programs/taskmgr/graphctl.c

   1 /*
   2  *  ReactOS Task Manager
   3  *
   4  *  graphctl.c
   5  *
   6  *  Copyright (C) 2002  Robert Dickenson <robd@reactos.org>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library 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 GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #define WIN32_LEAN_AND_MEAN        /* Exclude rarely-used stuff from Windows headers */
  24 #include <windows.h>
  25 #include <commctrl.h>
  26 #include <stdlib.h>
  27 #include <memory.h>
  28 #include <tchar.h>
  29 #include <stdio.h>
  30
  31 #include <math.h>
  32 #include "graphctl.h"
  33 #include "taskmgr.h"
  34
  35 WNDPROC OldGraphCtrlWndProc;
  36
  37 static void GraphCtrl_Init(TGraphCtrl* this)
  38 {
  39     int i;
  40
  41     this->m_hWnd = 0;
  42     this->m_hParentWnd = 0;
  43     this->m_dcGrid = 0;
  44     this->m_dcPlot = 0;
  45     this->m_bitmapOldGrid = 0;
  46     this->m_bitmapOldPlot = 0;
  47     this->m_bitmapGrid = 0;
  48     this->m_bitmapPlot = 0;
  49     this->m_brushBack = 0;
  50
  51     this->m_penPlot[0] = 0;
  52     this->m_penPlot[1] = 0;
  53     this->m_penPlot[2] = 0;
  54     this->m_penPlot[3] = 0;
  55
  56     /* since plotting is based on a LineTo for each new point
  57      * we need a starting point (i.e. a "previous" point)
  58      * use 0.0 as the default first point.
  59      * these are public member variables, and can be changed outside
  60      * (after construction).  Therefore m_perviousPosition could be set to
  61      * a more appropriate value prior to the first call to SetPosition.
  62      */
  63     this->m_dPreviousPosition[0] = 0.0;
  64     this->m_dPreviousPosition[1] = 0.0;
  65     this->m_dPreviousPosition[2] = 0.0;
  66     this->m_dPreviousPosition[3] = 0.0;
  67
  68     /*  public variable for the number of decimal places on the y axis */
  69     this->m_nYDecimals = 3;
  70
  71     /*  set some initial values for the scaling until "SetRange" is called.
  72      *  these are protected varaibles and must be set with SetRange
  73      *  in order to ensure that m_dRange is updated accordingly
  74      */
  75     /*   m_dLowerLimit = -10.0; */
  76     /*   m_dUpperLimit =  10.0; */
  77     this->m_dLowerLimit = 0.0;
  78     this->m_dUpperLimit = 100.0;
  79     this->m_dRange      =  this->m_dUpperLimit - this->m_dLowerLimit;   /*  protected member variable */
  80
  81     /*  m_nShiftPixels determines how much the plot shifts (in terms of pixels)  */
  82     /*  with the addition of a new data point */
  83     this->m_nShiftPixels     = 4;
  84     this->m_nHalfShiftPixels = this->m_nShiftPixels/2;                     /*  protected */
  85     this->m_nPlotShiftPixels = this->m_nShiftPixels + this->m_nHalfShiftPixels;  /*  protected */
  86
  87     /*  background, grid and data colors */
  88     /*  these are public variables and can be set directly */
  89     this->m_crBackColor = RGB(  0,   0,   0);  /*  see also SetBackgroundColor */
  90     this->m_crGridColor = RGB(  0, 255, 255);  /*  see also SetGridColor */
  91     this->m_crPlotColor[0] = RGB(255, 255, 255);  /*  see also SetPlotColor */
  92     this->m_crPlotColor[1] = RGB(100, 255, 255);  /*  see also SetPlotColor */
  93     this->m_crPlotColor[2] = RGB(255, 100, 255);  /*  see also SetPlotColor */
  94     this->m_crPlotColor[3] = RGB(255, 255, 100);  /*  see also SetPlotColor */
  95
  96     /*  protected variables */
  97     for (i = 0; i < MAX_PLOTS; i++)
  98     {
  99         this->m_penPlot[i] = CreatePen(PS_SOLID, 0, this->m_crPlotColor[i]);
 100     }
 101     this->m_brushBack = CreateSolidBrush(this->m_crBackColor);
 102
 103     /*  public member variables, can be set directly  */
 104     strcpy(this->m_strXUnitsString, "Samples");  /*  can also be set with SetXUnits */
 105     strcpy(this->m_strYUnitsString, "Y units");  /*  can also be set with SetYUnits */
 106
 107     /*  protected bitmaps to restore the memory DC's */
 108     this->m_bitmapOldGrid = NULL;
 109     this->m_bitmapOldPlot = NULL;
 110 }
 111
 112 #if 0
 113 TGraphCtrl::~TGraphCtrl(void)
 114 {
 115     /*  just to be picky restore the bitmaps for the two memory dc's */
 116     /*  (these dc's are being destroyed so there shouldn't be any leaks) */
 117     if (m_bitmapOldGrid != NULL) SelectObject(m_dcGrid, m_bitmapOldGrid);
 118     if (m_bitmapOldPlot != NULL) SelectObject(m_dcPlot, m_bitmapOldPlot);
 119     if (m_bitmapGrid    != NULL) DeleteObject(m_bitmapGrid);
 120     if (m_bitmapPlot    != NULL) DeleteObject(m_bitmapPlot);
 121     if (m_dcGrid        != NULL) DeleteDC(m_dcGrid);
 122     if (m_dcPlot        != NULL) DeleteDC(m_dcPlot);
 123     if (m_brushBack     != NULL) DeleteObject(m_brushBack);
 124 }
 125 #endif
 126
 127 BOOL GraphCtrl_Create(TGraphCtrl* this, HWND hWnd, HWND hParentWnd, UINT nID)
 128 {
 129     GraphCtrl_Init(this);
 130     this->m_hParentWnd = hParentWnd;
 131     this->m_hWnd = hWnd;
 132     GraphCtrl_Resize(this);
 133     return 0;
 134 }
 135
 136 void GraphCtrl_SetRange(TGraphCtrl* this, double dLower, double dUpper, int nDecimalPlaces)
 137 {
 138     /* ASSERT(dUpper > dLower); */
 139     this->m_dLowerLimit     = dLower;
 140     this->m_dUpperLimit     = dUpper;
 141     this->m_nYDecimals      = nDecimalPlaces;
 142     this->m_dRange          = this->m_dUpperLimit - this->m_dLowerLimit;
 143     this->m_dVerticalFactor = (double)this->m_nPlotHeight / this->m_dRange;
 144     /*  clear out the existing garbage, re-start with a clean plot */
 145     GraphCtrl_InvalidateCtrl(this);
 146 }
 147
 148 #if 0
 149 void TGraphCtrl::SetXUnits(const char* string)
 150 {
 151     lstrcpynA(m_strXUnitsString, string, sizeof(m_strXUnitsString));
 152     /*  clear out the existing garbage, re-start with a clean plot */
 153     InvalidateCtrl();
 154 }
 155
 156 void TGraphCtrl::SetYUnits(const char* string)
 157 {
 158     lstrcpynA(m_strYUnitsString, string, sizeof(m_strYUnitsString));
 159     /*  clear out the existing garbage, re-start with a clean plot */
 160     InvalidateCtrl();
 161 }
 162 #endif
 163
 164 void GraphCtrl_SetGridColor(TGraphCtrl* this, COLORREF color)
 165 {
 166     this->m_crGridColor = color;
 167     /*  clear out the existing garbage, re-start with a clean plot */
 168     GraphCtrl_InvalidateCtrl(this);
 169 }
 170
 171 void GraphCtrl_SetPlotColor(TGraphCtrl* this, int plot, COLORREF color)
 172 {
 173     this->m_crPlotColor[plot] = color;
 174     DeleteObject(this->m_penPlot[plot]);
 175     this->m_penPlot[plot] = CreatePen(PS_SOLID, 0, this->m_crPlotColor[plot]);
 176     /*  clear out the existing garbage, re-start with a clean plot */
 177     GraphCtrl_InvalidateCtrl(this);
 178 }
 179
 180 void GraphCtrl_SetBackgroundColor(TGraphCtrl* this, COLORREF color)
 181 {
 182     this->m_crBackColor = color;
 183     DeleteObject(this->m_brushBack);
 184     this->m_brushBack = CreateSolidBrush(this->m_crBackColor);
 185     /*  clear out the existing garbage, re-start with a clean plot */
 186     GraphCtrl_InvalidateCtrl(this);
 187 }
 188
 189 void GraphCtrl_InvalidateCtrl(TGraphCtrl* this)
 190 {
 191     /*  There is a lot of drawing going on here - particularly in terms of  */
 192     /*  drawing the grid.  Don't panic, this is all being drawn (only once) */
 193     /*  to a bitmap.  The result is then BitBlt'd to the control whenever needed. */
