wxHeaderCtrl is the control containing the column headings which is usually
used for display of tabular data.
- It is used as part of wxGrid, in wxDataViewCtrl and in the report view of
- wxListCtrl but can be also used independently.
- In general this class is meant to be used as part of another
- control which already stores the column information somewhere as it can't
- be used directly: instead you need to inherit from it and implement the
- GetColumn() method to provide column information. See wxHeaderCtrlSimple
- for a concrete control class which can be used directly.
+ It is used as part of wxGrid, in generic version wxDataViewCtrl and report
+ view of wxListCtrl but can be also used independently. In general this
+ class is meant to be used as part of another control which already stores
+ the column information somewhere as it can't be used directly: instead you
+ need to inherit from it and implement the GetColumn() method to provide
+ column information. See wxHeaderCtrlSimple for a concrete control class
+ which can be used directly.
In addition to labeling the columns, the control has the following
features:
@style{wxHD_ALLOW_REORDER}
If this style is specified (it is by default), the user can reorder
the control columns by dragging them.
+ @style{wxHD_ALLOW_HIDE}
+ If this style is specified, the control shows a popup menu allowing the
+ user to change the columns visibility on right mouse click. Notice that
+ the program can always hide or show the columns, this style only
+ affects the users capability to do it.
@style{wxHD_DEFAULT_STYLE}
Symbolic name for the default control style, currently equal to
@c wxHD_ALLOW_REORDER.
Show the popup menu allowing the user to show or hide the columns.
This functions shows the popup menu containing all columns with check
- marks for the ones which are currently shown at the current mouse
- position. It is meant to be called from EVT_HEADER_RIGHT_CLICK handler
- and should toggle the visibility of the n-th column if the function
- returns valid column index and not wxID_NONE which is returned if the
- user cancels the menu.
-
+ marks for the ones which are currently shown and allows the user to
+ check or uncheck them to toggle their visibility. It is called from the
+ default EVT_HEADER_RIGHT_CLICK handler for the controls which have
+ wxHD_ALLOW_HIDE style. And if the column has wxHD_ALLOW_REORDER style
+ as well, the menu also contains an item to customize the columns shown
+ using which results in ShowCustomizeDialog() being called, please see
+ its description for more details.
+
+ If a column was toggled, UpdateColumnVisibility() virtual function is
+ called so it must be implemented for the controls with wxHD_ALLOW_HIDE
+ style or if you call this function explicitly.
+
+ @param pt
+ The position of the menu, in the header window coordinates.
@param title
The title for the menu if not empty.
@return
- A valid column index or wxID_NONE if the user didn't select any
- column.
+ @true if a column was shown or hidden or @false if nothing was
+ done, e.g. because the menu was cancelled.
+ */
+ bool ShowColumnsMenu(const wxPoint& pt, const wxString& title = wxString());
+
+ /**
+ Helper function appending the checkable items corresponding to all the
+ columns to the given menu.
+
+ This function is used by ShowColumnsMenu() but can also be used if you
+ show your own custom columns menu and still want all the columns shown
+ in it. It appends menu items with column labels as their text and
+ consecutive ids starting from @a idColumnsBase to the menu and checks
+ the items corresponding to the currently visible columns.
+
+ Example of use:
+ @code
+ wxMenu menu;
+ menu.Append(100, "Some custom command");
+ menu.AppendSeparator();
+ AddColumnsItems(menu, 200);
+ const int rc = GetPopupMenuSelectionFromUser(menu, pt);
+ if ( rc >= 200 )
+ ... toggle visibility of the column rc-200 ...
+ @endcode
+
+ @param menu
+ The menu to append the items to. It may be currently empty or not.
+ @param idColumnsBase
+ The id for the menu item corresponding to the first column, the
+ other ones are consecutive starting from it. It should be positive.
+ */
+ void AddColumnsItems(wxMenu& menu, int idColumnsBase = 0);
+
+ /**
+ Show the column customization dialog.
+
+ This function displays a modal dialog containing the list of all
+ columns which the user can use to reorder them as well as show or hide
+ individual columns.
+
+ If the user accepts the changes done in the dialog, the virtual
+ methods UpdateColumnVisibility() and UpdateColumnsOrder() will be
+ called so they must be overridden in the derived class if this method
+ is ever called. Please notice that the user will be able to invoke it
+ interactively from the header popup menu if the control has both
+ wxHD_ALLOW_HIDE and wxHD_ALLOW_REORDER styles.
+
+ @see wxRearrangeDialog
*/
- int ShowColumnsMenu(const wxString& title = wxString());
+ bool ShowCustomizeDialog();
protected:
/**
The column index, between 0 and the value last passed to
SetColumnCount().
*/
- virtual wxHeaderColumnBase& GetColumn(unsigned int idx) = 0;
+ virtual const wxHeaderColumnBase& GetColumn(unsigned int idx) const = 0;
+
+ /**
+ Method called when the column visibility is changed by the user.
+
+ This method is called from ShowColumnsMenu() or ShowCustomizeDialog()
+ when the user interactively hides or shows a column. A typical
+ implementation will simply update the internally stored column state.
+ Notice that there is no need to call UpdateColumn() from this method as
+ it is already done by wxHeaderCtrl itself.
+
+ The base class version doesn't do anything and must be overridden if
+ this method is called.
+
+ @param idx
+ The index of the column whose visibility was toggled.
+ @param show
+ The new visibility value, @true if the column is now shown or
+ @false if it is not hidden.
+ */
+ virtual void UpdateColumnVisibility(unsigned int idx, bool show);
+
+ /**
+ Method called when the columns order is changed in the customization
+ dialog.
+
+ This method is only called from ShowCustomizeDialog() when the user
+ changes the order of columns. In particular it is @em not called if a
+ single column changes place because the user dragged it to the new
+ location, the EVT_HEADER_END_REORDER event handler should be used to
+ react to this.
+
+ A typical implementation in a derived class will update the display
+ order of the columns in the associated control, if any. Notice that
+ there is no need to call SetColumnsOrder() from it as wxHeaderCtrl does
+ it itself.
+
+ The base class version doesn't do anything and must be overridden if
+ this method is called.
+
+ @param order
+ The new column order. This array uses the same convention as
+ SetColumnsOrder().
+ */
+ virtual void UpdateColumnsOrder(const wxArrayInt& order);
/**
Method which may be implemented by the derived classes to allow double
{
public:
protected:
- virtual wxHeaderColumnBase& GetColumn(unsigned int idx)
+ virtual wxHeaderColumnBase& GetColumn(unsigned int idx) const
{
return m_cols[idx];
}
@see AppendColumn()
*/
- void InsertColumn(const wxHeaderColumn& col, unsigned int idx);
+ void InsertColumn(const wxHeaderColumnSimple& col, unsigned int idx);
/**
Append the column to the end of the control.
@see InsertColumn()
*/
- void AppendColumn(const wxHeaderColumn& col);
+ void AppendColumn(const wxHeaderColumnSimple& col);
/**
Delete the column at the given position.
ascending or descending sort order respectively, if @c -1 remove
the currently shown sort indicator.
*/
- virtual void ShowSortIndicator(unsigned int idx, int sortOrder);
+ void ShowSortIndicator(unsigned int idx, bool ascending = true);
/**
Remove the sort indicator from the given column.
@param idx
The column to remove sort indicator for.
*/
- void RemoveSortIndicator(unsigned int idx);
+ void RemoveSortIndicator();
protected:
/**
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