static public NSLayoutConstraint [] FromVisualFormat (string format, NSLayoutFormatOptions formatOptions, params object [] viewsAndMetrics)
{
NSMutableDictionary views = null, metrics = null;
var count = viewsAndMetrics.Length;
if (count != 0){
if ((count % 2) != 0)
throw new ArgumentException ("You should provide pairs and values, the parameter passed is not even", "viewsAndMetrics");
for (int i = 0; i < count; i+=2){
var key = viewsAndMetrics [i];
NSString nskey;
if (key is string)
nskey = new NSString ((string)key);
else if (key is NSString)
nskey = (NSString) key;
else
throw new ArgumentException (String.Format ("Item at {0} is not a string or an NSString", i), "viewsAndMetrics");
var value = viewsAndMetrics [i+1];
if (value is View){
if (views == null)
views = new NSMutableDictionary ();
views [nskey] = (NSObject) value;
continue;
} else if (value is INativeObject && Messaging.bool_objc_msgSend_IntPtr (((INativeObject) value).Handle, Selector.GetHandle ("isKindOfClass:"), Class.GetHandle (typeof (View)))) {
if (views == null)
views = new NSMutableDictionary ();
views.LowlevelSetObject (((INativeObject) value).Handle, nskey.Handle);
continue;
}
#if !MONOMAC
// This requires UILayoutSupport class which is not exist on Mac
else if (value is INativeObject && Messaging.bool_objc_msgSend_IntPtr (((INativeObject) value).Handle, Selector.GetHandle ("conformsToProtocol:"), Protocol.GetHandle (typeof (UILayoutSupport).Name))) {
if (views == null)
views = new NSMutableDictionary ();
views.LowlevelSetObject (((INativeObject) value).Handle, nskey.Handle);
continue;
}
#endif // !MONOMAC
var number = AsNumber (value);
if (number == null)
throw new ArgumentException (String.Format ("Item at {0} is not a number or a view", i+1), "viewsAndMetrics");
if (metrics == null)
metrics = new NSMutableDictionary ();
metrics [nskey] = number;
}
}
if (views == null)
throw new ArgumentException ("You should at least provide a pair of name, view", "viewAndMetrics");
return FromVisualFormat (format, formatOptions, metrics, views);
}
public static NSLayoutConstraint[] Constraint(string format, NSLayoutFormatOptions options, NSDictionary metrics, NSDictionary views)
{
foreach (var entry in views)
{
var v = entry.Value as UIView;
if (v != null)
{
v.TranslatesAutoresizingMaskIntoConstraints = false;
}
}
;
return(NSLayoutConstraint.FromVisualFormat(
format: format,
formatOptions: options,
metrics: metrics,
views: views
));
}
public static NSLayoutConstraint [] StackVertical(float padding, NSLayoutFormatOptions options, params NSView [] views)
{
return(NSLayoutExtensions.Stack(StackOrientation.Vertical, padding, options, views));
}
static NSLayoutConstraint [] Stack(StackOrientation orientation, float padding, NSLayoutFormatOptions options, params NSView [] views)
{
var names = views.Select((view, index) => $"{view.Identifier}__{index}");
var orientIndicator = orientation == StackOrientation.Horizontal ? "H:" : "V:";
var separator = padding < 0 ? "-" : $"-({padding})-";
var vfl = string.Join(separator, names.Select(name => $"[{name}]"));
var objects = new List <object> ();
for (var i = 0; i < views.Length; i++)
{
objects.Add(names.ElementAt(i));
objects.Add(views [i]);
}
return(NSLayoutConstraint.FromVisualFormat(orientIndicator + vfl, options, objects.ToArray()));
}
public static NSLayoutConstraint [] VerticalSpaceBetween(NSView topView, NSView bottomView, NSLayoutFormatOptions options, NSLayoutPriority priority)
{
return(NSLayoutConstraint.FromVisualFormat($"V:[top]-(>=0@{(float)priority})-[bottom]", options, "top", topView, "bottom", bottomView));
}
public static NSLayoutConstraint [] VerticalSpaceBetween(NSView topView, NSView bottomView, NSLayoutFormatOptions options)
{
