A list control presents lists in a number of formats: list view, report view,
icon view and small icon view. In any case, elements are numbered from zero.
-
-Using many of wxListCtrl is shown in the
+For all these modes, the items are stored in the control and must be added to
+it using \helpref{InsertItem}{wxlistctrlinsertitem} method.
+
+A special case of report view quite different from the other modes of the list
+control is a virtual control in which the items data (including text, images
+and attributes) is managed by the main program and is requested by the control
+itself only when needed which allows to have controls with millions of items
+without consuming much memory. To use virtual list control you must use
+\helpref{SetItemCount}{wxlistctrlsetitemcount} first and overload at least
+\helpref{OnGetItemText}{wxlistctrlongetitemtext} (and optionally
+\helpref{OnGetItemImage}{wxlistctrlongetitemimage} and
+\helpref{OnGetItemAttr}{wxlistctrlongetitemattr}) to return the information
+about the items when the control requests it. Virtual list control can be used
+as a normal one except that no operations which can take time proportional to
+the number of items in the control happen -- this is required to allow having a
+practically infinite number of items. For example, in a multiple selection
+virtual list control, the selections won't be sent when many items are selected
+at once because this could mean iterating over all the items.
+
+Using many of wxListCtrl features is shown in the
\helpref{corresponding sample}{samplelistctrl}.
To intercept events from a list control, use the event table macros described
\wxheading{Window styles}
-\twocolwidtha{5cm}
+\twocolwidtha{7cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{\windowstyle{wxLC\_LIST}}{multicolumn list view, with optional small icons.
Columns are computed automatically, i.e. you don't set columns as in wxLC\_REPORT. In other words,
the list wraps, unlike a wxListBox.}
\twocolitem{\windowstyle{wxLC\_REPORT}}{single or multicolumn report view, with optional header.}
+\twocolitem{\windowstyle{wxLC\_VIRTUAL}}{virtual control, may only be used with wxLC\_REPORT}
\twocolitem{\windowstyle{wxLC\_ICON}}{Large icon view, with optional labels.}
\twocolitem{\windowstyle{wxLC\_SMALL\_ICON}}{Small icon view, with optional labels.}
\twocolitem{\windowstyle{wxLC\_ALIGN\_TOP}}{Icons align to the top. Win32 default, Win32 only. }
\twocolitem{{\bf EVT\_LIST\_END\_LABEL\_EDIT(id, func)}}{Finish editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
\twocolitem{{\bf EVT\_LIST\_DELETE\_ITEM(id, func)}}{Delete an item.}
\twocolitem{{\bf EVT\_LIST\_DELETE\_ALL\_ITEMS(id, func)}}{Delete all items.}
-\twocolitem{{\bf EVT\_LIST\_GET\_INFO(id, func)}}{Request information from the application, usually the item text.}
-\twocolitem{{\bf EVT\_LIST\_SET\_INFO(id, func)}}{Information is being supplied (not implemented).}
+%\twocolitem{{\bf EVT\_LIST\_GET\_INFO(id, func)}}{Request information from the application, usually the item text.}
+%\twocolitem{{\bf EVT\_LIST\_SET\_INFO(id, func)}}{Information is being supplied (not implemented).}
\twocolitem{{\bf EVT\_LIST\_ITEM\_SELECTED(id, func)}}{The item has been selected.}
\twocolitem{{\bf EVT\_LIST\_ITEM\_DESELECTED(id, func)}}{The item has been deselected.}
\twocolitem{{\bf EVT\_LIST\_ITEM\_ACTIVATED(id, func)}}{The item has been activated (ENTER or double click).}
+\twocolitem{{\bf EVT\_LIST\_ITEM\_FOCUSED(id, func)}}{The currently focused item has changed.}
+\twocolitem{{\bf EVT\_LIST\_ITEM\_MIDDLE\_CLICK(id, func)}}{The middle mouse button has been clicked on an item.}
+\twocolitem{{\bf EVT\_LIST\_ITEM\_RIGHT\_CLICK(id, func)}}{The right mouse button has been clicked on an item.}
\twocolitem{{\bf EVT\_LIST\_KEY\_DOWN(id, func)}}{A key has been pressed.}
\twocolitem{{\bf EVT\_LIST\_INSERT\_ITEM(id, func)}}{An item has been inserted.}
\twocolitem{{\bf EVT\_LIST\_COL\_CLICK(id, func)}}{A column ({\bf m\_col}) has been left-clicked.}
