自学教程：C++ GetCharHeight函数代码示例

void AISTargetListDialog::RecalculateSize(){    if(g_bresponsive){        //  Make an estimate of the dialog size                wxSize esize;        esize.x = GetCharWidth() * 110;        esize.y = GetCharHeight() * 40;                wxSize dsize = gFrame->GetClientSize();        esize.y = wxMin(esize.y, dsize.y - (4 * GetCharHeight()));        esize.x = wxMin(esize.x, dsize.x - (2 * GetCharHeight()));        SetClientSize(esize);                wxSize fsize = GetSize();        fsize.y = wxMin(fsize.y, dsize.y - (2 * GetCharHeight()));        fsize.x = wxMin(fsize.x, dsize.x - (2 * GetCharHeight()));        SetSize(fsize);                if( m_pAuiManager ){            wxAuiPaneInfo &pane = m_pAuiManager->GetPane(_T("AISTargetList"));                    if(pane.IsOk()){                pane.FloatingSize(fsize.x, fsize.y);                wxPoint pos = gFrame->GetScreenPosition();                pane.FloatingPosition(pos.x + (dsize.x - fsize.x)/2, pos.y + (dsize.y - fsize.y)/2);            }                        m_pAuiManager->Update();        }            }    }

void WindowSetCursor (PCONINFO con, int x, int y, bool IsKanji){    if (IsKanji)        ChangeCaretSize (con->hWnd, GetCCharWidth (), GetCharHeight ());    else        ChangeCaretSize (con->hWnd, GetCharWidth (), GetCharHeight ());    SetCaretPos (con->hWnd, x * GetCharWidth (), y * GetCharHeight ());}

RECT CBitmapFont::CalculateRect(int id){	RECT rCell;	rCell.left	= (id % GetNumCols()) * GetCharWidth();	rCell.top	= (id / GetNumCols()) * GetCharHeight();	rCell.right		= rCell.left + GetCharWidth();	rCell.bottom	= rCell.top + GetCharHeight();	return rCell;}

void AISTargetAlertDialog::RecalculateSize( void ){    //  Count the lines in the currently displayed text string    unsigned int i=0;    int nline = 0;    while(i < m_alert_text.Length() ){        if(m_alert_text[i] == '/n')            nline++;        i++;    }    if(nline > m_max_nline)        m_max_nline = nline;        wxSize esize;    esize.x = GetCharWidth() * 45;    esize.y = GetCharHeight() * (m_max_nline + 4);//    SetSize(esize);    int height = m_pAlertTextCtl->GetInternalRepresentation()->GetHeight();    int adj_height = height + (GetCharHeight() * 4);    m_adj_height = wxMax(m_adj_height, adj_height);        esize.y = wxMin(esize.y, m_adj_height);///  SetClientSize(esize);    /*        wxSize dsize = GetParent()->GetClientSize();        wxSize fsize = GetSize();    fsize.y = wxMin(fsize.y, dsize.y - (1 * GetCharHeight()));    fsize.x = wxMin(fsize.x, dsize.x - (1 * GetCharHeight()));    SetSize(fsize);    */        if(!m_bsizeSet){        Fit();          // Sets the horizontal size OK        m_bsizeSet = true;    }        wxSize gSize = GetClientSize();        if(gSize.y != esize.y)            SetClientSize(gSize.x, esize.y);                g_Platform->PositionAISAlert( this );    }

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const{    wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);    // need extra space for the label:    *borderTop += GetCharHeight();}

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const{    static int extraTop = -1; // Uninitted    static int other = 5;    if ( extraTop == -1 )    {        // The minimal border used for the top. Later on the staticbox'        // font height is added to this.        extraTop = 0;        if ( UMAGetSystemVersion() >= 0x1030 /*Panther*/ )        {            // As indicated by the HIG, Panther needs an extra border of 11            // pixels (otherwise overlapping occurs at the top). The "other"            // border has to be 11.            extraTop = 11;            other = 11;        }    }    *borderTop = extraTop + GetCharHeight();    *borderOther = other;}

wxSize wxRadioBox::GetTotalButtonSize( const wxSize& rSizeBtn ) const{    int    nCx1;    int    nCy1;    int    nHeight;    int    nWidth;    int    nWidthLabel = 0;    nCx1 = GetCharWidth();    nCy1 = GetCharHeight();    nHeight = GetRowCount() * rSizeBtn.y + (2 * nCy1);    nWidth  = GetColumnCount() * (rSizeBtn.x + nCx1) + nCx1;    //    // And also wide enough for its label    //    wxString sStr = wxGetWindowText(GetHwnd());    if (!sStr.empty())    {        GetTextExtent( sStr                      ,&nWidthLabel                      ,NULL                     );        nWidthLabel += 2*nCx1;    }    if (nWidthLabel > nWidth)        nWidth = nWidthLabel;    wxSize total( nWidth, nHeight );    return total;} // end of wxRadioBox::GetTotalButtonSize

wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const{    wxASSERT_MSG( m_widget, wxS("GetSizeFromTextSize called before creation") );    // a GtkEntry for wxComboBox and a GtkCellView for wxChoice    GtkWidget* childPart = gtk_bin_get_child(GTK_BIN(m_widget));    // Set a as small as possible size for the control, so preferred sizes    // return "natural" sizes, not taking into account the previous ones (which    // seems to be GTK+3 behaviour)    gtk_widget_set_size_request(m_widget, 0, 0);    // We are interested in the difference of sizes between the whole contol    // and its child part. I.e. arrow, separators, etc.    GtkRequisition req;    gtk_widget_get_preferred_size(childPart, NULL, &req);    wxSize totalS = GTKGetPreferredSize(m_widget);    wxSize tsize(xlen + totalS.x - req.width, totalS.y);    // For a wxChoice, not for wxComboBox, add some margins    if ( !GTK_IS_ENTRY(childPart) )        tsize.IncBy(5, 0);    // Perhaps the user wants something different from CharHeight    if ( ylen > 0 )        tsize.IncBy(0, ylen - GetCharHeight());    return tsize;}

void wxBitmapComboBox::PostCreate(){    m_fontHeight = GetCharHeight() + EXTRA_FONT_HEIGHT;    while ( m_bitmaps.GetCount() < GetCount() )        m_bitmaps.Add( new wxBitmap() );}

wxSize wxChoice::DoGetBestSize() const{    // find the widest string    int wChoice = 0;    const unsigned int nItems = GetCount();    for ( unsigned int i = 0; i < nItems; i++ )    {        int wLine;        GetTextExtent(GetString(i), &wLine, NULL);        if ( wLine > wChoice )            wChoice = wLine;    }    // give it some reasonable default value if there are no strings in the    // list    if ( wChoice == 0 )        wChoice = 100;    // the combobox should be slightly larger than the widest string    wChoice += 5*GetCharWidth();    wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));    CacheBestSize(best);    return best;}

PathProp::PathProp( wxWindow* parent, wxWindowID id, const wxString& caption, const wxPoint& pos,        const wxSize& size, long style ){    m_opList = NULL;    m_nSelected = 0;    m_pEnroutePoint = NULL;    m_bStartNow = false;    m_pPath = NULL;    m_pEnroutePoint = NULL;    m_bStartNow = false;#ifdef __WXOSX__    style |= wxSTAY_ON_TOP;#endif    SetExtraStyle( GetExtraStyle() | wxWS_EX_BLOCK_EVENTS );    wxDialog::Create( parent, id, caption, pos, size, style );    wxFont *qFont = OCPNGetFont(_("Dialog"), 0);    SetFont( *qFont );            CreateControls();    //  Make an estimate of the dialog size, without scrollbars showing    wxSize esize;    esize.x = GetCharWidth() * 110;    esize.y = GetCharHeight() * 40;    SetSize( esize );    Centre();}

void RainExceptionDialog::_addExtraControls(){  m_pSaveBtn = new wxButton(this, wxID_SAVE, wxT("Copy to Clipboard"));  m_pStaticLine = new wxStaticLine(this, wxID_ANY);  m_pDetailList = new wxListCtrl(this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxSUNKEN_BORDER | wxLC_REPORT | wxLC_SINGLE_SEL);  m_pDetailList->InsertColumn(0, wxT("Message"));  m_pDetailList->InsertColumn(1, wxT("File"));  m_pDetailList->InsertColumn(2, wxT("Ln."));  size_t count = m_aMessages.GetCount();  for(size_t n = 0; n < count; ++n)  {    m_pDetailList->InsertItem(n, m_aMessages[n]);    m_pDetailList->SetItem(n, 1, m_aFiles[n]);    m_pDetailList->SetItem(n, 2, wxString::Format(wxT("%li"), m_aLines[n]));  }  m_pDetailList->SetColumnWidth(0, wxLIST_AUTOSIZE);  m_pDetailList->SetColumnWidth(1, wxLIST_AUTOSIZE);  m_pDetailList->SetColumnWidth(2, wxLIST_AUTOSIZE);  int height = GetCharHeight()*(count + 4);  int heightMax = wxGetDisplaySize().y - GetPosition().y - 2*GetMinHeight();  heightMax *= 9;  heightMax /= 10;  m_pDetailList->SetSize(wxDefaultCoord, wxMin(height, heightMax));}

wxSize wxChoice::DoGetSizeFromTextSize(int xlen, int ylen) const{    int cHeight = GetCharHeight();    // We are interested in the difference of sizes between the whole control    // and its child part. I.e. arrow, separators, etc.    wxSize tsize(xlen, 0);    // FIXME-VC6: Only VC6 needs this guard, see WINVER definition in    //            include/wx/msw/wrapwin.h#if defined(WINVER) && WINVER >= 0x0500    WinStruct<COMBOBOXINFO> info;    if ( MSWGetComboBoxInfo(&info) )    {        tsize.x += info.rcItem.left + info.rcButton.right - info.rcItem.right                    + info.rcItem.left + 3; // right and extra margins    }    else // Just use some rough approximation.#endif // WINVER >= 0x0500    {        tsize.x += 4*cHeight;    }    // set height on our own    if( HasFlag( wxCB_SIMPLE ) )        tsize.y = SetHeightSimpleComboBox(GetCount());    else        tsize.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cHeight);    // Perhaps the user wants something different from CharHeight    if ( ylen > 0 )        tsize.IncBy(0, ylen - cHeight);    return tsize;}

wxSize wxSpinCtrlGTKBase::DoGetSizeFromTextSize(int xlen, int ylen) const{    wxASSERT_MSG( m_widget, wxS("GetSizeFromTextSize called before creation") );    // Set an as small as possible size for the control, so preferred sizes    // return "natural" sizes, not taking into account the previous ones (which    // seems to be GTK+3 behaviour)    gtk_widget_set_size_request(m_widget, 0, 0);    // Both Gtk+2 and Gtk+3 use current value/range to measure control's width.    // So, we can't ask Gtk+ for its width. Instead, we used hardcoded values.    // Returned height is OK    wxSize totalS = GTKGetPreferredSize(m_widget);#if GTK_CHECK_VERSION(3,4,0)    // two buttons in horizontal    totalS.x = 46 + 15; // margins included#else    // two small buttons in vertical    totalS.x = GetFont().GetPixelSize().y + 13; // margins included#endif    wxSize tsize(xlen + totalS.x, totalS.y);    // Check if the user requested a non-standard height.    if ( ylen > 0 )        tsize.IncBy(0, ylen - GetCharHeight());    return tsize;}

		void RenderLine(uint8 *pStart, float xOff, float vLineTop, float vLineBottom, int nCursor, int nSelStart, int nSelEnd, View *pcView, bool bSelected)		{						Color32_s sCursCol(40,40,40);			Color32_s sCursLineCol(255,235,186);						if( ! bSelected )			{				sCursCol = lighten_color(sCursCol);				sCursLineCol = lighten_color(sCursLineCol);			}					float vCharWidth = GetCharWidth();			float vCharHeight = GetCharHeight();						uint8 *pEnd = GetBuffer() + GetBufferLength();			static char zLine[(3 * BYTES_PER_LINE) + 1];			uint8 *p = pStart;			for( int x = 0; x < 3 * BYTES_PER_LINE; x+=3 )			{				if( p < pEnd )				{					zLine[x] = get_nibble_char(*p, true);					zLine[x + 1] = get_nibble_char(*p, false);					p++;				} else {					zLine[x] = ' ';					zLine[x + 1] = ' ';				}				zLine[x + 2] = ' ';			}								Rect cRect(xOff + GetX() + 2, vLineTop, xOff + GetX() + GetWidth() - 2, vLineBottom);						pcView->SetFgColor(Color32_s(0,0,0));										if( nSelStart < 0 )			{								if( nCursor >= 0 )					pcView->FillRect(cRect, sCursLineCol);								pcView->DrawText(cRect, zLine);				if( nCursor >= 0 )				{					float vCursorX = cRect.left + (3 * vCharWidth * nCursor);					if( m_bSecondChar )						vCursorX += vCharWidth;					pcView->SetFgColor(sCursCol);					pcView->DrawLine(Point(vCursorX, vLineTop), Point(vCursorX, vLineBottom));					vCursorX++;					pcView->DrawLine(Point(vCursorX, vLineTop), Point(vCursorX, vLineBottom));				}			}			else			{				IPoint cSel1((int)(nSelStart * 3 * vCharWidth), (int)vCharHeight);				IPoint cSel2((int)((nSelEnd * 3 * vCharWidth) + (vCharWidth * 2)), (int)vCharHeight);				pcView->DrawSelectedText(cRect, zLine, cSel1, cSel2, SEL_CHAR);			}		}

