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