fixed crash introduced in v1.41

[wxWidgets.git] / src / mac / carbon / tooltip.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        tooltip.cpp
// Purpose:     wxToolTip implementation
// Author:      Stefan Csomor
// Id:          $Id$
// Copyright:   (c) Stefan Csomor
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#include "wx/wxprec.h"

#if wxUSE_TOOLTIPS

#include "wx/app.h"
#include "wx/dc.h"
#include "wx/window.h"
#include "wx/tooltip.h"
#include "wx/timer.h"
#include "wx/geometry.h"
#include "wx/mac/uma.h"

//-----------------------------------------------------------------------------
// global data
//-----------------------------------------------------------------------------

class wxMacToolTipTimer ;

class wxMacToolTip
{
public :
    wxMacToolTip() ;
    ~wxMacToolTip() ;
    
    void Setup( WindowRef window , const wxString& text , const wxPoint& localPosition ) ;
    void Draw() ;
    void Clear() ;

    long GetMark()
    { return m_mark ; }

    bool IsShown()
    { return m_shown ; }

private :
    wxString    m_label ;
    wxPoint m_position ;
    Rect            m_rect ;
    WindowRef    m_window ;    
    PicHandle    m_backpict ;
    bool        m_shown ;
    long        m_mark ;
    wxMacToolTipTimer* m_timer ;

#if TARGET_CARBON
    wxMacCFStringHolder m_helpTextRef ;
#endif
} ;

class wxMacToolTipTimer : public wxTimer
{
public:
    wxMacToolTipTimer(wxMacToolTip* tip, int iMilliseconds) ;
    wxMacToolTipTimer() {} ;
    virtual ~wxMacToolTipTimer() {} ;

    void Notify()
    {
        if ( m_mark == m_tip->GetMark() )
            m_tip->Draw() ;    
    }

protected:
    wxMacToolTip*     m_tip;
    long        m_mark ;
};

//-----------------------------------------------------------------------------
// wxToolTip
//-----------------------------------------------------------------------------
static long s_ToolTipDelay = 500 ;
static bool s_ShowToolTips = true ;
static wxMacToolTip s_ToolTip ;
static wxWindow* s_LastWindowEntered = NULL ;
static wxRect2DInt s_ToolTipArea ;
static WindowRef s_ToolTipWindowRef = NULL ;

IMPLEMENT_ABSTRACT_CLASS(wxToolTip, wxObject)


wxToolTip::wxToolTip( const wxString &tip )
{
    m_text = tip;
    m_window = (wxWindow*) NULL;
}

wxToolTip::~wxToolTip()
{
}

void wxToolTip::SetTip( const wxString &tip )
{
    m_text = tip;
    
    if ( m_window )
    {
#if 0
    // update it immediately
    wxToolInfo ti(GetHwndOf(m_window));
    ti.lpszText = (wxChar *)m_text.c_str();
    
      (void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, 0, &ti);
#endif
    }
}

void wxToolTip::SetWindow( wxWindow *win )
{
    m_window = win ;
}

void wxToolTip::Enable( bool flag )
{
    if ( s_ShowToolTips != flag )
    {
        s_ShowToolTips = flag ;
 
        if ( s_ShowToolTips )
        {
        }
        else
        {
            s_ToolTip.Clear() ;
        }
    }
}

void wxToolTip::SetDelay( long msecs )
{
    s_ToolTipDelay = msecs ;
}

void wxToolTip::RelayEvent( wxWindow *win , wxMouseEvent &event )
{
    if ( s_ShowToolTips )
    {
        if ( event.GetEventType() == wxEVT_LEAVE_WINDOW )
        {
            s_ToolTip.Clear() ;
        }
        else if (event.GetEventType() == wxEVT_ENTER_WINDOW || event.GetEventType() == wxEVT_MOTION )
        {
            wxPoint2DInt where( event.m_x , event.m_y ) ;
            if ( s_LastWindowEntered == win && s_ToolTipArea.Contains( where ) )
            {
            }
            else
            {
                s_ToolTip.Clear() ;
                s_ToolTipArea = wxRect2DInt( event.m_x - 2 , event.m_y - 2 , 4 , 4 ) ;
                s_LastWindowEntered = win ;
                
