X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/69e97525290ac3aec35dd3f2f304763e40a95ee1..3d777efedc1e05bd6c2a7c34a00a65895b62bb13:/src/generic/scrlwing.cpp diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp index d0a8cea4bc..ed7d288d7e 100644 --- a/src/generic/scrlwing.cpp +++ b/src/generic/scrlwing.cpp @@ -5,7 +5,6 @@ // Modified by: Vadim Zeitlin on 31.08.00: wxScrollHelper allows to implement. // Ron Lee on 10.4.02: virtual size / auto scrollbars et al. // Created: 01/02/97 -// RCS-ID: $Id$ // Copyright: (c) wxWidgets team // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// @@ -72,21 +71,17 @@ class WXDLLEXPORT wxScrollHelperEvtHandler : public wxEvtHandler { public: - wxScrollHelperEvtHandler(wxScrollHelper *scrollHelper) + wxScrollHelperEvtHandler(wxScrollHelperBase *scrollHelper) { m_scrollHelper = scrollHelper; } virtual bool ProcessEvent(wxEvent& event); - void ResetDrawnFlag() { m_hasDrawnWindow = false; } - private: - wxScrollHelper *m_scrollHelper; - - bool m_hasDrawnWindow; + wxScrollHelperBase *m_scrollHelper; - DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler) + wxDECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler); }; #if wxUSE_TIMER @@ -98,7 +93,8 @@ private: class wxAutoScrollTimer : public wxTimer { public: - wxAutoScrollTimer(wxWindow *winToScroll, wxScrollHelper *scroll, + wxAutoScrollTimer(wxWindow *winToScroll, + wxScrollHelperBase *scroll, wxEventType eventTypeToSend, int pos, int orient); @@ -106,12 +102,12 @@ public: private: wxWindow *m_win; - wxScrollHelper *m_scrollHelper; + wxScrollHelperBase *m_scrollHelper; wxEventType m_eventType; int m_pos, m_orient; - DECLARE_NO_COPY_CLASS(wxAutoScrollTimer) + wxDECLARE_NO_COPY_CLASS(wxAutoScrollTimer); }; // ============================================================================ @@ -123,7 +119,7 @@ private: // ---------------------------------------------------------------------------- wxAutoScrollTimer::wxAutoScrollTimer(wxWindow *winToScroll, - wxScrollHelper *scroll, + wxScrollHelperBase *scroll, wxEventType eventTypeToSend, int pos, int orient) { @@ -146,12 +142,13 @@ void wxAutoScrollTimer::Notify() // first scroll the window if we are allowed to do it wxScrollWinEvent event1(m_eventType, m_pos, m_orient); event1.SetEventObject(m_win); + event1.SetId(m_win->GetId()); if ( m_scrollHelper->SendAutoScrollEvents(event1) && m_win->GetEventHandler()->ProcessEvent(event1) ) { // and then send a pseudo mouse-move event to refresh the selection wxMouseEvent event2(wxEVT_MOTION); - wxGetMousePosition(&event2.m_x, &event2.m_y); + event2.SetPosition(wxGetMousePosition()); // the mouse event coordinates should be client, not screen as // returned by wxGetMousePosition @@ -164,7 +161,16 @@ void wxAutoScrollTimer::Notify() event2.SetEventObject(m_win); - // FIXME: we don't fill in the other members - ok? + wxMouseState mouseState = wxGetMouseState(); + + event2.m_leftDown = mouseState.LeftIsDown(); + event2.m_middleDown = mouseState.MiddleIsDown(); + event2.m_rightDown = mouseState.RightIsDown(); + + event2.m_shiftDown = mouseState.ShiftDown(); + event2.m_controlDown = mouseState.ControlDown(); + event2.m_altDown = mouseState.AltDown(); + event2.m_metaDown = mouseState.MetaDown(); m_win->GetEventHandler()->ProcessEvent(event2); } @@ -184,26 +190,13 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event) { wxEventType evType = event.GetEventType(); - // the explanation of wxEVT_PAINT processing hack: for historic reasons - // there are 2 ways to process this event in classes deriving from - // wxScrolledWindow. The user code may - // - // 1. override wxScrolledWindow::OnDraw(dc) - // 2. define its own OnPaint() handler - // - // In addition, in wxUniversal wxWindow defines OnPaint() itself and - // always processes the draw event, so we can't just try the window - // OnPaint() first and call our HandleOnPaint() if it doesn't process it - // (the latter would never be called in wxUniversal). - // - // So the solution is to have a flag telling us whether the user code drew - // anything in the window. We set it to true here but reset it to false in - // wxScrolledWindow::OnPaint() handler (which wouldn't be called if the - // user code defined OnPaint() in the derived class) - m_hasDrawnWindow = true; - - // pass it on to the real handler - bool processed = wxEvtHandler::ProcessEvent(event); + // Pass it on to the real handler: notice that we must not call + // ProcessEvent() on this object itself as it wouldn't pass it to the next + // handler (i.e. the real window) if we're called from a previous handler + // (as indicated by "process here only" flag being set) and we do want to + // execute the handler defined in the window we're associated with right + // now, without waiting until TryAfter() is called from wxEvtHandler. + bool processed = m_nextHandler->ProcessEvent(event); // always process the size events ourselves, even if the user code handles // them as well, as we need to AdjustScrollbars() @@ -215,22 +208,25 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event) if ( evType == wxEVT_SIZE ) { m_scrollHelper->HandleOnSize((wxSizeEvent &)event); - return true; } - if ( processed ) - { - // normally, nothing more to do here - except if it was a paint event - // which wasn't really processed, then we'll try to call our - // OnDraw() below (from HandleOnPaint) - if ( m_hasDrawnWindow || event.IsCommandEvent() ) - { - return true; - } - } + if ( processed && event.IsCommandEvent()) + return true; - if ( evType == wxEVT_PAINT ) + // For wxEVT_PAINT the user code can either handle this event as usual or + // override virtual OnDraw(), so if the event hasn't been handled we need + // to call this virtual function ourselves. + if ( +#ifndef __WXUNIVERSAL__ + // in wxUniversal "processed" will always be true, because + // all windows use the paint event to draw themselves. + // In this case we can't use this flag to determine if a custom + // paint event handler already drew our window and we just + // call OnDraw() anyway. + !processed && +#endif // !__WXUNIVERSAL__ + evType == wxEVT_PAINT ) { m_scrollHelper->HandleOnPaint((wxPaintEvent &)event); return true; @@ -297,19 +293,33 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event) } } - if ( processed ) - event.Skip(wasSkipped); + event.Skip(wasSkipped); + + // We called ProcessEvent() on the next handler, meaning that we explicitly + // worked around the request to process the event in this handler only. As + // explained above, this is unfortunately really necessary but the trouble + // is that the event will continue to be post-processed by the previous + // handler resulting in duplicate calls to event handlers. Call the special + // function below to prevent this from happening, base class DoTryChain() + // will check for it and behave accordingly. + // + // And if we're not called from DoTryChain(), this won't do anything anyhow. + event.DidntHonourProcessOnlyIn(); return processed; } +// ============================================================================ +// wxScrollHelperBase implementation +// ============================================================================ + // ---------------------------------------------------------------------------- -// wxScrollHelper construction +// wxScrollHelperBase construction // ---------------------------------------------------------------------------- -wxScrollHelper::wxScrollHelper(wxWindow *win) +wxScrollHelperBase::wxScrollHelperBase(wxWindow *win) { - wxASSERT_MSG( win, _T("associated window can't be NULL in wxScrollHelper") ); + wxASSERT_MSG( win, wxT("associated window can't be NULL in wxScrollHelper") ); m_xScrollPixelsPerLine = m_yScrollPixelsPerLine = @@ -323,8 +333,7 @@ wxScrollHelper::wxScrollHelper(wxWindow *win) m_xScrollingEnabled = m_yScrollingEnabled = true; - m_xVisibility = - m_yVisibility = wxSHOW_SB_DEFAULT; + m_kbdScrollingEnabled = true; m_scaleX = m_scaleY = 1.0; @@ -333,21 +342,21 @@ wxScrollHelper::wxScrollHelper(wxWindow *win) #endif m_win = - m_targetWindow = (wxWindow *)NULL; + m_targetWindow = NULL; - m_timerAutoScroll = (wxTimer *)NULL; + m_timerAutoScroll = NULL; m_handler = NULL; m_win = win; - - m_win->SetScrollHelper( this ); + + m_win->SetScrollHelper(static_cast(this)); // by default, the associated window is also the target window DoSetTargetWindow(win); } -wxScrollHelper::~wxScrollHelper() +wxScrollHelperBase::~wxScrollHelperBase() { StopAutoScrolling(); @@ -358,24 +367,25 @@ wxScrollHelper::~wxScrollHelper() // setting scrolling parameters // ---------------------------------------------------------------------------- -void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, - int pixelsPerUnitY, - int noUnitsX, - int noUnitsY, - int xPos, - int yPos, - bool noRefresh) +void wxScrollHelperBase::SetScrollbars(int pixelsPerUnitX, + int pixelsPerUnitY, + int noUnitsX, + int noUnitsY, + int xPos, + int yPos, + bool noRefresh) { - int xpos, ypos; + // Convert positions expressed in scroll units to positions in pixels. + int xPosInPixels = (xPos + m_xScrollPosition)*m_xScrollPixelsPerLine, + yPosInPixels = (yPos + m_yScrollPosition)*m_yScrollPixelsPerLine; - CalcUnscrolledPosition(xPos, yPos, &xpos, &ypos); bool do_refresh = ( (noUnitsX != 0 && m_xScrollLines == 0) || - (noUnitsX < m_xScrollLines && xpos > pixelsPerUnitX * noUnitsX) || + (noUnitsX < m_xScrollLines && xPosInPixels > pixelsPerUnitX * noUnitsX) || (noUnitsY != 0 && m_yScrollLines == 0) || - (noUnitsY < m_yScrollLines && ypos > pixelsPerUnitY * noUnitsY) || + (noUnitsY < m_yScrollLines && yPosInPixels > pixelsPerUnitY * noUnitsY) || (xPos != m_xScrollPosition) || (yPos != m_yScrollPosition) ); @@ -425,7 +435,7 @@ void wxScrollHelper::SetScrollbars(int pixelsPerUnitX, // [target] window handling // ---------------------------------------------------------------------------- -void wxScrollHelper::DeleteEvtHandler() +void wxScrollHelperBase::DeleteEvtHandler() { // search for m_handler in the handler list if ( m_win && m_handler ) @@ -441,13 +451,7 @@ void wxScrollHelper::DeleteEvtHandler() } } -void wxScrollHelper::ResetDrawnFlag() -{ - wxCHECK_RET( m_handler, "invalid use of ResetDrawnFlag - no handler?" ); - m_handler->ResetDrawnFlag(); -} - -void wxScrollHelper::DoSetTargetWindow(wxWindow *target) +void wxScrollHelperBase::DoSetTargetWindow(wxWindow *target) { m_targetWindow = target; #ifdef __WXMAC__ @@ -467,7 +471,7 @@ void wxScrollHelper::DoSetTargetWindow(wxWindow *target) } } -void wxScrollHelper::SetTargetWindow(wxWindow *target) +void wxScrollHelperBase::SetTargetWindow(wxWindow *target) { wxCHECK_RET( target, wxT("target window must not be NULL") ); @@ -477,7 +481,7 @@ void wxScrollHelper::SetTargetWindow(wxWindow *target) DoSetTargetWindow(target); } -wxWindow *wxScrollHelper::GetTargetWindow() const +wxWindow *wxScrollHelperBase::GetTargetWindow() const { return m_targetWindow; } @@ -486,7 +490,7 @@ wxWindow *wxScrollHelper::GetTargetWindow() const // scrolling implementation itself // ---------------------------------------------------------------------------- -void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) +void wxScrollHelperBase::HandleOnScroll(wxScrollWinEvent& event) { int nScrollInc = CalcScrollInc(event); if ( nScrollInc == 0 ) @@ -558,7 +562,7 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) } } -int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) +int wxScrollHelperBase::CalcScrollInc(wxScrollWinEvent& event) { int pos = event.GetPosition(); int orient = event.GetOrientation(); @@ -647,196 +651,7 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) return nScrollInc; } -void -wxScrollHelper::AdjustScrollbar(int orient, - int clientSize, - int virtSize, - int& pixelsPerUnit, - int& scrollUnits, - int& scrollPosition, - wxScrollbarVisibility visibility) -{ - if ( visibility == wxSHOW_SB_NEVER ) - { - m_win->SetScrollbar(orient, 0, 0, 0); - return; - } - - // scroll lines per page: if 0, no scrolling is needed - int unitsPerPage; - - // check if we need scrollbar in this direction at all - if ( pixelsPerUnit == 0 || - (clientSize >= virtSize && visibility != wxSHOW_SB_ALWAYS) ) - { - // scrolling is disabled or unnecessary - scrollUnits = - scrollPosition = 0; - unitsPerPage = 0; - } - else // might need scrolling - { - // Round up integer division to catch any "leftover" client space. - scrollUnits = (virtSize + pixelsPerUnit - 1) / pixelsPerUnit; - - // Calculate the number of fully scroll units - unitsPerPage = clientSize / pixelsPerUnit; - - if (unitsPerPage >= scrollUnits) - { - // we're big enough to not need scrolling - scrollUnits = - scrollPosition = 0; - unitsPerPage = 0; - } - else // we do need a scrollbar - { - if ( unitsPerPage < 1 ) - unitsPerPage = 1; - - // Correct position if greater than extent of canvas minus - // the visible portion of it or if below zero - const int posMax = scrollUnits - unitsPerPage; - if ( scrollPosition > posMax ) - scrollPosition = posMax; - else if ( scrollPosition < 0 ) - scrollPosition = 0; - } - } - - m_win->SetScrollbar(orient, scrollPosition, unitsPerPage, scrollUnits); - - // The amount by which we scroll when paging - SetScrollPageSize(orient, unitsPerPage); -} - -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; - } - - int oldXScroll = m_xScrollPosition; - int oldYScroll = m_yScrollPosition; - - // we may need to readjust the scrollbars several times as enabling one of - // them reduces the area available for the window contents and so can make - // the other scrollbar necessary now although it wasn't necessary before - // - // VZ: normally this loop should be over in at most 2 iterations, I don't - // know why do we need 5 of them - for ( int iterationCount = 0; iterationCount < 5; iterationCount++ ) - { - wxSize clientSize = GetTargetSize(); - const wxSize virtSize = m_targetWindow->GetVirtualSize(); - - // this block of code tries to work around the following problem: the - // window could have been just resized to have enough space to show its - // full contents without the scrollbars, but its client size could be - // not big enough because it does have the scrollbars right now and so - // the scrollbars would remain even though we don't need them any more - // - // to prevent this from happening, check if we have enough space for - // everything without the scrollbars and explicitly disable them then - const wxSize availSize = GetSizeAvailableForScrollTarget( - m_win->GetSize() - m_win->GetWindowBorderSize()); - if ( availSize != clientSize ) - { - if ( availSize.x >= virtSize.x && availSize.y >= virtSize.y ) - { - // this will be enough to make the scrollbars disappear below - // and then the client size will indeed become equal to the - // full available size - clientSize = availSize; - } - } - - - AdjustScrollbar(wxHORIZONTAL, - clientSize.x, - virtSize.x, - m_xScrollPixelsPerLine, - m_xScrollLines, - m_xScrollPosition, - m_xVisibility); - - AdjustScrollbar(wxVERTICAL, - clientSize.y, - virtSize.y, - m_yScrollPixelsPerLine, - m_yScrollLines, - m_yScrollPosition, - m_yVisibility); - - - // If a scrollbar (dis)appeared as a result of this, we need to adjust - // them again but if the client size didn't change, then we're done - if ( GetTargetSize() == clientSize ) - break; - } - -#ifdef __WXMOTIF__ - // Sorry, some Motif-specific code to implement a backing pixmap - // for the wxRETAINED style. Implementing a backing store can't - // be entirely generic because it relies on the wxWindowDC implementation - // to duplicate X drawing calls for the backing pixmap. - - if ( m_targetWindow->GetWindowStyle() & wxRETAINED ) - { - Display* dpy = XtDisplay((Widget)m_targetWindow->GetMainWidget()); - - int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; - int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; - if (m_targetWindow->GetBackingPixmap() && - !