/*********************************************************************
*
* _CalcPositions
*
* Calculates all positions required for drawing or for mouse / touch
* evaluation.
*/
static void _CalcPositions(SCROLLBAR_Obj* pObj, SCROLLBAR_POSITIONS* pPos) {
int xSizeArrow, xSize, xSizeMoveable, ThumbSize, NumItems, xSizeThumbArea;
WM_HWIN hWin;
GUI_RECT r, rSub;
int x0, y0;
r = pObj->Widget.Win.Rect;
x0 = r.x0;
y0 = r.y0;
pPos->x1 = (pObj->Widget.State & WIDGET_STATE_VERTICAL) ? r.y1 : r.x1;
/* Subtract the rectangle of the other scrollbar (if existing and visible) */
if (pObj->Widget.Id == GUI_ID_HSCROLL) {
hWin = WM_GetScrollbarV(pObj->Widget.Win.hParent);
if (hWin) {
WM_GetWindowRectEx(hWin, &rSub);
if (r.x1 == rSub.x1) {
r.x1 = rSub.x0 -1;
}
}
}
if (pObj->Widget.Id == GUI_ID_VSCROLL) {
hWin = WM_GetScrollbarH(pObj->Widget.Win.hParent);
if (hWin) {
WM_GetWindowRectEx(hWin, &rSub);
if (r.y1 == rSub.y1) {
r.y1 = rSub.y0 -1;
}
}
}
/* Convert coordinates of this window */
GUI_MoveRect(&r, -x0, -y0);
/* Convert real into virtual coordinates */
_WIDGET__RECT2VRECT(&pObj->Widget, &r);
NumItems = pObj->NumItems;
xSize = r.x1 - r.x0 + 1;
xSizeArrow = _GetArrowSize(pObj);
xSizeThumbArea= xSize - 2 * xSizeArrow; /* Number of pixels available for thumb and movement */
ThumbSize = GUI__DivideRound(xSizeThumbArea * pObj->PageSize, NumItems);
if (ThumbSize < 4) {
ThumbSize = 4;
}
if (ThumbSize > xSizeThumbArea) {
ThumbSize = xSizeThumbArea;
}
xSizeMoveable = xSizeThumbArea - ThumbSize;
pPos->x0_LeftArrow = r.x0;
pPos->x1_LeftArrow = xSizeArrow - 1;
pPos->x1_RightArrow = xSize - 1;
pPos->x0_RightArrow = xSize - xSizeArrow;
pPos->x0_Thumb = pPos->x1_LeftArrow + 1+ GUI__DivideRound(xSizeMoveable * pObj->v, NumItems - pObj->PageSize);
pPos->x1_Thumb = pPos->x0_Thumb + ThumbSize - 1;
pPos->xSizeMoveable = xSizeMoveable;
pPos->ThumbSize = ThumbSize;
}
/*********************************************************************
*
* _OnTouch
*/
static void _OnTouch(SLIDER_Handle hObj, SLIDER_Obj* pObj, WM_MESSAGE*pMsg) {
GUI_TOUCH_tState* pState = (GUI_TOUCH_tState*)pMsg->Data.p;
if (pMsg->Data.p) { /* Something happened in our area (pressed or released) */
if (pState->Pressed) {
int Sel;
int Range = (pObj->Max - pObj->Min);
int x0, xsize;
int x;
x0 = 1 + pObj->Width/2; /* 1 pixel focus rectangle + width of actual slider */
x = (pObj->Widget.State & WIDGET_STATE_VERTICAL) ? pState->y : pState->x;
x -= x0;
xsize = WIDGET__GetWindowSizeX(hObj) - 2 * x0;
if (x <= 0) {
Sel = pObj->Min;
} else if (x >= xsize) {
Sel = pObj->Max;
} else {
Sel = GUI__DivideRound(Range* x, xsize);
Sel += pObj->Min;
}
WM_SetFocus(hObj);
WM_SetCapture(hObj, 1);
SLIDER_SetValue(hObj, Sel);
}
}
}
/*********************************************************************
*
* _OnTouch
*/
static void _OnTouch(SCROLLBAR_Handle hObj, SCROLLBAR_Obj* pObj, WM_MESSAGE*pMsg) {
SCROLLBAR_POSITIONS Pos;
GUI_PID_STATE* pState = (GUI_PID_STATE*)pMsg->Data.p;
if (pMsg->Data.p) { /* Something happened in our area (pressed or released) */
if (pState->Pressed) {
int Sel;
int Range;
int x;
Sel = pObj->v;
_CalcPositions(pObj, &Pos);
Range = pObj->NumItems - pObj->PageSize;
/* Swap mouse coordinates if necessary */
if (pObj->Widget.State & WIDGET_STATE_VERTICAL) {
int t = pState->x;
pState->x = pState->y;
pState->y = t;
}
x = pState->x;
if (x <= Pos.x1_LeftArrow) { /* left arrow (line left) */
Sel--;
} else if (x < Pos.x0_Thumb) { /* left area (page left) */
Sel -= pObj->PageSize;
} else if (x <= Pos.x1_Thumb) { /* Thumb area */
if (Pos.xSizeMoveable > 0) {
x = x - Pos.ThumbSize/2 - Pos.x1_LeftArrow-1;
Sel = GUI__DivideRound(Range * x, Pos.xSizeMoveable);
}
} else if (x < Pos.x0_RightArrow) { /* right area (page right) */
Sel += pObj->PageSize;
} else if (x <= Pos.x1_RightArrow) {
Sel++;
}
/* WM_SetFocus(hObj); */
WM_SetCapture(hObj, 1);
SCROLLBAR_SetValue(hObj, Sel);
if ((pObj->Widget.State & SCROLLBAR_STATE_PRESSED) == 0){
_ScrollbarPressed(hObj, pObj);
}
} else {
/* React only if button was pressed before ... avoid problems with moving / hiding windows above (such as dropdown) */
if (pObj->Widget.State & SCROLLBAR_STATE_PRESSED) {
_ScrollbarReleased(hObj, pObj);
}
}
}
}