cursor-position | 易学教程

Cursor position in a textarea (character index, not x/y coordinates)

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问题 How can I get the caret\'s position in a textarea using jQuery? I\'m looking for the cursor\'s offset from the start of the text, not for the (x, y) position. 回答1: Not jQuery, but just Javascript... var position = window.getSelection().getRangeAt(0).startOffset; 回答2: Modified BojanG's solution to work with jQuery. Tested in Chrome, FF, and IE. (function ($, undefined) { $.fn.getCursorPosition = function() { var el = $(this).get(0); var pos = 0; if('selectionStart' in el) { pos = el

How do I find the position of a cursor in a text box? C#

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问题 I have a standard WinForms TextBox and I want to insert text at the cursor\'s position in the text. How can I get the cursor\'s position? Thanks 回答1: Regardless of whether any text is selected, the SelectionStart property represents the index into the text where you caret sits. So you can use String.Insert to inject some text, like this: myTextBox.Text = myTextBox.Text.Insert(myTextBox.SelectionStart, "Hello world"); 回答2: You want to check the SelectionStart property of the TextBox . 回答3:

How to find cursor position in a contenteditable DIV?

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问题 I am writing a autocompleter for a content editable DIV (need to render html content in the text box. So preferred to use contenteditable DIV over TEXTAREA). Now I need to find the cursor position when there is a keyup/keydown/click event in the DIV. So that I can insert the html/text at that position. I am clueless how I can find it by some computation or is there a native browser functionality that would help me find the cursor position in a contententeditable DIV. 回答1: If all you want to

Getting RGB value from under mouse cursor

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问题 I am trying to build a program that detects the color that is under the mouse cursor and then displays the color and RGB values in a window on the screen. I am VERY new to Java so do not know much of anything. I have two codes I have worked on, with help from a friend, The first one gets the RGB values of a specific coordinate of a buffered image, and the other takes user defined RGB values and shows a pane with the color in it. My question is \"how do I get the program to detect the color

Get contentEditable caret index position

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问题 I\'m finding tons of good, crossbrowser anwers on how to SET the cursor or caret index position in a contentEditable element, but none on how to GET or find its index... What I want to do is know the index of the caret within this div, on keyup . So, when the user is typing text, I can at any point know its cursor\'s index within the contentEditable element. EDIT: I\'m looking for the INDEX within the div contents (text), not the cursor coordinates. <div id=\"contentBox\" contentEditable=\

How to move cursor to end of contenteditable entity

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问题 I need to move caret to end of contenteditable node like on Gmail notes widget. I read threads on StackOverflow, but those solutions are based on using inputs and they doesn\'t work with contenteditable elements. 回答1: There is also another problem. The Nico Burns's solution works if the contenteditable div doesn't contain other multilined elements. For instance, if a div contains other divs, and these other divs contain other stuff inside, could occur some problems. In order to solve them, I

Set cursor position on contentEditable <div>

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问题 I am after a definitive, cross-browser solution to set the cursor/caret position to the last known position when a contentEditable=\'on\' <div> regains focus. It appears default functionality of a content editable div is to move the caret/cursor to the beginning of the text in the div each time you click on it, which is undesirable. I believe I would have to store in a variable the current cursor position when they are leaving focus of the div, and then re-set this when they have focus inside

How to set caret(cursor) position in contenteditable element (div)?

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问题 I have this simple HTML as an example: <div id=\"editable\" contenteditable=\"true\"> text text text<br> text text text<br> text text text<br> </div> <button id=\"button\">focus</button> I want simple thing - when I click the button, I want to place caret(cursor) into specific place in the editable div. From searching over the web, I have this JS attached to button click, but it doesn\'t work (FF, Chrome): var range = document.createRange(); var myDiv = document.getElementById(\"editable\");

Cursor position in a textarea (character index, not x/y coordinates)

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How can I get the caret's position in a textarea using jQuery? I'm looking for the cursor's offset from the start of the text, not for the (x, y) position . Not jQuery, but just Javascript... var position = window.getSelection().getRangeAt(0).startOffset; Ryan Modified BojanG's solution to work with jQuery. Tested in Chrome, FF, and IE. (function ($, undefined) { $.fn.getCursorPosition = function() { var el = $(this).get(0); var pos = 0; if('selectionStart' in el) { pos = el.selectionStart; } else if('selection' in document) { el.focus(); var Sel = document.selection.createRange(); var