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//
// memory_view.cpp: CEN64D memory view (MVC).
//
// CEN64D: Cycle-Accurate Nintendo 64 Debugger
// Copyright (C) 2015, Tyler J. Stachecki.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//
#include "memory_view.h"
#include <QBrush>
#include <QFont>
#include <QFontMetrics>
#include <QPainter>
#include <QSize>
#include <cstdio>
MemoryView::MemoryView(unsigned addressOctets) : addressOctets(addressOctets) {
QFont monospacedFont("Courier New");
monospacedFont.setFixedPitch(true);
monospacedFont.setPointSize(10);
setFont(monospacedFont);
QFontMetrics metrics(monospacedFont);
fontWidth = metrics.width('0');
fontHeight = metrics.height();
byteStart = 1 + (3 + addressOctets) * fontWidth;
// Create the format string.
sprintf(formatstr, " 0x%%.%ullX", addressOctets);
}
MemoryView::~MemoryView() {
}
void MemoryView::paintEvent(QPaintEvent* event) {
QSize area = viewport()->size();
char buf[32];
int i, j;
// TODO: Fonts don't seem to render exactly
// where we want them, so add a fudge factor.
float fudge = 2.0 / 3.0;
unsigned start = fontHeight * fudge;
QPainter painter(viewport());
QBrush clear = QBrush(Qt::white);
QBrush shaded = QBrush(QColor(0xE8, 0xE8, 0xE8));
// Shade ever other line.
painter.fillRect(0, 0, area.width(), area.height(), clear);
for (i = fontHeight; i < area.height(); i += fontHeight * 2)
painter.fillRect(0, i, area.width(), fontHeight, shaded);
// Draw any values in the range.
for (i = 0; i < area.height(); i += fontHeight) {
sprintf(buf, formatstr, (unsigned long long) 0 +
(i / fontHeight * bytesPerRow));
painter.drawText(1, start + i, buf);
for (j = 0; j < bytesPerRow; j++) {
sprintf(buf, " %02X ", j);
painter.drawText(byteStart + j * fontWidth * 3, start + i, buf);
buf[1] = '\0';
buf[0] = isprint(j) ? j : '.';
painter.drawText(byteStart + bytesPerRow * 3 * fontWidth +
(j + 1) * fontWidth, start + i, buf);
}
}
}
void MemoryView::resizeEvent(QResizeEvent *event) {
QSize area = viewport()->size();
int i;
// Determine how many bytes we can cram in the row without having
// to resort to horizontal sliders. Make sure that we keep the byte
// count to a power of two for simplicity's sake.
for (bytesPerRow = 1, i = 2; ; i *= 2) {
int check = byteStart + i * 3 * fontWidth + (i + 1) * fontWidth;
if (check > area.width())
break;
bytesPerRow = i;
}
}
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