reactos/subsys/system/taskmgr/graphctl.c

   1 /*
   2  *  ReactOS Task Manager
   3  *
   4  *  GraphCtrl.cpp
   5  *
   6  *  Copyright (C) 2002  Robert Dickenson <robd@reactos.org>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #include "precomp.h"
  24 #include <commctrl.h>
  25 #include <stdlib.h>
  26 #include <malloc.h>
  27 #include <memory.h>
  28 #include <tchar.h>
  29 #include <stdio.h>
  30
  31 #include <math.h>
  32 #include "graphctl.h"
  33
  34 LONG OldGraphCtrlWndProc;
  35
  36 static void GraphCtrl_Init(TGraphCtrl* this)
  37 {
  38     int i;
  39
  40     this->m_hWnd = 0;
  41     this->m_hParentWnd = 0;
  42     this->m_dcGrid = 0;
  43     this->m_dcPlot = 0;
  44     this->m_bitmapOldGrid = 0;
  45     this->m_bitmapOldPlot = 0;
  46     this->m_bitmapGrid = 0;
  47     this->m_bitmapPlot = 0;
  48     this->m_brushBack = 0;
  49
  50     this->m_penPlot[0] = 0;
  51     this->m_penPlot[1] = 0;
  52     this->m_penPlot[2] = 0;
  53     this->m_penPlot[3] = 0;
  54
  55     /* since plotting is based on a LineTo for each new point
  56      * we need a starting point (i.e. a "previous" point)
  57      * use 0.0 as the default first point.
  58      * these are public member variables, and can be changed outside
  59      * (after construction).  Therefore m_perviousPosition could be set to
  60      * a more appropriate value prior to the first call to SetPosition.
  61      */
  62     this->m_dPreviousPosition[0] = 0.0;
  63     this->m_dPreviousPosition[1] = 0.0;
  64     this->m_dPreviousPosition[2] = 0.0;
  65     this->m_dPreviousPosition[3] = 0.0;
  66
  67     /*  public variable for the number of decimal places on the y axis */
  68     this->m_nYDecimals = 3;
  69
  70     /*  set some initial values for the scaling until "SetRange" is called.
  71      *  these are protected varaibles and must be set with SetRange
  72      *  in order to ensure that m_dRange is updated accordingly
  73      */
  74     /*   m_dLowerLimit = -10.0; */
  75     /*   m_dUpperLimit =  10.0; */
  76     this->m_dLowerLimit = 0.0;
  77     this->m_dUpperLimit = 100.0;
  78     this->m_dRange      =  this->m_dUpperLimit - this->m_dLowerLimit;   /*  protected member variable */
  79
  80     /*  m_nShiftPixels determines how much the plot shifts (in terms of pixels)  */
  81     /*  with the addition of a new data point */
  82     this->m_nShiftPixels     = 4;
  83     this->m_nHalfShiftPixels = this->m_nShiftPixels/2;                     /*  protected */
  84     this->m_nPlotShiftPixels = this->m_nShiftPixels + this->m_nHalfShiftPixels;  /*  protected */
  85
  86     /*  background, grid and data colors */
  87     /*  these are public variables and can be set directly */
  88     this->m_crBackColor = RGB(  0,   0,   0);  /*  see also SetBackgroundColor */
  89     this->m_crGridColor = RGB(  0, 255, 255);  /*  see also SetGridColor */
  90     this->m_crPlotColor[0] = RGB(255, 255, 255);  /*  see also SetPlotColor */
  91     this->m_crPlotColor[1] = RGB(100, 255, 255);  /*  see also SetPlotColor */
  92     this->m_crPlotColor[2] = RGB(255, 100, 255);  /*  see also SetPlotColor */
  93     this->m_crPlotColor[3] = RGB(255, 255, 100);  /*  see also SetPlotColor */
  94
  95     /*  protected variables */
  96     for (i = 0; i < MAX_PLOTS; i++)
  97     {
  98         this->m_penPlot[i] = CreatePen(PS_SOLID, 0, this->m_crPlotColor[i]);
  99     }
 100     this->m_brushBack = CreateSolidBrush(this->m_crBackColor);
 101
 102     /*  public member variables, can be set directly  */
 103     strcpy(this->m_strXUnitsString, "Samples");  /*  can also be set with SetXUnits */
 104     strcpy(this->m_strYUnitsString, "Y units");  /*  can also be set with SetYUnits */
