| 390 | |
| 391 | #ifndef MSG_WRAP_TEXT |
| 392 | void |
| 393 | onMSNH_HScroll(HWND hWnd, WPARAM wParam, LPARAM lParam) |
| 394 | { |
| 395 | PNHMessageWindow data; |
| 396 | SCROLLINFO si; |
| 397 | int xInc; |
| 398 | |
| 399 | /* get window data */ |
| 400 | data = (PNHMessageWindow) GetWindowLong(hWnd, GWL_USERDATA); |
| 401 | |
| 402 | ZeroMemory(&si, sizeof(si)); |
| 403 | si.cbSize = sizeof(si); |
| 404 | si.fMask = SIF_PAGE; |
| 405 | GetScrollInfo(hWnd, SB_HORZ, &si); |
| 406 | |
| 407 | switch (LOWORD(wParam)) { |
| 408 | // User clicked shaft left of the scroll box. |
| 409 | |
| 410 | case SB_PAGEUP: |
| 411 | xInc = -(int) si.nPage; |
| 412 | break; |
| 413 | |
| 414 | // User clicked shaft right of the scroll box. |
| 415 | |
| 416 | case SB_PAGEDOWN: |
| 417 | xInc = si.nPage; |
| 418 | break; |
| 419 | |
| 420 | // User clicked the left arrow. |
| 421 | |
| 422 | case SB_LINEUP: |
| 423 | xInc = -1; |
| 424 | break; |
| 425 | |
| 426 | // User clicked the right arrow. |
| 427 | |
| 428 | case SB_LINEDOWN: |
| 429 | xInc = 1; |
| 430 | break; |
| 431 | |
| 432 | // User dragged the scroll box. |
| 433 | |
| 434 | case SB_THUMBTRACK: |
| 435 | xInc = HIWORD(wParam) - data->xPos; |
| 436 | break; |
| 437 | |
| 438 | default: |
| 439 | xInc = 0; |
| 440 | } |
| 441 | |
| 442 | // If applying the horizontal scrolling increment does not |
| 443 | // take the scrolling position out of the scrolling range, |
| 444 | // increment the scrolling position, adjust the position |
| 445 | // of the scroll box, and update the window. |
| 446 | |
| 447 | if (xInc = max(-data->xPos, min(xInc, data->xMax - data->xPos))) { |
| 448 | data->xPos += xInc; |
| 449 | ScrollWindowEx(hWnd, -data->xChar * xInc, 0, (CONST RECT *) NULL, |