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giesCANne/candatagrid.cpp
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#include "candatagrid.h"
#include "ui_candatagrid.h"
#include <QPainter>
#include <QDebug>
#include <QMouseEvent>
#include <QRandomGenerator>
//The program used to generate new colors every time the grid was displayed but that's ugly
//and disorienting. Instead use this list colors I've picked because they're "bright".
//It may need a bit of reorganizing to keep like colors apart and feel free to add some more
//if you want. The program will wrap around if the number of signals in a single message exceeds
//this amount of colors.
//Colors here were generated with: https://colordesigner.io/random-color-generator set to random
//hue bright colors and 40 total colors. I clicked until I kind of liked it.
QVector<QColor> signalColors =
{
QColor(101, 104, 159),
QColor(237, 35, 109),
QColor(216, 53, 221),
QColor(37, 252, 220),
QColor(8, 160, 53),
QColor(226, 111, 11),
QColor(216, 59, 2),
QColor(249, 246, 27),
QColor(214, 21, 34),
QColor(178, 219, 74),
QColor(214, 55, 71),
QColor(80, 198, 206),
QColor(83, 214, 201),
QColor(35, 210, 237),
QColor(25, 170, 105),
QColor(110, 221, 55),
QColor(30, 38, 181),
QColor(79, 124, 209),
QColor(7, 91, 175),
QColor(14, 234, 208),
QColor(125, 45, 168),
QColor(176, 211, 80),
QColor(255, 206, 48),
QColor(202, 226, 93),
QColor(201, 99, 232),
QColor(13, 72, 135),
QColor(32, 45, 219),
QColor(197, 26, 216),
QColor(119, 15, 216),
QColor(97, 18, 150),
QColor(242, 16, 242),
QColor(177, 5, 196),
QColor(214, 10, 102),
QColor(9, 50, 155),
QColor(201, 38, 76),
QColor(202, 234, 72),
QColor(59, 191, 57),
QColor(0, 25, 170),
QColor(7, 186, 93),
QColor(29, 211, 147)
};
CANDataGrid::CANDataGrid(QWidget *parent) :
QWidget(parent),
ui(new Ui::CANDataGrid)
{
ui->setupUi(this);
gridMode = GridMode::CHANGED_BITS;
memset(data, 0, 64);
memset(refData, 0, 64);
memset(usedData, 0, 64);
for (int j = 0; j < 512; j++) usedSignalNum[j] = -1;
bytesToDraw = 8; //default to the old behavior
for (int x = 0; x < 8; x++)
for (int y = 0; y < 64; y++)
textStates[y][x] = GridTextState::NORMAL;
blackBrush = QBrush(Qt::black);
whiteBrush = QBrush(Qt::white);
redBrush = QBrush(Qt::red);
greenBrush = QBrush(Qt::green);
greenHashBrush = QBrush(QColor(0, 0xB6, 0), Qt::BDiagPattern);
blackHashBrush = QBrush(QColor(0, 0, 0), Qt::FDiagPattern);
grayBrush = QBrush(QColor(230,230,230));
xOffset = 0;
yOffset = 0;
}
CANDataGrid::~CANDataGrid()
{
delete ui;
}
GridMode CANDataGrid::getMode()
{
return gridMode;
}
void CANDataGrid::setMode(GridMode mode)
{
gridMode = mode;
}
void CANDataGrid::setBytesToDraw(int num)
{
bytesToDraw = num;
//this->update();
}
void CANDataGrid::mousePressEvent(QMouseEvent *event)
{
QPoint clickedPoint = event->pos();
if (event->button() == Qt::LeftButton)
{
//qDebug() << "Mouse Loc " << clickedPoint;
clickedPoint -= upperLeft;
if (clickedPoint.x() < 0 || clickedPoint.y() < 0)
{
//qDebug() << "Clicked outside the grid";
return;
}
int x = clickedPoint.x() / gridSize.x();
int y = clickedPoint.y() / gridSize.y();
qDebug() << "Grid square clicked " << x << " " << y;
int bitClicked = gridToBitPosition(x, y);
//this control is the ultimate authority on which bit is at which grid so what we're going to do now
//is return the actual bit so everyone else doesn't have to try to calculate it. When someone clicks
//what the parent GUI really cares about is which bit that was.