 105
 106     /*  protected bitmaps to restore the memory DC's */
 107     this->m_bitmapOldGrid = NULL;
 108     this->m_bitmapOldPlot = NULL;
 109 }
 110
 111 #if 0
 112 TGraphCtrl::~TGraphCtrl()
 113 {
 114     /*  just to be picky restore the bitmaps for the two memory dc's */
 115     /*  (these dc's are being destroyed so there shouldn't be any leaks) */
 116     if (m_bitmapOldGrid != NULL) SelectObject(m_dcGrid, m_bitmapOldGrid);
 117     if (m_bitmapOldPlot != NULL) SelectObject(m_dcPlot, m_bitmapOldPlot);
 118     if (m_bitmapGrid    != NULL) DeleteObject(m_bitmapGrid);
 119     if (m_bitmapPlot    != NULL) DeleteObject(m_bitmapPlot);
 120     if (m_dcGrid        != NULL) DeleteDC(m_dcGrid);
 121     if (m_dcPlot        != NULL) DeleteDC(m_dcPlot);
 122     if (m_brushBack     != NULL) DeleteObject(m_brushBack);
 123 }
 124 #endif
 125
 126 BOOL GraphCtrl_Create(TGraphCtrl* this, HWND hWnd, HWND hParentWnd, UINT nID)
 127 {
 128     BOOL result = 0;
 129
 130     GraphCtrl_Init(this);
 131     this->m_hParentWnd = hParentWnd;
 132     this->m_hWnd = hWnd;
 133     GraphCtrl_Resize(this);
 134     if (result != 0)
 135         GraphCtrl_InvalidateCtrl(this);
 136     return result;
 137 }
 138
 139 void GraphCtrl_SetRange(TGraphCtrl* this, double dLower, double dUpper, int nDecimalPlaces)
 140 {
 141     /* ASSERT(dUpper > dLower); */
 142     this->m_dLowerLimit     = dLower;
 143     this->m_dUpperLimit     = dUpper;
 144     this->m_nYDecimals      = nDecimalPlaces;
 145     this->m_dRange          = this->m_dUpperLimit - this->m_dLowerLimit;
 146     this->m_dVerticalFactor = (double)this->m_nPlotHeight / this->m_dRange;
 147     /*  clear out the existing garbage, re-start with a clean plot */
 148     GraphCtrl_InvalidateCtrl(this);
 149 }
 150
 151 #if 0
 152 void TGraphCtrl::SetXUnits(const char* string)
 153 {
 154     strncpy(m_strXUnitsString, string, sizeof(m_strXUnitsString) - 1);
 155     /*  clear out the existing garbage, re-start with a clean plot */
 156     InvalidateCtrl();
 157 }
 158
 159 void TGraphCtrl::SetYUnits(const char* string)
 160 {
 161     strncpy(m_strYUnitsString, string, sizeof(m_strYUnitsString) - 1);
 162     /*  clear out the existing garbage, re-start with a clean plot */
 163     InvalidateCtrl();
 164 }
 165 #endif
 166
 167 void GraphCtrl_SetGridColor(TGraphCtrl* this, COLORREF color)
 168 {
 169     this->m_crGridColor = color;
 170     /*  clear out the existing garbage, re-start with a clean plot */
 171     GraphCtrl_InvalidateCtrl(this);
 172 }
 173
 174 void GraphCtrl_SetPlotColor(TGraphCtrl* this, int plot, COLORREF color)
 175 {
 176     this->m_crPlotColor[plot] = color;
 177     DeleteObject(this->m_penPlot[plot]);
 178     this->m_penPlot[plot] = CreatePen(PS_SOLID, 0, this->m_crPlotColor[plot]);
 179     /*  clear out the existing garbage, re-start with a clean plot */
 180     GraphCtrl_InvalidateCtrl(this);
 181 }
 182
 183 void GraphCtrl_SetBackgroundColor(TGraphCtrl* this, COLORREF color)
 184 {
 185     this->m_crBackColor = color;
 186     DeleteObject(this->m_brushBack);
 187     this->m_brushBack = CreateSolidBrush(this->m_crBackColor);
 188     /*  clear out the existing garbage, re-start with a clean plot */
 189     GraphCtrl_InvalidateCtrl(this);
 190 }
 191
 192 void GraphCtrl_InvalidateCtrl(TGraphCtrl* this)
 193 {
 194     /*  There is a lot of drawing going on here - particularly in terms of  */
 195     /*  drawing the grid.  Don't panic, this is all being drawn (only once) */
 196     /*  to a bitmap.  The result is then BitBlt'd to the control whenever needed. */
 197     int i, j;
 198     int nCharacters;
