5ca59eb82e
Previously, the functor was kept in a helper event handler that was bound to wxEVT_WINDOW_MODAL_DIALOG_CLOSED and only marked as already called, but never unbound. Consequently, the functor object remained allocated for as long as the event table existed and was only freed with the dialog instance. Change the logic to destroy the functor object as soon as it was called and is no longer needed for anything. This is particularly important when used with C++11 lambdas that capture the dialog in a wxWindowPtr pointer, because the pointer would be retained forever otherwise. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74890 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
442 lines
16 KiB
C++
442 lines
16 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/dialog.h
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// Purpose: wxDialogBase class
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 29.06.99
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// Copyright: (c) Vadim Zeitlin
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_DIALOG_H_BASE_
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#define _WX_DIALOG_H_BASE_
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#include "wx/toplevel.h"
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#include "wx/containr.h"
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#include "wx/sharedptr.h"
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class WXDLLIMPEXP_FWD_CORE wxSizer;
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class WXDLLIMPEXP_FWD_CORE wxStdDialogButtonSizer;
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class WXDLLIMPEXP_FWD_CORE wxBoxSizer;
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class WXDLLIMPEXP_FWD_CORE wxDialogLayoutAdapter;
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class WXDLLIMPEXP_FWD_CORE wxDialog;
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class WXDLLIMPEXP_FWD_CORE wxButton;
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class WXDLLIMPEXP_FWD_CORE wxScrolledWindow;
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class wxTextSizerWrapper;
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// Also see the bit summary table in wx/toplevel.h.
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#define wxDIALOG_NO_PARENT 0x00000020 // Don't make owned by apps top window
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#ifdef __WXWINCE__
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#define wxDEFAULT_DIALOG_STYLE (wxCAPTION | wxMAXIMIZE | wxCLOSE_BOX | wxNO_BORDER)
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#else
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#define wxDEFAULT_DIALOG_STYLE (wxCAPTION | wxSYSTEM_MENU | wxCLOSE_BOX)
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#endif
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// Layout adaptation levels, for SetLayoutAdaptationLevel
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// Don't do any layout adaptation
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#define wxDIALOG_ADAPTATION_NONE 0
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// Only look for wxStdDialogButtonSizer for non-scrolling part
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#define wxDIALOG_ADAPTATION_STANDARD_SIZER 1
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// Also look for any suitable sizer for non-scrolling part
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#define wxDIALOG_ADAPTATION_ANY_SIZER 2
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// Also look for 'loose' standard buttons for non-scrolling part
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#define wxDIALOG_ADAPTATION_LOOSE_BUTTONS 3
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// Layout adaptation mode, for SetLayoutAdaptationMode
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enum wxDialogLayoutAdaptationMode
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{
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wxDIALOG_ADAPTATION_MODE_DEFAULT = 0, // use global adaptation enabled status
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wxDIALOG_ADAPTATION_MODE_ENABLED = 1, // enable this dialog overriding global status
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wxDIALOG_ADAPTATION_MODE_DISABLED = 2 // disable this dialog overriding global status
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};
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enum wxDialogModality
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{
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wxDIALOG_MODALITY_NONE = 0,
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wxDIALOG_MODALITY_WINDOW_MODAL = 1,
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wxDIALOG_MODALITY_APP_MODAL = 2
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};
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extern WXDLLIMPEXP_DATA_CORE(const char) wxDialogNameStr[];
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class WXDLLIMPEXP_CORE wxDialogBase : public wxNavigationEnabled<wxTopLevelWindow>
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{
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public:
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wxDialogBase();
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virtual ~wxDialogBase() { }
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// define public wxDialog methods to be implemented by the derived classes
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virtual int ShowModal() = 0;
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virtual void EndModal(int retCode) = 0;
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virtual bool IsModal() const = 0;
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// show the dialog frame-modally (needs a parent), using app-modal
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// dialogs on platforms that don't support it
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virtual void ShowWindowModal () ;
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virtual void SendWindowModalDialogEvent ( wxEventType type );
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#ifdef wxHAS_EVENT_BIND
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template<typename Functor>
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void ShowWindowModalThenDo(const Functor& onEndModal);
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#endif // wxHAS_EVENT_BIND
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// Modal dialogs have a return code - usually the id of the last
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// pressed button
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void SetReturnCode(int returnCode) { m_returnCode = returnCode; }
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int GetReturnCode() const { return m_returnCode; }
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// Set the identifier for the affirmative button: this button will close
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// the dialog after validating data and calling TransferDataFromWindow()
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void SetAffirmativeId(int affirmativeId);
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int GetAffirmativeId() const { return m_affirmativeId; }
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// Set identifier for Esc key translation: the button with this id will
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// close the dialog without doing anything else; special value wxID_NONE
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// means to not handle Esc at all while wxID_ANY means to map Esc to
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// wxID_CANCEL if present and GetAffirmativeId() otherwise
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void SetEscapeId(int escapeId);
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int GetEscapeId() const { return m_escapeId; }
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// Find the parent to use for modal dialog: try to use the specified parent
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// but fall back to the current active window or main application window as
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// last resort if it is unsuitable.
