contrib/src/gizmos/ledctrl.cpp

   1 // ============================================================================
   2 // headers
   3 // ============================================================================
   4
   5 #ifdef __GNUG__
   6     #pragma  implementation "wxLEDNumberCtrl.h"
   7 #endif
   8
   9 #include "wx/wxprec.h"
  10
  11 #ifdef __BORLANDC__
  12     #pragma hdrstop
  13 #endif  //__BORLANDC__
  14
  15 #ifndef WX_PRECOMP
  16     #include "wx/dcclient.h"
  17     #include "wx/dcmemory.h"
  18     #include "wx/intl.h"
  19 #endif
  20
  21 #include "wx/gizmos/ledctrl.h"
  22
  23 // ----------------------------------------------------------------------------
  24 // constants
  25 // ----------------------------------------------------------------------------
  26
  27 // A LED digit is build up like this, with maximum 7 Lines :
  28 //
  29 // 111
  30 // 6 2
  31 // 777
  32 // 5 3
  33 // 444
  34 //
  35 // Each number contains combinations of the lines, and they are set up below.
  36
  37 const int LINE1 = 1;
  38 const int LINE2 = 2;
  39 const int LINE3 = 4;
  40 const int LINE4 = 8;
  41 const int LINE5 = 16;
  42 const int LINE6 = 32;
  43 const int LINE7 = 64;
  44 const int DECIMALSIGN = 128;
  45
  46 const int DIGIT0 = LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6;
  47 const int DIGIT1 = LINE2 | LINE3;
  48 const int DIGIT2 = LINE1 | LINE2 | LINE4 | LINE5 | LINE7;
  49 const int DIGIT3 = LINE1 | LINE2 | LINE3 | LINE4 | LINE7;
  50 const int DIGIT4 = LINE2 | LINE3 | LINE6 | LINE7;
  51 const int DIGIT5 = LINE1 | LINE3 | LINE4 | LINE6 | LINE7;
  52 const int DIGIT6 = LINE1 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7;
  53 const int DIGIT7 = LINE1 | LINE2 | LINE3;
  54 const int DIGIT8 = LINE1 | LINE2 | LINE3 | LINE4 | LINE5 | LINE6 | LINE7;
  55 const int DIGIT9 = LINE1 | LINE2 | LINE3 | LINE6 | LINE7;
  56 const int DASH   = LINE7;
  57
  58 const int DIGITALL = -1;
  59
  60 // ============================================================================
  61 // wxLEDNumberCtrl class implementation
  62 // ============================================================================
  63
  64 wxLEDNumberCtrl::wxLEDNumberCtrl()
  65 :   m_Alignment(wxLED_ALIGN_LEFT),
  66     m_LineMargin(-1),
  67     m_DigitMargin(-1),
  68     m_LineLength(-1),
  69     m_LineWidth(-1),
  70     m_DrawFaded(false),
  71     m_LeftStartPos(-1)
  72 {
  73 }
  74
  75
  76 wxLEDNumberCtrl::wxLEDNumberCtrl(wxWindow *parent, wxWindowID id,
  77                                  const wxPoint& pos, const wxSize& size,
  78                                  long style)
  79 :   m_Alignment(wxLED_ALIGN_LEFT),
  80     m_LineMargin(-1),
  81     m_DigitMargin(-1),
  82     m_LineLength(-1),
  83     m_LineWidth(-1),
  84     m_DrawFaded(false),
  85     m_LeftStartPos(-1)
  86 {
  87     Create(parent, id, pos, size, style);
  88 }
  89
  90
  91 bool wxLEDNumberCtrl::Create(wxWindow *parent, wxWindowID id,
  92                                  const wxPoint& pos, const wxSize& size,
  93                                  long style)
  94 {
  95     bool RetVal = wxControl::Create(parent, id, pos, size, style);
  96
  97     if ((style & wxLED_DRAW_FADED) != 0)
  98         SetDrawFaded(true);
  99     if ((style & wxLED_ALIGN_MASK) != 0)
 100         SetAlignment((wxLEDValueAlign)(style & wxLED_ALIGN_MASK));
 101
 102     SetBackgroundColour(*wxBLACK);
 103     SetForegroundColour(*wxGREEN);
 104
 105     return RetVal;
 106 }
 107
 108
 109 void wxLEDNumberCtrl::SetAlignment(wxLEDValueAlign Alignment, bool Redraw)
 110 {
 111     if (Alignment != m_Alignment)
 112     {
 113         m_Alignment = Alignment;
 114         RecalcInternals(GetClientSize());
 115
 116         if (Redraw)
 117             Refresh(false);
 118     }
 119 }
 120
 121
 122 void wxLEDNumberCtrl::SetDrawFaded(bool DrawFaded, bool Redraw)
 123 {
 124     if (DrawFaded != m_DrawFaded)
 125     {
 126         m_DrawFaded = DrawFaded;
 127
 128         if (Redraw)
 129             Refresh(false);
 130     }
 131 }
 132
 133
 134 void wxLEDNumberCtrl::SetValue(wxString const &Value, bool Redraw)
 135 {
 136     if (Value != m_Value)
 137     {
 138 #ifdef __WXDEBUG__
 139         if (!Value.empty())
 140         {
 141             for(size_t i=0; i<Value.Length(); i++) {
 142                 wxChar ch = Value[i];
 143                 wxASSERT_MSG((ch>='0' && ch<='9') || ch=='-' || ch==' ' || ch=='.',
 144                              wxT("wxLEDNumberCtrl can only display numeric string values."));
 145             }
 146         }
 147 #endif
 148
 149         m_Value = Value;
 150         RecalcInternals(GetClientSize());
 151
 152         if (Redraw)
 153             Refresh(false);
 154     }
 155 }
 156
 157
 158 BEGIN_EVENT_TABLE(wxLEDNumberCtrl, wxControl)
 159     EVT_ERASE_BACKGROUND(wxLEDNumberCtrl::OnEraseBackground)
 160     EVT_PAINT(wxLEDNumberCtrl::OnPaint)
 161     EVT_SIZE(wxLEDNumberCtrl::OnSize)
 162 END_EVENT_TABLE()
 163
 164
 165 void wxLEDNumberCtrl::OnEraseBackground(wxEraseEvent &WXUNUSED(event))
 166 {
 167 }
 168
 169
 170 void wxLEDNumberCtrl::OnPaint(wxPaintEvent &WXUNUSED(event))
 171 {
 172     wxPaintDC Dc(this);
 173
 174     int Width, Height;
 175     GetClientSize(&Width, &Height);
 176
 177     wxBitmap *pMemoryBitmap = new wxBitmap(Width, Height);
 178     wxMemoryDC MemDc;
 179
 180     MemDc.SelectObject(*pMemoryBitmap);
 181     MemDc.BeginDrawing();
 182
 183     // Draw background.
 184     MemDc.SetBrush(wxBrush(GetBackgroundColour(), wxSOLID));
 185     MemDc.DrawRectangle(wxRect(0, 0, Width, Height));
 186     MemDc.SetBrush(wxNullBrush);
 187
 188     // Iterate each digit in the value, and draw.
 189     const int DigitCount = m_Value.Len();
 190     for (int offset=0, i = 0; offset < DigitCount; ++offset, ++i)
 191     {
 192         wxChar c = m_Value.GetChar(offset);
 193
 194         // Draw faded lines if wanted.
 195         if (m_DrawFaded && (c != _T('.')))
 196             DrawDigit(MemDc, DIGITALL, i);
 197
 198         // Draw the digits.
