地図の表示
図5の画面レイアウトはQt Designerで作成されていて，
- http://
chaos. troll. no/~hhartz/ visualaccess/ index. html
このURLの記述内容は，
リスト5 addresses.
Qt Software Oslo, Sandakerveien 116, 0402 OSLO, Norway
Qt Software Brisbane, Brisbane, Australia
Qt Software Silicon Valley, Redwood City, CA 94065, USA
Qt Software China, Beijing, China
Qt Software Berlin, Berlin, Germany
Qt Software Munich, Munich, Germany
技術評論社, 東京都新宿区市谷左内町21-13
この内容をQTreeViewに表示するために，
リスト6 addressmodel.
14: void initModel()
15: {
16: foreach ( QString address, this->addresses() ) {
17: QModelIndex idx = this->index( this->rowCount(), 0 , QModelIndex() );
18:
19: QStringList addressLines = address.split( "," );
20:
21: QStandardItem* item = new QStandardItem;
22: this->insertRow( this->rowCount(), item );
23:
24: item->setData( addressLines.first(), Qt::DisplayRole );
25: addressLines.removeFirst();
26:
27: item->setData( addressLines.join( "," ).trimmed(), Qt::UserRole );
28: }
29: }
1番目のフィールドをQTreeViewに表示し，
31: QStringList addresses() {
32: QFile file( "addresses.txt" );
33: if( file.open( QFile::ReadOnly) ) {
34: QString addressText = QString::fromUtf8( file.readAll() );
35: addressText.chop( 1 );
36: return addressText.split( QChar( '\n' ) );
37: }
38: return QStringList();
39: }
ファイル全体を読み込んで，
リスト7 mainwindow.
11: MainWindow::MainWindow( QWidget* parent, Qt::WFlags flags )
12: : QWidget( parent, flags )
13: {
14: ui.setupUi( this );
15:
16: ui.treeView->setModel( new AddressModel( this ) );
17: ui.treeView->header()->setStretchLastSection( true );
18:
19: connect( ui.treeView, SIGNAL(clicked(QModelIndex)), this, SLOT(showItem(QModelIndex)) );
20: ui.map->show();
21: }
QTreeViewにAddressModelを設定して住所の一覧を表示させ，
28: void MainWindow::showItem( const QModelIndex& idx )
29: {
30: ui.map->clearCoordinates();
31: ui.map->geoCode( idx.data( Qt::UserRole).toString() );
32: ui.nameLabel->setText( idx.data( Qt::DisplayRole ).toString() );
33: ui.addressLabel->setText( idx.data( Qt::UserRole ).toString() );
34: }
先に説明したのと同様に，
リスト8 map.
51: void Map::loadCoordinates()
52: {
53: QStringList scriptStr;
54: scriptStr
55: << "var map = new GMap2(document.getElementById(\"map\"));"
56: << "var bounds = new GLatLngBounds;"
57: << "var markers = [];"
58: << "map.setCenter( new GLatLng(0,0),1 );";
59:
60: int num=-1;
61: foreach( QPointF point, coordinates ) {
62: scriptStr << QString("markers[%1] = new GMarker(new GLatLng(%2, %3));")
63: .arg(++num)
64: .arg(point.x())
65: .arg(point.y());
66: }
67:
68: scriptStr
69: << "for( var i=0; i<markers.length; ++i ) {"
70: << " bounds.extend(markers[i].getPoint());"
71: << " map.addOverlay(markers[i]);"
72: << "}"
73: << "map.setCenter(bounds.getCenter());";
74:
75:
76: this->page()->mainFrame()->evaluateJavaScript( scriptStr.join("\n") );
77: }
得られた地理座標から地図上にマーカを表示し，