C++ wxGetCharSize函数代码示例

wxSize wxToggleButton::DoGetBestSize() const
{
   wxString                         label = wxGetWindowText(GetHWND());
   int                              wBtn;
   wxFont                           vFont =  GetFont();
   int                              wChar;
   int                              hChar;

   GetTextExtent(label, &wBtn, NULL);


   wxGetCharSize(GetHWND(), &wChar, &hChar, &vFont);

   // add a margin - the button is wider than just its label
   wBtn += 3*wChar;

   // the button height is proportional to the height of the font used
   int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);

#if wxUSE_BUTTON
   wxSize sz = wxButton::GetDefaultSize();
   if (wBtn > sz.x)
       sz.x = wBtn;
   if (hBtn > sz.y)
       sz.y = hBtn;
#else
   wxSize sz(wBtn, hBtn);
#endif

   return sz;
}

wxSize wxStaticBox::DoGetBestSize() const
{
    wxSize best;

    // Calculate the size needed by the label
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, GetFont());

    int wBox;
    GetTextExtent(GetLabelText(wxGetWindowText(m_hWnd)), &wBox, &cy);

    wBox += 3*cx;
    int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);

    // If there is a sizer then the base best size is the sizer's minimum
    if (GetSizer() != NULL)
    {
        wxSize cm(GetSizer()->CalcMin());
        best = ClientToWindowSize(cm);
        // adjust for a long label if needed
        best.x = wxMax(best.x, wBox);
    }
    // otherwise the best size falls back to the label size
    else
    {
        best = wxSize(wBox, hBox);
    }
    return best;
}

int wxChoice::SetHeightSimpleComboBox(int nItems) const
{
    int cx, cy;
    wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
    int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
    return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
}

wxSize wxToggleButton::DoGetBestSize() const
{
   wxString label = wxGetWindowText(GetHWND());
   int wBtn;
   GetTextExtent(GetLabelText(label), &wBtn, NULL);

   int wChar, hChar;
   wxGetCharSize(GetHWND(), &wChar, &hChar, GetFont());

   // add a margin - the button is wider than just its label
   wBtn += 3*wChar;

   // the button height is proportional to the height of the font used
   int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);

#if wxUSE_BUTTON
   // make all buttons of at least standard size unless wxBU_EXACTFIT is given
   if ( !HasFlag(wxBU_EXACTFIT) )
   {
       const wxSize szMin = wxButton::GetDefaultSize();
       if ( wBtn < szMin.x )
           wBtn = szMin.x;
       if ( hBtn < szMin.y )
           hBtn = szMin.y;
   }
#endif // wxUSE_BUTTON

   wxSize sz(wBtn, hBtn);

   CacheBestSize(sz);
   return sz;
}

wxSize wxChoice::DoGetBestSize() const
{
    //
    // Find the widest string
    //
    int                             nLineWidth;
    int                             nChoiceWidth = 0;
    int                             nItems = GetCount();
    int                             nCx;
    int                             nCy;
    wxFont                          vFont = (wxFont)GetFont();

    for (int i = 0; i < nItems; i++)
    {
        wxString                    sStr(GetString(i));

        GetTextExtent( sStr
                      ,&nLineWidth
                      ,NULL
                     );
        if (nLineWidth > nChoiceWidth)
            nChoiceWidth = nLineWidth;
    }

    //
    // Give it some reasonable default value if there are no strings in the
    // list
    //
    if (nChoiceWidth == 0L)
        nChoiceWidth = 100L;

    //
    // The combobox should be larger than the widest string
    //
    wxGetCharSize( GetHWND()
                  ,&nCx
                  ,&nCy
                  ,&vFont
                 );
    nChoiceWidth += 5 * nCx;

