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 BOOL 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     return 0;
 163 }
 164
 165 static void GraphCtrl_InvalidateCtrl(TGraphCtrl* this)
 166 {
 167     /*  There is a lot of drawing going on here - particularly in terms of  */
 168     /*  drawing the grid.  Don't panic, this is all being drawn (only once) */
 169     /*  to a bitmap.  The result is then BitBlt'd to the control whenever needed. */
 170     int i, j;
 171     int nCharacters;
 172     int nTopGridPix, nMidGridPix, nBottomGridPix;
 173
 174     HPEN oldPen;
 175     HPEN solidPen = CreatePen(PS_SOLID, 0, this->m_crGridColor);
 176     /* HFONT axisFont, yUnitFont, oldFont; */
 177     /* char strTemp[50]; */
 178
 179     /*  in case we haven't established the memory dc's */
 180     /* CClientDC dc(this); */
 181     HDC dc = GetDC(this->m_hParentWnd);
 182
 183     /*  if we don't have one yet, set up a memory dc for the grid */
 184     if (this->m_dcGrid == NULL)
 185     {
 186         this->m_dcGrid = CreateCompatibleDC(dc);
 187         this->m_bitmapGrid = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 188         this->m_bitmapOldGrid = SelectObject(this->m_dcGrid, this->m_bitmapGrid);
 189     }
 190
 191     SetBkColor(this->m_dcGrid, this->m_crBackColor);
 192
 193     /*  fill the grid background */
 194     FillRect(this->m_dcGrid, &this->m_rectClient, this->m_brushBack);
 195
 196     /*  draw the plot rectangle: */
 197     /*  determine how wide the y axis scaling values are */
 198     nCharacters = abs((int)log10(fabs(this->m_dUpperLimit)));
 199     nCharacters = max(nCharacters, abs((int)log10(fabs(this->m_dLowerLimit))));
 200
 201     /*  add the units digit, decimal point and a minus sign, and an extra space */
 202     /*  as well as the number of decimal places to display */
 203     nCharacters = nCharacters + 4 + this->m_nYDecimals;
 204
 205     /*  adjust the plot rectangle dimensions */
 206     /*  assume 6 pixels per character (this may need to be adjusted) */
 207     /*   m_rectPlot.left = m_rectClient.left + 6*(nCharacters); */
 208     this->m_rectPlot.left = this->m_rectClient.left;
 209     this->m_nPlotWidth    = this->m_rectPlot.right - this->m_rectPlot.left;/* m_rectPlot.Width(); */
 210
 211     /*  draw the plot rectangle */
 212     oldPen = SelectObject(this->m_dcGrid, solidPen);
 213     MoveToEx(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.top, NULL);
 214     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.top);
 215     LineTo(this->m_dcGrid, this->m_rectPlot.right+1, this->m_rectPlot.bottom+1);
 216     LineTo(this->m_dcGrid, this->m_rectPlot.left, this->m_rectPlot.bottom+1);
 217     /*   LineTo(m_dcGrid, m_rectPlot.left, m_rectPlot.top); */
 218     SelectObject(this->m_dcGrid, oldPen);
 219     DeleteObject(solidPen);
 220
 221     /*  draw the dotted lines,
 222      *  use SetPixel instead of a dotted pen - this allows for a
 223      *  finer dotted line and a more "technical" look
 224      */
 225     nMidGridPix    = (this->m_rectPlot.top + this->m_rectPlot.bottom)/2;
 226     nTopGridPix    = nMidGridPix - this->m_nPlotHeight/4;
 227     nBottomGridPix = nMidGridPix + this->m_nPlotHeight/4;
 228
 229     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=2)
 230     {
 231         SetPixel(this->m_dcGrid, i, nTopGridPix,    this->m_crGridColor);
 232         SetPixel(this->m_dcGrid, i, nMidGridPix,    this->m_crGridColor);
 233         SetPixel(this->m_dcGrid, i, nBottomGridPix, this->m_crGridColor);
 234     }
 235
 236     for (i=this->m_rectPlot.left; i<this->m_rectPlot.right; i+=10)
 237     {
 238         for (j=this->m_rectPlot.top; j<this->m_rectPlot.bottom; j+=2)
 239         {
 240             SetPixel(this->m_dcGrid, i, j, this->m_crGridColor);
 241             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 242             /*       SetPixel(m_dcGrid, i, j, m_crGridColor); */
 243         }
 244     }
 245
 246 #if 0
 247     /*  create some fonts (horizontal and vertical) */
 248     /*  use a height of 14 pixels and 300 weight  */
 249     /*  (these may need to be adjusted depending on the display) */
 250     axisFont = CreateFont (14, 0, 0, 0, 300,
 251                            FALSE, FALSE, 0, ANSI_CHARSET,
 252                            OUT_DEFAULT_PRECIS,
 253                            CLIP_DEFAULT_PRECIS,
 254                            DEFAULT_QUALITY,
 255                            DEFAULT_PITCH|FF_SWISS, "Arial");
 256     yUnitFont = CreateFont (14, 0, 900, 0, 300,
 257                             FALSE, FALSE, 0, ANSI_CHARSET,
 258                             OUT_DEFAULT_PRECIS,
 259                             CLIP_DEFAULT_PRECIS,
 260                             DEFAULT_QUALITY,
 261                             DEFAULT_PITCH|FF_SWISS, "Arial");
 262
 263     /*  grab the horizontal font */
 264     oldFont = SelectObject(m_dcGrid, axisFont);
 265
 266     /*  y max */
 267     SetTextColor(m_dcGrid, m_crGridColor);
 268     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 269     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dUpperLimit);
 270     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.top, strTemp, _tcslen(strTemp));
 271
 272     /*  y min */
 273     SetTextAlign(m_dcGrid, TA_RIGHT|TA_BASELINE);
 274     sprintf(strTemp, "%.*lf", m_nYDecimals, m_dLowerLimit);
 275     TextOut(m_dcGrid, m_rectPlot.left-4, m_rectPlot.bottom, strTemp, _tcslen(strTemp));
 276
 277     /*  x min */
 278     SetTextAlign(m_dcGrid, TA_LEFT|TA_TOP);
 279     TextOut(m_dcGrid, m_rectPlot.left, m_rectPlot.bottom+4, "0", 1);
 280
 281     /*  x max */
 282     SetTextAlign(m_dcGrid, TA_RIGHT|TA_TOP);
 283     sprintf(strTemp, "%d", m_nPlotWidth/m_nShiftPixels);
 284     TextOut(m_dcGrid, m_rectPlot.right, m_rectPlot.bottom+4, strTemp, _tcslen(strTemp));
 285
 286     /*  x units */
 287     SetTextAlign(m_dcGrid, TA_CENTER|TA_TOP);
 288     TextOut(m_dcGrid, (m_rectPlot.left+m_rectPlot.right)/2,
 289             m_rectPlot.bottom+4, m_strXUnitsString, _tcslen(m_strXUnitsString));
 290
 291     /*  restore the font */
 292     SelectObject(m_dcGrid, oldFont);
 293
 294     /*  y units */
 295     oldFont = SelectObject(m_dcGrid, yUnitFont);
 296     SetTextAlign(m_dcGrid, TA_CENTER|TA_BASELINE);
 297     TextOut(m_dcGrid, (m_rectClient.left+m_rectPlot.left)/2,
 298             (m_rectPlot.bottom+m_rectPlot.top)/2, m_strYUnitsString, _tcslen(m_strYUnitsString));
 299     SelectObject(m_dcGrid, oldFont);
 300 #endif
 301     /*  at this point we are done filling the grid bitmap,  */
 302     /*  no more drawing to this bitmap is needed until the settings are changed */
 303
 304     /*  if we don't have one yet, set up a memory dc for the plot */
 305     if (this->m_dcPlot == NULL)
 306     {
 307         this->m_dcPlot = CreateCompatibleDC(dc);
 308         this->m_bitmapPlot = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 309         this->m_bitmapOldPlot = SelectObject(this->m_dcPlot, this->m_bitmapPlot);
 310     }
 311
 312     /*  make sure the plot bitmap is cleared */
 313     SetBkColor(this->m_dcPlot, this->m_crBackColor);
 314     FillRect(this->m_dcPlot, &this->m_rectClient, this->m_brushBack);
 315
 316     /*  finally, force the plot area to redraw */
 317     InvalidateRect(this->m_hParentWnd, &this->m_rectClient, TRUE);
 318     ReleaseDC(this->m_hParentWnd, dc);
 319 }
 320
 321 void GraphCtrl_SetRange(TGraphCtrl* this, double dLower, double dUpper, int nDecimalPlaces)
 322 {
 323     /* ASSERT(dUpper > dLower); */
 324     this->m_dLowerLimit     = dLower;
 325     this->m_dUpperLimit     = dUpper;
 326     this->m_nYDecimals      = nDecimalPlaces;
 327     this->m_dRange          = this->m_dUpperLimit - this->m_dLowerLimit;
