///////////////////////////////////////////////////////////////////////////// // Name: mymodels.cpp // Purpose: wxDataViewCtrl wxWidgets sample // Author: Robert Roebling // Modified by: Francesco Montorsi, Bo Yang // Created: 06/01/06 // RCS-ID: $Id$ // Copyright: (c) Robert Roebling // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // For compilers that support precompilation, includes "wx/wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #ifndef WX_PRECOMP #include "wx/wx.h" #endif #include "wx/dataview.h" #include "mymodels.h" // ---------------------------------------------------------------------------- // resources // ---------------------------------------------------------------------------- #include "null.xpm" #include "wx_small.xpm" // ---------------------------------------------------------------------------- // MyMusicTreeModel // ---------------------------------------------------------------------------- MyMusicTreeModel::MyMusicTreeModel() { m_root = new MyMusicTreeModelNode( NULL, "My Music" ); // setup pop music m_pop = new MyMusicTreeModelNode( m_root, "Pop music" ); m_pop->Append( new MyMusicTreeModelNode( m_pop, "You are not alone", "Michael Jackson", 1995 ) ); m_pop->Append( new MyMusicTreeModelNode( m_pop, "Take a bow", "Madonna", 1994 ) ); m_root->Append( m_pop ); // setup classical music m_classical = new MyMusicTreeModelNode( m_root, "Classical music" ); m_ninth = new MyMusicTreeModelNode( m_classical, "Ninth symphony", "Ludwig van Beethoven", 1824 ); m_classical->Append( m_ninth ); m_classical->Append( new MyMusicTreeModelNode( m_classical, "German Requiem", "Johannes Brahms", 1868 ) ); m_root->Append( m_classical ); m_classicalMusicIsKnownToControl = false; } wxString MyMusicTreeModel::GetTitle( const wxDataViewItem &item ) const { MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); if (!node) // happens if item.IsOk()==false return wxEmptyString; return node->m_title; } wxString MyMusicTreeModel::GetArtist( const wxDataViewItem &item ) const { MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); if (!node) // happens if item.IsOk()==false return wxEmptyString; return node->m_artist; } int MyMusicTreeModel::GetYear( const wxDataViewItem &item ) const { MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); if (!node) // happens if item.IsOk()==false return 2000; return node->m_year; } void MyMusicTreeModel::AddToClassical( const wxString &title, const wxString &artist, unsigned int year ) { if (!m_classical) { wxASSERT(m_root); // it was removed: restore it m_classical = new MyMusicTreeModelNode( m_root, "Classical music" ); m_root->Append( m_classical ); // notify control wxDataViewItem child( (void*) m_classical ); wxDataViewItem parent( (void*) m_root ); ItemAdded( parent, child ); } // add to the classical music node a new node: MyMusicTreeModelNode *child_node = new MyMusicTreeModelNode( m_classical, title, artist, year ); m_classical->Append( child_node ); // FIXME: what's m_classicalMusicIsKnownToControl for? if (m_classicalMusicIsKnownToControl) { // notify control wxDataViewItem child( (void*) child_node ); wxDataViewItem parent( (void*) m_classical ); ItemAdded( parent, child ); } } void MyMusicTreeModel::Delete( const wxDataViewItem &item ) { MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); if (!node) // happens if item.IsOk()==false return; wxDataViewItem parent( node->GetParent() ); if (!parent.IsOk()) { wxASSERT(node == m_root); // don't make the control completely empty: wxLogError( "Cannot remove the root item!" ); return; } // is the node one of those we keep stored in special pointers? if (node == m_pop) m_pop = NULL; else if (node == m_classical) m_classical = NULL; else if (node == m_ninth) m_ninth = NULL; // first remove the node from the parent's array of children; // NOTE: MyMusicTreeModelNodePtrArray is only an array of _pointers_ // thus removing the node from it doesn't result in freeing it node->GetParent()->GetChildren().Remove( node ); // free the node delete node; // notify control