public async Task Invalidating_In_Handler_Causes_Layout_To_Be_Rerun_Before_LayoutUpdated_Raised()
{
await RunOnUIThread.Execute(async() =>
{
var root = CreateRoot();
var target = new TestCanvas();
var raised = 0;
var layoutUpdatedRaised = 0;
root.LayoutUpdated += (s, e) =>
{
Assert.Equal(2, target.MeasureCount);
Assert.Equal(2, target.ArrangeCount);
++layoutUpdatedRaised;
};
target.EffectiveViewportChanged += (s, e) =>
{
target.InvalidateMeasure();
++raised;
};
root.Child = target;
await ExecuteInitialLayoutPass(root);
Assert.Equal(1, raised);
Assert.Equal(1, layoutUpdatedRaised);
});
}
public PixelOffsetTransforms()
{
HorizontalContentAlignment = HorizontalAlignment.Stretch;
Spacing = 5;
var canvas = new TestCanvas();
var offsetMode = new EnumDropDown<PixelOffsetMode>();
offsetMode.SelectedValueBinding.Bind(canvas, c => c.PixelOffsetMode);
var testDropDown = new DropDown();
testDropDown.ItemTextBinding = Binding.Property((TestInfo t) => t.Name);
testDropDown.SelectedValueBinding.Cast<TestInfo>().Bind(canvas, c => c.Test);
testDropDown.DataStore = tests;
testDropDown.SelectedIndex = 0;
var options = new StackLayout
{
Orientation = Orientation.Horizontal,
VerticalContentAlignment = VerticalAlignment.Center,
Spacing = 5,
Padding = new Padding(10),
Items =
{
"PixelOffsetMode",
offsetMode,
"Test",
testDropDown
}
};
Items.Add(options);
Items.Add(new StackLayoutItem(canvas, true));
}
public void Draw_WithEllipse_ShouldWriteDrawingInfo()
{
var center = new Point(5, 5);
double horizontalRadius = 6;
double verticalRadius = 2;
var color = Color.Green;
var ellipse = new Ellipse(center, horizontalRadius, verticalRadius, color);
var sw = new StringWriter();
var canvas = new TestCanvas(sw);
ellipse.Draw(canvas);
var expectedString = $"Green ellipse with center: {center}; width: {horizontalRadius * 2}; height: {verticalRadius * 2}\r\n";
Assert.AreEqual(expectedString, sw.ToString());
}
public void Draw_WithTriangle_ShouldWriteDrawingInfo()
{
var vertex1 = new Point(-2, 3);
var vertex2 = new Point(4, 3);
var vertex3 = new Point(2, 5);
var color = Color.Green;
var triangle = new Triangle(vertex1, vertex2, vertex3, color);
var sw = new StringWriter();
var canvas = new TestCanvas(sw);
triangle.Draw(canvas);
var expectedString = $"Green line from {vertex1}, to {vertex2}\r\nGreen line from {vertex2}, to {vertex3}\r\nGreen line from {vertex3}, to {vertex1}\r\n";
Assert.AreEqual(expectedString, sw.ToString());
}
public void CanDrawTriangle()
{
var v1 = new Point(1, 2);
var v2 = new Point(4, 5);
var v3 = new Point(0, 5);
var color = Color.Red;
var triangle = new Triangle(v1, v2, v3, color);
TestCanvas canvas = new TestCanvas();
canvas.ExpectedData.Add($"{v1} {v2}");
canvas.ExpectedData.Add($"{v2} {v3}");
canvas.ExpectedData.Add($"{v3} {v1}");
triangle.Draw(canvas);
}
public void Draw_WithRegularPolygon_ShouldWriteDrawingInfo()
{
var center = new Point(100, 100);
double radius = 30;
int vertexCount = 3;
var color = Color.Green;
var regularPolygon = new RegularPolygon(center, radius, vertexCount, color);
var sw = new StringWriter();
var canvas = new TestCanvas(sw);
regularPolygon.Draw(canvas);
var expectedString = "Green line from (130, 100), to (85, 125,98076211353316)\r\n" +
"Green line from (85, 125,98076211353316), to (84,99999999999999, 74,01923788646684)\r\n" +
"Green line from (84,99999999999999, 74,01923788646684), to (130, 99,99999999999999)\r\n";
Assert.AreEqual(expectedString, sw.ToString());
}
public void Draw_WithRectangle_ShouldWriteDrawingInfo()
{
var leftTop = new Point(3, 5);
var rightBottom = new Point(10, 3);
var color = Color.Green;
var rectangle = new Rectangle(leftTop, rightBottom, color);
var sw = new StringWriter();
var canvas = new TestCanvas(sw);
rectangle.Draw(canvas);
var expectedString = "Green line from (3, 5), to (10, 5)\r\n" +
"Green line from (10, 5), to (10, 3)\r\n" +
"Green line from (10, 3), to (3, 3)\r\n" +
"Green line from (3, 3), to (3, 5)\r\n";
Assert.AreEqual(expectedString, sw.ToString());
}
public void CanDrawRectangle()
{
var leftTop = new Point(0, 6);
var rightBottom = new Point(2, 0);
var color = Color.Red;
var rectangle = new Rectangle(leftTop, rightBottom, color);
TestCanvas canvas = new TestCanvas();
var rightTop = new Point(rightBottom.X, leftTop.Y);
var leftBottom = new Point(leftTop.X, rightBottom.Y);
canvas.ExpectedData.Add($"{leftTop} {rightTop}");
canvas.ExpectedData.Add($"{rightTop} {rightBottom}");
canvas.ExpectedData.Add($"{rightBottom} {leftBottom}");
canvas.ExpectedData.Add($"{leftBottom} {leftTop}");
rectangle.Draw(canvas);
}
public void CanDrawRegularPolygon()
{
var vertexCount = 3;
var center = new Point(4, 4);
var radius = 3;
var color = Color.Red;
var regularPolygon = new RegularPolygon(vertexCount, center, radius, color);
TestCanvas canvas = new TestCanvas();
var angle = 360f / vertexCount;
var vertex1 = GetVertexByAngle(angle * 0);
for (var i = 1; i < vertexCount; ++i)
{
var vertex2 = GetVertexByAngle(angle * i);
canvas.ExpectedData.Add($"{vertex1} {vertex2}");
vertex1 = vertex2;
}
regularPolygon.Draw(canvas);
}
public PixelOffsetTransforms()
{
HorizontalContentAlignment = HorizontalAlignment.Stretch;
Spacing = 5;
var canvas = new TestCanvas();
var offsetMode = new EnumDropDown <PixelOffsetMode>();
offsetMode.SelectedValueBinding.Bind(canvas, c => c.PixelOffsetMode);
var testDropDown = new DropDown();
testDropDown.ItemTextBinding = Binding.Property((TestInfo t) => t.Name);
testDropDown.SelectedValueBinding.Cast <TestInfo>().Bind(canvas, c => c.Test);
testDropDown.DataStore = tests;
testDropDown.SelectedIndex = 0;
var options = new StackLayout
{
Orientation = Orientation.Horizontal,
VerticalContentAlignment = VerticalAlignment.Center,
Spacing = 5,
Padding = new Padding(10),
Items =
{
"PixelOffsetMode",
offsetMode,
"Test",
testDropDown
}
};
Items.Add(options);
Items.Add(new StackLayoutItem(canvas, true));
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(TestCanvas obj)
{
return (obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr;
}
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(TestCanvas obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}