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 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2003 David Elliott
  10 //              (c) 2007 Software 2000 Ltd.
  11 // Licence:     wxWidgets licence
  12 /////////////////////////////////////////////////////////////////////////////
  13
  14 #include "wx/wxprec.h"
  15
  16 #if wxUSE_SLIDER
  17
  18 #include "wx/slider.h"
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/app.h"
  22 #endif //WX_PRECOMP
  23
  24 #import <Foundation/NSString.h>
  25 #include "wx/cocoa/objc/NSSlider.h"
  26 #import <AppKit/NSEvent.h>
  27 #import <AppKit/NSWindow.h>
  28
  29 IMPLEMENT_DYNAMIC_CLASS(wxSlider, wxControl)
  30     BEGIN_EVENT_TABLE(wxSlider, wxSliderBase)
  31 END_EVENT_TABLE()
  32 WX_IMPLEMENT_COCOA_OWNER(wxSlider,NSSlider,NSControl,NSView)
  33
  34
  35 inline void AdjustDimension(
  36                 bool            isTicksStyle,
  37                 int             &pos,
  38                 wxSize          &size,
  39                 int             (wxSize::*GetDimension)() const,
  40                 void            (wxSize::*SetDimension)(int))
  41 {
  42     const int dimension = (size.*GetDimension)();
  43     const int minSize = (isTicksStyle) ? 23 : 20;
  44
  45     // prevent clipping of overly "thin" sliders
  46     if (dimension < minSize)
  47     {
  48         (size.*SetDimension)(minSize);
  49     }
  50
  51     // move the slider control to the middle of the dimension that is not
  52     // being used to define its length
  53     pos += (dimension - (size.*GetDimension)() + 1) / 2;
  54 }
  55
  56 bool wxSlider::Create(wxWindow *parent, wxWindowID winid,
  57             int value, int minValue, int maxValue,
  58             const wxPoint& pos, const wxSize& size, long style,
  59             const wxValidator& validator, const wxString& name)
  60 {
  61     wxSize adjustedSize(size);
  62     wxPoint adjustedPos(pos);
  63     const bool isTicksStyle = (style & wxSL_TICKS) != 0;
  64
  65     if ((style & wxSL_HORIZONTAL) && (size.GetHeight() != wxDefaultCoord))
  66     {
  67         AdjustDimension(isTicksStyle, adjustedPos.y, adjustedSize, &wxSize::GetHeight, &wxSize::SetHeight);
  68     }
  69     else if ((style & wxSL_VERTICAL) && (size.GetWidth() != wxDefaultCoord))
  70     {
  71         AdjustDimension(isTicksStyle, adjustedPos.x, adjustedSize, &wxSize::GetWidth, &wxSize::SetWidth);
  72     }
  73
  74     if(!CreateControl(parent,winid,adjustedPos,adjustedSize,style,validator,name))
  75         return false;
  76     SetNSSlider([[WX_GET_OBJC_CLASS(WXNSSlider) alloc] initWithFrame: MakeDefaultNSRect(adjustedSize)]);
  77     [m_cocoaNSView release];
  78
  79     if(m_parent)
  80         m_parent->CocoaAddChild(this);
  81     SetInitialFrameRect(adjustedPos,adjustedSize);
  82
  83     SetRange(minValue, maxValue);
  84     SetValue(value);
  85
  86     // -1 default for wxSL_AUTOTICKS == false
  87     int tickMarks = -1;
  88     // minValue > maxValue not handled, tickMarks set to 0
  89     if ( style & wxSL_AUTOTICKS )
  90         tickMarks = ((maxValue - minValue >= 0) ? (maxValue - minValue) : 0);
  91     // arg2 needed a value, doesnt do anything
  92     SetTickFreq(tickMarks,1);
  93
  94     return true;
  95 }
  96
  97 wxSlider::~wxSlider()
  98 {
  99     DisassociateNSSlider(GetNSSlider());
 100 }
 101
 102 void wxSlider::AssociateNSSlider(WX_NSSlider theSlider)
 103 {
 104     wxCocoaNSSlider::AssociateNSSlider(theSlider);
 105     // Set the target/action.. we don't really need to unset these
 106     [theSlider setTarget:wxCocoaNSControl::sm_cocoaTarget];
 107     [theSlider setAction:@selector(wxNSControlAction:)];
 108 }
 109
 110 void wxSlider::ProcessEventType(wxEventType commandType)
 111 {
 112     wxScrollEvent event(commandType, GetId(), GetValue(), HasFlag(wxSL_VERTICAL)?wxVERTICAL:wxHORIZONTAL);
 113     event.SetEventObject(this);
 114     GetEventHandler()->ProcessEvent(event);
 115 }
 116
 117 static inline wxEventType wxSliderEventTypeForKeyFromEvent(NSEvent *theEvent)
 118 {
 119     NSString *theEventCharacters = [theEvent charactersIgnoringModifiers];
 120
 121     if ([theEventCharacters length] == 1)
 122     {
 123         switch ([theEventCharacters characterAtIndex:0])
 124         {
 125             case NSUpArrowFunctionKey:
 126             case NSRightArrowFunctionKey:   return wxEVT_SCROLL_PAGEDOWN;
 127             case NSDownArrowFunctionKey:
 128             case NSLeftArrowFunctionKey:    return wxEVT_SCROLL_PAGEUP;
 129             case NSPageUpFunctionKey:       return wxEVT_SCROLL_BOTTOM;
 130             case NSPageDownFunctionKey:     return wxEVT_SCROLL_TOP;
 131         }
 132     }
 133     // Overload wxEVT_ANY to mean we can't determine the event type.
