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