cvs.zerfleddert.de Git - proxmark3-svn/blob - client/proxguiqt.cpp

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2009 Michael Gernoth <michael at gernoth.net>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // GUI (QT)
   9 //-----------------------------------------------------------------------------
  10 #include "proxguiqt.h"
  11
  12 #include <iostream>
  13 #include <QPainterPath>
  14 #include <QBrush>
  15 #include <QPen>
  16 #include <QTimer>
  17 #include <QCloseEvent>
  18 #include <QMouseEvent>
  19 #include <QKeyEvent>
  20 #include <math.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23 #include <QSlider>
  24 #include <QHBoxLayout>
  25 #include <string.h>
  26 #include "proxguiqt.h"
  27 #include "proxgui.h"
  28 #include <QtGui>
  29 //#include <ctime>
  30
  31
  32 int startMax;
  33 int PageWidth;
  34
  35 void ProxGuiQT::ShowGraphWindow(void)
  36 {
  37         emit ShowGraphWindowSignal();
  38 }
  39
  40 void ProxGuiQT::RepaintGraphWindow(void)
  41 {
  42         emit RepaintGraphWindowSignal();
  43 }
  44
  45 void ProxGuiQT::HideGraphWindow(void)
  46 {
  47         emit HideGraphWindowSignal();
  48 }
  49
  50 void ProxGuiQT::_ShowGraphWindow(void)
  51 {
  52         if(!plotapp)
  53                 return;
  54
  55         if (!plotwidget)
  56                 plotwidget = new ProxWidget();
  57
  58         plotwidget->show();
  59 }
  60
  61 void ProxGuiQT::_RepaintGraphWindow(void)
  62 {
  63         if (!plotapp || !plotwidget)
  64                 return;
  65
  66         plotwidget->update();
  67 }
  68
  69 void ProxGuiQT::_HideGraphWindow(void)
  70 {
  71         if (!plotapp || !plotwidget)
  72                 return;
  73
  74         plotwidget->hide();
  75 }
  76
  77 void ProxGuiQT::MainLoop()
  78 {
  79         plotapp = new QApplication(argc, argv);
  80
  81         connect(this, SIGNAL(ShowGraphWindowSignal()), this, SLOT(_ShowGraphWindow()));
  82         connect(this, SIGNAL(RepaintGraphWindowSignal()), this, SLOT(_RepaintGraphWindow()));
  83         connect(this, SIGNAL(HideGraphWindowSignal()), this, SLOT(_HideGraphWindow()));
  84
  85         plotapp->exec();
  86 }
  87
  88 ProxGuiQT::ProxGuiQT(int argc, char **argv) : plotapp(NULL), plotwidget(NULL),
  89         argc(argc), argv(argv)
  90 {
  91 }
  92
  93 ProxGuiQT::~ProxGuiQT(void)
  94 {
  95         if (plotwidget) {
  96                 //plotwidget->close();
  97                 delete plotwidget;
  98                 plotwidget = NULL;
  99         }
 100
 101         if (plotapp) {
 102                 plotapp->quit();
 103                 delete plotapp;
 104                 plotapp = NULL;
 105         }
 106 }
 107
 108 //--------------------
 109 void ProxWidget::applyOperation()
 110 {
 111         printf("ApplyOperation()");
 112         save_restoreGB(1);
 113         memcpy(GraphBuffer, s_Buff, sizeof(int) * GraphTraceLen);
 114         RepaintGraphWindow();
 115
 116 }
 117 void ProxWidget::stickOperation()
 118 {
 119         save_restoreGB(0);
 120         printf("stickOperation()");
 121 }
 122 void ProxWidget::vchange_autocorr(int v)
 123 {
 124         int ans;
 125         ans = AutoCorrelate(GraphBuffer, s_Buff, GraphTraceLen, v, true, false);
 126         printf("vchange_autocorr(w:%d): %d\n", v, ans);
 127         RepaintGraphWindow();
 128 }
 129 void ProxWidget::vchange_askedge(int v)
 130 {
 131         int ans;
 132         //extern int AskEdgeDetect(const int *in, int *out, int len, int threshold);
 133         ans = AskEdgeDetect(GraphBuffer, s_Buff, GraphTraceLen, v);
 134         printf("vchange_askedge(w:%d)\n", v);
 135         RepaintGraphWindow();
 136 }
 137 void ProxWidget::vchange_dthr_up(int v)
 138 {
 139         int down = opsController->horizontalSlider_dirthr_down->value();
