///////////////////////////////////////////////////////////////////////////// // Name: src/msw/radiobut.cpp // Purpose: wxRadioButton // Author: Julian Smart // Modified by: // Created: 04/01/98 // Copyright: (c) Julian Smart // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ // declarations // ============================================================================ // ---------------------------------------------------------------------------- // headers // ---------------------------------------------------------------------------- // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #if wxUSE_RADIOBTN #include "wx/radiobut.h" #ifndef WX_PRECOMP #include "wx/settings.h" #include "wx/dcscreen.h" #include "wx/toplevel.h" #endif #include "wx/msw/private.h" // ============================================================================ // wxRadioButton implementation // ============================================================================ // ---------------------------------------------------------------------------- // wxRadioButton creation // ---------------------------------------------------------------------------- void wxRadioButton::Init() { m_isChecked = false; } bool wxRadioButton::Create(wxWindow *parent, wxWindowID id, const wxString& label, const wxPoint& pos, const wxSize& size, long style, const wxValidator& validator, const wxString& name) { if ( !CreateControl(parent, id, pos, size, style, validator, name) ) return false; WXDWORD exstyle = 0; WXDWORD msStyle = MSWGetStyle(style, &exstyle); if ( !MSWCreateControl(wxT("BUTTON"), msStyle, pos, size, label, exstyle) ) return false; // for compatibility with wxGTK, the first radio button in a group is // always checked (this makes sense anyhow as you need to ensure that at // least one button in the group is checked and this is the simplest way to // do it) if ( HasFlag(wxRB_GROUP) ) SetValue(true); return true; } // ---------------------------------------------------------------------------- // wxRadioButton functions // ---------------------------------------------------------------------------- void wxRadioButton::SetValue(bool value) { ::SendMessage(GetHwnd(), BM_SETCHECK, value ? BST_CHECKED : BST_UNCHECKED, 0); m_isChecked = value; if ( !value ) return; // if we set the value of one radio button we also must clear all the other // buttons in the same group: Windows doesn't do it automatically // // moreover, if another radiobutton in the group currently has the focus, // we have to set it to this radiobutton, else the old radiobutton will be // reselected automatically, if a parent window loses the focus and regains // it. wxWindow * const focus = FindFocus(); wxTopLevelWindow * const tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow); wxCHECK_RET( tlw, wxT("radio button outside of TLW?") ); wxWindow * const focusInTLW = tlw->GetLastFocus(); const wxWindowList& siblings = GetParent()->GetChildren(); wxWindowList::compatibility_iterator nodeThis = siblings.Find(this); wxCHECK_RET( nodeThis, wxT("radio button not a child of its parent?") ); // this will be set to true in the code below if the focus is in our TLW // and belongs to one of the other buttons in the same group bool shouldSetFocus = false; // this will be set to true if the focus is outside of our TLW currently // but the remembered focus of this TLW is one of the other buttons in the // same group bool shouldSetTLWFocus = false; // if it's not the first item of the group ... if ( !HasFlag(wxRB_GROUP) ) { // ... turn off all radio buttons before it for ( wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious(); nodeBefore; nodeBefore = nodeBefore->GetPrevious() ) { wxRadioButton *btn = wxDynamicCast(nodeBefore->GetData(), wxRadioButton); if ( !btn ) { // don't stop on non radio buttons, we could have intermixed // buttons and e.g. static labels continue; } if ( btn->HasFlag(wxRB_SINGLE) ) { // A wxRB_SINGLE button isn't part of this group break; } if ( btn == focus ) shouldSetFocus = true; else if ( btn == focusInTLW ) shouldSetTLWFocus = true; btn->SetValue(false); if ( btn->HasFlag(wxRB_GROUP) ) { // even if there are other radio buttons before this one, // they're not in the same group with us break; } } } // ... and also turn off all buttons after this one for ( wxWindowList::compatibility_iterator nodeAfter = nodeThis->GetNext(); nodeAfter; nodeAfter = nodeAfter->GetNext() ) { wxRadioButton *btn = wxDynamicCast(nodeAfter->GetData(), wxRadioButton); if ( !btn ) continue; if ( btn->HasFlag(wxRB_GROUP | wxRB_SINGLE) ) { // no more buttons or the first button of the next group break; } if ( btn == focus ) shouldSetFocus = true; else if ( btn == focusInTLW ) shouldSetTLWFocus = true; btn->SetValue(false); } if ( shouldSetFocus ) SetFocus(); else if ( shouldSetTLWFocus ) tlw->SetLastFocus(this); } bool wxRadioButton::GetValue() const { wxASSERT_MSG( m_isChecked == (::SendMessage(GetHwnd(), BM_GETCHECK, 0, 0L) != 0), wxT("wxRadioButton::m_isChecked is out of sync?") ); return m_isChecked; } // ---------------------------------------------------------------------------- // wxRadioButton event processing // ---------------------------------------------------------------------------- void wxRadioButton::Command (wxCommandEvent& event) { SetValue(event.GetInt() != 0); ProcessCommand(event); } bool wxRadioButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) { if ( param != BN_CLICKED ) return false; if ( !m_isChecked ) { // we need to manually update the button state as we use BS_RADIOBUTTON // and not BS_AUTORADIOBUTTON SetValue(true); wxCommandEvent event(wxEVT_RADIOBUTTON, GetId()); event.SetEventObject( this ); event.SetInt(true); // always checked ProcessCommand(event); } return true; } // ---------------------------------------------------------------------------- // wxRadioButton geometry // ---------------------------------------------------------------------------- wxSize wxRadioButton::DoGetBestSize() const { static int s_radioSize = 0; if ( !s_radioSize ) { wxScreenDC dc; dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT)); s_radioSize = dc.GetCharHeight(); // radio button bitmap size under CE is bigger than the font height, // adding just one pixel seems to work fine for the default font but it // would be nice to find some better way to find the correct height #ifdef __WXWINCE__ s_radioSize++; #endif // __WXWINCE__ } wxString str = GetLabel(); int wRadio, hRadio; if ( !str.empty() ) { GetTextExtent(GetLabelText(str), &wRadio, &hRadio); wRadio += s_radioSize + GetCharWidth(); if ( hRadio < s_radioSize ) hRadio = s_radioSize; } else { wRadio = s_radioSize; hRadio = s_radioSize; } wxSize best(wRadio, hRadio); CacheBestSize(best); return best; } WXDWORD wxRadioButton::MSWGetStyle(long style, WXDWORD *exstyle) const { WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle); if ( HasFlag(wxRB_GROUP) ) msStyle |= WS_GROUP; // we use BS_RADIOBUTTON and not BS_AUTORADIOBUTTON because the use of the // latter can easily result in the application entering an infinite loop // inside IsDialogMessage() // // we used to use BS_RADIOBUTTON only for wxRB_SINGLE buttons but there // doesn't seem to be any harm to always use it and it prevents some hangs, // see #9786 msStyle |= BS_RADIOBUTTON; if ( style & wxCLIP_SIBLINGS ) msStyle |= WS_CLIPSIBLINGS; if ( style & wxALIGN_RIGHT ) msStyle |= BS_LEFTTEXT | BS_RIGHT; return msStyle; } #endif // wxUSE_RADIOBTN