Remove `Is` from the getter names for the same reason that removing `Get` from the name is preferred. The word `Is` was inconsistently used as a prefix in `CScrollRegion` but as an infix in `CListBox`.
Currently this must be added when calculating the required height of a UI rect for a scroll region to get a perfect fit.
It is extracted into a constant so it can be used in other parts to get list boxes with the perfect size.
Store the list box active state inside `CListBox` instead of tracking it separately with a pointer.
Allow activating list boxes by clicking the scrollbar. Previously it was only possible to activate list boxes by selecting an item.
Fix country selection list box in players settings not being deactivated properly when name/clan edit boxes are active, because wrong UI element IDs were being used.
Add `ScrollRelative` function to initiate relative scrolling programmatically, to realise scroll regions that scroll when the mouse is being dragged at the edge.
Add `DoEdgeScrolling` to encapsulate all the necessary edge scrolling logic based on the position of the mouse. The edge scrolling starts at a fixed distance from the edges. The scrolling speed is dependent on the distance of the mouse from this border.
Remember the maximum animation time when initiating a smooth scroll, so the smooth scrolling does not change erratically when `ui_smooth_scroll_time` is changed while smooth scrolling is in progress.
According to cppchecker's `constParameter` error:
```
src\engine\gfx\image_manipulation.cpp:7:58: style: Parameter 'pSrc' can be declared as pointer to const [constParameter]
static void Dilate(int w, int h, int BPP, unsigned char *pSrc, unsigned char *pDest, unsigned char AlphaThreshold = TW_DILATE_ALPHA_THRESHOLD)
^
src\engine\gfx\image_manipulation.cpp:58:67: style: Parameter 'pSrc' can be declared as pointer to const [constParameter]
static void CopyColorValues(int w, int h, int BPP, unsigned char *pSrc, unsigned char *pDest)
^
src\engine\shared\network_conn.cpp:241:42: style: Parameter 'Addr' can be declared as reference to const [constParameter]
void CNetConnection::DirectInit(NETADDR &Addr, SECURITY_TOKEN SecurityToken, SECURITY_TOKEN Token, bool Sixup)
^
src\base\system.cpp:4060:71: style: Parameter 'random' can be declared as pointer to const [constParameter]
void generate_password(char *buffer, unsigned length, unsigned short *random, unsigned random_length)
^
src\engine\client\backend\vulkan\backend_vulkan.cpp:263:38: style: Parameter 'AllocatedMemory' can be declared as reference to const [constParameter]
void Free(SMemoryHeapQueueElement &AllocatedMemory)
^
src\engine\client\backend\vulkan\backend_vulkan.cpp:1708:47: style: Parameter 'ImgExtent' can be declared as reference to const [constParameter]
static size_t ImageMipLevelCount(VkExtent3D &ImgExtent)
^
src\engine\client\backend\vulkan\backend_vulkan.cpp:2801:29: style: Parameter 'Image' can be declared as reference to const [constParameter]
void ImageBarrier(VkImage &Image, size_t MipMapBase, size_t MipMapCount, size_t LayerBase, size_t LayerCount, VkFormat Format, VkImageLayout OldLayout, VkImageLayout NewLayout)
^
src\engine\client\backend\vulkan\backend_vulkan.cpp:6495:46: style: Parameter 'ExecBuffer' can be declared as reference to const [constParameter]
void Cmd_Clear(SRenderCommandExecuteBuffer &ExecBuffer, const CCommandBuffer::SCommand_Clear *pCommand)
^
src\game\client\components\skins.cpp:83:72: style: Parameter 'pImg' can be declared as pointer to const [constParameter]
static void CheckMetrics(CSkin::SSkinMetricVariable &Metrics, uint8_t *pImg, int ImgWidth, int ImgX, int ImgY, int CheckWidth, int CheckHeight)
^
src\game\client\prediction\entities\character.h:106:37: style: Parameter 'pNewInput' can be declared as pointer to const [constParameter]
void SetInput(CNetObj_PlayerInput *pNewInput)
^
src\game\client\prediction\gameworld.cpp:245:106: style: Parameter 'pNotThis' can be declared as pointer to const [constParameter]
CCharacter *CGameWorld::IntersectCharacter(vec2 Pos0, vec2 Pos1, float Radius, vec2 &NewPos, CCharacter *pNotThis, int CollideWith, class CCharacter *pThisOnly)
^
src\game\client\prediction\gameworld.cpp:245:151: style: Parameter 'pThisOnly' can be declared as pointer to const [constParameter]
CCharacter *CGameWorld::IntersectCharacter(vec2 Pos0, vec2 Pos1, float Radius, vec2 &NewPos, CCharacter *pNotThis, int CollideWith, class CCharacter *pThisOnly)
^
src\game\client\prediction\gameworld.cpp:283:116: style: Parameter 'pNotThis' can be declared as pointer to const [constParameter]
std::list<class CCharacter *> CGameWorld::IntersectedCharacters(vec2 Pos0, vec2 Pos1, float Radius, class CEntity *pNotThis)
^
src\game\client\ui.cpp:522:180: style: Parameter 'pReadCursor' can be declared as pointer to const [constParameter]
void CUI::DoLabel(CUIElement::SUIElementRect &RectEl, const CUIRect *pRect, const char *pText, float Size, int Align, const SLabelProperties &LabelProps, int StrLen, CTextCursor *pReadCursor)
^
src\game\client\ui_scrollregion.cpp:23:86: style: Parameter 'pParams' can be declared as pointer to const [constParameter]
void CScrollRegion::Begin(CUIRect *pClipRect, vec2 *pOutOffset, CScrollRegionParams *pParams)
^
src\game\server\scoreworker.h:239:29: style: Parameter 'aTimeCp' can be declared as const array [constParameter]
void Set(float Time, float aTimeCp[NUM_CHECKPOINTS])
^
src\game\server\score.cpp:135:80: style: Parameter 'aTimeCp' can be declared as const array [constParameter]
void CScore::SaveScore(int ClientID, float Time, const char *pTimestamp, float aTimeCp[NUM_CHECKPOINTS], bool NotEligible)
^
src\game\server\teeinfo.cpp:40:57: style: Parameter 'pUseCustomColors' can be declared as pointer to const [constParameter]
CTeeInfo::CTeeInfo(const char *apSkinPartNames[6], int *pUseCustomColors, int *pSkinPartColors)
^
src\game\server\teeinfo.cpp:40:80: style: Parameter 'pSkinPartColors' can be declared as pointer to const [constParameter]
CTeeInfo::CTeeInfo(const char *apSkinPartNames[6], int *pUseCustomColors, int *pSkinPartColors)
^
```
