public virtual sw.Size MeasureOverride(sw.Size constraint, Func <sw.Size, sw.Size> measure)
{
// enforce eto-style sizing to wpf controls
var size = UserPreferredSize;
var control = ContainerControl;
// Constrain content to the preferred size of this control, if specified.
var desired = measure(constraint.IfInfinity(size.InfinityIfNan()));
// Desired size should not be smaller than default (minimum) size.
// ensures buttons, text box, etc have a minimum size
var defaultSize = DefaultSize.ZeroIfNan();
desired = desired.Max(defaultSize);
// Desired should also not be bigger than default size if we have no constraint.
// Without it, controls like TextArea, GridView, etc will grow to their content.
if (double.IsInfinity(constraint.Width) && defaultSize.Width > 0)
{
desired.Width = PreventUserResize ? defaultSize.Width : Math.Max(defaultSize.Width, desired.Width);
}
if (double.IsInfinity(constraint.Height) && defaultSize.Height > 0)
{
desired.Height = PreventUserResize ? defaultSize.Height : Math.Max(defaultSize.Height, desired.Height);
}
// use the user preferred size, and ensure it's not larger than available size
size = size.IfNaN(desired);
size = size.Min(constraint);
// restrict to the min/max sizes
size = size.Max(control.GetMinSize());
size = size.Min(control.GetMaxSize());
return(size);
}
protected virtual void SetSize()
{
// this is needed so that the control doesn't actually grow when its content is too large.
// For some reason, MeasureOverride is not sufficient alone to tell WPF what size the control should be.
// for example, when a TextBox has a large amount of text, we do not grow the text box to fit that content in Eto's sizing model.
// ideally, this should be removed, but may require overriding ArrangeOverride on all controls as well.
// see the ControlTests.ControlsShouldHaveSaneDefaultWidths unit test for repro of the issue.
var defaultSize = DefaultSize.ZeroIfNan();
if (XScale && Control.IsLoaded)
{
ContainerControl.Width = double.NaN;
ContainerControl.MinWidth = 0;
}
else
{
var containerWidth = PreventUserResize && double.IsNaN(UserPreferredSize.Width)
? defaultSize.Width <= 0
? double.NaN
: defaultSize.Width
: UserPreferredSize.Width;
ContainerControl.Width = Math.Max(containerWidth, parentMinimumSize.Width);
ContainerControl.MinWidth = Math.Max(0, double.IsNaN(UserPreferredSize.Width) ? defaultSize.Width : UserPreferredSize.Width);
}
if (YScale && Control.IsLoaded)
{
ContainerControl.Height = double.NaN;
ContainerControl.MinHeight = 0;
}
else
{
var containerHeight = PreventUserResize && double.IsNaN(UserPreferredSize.Height)
? defaultSize.Height <= 0
? double.NaN
: defaultSize.Height
: UserPreferredSize.Height;
ContainerControl.Height = Math.Max(containerHeight, parentMinimumSize.Height);
ContainerControl.MinHeight = Math.Max(0, double.IsNaN(UserPreferredSize.Height) ? defaultSize.Height : UserPreferredSize.Height);
}
}