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Refine mouse location calculations

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This commit is contained in:
Matthias Neeracher 2011-09-06 00:22:57 +02:00
parent 3a55714cd3
commit 883c6e35bf
1 changed files with 13 additions and 9 deletions
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20
Sources/VLSheetView.mm
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@ -146,6 +146,16 @@ static float sFlatPos[] = {
return kSystemBaseline+b.origin.y+b.size.height-(system+1)*kSystemH;
}
- (int) systemForPoint:(NSPoint *)loc
{
NSRect b = [self bounds];
CGFloat top = b.origin.y+b.size.height;
int system = (top-loc->y) / kSystemH;
loc->y -= top-(system+1)*kSystemH;
return system;
}
- (int) gridInSection:(int)section withPitch:(int)pitch visual:(uint16_t)visual
{
int key = [self song]->fProperties[section].fKey;
@ -705,20 +715,14 @@ const float kSemiFloor = -1.0f*kLineH;
NSPoint loc = [event locationInWindow];
loc = [self convertPoint:loc fromView:nil];
const int kNumSystems = std::max(2, fLayout->NumSystems());
int system = [self systemForPoint:&loc];
if (loc.y < 0.0f || loc.y >= kNumSystems*kSystemH)
if (system < 0 || system > fLayout->NumSystems())
return fCursorRegion = kRegionNowhere;
const VLSong * song = [self song];
int system =
kNumSystems - static_cast<int>(loc.y / kSystemH) - 1;
if (system >= fLayout->NumSystems())
return fCursorRegion = kRegionNowhere;
const VLSystemLayout & kLayout = (*fLayout)[system];
const float kMeasureW = kLayout.MeasureWidth();
loc.y = fmodf(loc.y, kSystemH);
loc.x -= kLayout.ClefKeyWidth();