3f66f6a5b3
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300 lines
9.0 KiB
C++
300 lines
9.0 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: src/msw/radiobut.cpp
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// Purpose: wxRadioButton
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// Author: Julian Smart
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// Modified by:
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// Created: 04/01/98
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// Copyright: (c) Julian Smart
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_RADIOBTN
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#include "wx/radiobut.h"
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#ifndef WX_PRECOMP
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#include "wx/settings.h"
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#include "wx/dcscreen.h"
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#include "wx/toplevel.h"
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#endif
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#include "wx/msw/private.h"
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// ============================================================================
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// wxRadioButton implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// wxRadioButton creation
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// ----------------------------------------------------------------------------
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void wxRadioButton::Init()
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{
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m_isChecked = false;
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}
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bool wxRadioButton::Create(wxWindow *parent,
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wxWindowID id,
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const wxString& label,
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const wxPoint& pos,
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const wxSize& size,
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long style,
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const wxValidator& validator,
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const wxString& name)
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{
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if ( !CreateControl(parent, id, pos, size, style, validator, name) )
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return false;
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WXDWORD exstyle = 0;
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WXDWORD msStyle = MSWGetStyle(style, &exstyle);
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if ( !MSWCreateControl(wxT("BUTTON"), msStyle, pos, size, label, exstyle) )
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return false;
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// for compatibility with wxGTK, the first radio button in a group is
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// always checked (this makes sense anyhow as you need to ensure that at
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// least one button in the group is checked and this is the simplest way to
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// do it)
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if ( HasFlag(wxRB_GROUP) )
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SetValue(true);
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return true;
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}
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// ----------------------------------------------------------------------------
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// wxRadioButton functions
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// ----------------------------------------------------------------------------
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void wxRadioButton::SetValue(bool value)
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{
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::SendMessage(GetHwnd(), BM_SETCHECK,
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value ? BST_CHECKED : BST_UNCHECKED, 0);
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m_isChecked = value;
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if ( !value )
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return;
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// if we set the value of one radio button we also must clear all the other
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// buttons in the same group: Windows doesn't do it automatically
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//
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// moreover, if another radiobutton in the group currently has the focus,
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// we have to set it to this radiobutton, else the old radiobutton will be
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// reselected automatically, if a parent window loses the focus and regains
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// it.
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wxWindow * const focus = FindFocus();
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wxTopLevelWindow * const
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tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
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wxCHECK_RET( tlw, wxT("radio button outside of TLW?") );
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wxWindow * const focusInTLW = tlw->GetLastFocus();
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const wxWindowList& siblings = GetParent()->GetChildren();
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wxWindowList::compatibility_iterator nodeThis = siblings.Find(this);
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wxCHECK_RET( nodeThis, wxT("radio button not a child of its parent?") );
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// this will be set to true in the code below if the focus is in our TLW
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// and belongs to one of the other buttons in the same group
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bool shouldSetFocus = false;
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// this will be set to true if the focus is outside of our TLW currently
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// but the remembered focus of this TLW is one of the other buttons in the
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// same group
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bool shouldSetTLWFocus = false;
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// if it's not the first item of the group ...
