| 158 | } |
| 159 | |
| 160 | LRESULT CHexControl::OnKeyDown(UINT, WPARAM wParam, LPARAM, BOOL&) { |
| 161 | if (m_Buffer == nullptr) |
| 162 | return 0; |
| 163 | |
| 164 | auto current = m_CaretOffset; |
| 165 | bool abortEdit = false; |
| 166 | bool shift = ::GetKeyState(VK_SHIFT) & 0x80; |
| 167 | bool alt = ::GetKeyState(VK_CONTROL) & 0x80; |
| 168 | |
| 169 | bool redraw = false; |
| 170 | |
| 171 | if (shift) { |
| 172 | if (m_Selection.IsEmpty()) { |
| 173 | // � |
| 174 | m_Selection.SetAnchor(m_CaretOffset); |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | switch (wParam) { |
| 179 | case VK_BACK: |
| 180 | if (m_Selection.IsEmpty()) { |
| 181 | m_Buffer->Delete(m_CaretOffset - 1, m_DataSize); |
| 182 | m_CaretOffset--; |
| 183 | } |
| 184 | else { |
| 185 | m_Buffer->Delete(m_Selection.GetOffset(), m_Selection.GetLength()); |
| 186 | } |
| 187 | RedrawWindow(); |
| 188 | m_NotifyData.hdr.code = HCN_SIZECHANGED; |
| 189 | SendNotify(&m_NotifyData); |
| 190 | return 0; |
| 191 | |
| 192 | case VK_DELETE: |
| 193 | if (m_Selection.IsEmpty()) { |
| 194 | m_Buffer->Delete(m_CaretOffset, m_DataSize); |
| 195 | } |
| 196 | else { |
| 197 | // ɾ��ѡ�е����� |
| 198 | m_Buffer->Delete(m_Selection.GetOffset(), m_Selection.GetLength()); |
| 199 | } |
| 200 | RedrawWindow(); |
| 201 | m_NotifyData.hdr.code = HCN_SIZECHANGED; |
| 202 | SendNotify(&m_NotifyData); |
| 203 | return 0; |
| 204 | |
| 205 | case VK_ESCAPE: |
| 206 | if (m_EditDigits > 0) |
| 207 | abortEdit = true; |
| 208 | break; |
| 209 | |
| 210 | case VK_DOWN: |
| 211 | if (m_CaretOffset + m_BytesPerLine < m_Buffer->GetSize()) |
| 212 | m_CaretOffset += m_BytesPerLine; |
| 213 | else |
| 214 | m_CaretOffset = m_Buffer->GetSize(); |
| 215 | break; |
| 216 | |
| 217 | case VK_UP: |