 140         directionalThreshold(GraphBuffer, s_Buff, GraphTraceLen, v, down);
 141         printf("vchange_dthr_up(%d)", v);
 142         RepaintGraphWindow();
 143
 144 }
 145 void ProxWidget::vchange_dthr_down(int v)
 146 {
 147         printf("vchange_dthr_down(%d)", v);
 148         int up = opsController->horizontalSlider_dirthr_up->value();
 149         directionalThreshold(GraphBuffer,s_Buff, GraphTraceLen, v, up);
 150         RepaintGraphWindow();
 151
 152 }
 153 ProxWidget::ProxWidget(QWidget *parent, ProxGuiQT *master) : QWidget(parent)
 154 {
 155         this->master = master;
 156         resize(800,500);
 157
 158         /** Setup the controller widget **/
 159
 160         QWidget* controlWidget = new QWidget();
 161         opsController = new Ui::Form();
 162         opsController->setupUi(controlWidget);
 163         //Due to quirks in QT Designer, we need to fiddle a bit
 164         opsController->horizontalSlider_dirthr_down->setMinimum(-128);
 165         opsController->horizontalSlider_dirthr_down->setMaximum(0);
 166         opsController->horizontalSlider_dirthr_down->setValue(-20);
 167
 168
 169         QObject::connect(opsController->pushButton_apply, SIGNAL(clicked()), this, SLOT(applyOperation()));
 170         QObject::connect(opsController->pushButton_sticky, SIGNAL(clicked()), this, SLOT(stickOperation()));
 171         QObject::connect(opsController->horizontalSlider_window, SIGNAL(valueChanged(int)), this, SLOT(vchange_autocorr(int)));
 172         QObject::connect(opsController->horizontalSlider_dirthr_up, SIGNAL(valueChanged(int)), this, SLOT(vchange_dthr_up(int)));
 173         QObject::connect(opsController->horizontalSlider_dirthr_down, SIGNAL(valueChanged(int)), this, SLOT(vchange_dthr_down(int)));
 174         QObject::connect(opsController->horizontalSlider_askedge, SIGNAL(valueChanged(int)), this, SLOT(vchange_askedge(int)));
 175
 176         controlWidget->show();
 177
 178         // Set up the plot widget, which does the actual plotting
 179
 180         plot = new Plot(this);
 181         /*
 182         QSlider* slider = new QSlider(Qt::Horizontal);
 183         slider->setFocusPolicy(Qt::StrongFocus);
 184         slider->setTickPosition(QSlider::TicksBothSides);
 185         slider->setTickInterval(10);
 186         slider->setSingleStep(1);
 187         */
 188         QVBoxLayout *layout = new QVBoxLayout;
 189         //layout->addWidget(slider);
 190         layout->addWidget(plot);
 191         setLayout(layout);
 192         printf("Proxwidget Constructor just set layout\r\n");
 193 }
 194
 195
 196 //----------- Plotting
 197
 198 int Plot::xCoordOf(int i, QRect r )
 199 {
 200         return r.left() + (int)((i - GraphStart)*GraphPixelsPerPoint);
 201 }
 202
 203 int Plot::yCoordOf(int v, QRect r, int maxVal)
 204 {
 205         int z = (r.bottom() - r.top())/2;
 206         return -(z * v) / maxVal + z;
 207 }
 208
 209 int Plot::valueOf_yCoord(int y, QRect r, int maxVal)
 210 {
 211         int z = (r.bottom() - r.top())/2;
 212         return (y-z) * maxVal / z;
 213 }
 214 static const QColor GREEN = QColor(100,255,100);
 215 static const QColor RED   = QColor(255,100,100);
 216 static const QColor BLUE  = QColor(100,100,255);
 217 static const QColor GRAY = QColor(240,240,240);
 218
 219 QColor Plot::getColor(int graphNum)
 220 {
 221         switch (graphNum) {
 222         case 0: return GREEN;  //Green
 223         case 1: return RED;    //Red
 224         case 2: return BLUE;   //Blue
 225         default: return GRAY;  //Gray
 226         }
 227 }
 228
 229 void Plot::PlotDemod(uint8_t *buffer, size_t len, QRect plotRect, QRect annotationRect, QPainter *painter, int graphNum, int plotOffset)
 230 {
 231         if (len == 0 || PlotGridX <= 0) return;
 232         //clock_t begin = clock();
