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- Fix crash in pieces downloaded/availability bars when the torrent has too many pieces

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This commit is contained in:
Christophe Dumez
2009-12-31 16:34:56 +00:00
parent 6d88bb5b83
commit b87a23037e
2 changed files with 69 additions and 19 deletions
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47
src/downloadedpiecesbar.h
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@@ -36,6 +36,7 @@
#include <QList>
#include <QPixmap>
#include <libtorrent/bitfield.hpp>
#include <math.h>
using namespace libtorrent;
#define BAR_HEIGHT 18
@@ -59,17 +60,43 @@ public:
pix.fill();
pixmap = pix;
} else {
QPixmap pix = QPixmap(pieces.size(), 1);
pix.fill();
QPainter painter(&pix);
for(uint i=0; i<pieces.size(); ++i) {
if(pieces[i])
painter.setPen(Qt::blue);
else
painter.setPen(Qt::white);
painter.drawPoint(i,0);
int nb_pieces = pieces.size();
// Reduce the number of pieces before creating the pixmap
// otherwise it can crash when there are too many pieces
if(nb_pieces > width()) {
int ratio = floor(nb_pieces/(double)width());
QVector<bool> scaled_pieces;
for(int i=0; i<nb_pieces; i+= ratio) {
bool have = true;
for(int j=i; j<qMin(i+ratio, nb_pieces); ++j) {
if(!pieces[i]) { have = false; break; }
}
scaled_pieces << have;
}
QPixmap pix = QPixmap(scaled_pieces.size(), 1);
pix.fill();
QPainter painter(&pix);
for(int i=0; i<scaled_pieces.size(); ++i) {
if(scaled_pieces[i])
painter.setPen(Qt::blue);
else
painter.setPen(Qt::white);
painter.drawPoint(i,0);
}
pixmap = pix;
} else {
QPixmap pix = QPixmap(pieces.size(), 1);
pix.fill();
QPainter painter(&pix);
for(uint i=0; i<pieces.size(); ++i) {
if(pieces[i])
painter.setPen(Qt::blue);
else
painter.setPen(Qt::white);
painter.drawPoint(i,0);
}
pixmap = pix;
}
pixmap = pix;
}
update();
}