 328     this->m_dVerticalFactor = (double)this->m_nPlotHeight / this->m_dRange;
 329     /*  clear out the existing garbage, re-start with a clean plot */
 330     GraphCtrl_InvalidateCtrl(this);
 331 }
 332
 333 #if 0
 334 void TGraphCtrl::SetXUnits(const char* string)
 335 {
 336     lstrcpynA(m_strXUnitsString, string, sizeof(m_strXUnitsString));
 337     /*  clear out the existing garbage, re-start with a clean plot */
 338     InvalidateCtrl();
 339 }
 340
 341 void TGraphCtrl::SetYUnits(const char* string)
 342 {
 343     lstrcpynA(m_strYUnitsString, string, sizeof(m_strYUnitsString));
 344     /*  clear out the existing garbage, re-start with a clean plot */
 345     InvalidateCtrl();
 346 }
 347 #endif
 348
 349 void GraphCtrl_SetGridColor(TGraphCtrl* this, COLORREF color)
 350 {
 351     this->m_crGridColor = color;
 352     /*  clear out the existing garbage, re-start with a clean plot */
 353     GraphCtrl_InvalidateCtrl(this);
 354 }
 355
 356 void GraphCtrl_SetPlotColor(TGraphCtrl* this, int plot, COLORREF color)
 357 {
 358     this->m_crPlotColor[plot] = color;
 359     DeleteObject(this->m_penPlot[plot]);
 360     this->m_penPlot[plot] = CreatePen(PS_SOLID, 0, this->m_crPlotColor[plot]);
 361     /*  clear out the existing garbage, re-start with a clean plot */
 362     GraphCtrl_InvalidateCtrl(this);
 363 }
 364
 365 void GraphCtrl_SetBackgroundColor(TGraphCtrl* this, COLORREF color)
 366 {
 367     this->m_crBackColor = color;
 368     DeleteObject(this->m_brushBack);
 369     this->m_brushBack = CreateSolidBrush(this->m_crBackColor);
 370     /*  clear out the existing garbage, re-start with a clean plot */
 371     GraphCtrl_InvalidateCtrl(this);
 372 }
 373
 374 static void GraphCtrl_DrawPoint(TGraphCtrl* this)
 375 {
 376     /*  this does the work of "scrolling" the plot to the left
 377      *  and appending a new data point all of the plotting is
 378      *  directed to the memory based bitmap associated with m_dcPlot
 379      *  the will subsequently be BitBlt'd to the client in Paint
 380      */
 381     int currX, prevX, currY, prevY;
 382     HPEN oldPen;
 383     RECT rectCleanUp;
 384     int i;
 385
 386     if (this->m_dcPlot != NULL)
 387     {
 388         /*  shift the plot by BitBlt'ing it to itself
 389          *  note: the m_dcPlot covers the entire client
 390          *        but we only shift bitmap that is the size
 391          *        of the plot rectangle
 392          *  grab the right side of the plot (excluding m_nShiftPixels on the left)
 393          *  move this grabbed bitmap to the left by m_nShiftPixels
 394          */
 395         BitBlt(this->m_dcPlot, this->m_rectPlot.left, this->m_rectPlot.top+1,
 396                this->m_nPlotWidth, this->m_nPlotHeight, this->m_dcPlot,
 397                this->m_rectPlot.left+this->m_nShiftPixels, this->m_rectPlot.top+1,
 398                SRCCOPY);
 399
 400         /*  establish a rectangle over the right side of plot */
 401         /*  which now needs to be cleaned up prior to adding the new point */
 402         rectCleanUp = this->m_rectPlot;
 403         rectCleanUp.left  = rectCleanUp.right - this->m_nShiftPixels;
 404
 405         /*  fill the cleanup area with the background */
 406         FillRect(this->m_dcPlot, &rectCleanUp, this->m_brushBack);
 407
 408         /*  draw the next line segment */
 409         for (i = 0; i < MAX_PLOTS; i++)
 410         {
 411             /*  grab the plotting pen */
 412             oldPen = SelectObject(this->m_dcPlot, this->m_penPlot[i]);
 413
 414             /*  move to the previous point */
 415             prevX = this->m_rectPlot.right-this->m_nPlotShiftPixels;
 416             prevY = this->m_rectPlot.bottom -
 417                 (int)((this->m_dPreviousPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 418             MoveToEx(this->m_dcPlot, prevX, prevY, NULL);
 419
 420             /*  draw to the current point */
 421             currX = this->m_rectPlot.right-this->m_nHalfShiftPixels;
 422             currY = this->m_rectPlot.bottom -
 423                 (int)((this->m_dCurrentPosition[i] - this->m_dLowerLimit) * this->m_dVerticalFactor);
 424             LineTo(this->m_dcPlot, currX, currY);
 425
 426             /*  Restore the pen  */
 427             SelectObject(this->m_dcPlot, oldPen);
 428
 429             /*  if the data leaks over the upper or lower plot boundaries
 430              *  fill the upper and lower leakage with the background
 431              *  this will facilitate clipping on an as needed basis
 432              *  as opposed to always calling IntersectClipRect
 433              */
 434             if ((prevY <= this->m_rectPlot.top) || (currY <= this->m_rectPlot.top))
 435             {
 436                 RECT rc;
 437                 rc.bottom = this->m_rectPlot.top+1;
 438                 rc.left = prevX;
 439                 rc.right = currX+1;
 440                 rc.top = this->m_rectClient.top;
 441                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 442             }
 443             if ((prevY >= this->m_rectPlot.bottom) || (currY >= this->m_rectPlot.bottom))
 444             {
 445                 RECT rc;
 446                 rc.bottom = this->m_rectClient.bottom+1;
 447                 rc.left = prevX;
 448                 rc.right = currX+1;
 449                 rc.top = this->m_rectPlot.bottom+1;
 450                 /* RECT rc(prevX, m_rectPlot.bottom+1, currX+1, m_rectClient.bottom+1); */
 451                 FillRect(this->m_dcPlot, &rc, this->m_brushBack);
 452             }
 453
 454             /*  store the current point for connection to the next point */
 455             this->m_dPreviousPosition[i] = this->m_dCurrentPosition[i];
 456         }
 457     }
 458 }
 459
 460 double GraphCtrl_AppendPoint(TGraphCtrl* this,
 461                              double dNewPoint0, double dNewPoint1,
 462                              double dNewPoint2, double dNewPoint3)
 463 {
 464     /*  append a data point to the plot & return the previous point */
 465     double dPrevious;
 466
 467     dPrevious = this->m_dCurrentPosition[0];
 468     this->m_dCurrentPosition[0] = dNewPoint0;
 469     this->m_dCurrentPosition[1] = dNewPoint1;
 470     this->m_dCurrentPosition[2] = dNewPoint2;
 471     this->m_dCurrentPosition[3] = dNewPoint3;
 472     GraphCtrl_DrawPoint(this);
 473     /* Invalidate(); */
 474     return dPrevious;
 475 }
 476
 477 static void GraphCtrl_Paint(TGraphCtrl* this, HWND hWnd, HDC dc)
 478 {
 479     HDC memDC;
 480     HBITMAP memBitmap;
 481     HBITMAP oldBitmap; /*  bitmap originally found in CMemDC */
 482
 483 /*   RECT rcClient; */
 484 /*   GetClientRect(hWnd, &rcClient); */
 485 /*   FillSolidRect(dc, &rcClient, RGB(255, 0, 255)); */
 486 /*   m_nClientWidth = rcClient.right - rcClient.left; */
 487 /*   m_nClientHeight = rcClient.bottom - rcClient.top; */
 488
 489     /*  no real plotting work is performed here,  */
 490     /*  just putting the existing bitmaps on the client */
 491
 492     /*  to avoid flicker, establish a memory dc, draw to it */
 493     /*  and then BitBlt it to the client */
 494     memDC = CreateCompatibleDC(dc);
 495     memBitmap = CreateCompatibleBitmap(dc, this->m_nClientWidth, this->m_nClientHeight);
 496     oldBitmap = SelectObject(memDC, memBitmap);
 497
 498     if (memDC != NULL)
 499     {
 500         /*  first drop the grid on the memory dc */
 501         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcGrid, 0, 0, SRCCOPY);
 502         /*  now add the plot on top as a "pattern" via SRCPAINT. */
 503         /*  works well with dark background and a light plot */
 504         BitBlt(memDC, 0, 0, this->m_nClientWidth, this->m_nClientHeight, this->m_dcPlot, 0, 0, SRCPAINT);  /* SRCPAINT */
