-// ----------------------------------------------------------------------------
-// scrollbars geometry
-// ----------------------------------------------------------------------------
-
-#if wxUSE_SCROLLBAR
-
-/* static */
-void wxStdRenderer::GetScrollBarThumbSize(wxCoord length,
- int thumbPos,
- int thumbSize,
- int range,
- wxCoord *thumbStart,
- wxCoord *thumbEnd)
-{
- // the thumb can't be made less than this number of pixels
- static const wxCoord thumbMinWidth = 8; // FIXME: should be configurable
-
- *thumbStart = (length*thumbPos) / range;
- *thumbEnd = (length*(thumbPos + thumbSize)) / range;
-
- if ( *thumbEnd - *thumbStart < thumbMinWidth )
- {
- // adjust the end if possible
- if ( *thumbStart <= length - thumbMinWidth )
- {
- // yes, just make it wider
- *thumbEnd = *thumbStart + thumbMinWidth;
- }
- else // it is at the bottom of the scrollbar
- {
- // so move it a bit up
- *thumbStart = length - thumbMinWidth;
- *thumbEnd = length;
- }
- }
-}
-
-wxRect wxStdRenderer::GetScrollbarRect(const wxScrollBar *scrollbar,
- wxScrollBar::Element elem,
- int thumbPos) const
-{
- if ( thumbPos == -1 )
- {
- thumbPos = scrollbar->GetThumbPosition();
- }
-
- const wxSize sizeArrow = GetScrollbarArrowSize();
-
- wxSize sizeTotal = scrollbar->GetClientSize();
- wxCoord *start, *width;
- wxCoord length, arrow;
- wxRect rect;
- if ( scrollbar->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 = scrollbar->GetRange();
- if ( !range )
- {
- thumbStart =
- thumbEnd = 0;
- }
- else
- {
- GetScrollBarThumbSize(length,
- thumbPos,
- scrollbar->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( _T("unknown scrollbar element") );
- }
-
- return rect;
-}
-
-wxCoord wxStdRenderer::GetScrollbarSize(const wxScrollBar *scrollbar)
-{
- const wxSize sizeArrowSB = GetScrollbarArrowSize();
-
- wxCoord sizeArrow, sizeTotal;
- if ( scrollbar->GetWindowStyle() & wxVERTICAL )
- {
- sizeArrow = sizeArrowSB.y;
- sizeTotal = scrollbar->GetSize().y;
- }
- else // horizontal
- {
- sizeArrow = sizeArrowSB.x;
- sizeTotal = scrollbar->GetSize().x;
- }
-
- return sizeTotal - 2*sizeArrow;
-}
-
-wxHitTest
-wxStdRenderer::HitTestScrollbar(const wxScrollBar *scrollbar, 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 = GetScrollbarArrowSize();
-
- wxCoord coord, sizeArrow, sizeTotal;
- wxSize size = scrollbar->GetSize();
- if ( scrollbar->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 = scrollbar->GetRange();
- if ( !range )
- {
- // clicking the scrollbar without range has no effect
- return wxHT_NOWHERE;
- }
- else
- {
- GetScrollBarThumbSize(sizeTotal,
- scrollbar->GetThumbPosition(),
- scrollbar->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;
- }
-}
-
-
-wxCoord
-wxStdRenderer::ScrollbarToPixel(const wxScrollBar *scrollbar, int thumbPos)
-{
- int range = scrollbar->GetRange();
- if ( !range )
- {
- // the only valid position anyhow
- return 0;
- }
-
- if ( thumbPos == -1 )
- {
- // by default use the current thumb position
- thumbPos = scrollbar->GetThumbPosition();
- }
-
- const wxSize sizeArrow = GetScrollbarArrowSize();
- return (thumbPos*GetScrollbarSize(scrollbar)) / range
- + (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x);
-}
-
-int wxStdRenderer::PixelToScrollbar(const wxScrollBar *scrollbar, wxCoord coord)
-{
- const wxSize sizeArrow = GetScrollbarArrowSize();
- return ((coord - (scrollbar->IsVertical() ? sizeArrow.y : sizeArrow.x)) *
- scrollbar->GetRange() ) / GetScrollbarSize(scrollbar);
-}
-
-#endif // wxUSE_SCROLLBAR
-
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