Don't cache incorrect length in wxString::assign(char*, size_t).

[wxWidgets.git] / include / wx / propgrid / manager.h

/////////////////////////////////////////////////////////////////////////////
// Name:        wx/propgrid/manager.h
// Purpose:     wxPropertyGridManager
// Author:      Jaakko Salli
// Modified by:
// Created:     2005-01-14
// RCS-ID:      $Id$
// Copyright:   (c) Jaakko Salli
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_PROPGRID_MANAGER_H_
#define _WX_PROPGRID_MANAGER_H_

#include "wx/defs.h"

#if wxUSE_PROPGRID

#include "wx/propgrid/propgrid.h"

#include "wx/dcclient.h"
#include "wx/scrolwin.h"
#include "wx/toolbar.h"
#include "wx/stattext.h"
#include "wx/button.h"
#include "wx/textctrl.h"
#include "wx/dialog.h"
#include "wx/headerctrl.h"

// -----------------------------------------------------------------------

#ifndef SWIG
extern WXDLLIMPEXP_DATA_PROPGRID(const char) wxPropertyGridManagerNameStr[];
#endif

/** @class wxPropertyGridPage

    Holder of property grid page information. You can subclass this and
    give instance in wxPropertyGridManager::AddPage. It inherits from
    wxEvtHandler and can be used to process events specific to this
    page (id of events will still be same as manager's). If you don't
    want to use it to process all events of the page, you need to
    return false in the derived wxPropertyGridPage::IsHandlingAllEvents.

    Please note that wxPropertyGridPage lacks many non-const property
    manipulation functions found in wxPropertyGridManager. Please use
    parent manager (m_manager member variable) when needed.

    Please note that most member functions are inherited and as such not
    documented on this page. This means you will probably also want to read
    wxPropertyGridInterface class reference.

    @section propgridpage_event_handling Event Handling

    wxPropertyGridPage receives events emitted by its wxPropertyGridManager, but
    only those events that are specific to that page. If
    wxPropertyGridPage::IsHandlingAllEvents returns false, then unhandled
    events are sent to the manager's parent, as usual.

    See @ref propgrid_event_handling "wxPropertyGrid Event Handling"
    for more information.

    @library{wxpropgrid}
    @category{propgrid}
*/
class WXDLLIMPEXP_PROPGRID wxPropertyGridPage : public wxEvtHandler,
                                                public wxPropertyGridInterface,
                                                public wxPropertyGridPageState
{
    friend class wxPropertyGridManager;
    DECLARE_CLASS(wxPropertyGridPage)
public:

    wxPropertyGridPage();
    virtual ~wxPropertyGridPage();

    /** Deletes all properties on page.
    */
    virtual void Clear();

    /**
        Reduces column sizes to minimum possible that contents are still
        visibly (naturally some margin space will be applied as well).

        @return
        Minimum size for the page to still display everything.

        @remarks
        This function only works properly if size of containing grid was
        already fairly large.

        Note that you can also get calculated column widths by calling
        GetColumnWidth() immediately after this function returns.
    */
    wxSize FitColumns();

    /** Returns page index in manager;
    */
    inline int GetIndex() const;

    /** Returns x-coordinate position of splitter on a page.
    */
    int GetSplitterPosition( int col = 0 ) const
        { return GetStatePtr()->DoGetSplitterPosition(col); }

    /** Returns "root property". It does not have name, etc. and it is not
        visible. It is only useful for accessing its children.
    */
    wxPGProperty* GetRoot() const { return GetStatePtr()->DoGetRoot(); }

    /** Return pointer to contained property grid state.
    */
    wxPropertyGridPageState* GetStatePtr()
    {
        return this;
    }

    /** Return pointer to contained property grid state.
    */
    const wxPropertyGridPageState* GetStatePtr() const
    {
        return this;
    }

    /**
        Returns id of the tool bar item that represents this page on
        wxPropertyGridManager's wxToolBar.
    */
    int GetToolId() const
    {
        return m_toolId;
    }

    /** Do any member initialization in this method.
        @remarks
        - Called every time the page is added into a manager.
        - You can add properties to the page here.
    */
    virtual void Init() {}

    /** Return false here to indicate unhandled events should be
        propagated to manager's parent, as normal.
    */
    virtual bool IsHandlingAllEvents() const { return true; }

    /** Called every time page is about to be shown.
        Useful, for instance, creating properties just-in-time.
    */
    virtual void OnShow();

    virtual void RefreshProperty( wxPGProperty* p );

    /** Sets splitter position on page.
        @remarks
        Splitter position cannot exceed grid size, and therefore setting it
        during form creation may fail as initial grid size is often smaller
        than desired splitter position, especially when sizers are being used.
    */
    void SetSplitterPosition( int splitterPos, int col = 0 );

protected:

    /** Propagate to other pages.
    */
    virtual void DoSetSplitterPosition( int pos,
                                        int splitterColumn = 0,
                                        int flags = wxPG_SPLITTER_REFRESH );

    /** Page label (may be referred as name in some parts of documentation).
        Can be set in constructor, or passed in
        wxPropertyGridManager::AddPage(), but *not* in both.
    */
    wxString                m_label;

    //virtual bool ProcessEvent( wxEvent& event );

    wxPropertyGridManager*  m_manager;

    // Toolbar tool id. Note that this is only valid when the tool bar
    // exists.
    int                     m_toolId;

private:
    bool                    m_isDefault; // is this base page object?

    DECLARE_EVENT_TABLE()
};

// -----------------------------------------------------------------------

#if wxUSE_HEADERCTRL
class wxPGHeaderCtrl;
#endif


/** @class wxPropertyGridManager

    wxPropertyGridManager is an efficient multi-page version of wxPropertyGrid,
    which can optionally have toolbar for mode and page selection, and help
    text box.
    Use window flags to select components to include.

    @section propgridmanager_window_styles_ Window Styles

    See @ref propgrid_window_styles.

    @section propgridmanager_event_handling Event Handling

    See @ref propgrid_event_handling "wxPropertyGrid Event Handling"
    for more information.

    @library{wxpropgrid}
    @category{propgrid}
*/
class WXDLLIMPEXP_PROPGRID
    wxPropertyGridManager : public wxPanel, public wxPropertyGridInterface
{
    DECLARE_CLASS(wxPropertyGridManager)
    friend class wxPropertyGridPage;
public:

#ifndef SWIG
    /**
        Two step constructor.
        Call Create when this constructor is called to build up the
        wxPropertyGridManager.
      */
    wxPropertyGridManager();
#endif

    /** The default constructor. The styles to be used are styles valid for
        the wxWindow.
        @see @link wndflags Additional Window Styles@endlink
    */
    wxPropertyGridManager( wxWindow *parent, wxWindowID id = wxID_ANY,
                           const wxPoint& pos = wxDefaultPosition,
                           const wxSize& size = wxDefaultSize,
                           long style = wxPGMAN_DEFAULT_STYLE,
                           const wxString& name = wxPropertyGridManagerNameStr );

    /** Destructor */
    virtual ~wxPropertyGridManager();

    /** Creates new property page. Note that the first page is not created
        automatically.
        @param label
        A label for the page. This may be shown as a toolbar tooltip etc.
        @param bmp
        Bitmap image for toolbar. If wxNullBitmap is used, then a built-in
        default image is used.
        @param pageObj
        wxPropertyGridPage instance. Manager will take ownership of this object.
        NULL indicates that a default page instance should be created.

        @return
        Returns pointer to created page.

        @remarks
        If toolbar is used, it is highly recommended that the pages are
        added when the toolbar is not turned off using window style flag
        switching.
    */
    wxPropertyGridPage* AddPage( const wxString& label = wxEmptyString,
                                 const wxBitmap& bmp = wxPG_NULL_BITMAP,
                                 wxPropertyGridPage* pageObj = NULL )
    {
        return InsertPage(-1, label, bmp, pageObj);
    }

    /** Deletes all all properties and all pages.
    */
    virtual void Clear();

    /** Deletes all properties on given page.
    */
    void ClearPage( int page );

    /** Forces updating the value of property from the editor control.
        Returns true if DoPropertyChanged was actually called.
    */
    bool CommitChangesFromEditor( wxUint32 flags = 0 )
    {
        return m_pPropGrid->CommitChangesFromEditor(flags);
    }

    /**
        Two step creation.
        Whenever the control is created without any parameters, use Create to
        actually create it. Don't access the control's public methods before
        this is called.
        @see @link wndflags Additional Window Styles@endlink
    */
    bool Create( wxWindow *parent, wxWindowID id = wxID_ANY,
                 const wxPoint& pos = wxDefaultPosition,
                 const wxSize& size = wxDefaultSize,
                 long style = wxPGMAN_DEFAULT_STYLE,
                 const wxString& name = wxPropertyGridManagerNameStr );

    /**
        Enables or disables (shows/hides) categories according to parameter
        enable.

        WARNING: Not tested properly, use at your own risk.
    */
    bool EnableCategories( bool enable )
    {
        long fl = m_windowStyle | wxPG_HIDE_CATEGORIES;
        if ( enable ) fl = m_windowStyle & ~(wxPG_HIDE_CATEGORIES);
        SetWindowStyleFlag(fl);
        return true;
    }

    /** Selects page, scrolls and/or expands items to ensure that the
        given item is visible. Returns true if something was actually done.
    */
    bool EnsureVisible( wxPGPropArg id );

    /** Returns number of columns on given page. By the default,
        returns number of columns on current page. */
    int GetColumnCount( int page = -1 ) const;

    /** Returns height of the description text box. */
    int GetDescBoxHeight() const;

    /** Returns pointer to the contained wxPropertyGrid. This does not change
        after wxPropertyGridManager has been created, so you can safely obtain
        pointer once and use it for the entire lifetime of the instance.
    */
    wxPropertyGrid* GetGrid()
    {
        wxASSERT(m_pPropGrid);
        return m_pPropGrid;
    };

    const wxPropertyGrid* GetGrid() const
    {
        wxASSERT(m_pPropGrid);
        return (const wxPropertyGrid*)m_pPropGrid;
    };

    /** Returns iterator class instance.
        @remarks
        Calling this method in wxPropertyGridManager causes run-time assertion
        failure. Please only iterate through individual pages or use
        CreateVIterator().
    */
    wxPropertyGridIterator GetIterator( int flags = wxPG_ITERATE_DEFAULT,
                                        wxPGProperty* firstProp = NULL )
    {
        wxFAIL_MSG( "Please only iterate through individual pages "
                    "or use CreateVIterator()" );
        return wxPropertyGridInterface::GetIterator( flags, firstProp );
    }

    wxPropertyGridConstIterator
    GetIterator(int flags = wxPG_ITERATE_DEFAULT,
                wxPGProperty* firstProp = NULL) const
    {
        wxFAIL_MSG( "Please only iterate through individual pages "
                    " or use CreateVIterator()" );
        return wxPropertyGridInterface::GetIterator( flags, firstProp );
    }

    /** Returns iterator class instance.
        @remarks
        Calling this method in wxPropertyGridManager causes run-time assertion
        failure. Please only iterate through individual pages or use
        CreateVIterator().
    */
    wxPropertyGridIterator GetIterator( int flags, int startPos )
    {
        wxFAIL_MSG( "Please only iterate through individual pages "
                    "or use CreateVIterator()" );

        return wxPropertyGridInterface::GetIterator( flags, startPos );
    }

    wxPropertyGridConstIterator GetIterator( int flags, int startPos ) const
    {
        wxFAIL_MSG( "Please only iterate through individual pages "
                    "or use CreateVIterator()" );
        return wxPropertyGridInterface::GetIterator( flags, startPos );
    }

    /** Similar to GetIterator, but instead returns wxPGVIterator instance,
        which can be useful for forward-iterating through arbitrary property
        containers.
    */
    virtual wxPGVIterator GetVIterator( int flags ) const;

    /** Returns currently selected page.
    */
    wxPropertyGridPage* GetCurrentPage() const
    {
        return GetPage(m_selPage);
    }

    /** Returns page object for given page index.
    */
    wxPropertyGridPage* GetPage( unsigned int ind ) const
    {
        return m_arrPages[ind];
    }

    /** Returns page object for given page name.
    */
    wxPropertyGridPage* GetPage( const wxString& name ) const
    {
        return GetPage(GetPageByName(name));
    }

    /**
        Returns index for a page name.

        If no match is found, wxNOT_FOUND is returned.
     */
    int GetPageByName( const wxString& name ) const;

    /** Returns index for a relevant propertygrid state.

        If no match is found, wxNOT_FOUND is returned.
    */
    int GetPageByState( const wxPropertyGridPageState* pstate ) const;

protected:
    /** Returns wxPropertyGridPageState of given page, current page's for -1.
    */
    virtual wxPropertyGridPageState* GetPageState( int page ) const;

public:
    /** Returns number of managed pages. */
    size_t GetPageCount() const;

    /** Returns name of given page. */
    const wxString& GetPageName( int index ) const;

    /** Returns "root property" of the given page. It does not have name, etc.
        and it is not visible. It is only useful for accessing its children.
    */
    wxPGProperty* GetPageRoot( int index ) const;

    /** Returns index to currently selected page. */
    int GetSelectedPage() const { return m_selPage; }

