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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;
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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