自学教程：C++ IsModal函数代码示例

void IngameWindow::MouseLeftUp(const MouseCoords& mc){    // Bewegung stoppen    isMoving = false;    // beiden Buttons oben links und rechts prfen    const Rect rec[2] =    {        GetLeftButtonRect(),        GetRightButtonRect()    };    for(unsigned i = 0; i < 2; ++i)    {        button_state[i] = BUTTON_UP;        if(Coll(mc.x, mc.y, rec[i]))        {            if(i == 0 && (!IsModal() || closeOnRightClick_))                Close();            else if(i==1 && !IsModal())            {                SetMinimized(!IsMinimized());                LOADER.GetSoundN("sound", 113)->Play(255, false);            }        }    }}

void dlgSearchObject::OnCancel(wxCommandEvent &ev){	if (IsModal())		EndModal(wxID_CANCEL);	else		Destroy();}

void pgDialog::OnCancel(wxCommandEvent &ev){	if (IsModal())		EndModal(wxID_CANCEL);	else		Destroy();}

void pgDialog::OnClose(wxCloseEvent &event){	if (IsModal())		EndModal(wxID_CANCEL);	else		Destroy();}

void DlgSaveLayout::OnOkClick( wxCommandEvent& event ){	if(!m_ComboLayout->GetValue().IsEmpty())    {		if(bSave)		{			wxMainFrame::Get()->AddLayout(m_ComboLayout->GetValue());		}		else		{			wxMainFrame::Get()->RemoveLayout(m_ComboLayout->GetValue());		}        if ( IsModal() )            EndModal(wxID_OK); // If modal        else        {            SetReturnCode(wxID_OK);            this->Show(false); // If modeless        }    }		else	{		wxMessageBox(wxT("You must enter a layout name"), wxT("Error"));	}}

void DIALOG_DRC_CONTROL::OnLeftDClickClearance( wxMouseEvent& event ){    event.Skip();    // I am assuming that the double click actually changed the selected item.    // please verify this.    int selection = m_ClearanceListBox->GetSelection();    if( selection != wxNOT_FOUND )    {        // Find the selected MARKER in the PCB, position cursor there.        // Then close the dialog.        const DRC_ITEM* item = m_ClearanceListBox->GetItem( selection );        if( item )        {            m_brdEditor->CursorGoto( item->GetPointA() );            m_brdEditor->GetGalCanvas()->GetView()->SetCenter( VECTOR2D( item->GetPointA() ) );            if( !IsModal() )            {                // turn control over to m_brdEditor, hide this DIALOG_DRC_CONTROL window,                // no destruction so we can preserve listbox cursor                Show( false );                // We do not want the clarification popup window.                // when releasing the left button in the main window                m_brdEditor->SkipNextLeftButtonReleaseEvent();            }        }    }}

int wxDialog::ShowModal(){    if ( IsModal() )    {       wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );       return GetReturnCode();    }    // use the apps top level window as parent if none given unless explicitly    // forbidden    wxWindow * const parent = GetParentForModalDialog();    if ( parent && parent != this )    {        m_parent = parent;    }    Show(true);    m_isShowingModal = true;    wxASSERT_MSG( !m_windowDisabler, wxT("disabling windows twice?") );#if defined(__WXGTK__) || defined(__WXMGL__)    wxBusyCursorSuspender suspender;    // FIXME (FIXME_MGL) - make sure busy cursor disappears under MSW too#endif    m_windowDisabler = new wxWindowDisabler(this);    if ( !m_eventLoop )        m_eventLoop = new wxEventLoop;    m_eventLoop->Run();    return GetReturnCode();}

void frmExport::OnCancel(wxCommandEvent &ev){    if (IsModal())        EndModal(wxID_CANCEL);    else        Destroy();}

bool wxDialog::Show(bool show){    if ( !wxDialogBase::Show(show) )    {        // nothing to do        return FALSE;    }    if ( show )    {        // usually will result in TransferDataToWindow() being called        InitDialog();    }    if ( IsModal() )    {        if ( show )        {            DoShowModal();        }        else // end of modal dialog        {            // this will cause IsModalShowing() return FALSE and our local            // message loop will terminate            wxModalDialogs.DeleteObject(this);        }    }    return TRUE;}

