data model. In detail, you need to override
\helpref{IsContainer}{wxdataviewmodeliscontainer},
\helpref{GetParent}{wxdataviewmodelgetparent},
+\helpref{GetChildren}{wxdataviewmodelgetchildren},
\helpref{GetColumnCount}{wxdataviewmodelgetcolumncount},
\helpref{GetColumnType}{wxdataviewmodelgetcolumntype} and
\helpref{GetValue}{wxdataviewmodelgetvalue} in order to
\helpref{ItemAdded}{wxdataviewmodelitemadded},
\helpref{ItemDeleted}{wxdataviewmodelitemdeleted},
\helpref{ItemChanged}{wxdataviewmodelitemchanged},
-\helpref{Cleared}{wxdataviewmodelcleared}.
+\helpref{Cleared}{wxdataviewmodelcleared}. There are
+plural forms for notification of addition, change
+or removal of several item at once. See
+\helpref{ItemsAdded}{wxdataviewmodelitesmadded},
+\helpref{ItemsDeleted}{wxdataviewmodelitemsdeleted},
+\helpref{ItemsChanged}{wxdataviewmodelitemschanged},
Note that wxDataViewModel does not define the position or
-index of any item in the control since several control might
-display the data differently, but wxDataViewModel does
+index of any item in the control because different controls
+might display the same data differently. wxDataViewModel does
provide a \helpref{Compare}{wxdataviewmodelcompare} method
which the wxDataViewCtrl may use to sort the data either
in conjunction with a column header or without (see
-\helpref{HasDefaultCompare}{wxdataviewmodelhasdefaultcompare}.
+\helpref{HasDefaultCompare}{wxdataviewmodelhasdefaultcompare}).
This class maintains a list of
\helpref{wxDataViewModelNotifier}{wxdataviewmodelnotifier}
Currently wxWidgets provides the following models apart
from the base model:
-\helpref{wxDataViewIndexListModel}{wxdataviewindexlistmodel}.
-It is planned to add helper classes for simple tree
-and list stores in the future.
+\helpref{wxDataViewIndexListModel}{wxdataviewindexlistmodel},
+\helpref{wxDataViewTreeStore}{wxdataviewtreestore}.
+
+Note that wxDataViewModel is reference counted, derives from
+\helpref{wxObjectRefData}{wxobjectrefdata} and cannot be deleted
+directly as it can be shares by several wxDataViewCtrl. This
+implies that you need to decrease the reference count after
+associating the model with a control like this:
+
+{\small%
+\begin{verbatim}
+ wxDataViewCtrl *musicCtrl = new wxDataViewCtrl( this, ID_MUSIC_CTRL, wxDefaultPosition,
+ wxDefaultSize, wxDV_MULTIPLE );
+ wxDataViewModel *musicModel = new MyMusicModel;
+ m_musicCtrl->AssociateModel( musicModel );
+ musicModel->DecRef(); // avoid memory leak !!
+
+ // add columns now
+\end{verbatim}
+}%
\wxheading{Derived from}
\membersection{wxDataViewModel::Cleared}\label{wxdataviewmodelcleared}
-\func{bool}{Cleared}{\void}
+\func{virtual bool}{Cleared}{\void}
Called to inform the model that all data has been deleted.
\membersection{wxDataViewModel::Compare}\label{wxdataviewmodelcompare}
-\func{int}{Compare}{\param{const wxDataViewItem\& }{item1}, \param{const wxDataViewItem\& }{item2}, \param{unsigned int }{column}, \param{bool }{ascending}}
+\func{virtual int}{Compare}{\param{const wxDataViewItem\& }{item1}, \param{const wxDataViewItem\& }{item2}, \param{unsigned int }{column}, \param{bool }{ascending}}
The compare function to be used by control. The default compare function
sorts by container and other items separately and in ascending order.
\membersection{wxDataViewModel::GetColumnCount}\label{wxdataviewmodelgetcolumncount}
-\constfunc{unsigned int}{GetColumnCount}{\void}
+\constfunc{virtual unsigned int}{GetColumnCount}{\void}
Override this to indicate the number of columns in the model.
\membersection{wxDataViewModel::GetColumnType}\label{wxdataviewmodelgetcolumntype}
-\constfunc{wxString}{GetColumnType}{\param{unsigned int }{col}}
+\constfunc{virtual wxString}{GetColumnType}{\param{unsigned int }{col}}
Override this to indicate what type of data is stored in the
column specified by {\it col}. This should return a string
indicating the type of data as reported by \helpref{wxVariant}{wxvariant}.
-\membersection{wxDataViewModel::GetFirstChild}\label{wxdataviewmodelgetfirstchild}
+\membersection{wxDataViewModel::GetChildren}\label{wxdataviewmodelgetchildren}
-\constfunc{wxDataViewItem}{GetFirstChild}{\param{const wxDataViewItem\& }{parent}}
+\constfunc{virtual unsigned int}{GetChildren}{\param{const wxDataViewItem\& }{item}, \param{wxDataViewItemArray\& }{children} }
-To be removed.
-
-\membersection{wxDataViewModel::GetNextSibling}\label{wxdataviewmodelgetnextsibling}
-
-\constfunc{wxDataViewItem}{GetNextSibling}{\param{const wxDataViewItem\& }{item}}
-
-To be removed.
+Override this so the control can query the child items of
+an item. Returns the number of items.