    /** Alias for GetSelection(). */
    wxPGProperty* GetSelectedProperty() const
    {
        return GetSelection();
    }

    /** Shortcut for GetGrid()->GetSelection(). */
    wxPGProperty* GetSelection() const
    {
        return m_pPropGrid->GetSelection();
    }

    /** Returns a pointer to the toolbar currently associated with the
        wxPropertyGridManager (if any). */
    wxToolBar* GetToolBar() const { return m_pToolbar; }

    /** Creates new property page. Note that the first page is not created
        automatically.
        @param index
        Add to this position. -1 will add as the last item.
        @param label
        A label for the page. This may be shown as a toolbar tooltip etc.
        @param bmp
        Bitmap image for toolbar. If wxNullBitmap is used, then a built-in
        default image is used.
        @param pageObj
        wxPropertyGridPage instance. Manager will take ownership of this object.
        If NULL, default page object is constructed.

        @return
        Returns pointer to created page.
    */
    virtual wxPropertyGridPage* InsertPage( int index,
                                            const wxString& label,
                                            const wxBitmap& bmp = wxNullBitmap,
                                            wxPropertyGridPage* pageObj = NULL );

    /**
        Returns true if any property on any page has been modified by the user.
    */
    bool IsAnyModified() const;

    /**
        Returns true if updating is frozen (ie Freeze() called but not yet
        Thaw() ).
     */
    bool IsFrozen() const { return m_pPropGrid->m_frozen > 0; }

    /**
        Returns true if any property on given page has been modified by the
        user.
     */
    bool IsPageModified( size_t index ) const;

    /**
        Returns true if property is selected. Since selection is page
        based, this function checks every page in the manager.
    */
    virtual bool IsPropertySelected( wxPGPropArg id ) const;

    virtual void Refresh( bool eraseBackground = true,
                          const wxRect* rect = (const wxRect*) NULL );

    /** Removes a page.
        @return
        Returns false if it was not possible to remove page in question.
    */
    virtual bool RemovePage( int page );

    /** Select and displays a given page.

        @param index
            Index of page being seleced. Can be -1 to select nothing.
    */
    void SelectPage( int index );

    /** Select and displays a given page (by label). */
    void SelectPage( const wxString& label )
    {
        int index = GetPageByName(label);
        wxCHECK_RET( index >= 0, wxT("No page with such name") );
        SelectPage( index );
    }

    /** Select and displays a given page. */
    void SelectPage( wxPropertyGridPage* ptr )
    {
        SelectPage( GetPageByState(ptr) );
    }

    /** Select a property. */
    bool SelectProperty( wxPGPropArg id, bool focus = false )
    {
        wxPG_PROP_ARG_CALL_PROLOG_RETVAL(false)
        return p->GetParentState()->DoSelectProperty(p, focus);
    }

    /**
        Sets a column title. Default title for column 0 is "Property",
        and "Value" for column 1.

        @remarks If header is not shown yet, then calling this
                 member function will make it visible.
    */
    void SetColumnTitle( int idx, const wxString& title );

    /**
        Sets number of columns on given page (default is current page).

        @remarks If you use header, then you should always use this
                 member function to set the column count, instead of
                 ones present in wxPropertyGrid or wxPropertyGridPage.
    */
    void SetColumnCount( int colCount, int page = -1 );

    /** Sets label and text in description box.
    */
    void SetDescription( const wxString& label, const wxString& content );

    /** Sets y coordinate of the description box splitter. */
    void SetDescBoxHeight( int ht, bool refresh = true );

    /** Moves splitter as left as possible, while still allowing all
        labels to be shown in full.
        @param subProps
        If false, will still allow sub-properties (ie. properties which
        parent is not root or category) to be cropped.
        @param allPages
        If true, takes labels on all pages into account.
    */
    void SetSplitterLeft( bool subProps = false, bool allPages = true );

    /** Moves splitter as left as possible on an individual page, while still allowing all
        labels to be shown in full.
    */
    void SetPageSplitterLeft(int page, bool subProps = false);

    /**
        Sets splitter position on individual page.

        @remarks If you use header, then you should always use this
                 member function to set the splitter position, instead of
                 ones present in wxPropertyGrid or wxPropertyGridPage.
    */
    void SetPageSplitterPosition( int page, int pos, int column = 0 );

    /**
        Sets splitter position for all pages.

        @remarks Splitter position cannot exceed grid size, and therefore
                 setting it during form creation may fail as initial grid
                 size is often smaller than desired splitter position,
                 especially when sizers are being used.

                 If you use header, then you should always use this
                 member function to set the splitter position, instead of
                 ones present in wxPropertyGrid or wxPropertyGridPage.
    */
    void SetSplitterPosition( int pos, int column = 0 );

#if wxUSE_HEADERCTRL
    /**
        Show or hide the property grid header control. It is hidden
        by the default.

        @remarks Grid may look better if you use wxPG_NO_INTERNAL_BORDER
                 window style when showing a header.
    */
    void ShowHeader(bool show = true);
#endif

protected:

    //
    // Subclassing helpers
    //

    /**
        Creates property grid for the manager. Reimplement in derived class to
        use subclassed wxPropertyGrid. However, if you do this then you
        must also use the two-step construction (ie. default constructor and
        Create() instead of constructor with arguments) when creating the
        manager.
    */
    virtual wxPropertyGrid* CreatePropertyGrid() const;

public:
    virtual void RefreshProperty( wxPGProperty* p );

    //
    // Overridden functions - no documentation required.
    //

    void SetId( wxWindowID winid );

    virtual void Freeze();
    virtual void Thaw();
    virtual void SetExtraStyle ( long exStyle );
    virtual bool SetFont ( const wxFont& font );
    virtual void SetWindowStyleFlag ( long style );
    virtual bool Reparent( wxWindowBase *newParent );

protected:
    virtual wxSize DoGetBestSize() const;

    //
    // Event handlers
    //
    void OnMouseMove( wxMouseEvent &event );
    void OnMouseClick( wxMouseEvent &event );
    void OnMouseUp( wxMouseEvent &event );
    void OnMouseEntry( wxMouseEvent &event );

    void OnPaint( wxPaintEvent &event );

    void OnToolbarClick( wxCommandEvent &event );
    void OnResize( wxSizeEvent& event );
    void OnPropertyGridSelect( wxPropertyGridEvent& event );
    void OnPGColDrag( wxPropertyGridEvent& event );


    wxPropertyGrid* m_pPropGrid;

    wxVector<wxPropertyGridPage*>   m_arrPages;

#if wxUSE_TOOLBAR
    wxToolBar*      m_pToolbar;
#endif
#if wxUSE_HEADERCTRL
    wxPGHeaderCtrl* m_pHeaderCtrl;
#endif
    wxStaticText*   m_pTxtHelpCaption;
    wxStaticText*   m_pTxtHelpContent;

    wxPropertyGridPage*     m_emptyPage;

    wxArrayString   m_columnLabels;

    long            m_iFlags;

    // Selected page index.
    int             m_selPage;

    int             m_width;

    int             m_height;

    int             m_extraHeight;

    int             m_splitterY;

    int             m_splitterHeight;

    int             m_dragOffset;

    wxCursor        m_cursorSizeNS;

    int             m_nextDescBoxSize;

    // Toolbar tool ids for categorized and alphabetic mode selectors.
    int             m_categorizedModeToolId;
    int             m_alphabeticModeToolId;

    unsigned char   m_dragStatus;

    unsigned char   m_onSplitter;

    bool            m_showHeader;

    virtual wxPGProperty* DoGetPropertyByName( const wxString& name ) const;

    /** Select and displays a given page. */
    virtual bool DoSelectPage( int index );

    // Sets some members to defaults.
    void Init1();

    // Initializes some members.
    void Init2( int style );

/*#ifdef __WXMSW__
    virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle) const;
#endif*/

    virtual bool ProcessEvent( wxEvent& event );

    /** Recalculates new positions for components, according to the
        given size.
    */
    void RecalculatePositions( int width, int height );

    /** (Re)creates/destroys controls, according to the window style bits. */
    void RecreateControls();

    void UpdateDescriptionBox( int new_splittery, int new_width, int new_height );

    void RepaintDescBoxDecorations( wxDC& dc,
                                    int newSplitterY,
                                    int newWidth,
                                    int newHeight );

    void SetDescribedProperty( wxPGProperty* p );

    // Reimplement these to handle "descboxheight" state item
    virtual bool SetEditableStateItem( const wxString& name, wxVariant value );
    virtual wxVariant GetEditableStateItem( const wxString& name ) const;

private:
    DECLARE_EVENT_TABLE()
};

// -----------------------------------------------------------------------

inline int wxPropertyGridPage::GetIndex() const
{
    if ( !m_manager )
        return wxNOT_FOUND;
    return m_manager->GetPageByState(this);
}

// -----------------------------------------------------------------------

#endif // wxUSE_PROPGRID

#endif // _WX_PROPGRID_MANAGER_H_