X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/05d790f834be56ea4f4a1d2896e9d56f2ef1d4f4..6f3f38980f10a935f3b47dbf0d3b4643e96a4be2:/src/common/lboxcmn.cpp

diff --git a/src/common/lboxcmn.cpp b/src/common/lboxcmn.cpp
index 27def6167d..5d7abb469f 100644
--- a/src/common/lboxcmn.cpp
+++ b/src/common/lboxcmn.cpp
@@ -33,6 +33,8 @@
     #include "wx/arrstr.h"
 #endif
 
+#include "wx/log.h"
+
 // ============================================================================
 // implementation
 // ============================================================================
@@ -57,6 +59,14 @@ bool wxListBoxBase::SetStringSelection(const wxString& s, bool select)
     return true;
 }
 
+void wxListBoxBase::SetSelection(int n)
+{
+    if ( !HasMultipleSelection() )
+        DoChangeSingleSelection(n);
+
+    DoSetSelection(n, true);
+}
+
 void wxListBoxBase::DeselectAll(int itemToLeaveSelected)
 {
     if ( HasMultipleSelection() )
@@ -84,108 +94,135 @@ void wxListBoxBase::DeselectAll(int itemToLeaveSelected)
 
 void wxListBoxBase::UpdateOldSelections()
 {
+    // We need to remember the selection even in single-selection case on
+    // Windows, so that we don't send an event when the user clicks on an
+    // already selected item.
+#ifndef __WXMSW__
     if (HasFlag(wxLB_MULTIPLE) || HasFlag(wxLB_EXTENDED))
+#endif
+    {
         GetSelections( m_oldSelections );
+    }
 }
 
-static void LBSendEvent( wxCommandEvent &event, wxListBoxBase *listbox, int item )
+bool wxListBoxBase::SendEvent(wxEventType evtType, int item, bool selected)
 {
-    event.SetInt( item );
-    event.SetString( listbox->GetString( item ) );
-    if ( listbox->HasClientObjectData() )
-        event.SetClientObject( listbox->GetClientObject(item) );
-    else if ( listbox->HasClientUntypedData() )
-        event.SetClientData( listbox->GetClientData(item) );
-    listbox->HandleWindowEvent( event );
+    wxCommandEvent event(evtType, GetId());
+    event.SetEventObject(this);
+
+    event.SetInt(item);
+    event.SetString(GetString(item));
+    event.SetExtraLong(selected);
+
+    if ( HasClientObjectData() )
+        event.SetClientObject(GetClientObject(item));
+    else if ( HasClientUntypedData() )
+        event.SetClientData(GetClientData(item));
+
+    return HandleWindowEvent(event);
 }
 
-void wxListBoxBase::CalcAndSendEvent()
+bool wxListBoxBase::DoChangeSingleSelection(int item)
 {
-    wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId() );
-    event.SetEventObject( this );
+    // As we don't use m_oldSelections in single selection mode, we store the
+    // last item that we notified the user about in it in this case because we
+    // need to remember it to be able to filter out the dummy selection changes
+    // that we get when the user clicks on an already selected item.
+    if ( !m_oldSelections.empty() && *m_oldSelections.begin() == item )
+    {
+        // Same item as the last time.
+        return false;
+    }
 
+    m_oldSelections.clear();
+    m_oldSelections.push_back(item);
+
+    return true;
+}
+
+bool wxListBoxBase::CalcAndSendEvent()
+{
     wxArrayInt selections;
-    GetSelections( selections );
-        
-        if ((selections.GetCount() == 0) && (m_oldSelections.GetCount() == 0))
-        {
-            // nothing changed, just leave
-            return;
-        }
-        
-        if (selections.GetCount() == m_oldSelections.GetCount())
+    GetSelections(selections);
+    bool selected = true;
+
+    if ( selections.empty() && m_oldSelections.empty() )
+    {
+        // nothing changed, just leave
+        return false;
+    }
+
+    const size_t countSel = selections.size(),
+                 countSelOld = m_oldSelections.size();
+    if ( countSel == countSelOld )
+    {
+        bool changed = false;
+        for ( size_t idx = 0; idx < countSel; idx++ )
         {
-            bool changed = false;
-            size_t idx;
-            for (idx = 0; idx < selections.GetCount(); idx++)
+            if (selections[idx] != m_oldSelections[idx])
             {
-                if (selections[idx] != m_oldSelections[idx])
-                {
-                    changed = true;
-                    break;
-                }
+                changed = true;
+                break;
             }
-            
-            // nothing changed, just leave
-            if (!changed)
-               return;
         }
 