void wxDialogBase::EndDialog(int rc){    if ( IsModal() )        EndModal(rc);    else        Hide();}

void DIALOG_CLEANUP_TRACKS_AND_VIAS::OnLeftDClickItem( wxMouseEvent& event ){    event.Skip();    int selection = m_ItemsListBox->GetSelection();    if( selection != wxNOT_FOUND )    {        // Find the selected DRC_ITEM in the listbox, position cursor there.        // Then hide the dialog.        const DRC_ITEM* item = m_ItemsListBox->GetItem( selection );        if( item )        {            m_parentFrame->FocusOnLocation( item->GetPointA(), true, true );            if( !IsModal() )            {                Show( false );                // We do not want the clarify selection popup when releasing the                // left button in the main window                m_parentFrame->SkipNextLeftButtonReleaseEvent();            }        }    }}

void tmwxOptimizerDialog::DoStartModal() {  /* CAF - essentially lifted from wxGTK 2.5.1's wxDialog::ShowModal, up to     grabbing the focus. */    if (IsModal()) {       wxFAIL_MSG( wxT("wxDialog:ShowModal called twice") );       mStatus = GetReturnCode();       return;    }    // use the apps top level window as parent if none given unless explicitly    // forbidden    if (! GetParent() && !(GetWindowStyleFlag() & wxDIALOG_NO_PARENT)) {        wxWindow *parent = wxTheApp->GetTopWindow();        if (parent && parent != this &&            parent -> IsBeingDeleted() &&            ! (parent->GetExtraStyle() & wxWS_EX_TRANSIENT)) {            m_parent = parent;            gtk_window_set_transient_for (GTK_WINDOW(m_widget),            GTK_WINDOW(parent->m_widget) );        }    }    wxBeginBusyCursor ();    Show (true);    SetFocus();    m_modalShowing = true;    g_openDialogs++;    gtk_grab_add (m_widget);}

int wxDialog::ShowModal(){    WX_TESTING_SHOW_MODAL_HOOK();    wxASSERT_MSG( !IsModal(), "ShowModal() can't be called twice" );    // release the mouse if it's currently captured as the window having it    // will be disabled when this dialog is shown -- but will still keep the    // capture making it impossible to do anything in the modal dialog itself    wxWindow * const win = wxWindow::GetCapture();    if ( win )        win->GTKReleaseMouseAndNotify();    wxWindow * const parent = GetParentForModalDialog();    if ( parent )    {        gtk_window_set_transient_for( GTK_WINDOW(m_widget),                                      GTK_WINDOW(parent->m_widget) );    }    wxBusyCursorSuspender cs; // temporarily suppress the busy cursor#if GTK_CHECK_VERSION(2,10,0)    unsigned sigId = 0;    gulong hookId = 0;#ifndef __WXGTK3__    // Ubuntu overlay scrollbar uses at least GTK 2.24    if (gtk_check_version(2,24,0) == NULL)#endif    {        sigId = g_signal_lookup("realize", GTK_TYPE_WIDGET);        hookId = g_signal_add_emission_hook(sigId, 0, realize_hook, NULL, NULL);    }#endif    Show( true );    m_modalShowing = true;    wxOpenModalDialogLocker modalLock;    // NOTE: gtk_window_set_modal internally calls gtk_grab_add() !    gtk_window_set_modal(GTK_WINDOW(m_widget), TRUE);    // Run modal dialog event loop.    {        wxGUIEventLoopTiedPtr modal(&m_modalLoop, new wxGUIEventLoop());        m_modalLoop->Run();    }#if GTK_CHECK_VERSION(2,10,0)    if (sigId)        g_signal_remove_emission_hook(sigId, hookId);#endif    gtk_window_set_modal(GTK_WINDOW(m_widget), FALSE);    return GetReturnCode();}

void ParamEdit::Close() {	if (IsModal()) 		EndModal(wxID_OK);	else {		SetReturnCode(wxID_OK);		Show(false);	}}

