src/osx/cocoa/combobox.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/cocoa/combobox.mm
   3 // Purpose:     wxChoice
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_COMBOBOX
  15
  16 #include "wx/combobox.h"
  17 #include "wx/evtloop.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/menu.h"
  21     #include "wx/dcclient.h"
  22 #endif
  23
  24 #include "wx/osx/cocoa/private/textimpl.h"
  25
  26 // work in progress
  27
  28 @interface wxNSTableDataSource : NSObject wxOSX_10_6_AND_LATER(<NSComboBoxDataSource>)
  29 {
  30     wxNSComboBoxControl* impl;
  31 }
  32
  33 - (NSInteger)numberOfItemsInComboBox:(NSComboBox *)aComboBox;
  34 - (id)comboBox:(NSComboBox *)aComboBox objectValueForItemAtIndex:(NSInteger)index;
  35
  36 @end
  37
  38
  39 @interface wxNSComboBox : NSComboBox
  40 {
  41 }
  42
  43 @end
  44
  45 @implementation wxNSComboBox
  46
  47 + (void)initialize
  48 {
  49     static BOOL initialized = NO;
  50     if (!initialized)
  51     {
  52         initialized = YES;
  53         wxOSXCocoaClassAddWXMethods( self );
  54     }
  55 }
  56
  57 - (void)controlTextDidChange:(NSNotification *)aNotification
  58 {
  59     wxUnusedVar(aNotification);
  60     wxWidgetCocoaImpl* impl = (wxWidgetCocoaImpl* ) wxWidgetImpl::FindFromWXWidget( self );
  61     if ( impl && impl->ShouldSendEvents() )
  62     {
  63         wxWindow* wxpeer = (wxWindow*) impl->GetWXPeer();
  64         if ( wxpeer ) {
  65             wxCommandEvent event(wxEVT_TEXT, wxpeer->GetId());
  66             event.SetEventObject( wxpeer );
  67             event.SetString( static_cast<wxComboBox*>(wxpeer)->GetValue() );
  68             wxpeer->HandleWindowEvent( event );
  69         }
  70     }
  71 }
  72
  73 - (void)comboBoxSelectionDidChange:(NSNotification *)notification
  74 {
  75     wxUnusedVar(notification);
  76     wxWidgetCocoaImpl* impl = (wxWidgetCocoaImpl* ) wxWidgetImpl::FindFromWXWidget( self );
  77     if ( impl && impl->ShouldSendEvents())
  78     {
  79         wxComboBox* wxpeer = static_cast<wxComboBox*>(impl->GetWXPeer());
  80         if ( wxpeer ) {
  81             const int sel = wxpeer->GetSelection();
  82
  83             wxCommandEvent event(wxEVT_COMBOBOX, wxpeer->GetId());
  84             event.SetEventObject( wxpeer );
  85             event.SetInt( sel );
  86             event.SetString( wxpeer->GetString(sel) );
  87             // For some reason, wxComboBox::GetValue will not return the newly selected item
  88             // while we're inside this callback, so use AddPendingEvent to make sure
  89             // GetValue() returns the right value.
  90             wxEventLoop* const loop = (wxEventLoop*) wxEventLoopBase::GetActive();
  91             if ( loop )
  92                 loop->OSXUseLowLevelWakeup(true);
  93
  94             wxpeer->GetEventHandler()->AddPendingEvent( event );
  95
  96             if ( loop )
  97                 loop->OSXUseLowLevelWakeup(false);
  98         }
  99     }
 100 }
 101 @end
 102
 103 wxNSComboBoxControl::wxNSComboBoxControl( wxComboBox *wxPeer, WXWidget w )
 104     : wxNSTextFieldControl(wxPeer, wxPeer, w)
 105 {
 106     m_comboBox = (NSComboBox*)w;
 107 }
 108
 109 wxNSComboBoxControl::~wxNSComboBoxControl()
 110 {
 111 }
 112
 113 int wxNSComboBoxControl::GetSelectedItem() const
 114 {
 115     return [m_comboBox indexOfSelectedItem];
 116 }
 117
 118 void wxNSComboBoxControl::SetSelectedItem(int item)
 119 {
 120     SendEvents(false);
 121
 122     if ( item != wxNOT_FOUND )
 123     {
 124         wxASSERT_MSG( item >= 0 && item < [m_comboBox numberOfItems],
 125                       "Inavlid item index." );
 126         [m_comboBox selectItemAtIndex: item];
