wxWidgets/interface/wx/ctrlsub.h

/////////////////////////////////////////////////////////////////////////////
// Name:        ctrlsub.h
// Purpose:     interface of wxControlWithItems
// Author:      wxWidgets team
// RCS-ID:      $Id$
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


/**
    @class wxItemContainerImmutable

    wxItemContainer defines an interface which is implemented by all controls
    which have string subitems each of which may be selected.

    It is decomposed in wxItemContainerImmutable which omits all methods
    adding/removing items and is used by wxRadioBox and wxItemContainer itself.

    Note that this is not a control, it's a mixin interface that classes
    have to derive from in addition to wxControl or wxWindow.

    Examples: wxListBox, wxCheckListBox, wxChoice and wxComboBox (which
    implements an extended interface deriving from this one)

    @library{wxcore}
    @category{ctrl}

    @see wxControlWithItems, wxItemContainer
*/
class wxItemContainerImmutable
{
public:
    /// Constructor
    wxItemContainerImmutable();

    //@{

    /**
        Returns the number of items in the control.

        @see IsEmpty()
    */
    virtual unsigned int GetCount() const = 0;

    /**
        Returns @true if the control is empty or @false if it has some items.

        @see GetCount()
    */
    bool IsEmpty() const;

    /**
        Returns the label of the item with the given index.

        @param n
            The zero-based index.

        @return The label of the item or an empty string if the position was
                invalid.
    */
    virtual wxString GetString(unsigned int n) const = 0;

    /**
        Returns the array of the labels of all items in the control.
    */
    wxArrayString GetStrings() const;

    /**
        Sets the label for the given item.

        @param n
            The zero-based item index.
        @param string
            The label to set.
    */
    virtual void SetString(unsigned int n, const wxString& string) = 0;

    /**
        Finds an item whose label matches the given string.

        @param string
            String to find.
        @param caseSensitive
            Whether search is case sensitive (default is not).

        @return The zero-based position of the item, or wxNOT_FOUND if the
                string was not found.
    */
    virtual int FindString(const wxString& string, bool caseSensitive = false) const;

    //@}

    /// @name Selection
    //@{

    /**
        Sets the selection to the given item @a n or removes the selection
        entirely if @a n == @c wxNOT_FOUND.

        Note that this does not cause any command events to be emitted nor does
        it deselect any other items in the controls which support multiple
        selections.

        @param n
            The string position to select, starting from zero.

        @see SetString(), SetStringSelection()
    */
    virtual void SetSelection(int n) = 0;

    /**
        Returns the index of the selected item or @c wxNOT_FOUND if no item is
        selected.

        @return The position of the current selection.

        @remarks This method can be used with single selection list boxes only,
                 you should use wxListBox::GetSelections() for the list
                 boxes with wxLB_MULTIPLE style.

        @see SetSelection(), GetStringSelection()
    */
    virtual int GetSelection() const = 0;

    /**
        Selects the item with the specified string in the control. This doesn't
        cause any command events to be emitted.

        @param string
            The string to select.

        @return @true if the specified string has been selected, @false if it
                wasn't found in the control.
    */
    bool SetStringSelection(const wxString& string);

    /**
        Returns the label of the selected item or an empty string if no item is
        selected.

        @see GetSelection()
    */
    virtual wxString GetStringSelection() const;

    /**
        This is the same as SetSelection() and exists only because it is
        slightly more natural for controls which support multiple selection.
    */
    void Select(int n);

    //@}
};


/**
    @class wxItemContainer

    This class is an abstract base class for some wxWidgets controls which
    contain several items such as wxListBox, wxCheckListBox, wxComboBox or
    wxChoice. It defines an interface which is implemented by all controls
    which have string subitems each of which may be selected.

    wxItemContainer extends wxItemContainerImmutable interface with methods
    for adding/removing items.

    It defines the methods for accessing the controls items and although each
    of the derived classes implements them differently, they still all conform
    to the same interface.

    The items in a wxItemContainer have (non-empty) string labels and,
    optionally, client data associated with them. Client data may be of two
    different kinds: either simple untyped (@c void *) pointers which are
    simply stored by the control but not used in any way by it, or typed
    pointers (wxClientData*) which are owned by the control meaning that the
    typed client data (and only it) will be deleted when an item is deleted
    using Delete() or the entire control is cleared using Clear(), which also
    happens when it is destroyed.