 194     int i, j;
 195     int nCharacters;
 196     int nTopGridPix, nMidGridPix, nBottomGridPix;
 197
 198     HPEN oldPen;
 199     HPEN solidPen = CreatePen(PS_SOLID, 0, this->m_crGridColor);
 200     /* HFONT axisFont, yUnitFont, oldFont; */
 201     /* char strTemp[50]; */
 202
 203     /*  in case we haven't established the memory dc's */
 204     /* CClientDC dc(this); */
 205     HDC dc = GetDC(this->m_hParentWnd);
 206
 207     /*  if we don't have one yet, set up a memory dc for the grid */
 208     if (this->m_dcGrid == NULL)
 209     {
 210         this->m_dcGrid = CreateCompatibleDC(dc);
 211         this->m_bitmapGrid = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 212         this->m_bitmapOldGrid = SelectObject(this->m_dcGrid, this->m_bitmapGrid);
 213     }
 214
 215     SetBkColor(this->m_dcGrid, this->m_crBackColor);
 216
 217     /*  fill the grid background */
 218     FillRect(this->m_dcGrid, &this->m_rectClient, this->m_brushBack);
 219
 220     /*  draw the plot rectangle: */
 221     /*  determine how wide the y axis scaling values are */
 222     nCharacters = abs((int)log10(fabs(this->m_dUpperLimit)));
 223     nCharacters = max(nCharacters, abs((int)log10(fabs(this->m_dLowerLimit))));
 224
 225     /*  add the units digit, decimal point and a minus sign, and an extra space */
 226     /*  as well as the number of decimal places to display */
 227     nCharacters = nCharacters + 4 + this->m_nYDecimals;
 228
 229     /*  adjust the plot rectangle dimensions */
 230     /*  assume 6 pixels per character (this may need to be adjusted) */
 231     /*   m_rectPlot.left = m_rectClient.left + 6*(nCharacters); */
 232     this->m_rectPlot.left = this->m_rectClient.left;
 233     this->m_nPlotWidth    = this->m_rectPlot.right - this->m_rectPlot.left;/* m_rectPlot.Width(); */
 234
 235     /*  draw the plot rectangle */
 236     oldPen = SelectObject(this->m_dcGrid, solidPen);
 237     MoveToEx(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.top, NULL);
 238     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.top);
 239     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.bottom+1);
 240     LineTo(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.bottom+1);
 241     /*   LineTo(m_dcGrid, m_rectPlot.left, m_rectPlot.top); */
 242     SelectObject(this->m_dcGrid, oldPen);
 243     DeleteObject(solidPen);
 244
 245     /*  draw the dotted lines,
 246      *  use SetPixel instead of a dotted pen - this allows for a
 247      *  finer dotted line and a more "technical" look
 248      */
 249     nMidGridPix    = (this->m_rectPlot.top + this->m_rectPlot.bottom)/2;
 250     nTopGridPix    = nMidGridPix - this->m_nPlotHeight/4;
 251     nBottomGridPix = nMidGridPix + this->m_nPlotHeight/4;
 252
 253     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=2)
 254     {
 255         SetPixel(this->m_dcGrid, i, nTopGridPix,    this->m_crGridColor);
 256         SetPixel(this->m_dcGrid, i, nMidGridPix,    this->m_crGridColor);
 257         SetPixel(this->m_dcGrid, i, nBottomGridPix, this->m_crGridColor);
 258     }
 259
 260     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=10)
 261     {
 262         for (j=this->m_rectPlot.top; j<this->m_rectPlot.bottom; j+=2)
 263         {
 264             SetPixel(this->m_dcGrid, i, j, this->m_crGridColor);
 265             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 266             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 267         }
 268     }
 269
 270 #if 0
 271     /*  create some fonts (horizontal and vertical) */
 272     /*  use a height of 14 pixels and 300 weight  */
 273     /*  (these may need to be adjusted depending on the display) */
 274     axisFont = CreateFont (14, 0, 0, 0, 300,
 275                            FALSE, FALSE, 0, ANSI_CHARSET,
 276                            OUT_DEFAULT_PRECIS,
 277                            CLIP_DEFAULT_PRECIS,
 278                            DEFAULT_QUALITY,
 279                            DEFAULT_PITCH|FF_SWISS, "Arial");
 280     yUnitFont = CreateFont (14, 0, 900, 0, 300,
 281                             FALSE, FALSE, 0, ANSI_CHARSET,
 282                             OUT_DEFAULT_PRECIS,
 283                             CLIP_DEFAULT_PRECIS,
 284                             DEFAULT_QUALITY,
 285                             DEFAULT_PITCH|FF_SWISS, "Arial");
 286
 287     /*  grab the horizontal font */
 288     oldFont = SelectObject(m_dcGrid, axisFont);
 289
 290     /*  y max */
 291     SetTextColor(m_dcGrid, m_crGridColor);
 292     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 293     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dUpperLimit);
 294     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.top, strTemp, _tcslen(strTemp));
 295
 296     /*  y min */
 297     SetTextAlign(m_dcGrid, TA_RIGHT|TA_BASELINE);
 298     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dLowerLimit);
 299     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.bottom, strTemp, _tcslen(strTemp));
 300
 301     /*  x min */
 302     SetTextAlign(m_dcGrid, TA_LEFT|TA_TOP);
 303     TextOut(m_dcGrid, m_rectPlot.left, m_rectPlot.bottom+4, "0", 1);
 304
 305     /*  x max */
 306     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 307     sprintf(strTemp, "%d", m_nPlotWidth/m_nShiftPixels);
 308     TextOut(m_dcGrid, m_rectPlot.right, m_rectPlot.bottom+4, strTemp, _tcslen(strTemp));
 309
 310     /*  x units */
 311     SetTextAlign(m_dcGrid, TA_CENTER|TA_TOP);
 312     TextOut(m_dcGrid, (m_rectPlot.left+m_rectPlot.right)/2,
 313             m_rectPlot.bottom+4, m_strXUnitsString, _tcslen(m_strXUnitsString));
 314
 315     /*  restore the font */
 316     SelectObject(m_dcGrid, oldFont);
 317
 318     /*  y units */
 319     oldFont = SelectObject(m_dcGrid, yUnitFont);
 320     SetTextAlign(m_dcGrid, TA_CENTER|TA_BASELINE);
 321     TextOut(m_dcGrid, (m_rectClient.left+m_rectPlot.left)/2,
 322             (m_rectPlot.bottom+m_rectPlot.top)/2, m_strYUnitsString, _tcslen(m_strYUnitsString));
 323     SelectObject(m_dcGrid, oldFont);
 324 #endif
 325     /*  at this point we are done filling the grid bitmap,  */
 326     /*  no more drawing to this bitmap is needed until the settings are changed */
 327
 328     /*  if we don't have one yet, set up a memory dc for the plot */
 329     if (this->m_dcPlot == NULL)
 330     {
 331         this->m_dcPlot = CreateCompatibleDC(dc);
 332         this->m_bitmapPlot = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 333         this->m_bitmapOldPlot = SelectObject(this->m_dcPlot, this->m_bitmapPlot);
 334     }
 335
 336     /*  make sure the plot bitmap is cleared */
 337     SetBkColor(this->m_dcPlot, this->m_crBackColor);
 338     FillRect(this->m_dcPlot, &this->m_rectClient, this->m_brushBack);
 339
 340     /*  finally, force the plot area to redraw */
 341     InvalidateRect(this->m_hParentWnd, &this->m_rectClient, TRUE);
 342     ReleaseDC(this->m_hParentWnd, dc);
 343 }
 344
 345 double GraphCtrl_AppendPoint(TGraphCtrl* this,
 346                              double dNewPoint0, double dNewPoint1,
 347                              double dNewPoint2, double dNewPoint3)
 348 {
 349     /*  append a data point to the plot & return the previous point */
 350     double dPrevious;
 351
 352     dPrevious = this->m_dCurrentPosition[0];
 353     this->m_dCurrentPosition[0] = dNewPoint0;
