// Created: 06.08.01
// RCS-ID: $Id$
// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// License: wxWindows license
+// License: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
- #pragma implementation "containr.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#endif
#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/event.h"
+ #include "wx/window.h"
+ #include "wx/scrolbar.h"
+ #include "wx/radiobut.h"
+ #include "wx/containr.h"
#endif //WX_PRECOMP
-#include "wx/containr.h"
+// trace mask for focus messages
+#define TRACE_FOCUS _T("focus")
// ============================================================================
// implementation
wxControlContainer::wxControlContainer(wxWindow *winParent)
{
m_winParent = winParent;
+ m_winLastFocused = NULL;
+ m_inSetFocus = false;
+}
+
+bool wxControlContainer::AcceptsFocus() const
+{
+ // if we're not shown or disabled, we can't accept focus
+ if ( m_winParent->IsShown() && m_winParent->IsEnabled() )
+ {
+ // otherwise we can accept focus either if we have no children at all
+ // (in this case we're probably not used as a container) or only when
+ // at least one child will accept focus
+ wxWindowList::compatibility_iterator node = m_winParent->GetChildren().GetFirst();
+ if ( !node )
+ return true;
+
+#ifdef __WXMAC__
+ // wxMac has eventually the two scrollbars as children, they don't count
+ // as real children in the algorithm mentioned above
+ bool hasRealChildren = false ;
+#endif
+
+ while ( node )
+ {
+ wxWindow *child = node->GetData();
+ node = node->GetNext();
+
+#ifdef __WXMAC__
+ if ( m_winParent->MacIsWindowScrollbar( child ) )
+ continue;
+ hasRealChildren = true ;
+#endif
+ if ( child->AcceptsFocus() )
+ {
+ return true;
+ }
+ }
- m_winLastFocused =
- m_winDefault = NULL;
+#ifdef __WXMAC__
+ if ( !hasRealChildren )
+ return true ;
+#endif
+ }
+
+ return false;
}
void wxControlContainer::SetLastFocus(wxWindow *win)
{
- // find the last _immediate_ child which got focus
- while ( win )
+ // the panel itself should never get the focus at all but if it does happen
+ // temporarily (as it seems to do under wxGTK), at the very least don't
+ // forget our previous m_winLastFocused
+ if ( win != m_winParent )
+ {
+ // if we're setting the focus
+ if ( win )
+ {
+ // find the last _immediate_ child which got focus
+ wxWindow *winParent = win;
+ while ( winParent != m_winParent )
+ {
+ win = winParent;
+ winParent = win->GetParent();
+
+ // Yes, this can happen, though in a totally pathological case.
+ // like when detaching a menubar from a frame with a child
+ // which has pushed itself as an event handler for the menubar.
+ // (under wxGTK)
+
+ wxASSERT_MSG( winParent,
+ _T("Setting last focus for a window that is not our child?") );
+ }
+ }
+
+ m_winLastFocused = win;
+
+ if ( win )
+ {
+ wxLogTrace(TRACE_FOCUS, _T("Set last focus to %s(%s)"),
+ win->GetClassInfo()->GetClassName(),
+ win->GetLabel().c_str());
+ }
+ else
+ {
+ wxLogTrace(TRACE_FOCUS, _T("No more last focus"));
+ }
+ }
+
+ // propagate the last focus upwards so that our parent can set focus back
+ // to us if it loses it now and regains later
+ wxWindow *parent = m_winParent->GetParent();
+ if ( parent )
+ {
+ wxChildFocusEvent eventFocus(m_winParent);
+ parent->GetEventHandler()->ProcessEvent(eventFocus);
+ }
+}
+
+// --------------------------------------------------------------------
+// The following four functions are used to find other radio buttons
+// within the same group. Used by wxSetFocusToChild on wxMSW
+// --------------------------------------------------------------------
+
+#ifdef __WXMSW__
+
+wxRadioButton* wxGetPreviousButtonInGroup(wxRadioButton *btn)
+{
+ if ( btn->HasFlag(wxRB_GROUP) || btn->HasFlag(wxRB_SINGLE) )
+ return NULL;
+
+ const wxWindowList& siblings = btn->GetParent()->GetChildren();
+ wxWindowList::compatibility_iterator nodeThis = siblings.Find(btn);
+ wxCHECK_MSG( nodeThis, NULL, _T("radio button not a child of its parent?") );
+
+ // Iterate over all previous siblings until we find the next radio button
+ wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious();
+ wxRadioButton *prevBtn = 0;
+ while (nodeBefore)
{
- wxWindow *parent = win->GetParent();
- if ( parent == m_winParent )
+ prevBtn = wxDynamicCast(nodeBefore->GetData(), wxRadioButton);
+ if (prevBtn)
break;
- win = parent;
+ nodeBefore = nodeBefore->GetPrevious();
}
- wxASSERT_MSG( win, _T("attempt to set last focus to not a child?") );
+ if (!prevBtn || prevBtn->HasFlag(wxRB_SINGLE))
+ {
+ // no more buttons in group
+ return NULL;
+ }
- m_winLastFocused = win;
+ return prevBtn;
}
+wxRadioButton* wxGetNextButtonInGroup(wxRadioButton *btn)
+{
+ if (btn->HasFlag(wxRB_SINGLE))
+ return NULL;
+
+ const wxWindowList& siblings = btn->GetParent()->GetChildren();
+ wxWindowList::compatibility_iterator nodeThis = siblings.Find(btn);
+ wxCHECK_MSG( nodeThis, NULL, _T("radio button not a child of its parent?") );
+
+ // Iterate over all previous siblings until we find the next radio button
+ wxWindowList::compatibility_iterator nodeNext = nodeThis->GetNext();
+ wxRadioButton *nextBtn = 0;
+ while (nodeNext)
+ {
+ nextBtn = wxDynamicCast(nodeNext->GetData(), wxRadioButton);
+ if (nextBtn)
+ break;
+
+ nodeNext = nodeNext->GetNext();
+ }
+
+ if ( !nextBtn || nextBtn->HasFlag(wxRB_GROUP) || nextBtn->HasFlag(wxRB_SINGLE) )
+ {
+ // no more buttons or the first button of the next group
+ return NULL;
+ }
+
+ return nextBtn;
+}
+
+wxRadioButton* wxGetFirstButtonInGroup(wxRadioButton *btn)
+{
+ while (true)
+ {
+ wxRadioButton* prevBtn = wxGetPreviousButtonInGroup(btn);
+ if (!prevBtn)
+ return btn;
+
+ btn = prevBtn;
+ }
+}
+
+wxRadioButton* wxGetLastButtonInGroup(wxRadioButton *btn)
+{
+ while (true)
+ {
+ wxRadioButton* nextBtn = wxGetNextButtonInGroup(btn);
+ if (!nextBtn)
+ return btn;
+
+ btn = nextBtn;
+ }
+}
+
+wxRadioButton* wxGetSelectedButtonInGroup(wxRadioButton *btn)
+{
+ // Find currently selected button
+ if (btn->GetValue())
+ return btn;
+
+ if (btn->HasFlag(wxRB_SINGLE))
+ return NULL;
+
+ wxRadioButton *selBtn;
+
+ // First check all previous buttons
+ for (selBtn = wxGetPreviousButtonInGroup(btn); selBtn; selBtn = wxGetPreviousButtonInGroup(selBtn))
+ if (selBtn->GetValue())
+ return selBtn;
+
+ // Now all following buttons
+ for (selBtn = wxGetNextButtonInGroup(btn); selBtn; selBtn = wxGetNextButtonInGroup(selBtn))
+ if (selBtn->GetValue())
+ return selBtn;
+
+ return NULL;
+}
+
+#endif // __WXMSW__
+
// ----------------------------------------------------------------------------
// Keyboard handling - this is the place where the TAB traversal logic is
// implemented. As this code is common to all ports, this ensures consistent
const wxWindowList& children = m_winParent->GetChildren();
+ // if we have exactly one notebook-like child window (actually it could be
+ // any window that returns true from its HasMultiplePages()), then
+ // [Shift-]Ctrl-Tab and Ctrl-PageUp/Down keys should iterate over its pages
+ // even if the focus is outside of the control because this is how the
+ // standard MSW properties dialogs behave and we do it under other platforms
+ // as well because it seems like a good idea -- but we can always put this
+ // block inside "#ifdef __WXMSW__" if it's not suitable there
+ if ( event.IsWindowChange() && !goingDown )
+ {
+ // check if we have a unique notebook-like child
+ wxWindow *bookctrl = NULL;
+ for ( wxWindowList::const_iterator i = children.begin(),
+ end = children.end();
+ i != end;
+ ++i )
+ {
+ wxWindow * const window = *i;
+ if ( window->HasMultiplePages() )
+ {
+ if ( bookctrl )
+ {
+ // this is the second book-like control already so don't do
+ // anything as we don't know which one should have its page
+ // changed
+ bookctrl = NULL;
+ break;
+ }
+
+ bookctrl = window;
+ }
+ }
+
+ if ( bookctrl && bookctrl->GetEventHandler()->ProcessEvent(event) )
+ return;
+ }
+
// there is not much to do if we don't have children and we're not
// interested in "notebook page change" events here
if ( !children.GetCount() || event.IsWindowChange() )
}
// where are we going?
- bool forward = event.GetDirection();
+ const bool forward = event.GetDirection();
// the node of the children list from which we should start looking for the
// next acceptable child
- wxWindowList::Node *node, *start_node;
+ wxWindowList::compatibility_iterator node, start_node;
// we should start from the first/last control and not from the one which
// had focus the last time if we're propagating the event downwards because
// start from first or last depending on where we're going
node = forward ? children.GetFirst() : children.GetLast();
-
- // we want to cycle over all nodes
- start_node = (wxWindowList::Node *)NULL;
}
- else
+ else // going up
{
// try to find the child which has the focus currently
if ( winFocus )
{
+#ifdef __WXMSW__
+ // If we are in a radio button group, start from the first item in the
+ // group
+ if ( event.IsFromTab() && wxIsKindOf(winFocus, wxRadioButton ) )
+ winFocus = wxGetFirstButtonInGroup((wxRadioButton*)winFocus);
+#endif
// ok, we found the focus - now is it our child?
start_node = children.Find( winFocus );
}
- else
- {
- start_node = (wxWindowList::Node *)NULL;
- }
if ( !start_node && m_winLastFocused )
{
}
// we want to cycle over all elements passing by NULL
- while ( node != start_node )
+ for ( ;; )
{
+ // don't go into infinite loop
+ if ( start_node && node && node == start_node )
+ break;
+
// Have we come to the last or first item on the panel?
if ( !node )
{
+ if ( !start_node )
+ {
+ // exit now as otherwise we'd loop forever
+ break;
+ }
+
if ( !goingDown )
{
- // Check if our (may be grand) parent is another panel: if this
+ // Check if our (maybe grand) parent is another panel: if this
// is the case, they will know what to do with this navigation
// key and so give them the chance to process it instead of
// looping inside this panel (normally, the focus will go to
wxWindow *child = node->GetData();
+#ifdef __WXMSW__
+ if ( event.IsFromTab() )
+ {
+ if ( wxIsKindOf(child, wxRadioButton) )
+ {
+ // only radio buttons with either wxRB_GROUP or wxRB_SINGLE
+ // can be tabbed to
+ if ( child->HasFlag(wxRB_GROUP) )
+ {
+ // need to tab into the active button within a group
+ wxRadioButton *rb = wxGetSelectedButtonInGroup((wxRadioButton*)child);
+ if ( rb )
+ child = rb;
+ }
+ else if ( !child->HasFlag(wxRB_SINGLE) )
+ {
+ node = forward ? node->GetNext() : node->GetPrevious();
+ continue;
+ }
+ }
+ }
+ else if ( m_winLastFocused &&
+ wxIsKindOf(m_winLastFocused, wxRadioButton) &&
+ !m_winLastFocused->HasFlag(wxRB_SINGLE) )
+ {
+ // cursor keys don't navigate out of a radio button group so
+ // find the correct radio button to focus
+ if ( forward )
+ {
+ child = wxGetNextButtonInGroup((wxRadioButton*)m_winLastFocused);
+ if ( !child )
+ {
+ // no next button in group, set it to the first button
+ child = wxGetFirstButtonInGroup((wxRadioButton*)m_winLastFocused);
+ }
+ }
+ else
+ {
+ child = wxGetPreviousButtonInGroup((wxRadioButton*)m_winLastFocused);
+ if ( !child )
+ {
+ // no previous button in group, set it to the last button
+ child = wxGetLastButtonInGroup((wxRadioButton*)m_winLastFocused);
+ }
+ }
+
+ if ( child == m_winLastFocused )
+ {
+ // must be a group consisting of only one button therefore
+ // no need to send a navigation event
+ event.Skip(false);
+ return;
+ }
+ }
+#endif // __WXMSW__
+
if ( child->AcceptsFocusFromKeyboard() )
{
// if we're setting the focus to a child panel we should prevent it
// and instead give it to the first/last child depending from which
// direction we're coming
event.SetEventObject(m_winParent);
+
+ // disable propagation for this call as otherwise the event might
+ // bounce back to us.
+ wxPropagationDisabler disableProp(event);
if ( !child->GetEventHandler()->ProcessEvent(event) )
{
- // everything is simple: just give focus to it
- child->SetFocus();
-
+ // set it first in case SetFocusFromKbd() results in focus
+ // change too
m_winLastFocused = child;
+
+ // everything is simple: just give focus to it
+ child->SetFocusFromKbd();
}
//else: the child manages its focus itself
- event.Skip( FALSE );
+ event.Skip( false );
return;
}
{
if ( child == m_winLastFocused )
m_winLastFocused = NULL;
-
- if ( child == m_winDefault )
- m_winDefault = NULL;
}
// ----------------------------------------------------------------------------
// focus handling
// ----------------------------------------------------------------------------
-void wxControlContainer::DoSetFocus()
+bool wxControlContainer::DoSetFocus()
{
- wxLogTrace(_T("focus"), _T("SetFocus on wxPanel 0x%08x."),
+ wxLogTrace(TRACE_FOCUS, _T("SetFocus on wxPanel 0x%p."),
m_winParent->GetHandle());
- // If the panel gets the focus *by way of getting it set directly*
- // we move the focus to the first window that can get it.
-
- // VZ: no, we set the focus to the last window too. I don't understand why
- // should we make this distinction: if an app wants to set focus to
- // some precise control, it may always do it directly, but if we don't
- // use m_winLastFocused here, the focus won't be set correctly after a
- // notebook page change nor after frame activation under MSW (it calls
- // SetFocus too)
- //
- // RR: yes, when I the tab key to navigate in a panel with some controls and
- // a notebook and the focus jumps to the notebook (typically coming from
- // a button at the top) the notebook should focus the first child in the
- // current notebook page, not the last one which would otherwise get the
- // focus if you used the tab key to navigate from the current notebook
- // page to button at the bottom. See every page in the controls sample.
- //
- // VZ: ok, but this still doesn't (at least I don't see how it can) take
- // care of first/last child problem: i.e. if Shift-TAB is pressed in a
- // situation like above, the focus should be given to the last child,
- // not the first one (and not to the last focused one neither) - I
- // think my addition to OnNavigationKey() above takes care of it.
- // Keeping #ifdef __WXGTK__ for now, but please try removing it and see
- // what happens.
- //
- // RR: Removed for now. Let's see what happens..
-
- if ( !SetFocusToChild() )
+ if (m_inSetFocus)
+ return true;
+
+ // when the panel gets the focus we move the focus to either the last
+ // window that had the focus or the first one that can get it unless the
+ // focus had been already set to some other child
+
+ wxWindow *win = wxWindow::FindFocus();
+ while ( win )
{
- m_winParent->SetFocus();
+ if ( win == m_winParent )
+ {
+ // our child already has focus, don't take it away from it
+ return true;
+ }
+
+ if ( win->IsTopLevel() )
+ {
+ // don't look beyond the first top level parent - useless and
+ // unnecessary
+ break;
+ }
+
+ win = win->GetParent();
}
+
+ // protect against infinite recursion:
+ m_inSetFocus = true;
+
+ bool ret = SetFocusToChild();
+
+ m_inSetFocus = false;
+
+ return ret;
}
void wxControlContainer::HandleOnFocus(wxFocusEvent& event)
{
- wxLogTrace(_T("focus"), _T("OnFocus on wxPanel 0x%08x, name: %s"),
+ wxLogTrace(TRACE_FOCUS, _T("OnFocus on wxPanel 0x%p, name: %s"),
m_winParent->GetHandle(),
m_winParent->GetName().c_str() );
- // If we panel got the focus *by way of getting clicked on*
- // we move the focus to either the last window that had the
- // focus or the first one that can get it.
- (void)SetFocusToChild();
+ DoSetFocus();
event.Skip();
}
bool wxSetFocusToChild(wxWindow *win, wxWindow **childLastFocused)
{
- wxCHECK_MSG( win, FALSE, _T("wxSetFocusToChild(): invalid window") );
+ wxCHECK_MSG( win, false, _T("wxSetFocusToChild(): invalid window") );
+ wxCHECK_MSG( childLastFocused, false,
+ _T("wxSetFocusToChild(): NULL child poonter") );
if ( *childLastFocused )
{
- // It might happen that the window got reparented or no longer accepts
- // the focus.
- if ( (*childLastFocused)->GetParent() == win &&
- (*childLastFocused)->AcceptsFocusFromKeyboard() )
+ // It might happen that the window got reparented
+ if ( (*childLastFocused)->GetParent() == win )
{
- wxLogTrace(_T("focus"),
- _T("SetFocusToChild() => last child (0x%08x)."),
+ wxLogTrace(TRACE_FOCUS,
+ _T("SetFocusToChild() => last child (0x%p)."),
(*childLastFocused)->GetHandle());
+ // not SetFocusFromKbd(): we're restoring focus back to the old
+ // window and not setting it as the result of a kbd action
(*childLastFocused)->SetFocus();
- return TRUE;
+ return true;
}
else
{
}
// set the focus to the first child who wants it
- wxWindowList::Node *node = win->GetChildren().GetFirst();
+ wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
while ( node )
{
wxWindow *child = node->GetData();
+ node = node->GetNext();
+#ifdef __WXMAC__
+ if ( child->GetParent()->MacIsWindowScrollbar( child ) )
+ continue;
+#endif
+
if ( child->AcceptsFocusFromKeyboard() && !child->IsTopLevel() )
{
- wxLogTrace(_T("focus"),
- _T("SetFocusToChild() => first child (0x%08x)."),
+#ifdef __WXMSW__
+ // If a radiobutton is the first focusable child, search for the
+ // selected radiobutton in the same group
+ wxRadioButton* btn = wxDynamicCast(child, wxRadioButton);
+ if (btn)
+ {
+ wxRadioButton* selected = wxGetSelectedButtonInGroup(btn);
+ if (selected)
+ child = selected;
+ }
+#endif
+
+ wxLogTrace(TRACE_FOCUS,
+ _T("SetFocusToChild() => first child (0x%p)."),
child->GetHandle());
- *childLastFocused = child; // should be redundant, but it is not
- child->SetFocus();
- return TRUE;
+ *childLastFocused = child;
+ child->SetFocusFromKbd();
+ return true;
}
-
- node = node->GetNext();
}
- return FALSE;
+ return false;
}
projects / wxWidgets.git / blobdiff