                WindowRef window = MAC_WXHWND( win->MacGetTopLevelWindowRef() ) ;
                int x = event.m_x ;
                int y = event.m_y ;
                wxPoint local( x , y ) ;
                win->MacClientToRootWindow( &x, &y ) ;
                wxPoint windowlocal( x , y ) ;
                s_ToolTip.Setup( window , win->MacGetToolTipString( local ) , windowlocal ) ;
            }
        }
    }
}

void wxToolTip::RemoveToolTips()
{
    s_ToolTip.Clear() ;
}

// --- mac specific

wxMacToolTipTimer::wxMacToolTipTimer( wxMacToolTip *tip , int msec )
{
    m_tip = tip;
    m_mark = tip->GetMark() ;
    Start(msec, true);
}

wxMacToolTip::wxMacToolTip()
{
    m_window = NULL ;
    m_backpict = NULL ;
    m_timer = NULL ;
    m_mark = 0 ;
    m_shown = false ;
}

void wxMacToolTip::Setup( WindowRef win  , const wxString& text , const wxPoint& localPosition ) 
{
    m_mark++ ;

    Clear() ;
    m_position = localPosition ;
    m_label = text ;
    m_window =win;
    s_ToolTipWindowRef = m_window ;
    m_backpict = NULL ;

    if ( m_timer )
        delete m_timer ;

    m_timer = new wxMacToolTipTimer( this , s_ToolTipDelay ) ;
}

wxMacToolTip::~wxMacToolTip() 
{
    if ( m_timer )
    {
        delete m_timer ;
        m_timer = NULL;
    }

    if ( m_backpict ) 
        Clear() ;
}

const short kTipBorder = 2 ;
const short kTipOffset = 5 ;

void wxMacToolTip::Draw()
{
    if ( m_label.Length() == 0 )
        return ;
    
    if ( m_window == s_ToolTipWindowRef )
    {
        m_shown = true ;

#if TARGET_CARBON
        HMHelpContentRec tag ;
        tag.version = kMacHelpVersion;
        SetRect( &tag.absHotRect , m_position.x - 2 , m_position.y - 2 , m_position.x + 2 , m_position.y + 2 ) ;

        QDLocalToGlobalRect( GetWindowPort( m_window ) , &tag.absHotRect ) ;

        m_helpTextRef.Assign( m_label , wxFONTENCODING_DEFAULT ) ;
        tag.content[kHMMinimumContentIndex].contentType = kHMCFStringContent ;
        tag.content[kHMMinimumContentIndex].u.tagCFString = m_helpTextRef ;
        tag.content[kHMMaximumContentIndex].contentType = kHMCFStringContent ;
        tag.content[kHMMaximumContentIndex].u.tagCFString = m_helpTextRef ;
        tag.tagSide = kHMDefaultSide;
        HMDisplayTag( &tag );
#else
        wxMacPortStateHelper help( (GrafPtr)GetWindowPort( m_window ) );
        FontFamilyID fontId ;
        Str255 fontName ;
        SInt16 fontSize ;
        Style fontStyle ;
        GetThemeFont( kThemeSmallSystemFont , GetApplicationScript() , fontName , &fontSize , &fontStyle ) ;
        GetFNum( fontName, &fontId );

        TextFont( fontId ) ;
        TextSize( fontSize ) ;
        TextFace( fontStyle ) ;
        FontInfo fontInfo;
        ::GetFontInfo(&fontInfo);
        short lineh = fontInfo.ascent + fontInfo.descent + fontInfo.leading;
        short height = 0 ;

        int i = 0 ;
        int length = m_label.Length() ;
        int width = 0 ;
        int thiswidth = 0 ;
        int laststop = 0 ;
        wxCharBuffer text = m_label.mb_str( wxConvLocal ) ;

        while ( i < length )
        {
            if ( text[i] == 13 || text[i] == 10)
            {
                thiswidth = ::TextWidth( text , laststop , i - laststop ) ;
                if ( thiswidth > width )
                    width = thiswidth ;

                height += lineh ;
                laststop = i + 1 ;
            }

            i++ ;
        }

        if ( i - laststop > 0 )
        {
            thiswidth = ::TextWidth( text , laststop , i - laststop ) ;
            if ( thiswidth > width )
                width = thiswidth ;
            height += lineh ;
        }

        m_rect.left = m_position.x + kTipOffset;
        m_rect.top = m_position.y + kTipOffset;
        m_rect.right = m_rect.left + width + 2 * kTipBorder;

        m_rect.bottom = m_rect.top + height + 2 * kTipBorder;
        Rect r ;