 134     return wxEVT_ANY;
 135 }
 136
 137 void wxSlider::CocoaTarget_action()
 138 {
 139     wxEventType sliderEventType;
 140     SEL theSelector = wxCocoaNSSlider::GetLastResponderSelector();
 141
 142     if(         theSelector == @selector(moveUp:)
 143             ||  theSelector == @selector(moveRight:))
 144         sliderEventType = wxEVT_SCROLL_PAGEDOWN;
 145     else if(    theSelector == @selector(moveDown:)
 146             ||  theSelector == @selector(moveLeft:))
 147         sliderEventType = wxEVT_SCROLL_PAGEUP;
 148     else if(    theSelector == @selector(pageUp:))
 149         sliderEventType = wxEVT_SCROLL_BOTTOM;
 150     else if(    theSelector == @selector(pageDown:))
 151         sliderEventType = wxEVT_SCROLL_TOP;
 152     else if(    theSelector == @selector(keyDown:))
 153         // This case should ideally never be reached.
 154         sliderEventType = wxSliderEventTypeForKeyFromEvent([[GetNSSlider() window] currentEvent]);
 155     else
 156         // Don't generate an event.
 157         return;
 158     if(sliderEventType != wxEVT_ANY)
 159         ProcessEventType(sliderEventType);
 160 }
 161
 162 void wxSlider::CocoaNotification_startTracking(WX_NSNotification notification)
 163 {
 164     CocoaNotification_continueTracking(notification);
 165 }
 166
 167 void wxSlider::CocoaNotification_continueTracking(WX_NSNotification notification)
 168 {
 169     const double realValue = [GetNSSlider() doubleValue];
 170
 171     if (realValue != [GetNSSlider() intValue])
 172     {
 173         SetValue(rint(realValue));
 174     }
 175
 176     ProcessEventType(wxEVT_SCROLL_THUMBTRACK);
 177 }
 178
 179 void wxSlider::CocoaNotification_stopTracking(WX_NSNotification notification)
 180 {
 181     ProcessEventType(wxEVT_SCROLL_THUMBRELEASE);
 182 }
 183
 184 int wxSlider::GetValue() const
 185 {
 186     return [GetNSSlider() intValue];
 187 }
 188
 189 void wxSlider::SetValue(int value)
 190 {
 191     [GetNSSlider() setIntValue:value];
 192 }
 193
 194 void wxSlider::SetRange(int minValue, int maxValue)
 195 {
 196     [GetNSSlider() setMinValue:minValue];
 197     [GetNSSlider() setMaxValue:maxValue];
 198 }
 199
 200 int wxSlider::GetMin() const
 201 {
 202     return [GetNSSlider() minValue];
 203 }
 204
 205 int wxSlider::GetMax() const
 206 {
 207     return [GetNSSlider() maxValue];
 208 }
 209
 210 void wxSlider::SetTickFreq(int n, int pos)
 211 {
 212     const int numTicks = (n > 0) ? ((GetMax() - GetMin()) / n) + 1 : 0;
 213     [GetNSSlider() setNumberOfTickMarks:numTicks];
 214 }
 215
 216 int wxSlider::GetTickFreq() const
 217 {
 218     const int numTicks = [GetNSSlider() numberOfTickMarks];
 219     return ((numTicks != 0) ? (GetMax() - GetMin()) / (numTicks - 1) : 0);
 220 }
 221
 222 void wxSlider::SetTickPos(int pos)
 223 {
 224     NSTickMarkPosition thePos = NSTickMarkBelow;
 225     wxSize size = GetSize();
 226
 227     if (size.GetWidth() < size.GetHeight()) // NSSlider isVertical method can return -1 if it has not been displayed.
 228     {
 229         thePos = (pos != 1) ? NSTickMarkLeft : NSTickMarkRight;
 230     }
 231     else
 232     {
 233         thePos = (pos != 1) ? NSTickMarkBelow : NSTickMarkAbove;
 234     }
 235
 236     [GetNSSlider() setTickMarkPosition:thePos];
 237 }
 238
 239 void wxSlider::SetLineSize(int lineSize)
 240 {
 241     // to do
 242 }
 243
 244 void wxSlider::SetPageSize(int pageSize)
 245 {
 246     // to do
 247 }
 248
 249 int wxSlider::GetLineSize() const
 250 {
 251     return 1;
 252 }
 253
 254 int wxSlider::GetPageSize() const
 255 {
 256     return 1;
 257 }
 258
 259 int wxSlider::GetThumbLength() const
 260 {
 261     return 1;
 262 }
 263
 264 void wxSlider::SetThumbLength(int lenPixels)
 265 {
 266     // to do
 267 }
 268
 269 #endif // wxUSE_SLIDER