 233         QPainterPath penPath;
 234
 235         int grid_delta_x = PlotGridX;
 236         int first_delta_x = grid_delta_x; //(plotOffset > 0) ? PlotGridX : (PlotGridX +);
 237         if (GraphStart > plotOffset) first_delta_x -= (GraphStart-plotOffset);
 238         int DemodStart = GraphStart;
 239         if (plotOffset > GraphStart) DemodStart = plotOffset;
 240
 241         int BitStart = 0;
 242         // round down
 243         if (DemodStart-plotOffset > 0) BitStart = (int)(((DemodStart-plotOffset)+(PlotGridX-1))/PlotGridX)-1;
 244         first_delta_x += BitStart * PlotGridX;
 245         if (BitStart > len) return;
 246         int delta_x = 0;
 247         int v = 0;
 248         //printf("first_delta_x %i, grid_delta_x %i, DemodStart %i, BitStart %i\n",first_delta_x,grid_delta_x,DemodStart, BitStart);
 249
 250         painter->setPen(getColor(graphNum));
 251         char str[5];
 252   int absVMax = (int)(100*1.05+1);
 253         int x = xCoordOf(DemodStart, plotRect);
 254         int y = yCoordOf((buffer[BitStart]*200-100)*-1,plotRect,absVMax);
 255         penPath.moveTo(x, y);
 256         delta_x = 0;
 257         int clk = first_delta_x;
 258         for(int i = BitStart; i < len && xCoordOf(delta_x+DemodStart, plotRect) < plotRect.right(); i++) {
 259                 for (int ii = 0; ii < (clk) && i < len && xCoordOf(DemodStart+delta_x+ii, plotRect) < plotRect.right() ; ii++ ) {
 260                         x = xCoordOf(DemodStart+delta_x+ii, plotRect);
 261                         v = buffer[i]*200-100;
 262
 263                         y = yCoordOf( v, plotRect, absVMax);
 264
 265                         penPath.lineTo(x, y);
 266
 267                         if(GraphPixelsPerPoint > 10) {
 268                                 QRect f(QPoint(x - 3, y - 3),QPoint(x + 3, y + 3));
 269                                 painter->fillRect(f, QColor(100, 255, 100));
 270                         }
 271                         if (ii == (int)clk/2) {
 272                                 //print label
 273                                 sprintf(str, "%u",buffer[i]);
 274                                 painter->drawText(x-8, y + ((buffer[i] > 0) ? 18 : -6), str);
 275                         }
 276                 }
 277                 delta_x += clk;
 278                 clk = grid_delta_x;
 279         }
 280
 281         //Graph annotations
 282         painter->drawPath(penPath);
 283 }
 284
 285 void Plot::PlotGraph(int *buffer, int len, QRect plotRect, QRect annotationRect, QPainter *painter, int graphNum)
 286 {
 287         if (len == 0) return;
 288         //clock_t begin = clock();
 289         QPainterPath penPath;
 290
 291         startMax = (len - (int)((plotRect.right() - plotRect.left() - 40) / GraphPixelsPerPoint));
 292         if(startMax < 0) {
 293                 startMax = 0;
 294         }
 295         if(GraphStart > startMax) {
 296                 GraphStart = startMax;
 297         }
 298         if (GraphStart > len) return;
 299         int vMin = INT_MAX, vMax = INT_MIN, vMean = 0, v = 0, absVMax = 0;
 300         int sample_index = GraphStart ;
 301         for( ; sample_index < len && xCoordOf(sample_index,plotRect) < plotRect.right() ; sample_index++) {
 302
 303                 v = buffer[sample_index];
 304                 if(v < vMin) vMin = v;
 305                 if(v > vMax) vMax = v;
 306                 vMean += v;
 307         }
 308
 309         vMean /= (sample_index - GraphStart);
 310
 311         if(fabs( (double) vMin) > absVMax) absVMax = (int)fabs( (double) vMin);
 312         if(fabs( (double) vMax) > absVMax) absVMax = (int)fabs( (double) vMax);
 313         absVMax = (int)(absVMax*1.25 + 1);
 314         // number of points that will be plotted
