X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d0604192a55216dd4d7494541ab32cfe4afd1ad0..df6f82f04876bd1fc1d8f71cf7e0fa2a67ce682f:/src/generic/scrlwing.cpp diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp index efe09689d2..9ab5ebe316 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) }; // ============================================================================ @@ -340,36 +344,40 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, m_xScrollPosition = xPos; m_yScrollPosition = yPos; - wxSize sz = m_targetWindow->GetSize(); - int x = noUnitsX * pixelsPerUnitX; - int y = noUnitsY * pixelsPerUnitY; - if (x == 0) - x = sz.x; - if (y == 0) - y = sz.y; - + 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. - 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()); - - // TODO: check if we can use AdjustScrollbars always. -#ifdef __WXUNIVERSAL__ - AdjustScrollbars(); -#else - // This is also done by AdjustScrollbars, above + m_targetWindow->Refresh(TRUE, GetScrollRect()); + +#ifndef __WXUNIVERSAL__ + // If the target is not the same as the window with the scrollbars, + // then we need to update the scrollbars here, since they won't have + // been updated by SetVirtualSize(). + if ( m_targetWindow != m_win ) +#endif // !__WXUNIVERSAL__ + { + AdjustScrollbars(); + } +#ifndef __WXUNIVERSAL__ + else + { + // otherwise this has been done by AdjustScrollbars, above #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately() ; -#endif + m_targetWindow->Update() ; #endif + } +#endif // !__WXUNIVERSAL__ } // ---------------------------------------------------------------------------- @@ -489,15 +497,15 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) if ( needsRefresh ) { - m_targetWindow->Refresh(TRUE, GetRect()); + m_targetWindow->Refresh(TRUE, GetScrollRect()); } else { - m_targetWindow->ScrollWindow(dx, dy, GetRect()); + m_targetWindow->ScrollWindow(dx, dy, GetScrollRect()); } #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately() ; + m_targetWindow->Update() ; #endif } @@ -570,27 +578,32 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go } else - m_targetWindow->Refresh(TRUE, GetRect()); + m_targetWindow->Refresh(TRUE, GetScrollRect()); } 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 - m_targetWindow->Refresh(TRUE, GetRect()); + { + // VZ: why do we do this? (FIXME) + m_targetWindow->Refresh(TRUE, GetScrollRect()); + } } return nScrollInc; @@ -600,7 +613,7 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) void wxScrollHelper::AdjustScrollbars() { #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately(); + m_targetWindow->Update(); #endif int w = 0, h = 0; @@ -609,7 +622,14 @@ 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 +661,54 @@ 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; @@ -713,22 +752,22 @@ void wxScrollHelper::AdjustScrollbars() { if (m_xScrollingEnabled) m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0, - GetRect() ); + GetScrollRect() ); else - m_targetWindow->Refresh(TRUE, GetRect()); + m_targetWindow->Refresh(TRUE, GetScrollRect()); } if (oldYScroll != m_yScrollPosition) { if (m_yScrollingEnabled) m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), - GetRect() ); + GetScrollRect() ); else - m_targetWindow->Refresh(TRUE, GetRect()); + m_targetWindow->Refresh(TRUE, GetScrollRect()); } #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately(); + m_targetWindow->Update(); #endif } @@ -794,7 +833,7 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos ) ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately(); + m_targetWindow->Update(); #endif int w, h; @@ -818,7 +857,7 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos ) if (old_x != m_xScrollPosition) { m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition ); m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0, - GetRect() ); + GetScrollRect() ); } } if ((y_pos != -1) && (m_yScrollPixelsPerLine)) @@ -839,12 +878,12 @@ void wxScrollHelper::Scroll( int x_pos, int y_pos ) if (old_y != m_yScrollPosition) { m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition ); m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine, - GetRect() ); + GetScrollRect() ); } } #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately(); + m_targetWindow->Update(); #endif } @@ -887,16 +926,19 @@ 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 +994,7 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event) yScrollOld = m_yScrollPosition; int dsty; - switch ( event.KeyCode() ) + switch ( event.GetKeyCode() ) { case WXK_PAGEUP: case WXK_PRIOR: