src/cocoa/slider.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/cocoa/slider.mm
   3 // Purpose:     wxSlider
   4 // Author:      David Elliott
   5 //              Mark Oxenham
   6 // Modified by:
   7 // Created:     2003/06/19
   8 // Copyright:   (c) 2003 David Elliott
   9 //              (c) 2007 Software 2000 Ltd.
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_SLIDER
  16
  17 #include "wx/slider.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/app.h"
  21 #endif //WX_PRECOMP
  22
  23 #import <Foundation/NSString.h>
  24 #include "wx/cocoa/objc/NSSlider.h"
  25 #import <AppKit/NSEvent.h>
  26 #import <AppKit/NSWindow.h>
  27
  28 BEGIN_EVENT_TABLE(wxSlider, wxSliderBase)
  29 END_EVENT_TABLE()
  30 WX_IMPLEMENT_COCOA_OWNER(wxSlider,NSSlider,NSControl,NSView)
  31
  32
  33 inline void AdjustDimension(
  34                 bool            isTicksStyle,
  35                 int             &pos,
  36                 wxSize          &size,
  37                 int             (wxSize::*GetDimension)() const,
  38                 void            (wxSize::*SetDimension)(int))
  39 {
  40     const int dimension = (size.*GetDimension)();
  41     const int minSize = (isTicksStyle) ? 23 : 20;
  42
  43     // prevent clipping of overly "thin" sliders
  44     if (dimension < minSize)
  45     {
  46         (size.*SetDimension)(minSize);
  47     }
  48
  49     // move the slider control to the middle of the dimension that is not
  50     // being used to define its length
  51     pos += (dimension - (size.*GetDimension)() + 1) / 2;
  52 }
  53
  54 bool wxSlider::Create(wxWindow *parent, wxWindowID winid,
  55             int value, int minValue, int maxValue,
  56             const wxPoint& pos, const wxSize& size, long style,
  57             const wxValidator& validator, const wxString& name)
  58 {
  59     wxSize adjustedSize(size);
  60     wxPoint adjustedPos(pos);
  61     const bool isTicksStyle = (style & wxSL_TICKS) != 0;
  62
  63     if ((style & wxSL_HORIZONTAL) && (size.GetHeight() != wxDefaultCoord))
  64     {
  65         AdjustDimension(isTicksStyle, adjustedPos.y, adjustedSize, &wxSize::GetHeight, &wxSize::SetHeight);
  66     }
  67     else if ((style & wxSL_VERTICAL) && (size.GetWidth() != wxDefaultCoord))
  68     {
  69         AdjustDimension(isTicksStyle, adjustedPos.x, adjustedSize, &wxSize::GetWidth, &wxSize::SetWidth);
  70     }
  71
  72     if(!CreateControl(parent,winid,adjustedPos,adjustedSize,style,validator,name))
  73         return false;
  74     SetNSSlider([[WX_GET_OBJC_CLASS(WXNSSlider) alloc] initWithFrame: MakeDefaultNSRect(adjustedSize)]);
  75     [m_cocoaNSView release];
  76
  77     if(m_parent)
  78         m_parent->CocoaAddChild(this);
  79     SetInitialFrameRect(adjustedPos,adjustedSize);
  80
  81     SetRange(minValue, maxValue);
  82     SetValue(value);
  83
  84     // -1 default for wxSL_AUTOTICKS == false
  85     int tickMarks = -1;
  86     // minValue > maxValue not handled, tickMarks set to 0
  87     if ( style & wxSL_AUTOTICKS )
  88         tickMarks = ((maxValue - minValue >= 0) ? (maxValue - minValue) : 0);
  89     SetTickFreq(tickMarks);
  90
  91     return true;
  92 }
  93
  94 wxSlider::~wxSlider()
  95 {
  96     DisassociateNSSlider(GetNSSlider());
  97 }
  98
  99 void wxSlider::AssociateNSSlider(WX_NSSlider theSlider)
 100 {
 101     wxCocoaNSSlider::AssociateNSSlider(theSlider);
 102     // Set the target/action.. we don't really need to unset these
 103     [theSlider setTarget:wxCocoaNSControl::sm_cocoaTarget];
 104     [theSlider setAction:@selector(wxNSControlAction:)];
 105 }
 106
 107 void wxSlider::ProcessEventType(wxEventType commandType)
 108 {
 109     wxScrollEvent event(commandType, GetId(), GetValue(), HasFlag(wxSL_VERTICAL)?wxVERTICAL:wxHORIZONTAL);
 110     event.SetEventObject(this);
 111     HandleWindowEvent(event);
 112 }
 113
 114 static inline wxEventType wxSliderEventTypeForKeyFromEvent(NSEvent *theEvent)
 115 {
 116     NSString *theEventCharacters = [theEvent charactersIgnoringModifiers];
 117
 118     if ([theEventCharacters length] == 1)
 119     {
 120         switch ([theEventCharacters characterAtIndex:0])
 121         {
 122             case NSUpArrowFunctionKey:
 123             case NSRightArrowFunctionKey:   return wxEVT_SCROLL_PAGEDOWN;
 124             case NSDownArrowFunctionKey:
 125             case NSLeftArrowFunctionKey:    return wxEVT_SCROLL_PAGEUP;
 126             case NSPageUpFunctionKey:       return wxEVT_SCROLL_BOTTOM;
 127             case NSPageDownFunctionKey:     return wxEVT_SCROLL_TOP;
 128         }
 129     }
 130     // Overload wxEVT_ANY to mean we can't determine the event type.