 315         int span = (int)((plotRect.right() - plotRect.left()) / GraphPixelsPerPoint);
 316         // one label every 100 pixels, let us say
 317         int labels = (plotRect.right() - plotRect.left() - 40) / 100;
 318         if(labels <= 0) labels = 1;
 319         int pointsPerLabel = span / labels;
 320         if(pointsPerLabel <= 0) pointsPerLabel = 1;
 321
 322         int x = xCoordOf(GraphStart, plotRect);
 323         int y = yCoordOf(buffer[GraphStart],plotRect,absVMax);
 324         penPath.moveTo(x, y);
 325         for(int i = GraphStart; i < len && xCoordOf(i, plotRect) < plotRect.right(); i++) {
 326
 327                 x = xCoordOf(i, plotRect);
 328                 v = buffer[i];
 329
 330                 y = yCoordOf( v, plotRect, absVMax);//(y * (r.top() - r.bottom()) / (2*absYMax)) + zeroHeight;
 331
 332                 penPath.lineTo(x, y);
 333
 334                 if(GraphPixelsPerPoint > 10) {
 335                         QRect f(QPoint(x - 3, y - 3),QPoint(x + 3, y + 3));
 336                         painter->fillRect(f, QColor(100, 255, 100));
 337                 }
 338         }
 339
 340         painter->setPen(getColor(graphNum));
 341
 342         //Draw y-axis
 343         int xo = 5+(graphNum*40);
 344         painter->drawLine(xo, plotRect.top(),xo, plotRect.bottom());
 345
 346         int vMarkers = (absVMax - (absVMax % 10)) / 5;
 347         int minYDist = 40; //Minimum pixel-distance between markers
 348
 349         char yLbl[20];
 350
 351         int n = 0;
 352         int lasty0 = 65535;
 353
 354         for(int v = vMarkers; yCoordOf(v,plotRect,absVMax) > plotRect.top() && n < 20; v+= vMarkers ,n++)
 355         {
 356                 int y0 = yCoordOf(v,plotRect,absVMax);
 357                 int y1 = yCoordOf(-v,plotRect,absVMax);
 358
 359                 if(lasty0 - y0 < minYDist) continue;
 360
 361                 painter->drawLine(xo-5,y0, xo+5, y0);
 362
 363                 sprintf(yLbl, "%d", v);
 364                 painter->drawText(xo+8,y0+7,yLbl);
 365
 366                 painter->drawLine(xo-5, y1, xo+5, y1);
 367                 sprintf(yLbl, "%d",-v);
 368                 painter->drawText(xo+8, y1+5 , yLbl);
 369                 lasty0 = y0;
 370         }
 371
 372         //Graph annotations
 373         painter->drawPath(penPath);
 374         char str[200];
 375         sprintf(str, "max=%d  min=%d  mean=%d  n=%d/%d  CursorAVal=[%d]  CursorBVal=[%d]",
 376                         vMax, vMin, vMean, sample_index, len, buffer[CursorAPos], buffer[CursorBPos]);
 377         painter->drawText(20, annotationRect.bottom() - 23 - 20 * graphNum, str);
 378
 379         //clock_t end = clock();
 380         //double elapsed_secs = double(end - begin) / CLOCKS_PER_SEC;
 381         //printf("Plot time %f\n", elapsed_secs);
 382 }
 383
 384 void Plot::plotGridLines(QPainter* painter,QRect r)
 385 {
 386         int zeroHeight = r.top() + (r.bottom() - r.top()) / 2;
 387
 388         int i;
 389         int grid_delta_x = (int) (PlotGridX * GraphPixelsPerPoint);
 390         int grid_delta_y = (int) (PlotGridY * GraphPixelsPerPoint);
 391         if ((PlotGridX > 0) && ((PlotGridX * GraphPixelsPerPoint) > 1)) {
 392                 for(i = (GridOffset * GraphPixelsPerPoint); i < r.right(); i += grid_delta_x) {
 393                         painter->drawLine(r.left()+i, r.top(), r.left()+i, r.bottom());
 394                 }
 395         }
 396         if ((PlotGridY > 0) && ((PlotGridY * GraphPixelsPerPoint) > 1)){
 397                 for(i = 0; i < ((r.top() + r.bottom())>>1); i += grid_delta_y) {
 398                         painter->drawLine(r.left(),zeroHeight + i,r.right(),zeroHeight + i);
 399                         painter->drawLine(r.left(),zeroHeight - i,r.right(),zeroHeight - i);
 400                 }