 354     this->m_dCurrentPosition[1] = dNewPoint1;
 355     this->m_dCurrentPosition[2] = dNewPoint2;
 356     this->m_dCurrentPosition[3] = dNewPoint3;
 357     GraphCtrl_DrawPoint(this);
 358     /* Invalidate(); */
 359     return dPrevious;
 360 }
 361
 362 void GraphCtrl_Paint(TGraphCtrl* this, HWND hWnd, HDC dc)
 363 {
 364     HDC memDC;
 365     HBITMAP memBitmap;
 366     HBITMAP oldBitmap; /*  bitmap originally found in CMemDC */
 367
 368 /*   RECT rcClient; */
 369 /*   GetClientRect(hWnd, &rcClient); */
 370 /*   FillSolidRect(dc, &rcClient, RGB(255, 0, 255)); */
 371 /*   m_nClientWidth = rcClient.right - rcClient.left; */
 372 /*   m_nClientHeight = rcClient.bottom - rcClient.top; */
 373
 374     /*  no real plotting work is performed here,  */
 375     /*  just putting the existing bitmaps on the client */
 376
 377     /*  to avoid flicker, establish a memory dc, draw to it */
 378     /*  and then BitBlt it to the client */
 379     memDC = CreateCompatibleDC(dc);
 380     memBitmap = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 381     oldBitmap = SelectObject(memDC, memBitmap);
 382
 383     if (memDC != NULL)
 384     {
 385         /*  first drop the grid on the memory dc */
 386         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcGrid, 0, 0, SRCCOPY);
 387         /*  now add the plot on top as a "pattern" via SRCPAINT. */
 388         /*  works well with dark background and a light plot */
 389         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcPlot, 0, 0, SRCPAINT);  /* SRCPAINT */
 390         /*  finally send the result to the display */
 391         BitBlt(dc, 0, 0, this->m_nClientWidth, this->m_nClientHeight, memDC, 0, 0, SRCCOPY);
 392     }
 393     SelectObject(memDC, oldBitmap);
 394     DeleteObject(memBitmap);
 395     DeleteDC(memDC);
 396 }
 397
 398 void GraphCtrl_DrawPoint(TGraphCtrl* this)
 399 {
 400     /*  this does the work of "scrolling" the plot to the left
 401      *  and appending a new data point all of the plotting is
 402      *  directed to the memory based bitmap associated with m_dcPlot
 403      *  the will subsequently be BitBlt'd to the client in Paint
 404      */
 405     int currX, prevX, currY, prevY;
 406     HPEN oldPen;
 407     RECT rectCleanUp;
 408     int i;
 409
 410     if (this->m_dcPlot != NULL)
 411     {
 412         /*  shift the plot by BitBlt'ing it to itself
 413          *  note: the m_dcPlot covers the entire client
 414          *        but we only shift bitmap that is the size
 415          *        of the plot rectangle
 416          *  grab the right side of the plot (excluding m_nShiftPixels on the left)
 417          *  move this grabbed bitmap to the left by m_nShiftPixels
 418          */
 419         BitBlt(this->m_dcPlot, this->m_rectPlot.left, this->m_rectPlot.top+1,
 420                this->m_nPlotWidth, this->m_nPlotHeight, this->m_dcPlot,
 421                this->m_rectPlot.left+this->m_nShiftPixels, this->m_rectPlot.top+1,
 422                SRCCOPY);
 423
 424         /*  establish a rectangle over the right side of plot */
 425         /*  which now needs to be cleaned up proir to adding the new point */
 426         rectCleanUp = this->m_rectPlot;
 427         rectCleanUp.left  = rectCleanUp.right - this->m_nShiftPixels;
 428
 429         /*  fill the cleanup area with the background */
 430         FillRect(this->m_dcPlot, &rectCleanUp, this->m_brushBack);
 431
 432         /*  draw the next line segment */
 433         for (i = 0; i < MAX_PLOTS; i++)
 434         {
 435             /*  grab the plotting pen */
 436             oldPen = SelectObject(this->m_dcPlot, this->m_penPlot[i]);
 437