 199     int nTopGridPix, nMidGridPix, nBottomGridPix;
 200
 201     HPEN oldPen;
 202     HPEN solidPen = CreatePen(PS_SOLID, 0, this->m_crGridColor);
 203     /* HFONT axisFont, yUnitFont, oldFont; */
 204     /* char strTemp[50]; */
 205
 206     /*  in case we haven't established the memory dc's */
 207     /* CClientDC dc(this); */
 208     HDC dc = GetDC(this->m_hParentWnd);
 209
 210     /*  if we don't have one yet, set up a memory dc for the grid */
 211     if (this->m_dcGrid == NULL)
 212     {
 213         this->m_dcGrid = CreateCompatibleDC(dc);
 214         this->m_bitmapGrid = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 215         this->m_bitmapOldGrid = (HBITMAP)SelectObject(this->m_dcGrid, this->m_bitmapGrid);
 216     }
 217
 218     SetBkColor(this->m_dcGrid, this->m_crBackColor);
 219
 220     /*  fill the grid background */
 221     FillRect(this->m_dcGrid, &this->m_rectClient, this->m_brushBack);
 222
 223     /*  draw the plot rectangle: */
 224     /*  determine how wide the y axis scaling values are */
 225     nCharacters = abs((int)log10(fabs(this->m_dUpperLimit)));
 226     nCharacters = max(nCharacters, abs((int)log10(fabs(this->m_dLowerLimit))));
 227
 228     /*  add the units digit, decimal point and a minus sign, and an extra space */
 229     /*  as well as the number of decimal places to display */
 230     nCharacters = nCharacters + 4 + this->m_nYDecimals;
 231
 232     /*  adjust the plot rectangle dimensions */
 233     /*  assume 6 pixels per character (this may need to be adjusted) */
 234     /*   m_rectPlot.left = m_rectClient.left + 6*(nCharacters); */
 235     this->m_rectPlot.left = this->m_rectClient.left;
 236     this->m_nPlotWidth    = this->m_rectPlot.right - this->m_rectPlot.left;/* m_rectPlot.Width(); */
 237
 238     /*  draw the plot rectangle */
 239     oldPen = (HPEN)SelectObject(this->m_dcGrid, solidPen);
 240     MoveToEx(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.top, NULL);
 241     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.top);
 242     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.bottom+1);
 243     LineTo(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.bottom+1);
 244     /*   LineTo(m_dcGrid, m_rectPlot.left, m_rectPlot.top); */
 245     SelectObject(this->m_dcGrid, oldPen);
 246     DeleteObject(solidPen);
 247
 248     /*  draw the dotted lines,
 249      *  use SetPixel instead of a dotted pen - this allows for a
 250      *  finer dotted line and a more "technical" look
 251      */
 252     nMidGridPix    = (this->m_rectPlot.top + this->m_rectPlot.bottom)/2;
 253     nTopGridPix    = nMidGridPix - this->m_nPlotHeight/4;
 254     nBottomGridPix = nMidGridPix + this->m_nPlotHeight/4;
 255
 256     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=2)
 257     {
 258         SetPixel(this->m_dcGrid, i, nTopGridPix,    this->m_crGridColor);
 259         SetPixel(this->m_dcGrid, i, nMidGridPix,    this->m_crGridColor);
 260         SetPixel(this->m_dcGrid, i, nBottomGridPix, this->m_crGridColor);
 261     }
 262
 263     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=10)
 264     {
 265         for (j=this->m_rectPlot.top; j<this->m_rectPlot.bottom; j+=2)
 266         {
 267             SetPixel(this->m_dcGrid, i, j, this->m_crGridColor);
 268             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 269             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 270         }
 271     }
 272
 273 #if 0
 274     /*  create some fonts (horizontal and vertical) */
 275     /*  use a height of 14 pixels and 300 weight  */
 276     /*  (these may need to be adjusted depending on the display) */
 277     axisFont = CreateFont (14, 0, 0, 0, 300,
