/////////////////////////////////////////////////////////////////////////////
-// Name: panelg.cpp
-// Purpose: wxPanel
-// Author: Julian Smart
+// Name: src/generic/panelg.cpp
+// Purpose: wxPanel and the keyboard handling code
+// Author: Julian Smart, Robert Roebling, Vadim Zeitlin
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
-#pragma implementation "panelg.h"
+ #pragma implementation "panelg.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-#pragma hdrstop
+ #pragma hdrstop
#endif
#ifndef WX_PRECOMP
-#include "wx/object.h"
-#include "wx/font.h"
-#include "wx/colour.h"
-#include "wx/settings.h"
+ #include "wx/object.h"
+ #include "wx/font.h"
+ #include "wx/colour.h"
+ #include "wx/settings.h"
+ #include "wx/log.h"
#endif
#include "wx/generic/panelg.h"
-#if !USE_SHARED_LIBRARY
+// ----------------------------------------------------------------------------
+// wxWin macros
+// ----------------------------------------------------------------------------
+
IMPLEMENT_DYNAMIC_CLASS(wxPanel, wxWindow)
BEGIN_EVENT_TABLE(wxPanel, wxWindow)
EVT_SIZE(wxPanel::OnSize)
END_EVENT_TABLE()
-#endif
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxPanel creation
+// ----------------------------------------------------------------------------
void wxPanel::Init()
{
m_winLastFocused = (wxWindow *)NULL;
+#if wxUSE_BUTTON
m_btnDefault = (wxButton *)NULL;
+#endif // wxUSE_BUTTON
}
bool wxPanel::Create(wxWindow *parent, wxWindowID id,
long style,
const wxString& name)
{
- bool ret = wxWindow::Create(parent, id, pos, size, style, name);
-
- if ( ret )
- {
-#ifndef __WXGTK__
- SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
- SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
-#endif
- }
-
- return ret;
+ return wxWindow::Create(parent, id, pos, size, style, name);
}
-void wxPanel::InitDialog(void)
+// ----------------------------------------------------------------------------
+// misc
+// ----------------------------------------------------------------------------
+
+void wxPanel::InitDialog()
{
wxInitDialogEvent event(GetId());
event.SetEventObject(this);
wxWindow::OnSysColourChanged(event);
}
+void wxPanel::OnSize(wxSizeEvent& WXUNUSED(event))
+{
+#if wxUSE_CONSTRAINTS
+ if (GetAutoLayout())
+ Layout();
+#endif
+}
+
+// ----------------------------------------------------------------------------
+// Keyboard handling - this is the place where the TAB traversal logic is
+// implemented. As this code is common to all ports, this ensures consistent
+// behaviour even if we don't specify how exactly the wxNavigationKeyEvent are
+// generated and this is done in platform specific code which also ensures that
+// we can follow the given platform standards.
+// ----------------------------------------------------------------------------
+
void wxPanel::OnNavigationKey( wxNavigationKeyEvent& event )
{
- // there is not much to do if we have only one child (or not at all)
- if (GetChildren().GetCount() < 2)
+ // the event is propagated downwards if the event emitter was our parent
+ bool goingDown = event.GetEventObject() == GetParent();
+
+ const wxWindowList& children = GetChildren();
+
+ // 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() )
{
- event.Skip();
+ // let the parent process it unless it already comes from our parent
+ // of we don't have any
+ wxWindow *parent = GetParent();
+ if ( goingDown ||
+ !parent || !parent->GetEventHandler()->ProcessEvent(event) )
+ {
+ event.Skip();
+ }
+
return;
}
- // don't process these ones here
- if (event.IsWindowChange())
+ // where are we going?
+ 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;
+
+ // 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
+ // for our parent we look like a single control
+ if ( goingDown )
{
- event.Skip();
- return;
+ // just to be sure it's not used (normally this is not necessary, but
+ // doesn't hurt neither)
+ m_winLastFocused = (wxWindow *)NULL;
+
+ // 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
+ {
+ // try to find the child which has the focus currently
- // Did the event emitter tell us where the last focus was?
- // wxGTK does this in wxWindow, but wxMSW does not. It is
- // also done in wxPanel if the event is propagated up.
+ // the event emitter might have done this for us
wxWindow *winFocus = event.GetCurrentFocus();
- // Do we know where the focus was ourselves, then?
