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 Vadim Zeitlin
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// 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, wxDefaultValidator, name) )
        return FALSE;

    SetLabel(label);
    SetBestSize(size);

    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;

        Refresh();
    }
}

// ----------------------------------------------------------------------------
// 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];
    if ( !bmp.Ok() )
        bmp = wxTheme::Get()->GetColourScheme()->GetCheckBitmap(state, status);

    return bmp;
}

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

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

void wxCheckBox::DoDraw(wxControlRenderer *renderer)
{
    State state;
    int flags = GetStateFlags();
    if ( flags & wxCONTROL_DISABLED )
        state = State_Disabled;
    else if ( flags & wxCONTROL_PRESSED )
        state = State_Pressed;
    else if ( flags & wxCONTROL_CURRENT )
        state = State_Current;
    else
        state = State_Normal;

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

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

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

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

    wxBitmap bmp = GetBitmap(State_Normal, Status_Checked);
    if ( height < bmp.GetHeight() )
        height = bmp.GetHeight();
    height += GetCharHeight()/2;

    width += bmp.GetWidth() + 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()
{
    ChangeValue(!GetValue());

    m_isPressed = FALSE;
}

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
// ----------------------------------------------------------------------------

wxString wxCheckBox::GetInputHandlerType() const
{
    return wxINP_HANDLER_CHECKBOX;
}

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::HandleMouse(wxControl *control,
                                            const wxMouseEvent& event)
{
    return wxStdButtonInputHandler::HandleMouse(control, event);
}

bool wxStdCheckboxInputHandler::HandleMouseMove(wxControl *control,
                                                const wxMouseEvent& event)
{
    return wxStdButtonInputHandler::HandleMouseMove(control, event);
}

#endif // wxUSE_CHECKBOX