-\twocolitem{{\bf EVT\_LIST\_ITEM\_RIGHT\_CLICK(id, func)}}{An item has been right-clicked.}
+\twocolitem{{\bf EVT\_LIST\_COL\_RIGHT\_CLICK(id, func)}}{A column ({\bf m\_col}) has been right-clicked.}
+\twocolitem{{\bf EVT\_LIST\_COL\_BEGIN\_DRAG(id, func)}}{The user started resizing a column - can be vetoed.}
+\twocolitem{{\bf EVT\_LIST\_COL\_DRAGGING(id, func)}}{The divider between columns is being dragged.}
+\twocolitem{{\bf EVT\_LIST\_COL\_END\_DRAG(id, func)}}{A column has been resized by the user.}
+\twocolitem{{\bf EVT\_LIST\_CACHE\_HINT(id, func)}}{Prepare cache for a virtual list control}
\end{twocollist}%
\wxheading{See also}
\helpref{wxListCtrl overview}{wxlistctrloverview}, \helpref{wxListBox}{wxlistbox}, \helpref{wxTreeCtrl}{wxtreectrl},\rtfsp
-\helpref{wxImageList}{wximagelist}, \helpref{wxListEvent}{wxlistevent}
+\helpref{wxImageList}{wximagelist}, \helpref{wxListEvent}{wxlistevent},
+\helpref{wxListItem}{wxlistitem}
\latexignore{\rtfignore{\wxheading{Members}}}
\end{twocollist}}
}
+\perlnote{In wxPerl there are three methods instead of a single overloaded
+method:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf FindItem( start, str, partial = FALSE ) }}{}
+\twocolitem{{\bf FindItemData( start, data ) }}{}
+\twocolitem{{\bf FindItemAtPos( start, point, direction )}}{}
+\end{twocollist}
+}}
+
\membersection{wxListCtrl::GetColumn}\label{wxlistctrlgetcolumn}
\constfunc{bool}{GetColumn}{\param{int }{col}, \param{wxListItem\& }{item}}
Gets information about this column. See \helpref{wxListCtrl::SetItem}{wxlistctrlsetitem} for more
information.
+\perlnote{In wxPerl this method takes only the {\bf col} parameter and
+ returns a Wx::ListItem ( or undef ).}
+
+\membersection{wxListCtrl::GetColumnCount}\label{wxlistctrlgetcolumncount}
+
+\constfunc{int}{GetColumnCount}{\void}
+
+Returns the number of columns.
+
\membersection{wxListCtrl::GetColumnWidth}\label{wxlistctrlgetcolumnwidth}
\constfunc{int}{GetColumnWidth}{\param{int }{col}}
\membersection{wxListCtrl::GetEditControl}\label{wxlistctrlgeteditcontrol}
-\constfunc{wxTextCtrl\&}{GetEditControl}{\void}
+\constfunc{wxTextCtrl *}{GetEditControl}{\void}
+
+Returns the edit control being currently used to edit a label. Returns {\tt NULL}
+if no label is being edited.
-Gets the edit control for editing labels.
+{\bf NB:} It is currently only implemented for wxMSW.
\membersection{wxListCtrl::GetImageList}\label{wxlistctrlgetimagelist}
for the item ID, an optional integer for the column number, and
returns the wxListItem object.}
+\perlnote{In wxPerl this method takes as parameter the {\bf ID} of the item
+and ( optionally ) the column, and returns a Wx::ListItem object.}
+
\membersection{wxListCtrl::GetItemCount}\label{wxlistctrlgetitemcount}
\constfunc{int}{GetItemCount}{\void}
\pythonnote{The wxPython version of this method accepts only the item
ID and returns the wxPoint.}
+\perlnote{In wxPerl this method takes only the {\bf item} parameter and
+returns a Wx::Point ( or undef ).}
+
\membersection{wxListCtrl::GetItemRect}\label{wxlistctrlgetitemrect}
\constfunc{bool}{GetItemRect}{\param{long }{item}, \param{wxRect\& }{rect}, \param{int }{code = wxLIST\_RECT\_BOUNDS}}
\pythonnote{The wxPython version of this method accepts only the item
ID and code and returns the wxRect.}
+\perlnote{In wxPerl this method takes only the {\bf item} parameter and
+returns a Wx::Rect ( or undef ).}
+
\membersection{wxListCtrl::GetItemSpacing}\label{wxlistctrlgetitemspacing}
\constfunc{int}{GetItemSpacing}{\param{bool }{isSmall}}
\constfunc{long}{GetNextItem}{\param{long }{item}, \param{int }{geometry = wxLIST\_NEXT\_ALL}, \param{int }{state = wxLIST\_STATE\_DONTCARE}}
-Searches for an item with the given goemetry or state, starting from
+Searches for an item with the given geometry or state, starting from
{\it item} but excluding the {\it item} itself. If {\it item} is -1,
the first item that matches the specified flags will be returned.
