0cf2523391
Backported from head git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20027 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
285 lines
8.7 KiB
C++
285 lines
8.7 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: 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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// RCS-ID: $Id$
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// Copyright: (c) Julian Smart and Markus Holzem
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// Licence: wxWindows license
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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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#ifdef __GNUG__
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#pragma implementation "radiobut.h"
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#endif
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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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#ifndef WX_PRECOMP
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#include "wx/radiobut.h"
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#include "wx/settings.h"
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#include "wx/brush.h"
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#include "wx/dcscreen.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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IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
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void wxRadioButton::Init()
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{
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m_focusJustSet = 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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long msStyle = WS_TABSTOP;
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if ( HasFlag(wxRB_GROUP) )
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msStyle |= WS_GROUP;
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/*
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wxRB_SINGLE is a temporary workaround for the following problem: if you
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have 2 radiobuttons in the same group but which are not consecutive in
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the dialog, Windows can enter an infinite loop! The simplest way to
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reproduce it is to create radio button, then a panel and then another
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radio button: then checking the last button hangs the app.
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Ideally, we'd detect (and avoid) such situation automatically but for
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now, as I don't know how to do it, just allow the user to create
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BS_RADIOBUTTON buttons for such situations.
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*/
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msStyle |= HasFlag(wxRB_SINGLE) ? BS_RADIOBUTTON : BS_AUTORADIOBUTTON;
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if ( HasFlag(wxCLIP_SIBLINGS) )
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msStyle |= WS_CLIPSIBLINGS;
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if ( !MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, 0) )
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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 simlpest 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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// BST_CHECKED is defined as 1, BST_UNCHECKED as 0, so we can just pass
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// value as is (we don't use BST_XXX here as they're not defined for Win16)
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(void)::SendMessage(GetHwnd(), BM_SETCHECK, (WPARAM)value, 0L);
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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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if ( value )
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{
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const wxWindowList& siblings = GetParent()->GetChildren();
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wxWindowList::Node *nodeThis = siblings.Find(this);
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wxCHECK_RET( nodeThis, _T("radio button not a child of its parent?") );
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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::Node *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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// the radio buttons in a group must be consecutive, so
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// there are no more of them
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break;
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}
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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::Node *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 || btn->HasFlag(wxRB_GROUP) )
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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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btn->SetValue(FALSE);
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}
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}
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}
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bool wxRadioButton::GetValue() const
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{
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// NB: this will also return TRUE for BST_INDETERMINATE value if we ever
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// have 3-state radio buttons
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return ::SendMessage(GetHwnd(), BM_GETCHECK, 0, 0L) != 0;
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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.m_commandInt != 0);
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ProcessCommand(event);
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}
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void wxRadioButton::SetFocus()
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{
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// when the radio button receives a WM_SETFOCUS message it generates a
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// BN_CLICKED which is totally unexpected and leads to catastrophic results
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// if you pop up a dialog from the radio button event handler as, when the
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// dialog is dismissed, the focus is returned to the radio button which
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// generates BN_CLICKED which leads to showing another dialog and so on
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// without end!
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//
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// to avoid this, we drop the pseudo BN_CLICKED events generated when the
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// button gains focus
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m_focusJustSet = TRUE;
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wxControl::SetFocus();
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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_focusJustSet )
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{
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// see above: we want to ignore this event
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m_focusJustSet = FALSE;
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}
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else // a real clicked event
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{
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bool isChecked = GetValue();
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if ( HasFlag(wxRB_SINGLE) )
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{
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// when we use a "manual" radio button, we have to check the button
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// ourselves -- but it's reset to unchecked state by the user code
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// (presumably when another button is pressed)
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if ( !isChecked )
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SetValue(TRUE);
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}
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wxCommandEvent event(wxEVT_COMMAND_RADIOBUTTON_SELECTED, GetId());
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event.SetEventObject( this );
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event.SetInt(isChecked);
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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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}
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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(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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return wxSize(wRadio, hRadio);
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}
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long wxRadioButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
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{
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if (nMsg == WM_SETFOCUS)
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{
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m_focusJustSet = TRUE;
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long ret = wxControl::MSWWindowProc(nMsg, wParam, lParam);
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m_focusJustSet = FALSE;
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return ret;
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}
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return wxControl::MSWWindowProc(nMsg, wParam, lParam);
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}
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#endif // wxUSE_RADIOBTN
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