 401         }
 402 }
 403
 404 #define HEIGHT_INFO 60
 405 #define WIDTH_AXES 80
 406
 407 void Plot::paintEvent(QPaintEvent *event)
 408 {
 409         QPainter painter(this);
 410         //QPainterPath penPath, whitePath, greyPath, lightgreyPath, cursorAPath, cursorBPath, cursorCPath, cursorDPath;
 411         //QRect r;
 412         QBrush brush(QColor(100, 255, 100));
 413         QPen pen(QColor(100, 255, 100));
 414
 415         painter.setFont(QFont("Courier New", 10));
 416
 417         if(GraphStart < 0) {
 418                 GraphStart = 0;
 419         }
 420
 421         if (CursorAPos > GraphTraceLen)
 422                 CursorAPos= 0;
 423         if(CursorBPos > GraphTraceLen)
 424                 CursorBPos= 0;
 425         if(CursorCPos > GraphTraceLen)
 426                 CursorCPos= 0;
 427         if(CursorDPos > GraphTraceLen)
 428                 CursorDPos= 0;
 429
 430         QRect plotRect(WIDTH_AXES, 0, width()-WIDTH_AXES, height()-HEIGHT_INFO);
 431         QRect infoRect(0, height()-HEIGHT_INFO, width(), HEIGHT_INFO);
 432
 433         //Grey background
 434         painter.fillRect(rect(), QColor(60, 60, 60));
 435         //Black foreground
 436         painter.fillRect(plotRect, QColor(0, 0, 0));
 437
 438         // center line
 439         int zeroHeight = plotRect.top() + (plotRect.bottom() - plotRect.top()) / 2;
 440         painter.setPen(QColor(100, 100, 100));
 441         painter.drawLine(plotRect.left(), zeroHeight, plotRect.right(), zeroHeight);
 442         // plot X and Y grid lines
 443         plotGridLines(&painter, plotRect);
 444
 445         //Start painting graph
 446         if (showDemod && DemodBufferLen > 8) {
 447                 PlotDemod(DemodBuffer, DemodBufferLen,plotRect,infoRect,&painter,2,g_DemodStartIdx);
 448         }
 449         PlotGraph(s_Buff, GraphTraceLen,plotRect,infoRect,&painter,1);
 450         PlotGraph(GraphBuffer, GraphTraceLen,plotRect,infoRect,&painter,0);
 451         // End graph drawing
 452
 453         //Draw the cursors
 454         if(CursorAPos > GraphStart && xCoordOf(CursorAPos, plotRect) < plotRect.right())
 455         {
 456                 painter.setPen(QColor(255, 255, 0));
 457                 painter.drawLine(xCoordOf(CursorAPos, plotRect),plotRect.top(),xCoordOf(CursorAPos, plotRect),plotRect.bottom());
 458         }
 459         if(CursorBPos > GraphStart && xCoordOf(CursorBPos, plotRect) < plotRect.right())
 460         {
 461                 painter.setPen(QColor(255, 0, 255));
 462                 painter.drawLine(xCoordOf(CursorBPos, plotRect),plotRect.top(),xCoordOf(CursorBPos, plotRect),plotRect.bottom());
 463         }
 464         if(CursorCPos > GraphStart && xCoordOf(CursorCPos, plotRect) < plotRect.right())
 465         {
 466                 painter.setPen(QColor(255, 153, 0)); //orange
 467                 painter.drawLine(xCoordOf(CursorCPos, plotRect),plotRect.top(),xCoordOf(CursorCPos, plotRect),plotRect.bottom());
 468         }
 469         if(CursorDPos > GraphStart && xCoordOf(CursorDPos, plotRect) < plotRect.right())
 470         {
 471                 painter.setPen(QColor(0, 0, 205)); //light blue
 472                 painter.drawLine(xCoordOf(CursorDPos, plotRect),plotRect.top(),xCoordOf(CursorDPos, plotRect),plotRect.bottom());
 473         }
 474
 475         //Draw annotations
 476         char str[200];
 477         sprintf(str, "@%d  dt=%d [%2.2f] zoom=%2.2f  CursorAPos=%d  CursorBPos=%d  GridX=%d  GridY=%d (%s) GridXoffset=%d",
 478                         GraphStart,     CursorBPos - CursorAPos, (CursorBPos - CursorAPos)/CursorScaleFactor,
 479                         GraphPixelsPerPoint,CursorAPos,CursorBPos,PlotGridXdefault,PlotGridYdefault,GridLocked?"Locked":"Unlocked",GridOffset);
 480         painter.setPen(QColor(255, 255, 255));
