WPF bubbling events and tunneling events

Bubbling event: MouseMove, the order in which the control events are triggered: from top to bottom

Tunneling events: Previewmousemove, triggering the order of control events: from the bottom to the top

Bubbling event: MouseMove

<border x:name= "Greenborder" background= "Green" width= "horizontalalignment=" "Right" mousemove= "GreenBorder_ MouseMove ">
<border x:name= "Redborder" background= "Red" width= "+" height= "" mousemove= "" Redborder_mousemove "></ Border>
</Border>

Background code:

        Private voidLowerborder_mousemove (Objectsender, MouseEventArgs e) {            if(E.leftbutton = =mousebuttonstate.pressed) {Text1. Text+="Lower Border x:"+ E.getposition ( This). X +"y:"+ E.getposition ( This). Y +"\ r \ n"; }        }        Private voidTopborder_mousemove (Objectsender, MouseEventArgs e) {            if(E.leftbutton = =mousebuttonstate.pressed) {Text1. Text+="Top Border x:"+ E.getposition ( This). X +"y:"+ E.getposition ( This). Y +"\ r \ n"; //set Handled=true to block execution of Lowerborder_mousemove eventse.handled =true; }        }

View Code

Tunnel Event: Previewmousemove

<border x:name= "Lowerborder" background= "Green" width= "horizontalalignment=" "Right" previewmousemove= " Lowerborder_previewmousemove ">
<border x:name= "Topborder" background= "Red" width= "+" height= "previewmousemove=" Topborder_ Previewmousemove "></Border>
</Border>

//perform the Lowerborder event first        Private voidLowerborder_previewmousemove (Objectsender, MouseEventArgs e) {            if(E.leftbutton = =mousebuttonstate.pressed) {Text1. Text+="Lower Border x:"+ E.getposition ( This). X +"y:"+ E.getposition ( This). Y +"\ r \ n"; }        }        //after performing the Topborder event        Private voidTopborder_previewmousemove (Objectsender, MouseEventArgs e) {            if(E.leftbutton = =mousebuttonstate.pressed) {Text1. Text+="Top Border x:"+ E.getposition ( This). X +"y:"+ E.getposition ( This). Y +"\ r \ n"; }        }

View Code

WPF bubbling events and tunneling events