public MainWindow()
{
InitializeComponent();
grid = Graph;// new VirtualCanvas();
grid.SmallScrollIncrement = new Size(_tileWidth + _tileMargin, _tileHeight + _tileMargin);
//Scroller.Content = grid;
object v = Scroller.GetValue(ScrollViewer.CanContentScrollProperty);
Canvas target = grid.ContentCanvas;
zoom = new MapZoom(target);
pan = new Pan(target, zoom);
rectZoom = new RectangleSelectionGesture(target, zoom, ModifierKeys.Control);
rectZoom.ZoomSelection = true;
autoScroll = new AutoScroll(target, zoom);
zoom.ZoomChanged += new EventHandler(OnZoomChanged);
grid.VisualsChanged += new EventHandler <VisualChangeEventArgs>(OnVisualsChanged);
ZoomSlider.ValueChanged += new RoutedPropertyChangedEventHandler <double>(OnZoomSliderValueChanged);
grid.Scale.Changed += new EventHandler(OnScaleChanged);
grid.Translate.Changed += new EventHandler(OnScaleChanged);
grid.Background = new SolidColorBrush(Color.FromRgb(0xd0, 0xd0, 0xd0));
grid.ContentCanvas.Background = Brushes.White;
AllocateNodes();
}
/// <summary>
/// Construct new AutoScroll object that will scroll the given target object within it's container
/// by attaching to the mouse events of the container.
/// </summary>
/// <param name="target">The target object to scroll</param>
/// <param name="zoom">The master MapZoom object that manages the actual render transform</param>
public AutoScroll(FrameworkElement target, MapZoom zoom)
{
_container = target.Parent as Panel;
_target = target;
_container.MouseDown += new MouseButtonEventHandler(OnMouseDown);
_container.MouseMove += new MouseEventHandler(OnMouseMove);
_container.MouseWheel += new MouseWheelEventHandler(OnMouseWheel);
Keyboard.AddKeyDownHandler(_container, new KeyEventHandler(OnKeyDown));
_zoom = zoom;
}
/// <summary>
/// Construct new Pan gesture object.
/// </summary>
/// <param name="target">The target to be panned, must live inside a container Panel</param>
/// <param name="zoom"></param>
public Pan(FrameworkElement target, MapZoom zoom)
{
this._target = target;
this._container = target.Parent as Panel;
if (this._container == null)
{
// todo: localization
throw new ArgumentException("Target object must live in a Panel");
}
this._zoom = zoom;
_container.MouseLeftButtonDown += new MouseButtonEventHandler(OnMouseLeftButtonDown);
_container.MouseLeftButtonUp += new MouseButtonEventHandler(OnMouseLeftButtonUp);
_container.MouseMove += new MouseEventHandler(OnMouseMove);
}
/// <summary>
/// Construct new RectangleSelectionGesture object for selecting things in the given target object.
/// </summary>
/// <param name="target">A FrameworkElement</param>
/// <param name="zoom">The MapZoom object that wraps this same target object</param>
public RectangleSelectionGesture(FrameworkElement target, MapZoom zoom, ModifierKeys mods)
{
_mods = mods;
_target = target;
_container = target.Parent as Panel;
if (_container == null)
{
throw new ArgumentException("Target object must live in a Panel");
}
_zoom = zoom;
_container.MouseLeftButtonDown += new MouseButtonEventHandler(OnMouseLeftButtonDown);
_container.MouseLeftButtonUp += new MouseButtonEventHandler(OnMouseLeftButtonUp);
_container.MouseMove += new MouseEventHandler(OnMouseMove);
}