interface/panel.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        panel.h
   3 // Purpose:     interface of wxPanel
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxPanel
  11     @wxheader{panel.h}
  12
  13     A panel is a window on which controls are placed. It is usually placed within
  14     a frame. Its main feature over its parent class wxWindow is code for handling
  15     child windows and TAB traversal. Since wxWidgets 2.9, there is support both
  16     for TAB traversal implemented by wxWidgets itself as well as native TAB
  17     traversal (such as for GTK 2.0).
  18
  19     @note Tab traversal is implemented through an otherwise undocumented
  20           intermediate wxControlContainer class from which any class can derive
  21           in addition to the normal wxWindow base class. Please see @c wx/containr.h
  22           and @c wx/panel.h to find out how this is achieved.
  23
  24     @note if not all characters are being intercepted by your OnKeyDown or
  25           OnChar handler, it may be because you are using the @c wxTAB_TRAVERSAL style,
  26           which grabs some keypresses for use by child controls.
  27
  28     @remarks By default, a panel has the same colouring as a dialog.
  29
  30     @library{wxbase}
  31     @category{miscwnd}
  32
  33     @see wxDialog
  34 */
  35 class wxPanel : public wxWindow
  36 {
  37 public:
  38
  39     /**
  40         Default constructor.
  41     */
  42     wxPanel();
  43
  44     /**
  45         Constructor.
  46
  47         @param parent
  48             The parent window.
  49         @param id
  50             An identifier for the panel. @c wxID_ANY is taken to mean a default.
  51         @param pos
  52             The panel position. The value @c wxDefaultPosition indicates a default position,
  53             chosen by either the windowing system or wxWidgets, depending on platform.
  54         @param size
  55             The panel size. The value @c wxDefaultSize indicates a default size, chosen by
  56             either the windowing system or wxWidgets, depending on platform.
  57         @param style
  58             The window style. See wxPanel.
  59         @param name
  60             Window name.
  61
  62         @see Create()
  63     */
  64     wxPanel(wxWindow* parent, wxWindowID id = wxID_ANY,
  65             const wxPoint& pos = wxDefaultPosition,
  66             const wxSize& size = wxDefaultSize,
  67             long style = wxTAB_TRAVERSAL,
  68             const wxString& name = "panel");
  69
  70     /**
  71         Destructor. Deletes any child windows before deleting the physical window.
  72     */
  73     ~wxPanel();
  74
  75     /**
  76         This method is overridden from wxWindow::AcceptsFocus()
  77         and returns @true only if there is no child window in the panel which
  78         can accept the focus. This is reevaluated each time a child
  79         window is added or removed from the panel.
  80     */
  81     bool AcceptsFocus() const;
  82
  83     /**
  84         Used for two-step panel construction. See wxPanel() for details.
  85     */
  86     bool Create(wxWindow* parent, wxWindowID id = wxID_ANY,
  87                 const wxPoint& pos = wxDefaultPosition,
  88                 const wxSize& size = wxDefaultSize,
  89                 long style = wxTAB_TRAVERSAL,
  90                 const wxString& name = "panel");
  91
  92     /**
  93         Sends a wxInitDialogEvent, which in turn transfers data to the dialog via
  94         validators.
  95
  96         @see wxInitDialogEvent
  97     */
  98     void InitDialog();
  99
 100     /**
 101         The default handler for wxEVT_SYS_COLOUR_CHANGED.
 102
 103         @param event
 104             The colour change event.
 105
 106         @remarks Changes the panel's colour to conform to the current settings
 107                  (Windows only). Add an event table entry for your panel
 108                  class if you wish the behaviour to be different (such
 109                  as keeping a user-defined background colour). If you do
 110                  override this function, call wxEvent::Skip() to propagate
 111                  the notification to child windows and controls.
 112
 113         @see wxSysColourChangedEvent
 114     */
 115     void OnSysColourChanged(wxSysColourChangedEvent& event);
 116
 117     /**
 118         Overrides wxWindow::SetFocus().
 119
 120         This method uses the (undocumented) mix-in class wxControlContainer which manages
 121         the focus and TAB logic for controls which usually have child controls.
 122
 123         In practice, if you call this method and the control has at least
 124         one child window, the focus will be given to the child window.
 125
 126         @see wxFocusEvent, wxWindow::SetFocus()
 127     */
 128     virtual void SetFocus();
 129
 130     /**
 131         In contrast to SetFocus() (see above) this will set the focus to the panel
 132         even if there are child windows in the panel. This is only rarely needed.
 133     */
 134     virtual void SetFocusIgnoringChildren();
 135 };
 136