emit gridClicked(bitClicked);
}
if (event->button() == Qt::MiddleButton) //cycle through the various grid layouts for frame sizes
{
//qDebug() << "Middle Button";
if (bytesToDraw < 9) bytesToDraw = 16;
else if (bytesToDraw < 31) bytesToDraw = 32;
else if (bytesToDraw < 63) bytesToDraw = 64;
else if (bytesToDraw > 32) bytesToDraw = 8;
this->update();
}
//right click is exactly like left click but the emitted signal is different so that
//external code can differentiate which button was pressed
if (event->button() == Qt::RightButton)
{
clickedPoint -= upperLeft;
if (clickedPoint.x() < 0 || clickedPoint.y() < 0)
{
return;
}
int x = clickedPoint.x() / gridSize.x();
int y = clickedPoint.y() / gridSize.y();
int bitClicked = gridToBitPosition(x, y);
emit gridRightClicked(bitClicked);
}
}
void CANDataGrid::setCellTextState(int bitPos, GridTextState state)
{
//textStates has two dimensions but they are NOT X and Y and don't necessarily correspond to X and Y in the grid
int byte = bitPos / 8;
int bit = bitPos & 7;
textStates[byte][bit] = state;
this->update();
}
GridTextState CANDataGrid::getCellTextState(int bitPos)
{
int byte = bitPos / 8;
int bit = bitPos & 7;
return textStates[byte][bit];
}
void CANDataGrid::setSignalNames(int sigIdx, const QString sigName)
{
if (sigIdx < 0) return;
if (sigIdx >= signalNames.size())
{
signalNames.resize(sigIdx * 2);
}
signalNames[sigIdx] = sigName;
}
void CANDataGrid::clearSignalNames()
{
signalNames.clear();
signalNames.resize(40);
}
void CANDataGrid::setUsedSignalNum(int bit, int signal)
{
if (bit < 0) return;
if (bit > 511) return;
usedSignalNum[bit] = signal;
}
int CANDataGrid::getUsedSignalNum(int bit)
{
if (bit < 0) return 0;
if (bit > 511) return 0;
return usedSignalNum[bit];
}
void CANDataGrid::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
paintCommonBeginning();
paintGridCells();
paintCommonEnding();
}
/*
* CAN-FD causes the need to support these sizes: 8, 12, 16, 20, 24, 32, 48, 64 bytes.
* It's probably OK to ignore 12 and just go straight from 8 to 16 where each cell is subdivided in half along the X axis
* Then 12 is just 16 minus some bits that never can get used. Then jump to 32 drawn cells from there. That would be also
* subdividing along the Y axis. Obviously, as before, 24 is just 32 but with unusable bits. Lastly, subdivide X yet again
* so now it's in quarters. This allows for 64 bits (48 is likewise just 64 with unusable bits)
*/
void CANDataGrid::paintCommonBeginning()
{
int x;
painter = new QPainter(this);
viewport = painter->viewport();
neededXDivisions = 8;
neededYDivisions = 8;
int textRestrict = qMax(neededXDivisions, neededYDivisions);
if (bytesToDraw > 8)
{
neededXDivisions = 16;
}
if (bytesToDraw > 16)
{
neededXDivisions = 16;
neededYDivisions = 16;
}
if (bytesToDraw > 32)
{
neededXDivisions = 32;
}
if (gridMode == GridMode::CHANGED_BITS)
{
bigTextSize = qMin(viewport.size().height(), viewport.size().width()) / (textRestrict * 3.25);
smallTextSize = qMin(viewport.size().height(), viewport.size().width()) / (textRestrict * 4.0);
}
if (gridMode == GridMode::SIGNAL_VIEW)
{
bigTextSize = qMin(viewport.size().height(), viewport.size().width()) / (textRestrict * 3.50);
smallTextSize = qMin(viewport.size().height(), viewport.size().width()) / (textRestrict * 5.5);
}
sigNameTextSize = qMin(viewport.size().height(), viewport.size().width()) / (textRestrict * 5.0);
painter->setPen(QPen(QApplication::palette().color(QPalette::Text)));
mainFont.setPixelSize(bigTextSize);
painter->setFont(mainFont);
smallFont.setPixelSize(smallTextSize);
boldFont.setPixelSize(bigTextSize);