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//
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// As this function is often called from the ctor, the window style may be
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// not set yet and hence must be passed explicitly to it so that we could
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// check whether it contains wxDIALOG_NO_PARENT bit.
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//
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// This function always returns a valid top level window or NULL.
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wxWindow *GetParentForModalDialog(wxWindow *parent, long style) const;
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// This overload can only be used for already initialized windows, i.e. not
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// from the ctor. It uses the current window parent and style.
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wxWindow *GetParentForModalDialog() const
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{
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return GetParentForModalDialog(GetParent(), GetWindowStyle());
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}
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#if wxUSE_STATTEXT // && wxUSE_TEXTCTRL
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// splits text up at newlines and places the lines into a vertical
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// wxBoxSizer
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wxSizer *CreateTextSizer( const wxString& message );
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// same as above but uses a customized wxTextSizerWrapper to create
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// non-standard controls for the lines
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wxSizer *CreateTextSizer( const wxString& message,
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wxTextSizerWrapper& wrapper );
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#endif // wxUSE_STATTEXT // && wxUSE_TEXTCTRL
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// returns a horizontal wxBoxSizer containing the given buttons
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//
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// notice that the returned sizer can be NULL if no buttons are put in the
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// sizer (this mostly happens under smart phones and other atypical
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// platforms which have hardware buttons replacing OK/Cancel and such)
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wxSizer *CreateButtonSizer(long flags);
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// returns a sizer containing the given one and a static line separating it
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// from the preceding elements if it's appropriate for the current platform
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wxSizer *CreateSeparatedSizer(wxSizer *sizer);
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// returns the sizer containing CreateButtonSizer() below a separating
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// static line for the platforms which use static lines for items
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// separation (i.e. not Mac)
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//
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// this is just a combination of CreateButtonSizer() and
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// CreateSeparatedSizer()
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wxSizer *CreateSeparatedButtonSizer(long flags);
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#if wxUSE_BUTTON
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wxStdDialogButtonSizer *CreateStdDialogButtonSizer( long flags );
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#endif // wxUSE_BUTTON
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// Do layout adaptation
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virtual bool DoLayoutAdaptation();
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// Can we do layout adaptation?
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virtual bool CanDoLayoutAdaptation();
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// Returns a content window if there is one. This can be used by the layout adapter, for
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// example to make the pages of a book control into scrolling windows
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virtual wxWindow* GetContentWindow() const { return NULL; }
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// Add an id to the list of main button identifiers that should be in the button sizer
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void AddMainButtonId(wxWindowID id) { m_mainButtonIds.Add((int) id); }
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wxArrayInt& GetMainButtonIds() { return m_mainButtonIds; }
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// Is this id in the main button id array?
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bool IsMainButtonId(wxWindowID id) const { return (m_mainButtonIds.Index((int) id) != wxNOT_FOUND); }
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// Level of adaptation, from none (Level 0) to full (Level 3). To disable adaptation,
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// set level 0, for example in your dialog constructor. You might
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// do this if you know that you are displaying on a large screen and you don't want the
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// dialog changed.
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void SetLayoutAdaptationLevel(int level) { m_layoutAdaptationLevel = level; }
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int GetLayoutAdaptationLevel() const { return m_layoutAdaptationLevel; }
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/// Override global adaptation enabled/disabled status
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void SetLayoutAdaptationMode(wxDialogLayoutAdaptationMode mode) { m_layoutAdaptationMode = mode; }
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wxDialogLayoutAdaptationMode GetLayoutAdaptationMode() const { return m_layoutAdaptationMode; }
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// Returns true if the adaptation has been done
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void SetLayoutAdaptationDone(bool adaptationDone) { m_layoutAdaptationDone = adaptationDone; }
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bool GetLayoutAdaptationDone() const { return m_layoutAdaptationDone; }
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// Set layout adapter class, returning old adapter
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static wxDialogLayoutAdapter* SetLayoutAdapter(wxDialogLayoutAdapter* adapter);
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static wxDialogLayoutAdapter* GetLayoutAdapter() { return sm_layoutAdapter; }
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// Global switch for layout adaptation
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static bool IsLayoutAdaptationEnabled() { return sm_layoutAdaptation; }
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static void EnableLayoutAdaptation(bool enable) { sm_layoutAdaptation = enable; }
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// modality kind
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virtual wxDialogModality GetModality() const;
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protected:
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// emulate click of a button with the given id if it's present in the dialog
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//
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// return true if button was "clicked" or false if we don't have it
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bool EmulateButtonClickIfPresent(int id);
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// this function is used by OnCharHook() to decide whether the given key
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// should close the dialog
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//
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// for most platforms the default implementation (which just checks for
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// Esc) is sufficient, but Mac port also adds Cmd-. here and other ports
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// could do something different if needed
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virtual bool IsEscapeKey(const wxKeyEvent& event);
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// end either modal or modeless dialog, for the modal dialog rc is used as
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// the dialog return code
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void EndDialog(int rc);
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// call Validate() and TransferDataFromWindow() and close dialog with
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// wxID_OK return code
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void AcceptAndClose();
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// The return code from modal dialog
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int m_returnCode;
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// The identifier for the affirmative button (usually wxID_OK)
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int m_affirmativeId;
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// The identifier for cancel button (usually wxID_CANCEL)
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int m_escapeId;
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// Flags whether layout adaptation has been done for this dialog
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bool m_layoutAdaptationDone;
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// Extra button identifiers to be taken as 'main' button identifiers
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// to be placed in the non-scrolling area
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wxArrayInt m_mainButtonIds;
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// Adaptation level
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int m_layoutAdaptationLevel;
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// Local override for global adaptation enabled status
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wxDialogLayoutAdaptationMode m_layoutAdaptationMode;
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// Global layout adapter
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static wxDialogLayoutAdapter* sm_layoutAdapter;
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// Global adaptation switch
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static bool sm_layoutAdaptation;
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private:
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// helper of GetParentForModalDialog(): returns the passed in window if it
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// can be used as our parent or NULL if it can't
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wxWindow *CheckIfCanBeUsedAsParent(wxWindow *parent) const;
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// Helper of OnCharHook() and OnCloseWindow(): find the appropriate button
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// for closing the dialog and send a click event for it.
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//
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// Return true if we found a button to close the dialog and "clicked" it or
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// false otherwise.
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bool SendCloseButtonClickEvent();
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// handle Esc key presses
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void OnCharHook(wxKeyEvent& event);
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// handle closing the dialog window
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void OnCloseWindow(wxCloseEvent& event);
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// handle the standard buttons
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void OnButton(wxCommandEvent& event);
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// update the background colour
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void OnSysColourChanged(wxSysColourChangedEvent& event);
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wxDECLARE_NO_COPY_CLASS(wxDialogBase);
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DECLARE_EVENT_TABLE()
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};
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/*!
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* Base class for layout adapters - code that, for example, turns a dialog into a
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* scrolling dialog if there isn't enough screen space. You can derive further
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* adapter classes to do any other kind of adaptation, such as applying a watermark, or adding
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* a help mechanism.
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*/
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class WXDLLIMPEXP_CORE wxDialogLayoutAdapter: public wxObject
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{
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DECLARE_CLASS(wxDialogLayoutAdapter)
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public:
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wxDialogLayoutAdapter() {}
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// Override this function to indicate that adaptation should be done
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virtual bool CanDoLayoutAdaptation(wxDialog* dialog) = 0;
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// Override this function to do the adaptation
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virtual bool DoLayoutAdaptation(wxDialog* dialog) = 0;
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};
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/*!
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* Standard adapter. Does scrolling adaptation for paged and regular dialogs.
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*
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*/
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class WXDLLIMPEXP_CORE wxStandardDialogLayoutAdapter: public wxDialogLayoutAdapter
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{
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DECLARE_CLASS(wxStandardDialogLayoutAdapter)
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public:
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wxStandardDialogLayoutAdapter() {}
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// Overrides
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// Indicate that adaptation should be done
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virtual bool CanDoLayoutAdaptation(wxDialog* dialog);
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// Do layout adaptation
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virtual bool DoLayoutAdaptation(wxDialog* dialog);
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// Implementation
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// Create the scrolled window
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virtual wxScrolledWindow* CreateScrolledWindow(wxWindow* parent);
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#if wxUSE_BUTTON
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// Find a standard or horizontal box sizer
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virtual wxSizer* FindButtonSizer(bool stdButtonSizer, wxDialog* dialog, wxSizer* sizer, int& retBorder, int accumlatedBorder = 0);
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// Check if this sizer contains standard buttons, and so can be repositioned in the dialog
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virtual bool IsOrdinaryButtonSizer(wxDialog* dialog, wxBoxSizer* sizer);
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// Check if this is a standard button
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virtual bool IsStandardButton(wxDialog* dialog, wxButton* button);
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// Find 'loose' main buttons in the existing layout and add them to the standard dialog sizer
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virtual bool FindLooseButtons(wxDialog* dialog, wxStdDialogButtonSizer* buttonSizer, wxSizer* sizer, int& count);
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#endif // wxUSE_BUTTON
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// Reparent the controls to the scrolled window, except those in buttonSizer
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virtual void ReparentControls(wxWindow* parent, wxWindow* reparentTo, wxSizer* buttonSizer = NULL);
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static void DoReparentControls(wxWindow* parent, wxWindow* reparentTo, wxSizer* buttonSizer = NULL);
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// A function to fit the dialog around its contents, and then adjust for screen size.
