
    int m_flags;
    bool m_sort,
         m_sortAscending;

    friend class wxDataViewHeaderWindowBase;
    friend class wxDataViewHeaderWindow;
    friend class wxDataViewHeaderWindowMSW;
};

// ---------------------------------------------------------
// wxDataViewCtrl
// ---------------------------------------------------------

WX_DECLARE_LIST_WITH_DECL(wxDataViewColumn, wxDataViewColumnList,
                          class WXDLLIMPEXP_ADV);

class WXDLLIMPEXP_ADV wxDataViewCtrl : public wxDataViewCtrlBase,
                                       public wxScrollHelper
{
    friend class wxDataViewMainWindow;
    friend class wxDataViewHeaderWindowBase;
    friend class wxDataViewHeaderWindow;
    friend class wxDataViewHeaderWindowMSW;
    friend class wxDataViewColumn;

public:
    wxDataViewCtrl() : wxScrollHelper(this)
    {
        Init();
    }

    wxDataViewCtrl( wxWindow *parent, wxWindowID id,
           const wxPoint& pos = wxDefaultPosition,
           const wxSize& size = wxDefaultSize, long style = 0,
           const wxValidator& validator = wxDefaultValidator )
             : wxScrollHelper(this)
    {
        Create(parent, id, pos, size, style, validator );
    }

    virtual ~wxDataViewCtrl();

    void Init();

    bool Create(wxWindow *parent, wxWindowID id,
                const wxPoint& pos = wxDefaultPosition,
                const wxSize& size = wxDefaultSize, long style = 0,
                const wxValidator& validator = wxDefaultValidator );

    virtual bool AssociateModel( wxDataViewModel *model );

    virtual bool AppendColumn( wxDataViewColumn *col );
    virtual bool PrependColumn( wxDataViewColumn *col );
    virtual bool InsertColumn( unsigned int pos, wxDataViewColumn *col );

    virtual void DoSetExpanderColumn();
    virtual void DoSetIndent();

    virtual unsigned int GetColumnCount() const;
    virtual wxDataViewColumn* GetColumn( unsigned int pos ) const;
    virtual bool DeleteColumn( wxDataViewColumn *column );
    virtual bool ClearColumns();
    virtual int GetColumnPosition( const wxDataViewColumn *column ) const;

    virtual wxDataViewColumn *GetSortingColumn() const;

    virtual wxDataViewItem GetSelection() const;
    virtual int GetSelections( wxDataViewItemArray & sel ) const;
    virtual void SetSelections( const wxDataViewItemArray & sel );
    virtual void Select( const wxDataViewItem & item );
    virtual void Unselect( const wxDataViewItem & item );
    virtual bool IsSelected( const wxDataViewItem & item ) const;

    virtual void SelectAll();
    virtual void UnselectAll();

    virtual void EnsureVisible( const wxDataViewItem & item,
                                const wxDataViewColumn *column = NULL );
    virtual void HitTest( const wxPoint & point, wxDataViewItem & item, 
                          wxDataViewColumn* &column ) const;
    virtual wxRect GetItemRect( const wxDataViewItem & item, 
                                const wxDataViewColumn *column = NULL ) const;

    virtual void Expand( const wxDataViewItem & item );
    virtual void Collapse( const wxDataViewItem & item );
    virtual bool IsExpanded( const wxDataViewItem & item ) const;

    virtual void SetFocus();

#if wxUSE_DRAG_AND_DROP
    virtual bool EnableDragSource( const wxDataFormat &format );
    virtual bool EnableDropTarget( const wxDataFormat &format );
#endif // wxUSE_DRAG_AND_DROP

    virtual wxBorder GetDefaultBorder() const;

protected:
    virtual int GetSelections( wxArrayInt & sel ) const;
    virtual void SetSelections( const wxArrayInt & sel );
    virtual void Select( int row );
    virtual void Unselect( int row );
    virtual bool IsSelected( int row ) const;
    virtual void SelectRange( int from, int to );
    virtual void UnselectRange( int from, int to );

    virtual void EnsureVisible( int row, int column );

    virtual wxDataViewItem GetItemByRow( unsigned int row ) const;
    virtual int GetRowByItem( const wxDataViewItem & item ) const;

    int GetSortingColumnIndex() const { return m_sortingColumnIdx; }
    void SetSortingColumnIndex(int idx) { m_sortingColumnIdx = idx; }

public:     // utility functions not part of the API

    // returns the "best" width for the idx-th column
    unsigned int GetBestColumnWidth(int WXUNUSED(idx)) const
    {
        return GetClientSize().GetWidth() / GetColumnCount();
    }

    // called by header window after reorder
    void ColumnMoved( wxDataViewColumn* col, unsigned int new_pos );

    // update the display after a change to an individual column
    void OnColumnChange(unsigned int idx);

    // update after a change to the number of columns
    void OnColumnsCountChanged();

    wxWindow *GetMainWindow() { return (wxWindow*) m_clientArea; }

    // return the index of the given column in m_cols
    int GetColumnIndex(const wxDataViewColumn *column) const;

    // return the column displayed at the given position in the control
    wxDataViewColumn *GetColumnAt(unsigned int pos) const;

private:
    wxDataViewColumnList      m_cols;
    wxDataViewModelNotifier  *m_notifier;
    wxDataViewMainWindow     *m_clientArea;
    wxDataViewHeaderWindow   *m_headerArea;

    // the index of the column currently used for sorting or -1
    int m_sortingColumnIdx;

private:
    void OnSize( wxSizeEvent &event );
    virtual wxSize GetSizeAvailableForScrollTarget(const wxSize& size);

    // we need to return a special WM_GETDLGCODE value to process just the
    // arrows but let the other navigation characters through
#ifdef __WXMSW__
    virtual WXLRESULT MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
#endif // __WXMSW__

    WX_FORWARD_TO_SCROLL_HELPER()

private:
    DECLARE_DYNAMIC_CLASS(wxDataViewCtrl)
    wxDECLARE_NO_COPY_CLASS(wxDataViewCtrl);
    DECLARE_EVENT_TABLE()
};


#endif // __GENERICDATAVIEWCTRLH__