Add wxTimePickerCtrl class.

Implement wxTimePickerCtrl natively for MSW and add a generic implementation
(very loosely based on the original class by Paul Breen) for the other
platforms.

Also update the calendar sample to show the new control.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69224 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/timectrl.h

@@ -0,0 +1,108 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx/timectrl.h
+// Purpose:     interface of wxTimePickerCtrl
+// Author:      Vadim Zeitlin
+// Created:     2011-09-22
+// RCS-ID:      $Id$
+// Copyright:   (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+    @class wxTimePickerCtrl
+
+    This control allows the user to enter time.
+
+    It is similar to wxDatePickerCtrl but is used for time, and not date,
+    selection. While GetValue() and SetValue() still work with values of type
+    wxDateTime (because wxWidgets doesn't provide a time-only class), their
+    date part is ignored by this control.
+
+    It is only available if @c wxUSE_TIMEPICKCTRL is set to 1.
+
+    This control currently doesn't have any specific flags.
+
+    @beginEventEmissionTable{wxDateEvent}
+    @event{EVT_TIME_CHANGED(id, func)}
+           This event fires when the user changes the current selection in the
+           control.
+    @endEventTable
+
+    @library{wxadv}
+    @category{pickers}
+    @appearance{timepickerctrl.png}
+
+    @see wxDatePickerCtrl, wxDateEvent
+
+    @since 2.9.3
+*/
+class wxTimePickerCtrl : public wxControl
+{
+public:
+    /**
+        Initializes the object and calls Create() with all the parameters.
+    */
+    wxTimePickerCtrl(wxWindow* parent, wxWindowID id,
+                     const wxDateTime& dt = wxDefaultDateTime,
+                     const wxPoint& pos = wxDefaultPosition,
+                     const wxSize& size = wxDefaultSize,
+                     long style = wxTP_DEFAULT,
+                     const wxValidator& validator = wxDefaultValidator,
+                     const wxString& name = "timectrl");
+
+    /**
+        Create the control window.
+
+        This method should only be used for objects created using default
+        constructor.
+
+        @param parent
+            Parent window, must not be non-@NULL.
+        @param id
+            The identifier for the control.
+        @param dt
+            The initial value of the control, if an invalid date (such as the
+            default value) is used, the control is set to current time.
+        @param pos
+            Initial position.
+        @param size
+            Initial size. If left at default value, the control chooses its own
+            best size by using the height approximately equal to a text control
+            and width large enough to show the time fully.
+        @param style
+            The window style, should be left at 0 as there are no special
+            styles for this control in this version.
+        @param validator
+            Validator which can be used for additional checks.
+        @param name
+            Control name.
+
+        @return @true if the control was successfully created or @false if
+                 creation failed.
+    */
+    bool Create(wxWindow* parent, wxWindowID id,
+                const wxDateTime& dt = wxDefaultDateTime,
+                const wxPoint& pos = wxDefaultPosition,
+                const wxSize& size = wxDefaultSize,
+                long style = wxDP_DEFAULT | wxDP_SHOWCENTURY,
+                const wxValidator& validator = wxDefaultValidator,
+                const wxString& name = "timectrl");
+
+    /**
+        Returns the currently entered time.
+
+        The date part of the returned wxDateTime object is always set to today
+        and should be ignored, only the time part is relevant.
+    */
+    virtual wxDateTime GetValue() const = 0;
+
+    /**
+        Changes the current value of the control.
+
+        The date part of @a dt is ignored, only the time part is displayed in
+        the control. The @a dt object must however be valid.
+
+        Calling this method does not result in a time change event.
+    */
+    virtual void SetValue(const wxDateTime& dt) = 0;
+};