return(NSLayoutConstraint.FromVisualFormat("V:[top]-(>=0)-[bottom]", options, "top", topView, "bottom", bottomView));
}
public static NSLayoutConstraint [] HorizontalSpaceBetween(NSView leftView, NSView rightView, NSLayoutFormatOptions options)
{
return(NSLayoutConstraint.FromVisualFormat("[left]-(>=0)-[right]", options, "left", leftView, "right", rightView));
}
static public NSLayoutConstraint [] FromVisualFormat(string format, NSLayoutFormatOptions formatOptions, params object [] viewsAndMetrics)
{
NSMutableDictionary views = null, metrics = null;
var count = viewsAndMetrics.Length;
if (count != 0)
{
if ((count % 2) != 0)
{
throw new ArgumentException("You should provide pairs and values, the parameter passed is not even", "viewsAndMetrics");
}
for (int i = 0; i < count; i += 2)
{
var key = viewsAndMetrics [i];
NSString nskey;
if (key is string)
{
nskey = new NSString((string)key);
}
else if (key is NSString)
{
nskey = (NSString)key;
}
else
{
throw new ArgumentException(String.Format("Item at {0} is not a string or an NSString", i), "viewsAndMetrics");
}
var value = viewsAndMetrics [i + 1];
if (value is View)
{
if (views == null)
{
views = new NSMutableDictionary();
}
views [nskey] = (NSObject)value;
continue;
}
else if (value is INativeObject && Messaging.bool_objc_msgSend_IntPtr(((INativeObject)value).Handle, Selector.GetHandle("isKindOfClass:"), Class.GetHandle(typeof(View))))
{
if (views == null)
{
views = new NSMutableDictionary();
}
views.LowlevelSetObject(((INativeObject)value).Handle, nskey.Handle);
continue;
}
#if !MONOMAC
// This requires UILayoutSupport class which is not exist on Mac
else if (value is INativeObject && Messaging.bool_objc_msgSend_IntPtr(((INativeObject)value).Handle, Selector.GetHandle("conformsToProtocol:"), Protocol.GetHandle(typeof(UILayoutSupport).Name)))
{
if (views == null)
{
views = new NSMutableDictionary();
}
views.LowlevelSetObject(((INativeObject)value).Handle, nskey.Handle);
continue;
}
#endif // !MONOMAC
var number = AsNumber(value);
if (number == null)
{
throw new ArgumentException(String.Format("Item at {0} is not a number or a view", i + 1), "viewsAndMetrics");
}
if (metrics == null)
{
metrics = new NSMutableDictionary();
}
metrics [nskey] = number;
}
}
if (views == null)
{
throw new ArgumentException("You should at least provide a pair of name, view", "viewAndMetrics");
}
return(FromVisualFormat(format, formatOptions, metrics, views));
}
public static AnyObject[] ConstraintsWithVisualFormat(string format, NSLayoutFormatOptions options, Dictionary <NSObject, AnyObject> metrics, Dictionary <NSObject, AnyObject> views)
{
return(default(AnyObject[]));
}
public static void AddUniversalConstraints(this UIView view, string format, NSLayoutFormatOptions options = default(NSLayoutFormatOptions), NSDictionary metrics = null, NSDictionary views = null)
{
view.AddConstraints(NSLayoutConstraint.FromVisualFormat(String.Format("H:{0}", format), options, metrics, views));
view.AddConstraints(NSLayoutConstraint.FromVisualFormat(String.Format("V:{0}", format), options, metrics, views));
}
public static void AddConstraints(this UIView view, string format, NSLayoutFormatOptions options, NSDictionary metrics, NSDictionary views)
{
view.AddConstraints(NSLayoutConstraint.FromVisualFormat(format, options, metrics, views));
}
//For adding a constraints between a single parent view and child view
public void AddConstraintToView(UIView parentView, UIView childView, string childViewName, string constraint, NSLayoutFormatOptions formatOptions)
{
var viewDictionary = NSDictionary.FromObjectsAndKeys(new NSObject[] { childView }, new NSObject[] { new NSString(childViewName) });
parentView.AddConstraints(NSLayoutConstraint.FromVisualFormat(constraint, formatOptions, new NSDictionary(), viewDictionary));
}