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const{    wxStaticBoxBase::GetBordersForSizer(borderTop, borderOther);    // need extra space, don't know how much but this seems to be enough    *borderTop += GetCharHeight()/3;}

wxSize wxListBox::DoGetBestClientSize() const{    wxCoord width = 0,            height = 0;    size_t count = m_strings->GetCount();    for ( size_t n = 0; n < count; n++ )    {        wxCoord w,h;        GetTextExtent(this->GetString(n), &w, &h);        if ( w > width )            width = w;        if ( h > height )            height = h;    }    // if the listbox is empty, still give it some non zero (even if    // arbitrary) size - otherwise, leave small margin around the strings    if ( !width )        width = 100;    else        width += 3*GetCharWidth();    if ( !height )        height = GetCharHeight();    // we need the height of the entire listbox, not just of one line    height *= wxMax(count, 7);    return wxSize(width, height);}

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const{    static int extraTop = -1; // Uninitted    static int other = 5;    if ( extraTop == -1 )    {        // The minimal border used for the top.        // Later on, the staticbox's font height is added to this.        extraTop = 0;        // As indicated by the HIG, Panther needs an extra border of 11        // pixels (otherwise overlapping occurs at the top). The "other"        // border has to be 11.        extraTop = 11;#if wxOSX_USE_COCOA        other = 17;#else        other = 11;#endif    }    *borderTop = extraTop;    if ( !m_label.empty() )        *borderTop += GetCharHeight();    *borderOther = other;}

bool wxStatusBarGeneric::Create(wxWindow *parent,                                wxWindowID id,                                long style,                                const wxString& name){    style |= wxTAB_TRAVERSAL | wxFULL_REPAINT_ON_RESIZE;    if ( !wxWindow::Create(parent, id,                           wxDefaultPosition, wxDefaultSize,                           style, name) )        return false;    // The status bar should have a themed background    SetThemeEnabled( true );    InitColours();    int height = (int)((11*GetCharHeight())/10 + 2*GetBorderY());    SetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, height);    SetFieldsCount(1);#if defined( __WXGTK20__ )#if GTK_CHECK_VERSION(2,12,0)    if (HasFlag(wxSTB_SHOW_TIPS) && wx_is_at_least_gtk2(12))    {        g_object_set(m_widget, "has-tooltip", TRUE, NULL);        g_signal_connect(m_widget, "query-tooltip",                         G_CALLBACK(statusbar_query_tooltip), this);    }#endif#endif    return true;}

void wxStaticBox::GetBordersForSizer(int *borderTop, int *borderOther) const{    const int BORDER = 5; // FIXME: hardcoded value    *borderTop = GetLabel().empty() ? 2*BORDER : GetCharHeight();    *borderOther = BORDER;}

CSlideShowPanel::CSlideShowPanel( wxWindow* parent ) :    wxPanel( parent, wxID_ANY, wxDefaultPosition, wxSize(290+(2*SLIDESHOWBORDER), 126+(2*SLIDESHOWBORDER)), wxBORDER_NONE ){    int w, h;    wxBoxSizer* bSizer1;    bSizer1 = new wxBoxSizer( wxVERTICAL );    m_institution = new CTransparentStaticText( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0 );    bSizer1->Add( m_institution, 0, 0, 0 );    m_scienceArea = new CTransparentStaticText( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, 0 );    bSizer1->Add( m_scienceArea, 0, 0, 0 );        bSizer1->AddSpacer(DESCRIPTIONSPACER);    m_description = new CScrolledTextBox( this );    GetSize(&w, &h);    m_description->SetMinSize(wxSize(w, h - (2 * GetCharHeight()) - DESCRIPTIONSPACER));    bSizer1->Add( m_description, 1, wxEXPAND, 0 );    this->SetSizer( bSizer1 );    this->Layout();    m_SlideBitmap = wxNullBitmap;    m_bCurrentSlideIsDefault = false;    m_bGotAllProjectsList = false;#ifdef __WXMAC__    // Tell accessibility aids to ignore this panel (but not its contents)    HIObjectSetAccessibilityIgnored((HIObjectRef)GetHandle(), true);#endif        m_ChangeSlideTimer = new wxTimer(this, ID_CHANGE_SLIDE_TIMER);    m_ChangeSlideTimer->Start(10000);}