boldFont.setBold(true);
sigNameFont.setPixelSize(sigNameTextSize);
smallMetric = new QFontMetrics(sigNameFont);
largeMetric = new QFontMetrics(mainFont);
xOffset = smallMetric->maxWidth();
yOffset = smallMetric->height();
xSpan = viewport.right() - viewport.left() - xOffset;
ySpan = viewport.bottom() - viewport.top() - yOffset;
qDebug() << "XSpan" << xSpan << " YSpan " << ySpan;
xSector = xSpan / neededXDivisions;
ySector = ySpan / neededYDivisions;
qDebug() << "XSector " << xSector << " YSector " << ySector;
nearX = viewport.left() + xOffset;
nearY = viewport.top() + yOffset;
farX = nearX + xSector * neededXDivisions;
farY = nearY + ySector * neededYDivisions;
//painter->setFont(boldFont);
painter->setFont(smallFont);
//draw grid by doing vertical and horizontal lines. This is not needed normally but helps when developing new code. Only uncomment for testing
/*
for (int y = 0; y <= neededYDivisions; y++)
{
painter->drawLine(nearX, nearY + (y * ySector), farX, nearY + (y * ySector) );
}
for (int x = 0; x <= neededXDivisions; x++)
{
painter->drawLine(nearX + (x * xSector), nearY, nearX + (x * xSector), farY);
}
*/
for (x = 0; x < neededXDivisions; x++)
{
int num = (neededXDivisions - 1) - x;
num = num & 7;
painter->drawText(QRect(nearX + (x * xSector), viewport.top(), xSector, viewport.top() + smallMetric->height()), Qt::AlignCenter, QString::number(num));
}
int skip = neededXDivisions / 8;
for (int y = 0; y < neededYDivisions; y++)
{
painter->drawText(QRect(viewport.left() + 2, nearY + (ySector * y), xOffset, ySector), Qt::AlignCenter, QString::number(y * skip));
}
painter->setPen(QPen(Qt::black));
painter->setFont(mainFont);
}
void CANDataGrid::paintGridCells()
{
int x, y, bit;
unsigned char prevByte, thisByte;
bool thisBit, prevBit;
int usedSigNum;
QString prevSigName;
//now, color the bitfield by seeing if a given bit is freshly set/unset in the new data
//compared to the old. Bits that are not set in either are white, bits set in both are black
//bits that used to be set but now are unset are red, bits that used to be unset but now are set
//are green
for (y = 0; y < neededYDivisions; y++)
{
for (x = 0; x < neededXDivisions; x++)
{
int byteIdx = (y * (neededXDivisions / 8) + (x / 8));
thisByte = data[byteIdx];
prevByte = refData[byteIdx];
int bitIdx = ((neededXDivisions - 1) - x) & 7;
bit = (byteIdx * 8) + bitIdx;
thisBit = false;
prevBit = false;
if ((thisByte & (1 << bitIdx)) == (1 << bitIdx)) thisBit = true;
if ((prevByte & (1 << bitIdx)) == (1 << bitIdx)) prevBit = true;
if (thisBit)
{
if (prevBit)
{
if ((signalColors.count() > 0) && (gridMode == GridMode::SIGNAL_VIEW)) painter->setBrush(blackHashBrush);
else painter->setBrush(blackBrush);
}
else
{
if ((signalColors.count() > 0) && (gridMode == GridMode::SIGNAL_VIEW)) painter->setBrush(greenHashBrush);
else painter->setBrush(greenBrush);
}
}
else
{
if (prevBit)
{
painter->setBrush(redBrush);
}
else
{
usedSigNum = -1;
if ((usedData[byteIdx] & (1 << bitIdx)) == (1 << bitIdx))
{
if (gridMode == GridMode::SIGNAL_VIEW) usedSigNum = getUsedSignalNum(bit);
if (usedSigNum == -1)
{
grayBrush = QBrush(QColor(0xB6, 0xB6, 0xB6), Qt::BDiagPattern);
painter->setBrush(grayBrush);
}
else
{
int idx = usedSigNum % signalColors.length(); //can only use as many colors as have been defined
painter->setBrush(QBrush(signalColors[idx]));
}
}
else painter->setBrush(whiteBrush);
}
}
painter->drawRect(nearX + (x * xSector), nearY + (y * ySector), xSector, ySector);
switch (textStates[byteIdx][bitIdx])
{
case GridTextState::NORMAL:
if (thisBit && prevBit) painter->setPen(QPen(Qt::gray));