\membersection{wxDataViewModel::GetParent}\label{wxdataviewmodelgetparent}
-\constfunc{wxDataViewItem}{GetParent}{\param{const wxDataViewItem\& }{item}}
+\constfunc{virtual wxDataViewItem}{GetParent}{\param{const wxDataViewItem\& }{item}}
Override this to indicate which wxDataViewItem representing the parent
-of {\it item} or an invalid wxDataViewItem if {\it item} is the root item.
+of {\it item} or an invalid wxDataViewItem if the the root item is
+the parent item.
\membersection{wxDataViewModel::GetValue}\label{wxdataviewmodelgetvalue}
-\constfunc{void}{GetValue}{\param{wxVariant\& }{variant}, \param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
+\constfunc{virtual void}{GetValue}{\param{wxVariant\& }{variant}, \param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
Override this to indicate the value of {\it item}
A \helpref{wxVariant}{wxvariant} is used to store the data.
+
+\membersection{wxDataViewModel::HasContainerColumns}\label{wxdataviewmodelhascontainercolumns}
+
+\constfunc{virtual bool}{HasContainerColumns}{\param{const wxDataViewItem\& }{item}}
+
+Override this method to indicate if a container item merely
+acts as a headline (or for categorisation) or if it also
+acts a normal item with entries for futher columns. By
+default returns {\it false}.
+
\membersection{wxDataViewModel::HasDefaultCompare}\label{wxdataviewmodelhasdefaultcompare}
-\func{bool}{HasDefaultCompare}{\void}
+\constfunc{virtual bool}{HasDefaultCompare}{\void}
Override this to indicate that the model provides a default compare
function that the control should use if no wxDataViewColumn has been
\membersection{wxDataViewModel::IsContainer}\label{wxdataviewmodeliscontainer}
-\constfunc{bool}{IsContainer}{\param{const wxDataViewItem\& }{item}}
+\constfunc{virtual bool}{IsContainer}{\param{const wxDataViewItem\& }{item}}
Override this to indicate of {\it item} is a container, i.e. if
it can have child items.
\membersection{wxDataViewModel::ItemAdded}\label{wxdataviewmodelitemadded}
-\func{bool}{ItemAdded}{\param{const wxDataViewItem\& }{parent}, \param{const wxDataViewItem\& }{item}}
+\func{virtual bool}{ItemAdded}{\param{const wxDataViewItem\& }{parent}, \param{const wxDataViewItem\& }{item}}
Call this to inform the model that an item has been added
to the data.
\membersection{wxDataViewModel::ItemChanged}\label{wxdataviewmodelitemchanged}
-\func{bool}{ItemChanged}{\param{const wxDataViewItem\& }{item}}
+\func{virtual bool}{ItemChanged}{\param{const wxDataViewItem\& }{item}}
Call this to inform the model that an item has changed.
-\membersection{wxDataViewModel::ItemDeleted}\label{wxdataviewmodelitemdeleted}
+This will eventually emit a wxEVT\_DATAVIEW\_ITEM\_VALUE\_CHANGED
+event (in which the column fields will not be set) to the user.
-\func{bool}{ItemDeleted}{\param{const wxDataViewItem\& }{parent}, \param{const wxDataViewItem\& }{item}}
+\membersection{wxDataViewModel::ItemsAdded}\label{wxdataviewmodelitemsadded}
-Call this to inform the model that an item has been deleted.
+\func{virtual bool}{ItemsAdded}{\param{const wxDataViewItem\& }{parent}, \param{const wxDataViewItemArray\& }{items}}
+
+Call this to inform the model that several items have been added
+to the data.
+
+\membersection{wxDataViewModel::ItemsChanged}\label{wxdataviewmodelitemschanged}
+
+\func{virtual bool}{ItemsChanged}{\param{const wxDataViewItemArray\& }{items}}
+
+Call this to inform the model that several items have changed.
+
+This will eventually emit wxEVT\_DATAVIEW\_ITEM\_VALUE\_CHANGED
+events (in which the column fields will not be set) to the user.
+
+\membersection{wxDataViewModel::ItemsDeleted}\label{wxdataviewmodelitemsdeleted}
+
+\func{virtual bool}{ItemsDeleted}{\param{const wxDataViewItem\& }{parent}, \param{const wxDataViewItemArray\& }{items}}
+
+Call this to inform the model that several items have been deleted.
\membersection{wxDataViewModel::RemoveNotifier}\label{wxdataviewmodelremovenotifier}
\membersection{wxDataViewModel::Resort}\label{wxdataviewmodelresort}
-\func{void}{Resort}{\void}
+\func{virtual void}{Resort}{\void}
Call this to initiate a resort after the sort function has
been changed.
\membersection{wxDataViewModel::SetValue}\label{wxdataviewmodelsetvalue}
-\func{bool}{SetValue}{\param{const wxVariant\& }{variant}, \param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
+\func{virtual bool}{SetValue}{\param{const wxVariant\& }{variant}, \param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
This gets called in order to set a value in the data model.
The most common scenario is that the wxDataViewCtrl calls
\membersection{wxDataViewModel::ValueChanged}\label{wxdataviewmodelvaluechanged}
-\func{bool}{ValueChanged}{\param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
+\func{virtual bool}{ValueChanged}{\param{const wxDataViewItem\& }{item}, \param{unsigned int }{col}}
+
+Call this to inform this model that a value in the model has
+been changed. This is also called from wxDataViewCtrl's
+internal editing code, e.g. when editing a text field
+in the control.
-Call this to inform this model that a value in
-the model has been changed.
+This will eventually emit a wxEVT\_DATAVIEW\_ITEM\_VALUE\_CHANGED
+event to the user.
projects / wxWidgets.git / blobdiff