        GetPortBounds( GetWindowPort( m_window ) , &r ) ;
        if ( m_rect.top < 0 )
        {
            m_rect.bottom += -m_rect.top ;
            m_rect.top = 0 ;
        }
        if ( m_rect.left < 0 )
        {
            m_rect.right += -m_rect.left ;
            m_rect.left = 0 ;
        }
        if ( m_rect.right > r.right )
        {
            m_rect.left -= (m_rect.right - r.right ) ;
            m_rect.right = r.right ;
        }
        if ( m_rect.bottom > r.bottom )
        {
            m_rect.top -= (m_rect.bottom - r.bottom) ;
            m_rect.bottom = r.bottom ;
        }

        GWorldPtr port ;            
        CGrafPtr    origPort ;
        GDHandle    origDevice ;

        ClipRect( &m_rect ) ;
        BackColor( whiteColor ) ;
        ForeColor(blackColor ) ;
        NewGWorld( &port , wxDisplayDepth() , &m_rect , NULL , NULL , 0 ) ;

        GetGWorld( &origPort , &origDevice ) ;
        SetGWorld( port , NULL ) ;

        m_backpict = OpenPicture(&m_rect);

        CopyBits(GetPortBitMapForCopyBits(GetWindowPort(m_window)), 
            GetPortBitMapForCopyBits(port), 
            &m_rect, 
            &m_rect, 
            srcCopy, 
            NULL);
        ClosePicture();
        SetGWorld( origPort , origDevice ) ;
        DisposeGWorld( port ) ;
        PenNormal() ;

        RGBColor tooltipbackground = { 0xFFFF , 0xFFFF , 0xC000 } ;
        BackColor( whiteColor ) ;
        RGBForeColor( &tooltipbackground ) ;

        PaintRect( &m_rect ) ;
        ForeColor(blackColor ) ;
        FrameRect( &m_rect ) ;
        SetThemeTextColor(kThemeTextColorNotification,wxDisplayDepth(),true) ;
        ::MoveTo( m_rect.left + kTipBorder , m_rect.top + fontInfo.ascent + kTipBorder);
        
        i = 0 ;
        laststop = 0 ;
        height = 0 ;
        
        while ( i < length )
        {
            if ( text[i] == 13 || text[i] == 10)
            {
                ::DrawText( text , laststop , i - laststop ) ;
                height += lineh ;
                ::MoveTo( m_rect.left + kTipBorder , m_rect.top + fontInfo.ascent + kTipBorder + height );
                laststop = i+1 ;
            }

            i++ ;
        }

        ::DrawText( text , laststop , i - laststop ) ;
        ::TextMode( srcOr ) ;        
#endif
    }
}

void wxToolTip::NotifyWindowDelete( WXHWND win ) 
{
    if ( win == s_ToolTipWindowRef )
        s_ToolTipWindowRef = NULL ;
}

void wxMacToolTip::Clear()
{
    m_mark++ ;

    if ( m_timer )
    {
        delete m_timer ;
        m_timer = NULL ;
    }

    if ( !m_shown )
        return ;
    
#if TARGET_CARBON
    HMHideTag() ;
    m_helpTextRef.Release() ;
#else         
    if ( m_window == s_ToolTipWindowRef && m_backpict )
    {
        wxMacPortStateHelper help( (GrafPtr)GetWindowPort( m_window ) ) ;

        m_shown = false ;

        BackColor( whiteColor ) ;
        ForeColor( blackColor ) ;
        DrawPicture( m_backpict, &m_rect );
        KillPicture( m_backpict );
        m_backpict = NULL ;
    }
#endif
}

#endif