else painter->setPen(QPen(Qt::black));
painter->setFont(mainFont);
break;
case GridTextState::BOLD_BLUE:
painter->setPen(QPen(Qt::blue));
painter->setFont(boldFont);
break;
case GridTextState::INVERT:
painter->setFont(mainFont);
QColor brushColor = painter->brush().color();
painter->setPen(QColor(255-brushColor.red(), 255-brushColor.green(), 255-brushColor.blue()));
break;
}
//change style of bit number output for current signal
//if (thisBit) painter->setFont(boldFont);
// else painter->setFont(mainFont);
//painter->setFont(smallFont);
if (gridMode != GridMode::SIGNAL_VIEW)
painter->drawText(QRect(nearX + (x * xSector), nearY + (y * ySector), xSector, ySector), Qt::AlignCenter, QString::number(bit)); //center center of grid
else
painter->drawText(QRect(nearX + (x * xSector), nearY + (y * ySector), xSector, ySector), Qt::AlignLeft, QString::number(bit)); //upper left of grid
painter->setFont(mainFont);
painter->setPen(QPen(Qt::black));
}
}
/*
* now if signal names are loaded we'll go through all the bits again and try to label over top of the grid
* We already have a big bitmap that tells us which signals occupy which bits so every time there is a new
* signal look ahead to see if there's room in the row to just run the signal name through as long as needed.
*/
if (signalNames.count() > 0)
{
painter->setFont(sigNameFont);
for (y = 0; y < neededYDivisions; y++)
{
for (x = 0; x < neededXDivisions; x++)
{
int byteIdx = (y * (neededXDivisions / 8) + (x / 8));
int bitIdx = ((neededXDivisions - 1) - x) & 7;
bit = (byteIdx * 8) + bitIdx;
usedSigNum = -1;
if ((usedData[byteIdx] & (1 << bitIdx)) == (1 << bitIdx))
{
usedSigNum = getUsedSignalNum(bit);
if ((usedSigNum > -1) && (prevSigName != signalNames[usedSigNum]) )
{
prevSigName = signalNames[usedSigNum];
int textWidth = smallMetric->horizontalAdvance(prevSigName);
int usableWidth = getSignalRowRun(usedSigNum, bit);
qDebug() << "Width this row: " << usableWidth;
usableWidth *= xSector;
if (textWidth > usableWidth) //signal name is too long for space we've got on this row. Try to wrap it
{
int numAvgChars = xSector / smallMetric->averageCharWidth();
painter->drawText(nearX + x * xSector + 5, nearY + (y * ySector) + smallMetric->height() * 1.6, prevSigName.left(numAvgChars - 1));
QString remainder = prevSigName.mid(numAvgChars - 1, -1);
textWidth = smallMetric->horizontalAdvance(prevSigName);
if (textWidth > xSector)
{
painter->drawText(nearX + x * xSector + 12, nearY + (y * ySector) + smallMetric->height() * 2.6, remainder.left(numAvgChars - 1));
}
else painter->drawText(nearX + x * xSector + 12, nearY + (y * ySector) + smallMetric->height() * 2.6, remainder);
}
else
{
//first see if we even have enough room to use a bigger font and use that if so. Otherwise stick with the normal font
textWidth = largeMetric->horizontalAdvance(prevSigName);
if (textWidth < usableWidth)
{
painter->setFont(mainFont);
QSize size = QSize(usableWidth, ySector - smallMetric->height() * 1.0);
painter->drawText(QRect(nearX + x * xSector, nearY + (y * ySector) + smallMetric->height() * 1.0, size.width(), size.height()), Qt::AlignCenter, prevSigName);
painter->setFont(sigNameFont);
}
else
{
QSize size = QSize(usableWidth, ySector - smallMetric->height() * 1.0);
painter->drawText(QRect(nearX + x * xSector, nearY + (y * ySector) + smallMetric->height() * 1.0, size.width(), size.height()), Qt::AlignCenter, prevSigName);
}
}
}
}
}
}
}
}
//starting at the given coords, go right / increment X until either we hit the end of the signal or the end of the row, whichever is first.
