Question

如何在C++ Builder里画线

Answer 1

void __fastcall TForm1::Image1MouseMove(TObject *Sender, TShiftState Shift,
int X, int Y)
{
if(!EditPictureNum)
{
return;
}
if(Shift.Contains(ssLeft))
{
TPenStyle penstyle = Image1-> Canvas-> Pen-> Style;
TPenMode penmode = Image1-> Canvas-> Pen-> Mode;
Image1-> Canvas-> Pen-> Style = psDot ;
Image1-> Canvas-> Pen-> Mode = pmXor ;