X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/01565945431705c314d4e3521f3567c1d2cafe9e..de5d3a20ce90c2e8b084350e987097cb63fd2172:/src/generic/scrlwing.cpp?ds=sidebyside diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp index 4da24ea311..a1014097e3 100644 --- a/src/generic/scrlwing.cpp +++ b/src/generic/scrlwing.cpp @@ -7,7 +7,7 @@ // Created: 01/02/97 // RCS-ID: $Id$ // Copyright: (c) wxWindows team -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -82,6 +82,8 @@ private: wxScrollHelper *m_scrollHelper; bool m_hasDrawnWindow; + + DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler) }; // ---------------------------------------------------------------------------- @@ -104,6 +106,8 @@ private: wxEventType m_eventType; int m_pos, m_orient; + + DECLARE_NO_COPY_CLASS(wxAutoScrollTimer) }; // ============================================================================ @@ -340,23 +344,18 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, m_xScrollPosition = xPos; m_yScrollPosition = yPos; + int w = noUnitsX * pixelsPerUnitX; + int h = noUnitsY * pixelsPerUnitY; + // For better backward compatibility we set persisting limits // here not just the size. It makes SetScrollbars 'sticky' // emulating the old non-autoscroll behaviour. - wxSize sz = m_targetWindow->GetClientSize(); -#if 1 - int x = wxMax(noUnitsX * pixelsPerUnitX, sz.x); - int y = wxMax(noUnitsY * pixelsPerUnitY, sz.y); -#else - int x = noUnitsX * pixelsPerUnitX; - int y = noUnitsY * pixelsPerUnitY; -#endif - m_targetWindow->SetVirtualSizeHints( x, y ); + m_targetWindow->SetVirtualSizeHints( w, h ); // The above should arguably be deprecated, this however we still need. - m_targetWindow->SetVirtualSize( x, y ); + m_targetWindow->SetVirtualSize( w, h ); if (do_refresh && !noRefresh) m_targetWindow->Refresh(TRUE, GetRect()); @@ -574,23 +573,28 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) } else { - if (m_yScrollPixelsPerLine > 0) + if ( m_yScrollPixelsPerLine > 0 ) { - int w, h; - GetTargetSize(&w, &h); - - int nMaxHeight = m_yScrollLines*m_yScrollPixelsPerLine; - int noPositions = (int) ( ((nMaxHeight - h)/(double)m_yScrollPixelsPerLine) + 0.5 ); - if (noPositions < 0) - noPositions = 0; - - if ( (m_yScrollPosition + nScrollInc) < 0 ) - nScrollInc = -m_yScrollPosition; // As -ve as we can go - else if ( (m_yScrollPosition + nScrollInc) > noPositions ) - nScrollInc = noPositions - m_yScrollPosition; // As +ve as we can go + if ( m_yScrollPosition + nScrollInc < 0 ) + { + // As -ve as we can go + nScrollInc = -m_yScrollPosition; + } + else // check for the other bound + { + const int posMax = m_yScrollLines - m_yScrollLinesPerPage; + if ( m_yScrollPosition + nScrollInc > posMax ) + { + // As +ve as we can go + nScrollInc = posMax - m_yScrollPosition; + } + } } else + { + // VZ: why do we do this? (FIXME) m_targetWindow->Refresh(TRUE, GetRect()); + } } return nScrollInc; @@ -609,7 +613,14 @@ void wxScrollHelper::AdjustScrollbars() int oldXScroll = m_xScrollPosition; int oldYScroll = m_yScrollPosition; - do { + // VZ: at least under Windows this loop is useless because when scrollbars + // [dis]appear we get a WM_SIZE resulting in another call to + // AdjustScrollbars() anyhow. As it doesn't seem to do any harm I leave + // it here for now but it would be better to ensure that all ports + // generate EVT_SIZE when scrollbars [dis]appear, emulating it if + // necessary, and remove it later + do + { GetTargetSize(&w, 0); if (m_xScrollPixelsPerLine == 0) @@ -641,35 +652,54 @@ void wxScrollHelper::AdjustScrollbars() GetTargetSize(0, &h); - if (m_yScrollPixelsPerLine == 0) + // scroll lines per page: if 0, no scrolling is needed + int linesPerPage; + + if ( m_yScrollPixelsPerLine == 0 ) { + // scrolling is disabled m_yScrollLines = 0; m_yScrollPosition = 0; - m_win->SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE); + linesPerPage = 0; } - else + else // might need scrolling { - m_yScrollLines = m_targetWindow->GetVirtualSize().GetHeight() / m_yScrollPixelsPerLine; + int hVirt = m_targetWindow->GetVirtualSize().GetHeight(); + m_yScrollLines = hVirt / m_yScrollPixelsPerLine; // Calculate page size i.e. number of scroll units you get on the // current client window - int noPagePositions = (int) ( (h/(double)m_yScrollPixelsPerLine) + 0.5 ); - if (noPagePositions < 1) noPagePositions = 1; - if ( noPagePositions > m_yScrollLines ) - noPagePositions = m_yScrollLines; + linesPerPage = h / m_yScrollPixelsPerLine; + if ( linesPerPage >= m_yScrollLines ) + { + // we're big enough to not need scrolling + linesPerPage = + m_yScrollLines = + m_yScrollPosition = 0; + } + else // we do need a scrollbar + { + if ( linesPerPage < 1 ) + linesPerPage = 1; + + // Correct position if greater than extent of canvas minus + // the visible portion of it or if below zero + const int posMax = m_yScrollLines - linesPerPage; + if ( m_yScrollPosition > posMax ) + m_yScrollPosition = posMax; + else if ( m_yScrollPosition < 0 ) + m_yScrollPosition = 0; + } + } - // Correct position if greater than extent of canvas minus - // the visible portion of it or if below zero - m_yScrollPosition = wxMin( m_yScrollLines - noPagePositions, m_yScrollPosition ); - m_yScrollPosition = wxMax( 0, m_yScrollPosition ); + m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, + linesPerPage, m_yScrollLines); - m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines); - // The amount by which we scroll when paging - SetScrollPageSize(wxVERTICAL, noPagePositions); - } + // The amount by which we scroll when paging + SetScrollPageSize(wxVERTICAL, linesPerPage); - // If a scrollbar (dis)appeared as a result of this, adjust them again. + // If a scrollbar (dis)appeared as a result of this, adjust them again. oldw = w; oldh = h; @@ -887,16 +917,19 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co // Default OnSize resets scrollbars, if any void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event)) { - if( m_win->GetAutoLayout() ) + if( m_win->GetAutoLayout() || m_targetWindow->GetAutoLayout() ) { if ( m_targetWindow != m_win ) m_targetWindow->FitInside(); m_win->FitInside(); -#if wxUSE_CONSTRAINTS - m_win->Layout(); -#endif + // FIXME: Something is really weird here... This should be + // called by FitInside above (and apparently is), yet the + // scrollsub sample will get the scrollbar wrong if resized + // quickly. This masks the bug, but is surely not the right + // answer at all. + AdjustScrollbars(); } else AdjustScrollbars(); @@ -952,7 +985,7 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event) yScrollOld = m_yScrollPosition; int dsty; - switch ( event.KeyCode() ) + switch ( event.GetKeyCode() ) { case WXK_PAGEUP: case WXK_PRIOR: