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| void DrawBoxOutline(HWND hwnd, POINT ptBeg, POINT ptEnd) {
HDC hdc;
hdc = GetDC(hwnd);
SetROP2(hdc, R2_NOT);
SelectObject(hdc, GetStockObject(NULL_BRUSH));
Rectangle(hdc, ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y);
ReleaseDC(hwnd, hdc);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
HPEN hPen;
HPEN hPenOld;
HBRUSH hBrush;
HBRUSH hBrushOld;
static RECT rect;
static List* pL;
static int cxClient;
static int cyClient;
static POINT ptBeg,ptEnd, ptBoxBeg, ptBoxEnd;
static BOOL fBlocking, fValidBox;
static BOOL isMoving = false;
static HWND hWndEdit;
SCROLLINFO si;
static int xMinScroll = 0;
static int xCurrentScroll = 0;
static int xMaxScroll = 1500;
static int yMinScroll = 0;
static int yCurrentScroll = 0;
static int yMaxScroll = 1000;
switch (message)
{
case WM_CREATE:
hWndEdit = CreateWindow(L"Task7",
NULL,
WS_BORDER | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL,
0, 0, 0, 0,
hWnd,
0,
hInst,
NULL);
si.cbSize = sizeof(si);
si.fMask = SIF_RANGE ;
si.nMin = xMinScroll;
si.nMax = xMaxScroll;
SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);
si.cbSize = sizeof(si);
si.fMask = SIF_RANGE ;
si.nMin = yMinScroll;
si.nMax = yMaxScroll;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
GetClientRect(hWnd, &rect);
pL = new List();
break;
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
int xNewSize, yNewSize;
xCurrentScroll = min(xCurrentScroll, xMaxScroll);
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE;
si.nPage = cxClient;
SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);
yCurrentScroll = min(yCurrentScroll, yMaxScroll);
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE;
si.nPage = cyClient;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
break;
case WM_HSCROLL:{
int xDelta;
int xNewPos;
int yDelta = 0;
switch (LOWORD(wParam)){
case SB_PAGEUP:
xNewPos = 0;
break;
case SB_PAGEDOWN:
xNewPos = xMaxScroll - cxClient;
break;
case SB_LINEUP:
xNewPos = xCurrentScroll - 10;
break;
case SB_LINEDOWN:
xNewPos = xCurrentScroll + 10;
break;
case SB_THUMBPOSITION:
xNewPos = HIWORD(wParam);
break;
default:
xNewPos = xCurrentScroll;
}
xNewPos = max(0, xNewPos);
xNewPos = min(xMaxScroll-cxClient, xNewPos);
if (xNewPos == xCurrentScroll)
break;
xDelta = xNewPos - xCurrentScroll;
xCurrentScroll = xNewPos;
ScrollWindow(hWnd, -xDelta, -yDelta, NULL, NULL);
UpdateWindow(hWnd);
si.cbSize = sizeof(si);
si.fMask = SIF_POS;
si.nPos = xCurrentScroll;
SetScrollInfo(hWnd, SB_HORZ, &si, TRUE);
break;
}
case WM_VSCROLL:{
int xDelta = 0;
int yDelta;
int yNewPos;
switch (LOWORD(wParam)){
case SB_PAGEUP:
yNewPos = 0;
break;
case SB_PAGEDOWN:
yNewPos = yMaxScroll - cyClient;
break;
case SB_LINEUP:
yNewPos = yCurrentScroll - 10;
break;
case SB_LINEDOWN:
yNewPos = yCurrentScroll + 10;
break;
case SB_THUMBPOSITION:
yNewPos = HIWORD(wParam);
break;
default:
yNewPos = yCurrentScroll;
}
yNewPos = max(0, yNewPos);
yNewPos = min(yMaxScroll-cyClient, yNewPos);
if (yNewPos == yCurrentScroll)
break;
yDelta = yNewPos - yCurrentScroll;
yCurrentScroll = yNewPos;
ScrollWindow(hWnd, -xDelta, -yDelta, NULL, NULL);
UpdateWindow(hWnd);
si.cbSize = sizeof(si);
si.fMask = SIF_POS;
si.nPos = yCurrentScroll;
SetScrollInfo(hWnd, SB_VERT, &si, TRUE);
break;
}
break;
case WM_LBUTTONDOWN:{
ptBeg.x =ptEnd.x = LOWORD(lParam);
ptBeg.y = ptEnd.y = HIWORD(lParam);
DrawBoxOutline(hWnd, ptBeg, ptEnd);
SetCapture(hWnd);
SetCursor(LoadCursor(NULL, IDC_CROSS));
fBlocking = TRUE;
return 0;
}
case WM_MOUSEMOVE :
{
if(fBlocking){
SetCursor(LoadCursor(NULL, IDC_CROSS));
DrawBoxOutline(hWnd, ptBeg, ptEnd);
ptEnd.x = LOWORD(lParam);
ptEnd.y = HIWORD(lParam);
DrawBoxOutline(hWnd, ptBeg, ptEnd);
}
return 0;
}
case WM_LBUTTONUP :
{
if(fBlocking){
DrawBoxOutline(hWnd, ptBeg, ptEnd);
Shape* pF = new Rect(ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y);
pL->AddToEnd(pF);
delete pF;
ptBoxBeg = ptBeg;
ptBoxEnd.x = LOWORD(lParam);
ptBoxEnd.y = HIWORD(lParam);
ReleaseCapture();
SetCursor(LoadCursor(NULL, IDC_HELP));
fBlocking = FALSE;
fValidBox = TRUE;
InvalidateRect(hWnd, NULL, TRUE);
}
return 0;
}
case WM_CHAR :
if(fBlocking & wParam == '\x1B'){
DrawBoxOutline(hWnd, ptBeg, ptEnd);
SetCursor(LoadCursor(NULL, IDC_ARROW));
fBlocking = FALSE;
}
return 0;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
if(isMoving){
SetROP2(hdc, R2_XORPEN);
}else{
SetROP2(hdc, R2_COPYPEN);
}
// SetViewportExtEx(hdc, cxClient, cyClient, NULL);
// SetViewportOrgEx(hdc, -xCurrentScroll, -yCurrentScroll, NULL);
pL->show(hdc);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
} |
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