((m_targetWindow->GetPixmapWidth() == totalPixelWidth) && - (m_targetWindow->GetPixmapHeight() == totalPixelHeight))) - { - XFreePixmap (dpy, (Pixmap) m_targetWindow->GetBackingPixmap()); - m_targetWindow->SetBackingPixmap((WXPixmap) 0); - } - - if (!m_targetWindow->GetBackingPixmap() && - (m_xScrollLines != 0) && (m_yScrollLines != 0)) - { - int depth = wxDisplayDepth(); - m_targetWindow->SetPixmapWidth(totalPixelWidth); - m_targetWindow->SetPixmapHeight(totalPixelHeight); - m_targetWindow->SetBackingPixmap((WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), - m_targetWindow->GetPixmapWidth(), m_targetWindow->GetPixmapHeight(), depth)); - } - - } -#endif // Motif - - if (oldXScroll != m_xScrollPosition) - { - if (m_xScrollingEnabled) - m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0, - GetScrollRect() ); - else - m_targetWindow->Refresh(true, GetScrollRect()); - } - - if (oldYScroll != m_yScrollPosition) - { - if (m_yScrollingEnabled) - m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), - GetScrollRect() ); - else - m_targetWindow->Refresh(true, GetScrollRect()); - } -} - -void wxScrollHelper::DoPrepareDC(wxDC& dc) +void wxScrollHelperBase::DoPrepareDC(wxDC& dc) { wxPoint pt = dc.GetDeviceOrigin(); #ifdef __WXGTK__ @@ -853,7 +668,7 @@ void wxScrollHelper::DoPrepareDC(wxDC& dc) dc.SetUserScale( m_scaleX, m_scaleY ); } -void wxScrollHelper::SetScrollRate( int xstep, int ystep ) +void wxScrollHelperBase::SetScrollRate( int xstep, int ystep ) { int old_x = m_xScrollPixelsPerLine * m_xScrollPosition; int old_y = m_yScrollPixelsPerLine * m_yScrollPosition; @@ -871,7 +686,7 @@ void wxScrollHelper::SetScrollRate( int xstep, int ystep ) AdjustScrollbars(); } -void wxScrollHelper::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const +void wxScrollHelperBase::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const { if ( x_unit ) *x_unit = m_xScrollPixelsPerLine; @@ -880,7 +695,7 @@ void wxScrollHelper::GetScrollPixelsPerUnit (int *x_unit, int *y_unit) const } -int wxScrollHelper::GetScrollLines( int orient ) const +int wxScrollHelperBase::GetScrollLines( int orient ) const { if ( orient == wxHORIZONTAL ) return m_xScrollLines; @@ -888,7 +703,7 @@ int wxScrollHelper::GetScrollLines( int orient ) const return m_yScrollLines; } -int wxScrollHelper::GetScrollPageSize(int orient) const +int wxScrollHelperBase::GetScrollPageSize(int orient) const { if ( orient == wxHORIZONTAL ) return m_xScrollLinesPerPage; @@ -896,7 +711,7 @@ int wxScrollHelper::GetScrollPageSize(int orient) const return m_yScrollLinesPerPage; } -void wxScrollHelper::SetScrollPageSize(int orient, int pageSize) +void wxScrollHelperBase::SetScrollPageSize(int orient, int pageSize) { if ( orient == wxHORIZONTAL ) m_xScrollLinesPerPage = pageSize; @@ -904,147 +719,62 @@ void wxScrollHelper::SetScrollPageSize(int orient, int pageSize) m_yScrollLinesPerPage = pageSize; } -/* - * Scroll to given position (scroll position, not pixel position) - */ -void wxScrollHelper::DoScroll( int x_pos, int y_pos ) +void wxScrollHelperBase::EnableScrolling (bool x_scroll, bool y_scroll) { - if (!m_targetWindow) - return; - - if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && - ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; + m_xScrollingEnabled = x_scroll; + m_yScrollingEnabled = y_scroll; +} - int w = 0, h = 0; - GetTargetSize(&w, &h); +// Where the current view starts from +void wxScrollHelperBase::DoGetViewStart (int *x, int *y) const +{ + if ( x ) + *x = m_xScrollPosition; + if ( y ) + *y = m_yScrollPosition; +} - // compute new position: - int new_x = m_xScrollPosition; - int new_y = m_yScrollPosition; +void wxScrollHelperBase::DoCalcScrolledPosition(int x, int y, + int *xx, int *yy) const +{ + if ( xx ) + *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; + if ( yy ) + *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; +} - if ((x_pos != -1) && (m_xScrollPixelsPerLine)) - { - new_x = x_pos; +void wxScrollHelperBase::DoCalcUnscrolledPosition(int x, int y, + int *xx, int *yy) const +{ + if ( xx ) + *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; + if ( yy ) + *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine; +} - // Calculate page size i.e. number of scroll units you get on the - // current client window - int noPagePositions = w/m_xScrollPixelsPerLine; - if (noPagePositions < 1) noPagePositions = 1; +// ---------------------------------------------------------------------------- +// geometry +// ---------------------------------------------------------------------------- - // Correct position if greater than extent of canvas minus - // the visible portion of it or if below zero - new_x = wxMin( m_xScrollLines-noPagePositions, new_x ); - new_x = wxMax( 0, new_x ); - } - if ((y_pos != -1) && (m_yScrollPixelsPerLine)) +bool wxScrollHelperBase::ScrollLayout() +{ + if ( m_win->GetSizer() && m_targetWindow == m_win ) { - new_y = y_pos; - - // Calculate page size i.e. number of scroll units you get on the - // current client window - int noPagePositions = h/m_yScrollPixelsPerLine; - if (noPagePositions < 1) noPagePositions = 1; + // If we're the scroll target, take into account the + // virtual size and scrolled position of the window. - // Correct position if greater than extent of canvas minus - // the visible portion of it or if below zero - new_y = wxMin( m_yScrollLines-noPagePositions, new_y ); - new_y = wxMax( 0, new_y ); + int x = 0, y = 0, w = 0, h = 0; + CalcScrolledPosition(0,0, &x,&y); + m_win->GetVirtualSize(&w, &h); + m_win->GetSizer()->SetDimension(x, y, w, h); + return true; } - if ( new_x == m_xScrollPosition && new_y == m_yScrollPosition ) - return; // nothing to do, the position didn't change + // fall back to default for LayoutConstraints + return m_win->wxWindow::Layout(); +} - // flush all pending repaints before we change m_{x,y}ScrollPosition, as - // otherwise invalidated area could be updated incorrectly later when - // ScrollWindow() makes sure they're repainted before scrolling them - m_targetWindow->Update(); - - // update the position and scroll the window now: - if (m_xScrollPosition != new_x) - { - int old_x = m_xScrollPosition; - m_xScrollPosition = new_x; - m_win->SetScrollPos( wxHORIZONTAL, new_x ); - m_targetWindow->ScrollWindow( (old_x-new_x)*m_xScrollPixelsPerLine, 0, - GetScrollRect() ); - } - - if (m_yScrollPosition != new_y) - { - int old_y = m_yScrollPosition; - m_yScrollPosition = new_y; - m_win->SetScrollPos( wxVERTICAL, new_y ); - m_targetWindow->ScrollWindow( 0, (old_y-new_y)*m_yScrollPixelsPerLine, - GetScrollRect() ); - } -} - -void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll) -{ - m_xScrollingEnabled = x_scroll; - m_yScrollingEnabled = y_scroll; -} - -void wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility horz, - wxScrollbarVisibility vert) -{ - if ( horz != m_xVisibility || vert != m_yVisibility ) - { - m_xVisibility = horz; - m_yVisibility = vert; - - AdjustScrollbars(); - } -} - -// Where the current view starts from -void wxScrollHelper::DoGetViewStart (int *x, int *y) const -{ - if ( x ) - *x = m_xScrollPosition; - if ( y ) - *y = m_yScrollPosition; -} - -void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const -{ - if ( xx ) - *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; - if ( yy ) - *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; -} - -void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const -{ - if ( xx ) - *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; - if ( yy ) - *yy = y + m_yScrollPosition * m_yScrollPixelsPerLine; -} - -// ---------------------------------------------------------------------------- -// geometry -// ---------------------------------------------------------------------------- - -bool wxScrollHelper::ScrollLayout() -{ - if ( m_win->GetSizer() && m_targetWindow == m_win ) - { - // If we're the scroll target, take into account the - // virtual size and scrolled position of the window. - - int x = 0, y = 0, w = 0, h = 0; - CalcScrolledPosition(0,0, &x,&y); - m_win->GetVirtualSize(&w, &h); - m_win->GetSizer()->SetDimension(x, y, w, h); - return true; - } - - // fall back to default for LayoutConstraints - return m_win->wxWindow::Layout(); -} - -void wxScrollHelper::ScrollDoSetVirtualSize(int x, int y) +void wxScrollHelperBase::ScrollDoSetVirtualSize(int x, int y) { m_win->wxWindow::DoSetVirtualSize( x, y ); AdjustScrollbars(); @@ -1055,7 +785,7 @@ void wxScrollHelper::ScrollDoSetVirtualSize(int x, int y) // wxWindow's GetBestVirtualSize returns the actual window size, // whereas we want to return the virtual size -wxSize wxScrollHelper::ScrollGetBestVirtualSize() const +wxSize wxScrollHelperBase::ScrollGetBestVirtualSize() const { wxSize clientSize(m_win->GetClientSize()); if ( m_win->GetSizer() ) @@ -1069,7 +799,7 @@ wxSize wxScrollHelper::ScrollGetBestVirtualSize() const // ---------------------------------------------------------------------------- // Default OnSize resets scrollbars, if any -void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event)) +void wxScrollHelperBase::HandleOnSize(wxSizeEvent& WXUNUSED(event)) { if ( m_targetWindow->GetAutoLayout() ) { @@ -1086,7 +816,7 @@ void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event)) // This calls OnDraw, having adjusted the origin according to the current // scroll position -void wxScrollHelper::HandleOnPaint(wxPaintEvent& WXUNUSED(event)) +void wxScrollHelperBase::HandleOnPaint(wxPaintEvent& WXUNUSED(event)) { // don't use m_targetWindow here, this is always called for ourselves wxPaintDC dc(m_win); @@ -1099,95 +829,79 @@ void wxScrollHelper::HandleOnPaint(wxPaintEvent& WXUNUSED(event)) // compatibility here - if we used OnKeyDown(), the programs which process // arrows themselves in their OnChar() would never get the message and like // this they always have the priority -void wxScrollHelper::HandleOnChar(wxKeyEvent& event) +void wxScrollHelperBase::HandleOnChar(wxKeyEvent& event) { - int stx = 0, sty = 0, // view origin - szx = 0, szy = 0, // view size (total) - clix = 0, cliy = 0; // view size (on screen) - - GetViewStart(&stx, &sty); - GetTargetSize(&clix, &cliy); - m_targetWindow->GetVirtualSize(&szx, &szy); - - if( m_xScrollPixelsPerLine ) - { - clix /= m_xScrollPixelsPerLine; - szx /= m_xScrollPixelsPerLine; - } - else - { - clix = 0; - szx = -1; - } - if( m_yScrollPixelsPerLine ) - { - cliy /= m_yScrollPixelsPerLine; - szy /= m_yScrollPixelsPerLine; - } - else + if ( !m_kbdScrollingEnabled ) { - cliy = 0; - szy = -1; + event.Skip(); + return; } - int xScrollOld = m_xScrollPosition, - yScrollOld = m_yScrollPosition; + // prepare the event this key press maps to + wxScrollWinEvent newEvent; + + newEvent.SetPosition(0); + newEvent.SetEventObject(m_win); + newEvent.SetId(m_win->GetId()); + + // this is the default, it's changed to wxHORIZONTAL below if needed + newEvent.SetOrientation(wxVERTICAL); + + // some key events result in scrolling in both horizontal and vertical + // direction, e.g. Ctrl-{Home,End}, if this flag is true we should generate + // a second event in horizontal direction in addition to the primary one + bool sendHorizontalToo = false; - int dsty; switch ( event.GetKeyCode() ) { case WXK_PAGEUP: - dsty = sty - (5 * cliy / 6); - Scroll(-1, (dsty == -1) ? 0 : dsty); + newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEUP); break; case WXK_PAGEDOWN: - Scroll(-1, sty + (5 * cliy / 6)); + newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEDOWN); break; case WXK_HOME: - Scroll(0, event.ControlDown() ? 0 : -1); - break; + newEvent.SetEventType(wxEVT_SCROLLWIN_TOP); - case WXK_END: - Scroll(szx - clix, event.ControlDown() ? szy - cliy : -1); + sendHorizontalToo = event.ControlDown(); break; - case WXK_UP: - Scroll(-1, sty - 1); - break; + case WXK_END: + newEvent.SetEventType(wxEVT_SCROLLWIN_BOTTOM); - case WXK_DOWN: - Scroll(-1, sty + 1); + sendHorizontalToo = event.ControlDown(); break; case WXK_LEFT: - Scroll(stx - 1, -1); + newEvent.SetOrientation(wxHORIZONTAL); + // fall through + + case WXK_UP: + newEvent.SetEventType(wxEVT_SCROLLWIN_LINEUP); break; case WXK_RIGHT: - Scroll(stx + 1, -1); + newEvent.SetOrientation(wxHORIZONTAL); + // fall through + + case WXK_DOWN: + newEvent.SetEventType(wxEVT_SCROLLWIN_LINEDOWN); break; default: - // not for us + // not a scrolling key event.Skip(); + return; } - if ( m_xScrollPosition != xScrollOld ) - { - wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_xScrollPosition, - wxHORIZONTAL); - evt.SetEventObject(m_win); - m_win->GetEventHandler()->ProcessEvent(evt); - } + m_win->ProcessWindowEvent(newEvent); - if ( m_yScrollPosition != yScrollOld ) + if ( sendHorizontalToo ) { - wxScrollWinEvent evt(wxEVT_SCROLLWIN_THUMBTRACK, m_yScrollPosition, - wxVERTICAL); - evt.SetEventObject(m_win); - m_win->GetEventHandler()->ProcessEvent(evt); + newEvent.SetOrientation(wxHORIZONTAL); + m_win->ProcessWindowEvent(newEvent); } } @@ -1196,32 +910,28 @@ void wxScrollHelper::HandleOnChar(wxKeyEvent& event) // a captured mouse is being held outside the window // ---------------------------------------------------------------------------- -bool wxScrollHelper::SendAutoScrollEvents(wxScrollWinEvent& event) const +bool wxScrollHelperBase::SendAutoScrollEvents(wxScrollWinEvent& event) const { // only send the event if the window is scrollable in this direction wxWindow *win = (wxWindow *)event.GetEventObject(); return win->HasScrollbar(event.GetOrientation()); } -void wxScrollHelper::StopAutoScrolling() +void wxScrollHelperBase::StopAutoScrolling() { #if wxUSE_TIMER - if ( m_timerAutoScroll ) - { - delete m_timerAutoScroll; - m_timerAutoScroll = (wxTimer *)NULL; - } + wxDELETE(m_timerAutoScroll); #endif } -void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event) +void wxScrollHelperBase::HandleOnMouseEnter(wxMouseEvent& event) { StopAutoScrolling(); event.Skip(); } -void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) +void wxScrollHelperBase::HandleOnMouseLeave(wxMouseEvent& event) { // don't prevent the usual processing of the event from taking place event.Skip(); @@ -1262,7 +972,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) // but seems to happen sometimes under wxMSW - maybe it's a bug // there but for now just ignore it - //wxFAIL_MSG( _T("can't understand where has mouse gone") ); + //wxFAIL_MSG( wxT("can't understand where has mouse gone") ); return; } @@ -1292,7 +1002,7 @@ void wxScrollHelper::HandleOnMouseLeave(wxMouseEvent& event) #if wxUSE_MOUSEWHEEL -void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event) +void wxScrollHelperBase::HandleOnMouseWheel(wxMouseEvent& event) { m_wheelRotation += event.GetWheelRotation(); int lines = m_wheelRotation / event.GetWheelDelta(); @@ -1307,6 +1017,9 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event) newEvent.SetOrientation( event.GetWheelAxis() == 0 ? wxVERTICAL : wxHORIZONTAL); newEvent.SetEventObject(m_win); + if ( event.GetWheelAxis() == wxMOUSE_WHEEL_HORIZONTAL ) + lines = -lines; + if (event.IsPageScroll()) { if (lines > 0) @@ -1333,7 +1046,7 @@ void wxScrollHelper::HandleOnMouseWheel(wxMouseEvent& event) #endif // wxUSE_MOUSEWHEEL -void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) +void wxScrollHelperBase::HandleOnChildFocus(wxChildFocusEvent& event) { // this event should be processed by all windows in parenthood chain, // e.g. so that nested wxScrolledWindows work correctly @@ -1345,7 +1058,7 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) if ( win == m_targetWindow ) return; // nothing