    Finally note that in the same control all items must have client data of
    the same type (typed or untyped), if any. This type is determined by the
    first call to Append() (the version with client data pointer) or
    SetClientData().

    Note that this is not a control, it's a mixin interface that classes
    have to derive from in addition to wxControl or wxWindow. Convenience
    class wxControlWithItems is provided for this purpose.

    @library{wxcore}
    @category{ctrl}

    @see wxControlWithItems, wxItemContainerImmutable
*/
class wxItemContainer : public wxItemContainerImmutable
{
public:
    //@{

    /**
        Appends item into the control.

        @param item
            String to add.

        @return The return value is the index of the newly inserted item.
                Note that this may be different from the last one if the
                control is sorted (e.g. has @c wxLB_SORT or @c wxCB_SORT
                style).
    */
    int Append(const wxString& item);

    /**
        Appends item into the control.

        @param item
            String to add.
        @param clientData
            Pointer to client data to associate with the new item.

        @return The return value is the index of the newly inserted item.
                Note that this may be different from the last one if the
                control is sorted (e.g. has @c wxLB_SORT or @c wxCB_SORT
                style).
    */
    int Append(const wxString& item, void* clientData);

    /**
        Appends item into the control.

        @param item
            String to add.
        @param clientData
            Pointer to client data to associate with the new item.

        @return The return value is the index of the newly inserted item.
                Note that this may be different from the last one if the
                control is sorted (e.g. has @c wxLB_SORT or @c wxCB_SORT
                style).
    */
    int Append(const wxString& item, wxClientData* clientData);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
    */
    int Append(const wxArrayString& items);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    int Append(const wxArrayString& items, void **clientData);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    int Append(const wxArrayString& items, wxClientData **clientData);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
    */
    int Append(unsigned int n, const wxString* items);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    int Append(unsigned int n, const wxString* items,
               void** clientData);

    /**
        Appends several items at once into the control.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    int Append(unsigned int n, const wxString* items,
                wxClientData** clientData);
    //@}

    /**
        Removes all items from the control.
        Clear() also deletes the client data of the existing items if it is
        owned by the control.
    */
    void Clear();

    /**
        Deletes an item from the control.

        The client data associated with the item will be also deleted if it is
        owned by the control.  Note that it is an error (signalled by an assert
        failure in debug builds) to remove an item with the index negative or
        greater or equal than the number of items in the control.

        @param n
            The zero-based item index.

        @see Clear()
    */
    void Delete(unsigned int n);


    /**
        Returns the client object associated with the given item and transfers
        its ownership to the caller.

        This method, unlike GetClientObject(), expects the caller to delete the
        returned pointer. It also replaces the internally stored pointer with
        @NULL, i.e. completely detaches the client object pointer from the
        control.

        It's an error to call this method unless HasClientObjectData() returns
        @true.

        @param n
            The zero-based item index.
        @return The associated client object pointer to be deleted by caller or
            @NULL.

        @since 2.9.2
     */
    wxClientData *DetachClientObject(unsigned int n);

    /**
       Returns true, if either untyped data (@c void*) or object data (wxClientData*)
       is associated with the items of the control.
    */
    bool HasClientData() const;

    /**
       Returns true, if object data is associated with the items of the
       control.

       Object data pointers have the type @c wxClientData* instead of @c void*
       and, importantly, are owned by the control, i.e. will be deleted by it,
       unlike their untyped counterparts.
    */
    bool HasClientObjectData() const;

    /**
       Returns true, if untyped data (@c void*)
       is associated with the items of the control.
    */
    bool HasClientUntypedData() const;


    //@{

    /**
        Returns a pointer to the client data associated with the given item (if
        any).  It is an error to call this function for a control which doesn't
        have untyped client data at all although it is OK to call it even if
        the given item doesn't have any client data associated with it (but
        other items do).

        @param n
            The zero-based position of the item.

        @return A pointer to the client data, or @NULL if not present.
    */
    void* GetClientData(unsigned int n) const;

    /**
        Returns a pointer to the client data associated with the given item (if
        any).  It is an error to call this function for a control which doesn't
        have typed client data at all although it is OK to call it even if the
        given item doesn't have any client data associated with it (but other
        items do).

        Notice that the returned pointer is still owned by the control and will
        be deleted by it, use DetachClientObject() if you want to remove the
        pointer from the control.