 481         painter.drawText(20, infoRect.bottom() - 3, str);
 482
 483 }
 484
 485 Plot::Plot(QWidget *parent) : QWidget(parent), GraphStart(0), GraphPixelsPerPoint(1)
 486 {
 487         //Need to set this, otherwise we don't receive keypress events
 488         setFocusPolicy( Qt::StrongFocus);
 489         resize(600, 300);
 490
 491         QPalette palette(QColor(0,0,0,0));
 492         palette.setColor(QPalette::WindowText, QColor(255,255,255));
 493         palette.setColor(QPalette::Text, QColor(255,255,255));
 494         palette.setColor(QPalette::Button, QColor(100, 100, 100));
 495         setPalette(palette);
 496         setAutoFillBackground(true);
 497         CursorAPos = 0;
 498         CursorBPos = 0;
 499
 500         setWindowTitle(tr("Sliders"));
 501 }
 502
 503 void Plot::closeEvent(QCloseEvent *event)
 504 {
 505         event->ignore();
 506         this->hide();
 507 }
 508
 509 void Plot::mouseMoveEvent(QMouseEvent *event)
 510 {
 511         int x = event->x();
 512         x -= WIDTH_AXES;
 513         x = (int)(x / GraphPixelsPerPoint);
 514         x += GraphStart;
 515         if((event->buttons() & Qt::LeftButton)) {
 516                 CursorAPos = x;
 517         } else if (event->buttons() & Qt::RightButton) {
 518                 CursorBPos = x;
 519         }
 520
 521
 522         this->update();
 523 }
 524
 525 void Plot::keyPressEvent(QKeyEvent *event)
 526 {
 527         int     offset;
 528         int     gridchanged;
 529
 530         gridchanged= 0;
 531
 532         if(event->modifiers() & Qt::ShiftModifier) {
 533                 if (PlotGridX)
 534                         offset= PageWidth - (PageWidth % PlotGridX);
 535                 else
 536                         offset= PageWidth;
 537         } else
 538                 if(event->modifiers() & Qt::ControlModifier)
 539                         offset= 1;
 540                 else
 541                         offset= (int)(20 / GraphPixelsPerPoint);
 542
 543         switch(event->key()) {
 544                 case Qt::Key_Down:
 545                         if(GraphPixelsPerPoint <= 50) {
 546                                 GraphPixelsPerPoint *= 2;
 547                         }
 548                         break;
 549
 550                 case Qt::Key_Up:
 551                         if(GraphPixelsPerPoint >= 0.02) {
 552                                 GraphPixelsPerPoint /= 2;
 553                         }
 554                         break;
 555
 556                 case Qt::Key_Right:
 557                         if(GraphPixelsPerPoint < 20) {
 558                                 if (PlotGridX && GridLocked && GraphStart < startMax){
 559                                         GridOffset -= offset;
 560                                         GridOffset %= PlotGridX;
 561                                         gridchanged= 1;
 562                                 }
 563                                 GraphStart += offset;
 564                         } else {
 565                                 if (PlotGridX && GridLocked && GraphStart < startMax){
 566                                         GridOffset--;
 567                                         GridOffset %= PlotGridX;
 568                                         gridchanged= 1;
 569                                 }
 570                                 GraphStart++;
 571                         }
 572                         if(GridOffset < 0) {
 573                                 GridOffset += PlotGridX;
 574                         }
 575                         if (gridchanged)
 576                                 if (GraphStart > startMax) {
 577                                         GridOffset += (GraphStart - startMax);
 578                                         GridOffset %= PlotGridX;