 278                            FALSE, FALSE, 0, ANSI_CHARSET,
 279                            OUT_DEFAULT_PRECIS,
 280                            CLIP_DEFAULT_PRECIS,
 281                            DEFAULT_QUALITY,
 282                            DEFAULT_PITCH|FF_SWISS, "Arial");
 283     yUnitFont = CreateFont (14, 0, 900, 0, 300,
 284                             FALSE, FALSE, 0, ANSI_CHARSET,
 285                             OUT_DEFAULT_PRECIS,
 286                             CLIP_DEFAULT_PRECIS,
 287                             DEFAULT_QUALITY,
 288                             DEFAULT_PITCH|FF_SWISS, "Arial");
 289
 290     /*  grab the horizontal font */
 291     oldFont = (HFONT)SelectObject(m_dcGrid, axisFont);
 292
 293     /*  y max */
 294     SetTextColor(m_dcGrid, m_crGridColor);
 295     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 296     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dUpperLimit);
 297     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.top, strTemp, _tcslen(strTemp));
 298
 299     /*  y min */
 300     SetTextAlign(m_dcGrid, TA_RIGHT|TA_BASELINE);
 301     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dLowerLimit);
 302     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.bottom, strTemp, _tcslen(strTemp));
 303
 304     /*  x min */
 305     SetTextAlign(m_dcGrid, TA_LEFT|TA_TOP);
 306     TextOut(m_dcGrid, m_rectPlot.left, m_rectPlot.bottom+4, "0", 1);
 307
 308     /*  x max */
 309     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 310     sprintf(strTemp, "%d", m_nPlotWidth/m_nShiftPixels);
 311     TextOut(m_dcGrid, m_rectPlot.right, m_rectPlot.bottom+4, strTemp, _tcslen(strTemp));
 312
 313     /*  x units */
 314     SetTextAlign(m_dcGrid, TA_CENTER|TA_TOP);
 315     TextOut(m_dcGrid, (m_rectPlot.left+m_rectPlot.right)/2,
 316             m_rectPlot.bottom+4, m_strXUnitsString, _tcslen(m_strXUnitsString));
 317
 318     /*  restore the font */
 319     SelectObject(m_dcGrid, oldFont);
 320
 321     /*  y units */
 322     oldFont = (HFONT)SelectObject(m_dcGrid, yUnitFont);
 323     SetTextAlign(m_dcGrid, TA_CENTER|TA_BASELINE);
 324     TextOut(m_dcGrid, (m_rectClient.left+m_rectPlot.left)/2,
 325             (m_rectPlot.bottom+m_rectPlot.top)/2, m_strYUnitsString, _tcslen(m_strYUnitsString));
 326     SelectObject(m_dcGrid, oldFont);
 327 #endif
 328     /*  at this point we are done filling the the grid bitmap,  */
 329     /*  no more drawing to this bitmap is needed until the setting are changed */
 330
 331     /*  if we don't have one yet, set up a memory dc for the plot */
 332     if (this->m_dcPlot == NULL)
 333     {
 334         this->m_dcPlot = CreateCompatibleDC(dc);
 335         this->m_bitmapPlot = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 336         this->m_bitmapOldPlot = (HBITMAP)SelectObject(this->m_dcPlot, this->m_bitmapPlot);
 337     }
 338
 339     /*  make sure the plot bitmap is cleared */
 340     SetBkColor(this->m_dcPlot, this->m_crBackColor);
 341     FillRect(this->m_dcPlot, &this->m_rectClient, this->m_brushBack);
 342
 343     /*  finally, force the plot area to redraw */
 344     InvalidateRect(this->m_hParentWnd, &this->m_rectClient, TRUE);
 345     ReleaseDC(this->m_hParentWnd, dc);
 346 }
 347
 348 double GraphCtrl_AppendPoint(TGraphCtrl* this,
 349                              double dNewPoint0, double dNewPoint1,
 350                              double dNewPoint2, double dNewPoint3)
 351 {
 352     /*  append a data point to the plot & return the previous point */
 353     double dPrevious;
 354
 355     dPrevious = this->m_dCurrentPosition[0];
 356     this->m_dCurrentPosition[0] = dNewPoint0;
