wxWidgets/src/univ/checkbox.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        univ/checkbox.cpp
// Purpose:     wxCheckBox implementation
// Author:      Vadim Zeitlin
// Modified by:
// Created:     25.08.00
// RCS-ID:      $Id$
// Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#ifdef __GNUG__
    #pragma implementation "univcheckbox.h"
#endif

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_CHECKBOX

#ifndef WX_PRECOMP
    #include "wx/dcclient.h"
    #include "wx/checkbox.h"
    #include "wx/validate.h"

    #include "wx/button.h" // for wxACTION_BUTTON_XXX
#endif

#include "wx/univ/theme.h"
#include "wx/univ/renderer.h"
#include "wx/univ/inphand.h"
#include "wx/univ/colschem.h"

// ============================================================================
// implementation
// ============================================================================

IMPLEMENT_DYNAMIC_CLASS(wxCheckBox, wxControl)

// ----------------------------------------------------------------------------
// wxCheckBox
// ----------------------------------------------------------------------------

void wxCheckBox::Init()
{
    m_isPressed = FALSE;
    m_status = Status_Unchecked;
}

bool wxCheckBox::Create(wxWindow *parent,
                        wxWindowID id,
                        const wxString &label,
                        const wxPoint &pos,
                        const wxSize &size,
                        long style,
                        const wxValidator& validator,
                        const wxString &name)
{
    if ( !wxControl::Create(parent, id, pos, size, style, validator, name) )
        return FALSE;

    SetLabel(label);
    SetBestSize(size);

    CreateInputHandler(wxINP_HANDLER_CHECKBOX);

    return TRUE;
}

// ----------------------------------------------------------------------------
// checkbox interface
// ----------------------------------------------------------------------------

bool wxCheckBox::GetValue() const
{
    return m_status == Status_Checked;
}

void wxCheckBox::SetValue(bool value)
{
    Status status = value ? Status_Checked : Status_Unchecked;
    if ( status != m_status )
    {
        m_status = status;

        if ( m_status == Status_Checked )
        {
            // invoke the hook
            OnCheck();
        }

        Refresh();
    }
}

void wxCheckBox::OnCheck()
{
    // we do nothing here
}

// ----------------------------------------------------------------------------
// indicator bitmaps
// ----------------------------------------------------------------------------

wxBitmap wxCheckBox::GetBitmap(State state, Status status) const
{
    wxBitmap bmp = m_bitmaps[state][status];
    if ( !bmp.Ok() )
        bmp = m_bitmaps[State_Normal][status];

    return bmp;
}

void wxCheckBox::SetBitmap(const wxBitmap& bmp, State state, Status status)
{
    m_bitmaps[state][status] = bmp;
}

// ----------------------------------------------------------------------------
// drawing
// ----------------------------------------------------------------------------

wxCheckBox::State wxCheckBox::GetState(int flags) const
{
    if ( flags & wxCONTROL_DISABLED )
        return State_Disabled;
    else if ( flags & wxCONTROL_PRESSED )
        return State_Pressed;
    else if ( flags & wxCONTROL_CURRENT )
        return State_Current;
    else
        return State_Normal;
}

void wxCheckBox::DoDraw(wxControlRenderer *renderer)
{
    int flags = GetStateFlags();

    wxDC& dc = renderer->GetDC();
    dc.SetFont(GetFont());
    dc.SetTextForeground(GetForegroundColour());

    if ( m_status == Status_Checked )
        flags |= wxCONTROL_CHECKED;

    wxBitmap bitmap(GetBitmap(GetState(flags), m_status));

    renderer->GetRenderer()->
        DrawCheckButton(dc,
                        GetLabel(),
                        bitmap,
                        renderer->GetRect(),
                        flags,
                        GetWindowStyle() & wxALIGN_RIGHT ? wxALIGN_RIGHT
                                                         : wxALIGN_LEFT,
                        GetAccelIndex());
}

// ----------------------------------------------------------------------------
// geometry calculations
// ----------------------------------------------------------------------------

wxSize wxCheckBox::GetBitmapSize() const
{
    wxBitmap bmp = GetBitmap(State_Normal, Status_Checked);
    return bmp.Ok() ? wxSize(bmp.GetWidth(), bmp.GetHeight())
                    : GetRenderer()->GetCheckBitmapSize();
}

wxSize wxCheckBox::DoGetBestClientSize() const
{
    wxClientDC dc(wxConstCast(this, wxCheckBox));
    dc.SetFont(GetFont());
    wxCoord width, height;
    dc.GetMultiLineTextExtent(GetLabel(), &width, &height);

    wxSize sizeBmp = GetBitmapSize();
    if ( height < sizeBmp.y )
        height = sizeBmp.y;

#if wxUNIV_COMPATIBLE_MSW
    // this looks better but is different from what wxMSW does
    height += GetCharHeight()/2;
#endif // wxUNIV_COMPATIBLE_MSW

    width += sizeBmp.x + 2*GetCharWidth();

    return wxSize(width, height);
}

// ----------------------------------------------------------------------------
// checkbox actions
// ----------------------------------------------------------------------------

void wxCheckBox::Press()
{
    if ( !m_isPressed )
    {
        m_isPressed = TRUE;

        Refresh();
    }
}

void wxCheckBox::Release()
{
    if ( m_isPressed )
    {
        m_isPressed = FALSE;

        Refresh();
    }
}

void wxCheckBox::Toggle()
{
    m_isPressed = FALSE;

    ChangeValue(!GetValue());
}

void wxCheckBox::ChangeValue(bool value)
{
    SetValue(value);

    SendEvent();
}

void wxCheckBox::SendEvent()
{
    wxCommandEvent event(wxEVT_COMMAND_CHECKBOX_CLICKED, GetId());
    InitCommandEvent(event);
    event.SetInt(IsChecked());
    Command(event);
}

// ----------------------------------------------------------------------------
// input handling
// ----------------------------------------------------------------------------

bool wxCheckBox::PerformAction(const wxControlAction& action,
                               long numArg,
                               const wxString& strArg)
{
    if ( action == wxACTION_BUTTON_PRESS )
        Press();
    else if ( action == wxACTION_BUTTON_RELEASE )
        Release();
    if ( action == wxACTION_CHECKBOX_CHECK )
        ChangeValue(TRUE);
    else if ( action == wxACTION_CHECKBOX_CLEAR )
        ChangeValue(FALSE);
    else if ( action == wxACTION_CHECKBOX_TOGGLE )
        Toggle();
    else
        return wxControl::PerformAction(action, numArg, strArg);

    return TRUE;
}

// ----------------------------------------------------------------------------
// wxStdCheckboxInputHandler
// ----------------------------------------------------------------------------

wxStdCheckboxInputHandler::wxStdCheckboxInputHandler(wxInputHandler *inphand)
                         : wxStdButtonInputHandler(inphand)
{
}

bool wxStdCheckboxInputHandler::HandleActivation(wxInputConsumer *consumer,
                                                 bool WXUNUSED(activated))
{
    // only the focused checkbox appearance changes when the app gains/loses
    // activation
    return consumer->GetInputWindow()->IsFocused();
}

#endif // wxUSE_CHECKBOX