X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/f2a6c918e88aaa5373876be033568ba41497c968..9d5cfd0e64a2c09d957517405758de680806e674:/src/generic/scrlwing.cpp diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp index 13f1e7e5e0..85e2ef3bae 100644 --- a/src/generic/scrlwing.cpp +++ b/src/generic/scrlwing.cpp @@ -72,7 +72,7 @@ class WXDLLEXPORT wxScrollHelperEvtHandler : public wxEvtHandler { public: - wxScrollHelperEvtHandler(wxScrollHelper *scrollHelper) + wxScrollHelperEvtHandler(wxScrollHelperBase *scrollHelper) { m_scrollHelper = scrollHelper; } @@ -82,11 +82,11 @@ public: void ResetDrawnFlag() { m_hasDrawnWindow = false; } private: - wxScrollHelper *m_scrollHelper; + wxScrollHelperBase *m_scrollHelper; bool m_hasDrawnWindow; - DECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler) + wxDECLARE_NO_COPY_CLASS(wxScrollHelperEvtHandler); }; #if wxUSE_TIMER @@ -98,7 +98,8 @@ private: class wxAutoScrollTimer : public wxTimer { public: - wxAutoScrollTimer(wxWindow *winToScroll, wxScrollHelper *scroll, + wxAutoScrollTimer(wxWindow *winToScroll, + wxScrollHelperBase *scroll, wxEventType eventTypeToSend, int pos, int orient); @@ -106,12 +107,12 @@ 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 +124,7 @@ private: // ---------------------------------------------------------------------------- wxAutoScrollTimer::wxAutoScrollTimer(wxWindow *winToScroll, - wxScrollHelper *scroll, + wxScrollHelperBase *scroll, wxEventType eventTypeToSend, int pos, int orient) { @@ -303,11 +304,15 @@ bool wxScrollHelperEvtHandler::ProcessEvent(wxEvent& event) 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") ); @@ -330,21 +335,21 @@ 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(); @@ -355,13 +360,13 @@ 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; @@ -422,7 +427,7 @@ 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 ) @@ -438,13 +443,13 @@ void wxScrollHelper::DeleteEvtHandler() } } -void wxScrollHelper::ResetDrawnFlag() +void wxScrollHelperBase::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__ @@ -464,7 +469,7 @@ 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") ); @@ -474,7 +479,7 @@ void wxScrollHelper::SetTargetWindow(wxWindow *target) DoSetTargetWindow(target); } -wxWindow *wxScrollHelper::GetTargetWindow() const +wxWindow *wxScrollHelperBase::GetTargetWindow() const { return m_targetWindow; } @@ -483,7 +488,7 @@ wxWindow *wxScrollHelper::GetTargetWindow() const // scrolling implementation itself // ---------------------------------------------------------------------------- -void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) +void wxScrollHelperBase::HandleOnScroll(wxScrollWinEvent& event) { int nScrollInc = CalcScrollInc(event); if ( nScrollInc == 0 ) @@ -555,7 +560,7 @@ void wxScrollHelper::HandleOnScroll(wxScrollWinEvent& event) } } -int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) +int wxScrollHelperBase::CalcScrollInc(wxScrollWinEvent& event) { int pos = event.GetPosition(); int orient = event.GetOrientation(); @@ -644,212 +649,12 @@ int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event) return nScrollInc; } -// 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; - } - - int w = 0, h = 0; - int oldw, oldh; - - int oldXScroll = m_xScrollPosition; - int oldYScroll = m_yScrollPosition; - - // 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 - // JACS: Stop potential infinite loop by limiting number of iterations - int iterationCount = 0; - const int iterationMax = 5; - do - { - iterationCount ++; - - GetTargetSize(&w, 0); - - // scroll lines per page: if 0, no scrolling is needed - int linesPerPage; - - if ( m_xScrollPixelsPerLine == 0 ) - { - // scrolling is disabled - m_xScrollLines = 0; - m_xScrollPosition = 0; - linesPerPage = 0; - } - else // might need scrolling - { - // Round up integer division to catch any "leftover" client space. - const int wVirt = m_targetWindow->GetVirtualSize().GetWidth(); - m_xScrollLines = (wVirt + m_xScrollPixelsPerLine - 1) / m_xScrollPixelsPerLine; - - // Calculate page size i.e. number of scroll units you get on the - // current client window. - linesPerPage = w / m_xScrollPixelsPerLine; - - // Special case. When client and virtual size are very close but - // the client is big enough, kill scrollbar. - if ((linesPerPage < m_xScrollLines) && (w >= wVirt)) ++linesPerPage; - - if (linesPerPage >= m_xScrollLines) - { - // we're big enough to not need scrolling - linesPerPage = - m_xScrollLines = - m_xScrollPosition = 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_xScrollLines - linesPerPage; - if ( m_xScrollPosition > posMax ) - m_xScrollPosition = posMax; - else if ( m_xScrollPosition < 0 ) - m_xScrollPosition = 0; - } - } - - m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, - linesPerPage, m_xScrollLines); - - // The amount by which we scroll when paging - SetScrollPageSize(wxHORIZONTAL, linesPerPage); - - GetTargetSize(0, &h); - - if ( m_yScrollPixelsPerLine == 0 ) - { - // scrolling is disabled - m_yScrollLines = 0; - m_yScrollPosition = 0; - linesPerPage = 0; - } - else // might need scrolling - { - // Round up integer division to catch any "leftover" client space. - const int hVirt = m_targetWindow->GetVirtualSize().GetHeight(); - m_yScrollLines = ( hVirt + m_yScrollPixelsPerLine - 1 ) / m_yScrollPixelsPerLine; - - // Calculate page size i.e. number of scroll units you get on the - // current client window. - linesPerPage = h / m_yScrollPixelsPerLine; - - // Special case. When client and virtual size are very close but - // the client is big enough, kill scrollbar. - if ((linesPerPage < m_yScrollLines) && (h >= hVirt)) ++linesPerPage; - - 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; - } - } - - m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, - linesPerPage, m_yScrollLines); - - // The amount by which we scroll when paging - SetScrollPageSize(wxVERTICAL, linesPerPage); - - - // 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) && (iterationCount < iterationMax) ); - -#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__ // It may actually be correct to always query - // the m_sign from the DC here, but I leve the + // the m_sign from the DC here, but I leave the // #ifdef GTK for now. if (m_win->GetLayoutDirection() == wxLayout_RightToLeft) dc.SetDeviceOrigin( pt.x + m_xScrollPosition * m_xScrollPixelsPerLine, @@ -861,7 +666,7 @@ 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; @@ -879,7 +684,7 @@ 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; @@ -888,7 +693,7 @@ 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; @@ -896,7 +701,7 @@ 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; @@ -904,7 +709,7 @@ 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; @@ -912,89 +717,14 @@ void wxScrollHelper::SetScrollPageSize(int orient, int pageSize) m_yScrollLinesPerPage = pageSize; } -/* - * Scroll to given position (scroll position, not pixel position) - */ -void wxScrollHelper::Scroll( 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() ); - } -} - -void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll) +void wxScrollHelperBase::EnableScrolling (bool x_scroll, bool y_scroll) { m_xScrollingEnabled = x_scroll; m_yScrollingEnabled = y_scroll; } // Where the current view starts from -void wxScrollHelper::GetViewStart (int *x, int *y) const +void wxScrollHelperBase::DoGetViewStart (int *x, int *y) const { if ( x ) *x = m_xScrollPosition; @@ -1002,7 +732,8 @@ void wxScrollHelper::GetViewStart (int *x, int *y) const *y = m_yScrollPosition; } -void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const +void wxScrollHelperBase::DoCalcScrolledPosition(int x, int y, + int *xx, int *yy) const { if ( xx ) *xx = x - m_xScrollPosition * m_xScrollPixelsPerLine; @@ -1010,7 +741,8 @@ void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) cons *yy = y - m_yScrollPosition * m_yScrollPixelsPerLine; } -void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const +void wxScrollHelperBase::DoCalcUnscrolledPosition(int x, int y, + int *xx, int *yy) const { if ( xx ) *xx = x + m_xScrollPosition * m_xScrollPixelsPerLine; @@ -1022,7 +754,7 @@ void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) co // geometry // ---------------------------------------------------------------------------- -bool wxScrollHelper::ScrollLayout() +bool wxScrollHelperBase::ScrollLayout() { if ( m_win->GetSizer() && m_targetWindow == m_win ) { @@ -1040,7 +772,7 @@ bool wxScrollHelper::ScrollLayout() 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(); @@ -1051,7 +783,7 @@ 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() ) @@ -1065,7 +797,7 @@ 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() ) { @@ -1082,7 +814,7 @@ 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); @@ -1095,7 +827,7 @@ 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) @@ -1192,32 +924,32 @@ 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; + m_timerAutoScroll = NULL; } #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(); @@ -1288,7 +1020,7 @@ 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(); @@ -1329,7 +1061,7 @@ 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 @@ -1341,22 +1073,89 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) if ( win == m_targetWindow ) return; // nothing to do - while ( win->GetParent() != m_targetWindow ) +#ifdef __WXMAC__ + if (wxDynamicCast(win, wxScrollBar)) + return; +#endif + + // Fixing ticket: http://trac.wxwidgets.org/ticket/9563 + // When a child inside a wxControlContainer receives a focus, the + // wxControlContainer generates an artificial wxChildFocusEvent for + // itself, telling its parent that 'it' received the focus. The effect is + // that this->HandleOnChildFocus is called twice, first with the + // artificial wxChildFocusEvent and then with the original event. We need + // to ignore the artificial event here or otherwise HandleOnChildFocus + // would first scroll the target window to make the entire + // wxControlContainer visible and immediately afterwards scroll the target + // window again to make the child widget visible. This leads to ugly + // flickering when using nested wxPanels/wxScrolledWindows. + // + // Ignore this event if 'win' is derived from wxControlContainer AND its + // parent is the m_targetWindow AND 'win' is not actually reciving the + // focus (win != FindFocus). TODO: This affects all wxControlContainer + // objects, but wxControlContainer is not part of the wxWidgets RTTI and + // so wxDynamicCast(win, wxControlContainer) does not compile. Find a way + // to determine if 'win' derives from wxControlContainer. Until then, + // testing if 'win' derives from wxPanel will probably get >90% of all + // cases. + + wxWindow *actual_focus=wxWindow::FindFocus(); + if (win != actual_focus && + wxDynamicCast(win, wxPanel) != 0 && + win->GetParent() == m_targetWindow) + // if win is a wxPanel and receives the focus, it should not be + // scrolled into view + return; + + const wxRect viewRect(m_targetWindow->GetClientRect()); + + // For composite controls such as wxComboCtrl we should try to fit the + // entire control inside the visible area of the target window, not just + // the focused child of the control. Otherwise we'd make only the textctrl + // 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 + // scrolled window. If that is the case, then make only the focused window + // visible + if ( win->GetParent() != m_targetWindow) + { + wxWindow *parent=win->GetParent(); + wxSize parent_size=parent->GetSize(); + if (parent_size.GetWidth() <= viewRect.GetWidth() && + parent_size.GetHeight() <= viewRect.GetHeight()) + // make the immediate parent visible instead of the focused control + win=parent; + } + + // make win position relative to the m_targetWindow viewing area instead of + // its parent + const wxRect + winRect(m_targetWindow->ScreenToClient(win->GetScreenPosition()), + win->GetSize()); + + // check if it's fully visible + if ( viewRect.Contains(winRect) ) + { + // it is, nothing to do + return; + } + + // check if we can make it fully visible: this is only possible if it's not + // larger than our view area + if ( winRect.GetWidth() > viewRect.GetWidth() || + winRect.GetHeight() > viewRect.GetHeight() ) { - win = win->GetParent(); - if ( !win ) - return; // event is not from a child of the target window + // we can't make it fit so avoid scrolling it at all, this is only + // going to be confusing and not helpful + return; } - // if the child is not fully visible, try to scroll it into view: + + // do make the window fit inside the view area by scrolling to it int stepx, stepy; GetScrollPixelsPerUnit(&stepx, &stepy); - // NB: we don't call CalcScrolledPosition() on win->GetPosition() here, - // because children' positions are already scrolled - wxRect winrect(win->GetPosition(), win->GetSize()); - wxSize view(m_targetWindow->GetClientSize()); - int startx, starty; GetViewStart(&startx, &starty); @@ -1365,13 +1164,13 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) { int diff = 0; - if ( winrect.GetTop() < 0 ) + if ( winRect.GetTop() < 0 ) { - diff = winrect.GetTop(); + diff = winRect.GetTop(); } - else if ( winrect.GetBottom() > view.y ) + else if ( winRect.GetBottom() > viewRect.GetHeight() ) { - diff = winrect.GetBottom() - view.y + 1; + diff = winRect.GetBottom() - viewRect.GetHeight() + 1; // round up to next scroll step if we can't get exact position, // so that the window is fully visible: diff += stepy - 1; @@ -1385,13 +1184,13 @@ void wxScrollHelper::HandleOnChildFocus(wxChildFocusEvent& event) { int diff = 0; - if ( winrect.GetLeft() < 0 ) + if ( winRect.GetLeft() < 0 ) { - diff = winrect.GetLeft(); + diff = winRect.GetLeft(); } - else if ( winrect.GetRight() > view.x ) + else if ( winRect.GetRight() > viewRect.GetWidth() ) { - diff = winrect.GetRight() - view.x + 1; + diff = winRect.GetRight() - viewRect.GetWidth() + 1; // round up to next scroll step if we can't get exact position, // so that the window is fully visible: diff += stepx - 1; @@ -1403,12 +1202,316 @@ 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