void wxScrollBar::SetRange(int range)
{
SetScrollbar(GetThumbPosition(), GetThumbSize(), range, GetPageSize());
}
wxRect wxScrollBar::GetScrollbarRect(wxScrollBar::Element elem,
int thumbPos) const
{
if ( thumbPos == -1 )
{
thumbPos = GetThumbPosition();
}
const wxSize sizeArrow = m_renderer->GetScrollbarArrowSize();
wxSize sizeTotal = GetClientSize();
wxCoord *start, *width;
wxCoord length, arrow;
wxRect rect;
if ( IsVertical() )
{
rect.x = 0;
rect.width = sizeTotal.x;
length = sizeTotal.y;
start = &rect.y;
width = &rect.height;
arrow = sizeArrow.y;
}
else // horizontal
{
rect.y = 0;
rect.height = sizeTotal.y;
length = sizeTotal.x;
start = &rect.x;
width = &rect.width;
arrow = sizeArrow.x;
}
switch ( elem )
{
case wxScrollBar::Element_Arrow_Line_1:
*start = 0;
*width = arrow;
break;
case wxScrollBar::Element_Arrow_Line_2:
*start = length - arrow;
*width = arrow;
break;
case wxScrollBar::Element_Arrow_Page_1:
case wxScrollBar::Element_Arrow_Page_2:
// we don't have them at all
break;
case wxScrollBar::Element_Thumb:
case wxScrollBar::Element_Bar_1:
case wxScrollBar::Element_Bar_2:
// we need to calculate the thumb position - do it
{
length -= 2*arrow;
wxCoord thumbStart, thumbEnd;
int range = GetRange();
if ( !range )
{
thumbStart =
thumbEnd = 0;
}
else
{
GetScrollBarThumbSize(length,
thumbPos,
GetThumbSize(),
range,
&thumbStart,
&thumbEnd);
}
if ( elem == wxScrollBar::Element_Thumb )
{
*start = thumbStart;
*width = thumbEnd - thumbStart;
}
else if ( elem == wxScrollBar::Element_Bar_1 )
{
*start = 0;
*width = thumbStart;
}
else // elem == wxScrollBar::Element_Bar_2
{
*start = thumbEnd;
*width = length - thumbEnd;
}
// everything is relative to the start of the shaft so far
*start += arrow;
}
break;
case wxScrollBar::Element_Max:
default:
wxFAIL_MSG( wxT("unknown scrollbar element") );
}
return rect;
}
void wxScrollBar::SetPageSize( int pageLength )
{
SetScrollbar(GetThumbPosition(), GetThumbSize(), GetRange(), pageLength);
}
wxHitTest wxScrollBar::HitTestBar(const wxPoint& pt) const
{
// we only need to work with either x or y coord depending on the
// orientation, choose one (but still check the other one to verify if the
// mouse is in the window at all)
const wxSize sizeArrowSB = m_renderer->GetScrollbarArrowSize();
wxCoord coord, sizeArrow, sizeTotal;
wxSize size = GetSize();
if ( GetWindowStyle() & wxVERTICAL )
{
if ( pt.x < 0 || pt.x > size.x )
return wxHT_NOWHERE;
coord = pt.y;
sizeArrow = sizeArrowSB.y;
sizeTotal = size.y;
}
else // horizontal
{
if ( pt.y < 0 || pt.y > size.y )
return wxHT_NOWHERE;
coord = pt.x;
sizeArrow = sizeArrowSB.x;
sizeTotal = size.x;
}
// test for the arrows first as it's faster
if ( coord < 0 || coord > sizeTotal )
{
return wxHT_NOWHERE;
}
else if ( coord < sizeArrow )
{
return wxHT_SCROLLBAR_ARROW_LINE_1;
}
else if ( coord > sizeTotal - sizeArrow )
{
return wxHT_SCROLLBAR_ARROW_LINE_2;
}
else
{
// calculate the thumb position in pixels
sizeTotal -= 2*sizeArrow;
wxCoord thumbStart, thumbEnd;
int range = GetRange();
if ( !range )
{
// clicking the scrollbar without range has no effect
return wxHT_NOWHERE;
}
else
{
GetScrollBarThumbSize(sizeTotal,
GetThumbPosition(),
GetThumbSize(),
range,
&thumbStart,
&thumbEnd);
}
// now compare with the thumb position
coord -= sizeArrow;
if ( coord < thumbStart )
return wxHT_SCROLLBAR_BAR_1;
else if ( coord > thumbEnd )
return wxHT_SCROLLBAR_BAR_2;
else
return wxHT_SCROLLBAR_THUMB;
}
}
//+---------------------------------------------------------------------------
//
// Member: CScrollbarController::MouseMove
//
// Synopsis: Handle mouse move events.