//return how many grid cells that was. The part that sucks is that bits aren't really in "bit" order so you can't just increment the bit number
int CANDataGrid::getSignalRowRun(int sigNum, int startBit)
{
qDebug() << "SigNum: " << sigNum << " startBit " << startBit;
int width = 0;
QPoint gridPt = getGridPointFromBitPosition(startBit);
int x = gridPt.x();
int y = gridPt.y();
for (int xx = x; xx < neededXDivisions; xx++)
{
int bit = gridToBitPosition(xx, y);
if (usedSignalNum[bit] == sigNum) width++;
else return width;
}
return width;
}
void CANDataGrid::paintCommonEnding()
{
//these are used to make it easy to figure out which grid has been clicked on during mousedown events
upperLeft.setX(nearX);
upperLeft.setY(nearY);
gridSize.setX(xSector);
gridSize.setY(ySector);
//and we don't need these anymore after we're done drawing
delete painter;
delete smallMetric;
}
//given a grid cell we return which bit position that is within the CAN frame.
int CANDataGrid::gridToBitPosition(int x, int y)
{
int byteIdx = (y * (neededXDivisions / 8) + (x / 8));
int bitIdx = ((neededXDivisions - 1) - x) & 7;
int bit = (byteIdx * 8) + bitIdx;
return bit;
}
//inverse of above. Given a bit position we calculate where that would be in our grid
QPoint CANDataGrid::getGridPointFromBitPosition(int bitPos)
{
int tempBit = bitPos;
//neededXDivisions tells us how many bits are on a single line.
//From there we can easily determine which Y row we're in with simple division
int y = bitPos / neededXDivisions;
//x is more complicated because the bits go in a sort of stairstep pattern 7654321076543210
tempBit = (bitPos - (neededXDivisions * y));
int x = tempBit & 0xF8; //get the byte offset in the line
x = x + (7- (tempBit & 7)); //reverse the bits in the byte
return QPoint(x, y);
}
void CANDataGrid::saveImage(QString filename, int width, int height)
{
Q_UNUSED(width); //currently unused but I want to use them in the future
Q_UNUSED(height);
//can't quite do the below commented out stuff
//it works but doesn't scale the image into that pixmap. Need to
//figure out how to draw the size of the pixmap
/*
QSize pSize;
if (width == 0) pSize.setWidth(this->size().width());
else pSize.setWidth(width);
if (height == 0) pSize.setHeight(this->size().height());
else pSize.setHeight(height);
QPixmap pixmap(pSize);
*/
QPixmap pixmap(this->size());
this->render(&pixmap);
pixmap.save(filename); //QT will automatically pick the file format given the extension
}
//these next three functions will copy the needed number of bytes from the passed buffer but you'd better have a large enough buffer or they'll get junk
//this probably won't crash the program but it would yield some really strange output. This is only really an issue for CAN-FD traffic. Make sure you
//have large enough buffers!
void CANDataGrid::setReference(unsigned char *newRef, bool bUpdate = true)
{
int bytesToTransfer = (bytesToDraw + 7) & 0xF8; //force copying in 8 byte increments
memcpy(refData, newRef, bytesToTransfer);
//clear all data past that point just to be sure we don't have garbage left over
if (bytesToTransfer < 64) memset(refData + bytesToTransfer, 0, 64 - bytesToTransfer);
if (bUpdate) this->update();
}
void CANDataGrid::updateData(unsigned char *newData, bool bUpdate = true)
{
int bytesToTransfer = (bytesToDraw + 7) & 0xF8; //force copying in 8 byte increments
memcpy(data, newData, bytesToTransfer);
//clear all data past that point just to be sure we don't have garbage left over
if (bytesToTransfer < 64) memset(refData + bytesToTransfer, 0, 64 - bytesToTransfer);
if (bUpdate) this->update();
}
void CANDataGrid::setUsed(unsigned char *newData, bool bUpdate = false)
{
int bytesToTransfer = (bytesToDraw + 7) & 0xF8; //force copying in 8 byte increments
memcpy(usedData, newData, bytesToTransfer);
//clear all data past that point just to be sure we don't have garbage left over
if (bytesToTransfer < 64) memset(refData + bytesToTransfer, 0, 64 - bytesToTransfer);
if (bUpdate) this->update();
}
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