Preliminaries for the flow view window. The overall form layout is now complete.

candatagrid.cpp

@@ -0,0 +1,69 @@
+#include "candatagrid.h"
+#include "ui_candatagrid.h"
+
+#include <QPainter>
+#include <QDebug>
+
+CANDataGrid::CANDataGrid(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::CANDataGrid)
+{
+    ui->setupUi(this);
+}
+
+CANDataGrid::~CANDataGrid()
+{
+    delete ui;
+}
+
+void CANDataGrid::paintEvent(QPaintEvent *event)
+{
+    int x, y;
+    QPainter painter(this);
+
+    QRect viewport = painter.viewport();
+
+    int xSpan = viewport.right() - viewport.left();
+    int ySpan = viewport.bottom() - viewport.top();
+
+    int xSector = xSpan / 10;
+    int ySector = ySpan / 10;
+
+    //the whole thing is broken up into 100 chunks which are allocated as such:
+    //The entirety of the upper row is taken up by "BITS"
+    //The next row down skips two columns and then has 7 6 5 4 3 2 1 0
+    //The bottom right 64 entries are the grid
+    //The left most column has "BYTES" written vertically down it
+    //the next left most column has "0 1 2 3 4 5 6 7" written down along the grid
+
+    painter.setPen(QPen(Qt::black));
+    QFont theFont;
+    theFont.setPixelSize(qMin(xSector, ySector) - 10);
+    painter.setFont(theFont);
+
+    painter.drawText(QRect(viewport.left(), viewport.top(), xSpan, ySector), Qt::AlignCenter, tr("BITS"));
+
+    for (x = 0; x < 8; x++)
+    {
+        painter.drawText(QRect(viewport.left() + (x+2) * xSector, viewport.top() + ySector, xSector, ySector), Qt::AlignCenter, QString::number(7-x));
+    }
+    for (y = 0; y < 8; y++)
+    {
+        painter.drawText(QRect(viewport.left() + xSector, viewport.top() + ySector * (y + 2), xSector, ySector), Qt::AlignCenter, QString::number(y));
+    }
+
+    painter.drawText(viewport.left() + 10, viewport.top() + ySector * 4, "B");
+    painter.drawText(viewport.left() + 10, viewport.top() + ySector * 5, "Y");
+    painter.drawText(viewport.left() + 10, viewport.top() + ySector * 6, "T");
+    painter.drawText(viewport.left() + 10, viewport.top() + ySector * 7, "E");
+    painter.drawText(viewport.left() + 10, viewport.top() + ySector * 8, "S");
+
+    for (y = 0; y < 8; y++)
+    {
+        for (x = 0; x < 8; x++)
+        {
+            painter.drawRect(viewport.left() + (x+2) * xSector, viewport.top() + (y+2) * ySector, xSector, ySector);
+
+        }
+    }
+}