/*********************************************************************
*
* _CalcScrollParas
*/
static int _CalcScrollParas(LISTBOX_Handle hObj) {
GUI_RECT Rect;
LISTBOX_Obj* pObj = LISTBOX_H2P(hObj);
/* Calc vertical scroll parameters */
pObj->ScrollStateV.NumItems = LISTBOX__GetNumItems(pObj);
pObj->ScrollStateV.PageSize = _GetNumVisItems(pObj, hObj);
/* Calc horizontal scroll parameters */
WM_GetInsideRectExScrollbar(hObj, &Rect);
pObj->ScrollStateH.NumItems = _GetContentsSizeX(hObj);
pObj->ScrollStateH.PageSize = Rect.x1 - Rect.x0 + 1;
return _UpdateScrollPos(hObj, pObj);
}
static int _OnMouseOver(LISTBOX_Handle hObj, LISTBOX_Obj* pObj, WM_MESSAGE* pMsg) {
const GUI_PID_STATE* pState = (const GUI_PID_STATE*)pMsg->Data.p;
if (pObj->hOwner) {
if (pState) { /* Something happened in our area (pressed or released) */
int Sel;
Sel = _GetItemFromPos(hObj, pObj, pState->x, pState->y);
if (Sel >= 0) {
if (Sel < (int)(pObj->ScrollStateV.v + _GetNumVisItems(pObj, hObj))) {
LISTBOX_SetSel(hObj, Sel);
}
}
}
}
return 0; /* Message handled */
}
/*********************************************************************
*
* _ManageAutoScroll
*/
static void _ManageAutoScroll(LISTBOX_Handle hObj) {
char IsRequired;
LISTBOX_Obj* pObj = LISTBOX_H2P(hObj);
if (pObj->Flags & LISTBOX_SF_AUTOSCROLLBAR_V) {
IsRequired = (_GetNumVisItems(pObj, hObj) < LISTBOX__GetNumItems(pObj));
WM_SetScrollbarV(hObj, IsRequired);
}
if (pObj->Flags & LISTBOX_SF_AUTOSCROLLBAR_H) {
GUI_RECT Rect;
int xSize, xSizeContents;
xSizeContents = _GetContentsSizeX(hObj);
WM_GetInsideRectExScrollbar(hObj, &Rect);
xSize = Rect.x1 - Rect.x0 + 1;
IsRequired = (xSizeContents > xSize);
WM_SetScrollbarH(hObj, IsRequired);
}
if (pObj->ScrollbarWidth) {
LISTBOX__SetScrollbarWidth(hObj, pObj);
}
}
static void _CalcScrollParas(WM_HWIN hWin) {
LISTBOX_Obj* pObj = LISTBOX_H2P(hWin);
pObj->ScrollState.NumItems = _GetNumItems(pObj);
pObj->ScrollState.PageSize = _GetNumVisItems(pObj);
}