 438             /*  move to the previous point */
 439             prevX = this->m_rectPlot.right-this->m_nPlotShiftPixels;
 440             prevY = this->m_rectPlot.bottom -
 441                 (long)((this->m_dPreviousPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 442             MoveToEx(this->m_dcPlot, prevX, prevY, NULL);
 443
 444             /*  draw to the current point */
 445             currX = this->m_rectPlot.right-this->m_nHalfShiftPixels;
 446             currY = this->m_rectPlot.bottom -
 447                 (long)((this->m_dCurrentPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 448             LineTo(this->m_dcPlot, currX, currY);
 449
 450             /*  Restore the pen  */
 451             SelectObject(this->m_dcPlot, oldPen);
 452
 453             /*  if the data leaks over the upper or lower plot boundaries
 454              *  fill the upper and lower leakage with the background
 455              *  this will facilitate clipping on an as needed basis
 456              *  as opposed to always calling IntersectClipRect
 457              */
 458             if ((prevY <= this->m_rectPlot.top) || (currY <= this->m_rectPlot.top))
 459             {
 460                 RECT rc;
 461                 rc.bottom = this->m_rectPlot.top+1;
 462                 rc.left = prevX;
 463                 rc.right = currX+1;
 464                 rc.top = this->m_rectClient.top;
 465                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 466             }
 467             if ((prevY >= this->m_rectPlot.bottom) || (currY >= this->m_rectPlot.bottom))
 468             {
 469                 RECT rc;
 470                 rc.bottom = this->m_rectClient.bottom+1;
 471                 rc.left = prevX;
 472                 rc.right = currX+1;
 473                 rc.top = this->m_rectPlot.bottom+1;
 474                 /* RECT rc(prevX, m_rectPlot.bottom+1, currX+1, m_rectClient.bottom+1); */
 475                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 476             }
 477
 478             /*  store the current point for connection to the next point */
 479             this->m_dPreviousPosition[i] = this->m_dCurrentPosition[i];
 480         }
 481     }
 482 }
 483
 484 void GraphCtrl_Resize(TGraphCtrl* this)
 485 {
 486     /*  NOTE: Resize automatically gets called during the setup of the control */
 487     GetClientRect(this->m_hWnd, &this->m_rectClient);
 488
 489     /*  set some member variables to avoid multiple function calls */
 490     this->m_nClientHeight = this->m_rectClient.bottom - this->m_rectClient.top;/* m_rectClient.Height(); */
 491     this->m_nClientWidth  = this->m_rectClient.right - this->m_rectClient.left;/* m_rectClient.Width(); */
 492
 493     /*  the "left" coordinate and "width" will be modified in  */
 494     /*  InvalidateCtrl to be based on the width of the y axis scaling */
 495 #if 0
 496     this->m_rectPlot.left   = 20;
 497     this->m_rectPlot.top    = 10;
 498     this->m_rectPlot.right  = this->m_rectClient.right-10;
 499     this->m_rectPlot.bottom = this->m_rectClient.bottom-25;
 500 #else
 501     this->m_rectPlot.left   = 0;
 502     this->m_rectPlot.top    = -1;
 503     this->m_rectPlot.right  = this->m_rectClient.right-0;
 504     this->m_rectPlot.bottom = this->m_rectClient.bottom-0;
 505 #endif
 506
 507     /*  set some member variables to avoid multiple function calls */
 508     this->m_nPlotHeight = this->m_rectPlot.bottom - this->m_rectPlot.top;/* m_rectPlot.Height(); */
 509     this->m_nPlotWidth  = this->m_rectPlot.right - this->m_rectPlot.left;/* m_rectPlot.Width(); */
 510
 511     /*  set the scaling factor for now, this can be adjusted  */
 512     /*  in the SetRange functions */
