// Ron Lee on 10.4.02: virtual size / auto scrollbars et al.
// Created: 01/02/97
// RCS-ID: $Id$
-// Copyright: (c) wxWindows team
+// Copyright: (c) wxWidgets team
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "genscrolwin.h"
-#endif
-
#ifdef __VMS
#define XtDisplay XTDISPLAY
#endif
#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 <windows.h> // for DLGC_WANTARROWS
+ #include "wx/msw/winundef.h"
#endif
#ifdef __WXMOTIF__
IMPLEMENT_CLASS(wxScrolledWindow, wxGenericScrolledWindow)
/*
- TODO PROPERTIES
- style wxHSCROLL | wxVSCROLL
+ TODO PROPERTIES
+ style wxHSCROLL | wxVSCROLL
*/
// ----------------------------------------------------------------------------
virtual bool ProcessEvent(wxEvent& event);
- void ResetDrawnFlag() { m_hasDrawnWindow = FALSE; }
+ void ResetDrawnFlag() { m_hasDrawnWindow = false; }
private:
wxScrollHelper *m_scrollHelper;
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
}
}
}
+#endif
// ----------------------------------------------------------------------------
// wxScrollHelperEvtHandler
// 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;
+ m_hasDrawnWindow = true;
// pass it on to the real handler
bool processed = wxEvtHandler::ProcessEvent(event);
{
m_scrollHelper->HandleOnSize((wxSizeEvent &)event);
- return TRUE;
+ return true;
}
if ( processed )
// OnDraw() below (from HandleOnPaint)
if ( m_hasDrawnWindow )
{
- return TRUE;
+ return true;
}
}
- // reset the skipped flag to FALSE as it might have been set to TRUE in
+ // reset the skipped flag to false as it might have been set to true in
// ProcessEvent() above
- event.Skip(FALSE);
+ event.Skip(false);
if ( evType == wxEVT_PAINT )
{
m_scrollHelper->HandleOnPaint((wxPaintEvent &)event);
- return TRUE;
+ return true;
}
if ( evType == wxEVT_SCROLLWIN_TOP ||
return !event.GetSkipped();
}
- return FALSE;
+ return false;
}
// ----------------------------------------------------------------------------
m_yScrollLinesPerPage = 0;
m_xScrollingEnabled =
- m_yScrollingEnabled = TRUE;
+ m_yScrollingEnabled = true;
m_scaleX =
m_scaleY = 1.0;
// 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( w, h );
+ // m_targetWindow->SetVirtualSizeHints( w, h );
// The above should arguably be deprecated, this however we still need.
- m_targetWindow->SetVirtualSize( w, h );
+ // take care not to set 0 virtual size, 0 means that we don't have any
+ // scrollbars and hence we should use the real size instead of the virtual
+ // one which is indicated by using wxDefaultCoord
+ m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
+ h ? h : wxDefaultCoord);
if (do_refresh && !noRefresh)
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
#ifndef __WXUNIVERSAL__
// If the target is not the same as the window with the scrollbars,
else
{
// otherwise this has been done by AdjustScrollbars, above
-#ifdef __WXMAC__
- m_targetWindow->Update() ;
-#endif
}
#endif // !__WXUNIVERSAL__
}
void wxScrollHelper::DoSetTargetWindow(wxWindow *target)
{
m_targetWindow = target;
+#ifdef __WXMAC__
+ target->MacSetClipChildren( true ) ;
+#endif
// install the event handler which will intercept the events we're
// interested in (but only do it for our real window, not the target window
m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
}
- bool needsRefresh = FALSE;
+ bool needsRefresh = false;
int dx = 0,
dy = 0;
if (orient == wxHORIZONTAL)
}
else
{
- needsRefresh = TRUE;
+ needsRefresh = true;
}
}
else
}
else
{
- needsRefresh = TRUE;
+ needsRefresh = true;
}
}
if ( needsRefresh )
{
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
}
else
{
m_targetWindow->ScrollWindow(dx, dy, GetScrollRect());
}
-
-#ifdef __WXMAC__
- m_targetWindow->Update() ;
-#endif
}
int wxScrollHelper::CalcScrollInc(wxScrollWinEvent& event)
{
if (m_xScrollPixelsPerLine > 0)
{
- int w, h;
- GetTargetSize(&w, &h);
-
- int nMaxWidth = m_xScrollLines*m_xScrollPixelsPerLine;
- int noPositions = (int) ( ((nMaxWidth - w)/(double)m_xScrollPixelsPerLine) + 0.5 );
- if (noPositions < 0)
- noPositions = 0;
-
- if ( (m_xScrollPosition + nScrollInc) < 0 )
- nScrollInc = -m_xScrollPosition; // As -ve as we can go
- else if ( (m_xScrollPosition + nScrollInc) > noPositions )
- nScrollInc = noPositions - m_xScrollPosition; // As +ve as we can go
+ if ( m_xScrollPosition + nScrollInc < 0 )
+ {
+ // As -ve as we can go
+ nScrollInc = -m_xScrollPosition;
+ }
+ else // check for the other bound
+ {
+ const int posMax = m_xScrollLines - m_xScrollLinesPerPage;
+ if ( m_xScrollPosition + nScrollInc > posMax )
+ {
+ // As +ve as we can go
+ nScrollInc = posMax - m_xScrollPosition;
+ }
+ }
}
else
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
}
else
{
else
{
// VZ: why do we do this? (FIXME)
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
}
}
// Adjust the scrollbars - new version.
