Silverlight custom Layout container

The so-called layout containers in Silverlight are actuallyInherited fromPanelClassAnd then rewrite the two methods:

Measureoverride: Size of the calculated element to be rendered

Arrangeoverride: Rendering elements at specific locations

 

Demo:

Using system; using system. componentmodel; using system. windows; using system. windows. controls; using system. windows. threading; namespace layoutdemo {public class testpanel2: Panel {public testpanel2 () {} protected override size measureoverride (size availablesize) {foreach (uielement element in base. children) {element. measure (availablesize);} return base. measureoverride (availablesize);} protected Override size arrangeoverride (size finalsize) {Switch (this. ori) {Case orientation. horizontal: {double num = finalsize. height; foreach (uielement element in base. children) {num-= element. desiredsize. height; element. arrange (New rect (0.0, num, finalsize. width, element. desiredsize. height);} break;} case orientation. vertical: {double num2 = finalsize. width; foreach (uielement element in base. Children) {num2-= element. desiredsize. width; element. arrange (New rect (num2, 0.0, element. desiredsize. width, finalsize. height);} break;} return base. arrangeoverride (finalsize);} protected static void onlayoutchanged (dependencyobject sender, dependencypropertychangedeventargs ARGs) {testpanel2 base2 = sender as testpanel2; If (base2! = NULL) {base2.refleshupdate () ;}} public void refleshupdate () {double num = base. actualwidth. Equals (double. Nan )? Base. desiredsize. Width: Base. actualwidth; double num2 = base. actualheight. Equals (double. Nan )? Base. desiredsize. height: base. actualheight; this. arrangeoverride (new size (Num, num2);} public orientation Ori {get {return (orientation) getvalue (oriproperty);} set {setvalue (oriproperty, value );}} public static readonly dependencyproperty oriproperty = dependencyproperty. register ("Ori", typeof (orientation), typeof (testpanel), new propertymetadata (orientation. horizontal, onvaluechaged); P Rivate static void onvaluechaged (dependencyobject sender, dependencypropertychangedeventargs e) {testpanel2 Panel = sender as testpanel2; If (panel! = NULL) {panel. refleshupdate ();}}}}