src/osx/cocoa/scrolbar.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/cocoa/scrolbar.mm
   3 // Purpose:     wxScrollBar
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id: scrolbar.cpp 54129 2008-06-11 19:30:52Z SC $
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:       wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/scrolbar.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/intl.h"
  18     #include "wx/log.h"
  19     #include "wx/settings.h"
  20 #endif
  21
  22 #include "wx/math.h"
  23 #include "wx/osx/private.h"
  24
  25 @interface wxNSScroller : NSScroller
  26 {
  27 }
  28 @end
  29
  30 @implementation wxNSScroller
  31
  32 + (void)initialize
  33 {
  34     static BOOL initialized = NO;
  35     if (!initialized)
  36     {
  37         initialized = YES;
  38         wxOSXCocoaClassAddWXMethods(self);
  39     }
  40 }
  41
  42 @end
  43
  44 class wxOSXScrollBarCocoaImpl : public wxWidgetCocoaImpl
  45 {
  46 public :
  47     wxOSXScrollBarCocoaImpl( wxWindowMac* peer, WXWidget w) : wxWidgetCocoaImpl( peer, w )
  48     {
  49         m_maximum = 1;
  50     }
  51
  52     void SetMaximum(wxInt32 v)
  53     {
  54         m_maximum = (v == 0) ? 1 : v;
  55     }
  56
  57     void    SetScrollThumb( wxInt32 value, wxInt32 thumbSize )
  58     {
  59         double v = ((double) value)/m_maximum;
  60         double t = ((double) thumbSize)/(m_maximum+thumbSize);
  61 #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
  62         [(wxNSScroller*) m_osxView setFloatValue:v knobProportion:t];
  63 #else
  64         [(wxNSScroller*) m_osxView setDoubleValue:v];
  65         [(wxNSScroller*) m_osxView setKnobProportion:t];
  66 #endif
  67     }
  68
  69     virtual wxInt32 GetValue() const
  70     {
  71         return wxRound([(wxNSScroller*) m_osxView floatValue] * m_maximum);
  72     }
  73
  74     virtual wxInt32 GetMaximum() const
  75     {
  76         return m_maximum;
  77     }
  78
  79     virtual void controlAction(WXWidget slf, void* _cmd, void *sender);
  80     virtual void mouseEvent(WX_NSEvent event, WXWidget slf, void* _cmd);
  81 protected:
  82     wxInt32 m_maximum;
  83 };
  84
  85 // we will have a mouseDown, then in the native
  86 // implementation of mouseDown the tracking code
  87 // is calling clickedAction, therefore we wire this
  88 // to thumbtrack and only after super mouseDown
  89 // returns we will call the thumbrelease
  90
  91 void wxOSXScrollBarCocoaImpl::controlAction( WXWidget WXUNUSED(slf), void *WXUNUSED(_cmd), void *WXUNUSED(sender))
  92 {
  93     wxEventType scrollEvent = wxEVT_NULL;
  94     switch ([(NSScroller*)m_osxView hitPart])
  95     {
  96     case NSScrollerIncrementLine:
  97         scrollEvent = wxEVT_SCROLL_LINEDOWN;
  98         break;
  99     case NSScrollerIncrementPage:
 100         scrollEvent = wxEVT_SCROLL_PAGEDOWN;
 101         break;
 102     case NSScrollerDecrementLine:
 103         scrollEvent = wxEVT_SCROLL_LINEUP;
 104         break;
 105     case NSScrollerDecrementPage:
 106         scrollEvent = wxEVT_SCROLL_PAGEUP;
 107         break;
 108     case NSScrollerKnob:
 109     case NSScrollerKnobSlot:
 110         scrollEvent = wxEVT_SCROLL_THUMBTRACK;
 111         break;
 112     case NSScrollerNoPart:
 113     default:
 114         return;
 115     }
 116
 117     wxWindow* wxpeer = (wxWindow*) GetWXPeer();
 118     if ( wxpeer )
 119         wxpeer->TriggerScrollEvent(scrollEvent);
 120 }
 121
 122 void wxOSXScrollBarCocoaImpl::mouseEvent(WX_NSEvent event, WXWidget slf, void *_cmd)
 123 {
 124     wxWidgetCocoaImpl::mouseEvent(event, slf, _cmd);
 125
 126     // send a release event in case we've been tracking the thumb
 127     if ( strcmp( sel_getName((SEL) _cmd) , "mouseDown:") == 0 )
 128     {
 129         NSScrollerPart hit = [(NSScroller*)m_osxView hitPart];
 130         if ( (hit == NSScrollerKnob || hit == NSScrollerKnobSlot) )
 131         {
 132             wxWindow* wxpeer = (wxWindow*) GetWXPeer();
 133             if ( wxpeer )
 134                 wxpeer->OSXHandleClicked(0);
 135         }
 136     }
 137 }
 138
 139 wxWidgetImplType* wxWidgetImpl::CreateScrollBar( wxWindowMac* wxpeer,
 140                                     wxWindowMac* WXUNUSED(parent),
 141                                     wxWindowID WXUNUSED(id),
 142                                     const wxPoint& pos,
 143                                     const wxSize& size,
 144                                     long style,
 145                                     long WXUNUSED(extraStyle))
 146 {
 147     NSRect r = wxOSXGetFrameForControl( wxpeer, pos , size ) ;
 148     // the creation rect defines the orientation
 149     NSRect createRect = ( style & wxSB_HORIZONTAL ) ? NSMakeRect(r.origin.x, r.origin.y , 17, 16) :
 150         NSMakeRect(r.origin.x, r.origin.y , 16, 17);
 151     wxNSScroller* v = [[wxNSScroller alloc] initWithFrame:createRect];
 152     [v setFrame:r];
 153
 154     wxWidgetCocoaImpl* c = new wxOSXScrollBarCocoaImpl( wxpeer, v );
 155     [v setEnabled:YES];
 156     return c;
 157 }