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Added: Smooth scrolling

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--HG--
branch : develop
This commit is contained in:
Nimetu 2015-12-06 16:38:29 +02:00
parent cb94cb4f9f
commit 8f87990a1b
2 changed files with 56 additions and 3 deletions
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5
code/nel/include/nel/gui/group_scrolltext.h
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@ -66,6 +66,8 @@ namespace NLGUI
// from CCtrlBase // from CCtrlBase
virtual void elementCaptured(CCtrlBase *capturedElement); virtual void elementCaptured(CCtrlBase *capturedElement);
// setup vertical scrolling event
void smoothScrollY (sint32 dy);
REFLECT_EXPORT_START(CGroupScrollText, CInterfaceGroup) REFLECT_EXPORT_START(CGroupScrollText, CInterfaceGroup)
REFLECT_EXPORT_END REFLECT_EXPORT_END
@ -78,6 +80,9 @@ namespace NLGUI
bool _Settuped; bool _Settuped;
bool _InvertScrollBar; bool _InvertScrollBar;
sint32 _ListHeight; sint32 _ListHeight;
bool _Scrolling;
float _ScrollDistance;
bool _ClockMsgEventRegistered;
protected: protected:
void setup(); void setup();
void updateScrollBar(); void updateScrollBar();

54
code/nel/src/gui/group_scrolltext.cpp
View file

@ -40,8 +40,11 @@ namespace NLGUI
_Settuped(false), _Settuped(false),
_InvertScrollBar(true), _InvertScrollBar(true),
_ListHeight(0), _ListHeight(0),
_Scrolling(false),
_ScrollDistance(0),
_ClockMsgEventRegistered(false),
_StartHeight(0), _StartHeight(0),
_EllapsedTime(0) _EllapsedTime(0)
{ {
_IsGroupScrollText = true; _IsGroupScrollText = true;
} }
@ -166,18 +169,63 @@ namespace NLGUI
{ {
if (isIn(eventDesc.getX(), eventDesc.getY())) if (isIn(eventDesc.getX(), eventDesc.getY()))
{ {
sint32 h = _List->getMaxHReal() / 2; // limit scroll to 100px with single wheel event
sint32 h = std::min(100, _List->getMaxHReal() / 2);
if (h == 0) h = 1; if (h == 0) h = 1;
_ScrollBar->moveTargetY(- eventDesc.getWheel() * h);
smoothScrollY(- eventDesc.getWheel() * h);
return true; return true;
} }
} }
} }
} }
if (event.getType() == NLGUI::CEventDescriptor::system)
{
if (_Scrolling && _ScrollBar)
{
float dy = _ScrollDistance / 4;
if ((sint32) dy != 0)
{
_ScrollBar->moveTargetY(dy);
_ScrollDistance -= dy;
}
else
{
_Scrolling = false;
if (_ClockMsgEventRegistered)
{
_ClockMsgEventRegistered = false;
CWidgetManager::getInstance()->unregisterClockMsgTarget(this);
}
}
}
}
if (CInterfaceGroup::handleEvent(event)) return true; if (CInterfaceGroup::handleEvent(event)) return true;
return false; return false;
} }
//========================================================================
void CGroupScrollText::smoothScrollY(sint32 dy)
{
if (!_Scrolling)
{
_Scrolling = true;
_ScrollDistance = 0;
// register for clock tick event if not already done
CWidgetManager *pWM = CWidgetManager::getInstance();
if (!pWM->isClockMsgTarget(this))
{
pWM->registerClockMsgTarget(this);
_ClockMsgEventRegistered = true;
}
}
_ScrollDistance += dy;
}
//======================================================================== //========================================================================
void CGroupScrollText::setup() void CGroupScrollText::setup()
{ {