Method DoPaint

WinArk/HexControl.cpp:4–125

#include "HexControl.h"

void CHexControl::DoPaint(CDCHandle dc, RECT& rect) {
	auto back = m_ReadOnly ? RGB(192, 192, 192) : m_Colors.Background;
	dc.FillSolidRect(&rect, back);
	if (!m_Buffer)
		return;

	SCROLLINFO si;
	si.cbSize = sizeof(si);
	si.fMask = SIF_POS;
	GetScrollInfo(SB_HORZ, &si);
	int xstart = -si.nPos * m_CharWidth;

	dc.SelectFont(m_Font);
	dc.SetBkMode(OPAQUE);
	dc.SetBkColor(back);

	WCHAR str[20];
	int i = 0;
	uint8_t data[512];
	POLYTEXT poly[128] = { 0 };

	int addrLenth = m_AddressDigits;
	const std::wstring addrFormat = L"%0" + std::to_wstring(addrLenth) + L"X";
	int x = (addrLenth + 1) * m_CharWidth;

	// data
	m_Text.clear();
	int lines = 1;
	std::wstring format(L"%0" + std::to_wstring(m_DataSize * 2) + L"llX ");
	int factor = m_CharWidth * (m_DataSize * 2 + 1);
	for (int y = 0;; y++) {
		auto offset = m_StartOffset + i;
		int count = m_Buffer->GetData(offset, data, m_BytesPerLine);
		if (count == 0)
			break;
		if (m_EditDigits > 0 && m_CaretOffset >= offset && m_CaretOffset < offset + m_BytesPerLine) {
			// change data
			memcpy(data + m_CaretOffset - offset, &m_CurrentInput, m_DataSize);
		}
		int jcount = std::min<int>(m_BytesPerLine / m_DataSize, count);
		for (int j = 0; j < jcount; j++) {
			if (offset + j * m_DataSize >= m_EndOffset)
				break;
			auto ds = int(m_EndOffset - offset - j * m_DataSize);
			ATLASSERT(ds >= 1);
			if (ds > m_DataSize)
				ds = m_DataSize;
			if (ds & (ds - 1))
				ds = m_DataSize >> 1;

			switch (ds)
			{
				case 1: ::StringCchPrintf(str, _countof(str), L"%02X", data[j * m_DataSize]); break;
				case 2:	::StringCchPrintf(str, _countof(str), L"%04X", *(WORD*)&data[j * m_DataSize]); break;
				case 4:	::StringCchPrintf(str, _countof(str), L"%08X", *(DWORD*)&data[j * m_DataSize]); break;
				case 8:	::StringCchPrintf(str, _countof(str), L"%0llX", *(DWORD64*)&data[j * m_DataSize]); break;
			}
			bool selected = m_Selection.IsSelected(offset + j);