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