LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam){
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
Draw Ahmed;
switch (message)
{
case WM_LBUTTONDOWN:
if(!isSecond)
X1 = LOWORD(lParam), Y1 = HIWORD(lParam) , isSecond = true;
else
X2 = LOWORD(lParam) , Y2 = HIWORD(lParam) , InvalidateRect(hWnd, NULL, false);
break;
case WM_COMMAND:
wmId = LOWORD(wParam) , wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId){
case IDM_S:
ss.open("input.in") , tmp.clear() , tmp = var;
while(var.size())
ss << var.front().x1 << " " << var.front().y1 << " " << var.front().x2 << " " <<
var.front().y2 << " " << var.front().P <<"\n" , var.pop_front();
var = tmp , ss.close();
break;
case IDM_O:
clr() , OT = true;
InvalidateRect(hWnd, NULL, true); // draw only a line on the screen
break;
case IDM_DDA_LINE:
clr() , BDDA = 1;
break;
case IDM_MP_LINE:
clr() , BMP = true;
break;
case IDM_MP_CIRCULE:
clr() , MPC = true;
break;
case IDM_CIRC_CART:
clr() , cartizen = true;
break;
case IDM_RES:
RES = true;
isSecond = false;
InvalidateRect(hWnd, NULL, true); // draw only a line on the screen
break;
case IDM_R:
clr() , R = true , InvalidateRect(hWnd , 0 , false);
break;
case IDM_U:
clr() , U = true , InvalidateRect(hWnd , 0 , false);
break;
case IDM_COL:
memset(&color,0,sizeof(color));
color.lStructSize=sizeof(CHOOSECOLOR);
color.hwndOwner=hWnd;
color.lpCustColors=ccref;
color.rgbResult=selcolor;
color.Flags=CC_RGBINIT;
if(ChooseColor(&color))
selcolor=color.rgbResult;
isSecond = false;
break;
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
Ahmed.ps = ps ;
if(OT == true){
ss.open("input.in");
PT tmst;
while(!ss.eof()){
ss >> tmst.x1 >> tmst.y1 >> tmst.x2 >> tmst.y2 >> tmst.P;
if (tmst.P == 'D')
Ahmed.DDA(tmst.x1 , tmst.y1 , tmst.x2 , tmst.y2 , selcolor);
if (tmst.P == 'M')
Ahmed.MidPoint(tmst.x1 , tmst.y1 , tmst.x2 , tmst.y2 , selcolor);
if (tmst.P == 'C')
Ahmed.drawCircle(tmst.x1 , tmst.y1 , Ahmed.Distance(tmst.x1 , tmst.y1 , tmst.x2 , tmst.y2), selcolor);
if(tmst.P == 'Z')
Ahmed.MIDPOINT_CARTISIEAN(tmst.x1, tmst.y1 , Ahmed.Distance(tmst.x1 , tmst.y1 , tmst.x2 , tmst.y2), selcolor);
}
ss.close();
clr() , BDDA = true , X1 = X2 = Y1 = Y2 = 0;
EndPaint(hWnd, &ps);
break;
}
if(U == true){
if(var.size() != 0){
PT t = var.back();
var.pop_back() , var.push_front(t) ;
if (t.P == 'D')
Ahmed.DDA(t.x1 , t.y1 , t.x2 , t.y2 , RGB(250,250,250));
if (t.P == 'M')
Ahmed.MidPoint(t.x1 , t.y1 , t.x2 , t.y2 , RGB(250,250,250));
if (t.P == 'C')
Ahmed.drawCircle(t.x1 , t.y1 , Ahmed.Distance(t.x1,t.y1,t.x2,t.y2), RGB(250,250,250));
if(t.P == 'Z')
Ahmed.MIDPOINT_CARTISIEAN(t.x1, t.y1 , Ahmed.Distance(t.x1 , t.y1 , t.x2 , t.y2), RGB(250,250,250));
}
clr() , BDDA = true , X1 = X2 = Y1 = Y2 = 0;
EndPaint(hWnd, &ps);
break;
}
if(R == true){
if(var.size() != 0){
PT t = var.front();
var.pop_front() , var.push_back(t);
if (t.P == 'D')
Ahmed.DDA(t.x1 , t.y1 , t.x2 , t.y2 , selcolor);
if (t.P == 'M')
Ahmed.MidPoint(t.x1 , t.y1 , t.x2 , t.y2 , selcolor);
if (t.P == 'C')
Ahmed.drawCircle(t.x1 , t.y1 , Ahmed.Distance(t.x1 , t.y1 , t.x2 , t.y2), selcolor);
if(t.P == 'Z')
Ahmed.MIDPOINT_CARTISIEAN(t.x1, t.y1 , Ahmed.Distance(t.x1 , t.y1 , t.x2 , t.y2), selcolor);
}
clr() , BDDA = true , X1 = X2 = Y1 = Y2 = 0;
EndPaint(hWnd, &ps);
break;
}
if(MPC == true)
Ahmed.drawCircle(X1 , Y1 , Ahmed.Distance(X1,Y1,X2,Y2), selcolor) , var.push_back(PT(X1,Y1,X2,Y2,'C'));
if(BDDA == true)
Ahmed.DDA(X1 , Y1 , X2 , Y2 , selcolor) ,var.push_back(PT(X1,Y1,X2,Y2,'D'));
if (BMP == true)
Ahmed.MidPoint(X1 , Y1 , X2 , Y2 , selcolor) ,var.push_back(PT(X1,Y1,X2,Y2,'M'));
if(cartizen == true)
Ahmed.MIDPOINT_CARTISIEAN(X1,Y1 , Ahmed.Distance(X1,Y1,X2,Y2) , selcolor) , var.push_back(PT(X1,Y1,X2,Y2,'Z'));
EndPaint(hWnd, &ps) , isSecond = false;
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
