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- #include <Windows.h>
- #include <Winuser.h>
- #include <strsafe.h>
- #include "SysMets.h"
- #define LINEHEIGHT 15
- LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
- int WINAPI WinMain(HINSTANCE hInstance,
- HINSTANCE hPrevInstance,
- LPSTR lpCmdLine,
- int nShowCmd) {
- static TCHAR szAppName[] = TEXT("Bill");
- HWND hwnd;
- WNDCLASS wndclass;
- MSG msg;
- wndclass.cbClsExtra = 0;
- wndclass.cbWndExtra = 0;
- wndclass.hInstance = hInstance;
- wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
- wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
- wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
- wndclass.lpszClassName = szAppName;
- wndclass.lpszMenuName = NULL;
- wndclass.lpfnWndProc = WndProc;
- wndclass.style = CS_HREDRAW | CS_VREDRAW;
- RegisterClass(&wndclass);
- hwnd = CreateWindow(TEXT("Bill"), TEXT("Tip"), WS_OVERLAPPEDWINDOW | WS_HSCROLL | WS_VSCROLL,
- CW_USEDEFAULT, 40, 400, 100,
- NULL, NULL, hInstance, NULL);
- ShowWindow(hwnd, nShowCmd);
- UpdateWindow(hwnd);
- while (GetMessage(&msg, NULL, 0, 0)) {
- TranslateMessage(&msg);
- DispatchMessage(&msg);
- }
- return 0;
- }
- LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
- WPARAM wParam, LPARAM lParam) {
- HDC hdc;
- SCROLLINFO si;
- PAINTSTRUCT ps;
- RECT rect;
- TCHAR szBuffer[128];
- TEXTMETRIC tm;
- static int cxChar, cxCaps, cyChar;
- static int cxClient, cyClient, iMaxWidth;
- int i, x, y, iVscrollPos, iVertPos, iHorzPos, iPaintBeg, iPaintEnd;
- size_t len;
- switch (message) {
- case WM_CREATE:
- hdc = GetDC(hwnd);
- GetTextMetrics(hdc, &tm);
- cxChar = tm.tmAveCharWidth;
- cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;
- cyChar = tm.tmHeight + tm.tmExternalLeading;
- ReleaseDC(hwnd, hdc);
- iMaxWidth = 40 * cxChar + 22 * cxCaps;
- return 0;
- case WM_VSCROLL:
- si.cbSize = sizeof(si);
- si.fMask = SIF_ALL;
- GetScrollInfo(hwnd, SB_VERT, &si);
- iVertPos = si.nPos;
- switch (LOWORD(wParam)) {
- case SB_TOP:
- si.nPos = si.nMin;
- break;
- case SB_BOTTOM:
- si.nPos = si.nMax;
- break;
- case SB_LINEDOWN:
- si.nPos += 1;
- break;
- case SB_LINEUP:
- si.nPos -= 1;
- break;
- case SB_PAGEDOWN:
- si.nPos += si.nPage;
- break;
- case SB_PAGEUP:
- si.nPos -= si.nPage;
- break;
- case SB_THUMBPOSITION:
- si.nPos = si.nTrackPos;
- break;
- default:
- break;
- }
- if (iVertPos != si.nPos) {
- si.fMask = SIF_POS;
- SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
- ScrollWindow(hwnd, 0, cyChar * (iVertPos - si.nPos),
- NULL, NULL);
- InvalidateRect(hwnd, NULL, TRUE);
- UpdateWindow(hwnd);
- }
- return 0;
- case WM_HSCROLL:
- si.cbSize = sizeof(si);
- si.fMask = SIF_ALL;
- GetScrollInfo(hwnd, SB_HORZ, &si);