 127     }
 128     else // remove current selection (if we have any)
 129     {
 130         const int sel = GetSelectedItem();
 131         if ( sel != wxNOT_FOUND )
 132             [m_comboBox deselectItemAtIndex:sel];
 133     }
 134
 135     SendEvents(true);
 136 }
 137
 138 int wxNSComboBoxControl::GetNumberOfItems() const
 139 {
 140     return [m_comboBox numberOfItems];
 141 }
 142
 143 void wxNSComboBoxControl::InsertItem(int pos, const wxString& item)
 144 {
 145     [m_comboBox insertItemWithObjectValue:wxCFStringRef( item , m_wxPeer->GetFont().GetEncoding() ).AsNSString() atIndex:pos];
 146 }
 147
 148 void wxNSComboBoxControl::RemoveItem(int pos)
 149 {
 150     SendEvents(false);
 151     [m_comboBox removeItemAtIndex:pos];
 152     SendEvents(true);
 153 }
 154
 155 void wxNSComboBoxControl::Clear()
 156 {
 157     SendEvents(false);
 158     [m_comboBox removeAllItems];
 159     SendEvents(true);
 160 }
 161
 162 wxString wxNSComboBoxControl::GetStringAtIndex(int pos) const
 163 {
 164     return wxCFStringRef::AsString([m_comboBox itemObjectValueAtIndex:pos], m_wxPeer->GetFont().GetEncoding());
 165 }
 166
 167 int wxNSComboBoxControl::FindString(const wxString& text) const
 168 {
 169     NSInteger nsresult = [m_comboBox indexOfItemWithObjectValue:wxCFStringRef( text , m_wxPeer->GetFont().GetEncoding() ).AsNSString()];
 170
 171     int result;
 172     if (nsresult == NSNotFound)
 173         result = wxNOT_FOUND;
 174     else
 175         result = (int) nsresult;
 176     return result;
 177 }
 178
 179 void wxNSComboBoxControl::Popup()
 180 {
 181     id ax = NSAccessibilityUnignoredDescendant(m_comboBox);
 182     [ax accessibilitySetValue: [NSNumber numberWithBool: YES] forAttribute: NSAccessibilityExpandedAttribute];
 183 }
 184
 185 void wxNSComboBoxControl::Dismiss()
 186 {
 187     id ax = NSAccessibilityUnignoredDescendant(m_comboBox);
 188     [ax accessibilitySetValue: [NSNumber numberWithBool: NO] forAttribute: NSAccessibilityExpandedAttribute];
 189 }
 190
 191 wxWidgetImplType* wxWidgetImpl::CreateComboBox( wxComboBox* wxpeer,
 192                                     wxWindowMac* WXUNUSED(parent),
 193                                     wxWindowID WXUNUSED(id),
 194                                     wxMenu* WXUNUSED(menu),
 195                                     const wxPoint& pos,
 196                                     const wxSize& size,
 197                                     long style,
 198                                     long WXUNUSED(extraStyle))
 199 {
 200     NSRect r = wxOSXGetFrameForControl( wxpeer, pos , size ) ;
 201     wxNSComboBox* v = [[wxNSComboBox alloc] initWithFrame:r];
 202     if (style & wxCB_READONLY)
 203         [v setEditable:NO];
 204     wxNSComboBoxControl* c = new wxNSComboBoxControl( wxpeer, v );
 205     return c;
 206 }
 207
 208 wxSize wxComboBox::DoGetBestSize() const
 209 {
 210     int lbWidth = GetCount() > 0 ? 20 : 100;  // some defaults
 211     wxSize baseSize = wxWindow::DoGetBestSize();
 212     int lbHeight = baseSize.y;
 213     int wLine;
 214
 215     {
 216         wxClientDC dc(const_cast<wxComboBox*>(this));
 217
 218         // Find the widest line
 219         for(unsigned int i = 0; i < GetCount(); i++)
 220         {
 221             wxString str(GetString(i));
 222
 223             wxCoord width, height ;
 224             dc.GetTextExtent( str , &width, &height);
 225             wLine = width ;
 226
 227             lbWidth = wxMax( lbWidth, wLine ) ;
 228         }
 229
 230         // Add room for the popup arrow
 231         lbWidth += 2 * lbHeight ;
 232     }
 233
 234     return wxSize( lbWidth, lbHeight );
 235 }
 236
 237 #endif // wxUSE_COMBOBOX