 131     return wxEVT_ANY;
 132 }
 133
 134 void wxSlider::CocoaTarget_action()
 135 {
 136     wxEventType sliderEventType;
 137     SEL theSelector = wxCocoaNSSlider::GetLastResponderSelector();
 138
 139     if(         theSelector == @selector(moveUp:)
 140             ||  theSelector == @selector(moveRight:))
 141         sliderEventType = wxEVT_SCROLL_PAGEDOWN;
 142     else if(    theSelector == @selector(moveDown:)
 143             ||  theSelector == @selector(moveLeft:))
 144         sliderEventType = wxEVT_SCROLL_PAGEUP;
 145     else if(    theSelector == @selector(pageUp:))
 146         sliderEventType = wxEVT_SCROLL_BOTTOM;
 147     else if(    theSelector == @selector(pageDown:))
 148         sliderEventType = wxEVT_SCROLL_TOP;
 149     else if(    theSelector == @selector(keyDown:))
 150         // This case should ideally never be reached.
 151         sliderEventType = wxSliderEventTypeForKeyFromEvent([[GetNSSlider() window] currentEvent]);
 152     else
 153         // Don't generate an event.
 154         return;
 155     if(sliderEventType != wxEVT_ANY)
 156         ProcessEventType(sliderEventType);
 157 }
 158
 159 void wxSlider::CocoaNotification_startTracking(WX_NSNotification notification)
 160 {
 161     CocoaNotification_continueTracking(notification);
 162 }
 163
 164 void wxSlider::CocoaNotification_continueTracking(WX_NSNotification notification)
 165 {
 166     const double realValue = [GetNSSlider() doubleValue];
 167
 168     if (realValue != [GetNSSlider() intValue])
 169     {
 170         SetValue(rint(realValue));
 171     }
 172
 173     ProcessEventType(wxEVT_SCROLL_THUMBTRACK);
 174 }
 175
 176 void wxSlider::CocoaNotification_stopTracking(WX_NSNotification notification)
 177 {
 178     ProcessEventType(wxEVT_SCROLL_THUMBRELEASE);
 179 }
 180
 181 int wxSlider::GetValue() const
 182 {
 183     return [GetNSSlider() intValue];
 184 }
 185
 186 void wxSlider::SetValue(int value)
 187 {
 188     [GetNSSlider() setIntValue:value];
 189 }
 190
 191 void wxSlider::SetRange(int minValue, int maxValue)
 192 {
 193     [GetNSSlider() setMinValue:minValue];
 194     [GetNSSlider() setMaxValue:maxValue];
 195 }
 196
 197 int wxSlider::GetMin() const
 198 {
 199     return [GetNSSlider() minValue];
 200 }
 201
 202 int wxSlider::GetMax() const
 203 {
 204     return [GetNSSlider() maxValue];
 205 }
 206
 207 void wxSlider::DoSetTickFreq(int n)
 208 {
 209     const int numTicks = (n > 0) ? ((GetMax() - GetMin()) / n) + 1 : 0;
 210     [GetNSSlider() setNumberOfTickMarks:numTicks];
 211 }
 212
 213 int wxSlider::GetTickFreq() const
 214 {
 215     const int numTicks = [GetNSSlider() numberOfTickMarks];
 216     return ((numTicks != 0) ? (GetMax() - GetMin()) / (numTicks - 1) : 0);
 217 }
 218
 219 void wxSlider::SetTickPos(int pos)
 220 {
 221     NSTickMarkPosition thePos = NSTickMarkBelow;
 222     wxSize size = GetSize();
 223
 224     if (size.GetWidth() < size.GetHeight()) // NSSlider isVertical method can return -1 if it has not been displayed.
 225     {
 226         thePos = (pos != 1) ? NSTickMarkLeft : NSTickMarkRight;
 227     }
 228     else
 229     {
 230         thePos = (pos != 1) ? NSTickMarkBelow : NSTickMarkAbove;
 231     }
 232
 233     [GetNSSlider() setTickMarkPosition:thePos];
 234 }
 235
 236 void wxSlider::SetLineSize(int lineSize)
 237 {
 238     // to do
 239 }
 240
 241 void wxSlider::SetPageSize(int pageSize)
 242 {
 243     // to do
 244 }
 245
 246 int wxSlider::GetLineSize() const
 247 {
 248     return 1;
 249 }
 250
 251 int wxSlider::GetPageSize() const
 252 {
 253     return 1;
 254 }
 255
 256 int wxSlider::GetThumbLength() const
 257 {
 258     return 1;
 259 }
 260
 261 void wxSlider::SetThumbLength(int lenPixels)
 262 {
 263     // to do
 264 }
 265
 266 #endif // wxUSE_SLIDER