 357     this->m_dCurrentPosition[1] = dNewPoint1;
 358     this->m_dCurrentPosition[2] = dNewPoint2;
 359     this->m_dCurrentPosition[3] = dNewPoint3;
 360     GraphCtrl_DrawPoint(this);
 361     /* Invalidate(); */
 362     return dPrevious;
 363 }
 364
 365 void GraphCtrl_Paint(TGraphCtrl* this, HWND hWnd, HDC dc)
 366 {
 367     HDC memDC;
 368     HBITMAP memBitmap;
 369     HBITMAP oldBitmap; /*  bitmap originally found in CMemDC */
 370
 371 /*   RECT rcClient; */
 372 /*   GetClientRect(hWnd, &rcClient); */
 373 /*   FillSolidRect(dc, &rcClient, RGB(255, 0, 255)); */
 374 /*   m_nClientWidth = rcClient.right - rcClient.left; */
 375 /*   m_nClientHeight = rcClient.bottom - rcClient.top; */
 376
 377     /*  no real plotting work is performed here,  */
 378     /*  just putting the existing bitmaps on the client */
 379
 380     /*  to avoid flicker, establish a memory dc, draw to it */
 381     /*  and then BitBlt it to the client */
 382     memDC = CreateCompatibleDC(dc);
 383     memBitmap = (HBITMAP)CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 384     oldBitmap = (HBITMAP)SelectObject(memDC, memBitmap);
 385
 386     if (memDC != NULL)
 387     {
 388         /*  first drop the grid on the memory dc */
 389         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcGrid, 0, 0, SRCCOPY);
 390         /*  now add the plot on top as a "pattern" via SRCPAINT. */
 391         /*  works well with dark background and a light plot */
 392         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcPlot, 0, 0, SRCPAINT);  /* SRCPAINT */
 393         /*  finally send the result to the display */
 394         BitBlt(dc, 0, 0, this->m_nClientWidth, this->m_nClientHeight, memDC, 0, 0, SRCCOPY);
 395     }
 396     SelectObject(memDC, oldBitmap);
 397     DeleteObject(memBitmap);
 398     DeleteDC(memDC);
 399 }
 400
 401 void GraphCtrl_DrawPoint(TGraphCtrl* this)
 402 {
 403     /*  this does the work of "scrolling" the plot to the left
 404      *  and appending a new data point all of the plotting is
 405      *  directed to the memory based bitmap associated with m_dcPlot
 406      *  the will subsequently be BitBlt'd to the client in Paint
 407      */
 408     int currX, prevX, currY, prevY;
 409     HPEN oldPen;
 410     RECT rectCleanUp;
 411     int i;
 412
 413     if (this->m_dcPlot != NULL)
 414     {
 415         /*  shift the plot by BitBlt'ing it to itself
 416          *  note: the m_dcPlot covers the entire client
 417          *        but we only shift bitmap that is the size
 418          *        of the plot rectangle
 419          *  grab the right side of the plot (exluding m_nShiftPixels on the left)
 420          *  move this grabbed bitmap to the left by m_nShiftPixels
 421          */
 422         BitBlt(this->m_dcPlot, this->m_rectPlot.left, this->m_rectPlot.top+1,
 423                this->m_nPlotWidth, this->m_nPlotHeight, this->m_dcPlot,
 424                this->m_rectPlot.left+this->m_nShiftPixels, this->m_rectPlot.top+1,
 425                SRCCOPY);
 426
 427         /*  establish a rectangle over the right side of plot */
 428         /*  which now needs to be cleaned up proir to adding the new point */
 429         rectCleanUp = this->m_rectPlot;
 430         rectCleanUp.left  = rectCleanUp.right - this->m_nShiftPixels;
 431
 432         /*  fill the cleanup area with the background */
 433         FillRect(this->m_dcPlot, &rectCleanUp, this->m_brushBack);
 434
 435         /*  draw the next line segement */
 436         for (i = 0; i < MAX_PLOTS; i++)
 437         {
 438             /*  grab the plotting pen */
 439             oldPen = (HPEN)SelectObject(this->m_dcPlot, this->m_penPlot[i]);
 440