 199         switch (c)
 200         {
 201             case _T('0') :
 202                 DrawDigit(MemDc, DIGIT0, i);
 203                 break;
 204             case _T('1') :
 205                 DrawDigit(MemDc, DIGIT1, i);
 206                 break;
 207             case _T('2') :
 208                 DrawDigit(MemDc, DIGIT2, i);
 209                 break;
 210             case _T('3') :
 211                 DrawDigit(MemDc, DIGIT3, i);
 212                 break;
 213             case _T('4') :
 214                 DrawDigit(MemDc, DIGIT4, i);
 215                 break;
 216             case _T('5') :
 217                 DrawDigit(MemDc, DIGIT5, i);
 218                 break;
 219             case _T('6') :
 220                 DrawDigit(MemDc, DIGIT6, i);
 221                 break;
 222             case _T('7') :
 223                 DrawDigit(MemDc, DIGIT7, i);
 224                 break;
 225             case _T('8') :
 226                 DrawDigit(MemDc, DIGIT8, i);
 227                 break;
 228             case _T('9') :
 229                 DrawDigit(MemDc, DIGIT9, i);
 230                 break;
 231             case _T('-') :
 232                 DrawDigit(MemDc, DASH, i);
 233                 break;
 234             case _T('.') :
 235                 // Display the decimal in the previous segment
 236                 i--;
 237                 DrawDigit(MemDc, DECIMALSIGN, i);
 238                 break;
 239             case _T(' ') :
 240                 // just skip it
 241                 break;
 242             default :
 243                 wxFAIL_MSG(wxT("Unknown digit value"));
 244                 break;
 245         }
 246     }
 247
 248     MemDc.EndDrawing();
 249
 250     // Blit the memory dc to screen.
 251     Dc.Blit(0, 0, Width, Height, &MemDc, 0, 0, wxCOPY);
 252     delete pMemoryBitmap;
 253 }
 254
 255
 256 void wxLEDNumberCtrl::DrawDigit(wxDC &Dc, int Digit, int Column)
 257 {
 258     wxColour LineColor(GetForegroundColour());
 259
 260     if (Digit == DIGITALL)
 261     {
 262         const unsigned char R = (unsigned char)(LineColor.Red() / 16);
 263         const unsigned char G = (unsigned char)(LineColor.Green() / 16);
 264         const unsigned char B = (unsigned char)(LineColor.Blue() / 16);
 265
 266         LineColor.Set(R, G, B);
 267     }
 268
 269     int XPos = m_LeftStartPos + Column * (m_LineLength + m_DigitMargin);
 270
 271     // Create a pen and draw the lines.
 272     wxPen Pen(LineColor, m_LineWidth, wxSOLID);
 273     Dc.SetPen(Pen);
 274
 275     if ((Digit & LINE1))
 276     {
 277         Dc.DrawLine(XPos + m_LineMargin*2, m_LineMargin,
 278             XPos + m_LineLength + m_LineMargin*2, m_LineMargin);
 279     }
 280
 281     if (Digit & LINE2)
 282     {
 283         Dc.DrawLine(XPos + m_LineLength + m_LineMargin*3, m_LineMargin*2,
 284             XPos + m_LineLength + m_LineMargin*3, m_LineLength + (m_LineMargin*2));
 285     }
 286
 287     if (Digit & LINE3)
 288     {
 289         Dc.DrawLine(XPos + m_LineLength + m_LineMargin*3, m_LineLength + (m_LineMargin*4),
 290             XPos + m_LineLength + m_LineMargin*3, m_LineLength*2 + (m_LineMargin*4));
 291     }
 292
 293     if (Digit & LINE4)
 294     {
 295         Dc.DrawLine(XPos + m_LineMargin*2, m_LineLength*2 + (m_LineMargin*5),
 296             XPos + m_LineLength + m_LineMargin*2, m_LineLength*2 + (m_LineMargin*5));
 297     }
 298
 299     if (Digit & LINE5)
 300     {
 301         Dc.DrawLine(XPos + m_LineMargin, m_LineLength + (m_LineMargin*4),
 302             XPos + m_LineMargin, m_LineLength*2 + (m_LineMargin*4));
 303     }
 304
 305     if (Digit & LINE6)
 306     {
 307         Dc.DrawLine(XPos + m_LineMargin, m_LineMargin*2,
 308             XPos + m_LineMargin, m_LineLength + (m_LineMargin*2));
 309     }
 310
 311     if (Digit & LINE7)
 312     {
 313         Dc.DrawLine(XPos + m_LineMargin*2, m_LineLength + (m_LineMargin*3),
 314             XPos + m_LineMargin*2 + m_LineLength, m_LineLength + (m_LineMargin*3));
 315     }
 316
 317     if (Digit & DECIMALSIGN)
 318     {
 319         Dc.DrawLine(XPos + m_LineLength + m_LineMargin*4, m_LineLength*2 + (m_LineMargin*5),
 320             XPos + m_LineLength + m_LineMargin*4, m_LineLength*2 + (m_LineMargin*5));
 321     }
 322
 323     Dc.SetPen(wxNullPen);
 324 }
 325
 326
 327 void wxLEDNumberCtrl::RecalcInternals(const wxSize &CurrentSize)
 328 {
 329     // Dimensions of LED segments
 330     //
 331     // Size of character is based on the HEIGH of the widget, NOT the width.
