X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/86bb7d48256bbca4b3e09c05125c3b6333a506ef..cbf656555e872684a74eb0badffe1aa33bedf95d:/src/generic/panelg.cpp diff --git a/src/generic/panelg.cpp b/src/generic/panelg.cpp index c58841ba5c..73a7a04cf3 100644 --- a/src/generic/panelg.cpp +++ b/src/generic/panelg.cpp @@ -1,43 +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/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_winLastFocused = (wxWindow *)NULL; +#if wxUSE_BUTTON + m_btnDefault = (wxButton *)NULL; +#endif // wxUSE_BUTTON } bool wxPanel::Create(wxWindow *parent, wxWindowID id, @@ -46,130 +73,326 @@ bool wxPanel::Create(wxWindow *parent, wxWindowID id, long style, const wxString& name) { - bool ret = wxWindow::Create(parent, id, pos, size, style, name); - - if ( ret ) { - SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); - } - - return ret; + return wxWindow::Create(parent, id, pos, size, style, name); } -void wxPanel::InitDialog(void) -{ - wxInitDialogEvent event(GetId()); - event.SetEventObject(this); - GetEventHandler()->ProcessEvent(event); -} +// ---------------------------------------------------------------------------- +// misc +// ---------------------------------------------------------------------------- -void wxPanel::SetFocus() +void wxPanel::InitDialog() { - SetFocusToNextChild(); + wxInitDialogEvent event(GetId()); + event.SetEventObject(this); + GetEventHandler()->ProcessEvent(event); } // Responds to colour changes, and passes event on to children. void wxPanel::OnSysColourChanged(wxSysColourChangedEvent& event) { SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetDefaultBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); Refresh(); // Propagate the event to the non-top-level children wxWindow::OnSysColourChanged(event); } -void wxPanel::OnNavigationKey(wxNavigationKeyEvent& event) +void wxPanel::OnSize(wxSizeEvent& WXUNUSED(event)) { - // don't process these ones here - if ( event.IsWindowChange() ) { - event.Skip(); - return; - } - - // first of all, find the window which currently has the focus - wxNode *node = GetChildren()->First(); - wxWindow *winFocus = event.GetCurrentFocus(); - - // @@@ no FindFocus() in wxGTK - #ifndef __WXGTK__ - if ( winFocus == NULL ) - winFocus = wxWindow::FindFocus(); - #endif - - while ( node != NULL ) { - if ( node->Data() == winFocus ) - break; - - node = node->Next(); - } - - if ( !SetFocusToNextChild(node, event.GetDirection()) ) +#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 ) +{ + // 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() ) + { + // 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; + } + + // 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 ) + { + // 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 ); + } + + // 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 ) + { + if ( !goingDown ) + { + // 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; + } + } + //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 = forward ? children.GetFirst() : children.GetLast(); + + continue; + } + + wxWindow *child = node->GetData(); + + if ( child->AcceptsFocusFromKeyboard() ) + { + 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 = forward ? node->GetNext() : node->GetPrevious(); + } + + // we cycled through all of our children and none of them wanted to accept + // focus event.Skip(); } -// set focus to the next child which accepts it (or first/last if node == NULL) -bool wxPanel::SetFocusToNextChild(wxNode *node, bool bForward) +void wxPanel::RemoveChild(wxWindowBase *child) +{ + if ( child == m_winLastFocused ) + m_winLastFocused = NULL; + wxWindow::RemoveChild(child); +} + +void wxPanel::SetFocus() { - // @@ using typed list would be better... - #define WIN(node) ((wxWindow *)(node->Data())) - - bool bFound = FALSE; // have we found a window we will set focus to? - - wxList *children = GetChildren(); - if ( node == NULL ) { - // we've never had focus before - node = bForward ? children->First() : children->Last(); - if ( node == NULL ) { - // no children - return FALSE; + 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) +{ + wxLogTrace(_T("focus"), _T("OnFocus on wxPanel 0x%08x, name: %s"), GetHandle(), GetName().c_str() ); - bFound = WIN(node)->AcceptsFocus(); - } -#if 0 // to restore when it will really work (now it's triggered all the time) - else { - // just to be sure it's the right one - wxASSERT( WIN(node)->AcceptsFocus() ); - } -#endif // 0 - - // find the next child which accepts focus - bool bParentWantsIt = TRUE; - while ( !bFound ) { - node = bForward ? node->Next() : node->Previous(); - if ( node == NULL ) { - if ( !bParentWantsIt ) { - // we've already been here which means that we've done a whole - // cycle without success - get out from the infinite loop - return FALSE; - } - - // ask parent if he doesn't want to advance focus to the next panel - if ( GetParent() != NULL ) { - wxNavigationKeyEvent event; - event.SetDirection(bForward); - event.SetWindowChange(FALSE); - event.SetCurrentFocus(this); - - if ( GetParent()->ProcessEvent(event) ) - return TRUE; - } - - // a sentinel to avoid infinite loops - bParentWantsIt = FALSE; - - // wrap around - node = bForward ? children->First() : children->Last(); + // 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; + } } - bFound = WIN(node)->AcceptsFocus(); - } + // set the focus to the first child who wants it + wxWindowList::Node *node = win->GetChildren().GetFirst(); + while ( node ) + { + wxWindow *child = node->GetData(); - WIN(node)->SetFocus(); + if ( child->AcceptsFocusFromKeyboard() && !child->IsTopLevel() ) + { + wxLogTrace(_T("focus"), + _T("SetFocusToChild() => first child (0x%08x)."), + child->GetHandle()); - #undef WIN + *childLastFocused = child; // should be redundant, but it is not + child->SetFocus(); + return TRUE; + } + + node = node->GetNext(); + } - return TRUE; + return FALSE; }