void wxScrollHelper::AdjustScrollbars()
{
-#ifdef __WXMAC__
- m_targetWindow->Update();
-#endif
+ 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;
// 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);
- if (m_xScrollPixelsPerLine == 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;
- m_win->SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
+ linesPerPage = 0;
}
- else
+ else // might need scrolling
{
- m_xScrollLines = m_targetWindow->GetVirtualSize().GetWidth() / m_xScrollPixelsPerLine;
+ // 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
- int noPagePositions = (int) ( (w/(double)m_xScrollPixelsPerLine) + 0.5 );
- if (noPagePositions < 1) noPagePositions = 1;
- if ( noPagePositions > m_xScrollLines )
- noPagePositions = m_xScrollLines;
-
- // Correct position if greater than extent of canvas minus
- // the visible portion of it or if below zero
- m_xScrollPosition = wxMin( m_xScrollLines - noPagePositions, m_xScrollPosition);
- m_xScrollPosition = wxMax( 0, m_xScrollPosition );
-
- m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
- // The amount by which we scroll when paging
- SetScrollPageSize(wxHORIZONTAL, noPagePositions);
+ // 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;
+ }
}
- GetTargetSize(0, &h);
+ m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition,
+ linesPerPage, m_xScrollLines);
- // scroll lines per page: if 0, no scrolling is needed
- int linesPerPage;
+ // The amount by which we scroll when paging
+ SetScrollPageSize(wxHORIZONTAL, linesPerPage);
+
+ GetTargetSize(0, &h);
if ( m_yScrollPixelsPerLine == 0 )
{
}
else // might need scrolling
{
- int hVirt = m_targetWindow->GetVirtualSize().GetHeight();
- m_yScrollLines = hVirt / m_yScrollPixelsPerLine;
+ // 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
+ // current client window.
linesPerPage = h / m_yScrollPixelsPerLine;
- if ( linesPerPage >= m_yScrollLines )
+
+ // 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 =
oldh = h;
GetTargetSize( &w, &h );
- } while ( w != oldw && h != oldh );
+ } while ( (w != oldw || h != oldh) && (iterationCount < iterationMax) );
#ifdef __WXMOTIF__
// Sorry, some Motif-specific code to implement a backing pixmap
m_targetWindow->ScrollWindow( m_xScrollPixelsPerLine * (oldXScroll - m_xScrollPosition), 0,
GetScrollRect() );
else
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
}
if (oldYScroll != m_yScrollPosition)
m_targetWindow->ScrollWindow( 0, m_yScrollPixelsPerLine * (oldYScroll-m_yScrollPosition),
GetScrollRect() );
else
- m_targetWindow->Refresh(TRUE, GetScrollRect());
+ m_targetWindow->Refresh(true, GetScrollRect());
}
-
-#ifdef __WXMAC__
- m_targetWindow->Update();
-#endif
}
void wxScrollHelper::DoPrepareDC(wxDC& dc)
if (((x_pos == -1) || (x_pos == m_xScrollPosition)) &&
((y_pos == -1) || (y_pos == m_yScrollPosition))) return;
-#ifdef __WXMAC__
- m_targetWindow->Update();
-#endif
-
int w, h;
GetTargetSize(&w, &h);
GetScrollRect() );
}
}
-
-#ifdef __WXMAC__
- m_targetWindow->Update();
-#endif
-
}
void wxScrollHelper::EnableScrolling (bool x_scroll, bool y_scroll)
*y = m_yScrollPosition;
}
+#if WXWIN_COMPATIBILITY_2_2
+
+void wxScrollHelper::ViewStart(int *x, int *y) const
+{
+ GetViewStart( x, y );
+}
+
+#endif // WXWIN_COMPATIBILITY_2_2
+
void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
{
if ( xx )
// Default OnSize resets scrollbars, if any
void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
{
- if( m_win->GetAutoLayout() || m_targetWindow->GetAutoLayout() )
+ if ( m_targetWindow->GetAutoLayout() )
{
- if ( m_targetWindow != m_win )
- m_targetWindow->FitInside();
-
- m_win->FitInside();
-
- // 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();
+ wxSize size = m_targetWindow->GetBestVirtualSize();
+
+ // This will call ::Layout() and ::AdjustScrollbars()
+ m_win->SetVirtualSize( size );
}
else
+ {
AdjustScrollbars();
+ }
}
// This calls OnDraw, having adjusted the origin according to the current
void wxScrollHelper::StopAutoScrolling()
{
+#if wxUSE_TIMER
if ( m_timerAutoScroll )
{
delete m_timerAutoScroll;
m_timerAutoScroll = (wxTimer *)NULL;
}
+#endif
}
void wxScrollHelper::HandleOnMouseEnter(wxMouseEvent& event)
if ( !m_targetWindow->HasScrollbar(orient) )
return;
+#if wxUSE_TIMER
delete m_timerAutoScroll;
m_timerAutoScroll = new wxAutoScrollTimer
(
orient
);
m_timerAutoScroll->Start(50); // FIXME: make configurable
+#else
+ wxUnusedVar(pos);
+#endif
}
}
newEvent.SetPosition(0);
newEvent.SetOrientation(wxVERTICAL);
- newEvent.m_eventObject = m_win;
+ newEvent.SetEventObject(m_win);
if (event.IsPageScroll())
{
if (lines > 0)
- newEvent.m_eventType = wxEVT_SCROLLWIN_PAGEUP;
+ newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEUP);
else
- newEvent.m_eventType = wxEVT_SCROLLWIN_PAGEDOWN;
+ newEvent.SetEventType(wxEVT_SCROLLWIN_PAGEDOWN);
m_win->GetEventHandler()->ProcessEvent(newEvent);
}
{
lines *= event.GetLinesPerAction();
if (lines > 0)
- newEvent.m_eventType = wxEVT_SCROLLWIN_LINEUP;
+ newEvent.SetEventType(wxEVT_SCROLLWIN_LINEUP);
else
- newEvent.m_eventType = wxEVT_SCROLLWIN_LINEDOWN;
+ newEvent.SetEventType(wxEVT_SCROLLWIN_LINEDOWN);
int times = abs(lines);
for (; times > 0; times--)
const wxString& name)
{
m_targetWindow = this;
+#ifdef __WXMAC__
+ MacSetClipChildren( true ) ;
+#endif
- bool ok = wxPanel::Create(parent, id, pos, size, style, name);
+ bool ok = wxPanel::Create(parent, id, pos, size, style|wxHSCROLL|wxVSCROLL, name);
return ok;
}
CalcScrolledPosition(0,0, &x,&y);
GetVirtualSize(&w, &h);
GetSizer()->SetDimension(x, y, w, h);
- return TRUE;
+ return true;
}
// fall back to default for LayoutConstraints
wxPanel::DoSetVirtualSize( x, y );
AdjustScrollbars();
-#if wxUSE_CONSTRAINTS
if (GetAutoLayout())
Layout();
-#endif
+}
+
+// wxWindow's GetBestVirtualSize returns the actual window size,
+// whereas we want to return the virtual size
+wxSize wxGenericScrolledWindow::GetBestVirtualSize() const
+{
+ wxSize clientSize( GetClientSize() );
+ if (GetSizer())
+ {
+ wxSize minSize( GetSizer()->CalcMin() );
+
+ return wxSize( wxMax( clientSize.x, minSize.x ), wxMax( clientSize.y, minSize.y ) );
+ }
+ else
+ return clientSize;
+}
+
+// return the size best suited for the current window
+// (this isn't a virtual size, this is a sensible size for the window)
+wxSize wxGenericScrolledWindow::DoGetBestSize() const
+{
+ wxSize best;
+
+ if ( GetSizer() )
+ {
+ wxSize b = GetSizer()->GetMinSize();
+
+ // Only use the content to set the window size in the direction
+ // where there's no scrolling; otherwise we're going to get a huge
+ // window in the direction in which scrolling is enabled
+ int ppuX, ppuY;
+ GetScrollPixelsPerUnit(& ppuX, & ppuY);
+
+ wxSize minSize;
+ if ( GetMinSize().IsFullySpecified() )
+ minSize = GetMinSize();
+ else
+ minSize = GetSize();
+
+ if (ppuX > 0)
+ b.x = minSize.x;
+ if (ppuY > 0)
+ b.y = minSize.y;
+ best = b;
+ }
+ else
+ return wxWindow::DoGetBestSize();
+
+ // Add any difference between size and client size
+ wxSize diff = GetSize() - GetClientSize();
+ best.x += wxMax(0, diff.x);
+ best.y += wxMax(0, diff.y);
+
+ return best;
}
void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
}
#ifdef __WXMSW__
-long
+WXLRESULT
wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
WXWPARAM wParam,
WXLPARAM lParam)
{
- long rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);
+ WXLRESULT rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);
#ifndef __WXWINCE__
// we need to process arrows ourselves for scrolling
#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
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