X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/341c92a8b4c813cbfb606687937dcdf5d8c3c2fe..5438a5665e35ee6286c5af73747873df9daed252:/src/generic/panelg.cpp diff --git a/src/generic/panelg.cpp b/src/generic/panelg.cpp index 9f3813167a..73a7a04cf3 100644 --- a/src/generic/panelg.cpp +++ b/src/generic/panelg.cpp @@ -1,48 +1,70 @@ ///////////////////////////////////////////////////////////////////////////// -// 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: $Id$ // Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// 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_SYS_COLOUR_CHANGED(wxPanel::OnSysColourChanged) EVT_SET_FOCUS(wxPanel::OnFocus) EVT_NAVIGATION_KEY(wxPanel::OnNavigationKey) + EVT_SIZE(wxPanel::OnSize) END_EVENT_TABLE() -#endif +// ============================================================================ +// implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxPanel creation +// ---------------------------------------------------------------------------- -wxPanel::wxPanel() +void wxPanel::Init() { - m_lastFocus = NULL; + m_winLastFocused = (wxWindow *)NULL; +#if wxUSE_BUTTON + m_btnDefault = (wxButton *)NULL; +#endif // wxUSE_BUTTON } bool wxPanel::Create(wxWindow *parent, wxWindowID id, @@ -51,22 +73,14 @@ bool wxPanel::Create(wxWindow *parent, wxWindowID id, long style, const wxString& name) { - m_lastFocus = NULL; - - 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); @@ -83,77 +97,185 @@ void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event) 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) - { - event.Skip(); - return; - } + // the event is propagated downwards if the event emitter was our parent + bool goingDown = event.GetEventObject() == GetParent(); + + const wxWindowList& children = GetChildren(); - // don't process these ones here - if (event.IsWindowChange()) + // 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; } - wxWindow *winFocus = event.GetCurrentFocus(); - if (!winFocus) - winFocus = wxWindow::FindFocus(); + // where are we going? + bool forward = event.GetDirection(); - if (!winFocus) + // 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 + + // the event emitter might have done this for us + wxWindow *winFocus = event.GetCurrentFocus(); + + // but if not, we might know where the focus was ourselves + if (!winFocus) + winFocus = m_winLastFocused; + + // if still no luck, do it the hard way + if (!winFocus) + winFocus = wxWindow::FindFocus(); + + if ( winFocus ) + { + // 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 ) + { + // 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 ); + } - wxNode *start_node = GetChildren().Find( winFocus ); - if (!start_node) - start_node = GetChildren().First(); + // if we still didn't find anything, we should start with the first one + if ( !start_node ) + { + start_node = children.GetFirst(); + } - wxNode *node = event.GetDirection() ? start_node->Next() - : start_node->Previous(); + // 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(); + } - while (node != start_node) + // we want to cycle over all elements passing by NULL + while ( node != start_node ) { - if (!node) + // Have we come to the last or first item on the panel? + if ( !node ) { -//#if 0 // FIXME seems to enter in an infinite loop - how is this possible? - // we arrived at the last/first of our children - but may be this - // panel is inside another panel, so make focus go to the next/prev - // control in the parent (if we have one) - if (GetParent() != NULL) + if ( !goingDown ) { - wxNavigationKeyEvent new_event; - new_event.SetDirection( event.GetDirection() ); - new_event.SetWindowChange(FALSE); - new_event.SetCurrentFocus( this ); - - if (GetParent()->GetEventHandler()->ProcessEvent(new_event)) + // 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() ) { - return; + // 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; } } -//#endif // 0 + //else: as the focus came from our parent, we definitely don't want + // to send it back to it! - node = event.GetDirection() ? GetChildren().First() - : GetChildren().Last(); + // no, we are not inside another panel so process this ourself + node = forward ? children.GetFirst() : children.GetLast(); continue; } - wxWindow *child = (wxWindow *)node->Data(); + wxWindow *child = node->GetData(); - if (child->AcceptsFocus()) + if ( child->AcceptsFocusFromKeyboard() ) { - // ok, event processed - child->SetFocus(); + m_winLastFocused = child; // should be redundant, but it is not + + // 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->Next() : node->Previous(); + node = forward ? node->GetNext() : node->GetPrevious(); } // we cycled through all of our children and none of them wanted to accept @@ -161,10 +283,116 @@ void wxPanel::OnNavigationKey( wxNavigationKeyEvent& event ) event.Skip(); } +void wxPanel::RemoveChild(wxWindowBase *child) +{ + if ( child == m_winLastFocused ) + m_winLastFocused = NULL; + wxWindow::RemoveChild(child); +} + +void wxPanel::SetFocus() +{ + wxLogTrace(_T("focus"), _T("SetFocus on wxPanel 0x%08x."), 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() ) + { + wxWindow::SetFocus(); + } +} + void wxPanel::OnFocus(wxFocusEvent& event) { - if ( m_lastFocus ) - m_lastFocus->SetFocus(); - else - event.Skip(); + 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 the focus to either the last window that had the + // focus or the first one that can get it. + (void)SetFocusToChild(); + + event.Skip(); +} + +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 or no longer accepts + // the focus. + if ( (*childLastFocused)->GetParent() == win && + (*childLastFocused)->AcceptsFocusFromKeyboard() ) + { + 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; + } + } + + // set the focus to the first child who wants it + wxWindowList::Node *node = win->GetChildren().GetFirst(); + while ( node ) + { + wxWindow *child = node->GetData(); + + if ( child->AcceptsFocusFromKeyboard() && !child->IsTopLevel() ) + { + wxLogTrace(_T("focus"), + _T("SetFocusToChild() => first child (0x%08x)."), + child->GetHandle()); + + *childLastFocused = child; // should be redundant, but it is not + child->SetFocus(); + return TRUE; + } + + node = node->GetNext(); + } + + return FALSE; }