 441             /*  move to the previous point */
 442             prevX = this->m_rectPlot.right-this->m_nPlotShiftPixels;
 443             prevY = this->m_rectPlot.bottom -
 444                 (long)((this->m_dPreviousPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 445             MoveToEx(this->m_dcPlot, prevX, prevY, NULL);
 446
 447             /*  draw to the current point */
 448             currX = this->m_rectPlot.right-this->m_nHalfShiftPixels;
 449             currY = this->m_rectPlot.bottom -
 450                 (long)((this->m_dCurrentPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 451             LineTo(this->m_dcPlot, currX, currY);
 452
 453             /*  Restore the pen  */
 454             SelectObject(this->m_dcPlot, oldPen);
 455
 456             /*  if the data leaks over the upper or lower plot boundaries
 457              *  fill the upper and lower leakage with the background
 458              *  this will facilitate clipping on an as needed basis
 459              *  as opposed to always calling IntersectClipRect
 460              */
 461             if ((prevY <= this->m_rectPlot.top) || (currY <= this->m_rectPlot.top))
 462             {
 463                 RECT rc;
 464                 rc.bottom = this->m_rectPlot.top+1;
 465                 rc.left = prevX;
 466                 rc.right = currX+1;
 467                 rc.top = this->m_rectClient.top;
 468                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 469             }
 470             if ((prevY >= this->m_rectPlot.bottom) || (currY >= this->m_rectPlot.bottom))
 471             {
 472                 RECT rc;
 473                 rc.bottom = this->m_rectClient.bottom+1;
 474                 rc.left = prevX;
 475                 rc.right = currX+1;
 476                 rc.top = this->m_rectPlot.bottom+1;
 477                 /* RECT rc(prevX, m_rectPlot.bottom+1, currX+1, m_rectClient.bottom+1); */
 478                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 479             }
 480
 481             /*  store the current point for connection to the next point */
 482             this->m_dPreviousPosition[i] = this->m_dCurrentPosition[i];
 483         }
 484     }
 485 }
 486
 487 void GraphCtrl_Resize(TGraphCtrl* this)
 488 {
 489     /*  NOTE: Resize automatically gets called during the setup of the control */
 490     GetClientRect(this->m_hWnd, &this->m_rectClient);
 491
 492     /*  set some member variables to avoid multiple function calls */
 493     this->m_nClientHeight = this->m_rectClient.bottom - this->m_rectClient.top;/* m_rectClient.Height(); */
 494     this->m_nClientWidth  = this->m_rectClient.right - this->m_rectClient.left;/* m_rectClient.Width(); */
 495
 496     /*  the "left" coordinate and "width" will be modified in  */
 497     /*  InvalidateCtrl to be based on the width of the y axis scaling */
 498 #if 0
 499     this->m_rectPlot.left   = 20;
 500     this->m_rectPlot.top    = 10;
 501     this->m_rectPlot.right  = this->m_rectClient.right-10;
 502     this->m_rectPlot.bottom = this->m_rectClient.bottom-25;
 503 #else
 504     this->m_rectPlot.left   = 0;
 505     this->m_rectPlot.top    = -1;
 506     this->m_rectPlot.right  = this->m_rectClient.right-0;
 507     this->m_rectPlot.bottom = this->m_rectClient.bottom-0;
 508 #endif
 509
 510     /*  set some member variables to avoid multiple function calls */
 511     this->m_nPlotHeight = this->m_rectPlot.bottom - this->m_rectPlot.top;/* m_rectPlot.Height(); */
 512     this->m_nPlotWidth  = this->m_rectPlot.right - this->m_rectPlot.left;/* m_rectPlot.Width(); */
 513
 514     /*  set the scaling factor for now, this can be adjusted  */
 515     /*  in the SetRange functions */
