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      1 /*
      2  * Copyright (C) 2009 Kevin Ollivier  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 
     27 #include "config.h"
     28 
     29 #include "scrollbar_render.h"
     30 
     31 #include <wx/defs.h>
     32 #include <wx/dc.h>
     33 #include <wx/dcgraph.h>
     34 #include <wx/renderer.h>
     35 
     36 #include <Carbon/Carbon.h>
     37 
     38 static int wxScrollbarPartToHIPressedState(wxScrollbarPart part)
     39 {
     40     switch (part) {
     41         case wxSCROLLPART_BACKBTNSTART:
     42             return kThemeTopOutsideArrowPressed;
     43         case wxSCROLLPART_BACKBTNEND:
     44             return kThemeTopOutsideArrowPressed; // This does not make much sense.  For some reason the outside constant is required.
     45         case wxSCROLLPART_FWDBTNSTART:
     46             return kThemeTopInsideArrowPressed;
     47         case wxSCROLLPART_FWDBTNEND:
     48             return kThemeBottomOutsideArrowPressed;
     49         case wxSCROLLPART_THUMB:
     50             return kThemeThumbPressed;
     51         default:
     52             return 0;
     53     }
     54 }
     55 
     56 void wxRenderer_DrawScrollbar(wxWindow* WXUNUSED(window), wxDC& dc,
     57                              const wxRect& rect, wxOrientation orient, int current,
     58                              wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int max, int step, int flags)
     59 {
     60     const wxCoord x = rect.x;
     61     const wxCoord y = rect.y;
     62     const wxCoord w = rect.width;
     63     const wxCoord h = rect.height;
     64 
     65     dc.SetBrush( *wxWHITE_BRUSH );
     66     dc.SetPen( *wxTRANSPARENT_PEN );
     67     dc.DrawRectangle(rect);
     68 
     69     dc.SetBrush( *wxTRANSPARENT_BRUSH );
     70 
     71     HIRect hiRect = CGRectMake( x, y, w, h );
     72 
     73     CGContextRef cgContext = NULL;
     74     wxGraphicsContext* gc = NULL;
     75 #if wxCHECK_VERSION(2,9,0)
     76     wxGCDCImpl *impl = dynamic_cast<wxGCDCImpl*> (dc.GetImpl());
     77     if (impl)
     78         gc = impl->GetGraphicsContext();
     79 #else
     80     gc = dc.GetGraphicsContext();
     81 #endif
     82     if (gc)
     83         cgContext = (CGContextRef) gc->GetNativeContext();
     84 
     85     if (cgContext)
     86     {
     87         HIThemeTrackDrawInfo trackInfo;
     88         trackInfo.version = 0;
     89         trackInfo.kind = kThemeMediumScrollBar;
     90         trackInfo.bounds = hiRect;
     91         trackInfo.min = 0;
     92         trackInfo.max = max;
     93         trackInfo.value = current;
     94         trackInfo.trackInfo.scrollbar.viewsize = step;
     95         trackInfo.attributes = 0;
     96         if (orient == wxHORIZONTAL)
     97             trackInfo.attributes |= kThemeTrackHorizontal;
     98         trackInfo.enableState = (flags & wxCONTROL_FOCUSED) ? kThemeTrackActive : kThemeTrackInactive;
     99         trackInfo.trackInfo.scrollbar.pressState = wxScrollbarPartToHIPressedState(focusPart);
    100         trackInfo.attributes |= kThemeTrackShowThumb;
    101 
    102         if (flags & wxCONTROL_DISABLED)
    103             trackInfo.enableState = kThemeTrackDisabled;
    104 
    105         HIThemeDrawTrack(&trackInfo, 0, cgContext, kHIThemeOrientationNormal);
    106     }
    107 }
    108