void wxGenericAboutDialog::OnCloseWindow(wxCloseEvent& event){    // safeguards in case the window is still shown using ShowModal    if ( !IsModal() )        Destroy();    event.Skip();}

void wxDialog::EndModal(int retCode){    wxASSERT_MSG( IsModal(), wxT("EndModal() called for non modal dialog") );    SetReturnCode(retCode);    Hide();}

void ParamEdit::OnCancel(wxCommandEvent & event) {	if (IsModal()) 		EndModal(wxID_CANCEL);	else {		SetReturnCode(wxID_CANCEL);		Show(false);	}}

void wxDialog::EndModal(int retCode){    wxASSERT_MSG( IsModal(), _T("EndModal() called for non modal dialog") );//    m_endModalCalled = true;    SetReturnCode(retCode);    Hide();}

void CConfigChooser::onCancel(wxCommandEvent& WXUNUSED(event)){	if (IsModal()) {		EndModal(wxID_CANCEL);	} else {		SetReturnCode(wxID_CANCEL);		Show(false);	}}

void ExecutionDialog::OnClose(wxCloseEvent &event){	Abort();	delete conn;	if (IsModal())		EndModal(-1);	else		Destroy();}

// show dialog modallyint wxDialog::ShowModal(){    wxASSERT_MSG( !IsModal(), _T("wxDialog::ShowModal() reentered?") );    m_oldFocus = FindFocus();    m_endModalCalled = false;    Show();    // EndModal may have been called from InitDialog handler (called from    // inside Show()), which would cause an infinite loop if we didn't take it    // into account    if ( !m_endModalCalled )    {        // modal dialog needs a parent window, so try to find one        wxWindow *parent = GetParent();        if ( !parent )        {            parent = FindSuitableParent();        }        // remember where the focus was        wxWindow *oldFocus = m_oldFocus;        if ( !oldFocus )        {            // VZ: do we really want to do this?            oldFocus = parent;        }        // We have to remember the HWND because we need to check        // the HWND still exists (oldFocus can be garbage when the dialog        // exits, if it has been destroyed)        HWND hwndOldFocus = oldFocus ? GetHwndOf(oldFocus) : NULL;        // enter and run the modal loop        {            wxDialogModalDataTiedPtr modalData(&m_modalData,                                               new wxDialogModalData(this));            modalData->RunLoop();        }        // and restore focus        // Note that this code MUST NOT access the dialog object's data        // in case the object has been deleted (which will be the case        // for a modal dialog that has been destroyed before calling EndModal).        if ( oldFocus && (oldFocus != this) && ::IsWindow(hwndOldFocus))        {            // This is likely to prove that the object still exists            if (wxFindWinFromHandle((WXHWND) hwndOldFocus) == oldFocus)                oldFocus->SetFocus();        }    }    return GetReturnCode();}

void DatChoiceDialog::OnOkButtonClick(wxCommandEvent& event){    TransferDataFromWindow();    sCam=Choice1->GetString(Choice1->GetSelection());    sCadr=TextCtrl1->GetValue();    sBright=TextCtrl2->GetValue();    if (IsModal())        EndModal(wxID_OK);}

void ComboBox::HandleUpdate( float seconds ) {	Bin::HandleUpdate( seconds );	if( GetState() != State::ACTIVE ) {		if( IsModal() ) {			ReleaseModal();		}	}}

void DIALOG_ANNOTATE::OnCancelClick( wxCommandEvent& event ){    if( IsModal() )        EndModal( wxID_CANCEL );    else    {        SetReturnCode( wxID_CANCEL );        this->Show( false );    }}

// Replacement for Show(TRUE) for modal dialogs - returns return codeint wxDialog::ShowModal(){    if ( !IsModal() )    {        SetModal(TRUE);    }    Show(TRUE);    return GetReturnCode();}

bool MenuBar::Command(int id, int subId, Win *win, void *d){	if (id == CMD_CHECK) 		return Parent() ? Parent()->Command(id,subId,this,d) : false;		SetSelect(-1);	if (IsModal()) EndModal(id);		return (Parent()) ?  Parent()->Command(id, subId, win, d) : false;}