ItemDeleted( parent, item ); } int MyMusicTreeModel::Compare( const wxDataViewItem &item1, const wxDataViewItem &item2, unsigned int column, bool ascending ) const { wxASSERT(item1.IsOk() && item2.IsOk()); // should never happen if (IsContainer(item1) && IsContainer(item2)) { wxVariant value1, value2; GetValue( value1, item1, 0 ); GetValue( value2, item2, 0 ); wxString str1 = value1.GetString(); wxString str2 = value2.GetString(); int res = str1.Cmp( str2 ); if (res) return res; // items must be different wxUIntPtr litem1 = (wxUIntPtr) item1.GetID(); wxUIntPtr litem2 = (wxUIntPtr) item2.GetID(); return litem1-litem2; } return wxDataViewModel::Compare( item1, item2, column, ascending ); } void MyMusicTreeModel::GetValue( wxVariant &variant, const wxDataViewItem &item, unsigned int col ) const { wxASSERT(item.IsOk()); MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); switch (col) { case 0: variant = node->m_title; break; case 1: variant = node->m_artist; break; case 2: variant = (long) node->m_year; break; case 3: variant = node->m_quality; break; case 4: variant = 80L; // all music is very 80% popular break; case 5: if (GetYear(item) < 1900) variant = "old"; else variant = "new"; break; default: wxLogError( "MyMusicTreeModel::GetValue: wrong column %d", col ); } } bool MyMusicTreeModel::SetValue( const wxVariant &variant, const wxDataViewItem &item, unsigned int col ) { wxASSERT(item.IsOk()); MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); switch (col) { case 0: node->m_title = variant.GetString(); return true; case 1: node->m_artist = variant.GetString(); return true; case 2: node->m_year = variant.GetLong(); return true; case 3: node->m_quality = variant.GetString(); return true; default: wxLogError( "MyMusicTreeModel::SetValue: wrong column" ); } return false; } bool MyMusicTreeModel::IsEnabled( const wxDataViewItem &item, unsigned int col ) const { wxASSERT(item.IsOk()); MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); // disable Beethoven's ratings, his pieces can only be good return !(col == 3 && node->m_artist.EndsWith("Beethoven")); } wxDataViewItem MyMusicTreeModel::GetParent( const wxDataViewItem &item ) const { // the invisible root node has no parent if (!item.IsOk()) return wxDataViewItem(0); MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); // "MyMusic" also has no parent if (node == m_root) return wxDataViewItem(0); return wxDataViewItem( (void*) node->GetParent() ); } bool MyMusicTreeModel::IsContainer( const wxDataViewItem &item ) const { // the invisble root node can have children // (in our model always "MyMusic") if (!item.IsOk()) return true; MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) item.GetID(); return node->IsContainer(); } unsigned int MyMusicTreeModel::GetChildren( const wxDataViewItem &parent, wxDataViewItemArray &array ) const { MyMusicTreeModelNode *node = (MyMusicTreeModelNode*) parent.GetID(); if (!node) { array.Add( wxDataViewItem( (void*) m_root ) ); return 1; } if (node == m_classical) { MyMusicTreeModel *model = (MyMusicTreeModel*)(const MyMusicTreeModel*) this; model->m_classicalMusicIsKnownToControl = true; } if (node->GetChildCount() == 0) { return 0; } unsigned int count = node->GetChildren().GetCount(); for (unsigned int pos = 0; pos < count; pos++) { MyMusicTreeModelNode *child = node->GetChildren().Item( pos ); array.Add( wxDataViewItem( (void*) child ) ); } return count; } // ---------------------------------------------------------------------------- // MyListModel // ---------------------------------------------------------------------------- static int my_sort_reverse( int *v1, int *v2 ) { return *v2-*v1; } static int my_sort( int *v1, int *v2 ) { return *v1-*v2; } #define INITIAL_NUMBER_OF_ITEMS 10000 MyListModel::MyListModel() : wxDataViewVirtualListModel( INITIAL_NUMBER_OF_ITEMS ) { // the first 100 items are really stored in this model; // all the others are synthesized on request static const unsigned NUMBER_REAL_ITEMS = 100; m_textColValues.reserve(NUMBER_REAL_ITEMS); m_textColValues.push_back("first