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if ( !HasFlag(wxRB_GROUP) )
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{
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// ... turn off all radio buttons before it
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for ( wxWindowList::compatibility_iterator nodeBefore = nodeThis->GetPrevious();
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nodeBefore;
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nodeBefore = nodeBefore->GetPrevious() )
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{
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wxRadioButton *btn = wxDynamicCast(nodeBefore->GetData(),
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wxRadioButton);
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if ( !btn )
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{
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// don't stop on non radio buttons, we could have intermixed
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// buttons and e.g. static labels
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continue;
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}
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if ( btn->HasFlag(wxRB_SINGLE) )
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{
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// A wxRB_SINGLE button isn't part of this group
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break;
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}
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if ( btn == focus )
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shouldSetFocus = true;
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else if ( btn == focusInTLW )
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shouldSetTLWFocus = true;
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btn->SetValue(false);
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if ( btn->HasFlag(wxRB_GROUP) )
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{
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// even if there are other radio buttons before this one,
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// they're not in the same group with us
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break;
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}
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}
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}
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// ... and also turn off all buttons after this one
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for ( wxWindowList::compatibility_iterator nodeAfter = nodeThis->GetNext();
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nodeAfter;
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nodeAfter = nodeAfter->GetNext() )
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{
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wxRadioButton *btn = wxDynamicCast(nodeAfter->GetData(),
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wxRadioButton);
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if ( !btn )
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continue;
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if ( btn->HasFlag(wxRB_GROUP | wxRB_SINGLE) )
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{
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// no more buttons or the first button of the next group
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break;
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}
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if ( btn == focus )
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shouldSetFocus = true;
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else if ( btn == focusInTLW )
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shouldSetTLWFocus = true;
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btn->SetValue(false);
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}
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if ( shouldSetFocus )
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SetFocus();
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else if ( shouldSetTLWFocus )
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tlw->SetLastFocus(this);
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}
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bool wxRadioButton::GetValue() const
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{
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wxASSERT_MSG( m_isChecked ==
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(::SendMessage(GetHwnd(), BM_GETCHECK, 0, 0L) != 0),
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wxT("wxRadioButton::m_isChecked is out of sync?") );
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return m_isChecked;
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}
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// ----------------------------------------------------------------------------
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// wxRadioButton event processing
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// ----------------------------------------------------------------------------
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void wxRadioButton::Command (wxCommandEvent& event)
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{
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SetValue(event.GetInt() != 0);
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ProcessCommand(event);
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}
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bool wxRadioButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
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{
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if ( param != BN_CLICKED )
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return false;
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if ( !m_isChecked )
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{
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// we need to manually update the button state as we use BS_RADIOBUTTON
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// and not BS_AUTORADIOBUTTON
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SetValue(true);
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wxCommandEvent event(wxEVT_RADIOBUTTON, GetId());
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event.SetEventObject( this );
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event.SetInt(true); // always checked
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ProcessCommand(event);
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}
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return true;
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}
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// ----------------------------------------------------------------------------
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// wxRadioButton geometry
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// ----------------------------------------------------------------------------
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wxSize wxRadioButton::DoGetBestSize() const
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{
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static int s_radioSize = 0;
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if ( !s_radioSize )
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{
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wxScreenDC dc;
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dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
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s_radioSize = dc.GetCharHeight();
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// radio button bitmap size under CE is bigger than the font height,
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// adding just one pixel seems to work fine for the default font but it
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// would be nice to find some better way to find the correct height
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#ifdef __WXWINCE__
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s_radioSize++;
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#endif // __WXWINCE__
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}
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wxString str = GetLabel();
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int wRadio, hRadio;
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if ( !str.empty() )
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{
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GetTextExtent(GetLabelText(str), &wRadio, &hRadio);
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wRadio += s_radioSize + GetCharWidth();
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if ( hRadio < s_radioSize )
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hRadio = s_radioSize;
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}
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else
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{
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wRadio = s_radioSize;
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hRadio = s_radioSize;
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}
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wxSize best(wRadio, hRadio);
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CacheBestSize(best);
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return best;
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}
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WXDWORD wxRadioButton::MSWGetStyle(long style, WXDWORD *exstyle) const
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{
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WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
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if ( HasFlag(wxRB_GROUP) )
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msStyle |= WS_GROUP;
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// we use BS_RADIOBUTTON and not BS_AUTORADIOBUTTON because the use of the
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// latter can easily result in the application entering an infinite loop
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// inside IsDialogMessage()
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//
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// we used to use BS_RADIOBUTTON only for wxRB_SINGLE buttons but there
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// doesn't seem to be any harm to always use it and it prevents some hangs,
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// see #9786
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msStyle |= BS_RADIOBUTTON;
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if ( style & wxCLIP_SIBLINGS )
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msStyle |= WS_CLIPSIBLINGS;
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if ( style & wxALIGN_RIGHT )
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msStyle |= BS_LEFTTEXT | BS_RIGHT;
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return msStyle;
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}
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#endif // wxUSE_RADIOBTN
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