this method. The first value is the item id and the second is the
flags value mentioned above.}
+\perlnote{In wxPerl this method only takes the {\bf point} parameter
+ and returns a 2-element list {\tt ( item, flags )}.}
+
\membersection{wxListCtrl::InsertColumn}\label{wxlistctrlinsertcolumn}
\func{long}{InsertColumn}{\param{long }{col}, \param{wxListItem\& }{info}}
\end{twocollist}}
}
+\perlnote{In wxPerl there are four methods instead of a single overloaded
+method:\par
+\indented{2cm}{\begin{twocollist}
+\twocolitem{{\bf InsertItem( item )}}{Inserts a Wx::ListItem}
+\twocolitem{{\bf InsertStringItem( index, label )}}{Inserts a string item}
+\twocolitem{{\bf InsertImageItem( index, imageIndex )}}{Inserts an image item}
+\twocolitem{{\bf InsertImageStringItem( index, label, imageIndex )}}{Inserts
+ an item with a string and an image}
+\end{twocollist}
+}}
+
+\membersection{wxListCtrl::OnGetItemAttr}\label{wxlistctrlongetitemattr}
+
+\func{virtual wxListItemAttr *}{OnGetItemAttr}{\param{long }{item}}
+
+This function may be overloaded in the derived class for a control with
+{\tt wxLC\_VIRTUAL} style. It should return the attribute for the
+for the specified {\tt item} or {\tt NULL} to use the default appearance
+parameters.
+
+The base class version always returns {\tt NULL}.
+
+\wxheading{See also}
+
+\helpref{OnGetItemImage}{wxlistctrlongetitemimage},\\
+\helpref{OnGetItemText}{wxlistctrlongetitemtext}
+
+\membersection{wxListCtrl::OnGetItemImage}\label{wxlistctrlongetitemimage}
+
+\func{virtual int}{OnGetItemImage}{\param{long }{item}}
+
+This function must be overloaded in the derived class for a control with
+{\tt wxLC\_VIRTUAL} style having an \helpref{image list}{wxlistctrlsetimagelist}
+(if the control doesn't have an image list, it is not necessary to overload
+ it). It should return the index of the items image in the controls image list
+or $-1$ for no image.
+
+The base class version always returns $-1$.
+
+\wxheading{See also}
+
+\helpref{OnGetItemText}{wxlistctrlongetitemtext},\\
+\helpref{OnGetItemAttr}{wxlistctrlongetitemattr}
+
+\membersection{wxListCtrl::OnGetItemText}\label{wxlistctrlongetitemtext}
+
+\func{virtual wxString}{OnGetItemText}{\param{long }{item}, \param{long }{column}}
+
+This function {\bf must} be overloaded in the derived class for a control with
+{\tt wxLC\_VIRTUAL} style. It should return the string containing the text of
+the given {\it column} for the specified {\tt item}.
+
+\wxheading{See also}
+
+\helpref{SetItemCount}{wxlistctrlsetitemcount},\\
+\helpref{OnGetItemImage}{wxlistctrlongetitemimage},\\
+\helpref{OnGetItemAttr}{wxlistctrlongetitemattr}
+
\membersection{wxListCtrl::ScrollList}\label{wxlistctrlscrolllist}
\func{bool}{ScrollList}{\param{int }{dx}, \param{int }{dy}}
-Scrolls the list control. If in icon, small icon or report view mode,
-dx specifies the number of pixels to scroll. If in list view mode, dx
-specifies the number of columns to scroll.
+Scrolls the list control. If in icon, small icon or report view mode,
+{\it dx} specifies the number of pixels to scroll. If in list view mode,
+{\it dx} specifies the number of columns to scroll. {\it dy} always specifies
+the number of pixels to scroll vertically.
-If in icon, small icon or list view mode, dy specifies the number of pixels
-to scroll. If in report view mode, dy specifies the number of lines to scroll.
+{\bf NB:} This method is currently only implemented in the Windows version.
\membersection{wxListCtrl::SetBackgroundColour}\label{wxlistctrlsetbackgroundcolour}
\end{twocollist}}
}
+\membersection{wxListCtrl::SetItemCount}\label{wxlistctrlsetitemcount}
+
+\func{void}{SetItemCount}{\param{long }{count}}
+
+This method can only be used with virtual list controls. It is used to indicate
+to the control the number of items it contains. After calling it, the main
+program should be ready to handle calls to various item callbacks (such as
+\helpref{OnGetItemText}{wxlistctrlongetitemtext}) for all items in the range
+from $0$ to {\it count}.
+
\membersection{wxListCtrl::SetItemData}\label{wxlistctrlsetitemdata}
\func{bool}{SetItemData}{\param{long }{item}, \param{long }{data}}
SortItems with a reference to a callable object that expects two
parameters.}
+\perlnote{In wxPerl the comparison function must take just two parameters;
+ however, you may use a closure to achieve an effect similar to the
+ SortItems third parameter.}
+
projects / wxWidgets.git / blobdiff