LcPainter& DocumentCanvas::cachedPainter(PainterCacheType cacheType) {
double s = 1.;
double x = 0.;
double y = 0.;
if (_cachedPainters.size() != 0) {
LcPainter* p = _cachedPainters.begin()->second;
s = p->scale();
p->getTranslate(&x, &y);
}
if (_cachedPainters.count(cacheType) == 0) {
_cachedPainters[cacheType] = _createPainterFunctor(_deviceWidth, _deviceHeight);
_cachedPainters[cacheType]->scale(s);
_cachedPainters[cacheType]->translate(x, y);
}
return *_cachedPainters[cacheType];
}
void DocumentCanvas::newDeviceSize(unsigned int width, unsigned int height) {
if (_deviceWidth!=width && _deviceHeight!=height) {
_deviceWidth = width;
_deviceHeight = height;
double s = 1.;
double x = 0.;
double y = 0.;
if (_cachedPainters.size() != 0) {
LcPainter* p = _cachedPainters.begin()->second;
s = p->scale();
p->getTranslate(&x, &y);
}
for (auto i = _cachedPainters.begin(); i != _cachedPainters.end(); i++) {
_deletePainterFunctor(i->second);
_cachedPainters[i->first] = _createPainterFunctor(_deviceWidth, _deviceHeight);
_cachedPainters[i->first]->scale(s);
_cachedPainters[i->first]->translate(x, y);
}
}
}
void DocumentCanvas::pan(double move_x, double move_y) {
double pan_x=0.;
double pan_y=0.;
if (_cachedPainters.size() != 0) {
LcPainter* p = _cachedPainters.begin()->second;
p->getTranslate(&pan_x, &pan_y);
}
/* FIXME 100.0 should be dynamically calculated, depends on the drawing speed */
if (std::abs(pan_x-move_x) > 100.0 || std::abs(pan_y - move_y) > 100.0 || pan_x == 0.0 || pan_y == 0.0) {
pan_x = move_x;
pan_y = move_y;
}
for (auto i = _cachedPainters.begin(); i != _cachedPainters.end(); i++) {
LcPainter* p = i->second;
p->translate(move_x - pan_x, move_y - pan_y);
}
pan_x = move_x;
pan_y = move_y;
}
