Question

早些时候我正在努力水平移动Carat现在我需要将它向上移动＆amp;在文本字段中。这适用于虚拟键盘，因此所有箭头控件都使用编码按钮完成。

下面是一个例子：我有一个文本字段，其中包含两行文本变量，而我们的克拉位于底线的末尾。我的目标是将克拉移动到第一行的末尾。

var boop = textSelect.text.length;
var snoop = boop;

// arrow controls to move left and right
function larw(event:MouseEvent):void
{
    snoop -=  1;
    stage.focus = textSelect;
    textSelect.setSelection( snoop,snoop);
}

function rarw(event:MouseEvent):void
{
    snoop +=  1;
    stage.focus = textSelect;
    textSelect.setSelection( snoop,snoop);
}

// moving up 
function uarw(event:MouseEvent):void
{

}

Answer 1

可能有一种更简单，更优雅的方式来做到这一点，但这是我能想到的，应该足以让你开始:(为移动插入符号）

var line:int = textSelect.getLineIndexOfChar(textSelect.caretIndex); //get the current line the caret is in

    //if the line isn't already at the top-most line
if(line > 0){
    var charBounds:Rectangle = textSelect.getCharBoundaries(textSelect.caretIndex); //get the coordinates of the current caret position
    var prevLinePos:Number = charBounds.y - textSelect.getLineMetrics(line-1).leading - (textSelect.getLineMetrics(line-1).height * .5); //the y value of the middle of the previous line

    var newIndex:Number = textSelect.getCharIndexAtPoint(charBounds.x,prevLinePos); //get the character that is closest to that position

    textSelect.setSelection(newIndex,newIndex); //set the caret
}

用as3垂直控制克拉

1 个答案: