X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/03d1ae179905c0bdc720cd1c444a557f1e7a044b..1978421a6d8b81c1f8a961da4b8ddf544fec7b1b:/src/generic/scrlwing.cpp diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp index 8c40ecb853..8dab9a85f1 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 ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -18,7 +18,7 @@ // headers // ---------------------------------------------------------------------------- -#ifdef __GNUG__ +#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) #pragma implementation "genscrolwin.h" #endif @@ -40,8 +40,11 @@ #include "wx/scrolwin.h" #include "wx/panel.h" +#if wxUSE_TIMER #include "wx/timer.h" +#endif #include "wx/sizer.h" +#include "wx/recguard.h" #ifdef __WXMSW__ #include // for DLGC_WANTARROWS @@ -61,6 +64,11 @@ IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow) +/* + TODO PROPERTIES + style wxHSCROLL | wxVSCROLL +*/ + // ---------------------------------------------------------------------------- // wxScrollHelperEvtHandler: intercept the events from the window and forward // them to wxScrollHelper @@ -82,8 +90,11 @@ private: wxScrollHelper *m_scrollHelper; bool m_hasDrawnWindow; + + DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler) }; +#if wxUSE_TIMER // ---------------------------------------------------------------------------- // wxAutoScrollTimer: the timer used to generate a stream of scroll events when // a captured mouse is held outside the window @@ -104,6 +115,8 @@ private: wxEventType m_eventType; int m_pos, m_orient; + + DECLARE_NO_COPY_CLASS(wxAutoScrollTimer) }; // ============================================================================ @@ -166,6 +179,7 @@ void wxAutoScrollTimer::Notify() } } } +#endif // ---------------------------------------------------------------------------- // wxScrollHelperEvtHandler @@ -340,28 +354,40 @@ 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. - m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY ); + m_targetWindow->SetVirtualSizeHints( w, h ); // The above should arguably be deprecated, this however we still need. - m_targetWindow->SetVirtualSize( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY ); + 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__ } // ---------------------------------------------------------------------------- @@ -481,15 +507,15 @@ 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 } @@ -562,27 +588,32 @@ 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; @@ -591,8 +622,21 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) // Adjust the scrollbars - new version. void wxScrollHelper::AdjustScrollbars() { + static wxRecursionGuardFlag s_flagReentrancy; + wxRecursionGuard guard(s_flagReentrancy); + if ( guard.IsInside() ) + { + // don't reenter AdjustScrollbars() while another call to + // AdjustScrollbars() is in progress because this may lead to calling + // ScrollWindow() twice and this can really happen under MSW if + // SetScrollbar() call below adds or removes the scrollbar which + // changes the window size and hence results in another + // AdjustScrollbars() call + return; + } + #ifdef __WXMAC__ - m_targetWindow->MacUpdateImmediately(); + m_targetWindow->Update(); #endif int w = 0, h = 0; @@ -601,7 +645,14 @@ 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) @@ -633,40 +684,59 @@ 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; GetTargetSize( &w, &h ); - } while ( w != oldw && h != oldh ); + } while ( w != oldw || h != oldh ); #ifdef __WXMOTIF__ // Sorry, some Motif-specific code to implement a backing pixmap @@ -705,22 +775,22 @@ 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 } @@ -786,7 +856,7 @@ 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; @@ -810,7 +880,7 @@ 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)) @@ -831,12 +901,12 @@ 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 } @@ -879,16 +949,19 @@ 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(); @@ -944,7 +1017,7 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event) yScrollOld = m_yScrollPosition; int dsty; - switch ( event.KeyCode() ) + switch ( event.GetKeyCode() ) { case WXK_PAGEUP: case WXK_PRIOR: @@ -1017,11 +1090,13 @@ bool wxScrollHelper::SendAutoScrollEvents(wxScrollWinEvent& event) const void wxScrollHelper::StopAutoScrolling() { +#if wxUSE_TIMER if ( m_timerAutoScroll ) { delete m_timerAutoScroll; m_timerAutoScroll = (wxTimer *)NULL; } +#endif } void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event) @@ -1083,6 +1158,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) if ( !m_targetWindow->HasScrollbar(orient) ) return; +#if wxUSE_TIMER delete m_timerAutoScroll; m_timerAutoScroll = new wxAutoScrollTimer ( @@ -1093,6 +1169,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) orient ); m_timerAutoScroll->Start(50); // FIXME: make configurable +#endif } } @@ -1213,35 +1290,19 @@ wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg, { long rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam); +#ifndef __WXWINCE__ // we need to process arrows ourselves for scrolling if ( nMsg == WM_GETDLGCODE ) { rc |= DLGC_WANTARROWS; } +#endif return rc; } #endif // __WXMSW__ -#if WXWIN_COMPATIBILITY - -void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const -{ - *x_page = GetScrollPageSize(wxHORIZONTAL); - *y_page = GetScrollPageSize(wxVERTICAL); -} - -void wxGenericScrolledWindow::CalcUnscrolledPosition(int x, int y, float *xx, float *yy) const -{ - if ( xx ) - *xx = (float)(x + m_xScrollPosition * m_xScrollPixelsPerLine); - if ( yy ) - *yy = (float)(y + m_yScrollPosition * m_yScrollPixelsPerLine); -} - -#endif // WXWIN_COMPATIBILITY - #endif // !wxGTK // vi:sts=4:sw=4:et