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[drape] Match iOS double tap to zoom behavior

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Signed-off-by: eisa01 <eisa01@gmail.com>
This commit is contained in:
Eivind Samseth
2025-08-15 20:00:39 +02:00
committed by Yannik Bloscheck
parent 3097b54036
commit d04327082d
1 changed files with 8 additions and 1 deletions
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9
libs/drape_frontend/user_event_stream.cpp
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@@ -15,6 +15,8 @@
#include "base/macros.hpp"
#include "std/target_os.hpp"
#include <cmath>
#ifdef DEBUG
@@ -1245,8 +1247,13 @@ void UserEventStream::UpdateDoubleTapAndHold(Touch const & touch)
TEST_CALL(DOUBLE_TAP_AND_HOLD);
ASSERT_EQUAL(m_state, STATE_DOUBLE_TAP_HOLD, ());
float const kPowerModifier = 10.0f;
#if defined(OMIM_OS_IPHONE) || defined(OMIM_OS_MAC)
int const kPlatformScaleModifier = -1;
#else
int const kPlatformScaleModifier = 1;
#endif
double const scaleFactor = exp(kPowerModifier * (touch.m_location.y - m_startDoubleTapAndHold.y) /
GetCurrentScreen().PixelRectIn3d().SizeY());
GetCurrentScreen().PixelRectIn3d().SizeY() * kPlatformScaleModifier);
m_startDoubleTapAndHold = touch.m_location;
m2::PointD scaleCenter = m_startDragOrg;