void CAboutDlg::OnPaint()
{
CPaintDC dc(this);
if (m_pic) {
CRect rect;
GetClientRect(&rect);
int sx = (rect.Width() - m_pic->GetWidth()) / 2;
int sy = 0;
CRect picRect(sx, sy, sx + m_pic->GetWidth(), sy + m_pic->GetHeight());
m_pic->Draw(dc, picRect);
}
}
//--------------------------------------------------------------------
void InterView::Draw(BRect updateRect)
{
BRect visi(Bounds());
if (curPicture != NULL)
{
BRect picRect(curPicture->Bounds());
BRect viewRect(visi);
if (autoScale)
{
viewRect.right -= B_V_SCROLL_BAR_WIDTH;
viewRect.bottom -= B_H_SCROLL_BAR_HEIGHT;
float dx = picRect.right / viewRect.right;
float dy = picRect.bottom / viewRect.bottom;
if (dx > dy)
{
float old_height = viewRect.bottom;
viewRect.bottom = (picRect.bottom / picRect.right) * viewRect.right;
viewRect.OffsetBy(0., old_height/2 - viewRect.bottom/2);
FillRect(BRect(0., 0., viewRect.right, viewRect.top-1));
FillRect(BRect(0., viewRect.bottom, viewRect.right, visi.bottom));
zoomFactor = 1./dx;
SendZoomFactorModified();
}
else
{
float old_width = viewRect.right;
viewRect.right = (picRect.right / picRect.bottom) * viewRect.bottom;
viewRect.OffsetBy(old_width/2 - viewRect.right/2, 0.);
FillRect(BRect(0., viewRect.top, viewRect.left-1, viewRect.bottom));
FillRect(BRect(viewRect.right+1, viewRect.top, visi.right, viewRect.bottom));
zoomFactor = 1./dy;
SendZoomFactorModified();
}
DrawBitmap(curPicture, viewRect);
}
else
{
if (zoomFactor == 1.)
{
BPoint pos(viewRect.right/2 - picRect.right/2 - B_V_SCROLL_BAR_WIDTH/2,
viewRect.bottom/2 - picRect.bottom/2 - B_H_SCROLL_BAR_HEIGHT/2);
if (pos.x < 0.)
pos.x = -xOffs;
else xOffs = 0.;
// pos.x = 0;
if (pos.y < 0.)
pos.y = -yOffs;
else yOffs = 0.;
// pos.y = 0;
DrawBitmap(curPicture, pos);
FillRect(BRect(0., 0., visi.right, pos.y-1));
FillRect(BRect(0., visi.bottom - pos.y - B_H_SCROLL_BAR_HEIGHT + 1, visi.right, visi.bottom));
FillRect(BRect(0., pos.y, pos.x-1, visi.bottom-pos.y));
FillRect(BRect(visi.right-pos.x-B_V_SCROLL_BAR_WIDTH+1, pos.y, visi.right, visi.bottom-pos.y));
}
else
{
picRect.right *= zoomFactor;
picRect.bottom *= zoomFactor;
BRect srcR(curPicture->Bounds());
BRect dstR(viewRect.right/2 - picRect.right/2 - B_V_SCROLL_BAR_WIDTH/2,
viewRect.bottom/2 - picRect.bottom/2 - B_H_SCROLL_BAR_HEIGHT/2,
viewRect.right/2 + picRect.right/2 + B_V_SCROLL_BAR_WIDTH/2,
viewRect.bottom/2 + picRect.bottom/2 + B_H_SCROLL_BAR_HEIGHT/2);
if (dstR.left < 0.) // pic wider than view
{
dstR.left = 0.;
dstR.right = visi.right - B_V_SCROLL_BAR_WIDTH;
srcR.left = picRect.left + xOffs/zoomFactor;
srcR.right = picRect.left + xOffs/zoomFactor + (visi.right - B_V_SCROLL_BAR_WIDTH)/zoomFactor;
}
else xOffs = 0.;
if (dstR.top < 0.) // pic higher than view
{
dstR.top = 0.;
dstR.bottom = visi.bottom - B_H_SCROLL_BAR_HEIGHT;
srcR.top = picRect.top + yOffs/zoomFactor;
srcR.bottom = picRect.top + yOffs/zoomFactor + (visi.bottom - B_H_SCROLL_BAR_HEIGHT)/zoomFactor;
}
else yOffs = 0.;
DrawBitmap(curPicture, srcR, dstR);
FillRect(BRect(0., 0., visi.right, dstR.top-1)); // top
FillRect(BRect(0., dstR.bottom+1, visi.right, visi.bottom)); // bottom
FillRect(BRect(0., dstR.top, dstR.left-1, dstR.bottom)); // left
FillRect(BRect(dstR.right+1, dstR.top, visi.right, dstR.bottom)); // right
}
}
}
else
FillRect(Bounds());
}