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// ============================================================================
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// ============================================================================
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#include "wx/dcclient.h"
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#include "wx/dcmemory.h"
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#include "wx/gizmos/ledctrl.h"
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// A LED digit is build up like this, with maximum 7 Lines :
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// Each number contains combinations of the lines, and they are set up below.
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const int DECIMALSIGN = 128;
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const int DIGIT0 = LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6;
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const int DIGIT1 = LINE2 | LINE3;
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const int DIGIT2 = LINE1 | LINE2 | LINE4 | LINE5 | LINE7;
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const int DIGIT3 = LINE1 | LINE2 | LINE3 | LINE4 | LINE7;
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const int DIGIT4 = LINE2 | LINE3 | LINE6 | LINE7;
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const int DIGIT5 = LINE1 | LINE3 | LINE4 | LINE6 | LINE7;
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const int DIGIT6 = LINE1 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7;
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const int DIGIT7 = LINE1 | LINE2 | LINE3;
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const int DIGIT8 = LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7;
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const int DIGIT9 = LINE1 | LINE2 | LINE3 | LINE6 | LINE7;
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const int DASH = LINE7;
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const int DIGITALL = -1;
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// ============================================================================
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// wxLEDNumberCtrl class implementation
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// ============================================================================
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wxLEDNumberCtrl::wxLEDNumberCtrl()
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: m_Alignment(wxLED_ALIGN_LEFT),
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wxLEDNumberCtrl::wxLEDNumberCtrl(wxWindow *parent, wxWindowID id,
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const wxPoint& pos, const wxSize& size,
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: m_Alignment(wxLED_ALIGN_LEFT),
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Create(parent, id, pos, size, style);
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bool wxLEDNumberCtrl::Create(wxWindow *parent, wxWindowID id,
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const wxPoint& pos, const wxSize& size,
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bool RetVal = wxControl::Create(parent, id, pos, size, style);
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if ((style & wxLED_DRAW_FADED) != 0)
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if ((style & wxLED_ALIGN_MASK) != 0)
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SetAlignment((wxLEDValueAlign)(style & wxLED_ALIGN_MASK));
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SetBackgroundColour(*wxBLACK);
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SetForegroundColour(*wxGREEN);
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void wxLEDNumberCtrl::SetAlignment(wxLEDValueAlign Alignment, bool Redraw)
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if (Alignment != m_Alignment)
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m_Alignment = Alignment;
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RecalcInternals(GetClientSize());
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void wxLEDNumberCtrl::SetDrawFaded(bool DrawFaded, bool Redraw)
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if (DrawFaded != m_DrawFaded)
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m_DrawFaded = DrawFaded;
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void wxLEDNumberCtrl::SetValue(wxString const &Value, bool Redraw)
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if (Value != m_Value)
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for(size_t i=0; i<Value.Length(); i++) {
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wxChar ch = Value[i];
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wxASSERT_MSG((ch>='0' && ch<='9') || ch=='-' || ch==' ' || ch=='.',
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wxT("wxLEDNumberCtrl can only display numeric string values."));
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RecalcInternals(GetClientSize());
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BEGIN_EVENT_TABLE(wxLEDNumberCtrl, wxControl)
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EVT_ERASE_BACKGROUND(wxLEDNumberCtrl::OnEraseBackground)
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EVT_PAINT(wxLEDNumberCtrl::OnPaint)
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EVT_SIZE(wxLEDNumberCtrl::OnSize)
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void wxLEDNumberCtrl::OnEraseBackground(wxEraseEvent &WXUNUSED(event))
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void wxLEDNumberCtrl::OnPaint(wxPaintEvent &WXUNUSED(event))
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GetClientSize(&Width, &Height);
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wxBitmap *pMemoryBitmap = new wxBitmap(Width, Height);
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MemDc.SelectObject(*pMemoryBitmap);
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MemDc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
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MemDc.DrawRectangle(wxRect(0, 0, Width, Height));
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MemDc.SetBrush(wxNullBrush);
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// Iterate each digit in the value, and draw.
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const int DigitCount = m_Value.Len();
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for (int offset=0, i = 0; offset < DigitCount; ++offset, ++i)
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wxChar c = m_Value.GetChar(offset);
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// Draw faded lines if wanted.
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if (m_DrawFaded && (c != _T('.')))
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DrawDigit(MemDc, DIGITALL, i);
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DrawDigit(MemDc, DIGIT0, i);
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DrawDigit(MemDc, DIGIT1, i);
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DrawDigit(MemDc, DIGIT2, i);
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DrawDigit(MemDc, DIGIT3, i);
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DrawDigit(MemDc, DIGIT4, i);
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DrawDigit(MemDc, DIGIT5, i);
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DrawDigit(MemDc, DIGIT6, i);
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DrawDigit(MemDc, DIGIT7, i);
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DrawDigit(MemDc, DIGIT8, i);
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DrawDigit(MemDc, DIGIT9, i);
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DrawDigit(MemDc, DASH, i);
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// Display the decimal in the previous segment
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DrawDigit(MemDc, DECIMALSIGN, i);
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wxFAIL_MSG(wxT("Unknown digit value"));
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// Blit the memory dc to screen.
