public void Can_transform_screen_point()
{
var rect = new RectangleF( 0, 0, 100, 200 );
var transform = new ScreenTransform( 1000, 2000, 1000, 2000 );
PointD point = transform.ToCoordinatePoint( rect, new PointF(10, 70) );
Assert.That( point.X, Is.EqualTo( 1100 ) );
Assert.That( point.Y, Is.EqualTo( 1200 ) );
}
public void Can_transform_point()
{
var rect = new RectangleF( 0, 0, 100, 200 );
var transform = new ScreenTransform( 1000, 2000, 1000, 2000 );
PointF point = transform.ToScreenPoint( rect, new PointD(1100, 1200) );
Assert.That( Math.Round(point.X,5), Is.EqualTo( 10 ) );
Assert.That( point.Y, Is.EqualTo( 70 ) );
}
public void Can_take_bounds_in_constructor()
{
var transform = new ScreenTransform(0,10,20,30);
Assert.That( transform.MinX, Is.EqualTo( 0 ) );
Assert.That( transform.MaxX, Is.EqualTo( 10 ) );
Assert.That( transform.MinY, Is.EqualTo( 20 ) );
Assert.That( transform.MaxY, Is.EqualTo( 30 ) );
}
public void Can_zoom_out()
{
var transform = new ScreenTransform( 0, 100, 0, 200 );
transform.ZoomOut( 10 );
Assert.That( transform.MinX, Is.EqualTo( -5 ) );
Assert.That( transform.MaxX, Is.EqualTo( 105 ) );
Assert.That( transform.MinY, Is.EqualTo( -10 ) );
Assert.That( transform.MaxY, Is.EqualTo( 210 ) );
}
public void Can_zoom_in()
{
var transform = new ScreenTransform( 0, 100, 0, 100 );
transform.ZoomIn( 10 );
Assert.That( transform.MinX, Is.EqualTo( 5 ) );
Assert.That( transform.MaxX, Is.EqualTo( 95 ) );
Assert.That( transform.MinY, Is.EqualTo( 5 ) );
Assert.That( transform.MaxY, Is.EqualTo( 95 ) );
}
public void Can_shift_by_screen_coordinates()
{
var rect = new RectangleF( 0, 0, 100, 200 );
var transform = new ScreenTransform( 1000, 2000, 1000, 2000 );
transform.ShiftByScreenDelta( rect, -10, -10 );
Assert.That( transform.MinX, Is.EqualTo( 900 ) );
Assert.That( transform.MaxX, Is.EqualTo( 1900 ) );
Assert.That( transform.MinY, Is.EqualTo( 900 ) );
Assert.That( transform.MaxY, Is.EqualTo( 1900 ) );
}
public void Zoom_is_relative_to_span_in_each_direction()
{
var transform = new ScreenTransform( 0, 100, 0, 200 );
transform.ZoomIn( 10 );
Assert.That( transform.MinX, Is.EqualTo( 5 ) );
Assert.That( transform.MaxX, Is.EqualTo( 95 ) );
Assert.That( transform.MinY, Is.EqualTo( 10 ) );
Assert.That( transform.MaxY, Is.EqualTo( 190 ) );
}
public void Max_zoom_in_one_step_is_fifty()
{
var transform = new ScreenTransform( 0, 100, 0, 100 );
transform.ZoomIn( 100 );
Assert.That( transform.MinX, Is.EqualTo( 25 ) );
Assert.That( transform.MaxX, Is.EqualTo( 75 ) );
Assert.That( transform.MinY, Is.EqualTo( 25 ) );
Assert.That( transform.MaxY, Is.EqualTo( 75 ) );
}