slider95.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        msw/slider.cpp
// Purpose:     wxSlider, using the Win95 (and later) trackbar control
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id: slider95.cpp,v 1.86 2005/08/25 19:10:47 ABX Exp $
// Copyright:   (c) Julian Smart 1998
//                  Vadim Zeitlin 2004
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "slider95.h"
#endif

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

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_SLIDER

#ifndef WX_PRECOMP
    #include "wx/brush.h"
#endif

#include "wx/slider.h"
#include "wx/msw/subwin.h"

#if !(defined(__GNUWIN32_OLD__) && !defined(__CYGWIN10__))
    #include <commctrl.h>
#endif

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// indices of labels in wxSlider::m_labels
enum
{
    SliderLabel_Min,
    SliderLabel_Max,
    SliderLabel_Value,
    SliderLabel_Last
};

// the gap between the slider and the labels, in pixels
static const int HGAP = 5;

// ----------------------------------------------------------------------------
// XTI
// ----------------------------------------------------------------------------

#if wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxSliderStyle )

wxBEGIN_FLAGS( wxSliderStyle )
    // new style border flags, we put them first to
    // use them for streaming out
    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
    wxFLAGS_MEMBER(wxBORDER_RAISED)
    wxFLAGS_MEMBER(wxBORDER_STATIC)
    wxFLAGS_MEMBER(wxBORDER_NONE)

    // old style border flags
    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
    wxFLAGS_MEMBER(wxRAISED_BORDER)
    wxFLAGS_MEMBER(wxSTATIC_BORDER)
    wxFLAGS_MEMBER(wxBORDER)

    // standard window styles
    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
    wxFLAGS_MEMBER(wxWANTS_CHARS)
    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
    wxFLAGS_MEMBER(wxVSCROLL)
    wxFLAGS_MEMBER(wxHSCROLL)

    wxFLAGS_MEMBER(wxSL_HORIZONTAL)
    wxFLAGS_MEMBER(wxSL_VERTICAL)
    wxFLAGS_MEMBER(wxSL_AUTOTICKS)
    wxFLAGS_MEMBER(wxSL_LABELS)
    wxFLAGS_MEMBER(wxSL_LEFT)
    wxFLAGS_MEMBER(wxSL_TOP)
    wxFLAGS_MEMBER(wxSL_RIGHT)
    wxFLAGS_MEMBER(wxSL_BOTTOM)
    wxFLAGS_MEMBER(wxSL_BOTH)
    wxFLAGS_MEMBER(wxSL_SELRANGE)
    wxFLAGS_MEMBER(wxSL_INVERSE)

wxEND_FLAGS( wxSliderStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxSlider, wxControl,"wx/scrolbar.h")

wxBEGIN_PROPERTIES_TABLE(wxSlider)
    wxEVENT_RANGE_PROPERTY( Scroll , wxEVT_SCROLL_TOP , wxEVT_SCROLL_CHANGED , wxScrollEvent )
    wxEVENT_PROPERTY( Updated , wxEVT_COMMAND_SLIDER_UPDATED , wxCommandEvent )

    wxPROPERTY( Value , int , SetValue, GetValue , 0, 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( Minimum , int , SetMin, GetMin, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( Maximum , int , SetMax, GetMax, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( PageSize , int , SetPageSize, GetLineSize, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( LineSize , int , SetLineSize, GetLineSize, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( ThumbLength , int , SetThumbLength, GetThumbLength, 1 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY_FLAGS( WindowStyle , wxSliderStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxSlider)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_8( wxSlider , wxWindow* , Parent , wxWindowID , Id , int , Value , int , Minimum , int , Maximum , wxPoint , Position , wxSize , Size , long , WindowStyle )
#else
IMPLEMENT_DYNAMIC_CLASS(wxSlider, wxControl)
#endif

// ============================================================================
// wxSlider implementation
// ============================================================================

// ----------------------------------------------------------------------------
// construction
// ----------------------------------------------------------------------------

void wxSlider::Init()
{
    m_labels = NULL;

    m_pageSize = 1;
    m_lineSize = 1;
    m_rangeMax = 0;
    m_rangeMin = 0;
    m_tickFreq = 0;

    m_isDragging = false;
}

bool
wxSlider::Create(wxWindow *parent,
                 wxWindowID id,
                 int value,
                 int minValue,
                 int maxValue,
                 const wxPoint& pos,
                 const wxSize& size,
                 long style,
                 const wxValidator& validator,
                 const wxString& name)
{
    // our styles are redundant: wxSL_LEFT/RIGHT imply wxSL_VERTICAL and
    // wxSL_TOP/BOTTOM imply wxSL_HORIZONTAL, but for backwards compatibility
    // reasons we can't really change it, instead try to infer the orientation
    // from the flags given to us here
    switch ( style & (wxSL_LEFT | wxSL_RIGHT | wxSL_TOP | wxSL_BOTTOM) )
    {
        case wxSL_LEFT:
        case wxSL_RIGHT:
            style |= wxSL_VERTICAL;
            break;

        case wxSL_TOP:
        case wxSL_BOTTOM:
            style |= wxSL_HORIZONTAL;
            break;

        case 0:
            // no specific direction, do we have at least the orientation?
            if ( !(style & (wxSL_HORIZONTAL | wxSL_VERTICAL)) )
            {
                // no, choose default
                style |= wxSL_BOTTOM | wxSL_HORIZONTAL;
            }
    };

    wxASSERT_MSG( !(style & wxSL_VERTICAL) || !(style & wxSL_HORIZONTAL),
                    _T("incompatible slider direction and orientation") );