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Dc.Blit(0, 0, Width, Height, &MemDc, 0, 0, wxCOPY);
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delete pMemoryBitmap;
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void wxLEDNumberCtrl::DrawDigit(wxDC &Dc, int Digit, int Column)
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wxColour LineColor(GetForegroundColour());
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if (Digit == DIGITALL)
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const unsigned char R = (unsigned char)(LineColor.Red() / 16);
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const unsigned char G = (unsigned char)(LineColor.Green() / 16);
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const unsigned char B = (unsigned char)(LineColor.Blue() / 16);
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LineColor.Set(R, G, B);
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int XPos = m_LeftStartPos + Column * (m_LineLength + m_DigitMargin);
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// Create a pen and draw the lines.
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wxPen Pen(LineColor, m_LineWidth, wxSOLID);
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Dc.DrawLine(XPos + m_LineMargin*2, m_LineMargin,
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XPos + m_LineLength + m_LineMargin*2, m_LineMargin);
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Dc.DrawLine(XPos + m_LineLength + m_LineMargin*3, m_LineMargin*2,
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XPos + m_LineLength + m_LineMargin*3, m_LineLength + (m_LineMargin*2));
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Dc.DrawLine(XPos + m_LineLength + m_LineMargin*3, m_LineLength + (m_LineMargin*4),
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XPos + m_LineLength + m_LineMargin*3, m_LineLength*2 + (m_LineMargin*4));
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Dc.DrawLine(XPos + m_LineMargin*2, m_LineLength*2 + (m_LineMargin*5),
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XPos + m_LineLength + m_LineMargin*2, m_LineLength*2 + (m_LineMargin*5));
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Dc.DrawLine(XPos + m_LineMargin, m_LineLength + (m_LineMargin*4),
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XPos + m_LineMargin, m_LineLength*2 + (m_LineMargin*4));
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Dc.DrawLine(XPos + m_LineMargin, m_LineMargin*2,
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XPos + m_LineMargin, m_LineLength + (m_LineMargin*2));
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Dc.DrawLine(XPos + m_LineMargin*2, m_LineLength + (m_LineMargin*3),
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XPos + m_LineMargin*2 + m_LineLength, m_LineLength + (m_LineMargin*3));
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if (Digit & DECIMALSIGN)
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Dc.DrawLine(XPos + m_LineLength + m_LineMargin*4, m_LineLength*2 + (m_LineMargin*5),
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XPos + m_LineLength + m_LineMargin*4, m_LineLength*2 + (m_LineMargin*5));
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Dc.SetPen(wxNullPen);
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void wxLEDNumberCtrl::RecalcInternals(const wxSize &CurrentSize)
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// Dimensions of LED segments
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// Size of character is based on the HEIGH of the widget, NOT the width.
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// Segment height is calculated as follows:
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// Each segment is m_LineLength pixels long.
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// There is m_LineMargin pixels at the top and bottom of each line segment
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// There is m_LineMargin pixels at the top and bottom of each digit
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// Therefore, the heigth of each character is:
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// m_LineMargin : Top digit boarder
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// m_LineMargin+m_LineLength+m_LineMargin : Top half of segment
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// m_LineMargin+m_LineLength+m_LineMargin : Bottom half of segment
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// m_LineMargin : Bottom digit boarder
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// ----------------------
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// m_LineMargin*6 + m_LineLength*2 == Total height of digit.
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// Therefore, (m_LineMargin*6 + m_LineLength*2) must equal Height
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// Spacing between characters can then be calculated as follows:
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// m_LineMargin : before the digit,
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// m_LineMargin+m_LineLength+m_LineMargin : for the digit width
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// m_LineMargin : after the digit
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// = m_LineMargin*4 + m_LineLength
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const int Height = CurrentSize.GetHeight();
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if ((Height * 0.075) < 1)
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m_LineMargin = (int)(Height * 0.075);
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if ((Height * 0.275) < 1)
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m_LineLength = (int)(Height * 0.275);
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m_LineWidth = m_LineMargin;
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m_DigitMargin = m_LineMargin * 4;
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// Count the number of characters in the string; '.' characters are not
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// included because they do not take up space in the display
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for (unsigned int i = 0; i < m_Value.Len(); i++)
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if (m_Value.GetChar(i) != '.')
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const int ValueWidth = (m_LineLength + m_DigitMargin) * count;
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const int ClientWidth = CurrentSize.GetWidth();
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case wxLED_ALIGN_LEFT :
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m_LeftStartPos = m_LineMargin;
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case wxLED_ALIGN_RIGHT :
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m_LeftStartPos = ClientWidth - ValueWidth - m_LineMargin;
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//case wxLED_ALIGN_CENTER : // fall-through
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case wxLED_ALIGN_MASK :
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m_LeftStartPos = (ClientWidth - ValueWidth) / 2;
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wxFAIL_MSG(wxT("Unknown alignent value for wxLEDNumberCtrl."));
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void wxLEDNumberCtrl::OnSize(wxSizeEvent &Event)
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RecalcInternals(Event.GetSize());