public void EmptyStarColumnInfiniteWidthMeasure()
{
var grid = CreateGridLayout(rows: "auto", columns: $"*");
var manager = new GridLayoutManager(grid);
var measuredSize = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.Equal(0, measuredSize.Width);
}
public void EmptyStarRowInfiniteHeightMeasure()
{
var grid = CreateGridLayout(rows: "*", columns: $"auto");
var manager = new GridLayoutManager(grid);
var measuredSize = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.Equal(0, measuredSize.Height);
}
Size MeasureAndArrange(IGridLayout grid, double widthConstraint = double.PositiveInfinity, double heightConstraint = double.PositiveInfinity)
{
var manager = new GridLayoutManager(grid);
var measuredSize = manager.Measure(widthConstraint, heightConstraint);
manager.ArrangeChildren(new Rectangle(Point.Zero, measuredSize));
return(measuredSize);
}
public Size Measure(double widthConstraint, double heightConstraint)
{
// We have to rebuild this every time because the StackLayout contents
// and values may have changed
_gridLayout?.Clear();
_gridLayout = Gridify(_stackLayout);
_manager = new GridLayoutManager(_gridLayout);
return(_manager.Measure(widthConstraint, heightConstraint));
}
public void StarColumnWithViewInfiniteWidthMeasure()
{
var grid = CreateGridLayout(rows: "auto", columns: $"*");
var view0 = CreateTestView(new Size(100, 50));
AddChildren(grid, view0);
SetLocation(grid, view0);
var manager = new GridLayoutManager(grid);
var measuredSize = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.Equal(100, measuredSize.Width);
Assert.Equal(50, measuredSize.Height);
}
public void CanSpanAbsoluteRows()
{
var grid = CreateGridLayout(rows: "100,100", columns: "auto");
var view0 = CreateTestView(new Size(100, 150));
AddChildren(grid, view0);
SetLocation(grid, view0, rowSpan: 2);
var manager = new GridLayoutManager(grid);
manager.Measure(100, 200);
manager.ArrangeChildren(new Rectangle(0, 0, 100, 200));
// View should be arranged to span both rows (200 points)
AssertArranged(view0, 0, 0, 100, 200);
}
public void MeasureTwoColumnsWithSpacing()
{
var grid = CreateGridLayout(columns: "100, 100", colSpacing: 10);
var view0 = CreateTestView(new Size(100, 100));
var view1 = CreateTestView(new Size(100, 100));
AddChildren(grid, view0, view1);
SetLocation(grid, view0);
SetLocation(grid, view1, col: 1);
var manager = new GridLayoutManager(grid);
var measure = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
Assert.Equal(100 + 100 + 10, measure.Width);
}
public void ColumnSpacingForEmptyColumns()
{
var grid = CreateGridLayout(columns: "100, auto, 100", colSpacing: 10);
var view0 = CreateTestView(new Size(100, 100));
var view2 = CreateTestView(new Size(100, 100));
AddChildren(grid, view0, view2);
SetLocation(grid, view0);
SetLocation(grid, view2, col: 2);
var manager = new GridLayoutManager(grid);
var measure = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
// Because the auto column has no content, we expect it to have height zero
// and we expect that it won't add more row spacing
Assert.Equal(100 + 100 + 10, measure.Width);
}
public void EmptyAutoColumnsHaveNoWidth()
{
var grid = CreateGridLayout(columns: "100, auto, 100");
var view0 = CreateTestView(new Size(100, 100));
var view2 = CreateTestView(new Size(100, 100));
AddChildren(grid, view0, view2);
SetLocation(grid, view0);
SetLocation(grid, view2, col: 2);
var manager = new GridLayoutManager(grid);
var measure = manager.Measure(double.PositiveInfinity, double.PositiveInfinity);
manager.ArrangeChildren(new Rectangle(0, 0, measure.Width, measure.Height));
// Because the auto column has no content, we expect it to have width zero
Assert.Equal(100 + 100, measure.Width);
// Verify the offset for the third column
AssertArranged(view2, 100, 0, 100, 100);
}