//
// Arguments: pt new mouse location
//
// Notes:
//
//----------------------------------------------------------------------------
void CScrollbarController::MouseMove(const CPoint& pt)
{
_ptMouse = pt;
_pDispScroller->TransformPoint(&_ptMouse, COORDSYS_GLOBAL, COORDSYS_CONTAINER);
switch(_partPressedStart)
{
case SBP_NONE:
case SBP_TRACK:
AssertSz(FALSE, "unexpected call to CScrollbarController::MouseMoved");
break;
case SBP_THUMB:
{
LONG contentSize = _pDispScroller->GetContentSize()[_direction];
Assert(contentSize >= 0);
LONG trackSize =
GetTrackSize(_direction, _rcScrollbar, _buttonWidth) -
GetThumbSize(_direction, _rcScrollbar, contentSize,
_rcScrollbar.Size(_direction), _buttonWidth,
&_drawInfo);
if(trackSize <= 0)
{
break; // can't move thumb
}
// NOTE: we're not currently checking to see if the mouse point
// is out of range perpendicular to the scroll bar axis
BOOL fRightToLeft = (_direction==0 && _pDispScroller->IsRightToLeft());
LONG trackPos;
if(!fRightToLeft)
{
trackPos = _ptMouse[_direction] - _rcScrollbar[_direction] -
GetScaledButtonWidth(_direction, _rcScrollbar, _buttonWidth) - _mouseInThumb;
}
else
{
trackPos = _rcScrollbar.right -
GetScaledButtonWidth(_direction, _rcScrollbar, _buttonWidth) -
_mouseInThumb - _ptMouse.x;
}
LONG scrollOffset;
if(trackPos <= 0)
{
scrollOffset = 0;
}
else
{
contentSize -= _rcScrollbar.Size(_direction);
scrollOffset = MulDivQuick(trackPos, contentSize, trackSize);
if(fRightToLeft)
{
scrollOffset = -scrollOffset;
}
}
_pLayout->OnScroll(_direction, SB_THUMBPOSITION, scrollOffset);
}
break;
default:
{
// find out what the mouse would be pressing in its new location.
// If it's not the same as it used to be, invalidate the part.
SCROLLBARPART partPressedOld = _partPressed;
LONG contentSize, containerSize, scrollAmount;
GetScrollInfo(&contentSize, &containerSize, &scrollAmount);
_partPressed = GetPart(
_direction,
_rcScrollbar,
_ptMouse,
contentSize,
containerSize,
scrollAmount,
_buttonWidth,
&_drawInfo,
_pDispScroller->IsRightToLeft());
if(_partPressed != _partPressedStart)
{
_partPressed = SBP_NONE;
}
if(_partPressed != partPressedOld)
{
SCROLLBARPART invalidPart = _partPressed;
if(_partPressed != SBP_NONE)
{
// perform scroll action and set timer
OnTick(SB_REPEAT_TIMER);
}
else
{
invalidPart = partPressedOld;
}
Verify(_pLayout->OpenView());
InvalidatePart(
invalidPart,
_direction,
_rcScrollbar,
contentSize,
containerSize,
scrollAmount,
_buttonWidth,
_pDispScroller,
&_drawInfo);
}
}
break;
}
}
//+---------------------------------------------------------------------------
//
// Member: CScrollbarController::StartScrollbarController
//
// Synopsis: Start a scroll bar controller if necessary.
//
// Arguments: pLayout layout object to be called on scroll changes
// pDispScroller display scroller node
// pServerHost server host
// buttonWidth custom scroll bar button width
// pMessage message that caused creation of controller
//
// Notes:
//
//----------------------------------------------------------------------------
void CScrollbarController::StartScrollbarController(
CLayout* pLayout,
CDispScroller* pDispScroller,
CServer* pServerHost,
long buttonWidth,
CMessage* pMessage)
{
Assert(pLayout != NULL);
Assert(pDispScroller != NULL);
Assert(pServerHost != NULL);
Assert(pMessage != NULL);
BOOL fRightToLeft;
CScrollbarController* pSBC = TLS(pSBC);
Assert(pSBC != NULL);
// just to make sure previous controller is stopped
if(pSBC->_pLayout != NULL)
{
StopScrollbarController();
}
pSBC->_direction = (pMessage->htc==HTC_HSCROLLBAR ? 0 : 1);
pSBC->_pDispScroller = pDispScroller;
pSBC->_drawInfo.Init(pLayout->ElementOwner());
fRightToLeft = (pSBC->_direction==0 && pDispScroller->IsRightToLeft());
// calculate scroll bar rect
pDispScroller->GetClientRect(
&pSBC->_rcScrollbar,
(pSBC->_direction==0?CLIENTRECT_HSCROLLBAR:CLIENTRECT_VSCROLLBAR));
Assert(pSBC->_rcScrollbar.Contains(pMessage->ptContent));
LONG contentSize, containerSize, scrollAmount;
pSBC->GetScrollInfo(&contentSize, &containerSize, &scrollAmount);
// if the scrollbar is inactive, it doesn't matter what was pressed
if(contentSize <= containerSize)
{
return;
}
// what was pressed?
pSBC->_partPressed = GetPart(
pSBC->_direction,
pSBC->_rcScrollbar,
pMessage->ptContent,
contentSize,
containerSize,
scrollAmount,
buttonWidth,
pSBC->GetDrawInfo(),
pDispScroller->IsRightToLeft());
Assert(pSBC->_partPressed != SBP_NONE);
// if inactive track was pressed, no more work to do
if(pSBC->_partPressed == SBP_TRACK)
{
return;
}
// make scroll bar controller active
pSBC->_partPressedStart = pSBC->_partPressed;
pSBC->_pLayout = pLayout;
pSBC->_pDispScroller = pDispScroller;
pSBC->_pServerHost = pServerHost;
pSBC->_buttonWidth = buttonWidth;
pSBC->_ptMouse = pMessage->ptContent;
LONG lScrollTime = MAX_SCROLLTIME;
// if thumbing, compute hit point offset from top of thumb
if(pSBC->_partPressed == SBP_THUMB)
{
long trackSize = GetTrackSize(
pSBC->_direction, pSBC->_rcScrollbar, pSBC->_buttonWidth);
long thumbSize = GetThumbSize(
pSBC->_direction, pSBC->_rcScrollbar, contentSize, containerSize,
pSBC->_buttonWidth, pSBC->GetDrawInfo());
// _mouseInThumb is the xPos of the mouse in from the left edge of the thumb in LTR cases
// and xPos of the mouse in from the right edge of the thumb in RTL HSCROLL cases
if(!fRightToLeft)
{
pSBC->_mouseInThumb =
pSBC->_ptMouse[pSBC->_direction] -
pSBC->_rcScrollbar[pSBC->_direction] -
GetScaledButtonWidth(pSBC->_direction, pSBC->_rcScrollbar, pSBC->_buttonWidth) -
GetThumbOffset(contentSize, containerSize, scrollAmount, trackSize, thumbSize);
}
else
{
pSBC->_mouseInThumb =
pSBC->_rcScrollbar.right -
GetScaledButtonWidth(pSBC->_direction, pSBC->_rcScrollbar, pSBC->_buttonWidth) +
GetThumbOffset(contentSize, containerSize, scrollAmount, trackSize, thumbSize) -
pSBC->_ptMouse.x;
}
Assert(pSBC->_mouseInThumb >= 0);
// no smooth scrolling
lScrollTime = 0;
}
// capture the mouse
HWND hwnd = pServerHost->_pInPlace->_hwnd;
if(FAILED(GWSetCapture(
pSBC,
ONMESSAGE_METHOD(CScrollbarController, OnMessage, onmessage),
hwnd)))
{
pSBC->_pLayout = NULL;
return;
}
// set timer for repeating actions
if(pSBC->_partPressed != SBP_THUMB)
{
// perform first action
pLayout->OnScroll(
pSBC->_direction, TranslateSBAction(pSBC->_partPressed), 0, FALSE, lScrollTime);
CSize scrollOffset;
pSBC->_pDispScroller->GetScrollOffset(&scrollOffset);
scrollAmount = scrollOffset[pSBC->_direction];
// set timer for subsequent action
FormsSetTimer(
pSBC,
ONTICK_METHOD(CScrollbarController, OnTick, ontick),
SB_REPEAT_TIMER,
GetRepeatDelay());
}
// invalidate the part we hit, if necessary
pLayout->OpenView();
InvalidatePart(
pSBC->_partPressed,
pSBC->_direction,
pSBC->_rcScrollbar,
contentSize,
containerSize,
scrollAmount,
buttonWidth,
pDispScroller,
pSBC->GetDrawInfo());
}
gg_tl_dat BigScrollBar::GetBigThumbSize()
{
gg_tl_dat result = (((gg_tl_dat)GetThumbSize())*m_BigRange)/SCROLLBAR_LENGTH;
return result;
}
//+---------------------------------------------------------------------------
//
// Member: CScrollbar::GetPartRect
//
// Synopsis: Return the rect bounding the given scroll bar part.
//
// Arguments: prcPart returns part rect
// part which scroll bar part
// direction 0 for horizontal scroll bar, 1 for vertical
// rcScrollbar scroll bar bounds
// contentSize size of content controlled by scroll bar
// containerSize size of container
// scrollAmount current scroll amount
// buttonWidth width of scroll bar buttons
// fRightToLeft The text flow is RTL...0,0 is at top right
//
// Notes:
//
//----------------------------------------------------------------------------
void CScrollbar::GetPartRect(
CRect* prcPart,
SCROLLBARPART part,
int direction,
const CRect& rcScrollbar,
long contentSize,
long containerSize,
long scrollAmount,
long buttonWidth,
CDrawInfo* pDI,
BOOL fRightToLeft)
{
// adjust button width if there isn't room for both buttons at full size
long scaledButtonWidth = GetScaledButtonWidth(direction, rcScrollbar, buttonWidth);
switch(part)
{
case SBP_NONE:
AssertSz(FALSE, "CScrollbar::GetPartRect called with no part");
prcPart->SetRectEmpty();
break;
case SBP_PREVBUTTON:
*prcPart = rcScrollbar;
(*prcPart)[direction+2] = rcScrollbar[direction] + scaledButtonWidth;
break;
case SBP_NEXTBUTTON:
*prcPart = rcScrollbar;
(*prcPart)[direction] = rcScrollbar[direction+2] - scaledButtonWidth;
break;
case SBP_TRACK:
case SBP_PREVTRACK:
case SBP_NEXTTRACK:
case SBP_THUMB:
{
if(contentSize<=containerSize && part!=SBP_TRACK)
{
prcPart->SetRectEmpty();
break;
}
*prcPart = rcScrollbar;
(*prcPart)[direction] += scaledButtonWidth;
(*prcPart)[direction+2] -= scaledButtonWidth;
if(part == SBP_TRACK)
{
break;
}
// calculate thumb size
long trackSize = prcPart->Size(direction);
long thumbSize = GetThumbSize(
direction, rcScrollbar, contentSize, containerSize, buttonWidth, pDI);
long thumbOffset = GetThumbOffset(
contentSize, containerSize, scrollAmount, trackSize, thumbSize);
if(part == SBP_THUMB)
{
// We need to special case RTL HSCROLL
if(direction==0 && fRightToLeft)
{
prcPart->right += thumbOffset;
prcPart->left = prcPart->right - thumbSize;
}
else
{
(*prcPart)[direction] += thumbOffset;
(*prcPart)[direction+2] = (*prcPart)[direction] + thumbSize;
}
}
else if(part == SBP_PREVTRACK)
{
if(direction==0 && fRightToLeft)
{
prcPart->right += thumbOffset - thumbSize;
}
else
{
(*prcPart)[direction+2] = (*prcPart)[direction] + thumbOffset;
}
}
else
{
if(direction==0 && fRightToLeft)
{
prcPart->left = prcPart->right + thumbOffset;
}
else
{
(*prcPart)[direction] += thumbOffset + thumbSize;
}
}
}
break;
}
}
