#include "wx/scrolwin.h"
#include "wx/panel.h"
#include "wx/timer.h"
+#include "wx/sizer.h"
#ifdef __WXMSW__
#include <windows.h> // for DLGC_WANTARROWS
{
wxEventType evType = event.GetEventType();
- // always process the size events ourselves, even if the user code handles
- // them as well, as we need to AdjustScrollbars()
- if ( evType == wxEVT_SIZE )
- {
- m_scrollHelper->HandleOnSize((wxSizeEvent &)event);
- }
-
// 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
// user code defined OnPaint() in the derived class)
m_hasDrawnWindow = TRUE;
- if ( wxEvtHandler::ProcessEvent(event) )
+ // pass it on to the real handler
+ bool processed = wxEvtHandler::ProcessEvent(event);
+
+ // always process the size events ourselves, even if the user code handles
+ // them as well, as we need to AdjustScrollbars()
+ //
+ // NB: it is important to do it after processing the event in the normal
+ // way as HandleOnSize() may generate a wxEVT_SIZE itself if the
+ // scrollbar[s] (dis)appear and it should be seen by the user code
+ // after this one
+ 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 )
+ if ( m_hasDrawnWindow )
{
return TRUE;
}
}
// ----------------------------------------------------------------------------
-// target window handling
+// [target] window handling
// ----------------------------------------------------------------------------
void wxScrollHelper::DeleteEvtHandler()
{
- // FIXME: we should search for m_handler in the handler list
- if ( m_targetWindow )
+ // search for m_handler in the handler list
+ if ( m_win && m_handler )
{
- m_targetWindow->PopEventHandler(TRUE /* Delete old event handler*/);
+ if ( m_win->RemoveEventHandler(m_handler) )
+ {
+ delete m_handler;
+ }
+ //else: something is very wrong, so better [maybe] leak memory than
+ // risk a crash because of double deletion
+
+ m_handler = NULL;
}
}
m_win = win;
+ // by default, the associated window is also the target window
DoSetTargetWindow(win);
}
m_targetWindow = target;
// install the event handler which will intercept the events we're
- // interested in
- m_handler = new wxScrollHelperEvtHandler(this);
- m_targetWindow->PushEventHandler(m_handler);
+ // interested in (but only do it for our real window, not the target window
+ // which we scroll - we don't need to hijack its events)
+ if ( m_targetWindow == m_win )
+ {
+ // if we already have a handler, delete it first
+ DeleteEvtHandler();
+
+ m_handler = new wxScrollHelperEvtHandler(this);
+ m_targetWindow->PushEventHandler(m_handler);
+ }
}
-void wxScrollHelper::SetTargetWindow( wxWindow *target )
+void wxScrollHelper::SetTargetWindow(wxWindow *target)
{
wxCHECK_RET( target, wxT("target window must not be NULL") );
if ( target == m_targetWindow )
return;
- DeleteEvtHandler();
-
DoSetTargetWindow(target);
}
if (orient == wxHORIZONTAL)
{
m_xScrollPosition += nScrollInc;
- m_targetWindow->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
+ m_win->SetScrollPos(wxHORIZONTAL, m_xScrollPosition);
}
else
{
m_yScrollPosition += nScrollInc;
- m_targetWindow->SetScrollPos(wxVERTICAL, m_yScrollPosition);
+ m_win->SetScrollPos(wxVERTICAL, m_yScrollPosition);
}
bool needsRefresh = FALSE;
m_xScrollPosition = wxMin( m_xScrollLines-noPagePositions, m_xScrollPosition);
m_xScrollPosition = wxMax( 0, m_xScrollPosition );
- m_targetWindow->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
+ m_win->SetScrollbar(wxHORIZONTAL, m_xScrollPosition, noPagePositions, m_xScrollLines);
// The amount by which we scroll when paging
SetScrollPageSize(wxHORIZONTAL, noPagePositions);
}
else
{
m_xScrollPosition = 0;
- m_targetWindow->SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
+ m_win->SetScrollbar (wxHORIZONTAL, 0, 0, 0, FALSE);
}
if (m_yScrollLines > 0)
m_yScrollPosition = wxMin( m_yScrollLines-noPagePositions, m_yScrollPosition );