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// If scrolled windows are passed, scrolling is enabled in the required orientation(s).
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virtual bool FitWithScrolling(wxDialog* dialog, wxScrolledWindow* scrolledWindow);
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virtual bool FitWithScrolling(wxDialog* dialog, wxWindowList& windows);
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static bool DoFitWithScrolling(wxDialog* dialog, wxScrolledWindow* scrolledWindow);
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static bool DoFitWithScrolling(wxDialog* dialog, wxWindowList& windows);
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// Find whether scrolling will be necessary for the dialog, returning wxVERTICAL, wxHORIZONTAL or both
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virtual int MustScroll(wxDialog* dialog, wxSize& windowSize, wxSize& displaySize);
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static int DoMustScroll(wxDialog* dialog, wxSize& windowSize, wxSize& displaySize);
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};
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#if defined(__WXUNIVERSAL__) && !defined(__WXMICROWIN__)
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#include "wx/univ/dialog.h"
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#else
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#if defined(__WXMSW__)
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#include "wx/msw/dialog.h"
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#elif defined(__WXMOTIF__)
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#include "wx/motif/dialog.h"
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#elif defined(__WXGTK20__)
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#include "wx/gtk/dialog.h"
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#elif defined(__WXGTK__)
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#include "wx/gtk1/dialog.h"
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#elif defined(__WXMAC__)
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#include "wx/osx/dialog.h"
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#elif defined(__WXCOCOA__)
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#include "wx/cocoa/dialog.h"
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#elif defined(__WXPM__)
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#include "wx/os2/dialog.h"
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#endif
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#endif
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class WXDLLIMPEXP_CORE wxWindowModalDialogEvent : public wxCommandEvent
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{
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public:
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wxWindowModalDialogEvent (wxEventType commandType = wxEVT_NULL, int id = 0)
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: wxCommandEvent(commandType, id) { }
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wxDialog *GetDialog() const
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{ return wxStaticCast(GetEventObject(), wxDialog); }
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int GetReturnCode() const
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{ return GetDialog()->GetReturnCode(); }
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virtual wxEvent *Clone() const { return new wxWindowModalDialogEvent (*this); }
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private:
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DECLARE_DYNAMIC_CLASS_NO_ASSIGN(wxWindowModalDialogEvent )
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};
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wxDECLARE_EXPORTED_EVENT(WXDLLIMPEXP_CORE, wxEVT_WINDOW_MODAL_DIALOG_CLOSED , wxWindowModalDialogEvent );
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typedef void (wxEvtHandler::*wxWindowModalDialogEventFunction)(wxWindowModalDialogEvent &);
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#define wxWindowModalDialogEventHandler(func) \
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wxEVENT_HANDLER_CAST(wxWindowModalDialogEventFunction, func)
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#define EVT_WINDOW_MODAL_DIALOG_CLOSED(winid, func) \
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wx__DECLARE_EVT1(wxEVT_WINDOW_MODAL_DIALOG_CLOSED, winid, wxWindowModalDialogEventHandler(func))
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#ifdef wxHAS_EVENT_BIND
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template<typename Functor>
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class wxWindowModalDialogEventFunctor
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{
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public:
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wxWindowModalDialogEventFunctor(const Functor& f)
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: m_f(new Functor(f))
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{}
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void operator()(wxWindowModalDialogEvent& event)
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{
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if ( m_f )
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{
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// We only want to call this handler once. Also, by deleting
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// the functor here, its data (such as wxWindowPtr pointing to
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// the dialog) are freed immediately after exiting this operator().
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wxSharedPtr<Functor> functor(m_f);
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m_f.reset();
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(*functor)(event.GetReturnCode());
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}
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else // was already called once
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{
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event.Skip();
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}
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}
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private:
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wxSharedPtr<Functor> m_f;
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};
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template<typename Functor>
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void wxDialogBase::ShowWindowModalThenDo(const Functor& onEndModal)
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{
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Bind(wxEVT_WINDOW_MODAL_DIALOG_CLOSED,
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wxWindowModalDialogEventFunctor<Functor>(onEndModal));
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ShowWindowModal();
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};
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#endif // wxHAS_EVENT_BIND
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#endif
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// _WX_DIALOG_H_BASE_
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