- if (!winFocus)
- winFocus = m_winLastFocused;
+ // but if not, we might know where the focus was ourselves
+ if (!winFocus)
+ winFocus = m_winLastFocused;
- if (!winFocus)
- winFocus = wxWindow::FindFocus();
+ // if still no luck, do it the hard way
+ if (!winFocus)
+ winFocus = wxWindow::FindFocus();
- if (!winFocus)
- {
- event.Skip();
- return;
- }
+ if ( winFocus )
+ {
+ // ok, we found the focus - now is it our child?
+ start_node = children.Find( winFocus );
+ }
+ else
+ {
+ start_node = (wxWindowList::Node *)NULL;
+ }
- wxWindowList::Node *start_node = GetChildren().Find( winFocus );
- if ( !start_node )
- start_node = GetChildren().Find( m_winLastFocused );
- if ( !start_node )
- start_node = GetChildren().GetFirst();
+ if ( !start_node && m_winLastFocused )
+ {
+ // window which has focus isn't our child, fall back to the one
+ // which had the focus the last time
+ start_node = children.Find( m_winLastFocused );
+ }
- wxWindowList::Node *node = event.GetDirection() ? start_node->GetNext()
- : start_node->GetPrevious();
+ // if we still didn't find anything, we should start with the first one
+ if ( !start_node )
+ {
+ start_node = children.GetFirst();
+ }
+
+ // and the first child which we can try setting focus to is the next or
+ // the previous one
+ node = forward ? start_node->GetNext() : start_node->GetPrevious();
+ }
+ // we want to cycle over all elements passing by NULL
while ( node != start_node )
{
// Have we come to the last or first item on the panel?
if ( !node )
{
- // Check if our (may be 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 the next/previous
- // item after this panel in the parent panel).
- wxWindow *focussed_child_of_parent = this;
- for ( wxWindow *parent = GetParent(); parent; parent = parent->GetParent() )
+ if ( !goingDown )
{
- // we don't want to tab into a different dialog or frame
- if ( focussed_child_of_parent->IsTopLevel() )
- break;
-
- // is the parent a panel?
- wxPanel *panel = wxDynamicCast(parent, wxPanel);
- if (panel)
+ // Check if our (may be 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
+ // the next/previous item after this panel in the parent
+ // panel).
+ wxWindow *focussed_child_of_parent = this;
+ for ( wxWindow *parent = GetParent();
+ parent;
+ parent = parent->GetParent() )
{
+ // we don't want to tab into a different dialog or frame
+ if ( focussed_child_of_parent->IsTopLevel() )
+ break;
+
event.SetCurrentFocus( focussed_child_of_parent );
if (parent->GetEventHandler()->ProcessEvent( event ))
return;
- }
- focussed_child_of_parent = parent;
+ focussed_child_of_parent = parent;
+ }
}
+ //else: as the focus came from our parent, we definitely don't want
+ // to send it back to it!
// no, we are not inside another panel so process this ourself
- node = event.GetDirection() ? GetChildren().GetFirst()
- : GetChildren().GetLast();
+ node = forward ? children.GetFirst() : children.GetLast();
continue;
}
wxWindow *child = node->GetData();
- if ( child->AcceptsFocus() )
+ if ( child->AcceptsFocusFromKeyboard() )
{
m_winLastFocused = child; // should be redundant, but it is not
- child->SetFocus();
+
+ // if we're setting the focus to a child panel we should prevent it
+ // from giving it to the child which had the focus the last time
+ // and instead give it to the first/last child depending from which
+ // direction we're coming
+ wxPanel *subpanel = wxDynamicCast(child, wxPanel);
+ if ( subpanel )
+ {
+ // trick the panel into thinking that it got the navigation
+ // event - instead of duplicating all the code here
+ //
+ // make sure that we do trick it by setting all the parameters
+ // correctly (consistently with the code in this very function
+ // above) and that it starts from the very beginning/end by
+ // using SetLastFocus(NULL)
+ subpanel->SetLastFocus((wxWindow *)NULL);
+ }
+
+ event.SetEventObject(this);
+ if ( !child->GetEventHandler()->ProcessEvent(event) )
+ {
+ // everything is simple: just give focus to it
+ child->SetFocus();
+ }
+ //else: the child manages its focus itself
+
+ event.Skip( FALSE );
return;
}
- node = event.GetDirection() ? node->GetNext() : node->GetPrevious();
+ node = forward ? node->GetNext() : node->GetPrevious();
}
// we cycled through all of our children and none of them wanted to accept
event.Skip();
}
-
-void wxPanel::OnSize(wxSizeEvent& WXUNUSED(event))
+void wxPanel::RemoveChild(wxWindowBase *child)
{
-#if wxUSE_CONSTRAINTS
- if (GetAutoLayout()) Layout();
-#endif
+ if ( child == m_winLastFocused )
+ m_winLastFocused = NULL;
+ wxWindow::RemoveChild(child);
}
void wxPanel::SetFocus()
{
- // If the panel gets the focus *by way of getting it set directly*
- // we move it to the first window that can get it.
+ wxLogTrace(_T("focus"), _T("SetFocus on wxPanel 0x%08x."), GetHandle());
- wxNode *node = GetChildren().First();
- while (node)
+ // 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() )
{
- wxWindow *child = (wxWindow*) node->Data();
- if (child->AcceptsFocus())
- {
- m_winLastFocused = child; // should be redundant, but it is not
- child->SetFocus();
- return;
- }
- node = node->Next();
+ wxWindow::SetFocus();
}
-
- m_winLastFocused = (wxWindow*) NULL;
-
- wxWindow::SetFocus();
}
void wxPanel::OnFocus(wxFocusEvent& event)
{
+ wxLogTrace(_T("focus"), _T("OnFocus on wxPanel 0x%08x, name: %s"), GetHandle(), GetName().c_str() );
+
// If the panel gets the focus *by way of getting clicked on*
- // we move it to either the last window that had the focus or
- // the first one that can get it.
+ // we move the focus to either the last window that had the
+ // focus or the first one that can get it.
+ (void)SetFocusToChild();
+
+ event.Skip();
+}
- if (m_winLastFocused)
+bool wxPanel::SetFocusToChild()
+{
+ return wxSetFocusToChild(this, &m_winLastFocused);
+}
+
+// ----------------------------------------------------------------------------
+// SetFocusToChild(): this function is used by wxPanel but also by wxFrame in
+// wxMSW, this is why it is outside of wxPanel class
+// ----------------------------------------------------------------------------
+
+bool wxSetFocusToChild(wxWindow *win, wxWindow **childLastFocused)
+{
+ wxCHECK_MSG( win, FALSE, _T("wxSetFocusToChild(): invalid window") );
+
+ if ( *childLastFocused )
{
- // it might happen that the window got reparented...
- if ( m_winLastFocused->GetParent() == this )
+ // It might happen that the window got reparented or no longer accepts
+ // the focus.
+ if ( (*childLastFocused)->GetParent() == win &&
+ (*childLastFocused)->AcceptsFocusFromKeyboard() )
{
- m_winLastFocused->SetFocus();
- return;
+ wxLogTrace(_T("focus"),
+ _T("SetFocusToChild() => last child (0x%08x)."),
+ (*childLastFocused)->GetHandle());
+
+ (*childLastFocused)->SetFocus();
+ return TRUE;
+ }
+ else
+ {
+ // it doesn't count as such any more
+ *childLastFocused = (wxWindow *)NULL;
}
}
- wxNode *node = GetChildren().First();
- while (node)
+ // set the focus to the first child who wants it
+ wxWindowList::Node *node = win->GetChildren().GetFirst();
+ while ( node )
{
- wxWindow *child = (wxWindow*) node->Data();
- if (child->AcceptsFocus())
+ wxWindow *child = node->GetData();
+
+ if ( child->AcceptsFocusFromKeyboard() && !child->IsTopLevel() )
{
- m_winLastFocused = child; // should be redundant, but it is not
+ wxLogTrace(_T("focus"),
+ _T("SetFocusToChild() => first child (0x%08x)."),
+ child->GetHandle());
+
+ *childLastFocused = child; // should be redundant, but it is not
child->SetFocus();
- return;
+ return TRUE;
}
- node = node->Next();
- }
- m_winLastFocused = (wxWindow*) NULL;
+ node = node->GetNext();
+ }
- event.Skip();
+ return FALSE;
}
projects / wxWidgets.git / blobdiff