m_yScrollPosition = wxMax( 0, m_yScrollPosition );
- m_targetWindow->SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
+ m_win->SetScrollbar(wxVERTICAL, m_yScrollPosition, noPagePositions, m_yScrollLines);
// The amount by which we scroll when paging
SetScrollPageSize(wxVERTICAL, noPagePositions);
}
else
{
m_yScrollPosition = 0;
- m_targetWindow->SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
+ m_win->SetScrollbar (wxVERTICAL, 0, 0, 0, FALSE);
}
if (oldXScroll != m_xScrollPosition)
m_xScrollPosition = wxMax( 0, m_xScrollPosition );
if (old_x != m_xScrollPosition) {
- m_targetWindow->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
+ m_win->SetScrollPos( wxHORIZONTAL, m_xScrollPosition );
m_targetWindow->ScrollWindow( (old_x-m_xScrollPosition)*m_xScrollPixelsPerLine, 0,
GetRect() );
}
m_yScrollPosition = wxMax( 0, m_yScrollPosition );
if (old_y != m_yScrollPosition) {
- m_targetWindow->SetScrollPos( wxVERTICAL, m_yScrollPosition );
+ m_win->SetScrollPos( wxVERTICAL, m_yScrollPosition );
m_targetWindow->ScrollWindow( 0, (old_y-m_yScrollPosition)*m_yScrollPixelsPerLine,
GetRect() );
}
void wxScrollHelper::GetVirtualSize (int *x, int *y) const
{
+ wxSize sz(0, 0);
+ if (m_targetWindow)
+ sz = m_targetWindow->GetClientSize();
+
if ( x )
- *x = m_xScrollPixelsPerLine * m_xScrollLines;
+ {
+ if (m_xScrollPixelsPerLine == 0)
+ *x = sz.x;
+ else
+ *x = m_xScrollPixelsPerLine * m_xScrollLines;
+ }
if ( y )
- *y = m_yScrollPixelsPerLine * m_yScrollLines;
+ {
+ if (m_yScrollPixelsPerLine == 0)
+ *y = sz.y;
+ else
+ *y = m_yScrollPixelsPerLine * m_yScrollLines;
+ }
}
// Where the current view starts from
*y = m_yScrollPosition;
}
-void wxScrollHelper::CalcScrolledPosition(int x, int y, int *xx, int *yy) const
+void wxScrollHelper::DoCalcScrolledPosition(int x, int y, int *xx, int *yy) const
{
if ( xx )
*xx = x - m_xScrollPosition * m_xScrollPixelsPerLine;
*yy = y - m_yScrollPosition * m_yScrollPixelsPerLine;
}
-void wxScrollHelper::CalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
+void wxScrollHelper::DoCalcUnscrolledPosition(int x, int y, int *xx, int *yy) const
{
if ( xx )
*xx = x + m_xScrollPosition * m_xScrollPixelsPerLine;
// Default OnSize resets scrollbars, if any
void wxScrollHelper::HandleOnSize(wxSizeEvent& WXUNUSED(event))
{
-#if wxUSE_CONSTRAINTS
- if ( m_targetWindow->GetAutoLayout() )
- m_targetWindow->Layout();
-#endif
-
AdjustScrollbars();
}
// scroll position
void wxScrollHelper::HandleOnPaint(wxPaintEvent& WXUNUSED(event))
{
- wxPaintDC dc(m_targetWindow);
+ // don't use m_targetWindow here, this is always called for ourselves
+ wxPaintDC dc(m_win);
DoPrepareDC(dc);
OnDraw(dc);
bool ok = wxPanel::Create(parent, id, pos, size, style, name);
-#ifdef __WXMSW__
- // we need to process arrows ourselves for scrolling
- m_lDlgCode |= DLGC_WANTARROWS;
-#endif // __WXMSW__
-
return ok;
}
{
}
+bool wxGenericScrolledWindow::Layout()
+{
+ if (GetSizer())
+ {
+ // Take into account the virtual size and scrolled position of the window
+ int x, y, w, h;
+ CalcScrolledPosition(0,0, &x,&y);
+ GetVirtualSize(&w, &h);
+ GetSizer()->SetDimension(x, y, w, h);
+ return TRUE;
+ }
+
+ // fall back to default for LayoutConstraints
+ return wxPanel::Layout();
+}
+
void wxGenericScrolledWindow::OnPaint(wxPaintEvent& event)
{
// the user code didn't really draw the window if we got here, so set this
event.Skip();
}
+#ifdef __WXMSW__
+long
+wxGenericScrolledWindow::MSWWindowProc(WXUINT nMsg,
+ WXWPARAM wParam,
+ WXLPARAM lParam)
+{
+ long rc = wxPanel::MSWWindowProc(nMsg, wParam, lParam);
+
+ // we need to process arrows ourselves for scrolling
+ if ( nMsg == WM_GETDLGCODE )
+ {
+ rc |= DLGC_WANTARROWS;
+ }
+
+ return rc;
+}
+
+#endif // __WXMSW__
+
#if WXWIN_COMPATIBILITY
void wxGenericScrolledWindow::GetScrollUnitsPerPage (int *x_page, int *y_page) const
projects / wxWidgets.git / blobdiff