 513     this->m_dVerticalFactor = (double)this->m_nPlotHeight / this->m_dRange;
 514 }
 515
 516 #if 0
 517 void TGraphCtrl::Reset(void)
 518 {
 519     /*  to clear the existing data (in the form of a bitmap) */
 520     /*  simply invalidate the entire control */
 521     InvalidateCtrl();
 522 }
 523 #endif
 524
 525 extern TGraphCtrl PerformancePageCpuUsageHistoryGraph;
 526 extern TGraphCtrl PerformancePageMemUsageHistoryGraph;
 527 extern HWND hPerformancePageCpuUsageHistoryGraph;
 528 extern HWND hPerformancePageMemUsageHistoryGraph;
 529
 530 INT_PTR CALLBACK
 531 GraphCtrl_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 532 {
 533     RECT        rcClient;
 534     HDC            hdc;
 535     PAINTSTRUCT     ps;
 536
 537     switch (message)
 538     {
 539     case WM_ERASEBKGND:
 540         return TRUE;
 541     /*
 542      *  Filter out mouse  & keyboard messages
 543      */
 544     /* case WM_APPCOMMAND: */
 545     case WM_CAPTURECHANGED:
 546     case WM_LBUTTONDBLCLK:
 547     case WM_LBUTTONDOWN:
 548     case WM_LBUTTONUP:
 549     case WM_MBUTTONDBLCLK:
 550     case WM_MBUTTONDOWN:
 551     case WM_MBUTTONUP:
 552     case WM_MOUSEACTIVATE:
 553     case WM_MOUSEHOVER:
 554     case WM_MOUSELEAVE:
 555     case WM_MOUSEMOVE:
 556     /* case WM_MOUSEWHEEL: */
 557     case WM_NCHITTEST:
 558     case WM_NCLBUTTONDBLCLK:
 559     case WM_NCLBUTTONDOWN:
 560     case WM_NCLBUTTONUP:
 561     case WM_NCMBUTTONDBLCLK:
 562     case WM_NCMBUTTONDOWN:
 563     case WM_NCMBUTTONUP:
 564     /* case WM_NCMOUSEHOVER: */
 565     /* case WM_NCMOUSELEAVE: */
 566     case WM_NCMOUSEMOVE:
 567     case WM_NCRBUTTONDBLCLK:
 568     case WM_NCRBUTTONDOWN:
 569     case WM_NCRBUTTONUP:
 570     /* case WM_NCXBUTTONDBLCLK: */
 571     /* case WM_NCXBUTTONDOWN: */
 572     /* case WM_NCXBUTTONUP: */
 573     case WM_RBUTTONDBLCLK:
 574     case WM_RBUTTONDOWN:
 575     case WM_RBUTTONUP:
 576     /* case WM_XBUTTONDBLCLK: */
 577     /* case WM_XBUTTONDOWN: */
 578     /* case WM_XBUTTONUP: */
 579     case WM_ACTIVATE:
 580     case WM_CHAR:
 581     case WM_DEADCHAR:
 582     case WM_GETHOTKEY:
 583     case WM_HOTKEY:
 584     case WM_KEYDOWN:
 585     case WM_KEYUP:
 586     case WM_KILLFOCUS:
 587     case WM_SETFOCUS:
 588     case WM_SETHOTKEY:
 589     case WM_SYSCHAR:
 590     case WM_SYSDEADCHAR:
 591     case WM_SYSKEYDOWN:
 592     case WM_SYSKEYUP:
 593         return 0;
 594
 595     case WM_NCCALCSIZE:
 596         return 0;
 597
 598     case WM_SIZE:
 599         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 600         {
 601             GraphCtrl_Resize(&PerformancePageMemUsageHistoryGraph);
 602             GraphCtrl_InvalidateCtrl(&PerformancePageMemUsageHistoryGraph);
 603         }
 604         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 605         {
 606             GraphCtrl_Resize(&PerformancePageCpuUsageHistoryGraph);
 607             GraphCtrl_InvalidateCtrl(&PerformancePageCpuUsageHistoryGraph);
 608         }
 609         return 0;
 610
 611     case WM_PAINT:
 612         hdc = BeginPaint(hWnd, &ps);
 613         GetClientRect(hWnd, &rcClient);
 614         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 615             GraphCtrl_Paint(&PerformancePageMemUsageHistoryGraph, hWnd, hdc);
 616         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 617             GraphCtrl_Paint(&PerformancePageCpuUsageHistoryGraph, hWnd, hdc);
 618         EndPaint(hWnd, &ps);
 619         return 0;
 620     }
 621
 622     /*
 623      *  We pass on all non-handled messages
 624      */
 625     return CallWindowProc((WNDPROC)OldGraphCtrlWndProc, hWnd, message, wParam, lParam);
 626 }