// This is a helper for all wxControls made with UPDOWN native control.// In wxMSW it was only wxSpinCtrl derived from wxSpinButton but in// WinCE of Smartphones this happens also for native wxTextCtrl,// wxChoice and others.wxSize wxControl::GetBestSpinnerSize(const bool is_vertical) const{    // take size according to layout    wxSize bestSize(#if defined(__SMARTPHONE__) && defined(__WXWINCE__)                    0,GetCharHeight()#else                    ::GetSystemMetrics(is_vertical ? SM_CXVSCROLL : SM_CXHSCROLL),                    ::GetSystemMetrics(is_vertical ? SM_CYVSCROLL : SM_CYHSCROLL)#endif    );    // correct size as for undocumented MSW variants cases (WinCE and perhaps others)    if (bestSize.x==0)        bestSize.x = bestSize.y;    if (bestSize.y==0)        bestSize.y = bestSize.x;    // double size according to layout    if (is_vertical)        bestSize.y *= 2;    else        bestSize.x *= 2;    return bestSize;}

wxSize wxDatePickerCtrl::DoGetBestSize() const{    const int y = GetCharHeight();    wxSize best(DEFAULT_ITEM_WIDTH, EDIT_HEIGHT_FROM_CHAR_HEIGHT(y));    CacheBestSize(best);    return best;}

void WindowScrollDown (PCONINFO con, int scroll, int color){    RECT rcScroll;    if ((con->ymin != 0)            || (con->dispxmax != con->xmax)            || (con->dispymax != con->ymax)) {        rcScroll.left = 0;        rcScroll.top  = 0;        rcScroll.right = con->xmax * GetCharWidth ();        rcScroll.bottom = con->ymax * GetCharHeight ();        ScrollWindow (con->hWnd, 0, scroll * GetCharHeight (),             &rcScroll, NULL);    }    else        ScrollWindow (con->hWnd, 0, scroll * GetCharHeight (), NULL, NULL);}

void ListBox::UpdateValues(){	Size newSize = Size(m_width, (m_charHeight + m_gapBetLines) * m_lineNbr + m_lineOffset.y * 2 - m_gapBetLines);	if (!IsSize(newSize))		SetSize(newSize);	for (uint8 i = 0; i < m_lineNbr; i++)	{		m_lines[i]->SetPosition(Point(m_lineOffset.x, (GetCharHeight() + m_gapBetLines) * i + m_lineOffset.y));		m_lines[i]->SetColor(GetColor());		m_lines[i]->SetCharHeight(GetCharHeight());		m_lines[i]->SetCharWidth(GetCharWidh());		m_lines[i]->SetCharInterval(GetCharInterval());		if (IsItalic())			m_lines[i]->SetItalic();		else m_lines[i]->RemoveItalic();	}}

void wxStatusBarGeneric::SetMinHeight(int height){    // check that this min height is not less than minimal height for the    // current font (min height is as calculated above in Create() except for border)    int minHeight = (int)((11*GetCharHeight())/10);    if ( height > minHeight )        SetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, height + 2*m_borderY);}

wxSize wxBitmapComboBox::DoGetBestSize() const{    wxSize best = wxComboBox::DoGetBestSize();    int delta = GetBitmapSize().y - GetCharHeight();    if ( delta > 0 )        best.y += delta;    return best;}

void CScrolledTextBox::OnOutputLine(const wxString& line) {    if ( !line.empty() ) {        m_TextSizer->Add(new CTransparentStaticText(this, wxID_ANY, line));    } else { // empty line, no need to create a control for it        if ( !m_hLine ) {            m_hLine = GetCharHeight();        }        m_TextSizer->Add(5, m_hLine);    }}

void HandleMouseLeftUpWhenCaptured (PCONINFO con, int x, int y, WPARAM wParam){    x /= GetCharWidth ();    y /= GetCharHeight ();    TextCopy (con, con->m_origx, con->m_origy, x, y);    con->m_oldx = x;    con->m_oldy = y;}