row with long label to test ellipsization"); for (unsigned int i = 1; i < NUMBER_REAL_ITEMS; i++) { m_textColValues.push_back(wxString::Format("real row %d", i)); } m_iconColValues.assign(NUMBER_REAL_ITEMS, "test"); m_icon[0] = wxIcon( null_xpm ); m_icon[1] = wxIcon( wx_small_xpm ); } void MyListModel::Prepend( const wxString &text ) { m_textColValues.Insert( text, 0 ); RowPrepended(); } void MyListModel::DeleteItem( const wxDataViewItem &item ) { unsigned int row = GetRow( item ); if (row >= m_textColValues.GetCount()) return; m_textColValues.RemoveAt( row ); RowDeleted( row ); } void MyListModel::DeleteItems( const wxDataViewItemArray &items ) { unsigned i; wxArrayInt rows; for (i = 0; i < items.GetCount(); i++) { unsigned int row = GetRow( items[i] ); if (row < m_textColValues.GetCount()) rows.Add( row ); } if (rows.GetCount() == 0) { // none of the selected items were in the range of the items // which we store... for simplicity, don't allow removing them wxLogError( "Cannot remove rows with an index greater than %d", m_textColValues.GetCount() ); return; } // Sort in descending order so that the last // row will be deleted first. Otherwise the // remaining indeces would all be wrong. rows.Sort( my_sort_reverse ); for (i = 0; i < rows.GetCount(); i++) m_textColValues.RemoveAt( rows[i] ); // This is just to test if wxDataViewCtrl can // cope with removing rows not sorted in // descending order rows.Sort( my_sort ); RowsDeleted( rows ); } void MyListModel::AddMany() { Reset( GetCount()+1000 ); } void MyListModel::GetValueByRow( wxVariant &variant, unsigned int row, unsigned int col ) const { switch ( col ) { case Col_EditableText: if (row >= m_textColValues.GetCount()) variant = wxString::Format( "virtual row %d", row ); else variant = m_textColValues[ row ]; break; case Col_IconText: { wxString text; if ( row >= m_iconColValues.GetCount() ) text = "virtual icon"; else text = m_iconColValues[row]; variant << wxDataViewIconText(text, m_icon[row % 2]); } break; case Col_TextWithAttr: { static const char *labels[5] = { "blue", "green", "red", "bold cyan", "default", }; variant = labels[row % 5]; } break; case Col_Custom: variant = wxString::Format("%d", row % 100); break; case Col_Max: wxFAIL_MSG( "invalid column" ); } } bool MyListModel::GetAttrByRow( unsigned int row, unsigned int col, wxDataViewItemAttr &attr ) const { switch ( col ) { case Col_EditableText: return false; case Col_IconText: if ( !(row % 2) ) return false; attr.SetColour(*wxLIGHT_GREY); break; case Col_TextWithAttr: case Col_Custom: // do what the labels defined in GetValueByRow() hint at switch ( row % 5 ) { case 0: attr.SetColour(*wxBLUE); break; case 1: attr.SetColour(*wxGREEN); break; case 2: attr.SetColour(*wxRED); break; case 3: attr.SetColour(*wxCYAN); attr.SetBold(true); break; case 4: return false; } break; case Col_Max: wxFAIL_MSG( "invalid column" ); } return true; } bool MyListModel::SetValueByRow( const wxVariant &variant, unsigned int row, unsigned int col ) { switch ( col ) { case Col_EditableText: case Col_IconText: if (row >= m_textColValues.GetCount()) { // the item is not in the range of the items // which we store... for simplicity, don't allow editing it wxLogError( "Cannot edit rows with an index greater than %d", m_textColValues.GetCount() ); return false; } if ( col == Col_EditableText ) { m_textColValues[row] = variant.GetString(); } else // col == Col_IconText { wxDataViewIconText iconText; iconText << variant; m_iconColValues[row] = iconText.GetText(); } return true; case Col_TextWithAttr: case Col_Custom: wxLogError("Cannot edit the column %d", col); break; case Col_Max: wxFAIL_MSG( "invalid column" ); } return false; } // ---------------------------------------------------------------------------- // MyListStoreDerivedModel // ---------------------------------------------------------------------------- bool MyListStoreDerivedModel::IsEnabledByRow(unsigned int row, unsigned int col) const { // disabled the last two checkboxes return !(col == 0 && 8 <= row && row <= 9); }