 516     this->m_dVerticalFactor = (double)this->m_nPlotHeight / this->m_dRange;
 517 }
 518
 519 #if 0
 520 void TGraphCtrl::Reset()
 521 {
 522     /*  to clear the existing data (in the form of a bitmap) */
 523     /*  simply invalidate the entire control */
 524     InvalidateCtrl();
 525 }
 526 #endif
 527
 528 extern TGraphCtrl PerformancePageCpuUsageHistoryGraph;
 529 extern TGraphCtrl PerformancePageMemUsageHistoryGraph;
 530 extern HWND hPerformancePageCpuUsageHistoryGraph;
 531 extern HWND hPerformancePageMemUsageHistoryGraph;
 532
 533 INT_PTR CALLBACK
 534 GraphCtrl_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 535 {
 536     RECT        rcClient;
 537     HDC            hdc;
 538     PAINTSTRUCT     ps;
 539
 540     switch (message)
 541     {
 542     case WM_ERASEBKGND:
 543         return TRUE;
 544     /*
 545      *  Filter out mouse  & keyboard messages
 546      */
 547     /* case WM_APPCOMMAND: */
 548     case WM_CAPTURECHANGED:
 549     case WM_LBUTTONDBLCLK:
 550     case WM_LBUTTONDOWN:
 551     case WM_LBUTTONUP:
 552     case WM_MBUTTONDBLCLK:
 553     case WM_MBUTTONDOWN:
 554     case WM_MBUTTONUP:
 555     case WM_MOUSEACTIVATE:
 556     case WM_MOUSEHOVER:
 557     case WM_MOUSELEAVE:
 558     case WM_MOUSEMOVE:
 559     /* case WM_MOUSEWHEEL: */
 560     case WM_NCHITTEST:
 561     case WM_NCLBUTTONDBLCLK:
 562     case WM_NCLBUTTONDOWN:
 563     case WM_NCLBUTTONUP:
 564     case WM_NCMBUTTONDBLCLK:
 565     case WM_NCMBUTTONDOWN:
 566     case WM_NCMBUTTONUP:
 567     /* case WM_NCMOUSEHOVER: */
 568     /* case WM_NCMOUSELEAVE: */
 569     case WM_NCMOUSEMOVE:
 570     case WM_NCRBUTTONDBLCLK:
 571     case WM_NCRBUTTONDOWN:
 572     case WM_NCRBUTTONUP:
 573     /* case WM_NCXBUTTONDBLCLK: */
 574     /* case WM_NCXBUTTONDOWN: */
 575     /* case WM_NCXBUTTONUP: */
 576     case WM_RBUTTONDBLCLK:
 577     case WM_RBUTTONDOWN:
 578     case WM_RBUTTONUP:
 579     /* case WM_XBUTTONDBLCLK: */
 580     /* case WM_XBUTTONDOWN: */
 581     /* case WM_XBUTTONUP: */
 582     case WM_ACTIVATE:
 583     case WM_CHAR:
 584     case WM_DEADCHAR:
 585     case WM_GETHOTKEY:
 586     case WM_HOTKEY:
 587     case WM_KEYDOWN:
 588     case WM_KEYUP:
 589     case WM_KILLFOCUS:
 590     case WM_SETFOCUS:
 591     case WM_SETHOTKEY:
 592     case WM_SYSCHAR:
 593     case WM_SYSDEADCHAR:
 594     case WM_SYSKEYDOWN:
 595     case WM_SYSKEYUP:
 596         return 0;
 597
 598     case WM_NCCALCSIZE:
 599         return 0;
 600
 601     case WM_SIZE:
 602         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 603         {
 604             GraphCtrl_Resize(&PerformancePageMemUsageHistoryGraph);
 605             GraphCtrl_InvalidateCtrl(&PerformancePageMemUsageHistoryGraph);
 606         }
 607         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 608         {
 609             GraphCtrl_Resize(&PerformancePageCpuUsageHistoryGraph);
 610             GraphCtrl_InvalidateCtrl(&PerformancePageCpuUsageHistoryGraph);
 611         }
 612         return 0;
 613
 614     case WM_PAINT:
 615         hdc = BeginPaint(hWnd, &ps);
 616         GetClientRect(hWnd, &rcClient);
 617         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 618             GraphCtrl_Paint(&PerformancePageMemUsageHistoryGraph, hWnd, hdc);
 619         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 620             GraphCtrl_Paint(&PerformancePageCpuUsageHistoryGraph, hWnd, hdc);
 621         EndPaint(hWnd, &ps);
 622         return 0;
 623     }
 624
 625     /*
 626      *  We pass on all non-handled messages
 627      */
 628     return CallWindowProc((WNDPROC)OldGraphCtrlWndProc, hWnd, message, wParam, lParam);
 629 }