@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
int addr = startAddress;
if (addr > SICXE.MAX_ADDR) return;
int y = getInsets().top + lineHeight;
int rows = (getHeight() - getInsets().top - getInsets().bottom) / lineHeight;
for (int row = 0; row < rows; row++) {
// address
int x = getInsets().left + COL_ADDR * charWidth;
g.setColor(Colors.fg);
g.drawString(Conversion.addrToHex(addr), x, y);
// hex and chr
int x1 = getInsets().left + COL_HEX * charWidth;
int x2 = getInsets().left + COL_CHR * charWidth;
for (int col = 0; col < 16; col++) {
// cursor background
if (addr == cursorAddress) {
// hex part
g.setColor(Colors.bg(true, focusOnHex && isFocusOwner()));
g.fillRect(x1 - 2, y - lineHeight + 3, 2 * charWidth + 4, lineHeight);
// chr part
g.setColor(Colors.bg(true, !focusOnHex && isFocusOwner()));
g.fillRect(x2 - 1, y - lineHeight + 3, charWidth + 2, lineHeight);
}
// contents
// hex part
g.setColor(Colors.fg(addr == cursorAddress, focusOnHex && isFocusOwner()));
int b = get(addr);
if (b < 0) return;
char[] ch = {'.'};
if (b >= 0x20 && b < 0x7E) ch[0] = (char) b;
g.drawString(Conversion.byteToHex(b), x1, y);
x1 += 3 * charWidth;
// chr part
g.setColor(Colors.fg(addr == cursorAddress, !focusOnHex && isFocusOwner()));
g.drawChars(ch, 0, 1, x2, y);
x2 += charWidth;
if (++addr > SICXE.MAX_ADDR) return;
}
y += lineHeight;
}
}
@Override
public void keyTyped(KeyEvent e) {
if (e.getKeyChar() == KeyEvent.VK_TAB || e.getKeyChar() == KeyEvent.VK_ENTER) return;
int addr = getCursorAddress();
if (addr > SICXE.MAX_ADDR) return;
if (focusOnHex) {
int val = Conversion.hexToInt(String.valueOf(e.getKeyChar()), -1);
if (val == -1) return;
int b = get(addr);
if (b < 0) return;
if (firstNibble) b = (b & 0x0F) | ((val & 0x0F) << 4);
else b = (b & 0xF0) | (val & 0x0F);
set(addr, b);
firstNibble = !firstNibble;
if (firstNibble) moveCursor(1, 0);
} else {
set(addr, e.getKeyChar());
moveCursor(1, 0);
}
repaint();
}