wxCoord wxScrollBar::ScrollbarToPixel(int thumbPos)
{
int range = GetRange();
if ( !range )
{
// the only valid position anyhow
return 0;
}
if ( thumbPos == -1 )
{
// by default use the current thumb position
thumbPos = GetThumbPosition();
}
const wxSize sizeArrow = m_renderer->GetScrollbarArrowSize();
return (thumbPos * GetScrollbarSize()) / range
+ (IsVertical() ? sizeArrow.y : sizeArrow.x);
}
int wxScrollBar::PixelToScrollbar(wxCoord coord)
{
const wxSize sizeArrow = m_renderer->GetScrollbarArrowSize();
return ((coord - (IsVertical() ? sizeArrow.y : sizeArrow.x)) *
GetRange() ) / GetScrollbarSize();
}
// Formats the enabled scrollbars based on the current size of the host element.
void ElementScroll::FormatScrollbars()
{
Vector2f containing_block = element->GetBox().GetSize(Box::PADDING);
for (int i = 0; i < 2; i++)
{
if (!scrollbars[i].enabled)
continue;
if (i == VERTICAL)
{
scrollbars[i].widget->SetBarLength(element->GetClientHeight());
scrollbars[i].widget->SetTrackLength(element->GetScrollHeight());
float traversable_track = element->GetScrollHeight() - element->GetClientHeight();
if (traversable_track > 0)
scrollbars[i].widget->SetBarPosition(element->GetScrollTop() / traversable_track);
else
scrollbars[i].widget->SetBarPosition(0);
}
else
{
scrollbars[i].widget->SetBarLength(element->GetClientWidth());
scrollbars[i].widget->SetTrackLength(element->GetScrollWidth());
float traversable_track = element->GetScrollWidth() - element->GetClientWidth();
if (traversable_track > 0)
scrollbars[i].widget->SetBarPosition(element->GetScrollLeft() / traversable_track);
else
scrollbars[i].widget->SetBarPosition(0);
}
float slider_length = containing_block[1 - i];
float user_scrollbar_margin = scrollbars[i].element->ResolveProperty(SCROLLBAR_MARGIN, slider_length);
float min_scrollbar_margin = GetScrollbarSize(i == VERTICAL ? HORIZONTAL : VERTICAL);
slider_length -= Math::Max(user_scrollbar_margin, min_scrollbar_margin);
scrollbars[i].widget->FormatElements(containing_block, slider_length);
scrollbars[i].widget->SetLineHeight((float) ElementUtilities::GetLineHeight(element));
int variable_axis = i == VERTICAL ? 0 : 1;
Vector2f offset = element->GetBox().GetPosition(Box::PADDING);
offset[variable_axis] += containing_block[variable_axis] - (scrollbars[i].element->GetBox().GetSize(Box::BORDER)[variable_axis] + scrollbars[i].element->GetBox().GetEdge(Box::MARGIN, i == VERTICAL ? Box::RIGHT : Box::BOTTOM));
// Add the top or left margin (as appropriate) onto the scrollbar's position.
offset[1 - variable_axis] += scrollbars[i].element->GetBox().GetEdge(Box::MARGIN, i == VERTICAL ? Box::TOP : Box::LEFT);
scrollbars[i].element->SetOffset(offset, element, true);
}
// Format the corner, if it is necessary.
if (scrollbars[0].enabled &&
scrollbars[1].enabled)
{
CreateCorner();
Box corner_box;
corner_box.SetContent(Vector2f(scrollbars[VERTICAL].size, scrollbars[HORIZONTAL].size));
corner->SetBox(corner_box);
corner->SetOffset(containing_block - Vector2f(scrollbars[VERTICAL].size, scrollbars[HORIZONTAL].size), element, true);
corner->SetProperty(VISIBILITY, "visible");
}
else
{
if (corner != NULL)
corner->SetProperty(VISIBILITY, "hidden");
}
}
