void wxVScrolledWindow::RefreshLines(size_t from, size_t to)
{
wxASSERT_MSG( from <= to, _T("RefreshLines(): empty range") );
// clump the range to just the visible lines -- it is useless to refresh
// the other ones
if ( from < GetVisibleBegin() )
from = GetVisibleBegin();
if ( to >= GetVisibleEnd() )
to = GetVisibleEnd();
else
to++;
// calculate the rect occupied by these lines on screen
wxRect rect;
rect.width = GetClientSize().x;
for ( size_t nBefore = GetVisibleBegin(); nBefore < from; nBefore++ )
{
rect.y += OnGetLineHeight(nBefore);
}
for ( size_t nBetween = from; nBetween < to; nBetween++ )
{
rect.height += OnGetLineHeight(nBetween);
}
// do refresh it
RefreshRect(rect);
}
bool wxVScrolledWindow::ScrollToLine(size_t line)
{
if ( !m_lineMax )
{
// we're empty, code below doesn't make sense in this case
return false;
}
// determine the real first line to scroll to: we shouldn't scroll beyond
// the end
size_t lineFirstLast = FindFirstFromBottom(m_lineMax - 1, true);
if ( line > lineFirstLast )
line = lineFirstLast;
// anything to do?
if ( line == m_lineFirst )
{
// no
return false;
}
// remember the currently shown lines for the refresh code below
size_t lineFirstOld = GetVisibleBegin(),
lineLastOld = GetVisibleEnd();
m_lineFirst = line;
// the size of scrollbar thumb could have changed
UpdateScrollbar();
// finally refresh the display -- but only redraw as few lines as possible
// to avoid flicker
if ( GetChildren().empty() &&
(GetVisibleBegin() >= lineLastOld || GetVisibleEnd() <= lineFirstOld ) )
{
// the simplest case: we don't have any old lines left, just redraw
// everything
Refresh();
}
else // overlap between the lines we showed before and should show now
{
// Avoid scrolling visible parts of the screen on Mac
#ifdef __WXMAC__
if (!IsShownOnScreen())
Refresh();
else
#endif
ScrollWindow(0, GetLinesHeight(GetVisibleBegin(), lineFirstOld));
}
return true;
}
void wxVListBoxComboPopup::OnMouseMove(wxMouseEvent& event)
{
event.Skip();
// Move selection to cursor if it is inside the popup
int y = event.GetPosition().y;
int fromBottom = GetClientSize().y - y;
// Since in any case we need to find out if the last item is only
// partially visible, we might just as well replicate the HitTest
// loop here.
const size_t lineMax = GetVisibleEnd();
for ( size_t line = GetVisibleBegin(); line < lineMax; line++ )
{
y -= OnGetRowHeight(line);
if ( y < 0 )
{
// Only change selection if item is fully visible
if ( (y + fromBottom) >= 0 )
{
wxVListBox::SetSelection((int)line);
return;
}
}
}
}
bool wxVScrolledWindow::ScrollPages(int pages)
{
bool didSomething = false;
while ( pages )
{
int line;
if ( pages > 0 )
{
line = GetVisibleEnd();
if ( line )
line--;
pages--;
}
else // pages < 0
{
line = FindFirstFromBottom(GetVisibleBegin());
pages++;
}
didSomething = ScrollToLine(line);
}
return didSomething;
}
void wxVListBox::RefreshSelected()
{
// only refresh those items which are currently visible and selected:
for ( size_t n = GetVisibleBegin(), end = GetVisibleEnd(); n < end; n++ )
{
if ( IsSelected(n) )
RefreshRow(n);
}
}
void wxVListBox::OnPaint(wxPaintEvent& WXUNUSED(event))
{
wxSize clientSize = GetClientSize();
wxAutoBufferedPaintDC dc(this);
// the update rectangle
wxRect rectUpdate = GetUpdateClientRect();
// fill it with background colour
dc.SetBackground(GetBackgroundColour());
dc.Clear();
// the bounding rectangle of the current line
wxRect rectLine;
rectLine.width = clientSize.x;
// iterate over all visible lines
const size_t lineMax = GetVisibleEnd();
for ( size_t line = GetFirstVisibleLine(); line < lineMax; line++ )
{
const wxCoord hLine = OnGetLineHeight(line);
rectLine.height = hLine;
// and draw the ones which intersect the update rect
if ( rectLine.Intersects(rectUpdate) )
{
// don't allow drawing outside of the lines rectangle
wxDCClipper clip(dc, rectLine);
wxRect rect = rectLine;
OnDrawBackground(dc, rect, line);
OnDrawSeparator(dc, rect, line);
rect.Deflate(m_ptMargins.x, m_ptMargins.y);
OnDrawItem(dc, rect, line);
}
else // no intersection
{
if ( rectLine.GetTop() > rectUpdate.GetBottom() )
{
// we are already below the update rect, no need to continue
// further
break;
}
//else: the next line may intersect the update rect
}
rectLine.y += hLine;
}
}
void wxVScrolledWindow::OnScroll(wxScrollWinEvent& event)
{
size_t lineFirstNew;
const wxEventType evtType = event.GetEventType();
if ( evtType == wxEVT_SCROLLWIN_TOP )
{
lineFirstNew = 0;
}
else if ( evtType == wxEVT_SCROLLWIN_BOTTOM )
{
lineFirstNew = m_lineMax;
}
else if ( evtType == wxEVT_SCROLLWIN_LINEUP )
{
lineFirstNew = m_lineFirst ? m_lineFirst - 1 : 0;
}
else if ( evtType == wxEVT_SCROLLWIN_LINEDOWN )
{
lineFirstNew = m_lineFirst + 1;
}
else if ( evtType == wxEVT_SCROLLWIN_PAGEUP )
{
lineFirstNew = FindFirstFromBottom(m_lineFirst);
}
else if ( evtType == wxEVT_SCROLLWIN_PAGEDOWN )
{
lineFirstNew = GetVisibleEnd();
if ( lineFirstNew )
lineFirstNew--;
}
else if ( evtType == wxEVT_SCROLLWIN_THUMBRELEASE )
{
lineFirstNew = event.GetPosition();
}
else if ( evtType == wxEVT_SCROLLWIN_THUMBTRACK )
{
lineFirstNew = event.GetPosition();
}
else // unknown scroll event?
{
wxFAIL_MSG( _T("unknown scroll event type?") );
return;
}
ScrollToLine(lineFirstNew);
#ifdef __WXMAC__
Update();
#endif // __WXMAC__
}
int wxVScrolledWindow::HitTest(wxCoord WXUNUSED(x), wxCoord y) const
{
const size_t lineMax = GetVisibleEnd();
for ( size_t line = GetVisibleBegin(); line < lineMax; line++ )
{
y -= OnGetLineHeight(line);
if ( y < 0 )
return line;
}
return wxNOT_FOUND;
}
bool wxSymbolListCtrl::DoSetCurrent(int current)
{
wxASSERT_MSG( current == wxNOT_FOUND ||
(current >= m_minSymbolValue && current <= m_maxSymbolValue),
wxT("wxSymbolListCtrl::DoSetCurrent(): invalid symbol value") );
if ( current == m_current )
{
// nothing to do
return false;
}
if ( m_current != wxNOT_FOUND )
RefreshRow(SymbolValueToLineNumber(m_current));
m_current = current;
if ( m_current != wxNOT_FOUND )
{
int lineNo = SymbolValueToLineNumber(m_current);
// if the line is not visible at all, we scroll it into view but we
// don't need to refresh it -- it will be redrawn anyhow
if ( !IsVisible(lineNo) )
{
ScrollToRow(lineNo);
}
else // line is at least partly visible
{
// it is, indeed, only partly visible, so scroll it into view to
// make it entirely visible
while ( (unsigned)lineNo + 1 == GetVisibleEnd() &&
ScrollToRow(GetVisibleBegin() + 1) )
;
// but in any case refresh it as even if it was only partly visible
// before we need to redraw it entirely as its background changed
RefreshRow(lineNo);
}
}
return true;
}
wxRect wxVListBox::GetItemRect(size_t n) const
{
wxRect itemrect;
// check that this item is visible
const size_t lineMax = GetVisibleEnd();
if ( n >= lineMax )
return itemrect;
size_t line = GetVisibleBegin();
if ( n < line )
return itemrect;
while ( line <= n )
{
itemrect.y += itemrect.height;
itemrect.height = OnGetRowHeight(line);
line++;
}
itemrect.width = GetClientSize().x;
return itemrect;
}
void wxSymbolListCtrl::OnPaint(wxPaintEvent& WXUNUSED(event))
{
// If size is larger, recalculate double buffer bitmap
wxSize clientSize = GetClientSize();
if ( !m_doubleBuffer ||
clientSize.x > m_doubleBuffer->GetWidth() ||
clientSize.y > m_doubleBuffer->GetHeight() )
{
delete m_doubleBuffer;
m_doubleBuffer = new wxBitmap(clientSize.x+25,clientSize.y+25);
}
wxBufferedPaintDC dc(this,*m_doubleBuffer);
// the update rectangle
wxRect rectUpdate = GetUpdateClientRect();
// fill it with background colour
dc.SetBackground(GetBackgroundColour());
dc.Clear();
// set the font to be displayed
dc.SetFont(GetFont());
// the bounding rectangle of the current line
wxRect rectRow;
rectRow.width = clientSize.x;
dc.SetPen(wxPen(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT)));
dc.SetTextForeground(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
dc.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);
// iterate over all visible lines
const size_t lineMax = GetVisibleEnd();
for ( size_t line = GetVisibleBegin(); line < lineMax; line++ )
{
const wxCoord hRow = OnGetRowHeight(line);
rectRow.height = hRow;
// and draw the ones which intersect the update rect
if ( rectRow.Intersects(rectUpdate) )
{
// don't allow drawing outside of the lines rectangle
wxDCClipper clip(dc, rectRow);
wxRect rect = rectRow;
rect.Deflate(m_ptMargins.x, m_ptMargins.y);
OnDrawItem(dc, rect, line);
}
else // no intersection
{
if ( rectRow.GetTop() > rectUpdate.GetBottom() )
{
// we are already below the update rect, no need to continue
// further
break;
}
//else: the next line may intersect the update rect
}
rectRow.y += hRow;
}
}