    //
    // Choice drop-down list depends on number of items (limited to 10)
    //
    size_t                          nStrings = nItems == 0 ? 10 : wxMin(10, nItems) + 1;
    int                             nChoiceHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * nStrings;

    return wxSize( nChoiceWidth
                  ,nChoiceHeight
                 );
} // end of wxChoice::DoGetBestSize

wxSize wxStaticBox::DoGetBestSize() const
{
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, GetFont());

    int wBox;
    GetTextExtent(GetLabelText(wxGetWindowText(m_hWnd)), &wBox, &cy);

    wBox += 3*cx;
    int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);

    wxSize best(wBox, hBox);
    CacheBestSize(best);
    return best;
}

wxSize wxButton::DoGetBestSize() const
{
    wxString                        rsLabel = wxGetWindowText(GetHWND());
    int                             nWidthButton;
    int                             nWidthChar;
    int                             nHeightChar;
    wxFont                          vFont = (wxFont)GetFont();

    GetTextExtent( rsLabel
                  ,&nWidthButton
                  ,NULL
                 );

    wxGetCharSize( GetHWND()
                  ,&nWidthChar
                  ,&nHeightChar
                  ,&vFont
                 );

    //
    // Add a margin - the button is wider than just its label
    //
    nWidthButton += 3 * nWidthChar;

    //
    // The button height is proportional to the height of the font used
    //
    int                             nHeightButton = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(nHeightChar);

    //
    // Need a little extra to make it look right
    //
    nHeightButton += (int)(nHeightChar/1.5);

    if (!HasFlag(wxBU_EXACTFIT))
    {
        wxSize                      vSize = GetDefaultSize();

        if (nWidthButton > vSize.x)
            vSize.x = nWidthButton;
        if (nHeightButton > vSize.y)
            vSize.y = nHeightButton;
        return vSize;
    }
    return wxSize( nWidthButton
                  ,nHeightButton
                 );
} // end of wxButton::DoGetBestSize

wxSize wxListBox::DoGetBestSize() const
{
    //
    // Find the widest string
    //
    int                             nLine;
    int                             nListbox = 0;
    int                             nCx;
    int                             nCy;
    wxFont                          vFont = (wxFont)GetFont();

    for (int i = 0; i < m_nNumItems; i++)
    {
        wxString                    vStr(GetString(i));

        GetTextExtent( vStr
                      ,&nLine
                      ,NULL
                     );
        if (nLine > nListbox)
            nListbox = nLine;
    }

    //
    // Give it some reasonable default value if there are no strings in the
    // list.
    //
    if (nListbox == 0)
        nListbox = 100;

    //
    // The listbox should be slightly larger than the widest string
    //
    wxGetCharSize( GetHWND()
                  ,&nCx
                  ,&nCy
                  ,&vFont
                 );
    nListbox += 3 * nCx;

    int                             hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * (wxMax(m_nNumItems, 7));

    return wxSize( nListbox
                  ,hListbox
                 );
} // end of wxListBox::DoGetBestSize

wxSize wxTextCtrl::DoGetBestSize() const
{
    int                             nCx;
    int                             nCy;
    wxFont                          vFont = (wxFont)GetFont();

    wxGetCharSize(GetHWND(), &nCx, &nCy, &vFont);

    int                             wText = DEFAULT_ITEM_WIDTH;
    int                             hText = (int)(EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * .8);

    if (m_windowStyle & wxTE_MULTILINE)
    {
        hText *= wxMax(GetNumberOfLines(), 5);
    }
    //else: for single line control everything is ok
    return wxSize(wText, hText);
} // end of wxTextCtrl::DoGetBestSize

wxSize wxSpinCtrl::DoGetSizeFromTextSize(int xlen, int ylen) const
{
    wxSize sizeBtn = wxSpinButton::DoGetBestSize();

    int y;
    wxGetCharSize(GetHWND(), NULL, &y, GetFont());
    // JACS: we should always use the height calculated
    // from above, because otherwise we'll get a spin control
    // that's too big. So never use the height calculated
    // from wxSpinButton::DoGetBestSize().

