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#5648 Fixed mouse drift by switching from int to float

This commit is contained in:
Steve Williams 2018-03-05 13:43:47 +00:00 committed by Jamie Newbon
parent 0e7fef7ceb
commit 2bbfe450ae
2 changed files with 22 additions and 8 deletions
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2
src/lib/platform/OSXScreen.h
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@ -118,7 +118,7 @@ private:
void sendClipboardEvent(Event::Type type, ClipboardID id) const;
// message handlers
bool onMouseMove(SInt32 mx, SInt32 my);
bool onMouseMove(CGFloat mx, CGFloat my);
// mouse button handler. pressed is true if this is a mousedown
// event, false if it is a mouseup event. macButton is the index
// of the button pressed using the mac button mapping.

28
src/lib/platform/OSXScreen.mm
View File

@ -1080,20 +1080,20 @@ OSXScreen::handleSystemEvent(const Event& event, void*)
}
bool
OSXScreen::onMouseMove(SInt32 mx, SInt32 my)
OSXScreen::onMouseMove(CGFloat mx, CGFloat my)
{
LOG((CLOG_DEBUG2 "mouse move %+d,%+d", mx, my));
LOG((CLOG_DEBUG2 "mouse move %+f,%+f", mx, my));
SInt32 x = mx - m_xCursor;
SInt32 y = my - m_yCursor;
CGFloat x = mx - m_xCursor;
CGFloat y = my - m_yCursor;
if ((x == 0 && y == 0) || (mx == m_xCenter && mx == m_yCenter)) {
return true;
}
// save position to compute delta of next motion
m_xCursor = mx;
m_yCursor = my;
m_xCursor = (SInt32)mx;
m_yCursor = (SInt32)my;
if (m_isOnScreen) {
// motion on primary screen
@ -1122,7 +1122,21 @@ OSXScreen::onMouseMove(SInt32 mx, SInt32 my)
}
else {
// send motion
sendEvent(m_events->forIPrimaryScreen().motionOnSecondary(), MotionInfo::alloc(x, y));
// Accumulate together the move into the running total
static CGFloat m_xFractionalMove = 0;
static CGFloat m_yFractionalMove = 0;
m_xFractionalMove += x;
m_yFractionalMove += y;
// Return the integer part
SInt32 intX = (SInt32)m_xFractionalMove;
SInt32 intY = (SInt32)m_yFractionalMove;
// And keep only the fractional part
m_xFractionalMove -= intX;
m_yFractionalMove -= intY;
sendEvent(m_events->forIPrimaryScreen().motionOnSecondary(), MotionInfo::alloc(intX, intY));
}
}