    // initialize everything
    if ( !CreateControl(parent, id, pos, size, style, validator, name) )
        return false;

    // ensure that we have correct values for GetLabelsSize()
    m_rangeMin = minValue;
    m_rangeMax = maxValue;

    // create the labels first, so that our DoGetBestSize() could take them
    // into account
    //
    // note that we could simply create 3 wxStaticTexts here but it could
    // result in some observable side effects at wx level (e.g. the parent of
    // wxSlider would have 3 more children than expected) and so we prefer not
    // to do it like this
    if ( m_windowStyle & wxSL_LABELS )
    {
        m_labels = new wxSubwindows(SliderLabel_Last);

        HWND hwndParent = GetHwndOf(parent);
        for ( size_t n = 0; n < SliderLabel_Last; n++ )
        {
            (*m_labels)[n] = ::CreateWindow
                               (
                                    wxT("STATIC"),
                                    NULL,
                                    WS_CHILD | WS_VISIBLE | SS_CENTER,
                                    0, 0, 0, 0,
                                    hwndParent,
                                    (HMENU)NewControlId(),
                                    wxGetInstance(),
                                    NULL
                               );
        }

        m_labels->SetFont(GetFont());
    }

    // now create the main control too
    if ( !MSWCreateControl(TRACKBAR_CLASS, wxEmptyString, pos, size) )
        return false;

    // and initialize everything
    SetRange(minValue, maxValue);
    SetValue(value);
    SetPageSize((maxValue - minValue)/10);

    // we need to position the labels correctly if we have them and if
    // SetSize() hadn't been called before (when best size was determined by
    // MSWCreateControl()) as in this case they haven't been put in place yet
    if ( m_labels && size.x != wxDefaultCoord && size.y != wxDefaultCoord )
    {
        SetSize(size);
    }

    return true;
}

WXDWORD wxSlider::MSWGetStyle(long style, WXDWORD *exstyle) const
{
    WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);

    // TBS_HORZ, TBS_RIGHT and TBS_BOTTOM are 0 but do include them for clarity
    msStyle |= style & wxSL_VERTICAL ? TBS_VERT : TBS_HORZ;

    if ( style & wxSL_BOTH )
    {
        // this fully specifies the style combined with TBS_VERT/HORZ above
        msStyle |= TBS_BOTH;
    }
    else // choose one direction
    {
        if ( style & wxSL_LEFT )
            msStyle |= TBS_LEFT;
        else if ( style & wxSL_RIGHT )
            msStyle |= TBS_RIGHT;
        else if ( style & wxSL_TOP )
            msStyle |= TBS_TOP;
        else if ( style & wxSL_BOTTOM )
            msStyle |= TBS_BOTTOM;
    }

    if ( style & wxSL_AUTOTICKS )
        msStyle |= TBS_AUTOTICKS;
    else
        msStyle |= TBS_NOTICKS;

    if ( style & wxSL_SELRANGE )
        msStyle |= TBS_ENABLESELRANGE;

    return msStyle;
}

wxSlider::~wxSlider()
{
    delete m_labels;
}

// ----------------------------------------------------------------------------
// event handling
// ----------------------------------------------------------------------------

bool wxSlider::MSWOnScroll(int WXUNUSED(orientation),
                           WXWORD wParam,
                           WXWORD WXUNUSED(pos),
                           WXHWND control)
{
    wxEventType scrollEvent;
    switch ( wParam )
    {
        case SB_TOP:
            scrollEvent = wxEVT_SCROLL_TOP;
            break;

        case SB_BOTTOM:
            scrollEvent = wxEVT_SCROLL_BOTTOM;
            break;

        case SB_LINEUP:
            scrollEvent = wxEVT_SCROLL_LINEUP;
            break;

        case SB_LINEDOWN:
            scrollEvent = wxEVT_SCROLL_LINEDOWN;
            break;

        case SB_PAGEUP:
            scrollEvent = wxEVT_SCROLL_PAGEUP;
            break;

        case SB_PAGEDOWN:
            scrollEvent = wxEVT_SCROLL_PAGEDOWN;
            break;

        case SB_THUMBTRACK:
            scrollEvent = wxEVT_SCROLL_THUMBTRACK;
            m_isDragging = true;
            break;

        case SB_THUMBPOSITION:
            if ( m_isDragging )
            {
                scrollEvent = wxEVT_SCROLL_THUMBRELEASE;
                m_isDragging = false;
            }
            else
            {
                // this seems to only happen when the mouse wheel is used: in
                // this case, as it might be unexpected to get THUMBRELEASE
                // without preceding THUMBTRACKs, we don't generate it at all
                // but generate CHANGED event because the control itself does
                // not send us SB_ENDSCROLL for whatever reason when mouse
                // wheel is used