    wxSize tsize(xlen + sizeBtn.x + MARGIN_BETWEEN + 3*y/10 + 10,
                 EDIT_HEIGHT_FROM_CHAR_HEIGHT(y));

    // Check if the user requested a non-standard height.
    if ( ylen > 0 )
        tsize.IncBy(0, ylen - y);

    return tsize;
}

wxSize wxTextCtrl::DoGetBestSize() const
{
    int cx, cy;
    wxGetCharSize(GetBuddyHwnd(), &cx, &cy, GetFont());

    int wText = DEFAULT_ITEM_WIDTH;

    int hText = cy;
    if ( m_windowStyle & wxTE_MULTILINE )
    {
        hText *= wxMax(GetNumberOfLines(), 5);
    }
    //else: for single line control everything is ok

    // we have to add the adjustments for the control height only once, not
    // once per line, so do it after multiplication above
    hText += EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy) - cy;

    return wxSize(wText, hText);
}

wxSize wxSpinCtrl::DoGetBestSize() const
{
    wxSize sizeBtn = wxSpinButton::DoGetBestSize();
    sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;

    int y;
    wxGetCharSize(GetHWND(), NULL, &y, GetFont());
    y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);

    // JACS: we should always use the height calculated
    // from above, because otherwise we'll get a spin control
    // that's too big. So never use the height calculated
    // from wxSpinButton::DoGetBestSize().

    // if ( sizeBtn.y < y )
    {
        // make the text tall enough
        sizeBtn.y = y;
    }

    return sizeBtn;
}

wxSize wxRadioBox::GetTotalButtonSize(const wxSize& sizeBtn) const
{
    // the radiobox should be big enough for its buttons
    int cx1, cy1;
    wxGetCharSize(m_hWnd, &cx1, &cy1, GetFont());

    int extraHeight = cy1;

    int height = GetRowCount() * sizeBtn.y + cy1/2 + extraHeight;
    int width  = GetColumnCount() * (sizeBtn.x + cx1) + cx1;

    // Add extra space under the label, if it exists.
    if (!wxControl::GetLabel().empty())
        height += cy1/2;

    // and also wide enough for its label
    int widthLabel;
    GetTextExtent(GetLabelText(), &widthLabel, NULL);
    widthLabel += RADIO_SIZE; // FIXME this is bogus too
    if ( widthLabel > width )
        width = widthLabel;

    return wxSize(width, height);
}

wxSize wxSpinCtrl::DoGetBestSize() const
{
    wxSize                          vSizeBtn = wxSpinButton::DoGetBestSize();
    int                             nHeight;
    wxFont                          vFont = (wxFont)GetFont();

    vSizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;

    wxGetCharSize( GetHWND()
                  ,NULL
                  ,&nHeight
                  ,&vFont
                 );
    nHeight = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nHeight)+4;

    if (vSizeBtn.y < nHeight)
    {
        //
        // Make the text tall enough
        //
        vSizeBtn.y = nHeight;
    }
    return vSizeBtn;
} // end of wxSpinCtrl::DoGetBestSize

wxSize wxListBox::DoGetBestSize() const
{
    // find the widest string
    int wLine;
    int wListbox = 0;
    for (unsigned int i = 0; i < m_noItems; i++)
    {
        wxString str(GetString(i));
        GetTextExtent(str, &wLine, NULL);
        if ( wLine > wListbox )
            wListbox = wLine;
    }

    // give it some reasonable default value if there are no strings in the
    // list
    if ( wListbox == 0 )
        wListbox = 100;

    // the listbox should be slightly larger than the widest string
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, GetFont());

    wListbox += 3*cx;

    // Add room for the scrollbar
    wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);

    // don't make the listbox too tall (limit height to 10 items) but don't
    // make it too small neither
    int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*
                    wxMin(wxMax(m_noItems, 3), 10);

    wxSize best(wListbox, hListbox);
    CacheBestSize(best);
    return best;
}