// wxEvent-derived classes
// Author: wxWidgets team
// RCS-ID: $Id$
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
/**
processed, ProcessEvent() on wxTheApp object is called as the last
step.
- Notice that steps (3)-(5) are performed in ProcessEventHere() which is
- called by this function.
+ Notice that steps (2)-(6) are performed in ProcessEventLocally()
+ which is called by this function.
@param event
Event to process.
virtual bool ProcessEvent(wxEvent& event);
/**
- Try to process the event in this event handler.
+ Try to process the event in this handler and all those chained to it.
+
+ As explained in ProcessEvent() documentation, the event handlers may be
+ chained in a doubly-linked list. This function tries to process the
+ event in this handler (including performing any pre-processing done in
+ TryBefore(), e.g. applying validators) and all those following it in
+ the chain until the event is processed or the chain is exhausted.
- This method is called from ProcessEvent(), please see the detailed
- description of the event processing logic there.
+ This function is called from ProcessEvent() and, in turn, calls
+ TryThis() for each handler in turn. It is not virtual and so cannot be
+ overridden but can, and should, be called to forward an event to
+ another handler instead of ProcessEvent() which would result in a
+ duplicate call to TryAfter(), e.g. resulting in all unprocessed events
+ being sent to the application object multiple times.
- It is @em not virtual and so may not be overridden.
+ @since 2.9.1
@param event
Event to process.
@return
- @true if this object itself defines a handler for this event and
- the handler didn't skip the event.
+ @true if this handler of one of those chained to it processed the
+ event.
*/
- bool ProcessEventHere(wxEvent& event);
+ bool ProcessEventLocally(wxEvent& event);
/**
Processes an event by calling ProcessEvent() and handles any exceptions
};
@endcode
- @see ProcessEvent(), ProcessEventHere()
+ @see ProcessEvent()
*/
virtual bool TryBefore(wxEvent& event);
+ /**
+ Try to process the event in this event handler.
+
+ This method is called from ProcessEventLocally() and thus, indirectly,
+ from ProcessEvent(), please see the detailed description of the event
+ processing logic there.
+
+ It is currently @em not virtual and so may not be overridden.
+
+ @since 2.9.1
+
+ @param event
+ Event to process.
+ @return
+ @true if this object itself defines a handler for this event and
+ the handler didn't skip the event.
+ */
+ bool TryThis(wxEvent& event);
+
/**
Method called by ProcessEvent() as last resort.
};
@endcode
- @see ProcessEvent(), ProcessEventHere()
+ @see ProcessEvent()
*/
virtual bool TryAfter(wxEvent& event);
};
/**
@class wxKeyEvent
- This event class contains information about keypress (character) events.
+ This event class contains information about key press and release events.
Notice that there are three different kinds of keyboard events in wxWidgets:
key down and up events and char events. The difference between the first two
generated) down events but only one up so it is wrong to assume that there is
one up event corresponding to each down one.
- Both key events provide untranslated key codes while the char event carries
- the translated one. The untranslated code for alphanumeric keys is always
- an upper case value. For the other keys it is one of @c WXK_XXX values
- from the ::wxKeyCode enumeration.
- The translated key is, in general, the character the user expects to appear
- as the result of the key combination when typing the text into a text entry
- zone, for example.
+ Both key down and up events provide untranslated key codes while the char
+ event carries the translated one. The untranslated code for alphanumeric
+ keys is always an upper case value. For the other keys it is one of @c
+ WXK_XXX values from the ::wxKeyCode enumeration. The translated key is, in
+ general, the character the user expects to appear as the result of the key
+ combination when typing the text into a text entry zone, for example.
A few examples to clarify this (all assume that CAPS LOCK is unpressed
and the standard US keyboard): when the @c 'A' key is pressed, the key down
Although in this simple case it is clear that the correct key code could be
found in the key down event handler by checking the value returned by
- wxKeyEvent::ShiftDown(), in general you should use @c EVT_CHAR for this as
- for non-alphanumeric keys the translation is keyboard-layout dependent and
- can only be done properly by the system itself.
+ wxKeyEvent::ShiftDown(), in general you should use @c EVT_CHAR if you need
+ the translated key as for non-alphanumeric keys the translation is
+ keyboard-layout dependent and can only be done properly by the system
+ itself.
Another kind of translation is done when the control key is pressed: for
example, for CTRL-A key press the key down event still carries the
same key code @c 'a' as usual but the char event will have key code of 1,
the ASCII value of this key combination.
+ Notice that while pressing any key will generate a key down event (except
+ in presence of IME perhaps) a few special keys don't generate a char event:
+ currently, Shift, Control (or Command), Alt (or Menu or Meta) and Caps, Num
+ and Scroll Lock keys don't do it. For all the other keys you have the
+ choice about whether to choose key down or char event for handling it and
+ either can be used. However it is advised to use char events only for the
+ keys that are supposed to generate characters on screen and key down events
+ for all the rest.
+
+
You may discover how the other keys on your system behave interactively by
- running the @ref page_samples_text wxWidgets sample and pressing some keys
- in any of the text controls shown in it.
+ running the @ref page_samples_keyboard wxWidgets sample and pressing some
+ keys in it.
@b Tip: be sure to call @c event.Skip() for events that you don't process in
key event function, otherwise menu shortcuts may cease to work under Windows.
@note For Windows programmers: The key and char events in wxWidgets are
similar to but slightly different from Windows @c WM_KEYDOWN and
@c WM_CHAR events. In particular, Alt-x combination will generate a
- char event in wxWidgets (unless it is used as an accelerator).
+ char event in wxWidgets (unless it is used as an accelerator) and
+ almost all keys, including ones without ASCII equivalents, generate
+ char events too.
@beginEventTable{wxKeyEvent}
/**
Returns the virtual key code. ASCII events return normal ASCII values,
- while non-ASCII events return values such as @b WXK_LEFT for the left cursor
- key. See ::wxKeyCode for a full list of the virtual key codes.
+ while non-ASCII events return values such as @b WXK_LEFT for the left
+ cursor key. See ::wxKeyCode for a full list of the virtual key codes.
- Note that in Unicode build, the returned value is meaningful only if the
- user entered a character that can be represented in current locale's default
- charset. You can obtain the corresponding Unicode character using GetUnicodeKey().
+ Note that in Unicode build, the returned value is meaningful only if
+ the user entered a character that can be represented in current
+ locale's default charset. You can obtain the corresponding Unicode
+ character using GetUnicodeKey().
*/
int GetKeyCode() const;
/**
Returns the Unicode character corresponding to this key event.
+ If the key pressed doesn't have any character value (e.g. a cursor key)
+ this method will return 0.
+
This function is only available in Unicode build, i.e. when
@c wxUSE_UNICODE is 1.
*/
@event{EVT_RIGHT_DCLICK(func)}
Process a @c wxEVT_RIGHT_DCLICK event.
@event{EVT_MOUSE_AUX1_DOWN(func)}
- Process a @c wxEVT_MOUSE_AUX1_DOWN event.
+ Process a @c wxEVT_AUX1_DOWN event.
@event{EVT_MOUSE_AUX1_UP(func)}
- Process a @c wxEVT_MOUSE_AUX1_UP event.
+ Process a @c wxEVT_AUX1_UP event.
@event{EVT_MOUSE_AUX1_DCLICK(func)}
- Process a @c wxEVT_MOUSE_AUX1_DCLICK event.
+ Process a @c wxEVT_AUX1_DCLICK event.
@event{EVT_MOUSE_AUX2_DOWN(func)}
- Process a @c wxEVT_MOUSE_AUX2_DOWN event.
+ Process a @c wxEVT_AUX2_DOWN event.
@event{EVT_MOUSE_AUX2_UP(func)}
- Process a @c wxEVT_MOUSE_AUX2_UP event.
+ Process a @c wxEVT_AUX2_UP event.
@event{EVT_MOUSE_AUX2_DCLICK(func)}
- Process a @c wxEVT_MOUSE_AUX2_DCLICK event.
+ Process a @c wxEVT_AUX2_DCLICK event.
@event{EVT_MOTION(func)}
Process a @c wxEVT_MOTION event.
@event{EVT_ENTER_WINDOW(func)}
@class wxShowEvent
An event being sent when the window is shown or hidden.
+ The event is triggered by calls to wxWindow::Show(), and any user
+ action showing a previously hidden window or vice versa (if allowed by
+ the current platform and/or window manager).
+ Notice that the event is not triggered when the application is iconized
+ (minimized) or restored under wxMSW.
Currently only wxMSW, wxGTK and wxOS2 generate such events.
*/
wxEventType wxEVT_NULL;
-/**
- Initializes a new event type using wxNewEventType().
-
- @deprecated Use wxDEFINE_EVENT() instead
-*/
-#define DEFINE_EVENT_TYPE(name) const wxEventType name = wxNewEventType();
-
/**
Generates a new unique event type.
...
- BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+ wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MY(wxID_ANY, MyFrame::OnMyEvent)
- END_EVENT_TABLE()
+ wxEND_EVENT_TABLE()
@endcode
@param evt
#define wx__DECLARE_EVT0(evt, fn) \
wx__DECLARE_EVT1(evt, wxID_ANY, fn)
-
/**
Use this macro inside a class declaration to declare a @e static event table
for that class.
- In the implementation file you'll need to use the BEGIN_EVENT_TABLE()
- and the END_EVENT_TABLE() macros, plus some additional @c EVT_xxx macro
+ In the implementation file you'll need to use the wxBEGIN_EVENT_TABLE()
+ and the wxEND_EVENT_TABLE() macros, plus some additional @c EVT_xxx macro
to capture events.
+
+ Note that this macro requires a final semicolon.
@see @ref overview_events_eventtables
*/
-#define DECLARE_EVENT_TABLE()
+#define wxDECLARE_EVENT_TABLE()
/**
Use this macro in a source file to start listing @e static event handlers
for a specific class.
- Use END_EVENT_TABLE() to terminate the event-declaration block.
+ Use wxEND_EVENT_TABLE() to terminate the event-declaration block.
@see @ref overview_events_eventtables
*/
-#define BEGIN_EVENT_TABLE(theClass, baseClass)
+#define wxBEGIN_EVENT_TABLE(theClass, baseClass)
/**
Use this macro in a source file to end listing @e static event handlers
for a specific class.
- Use BEGIN_EVENT_TABLE() to start the event-declaration block.
+ Use wxBEGIN_EVENT_TABLE() to start the event-declaration block.
@see @ref overview_events_eventtables
*/
-#define END_EVENT_TABLE()
+#define wxEND_EVENT_TABLE()
/**
In a GUI application, this function posts @a event to the specified @e dest
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