 579                                 }
 580                         break;
 581
 582                 case Qt::Key_Left:
 583                         if(GraphPixelsPerPoint < 20) {
 584                                 if (PlotGridX && GridLocked && GraphStart > 0){
 585                                         GridOffset += offset;
 586                                         GridOffset %= PlotGridX;
 587                                         gridchanged= 1;
 588                                 }
 589                                 GraphStart -= offset;
 590                         } else {
 591                                 if (PlotGridX && GridLocked && GraphStart > 0){
 592                                         GridOffset++;
 593                                         GridOffset %= PlotGridX;
 594                                         gridchanged= 1;
 595                                 }
 596                                 GraphStart--;
 597                         }
 598                         if (gridchanged){
 599                                 if (GraphStart < 0)
 600                                         GridOffset += GraphStart;
 601                                 if(GridOffset < 0)
 602                                         GridOffset += PlotGridX;
 603                         GridOffset %= PlotGridX;
 604                         }
 605                         break;
 606
 607                 case Qt::Key_G:
 608                         if(PlotGridX || PlotGridY) {
 609                                 PlotGridX= 0;
 610                                 PlotGridY= 0;
 611                         } else {
 612                                 PlotGridX= PlotGridXdefault;
 613                                 PlotGridY= PlotGridYdefault;
 614                                 }
 615                         break;
 616
 617                 case Qt::Key_H:
 618                         puts("Plot Window Keystrokes:\n");
 619                         puts(" Key                      Action\n");
 620                         puts(" DOWN                     Zoom in");
 621                         puts(" G                        Toggle grid display");
 622                         puts(" H                        Show help");
 623                         puts(" L                        Toggle lock grid relative to samples");
 624                         puts(" LEFT                     Move left");
 625                         puts(" <CTL>LEFT                Move left 1 sample");
 626                         puts(" <SHIFT>LEFT              Page left");
 627                         puts(" LEFT-MOUSE-CLICK         Set yellow cursor");
 628                         puts(" Q                        Hide window");
 629                         puts(" RIGHT                    Move right");
 630                         puts(" <CTL>RIGHT               Move right 1 sample");
 631                         puts(" <SHIFT>RIGHT             Page right");
 632                         puts(" RIGHT-MOUSE-CLICK        Set purple cursor");
 633                         puts(" UP                       Zoom out");
 634                         puts("");
 635                         puts("Use client window 'data help' for more plot commands\n");
 636                         break;
 637
 638                 case Qt::Key_L:
 639                         GridLocked= !GridLocked;
 640                         break;
 641
 642                 case Qt::Key_Q:
 643                         this->hide();
 644                         break;
 645
 646                 default:
 647                         QWidget::keyPressEvent(event);
 648                         return;
 649                         break;
 650         }
 651
 652         this->update();
 653 }