float distance() const
{
if (!valid()) return 0.0;
return (destPoint() - sourcePoint()).norm();
}
//
/// Paints the DIB onto the window.
//
void
TPictureWindow::Paint(TDC& dc, bool /*erase*/, TRect& /*rect*/)
{
TPointer<TPalette> palette(0);
bool hasPalette = ToBool(dc.GetDeviceCaps(RASTERCAPS) & RC_PALETTE);
TDib* dib = GetDib();
if (dib) {
if (hasPalette) {
palette = new TPalette(*GetDib());
dc.SelectObject(*palette);
dc.RealizePalette();
}
// figure out upper left corner of the client area
//
TRect clientRect(GetClientRect());
TPoint sourcePoint(0, 0);
// adjust the upper left corner for centering picture
//
if (HowToDisplay == Center) {
// determine offsets
//
int offsetX = abs(dib->Width() - clientRect.Width()) / 2;
if (dib->Width() > clientRect.Width())
sourcePoint.x += offsetX;
else
clientRect.Offset(offsetX, 0);
int offsetY = abs(dib->Height() - clientRect.Height()) / 2;
if (dib->Height() > clientRect.Height())
sourcePoint.y += offsetY;
else
clientRect.Offset(0, offsetY);
}
// adjust the lower right corner
//
if (HowToDisplay != Stretch) {
clientRect.bottom = clientRect.top + dib->Height();
clientRect.right = clientRect.left + dib->Width();
// if the picture is larger than screen dimensions,
// adjust the upper left corner.
//
clientRect.top -= sourcePoint.y;
clientRect.left -= sourcePoint.x;
}
// display the dib
//
switch (HowToDisplay) {
case UpperLeft:
case Center:
dc.SetDIBitsToDevice(clientRect, sourcePoint, *dib);
// if(!dc.SetDIBitsToDevice(clientRect, sourcePoint, *dib)){
// TSystemMessage().MessageBox();
// }
break;
case Stretch: {
TRect sourceRect(0, 0, dib->Width(), dib->Height());
dc.StretchDIBits(clientRect, sourceRect, *dib);
break;
}
} // switch HowToDisplay
dc.RestoreObjects();
}
}
gex::Point2 dir() const
{
if (!valid()) gex::Point2(0.0,0.0);
return (destPoint() - sourcePoint()).normalized();
}