 332     // Segment height is calculated as follows:
 333     // Each segment is m_LineLength pixels long.
 334     // There is m_LineMargin pixels at the top and bottom of each line segment
 335     // There is m_LineMargin pixels at the top and bottom of each digit
 336     //
 337     //  Therefore, the heigth of each character is:
 338     //  m_LineMargin                            : Top digit boarder
 339     //  m_LineMargin+m_LineLength+m_LineMargin  : Top half of segment
 340     //  m_LineMargin+m_LineLength+m_LineMargin  : Bottom half of segment
 341     //  m_LineMargin                            : Bottom digit boarder
 342     //  ----------------------
 343     //  m_LineMargin*6 + m_LineLength*2 == Total height of digit.
 344     //  Therefore, (m_LineMargin*6 + m_LineLength*2) must equal Height
 345     //
 346     //  Spacing between characters can then be calculated as follows:
 347     //  m_LineMargin                            : before the digit,
 348     //  m_LineMargin+m_LineLength+m_LineMargin  : for the digit width
 349     //  m_LineMargin                            : after the digit
 350     //  = m_LineMargin*4 + m_LineLength
 351     const int Height = CurrentSize.GetHeight();
 352
 353     if ((Height * 0.075) < 1)
 354         m_LineMargin = 1;
 355     else
 356         m_LineMargin = (int)(Height * 0.075);
 357
 358     if ((Height * 0.275) < 1)
 359         m_LineLength = 1;
 360     else
 361         m_LineLength = (int)(Height * 0.275);
 362
 363     m_LineWidth = m_LineMargin;
 364
 365     m_DigitMargin = m_LineMargin * 4;
 366
 367     // Count the number of characters in the string; '.' characters are not
 368     // included because they do not take up space in the display
 369     int count = 0;
 370     for (unsigned int i = 0; i < m_Value.Len(); i++)
 371         if (m_Value.GetChar(i) != '.')
 372             count++;
 373     const int ValueWidth = (m_LineLength + m_DigitMargin) * count;
 374     const int ClientWidth = CurrentSize.GetWidth();
 375
 376     switch (m_Alignment)
 377     {
 378         case wxLED_ALIGN_LEFT :
 379             m_LeftStartPos = m_LineMargin;
 380             break;
 381         case wxLED_ALIGN_RIGHT :
 382             m_LeftStartPos = ClientWidth - ValueWidth - m_LineMargin;
 383             break;
 384         case wxLED_ALIGN_CENTER :
 385             m_LeftStartPos = (ClientWidth - ValueWidth) / 2;
 386             break;
 387         default :
 388             wxFAIL_MSG(wxT("Unknown alignent value for wxLEDNumberCtrl."));
 389             break;
 390     }
 391 }
 392
 393
 394 void wxLEDNumberCtrl::OnSize(wxSizeEvent &Event)
 395 {
 396     RecalcInternals(Event.GetSize());
 397
 398     Event.Skip();
 399 }