 505         /*  finally send the result to the display */
 506         BitBlt(dc, 0, 0, this->m_nClientWidth, this->m_nClientHeight, memDC, 0, 0, SRCCOPY);
 507     }
 508     SelectObject(memDC, oldBitmap);
 509     DeleteObject(memBitmap);
 510     DeleteDC(memDC);
 511 }
 512
 513 #if 0
 514 void TGraphCtrl::Reset(void)
 515 {
 516     /*  to clear the existing data (in the form of a bitmap) */
 517     /*  simply invalidate the entire control */
 518     InvalidateCtrl();
 519 }
 520 #endif
 521
 522 extern TGraphCtrl PerformancePageCpuUsageHistoryGraph;
 523 extern TGraphCtrl PerformancePageMemUsageHistoryGraph;
 524 extern HWND hPerformancePageCpuUsageHistoryGraph;
 525 extern HWND hPerformancePageMemUsageHistoryGraph;
 526
 527 INT_PTR CALLBACK
 528 GraphCtrl_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 529 {
 530     RECT        rcClient;
 531     HDC            hdc;
 532     PAINTSTRUCT     ps;
 533
 534     switch (message)
 535     {
 536     case WM_ERASEBKGND:
 537         return TRUE;
 538     /*
 539      *  Filter out mouse  & keyboard messages
 540      */
 541     /* case WM_APPCOMMAND: */
 542     case WM_CAPTURECHANGED:
 543     case WM_LBUTTONDBLCLK:
 544     case WM_LBUTTONDOWN:
 545     case WM_LBUTTONUP:
 546     case WM_MBUTTONDBLCLK:
 547     case WM_MBUTTONDOWN:
 548     case WM_MBUTTONUP:
 549     case WM_MOUSEACTIVATE:
 550     case WM_MOUSEHOVER:
 551     case WM_MOUSELEAVE:
 552     case WM_MOUSEMOVE:
 553     /* case WM_MOUSEWHEEL: */
 554     case WM_NCHITTEST:
 555     case WM_NCLBUTTONDBLCLK:
 556     case WM_NCLBUTTONDOWN:
 557     case WM_NCLBUTTONUP:
 558     case WM_NCMBUTTONDBLCLK:
 559     case WM_NCMBUTTONDOWN:
 560     case WM_NCMBUTTONUP:
 561     /* case WM_NCMOUSEHOVER: */
 562     /* case WM_NCMOUSELEAVE: */
 563     case WM_NCMOUSEMOVE:
 564     case WM_NCRBUTTONDBLCLK:
 565     case WM_NCRBUTTONDOWN:
 566     case WM_NCRBUTTONUP:
 567     /* case WM_NCXBUTTONDBLCLK: */
 568     /* case WM_NCXBUTTONDOWN: */
 569     /* case WM_NCXBUTTONUP: */
 570     case WM_RBUTTONDBLCLK:
 571     case WM_RBUTTONDOWN:
 572     case WM_RBUTTONUP:
 573     /* case WM_XBUTTONDBLCLK: */
 574     /* case WM_XBUTTONDOWN: */
 575     /* case WM_XBUTTONUP: */
 576     case WM_ACTIVATE:
 577     case WM_CHAR:
 578     case WM_DEADCHAR:
 579     case WM_GETHOTKEY:
 580     case WM_HOTKEY:
 581     case WM_KEYDOWN:
 582     case WM_KEYUP:
 583     case WM_KILLFOCUS:
 584     case WM_SETFOCUS:
 585     case WM_SETHOTKEY:
 586     case WM_SYSCHAR:
 587     case WM_SYSDEADCHAR:
 588     case WM_SYSKEYDOWN:
 589     case WM_SYSKEYUP:
 590         return 0;
 591
 592     case WM_NCCALCSIZE:
 593         return 0;
 594
 595     case WM_SIZE:
 596         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 597         {
 598             GraphCtrl_Resize(&PerformancePageMemUsageHistoryGraph);
 599             GraphCtrl_InvalidateCtrl(&PerformancePageMemUsageHistoryGraph);
 600         }
 601         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 602         {
 603             GraphCtrl_Resize(&PerformancePageCpuUsageHistoryGraph);
 604             GraphCtrl_InvalidateCtrl(&PerformancePageCpuUsageHistoryGraph);
 605         }
 606         return 0;
 607
 608     case WM_PAINT:
 609         hdc = BeginPaint(hWnd, &ps);
 610         GetClientRect(hWnd, &rcClient);
 611         if (hWnd == hPerformancePageMemUsageHistoryGraph)
 612             GraphCtrl_Paint(&PerformancePageMemUsageHistoryGraph, hWnd, hdc);
 613         if (hWnd == hPerformancePageCpuUsageHistoryGraph)
 614             GraphCtrl_Paint(&PerformancePageCpuUsageHistoryGraph, hWnd, hdc);
 615         EndPaint(hWnd, &ps);
 616         return 0;
 617     }
 618
 619     /*
 620      *  We pass on all non-handled messages
 621      */
 622     return CallWindowProcW(OldGraphCtrlWndProc, hWnd, message, wParam, lParam);
 623 }