-        if (selections.GetCount() == 0)
-        {
-            // indicate that this is a deselection
-            event.SetExtraLong( 0 );
-            int item = m_oldSelections[0];
-            m_oldSelections = selections;
-            LBSendEvent( event, this, item );
-            return;
-        }
-        
-        int item;
+        // nothing changed, just leave
+        if ( !changed )
+           return false;
+    }
+
+    int item = wxNOT_FOUND;
+    if ( selections.empty() )
+    {
+        selected = false;
+        item = m_oldSelections[0];
+    }
+    else // we [still] have some selections
+    {
         // Now test if any new item is selected
         bool any_new_selected = false;
-        size_t idx;
-        for (idx = 0; idx < selections.GetCount(); idx++)
+        for ( size_t idx = 0; idx < countSel; idx++ )
         {
             item = selections[idx];
-            if (m_oldSelections.Index(item) == wxNOT_FOUND)
+            if ( m_oldSelections.Index(item) == wxNOT_FOUND )
             {
                 any_new_selected = true;
                 break;
             }
         }
-        
-        if (any_new_selected)
-        {
-            // indicate that this is a selection
-            event.SetExtraLong( 1 );
-            m_oldSelections = selections;
-            LBSendEvent( event, this, item );
-            return;
-        }
-        
-        // Now test if any new item is deselected
-        bool any_new_deselected = false;
-        for (idx = 0; idx < m_oldSelections.GetCount(); idx++)
+
+        if ( !any_new_selected )
         {
-            item = m_oldSelections[idx];
-            if (selections.Index(item) == wxNOT_FOUND)
+            // No new items selected, now test if any new item is deselected
+            bool any_new_deselected = false;
+            for ( size_t idx = 0; idx < countSelOld; idx++ )
             {
-                any_new_deselected = true;
-                break;
+                item = m_oldSelections[idx];
+                if ( selections.Index(item) == wxNOT_FOUND )
+                {
+                    any_new_deselected = true;
+                    break;
+                }
+            }
+
+            if ( any_new_deselected )
+            {
+                // indicate that this is a selection
+                selected = false;
+            }
+            else
+            {
+                item = wxNOT_FOUND; // this should be impossible
             }
         }
-        
-        if (any_new_deselected)
-        {
-            // indicate that this is a selection
-            event.SetExtraLong( 0 );
-            m_oldSelections = selections;
-            LBSendEvent( event, this, item );
-            return;
-        }
-        
-        wxLogError( wxT("Wrong wxListBox selection") );
+    }
+
+    wxASSERT_MSG( item != wxNOT_FOUND,
+                  "Logic error in wxListBox selection event generation code" );
+
+    m_oldSelections = selections;
+
+    return SendEvent(wxEVT_COMMAND_LISTBOX_SELECTED, item, selected);
 }
 
 // ----------------------------------------------------------------------------
@@ -195,7 +232,7 @@ void wxListBoxBase::CalcAndSendEvent()
 void wxListBoxBase::Command(wxCommandEvent& event)
 {
     SetSelection(event.GetInt(), event.GetExtraLong() != 0);
-    (void)ProcessEvent(event);
+    (void)GetEventHandler()->ProcessEvent(event);
 }
 
 // ----------------------------------------------------------------------------