- iHorzPos = si.nPos;
- switch (LOWORD(wParam)) {
- case SB_LINELEFT:
- si.nPos -= 1;
- break;
- case SB_LINERIGHT:
- si.nPos += 1;
- break;
- case SB_PAGELEFT:
- si.nPos -= si.nPage;
- break;
- case SB_PAGERIGHT:
- si.nPos += si.nPage;
- break;
- case SB_THUMBPOSITION:
- si.nPos = si.nTrackPos;
- default:
- break;
- }
- if (iHorzPos != si.nPos) {
- si.fMask = SIF_POS;
- SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
- ScrollWindow(hwnd, cxChar * (iHorzPos - si.nPos), 0, NULL, NULL);
- InvalidateRect(hwnd, NULL, TRUE);
- UpdateWindow(hwnd);
- }
- return 0;
- case WM_PAINT:
- hdc = BeginPaint(hwnd, &ps);
- si.cbSize = sizeof(si);
- si.fMask = SIF_POS;
- GetScrollInfo(hwnd, SB_VERT, &si);
- iVertPos = si.nPos;
- GetScrollInfo(hwnd, SB_HORZ, &si);
- iHorzPos = si.nPos;
- iPaintBeg = max(0, iVertPos + ps.rcPaint.top / cyChar);
- iPaintEnd = min(NUMLINES - 1,
- iVertPos + ps.rcPaint.bottom / cyChar);
- for (i = iPaintBeg; i <= iPaintEnd; i++) {
- StringCchLength(sysmetrics<i>.szLabel, 1024, &len);
- TextOut(hdc, 0, (i - iPaintBeg) * cyChar, sysmetrics<i>.szLabel, len);
- StringCchLength(sysmetrics<i>.szDesc, 1024, &len);
- TextOut(hdc, 22 * cxCaps, (i - iPaintBeg) * cyChar, sysmetrics<i>.szDesc, len);
- SetTextAlign(hdc, TA_RIGHT | TA_TOP);
- StringCchPrintf(szBuffer, 10, TEXT("%5d"), GetSystemMetrics(sysmetrics<i>.iIndex));
- StringCchLength(szBuffer, 10, &len);
- TextOut(hdc, 22 * cxCaps + 40 * cxChar, (i - iPaintBeg) * cyChar, szBuffer, len);
- SetTextAlign(hdc, TA_LEFT | TA_TOP);
- }
- EndPaint(hwnd, &ps);
- return 0;
- case WM_SIZE:
- cxClient = LOWORD(lParam);
- cyClient = HIWORD(lParam);
- si.cbSize = sizeof(si);
- si.fMask = SIF_RANGE | SIF_PAGE;
- si.nMin = 0;
- si.nMax = NUMLINES - 1;
- si.nPage = cyClient / cyChar;
- SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
- si.cbSize = sizeof(si);
- si.fMask = SIF_RANGE | SIF_PAGE;
- si.nMin = 0;
- si.nMax = 2 + iMaxWidth / cxChar;
- si.nPage = cxClient / cxChar;
- SetScrollInfo(hwnd, SB_HORZ, &si, TRUE);
- return 0;
- case WM_KEYDOWN:
- switch (wParam) {
- case VK_DOWN:
- SendMessage(hwnd, WM_VSCROLL, SB_LINEDOWN, 0);
- break;
- case VK_UP:
- SendMessage(hwnd, WM_VSCROLL, SB_LINEUP, 0);
- break;
- case VK_HOME:
- SendMessage(hwnd, WM_VSCROLL, SB_TOP, 0);
- break;
- case VK_END:
- SendMessage(hwnd, WM_VSCROLL, SB_BOTTOM, 0);
- break;
- case VK_PRIOR:
- SendMessage(hwnd, WM_VSCROLL, SB_PAGEUP, 0);
- break;
- case VK_NEXT:
- SendMessage(hwnd, WM_VSCROLL, SB_PAGEDOWN, 0);
- break;
- default:
- break;
- }
- return 0;
- case WM_DESTROY:
- PostQuitMessage(0);
- return 0;
- default:
- return DefWindowProc(hwnd, message, wParam, lParam);
- }
- }
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