to do -#ifdef __WXMAC__ +#if defined( __WXOSX__ ) && wxUSE_SCROLLBAR if (wxDynamicCast(win, wxScrollBar)) return; #endif @@ -1377,7 +1090,7 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) win->GetParent() == m_targetWindow) // if win is a wxPanel and receives the focus, it should not be // scrolled into view - return; + return; const wxRect viewRect(m_targetWindow->GetClientRect()); @@ -1387,7 +1100,7 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) // part of a wxComboCtrl visible and the button would still be outside the // scrolled area. But do so only if the parent fits *entirely* inside the // scrolled window. In other situations, such as nested wxPanel or - // wxScrolledWindows, the parent might be way to big to fit inside the + // wxScrolledWindows, the parent might be way too big to fit inside the // scrolled window. If that is the case, then make only the focused window // visible if ( win->GetParent() != m_targetWindow) @@ -1397,7 +1110,7 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) if (parent_size.GetWidth() <= viewRect.GetWidth() && parent_size.GetHeight() <= viewRect.GetHeight()) // make the immediate parent visible instead of the focused control - win=parent; + win=parent; } // make win position relative to the m_targetWindow viewing area instead of @@ -1474,12 +1187,316 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) Scroll(startx, starty); } + +#ifdef wxHAS_GENERIC_SCROLLWIN + +// ---------------------------------------------------------------------------- +// wxScrollHelper implementation +// ---------------------------------------------------------------------------- + +wxScrollHelper::wxScrollHelper(wxWindow *winToScroll) + : wxScrollHelperBase(winToScroll) +{ + m_xVisibility = + m_yVisibility = wxSHOW_SB_DEFAULT; +} + +void wxScrollHelper::DoShowScrollbars(wxScrollbarVisibility horz, + wxScrollbarVisibility vert) +{ + if ( horz != m_xVisibility || vert != m_yVisibility ) + { + m_xVisibility = horz; + m_yVisibility = vert; + + AdjustScrollbars(); + } +} + +void +wxScrollHelper::DoAdjustScrollbar(int orient, + int clientSize, + int virtSize, + int pixelsPerUnit, + int& scrollUnits, + int& scrollPosition, + int& scrollLinesPerPage, + wxScrollbarVisibility visibility) +{ + // scroll lines per page: if 0, no scrolling is needed + // check if we need scrollbar in this direction at all + if ( pixelsPerUnit == 0 || clientSize >= virtSize ) + { + // scrolling is disabled or unnecessary + scrollUnits = + scrollPosition = 0; + scrollLinesPerPage = 0; + } + else // might need scrolling + { + // Round up integer division to catch any "leftover" client space. + scrollUnits = (virtSize + pixelsPerUnit - 1) / pixelsPerUnit; + + // Calculate the number of fully scroll units + scrollLinesPerPage = clientSize / pixelsPerUnit; + + if ( scrollLinesPerPage >= scrollUnits ) + { + // we're big enough to not need scrolling + scrollUnits = + scrollPosition = 0; + scrollLinesPerPage = 0; + } + else // we do need a scrollbar + { + if ( scrollLinesPerPage < 1 ) + scrollLinesPerPage = 1; + + // Correct position if greater than extent of canvas minus + // the visible portion of it or if below zero + const int posMax = scrollUnits - scrollLinesPerPage; + if ( scrollPosition > posMax ) + scrollPosition = posMax; + else if ( scrollPosition < 0 ) + scrollPosition = 0; + } + } + + // in wxSHOW_SB_NEVER case don't show the scrollbar even if it's needed, in + // wxSHOW_SB_ALWAYS case show the scrollbar even if it's not needed by + // passing a special range value to SetScrollbar() + int range; + switch ( visibility ) + { + case wxSHOW_SB_NEVER: + range = 0; + break; + + case wxSHOW_SB_ALWAYS: + range = scrollUnits ? scrollUnits : -1; + break; + + default: + wxFAIL_MSG( wxS("unknown scrollbar visibility") ); + // fall through + + case wxSHOW_SB_DEFAULT: + range = scrollUnits; + break; + + } + + m_win->SetScrollbar(orient, scrollPosition, scrollLinesPerPage, range); +} + +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; + } + + int oldXScroll = m_xScrollPosition; + int oldYScroll = m_yScrollPosition; + + // we may need to readjust the scrollbars several times as enabling one of + // them reduces the area available for the window contents and so can make + // the other scrollbar necessary now although it wasn't necessary before + // + // VZ: normally this loop should be over in at most 2 iterations, I don't + // know why do we need 5 of them + for ( int iterationCount = 0; iterationCount < 5; iterationCount++ ) + { + wxSize clientSize = GetTargetSize(); + const wxSize virtSize = m_targetWindow->GetVirtualSize(); + + // this block of code tries to work around the following problem: the + // window could have been just resized to have enough space to show its + // full contents without the scrollbars, but its client size could be + // not big enough because it does have the scrollbars right now and so + // the scrollbars would remain even though we don't need them any more + // + // to prevent this from happening, check if we have enough space for + // everything without the scrollbars and explicitly disable them then + const wxSize availSize = GetSizeAvailableForScrollTarget( + m_win->GetSize() - m_win->GetWindowBorderSize()); + if ( availSize != clientSize ) + { + if ( availSize.x >= virtSize.x && availSize.y >= virtSize.y ) + { + // this will be enough to make the scrollbars disappear below + // and then the client size will indeed become equal to the + // full available size + clientSize = availSize; + } + } + + + DoAdjustScrollbar(wxHORIZONTAL, + clientSize.x, + virtSize.x, + m_xScrollPixelsPerLine, + m_xScrollLines, + m_xScrollPosition, + m_xScrollLinesPerPage, + m_xVisibility); + + DoAdjustScrollbar(wxVERTICAL, + clientSize.y, + virtSize.y, + m_yScrollPixelsPerLine, + m_yScrollLines, + m_yScrollPosition, + m_yScrollLinesPerPage, + m_yVisibility); + + + // If a scrollbar (dis)appeared as a result of this, we need to adjust + // them again but if the client size didn't change, then we're done + if ( GetTargetSize() == clientSize ) + break; + } + +#ifdef __WXMOTIF__ + // Sorry, some Motif-specific code to implement a backing pixmap + // for the wxRETAINED style. Implementing a backing store can't + // be entirely generic because it relies on the wxWindowDC implementation + // to duplicate X drawing calls for the backing pixmap. + + if ( m_targetWindow->GetWindowStyle() & wxRETAINED ) + { + Display* dpy = XtDisplay((Widget)m_targetWindow->GetMainWidget()); + + int totalPixelWidth = m_xScrollLines * m_xScrollPixelsPerLine; + int totalPixelHeight = m_yScrollLines * m_yScrollPixelsPerLine; + if (m_targetWindow->GetBackingPixmap() && + !((m_targetWindow->GetPixmapWidth() == totalPixelWidth) && + (m_targetWindow->GetPixmapHeight() == totalPixelHeight))) + { + XFreePixmap (dpy, (Pixmap) m_targetWindow->GetBackingPixmap()); + m_targetWindow->SetBackingPixmap((WXPixmap) 0); + } + + if (!m_targetWindow->GetBackingPixmap() && + (m_xScrollLines != 0) && (m_yScrollLines != 0)) + { + int depth = wxDisplayDepth(); + m_targetWindow->SetPixmapWidth(totalPixelWidth); + m_targetWindow->SetPixmapHeight(totalPixelHeight); + m_targetWindow->SetBackingPixmap((WXPixmap) XCreatePixmap (dpy, RootWindow (dpy, DefaultScreen (dpy)), + m_targetWindow->GetPixmapWidth(), m_targetWindow->GetPixmapHeight(), depth)); + } + + } +#endif // Motif + + if (oldXScroll != m_xScrollPosition) + { + if (m_xScrollingEnabled) + m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0, + GetScrollRect() ); + else + m_targetWindow->Refresh(true, GetScrollRect()); + } + + if (oldYScroll != m_yScrollPosition) + { + if (m_yScrollingEnabled) + m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition), + GetScrollRect() ); + else + m_targetWindow->Refresh(true, GetScrollRect()); + } +} + +void wxScrollHelper::DoScroll( int x_pos, int y_pos ) +{ + if (!m_targetWindow) + return; + + if (((x_pos == -1) || (x_pos == m_xScrollPosition)) && + ((y_pos == -1) || (y_pos == m_yScrollPosition))) return; + + int w = 0, h = 0; + GetTargetSize(&w, &h); + + // compute new position: + int new_x = m_xScrollPosition; + int new_y = m_yScrollPosition; + + if ((x_pos != -1) && (m_xScrollPixelsPerLine)) + { + new_x = x_pos; + + // Calculate page size i.e. number of scroll units you get on the + // current client window + int noPagePositions = w/m_xScrollPixelsPerLine; + if (noPagePositions < 1) noPagePositions = 1; + + // Correct position if greater than extent of canvas minus + // the visible portion of it or if below zero + new_x = wxMin( m_xScrollLines-noPagePositions, new_x ); + new_x = wxMax( 0, new_x ); + } + if ((y_pos != -1) && (m_yScrollPixelsPerLine)) + { + new_y = y_pos; + + // Calculate page size i.e. number of scroll units you get on the + // current client window + int noPagePositions = h/m_yScrollPixelsPerLine; + if (noPagePositions < 1) noPagePositions = 1; + + // Correct position if greater than extent of canvas minus + // the visible portion of it or if below zero + new_y = wxMin( m_yScrollLines-noPagePositions, new_y ); + new_y = wxMax( 0, new_y ); + } + + if ( new_x == m_xScrollPosition && new_y == m_yScrollPosition ) + return; // nothing to do, the position didn't change + + // flush all pending repaints before we change m_{x,y}ScrollPosition, as + // otherwise invalidated area could be updated incorrectly later when + // ScrollWindow() makes sure they're repainted before scrolling them + m_targetWindow->Update(); + + // update the position and scroll the window now: + if (m_xScrollPosition != new_x) + { + int old_x = m_xScrollPosition; + m_xScrollPosition = new_x; + m_win->SetScrollPos( wxHORIZONTAL, new_x ); + m_targetWindow->ScrollWindow( (old_x-new_x)*m_xScrollPixelsPerLine, 0, + GetScrollRect() ); + } + + if (m_yScrollPosition != new_y) + { + int old_y = m_yScrollPosition; + m_yScrollPosition = new_y; + m_win->SetScrollPos( wxVERTICAL, new_y ); + m_targetWindow->ScrollWindow( 0, (old_y-new_y)*m_yScrollPixelsPerLine, + GetScrollRect() ); + } +} + +#endif // wxHAS_GENERIC_SCROLLWIN + // ---------------------------------------------------------------------------- // wxScrolled and wxScrolledWindow implementation // ---------------------------------------------------------------------------- wxSize wxScrolledT_Helper::FilterBestSize(const wxWindow *win, - const wxScrollHelperNative *helper, + const wxScrollHelper *helper, const wxSize& origBest) { // NB: We don't do this in WX_FORWARD_TO_SCROLL_HELPER, because not