if ( win == m_targetWindow )
return; // nothing to do
- while ( win->GetParent() != m_targetWindow )
+ // 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;
+
+ wxSize view(m_targetWindow->GetClientSize());
+
+ // 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)
{
- win = win->GetParent();
- if ( !win )
- return; // event is not from a child of the target window
+ wxWindow *parent=win->GetParent();
+ wxSize parent_size=parent->GetSize();
+ if (parent_size.GetWidth() <= view.GetWidth() &&
+ parent_size.GetHeight() <= view.GetHeight())
+ // make the immediate parent visible instead of the focused control
+ win=parent;
}
// if the child is not fully visible, try to scroll it into view:
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());
+ // 'win' position coordinates are relative to it's parent
+ // convert them so that they are relative to the m_targetWindow viewing area
+ wxRect winrect(m_targetWindow->ScreenToClient(win->GetScreenPosition()),
+ win->GetSize());
int startx, starty;
GetViewStart(&startx, &starty);
}
#ifdef __WXMSW__
-WXLRESULT wxScrolledT_Helper::FilterMSWWindowProc(WXLRESULT rc)
+WXLRESULT wxScrolledT_Helper::FilterMSWWindowProc(WXUINT nMsg, WXLRESULT rc)
{
#ifndef __WXWINCE__
// we need to process arrows ourselves for scrolling