        @param n
            The zero-based position of the item.

        @return A pointer to the client data, or @NULL if not present.
    */
    wxClientData* GetClientObject(unsigned int n) const;

    /**
        Associates the given untyped client data pointer with the given item.
        Note that it is an error to call this function if any typed client data
        pointers had been associated with the control items before.

        @param n
            The zero-based item index.
        @param data
            The client data to associate with the item.
    */
    void SetClientData(unsigned int n, void* data);

    /**
        Associates the given typed client data pointer with the given item: the
        @a data object will be deleted when the item is deleted (either
        explicitly by using Delete() or implicitly when the control itself is
        destroyed).  Note that it is an error to call this function if any
        untyped client data pointers had been associated with the control items
        before.

        @param n
            The zero-based item index.
        @param data
            The client data to associate with the item.
    */
    void SetClientObject(unsigned int n, wxClientData* data);

    //@}

    //@{

    /**
        Inserts item into the control.

        @param item
            String to add.
        @param pos
            Position to insert item before, zero based.

        @return The return value is the index of the newly inserted item.
                If the insertion failed for some reason, -1 is returned.
    */
    int Insert(const wxString& item, unsigned int pos);

    /**
        Inserts item into the control.

        @param item
            String to add.
        @param pos
            Position to insert item before, zero based.
        @param clientData
            Pointer to client data to associate with the new item.

        @return The return value is the index of the newly inserted item.
                If the insertion failed for some reason, -1 is returned.
    */
    int Insert(const wxString& item, unsigned int pos, void* clientData);

    /**
        Inserts item into the control.

        @param item
            String to add.
        @param pos
            Position to insert item before, zero based.
        @param clientData
            Pointer to client data to associate with the new item.

        @return The return value is the index of the newly inserted item.
                If the insertion failed for some reason, -1 is returned.
    */
    int Insert(const wxString& item, unsigned int pos,
               wxClientData* clientData);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param items
            Array of strings to insert.
        @param pos
            Position to insert the items before, zero based.
    */
    int Insert(const wxArrayString& items, unsigned int pos);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param items
            Array of strings to insert.
        @param pos
            Position to insert the items before, zero based.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    int Insert(const wxArrayString& items, unsigned int pos,
                void **clientData);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param items
            Array of strings to insert.
        @param pos
            Position to insert the items before, zero based.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    int Insert(const wxArrayString& items, unsigned int pos,
                wxClientData **clientData);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param pos
            Position to insert the items before, zero based.
    */
    int Insert(unsigned int n, const wxString* items,
                unsigned int pos);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param pos
            Position to insert the new items before, zero based.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    int Insert(unsigned int n, const wxString* items,
                unsigned int pos,
                void** clientData);

    /**
        Inserts several items at once into the control.

        Notice that calling this method is usually much faster than inserting
        them one by one if you need to insert a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param pos
            Position to insert the new items before, zero based.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    int Insert(unsigned int n, const wxString* items,
                unsigned int pos,
                wxClientData** clientData);
    //@}

    //@{
    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
    */
    void Set(const wxArrayString& items);

    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    void Set(const wxArrayString& items, void **clientData);

    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param items
            Array of strings to insert.
        @param clientData
            Array of client data pointers of the same size as @a items to
            associate with the new items.
    */
    void Set(const wxArrayString& items, wxClientData **clientData);

    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
    */
    void Set(unsigned int n, const wxString* items);

    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    void Set(unsigned int n, const wxString* items, void** clientData);

    /**
        Replaces the current control contents with the given items.

        Notice that calling this method is usually much faster than appending
        them one by one if you need to add a lot of items.

        @param n
            Number of items in the @a items array.
        @param items
            Array of strings of size @a n.
        @param clientData
            Array of client data pointers of size @a n to associate with the
            new items.
    */
    void Set(unsigned int n, const wxString* items, wxClientData** clientData);
    //@}
};


/**
    @class wxControlWithItems

    This is convenience class that derives from both wxControl and
    wxItemContainer. It is used as basis for some wxWidgets controls
    (wxChoice and wxListBox).

    @library{wxcore}
    @category{ctrl}

    @see wxItemContainer, wxItemContainerImmutable
*/
class wxControlWithItems : public wxControl, public wxItemContainer
{
};