| author | newuser |
| Mon, 19 Apr 2010 15:00:57 -0700 | |
| changeset 306 | 42f09aa2b24a |
| parent 230 | 7848c135d915 |
| permissions | -rw-r--r-- |
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<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html lang="en" xml:lang="en"> |
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<head> |
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<meta content="text/html; charset=utf-8" http-equiv="Content-Type" /> |
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<meta name="copyright" content="(C) Copyright 2005" /> |
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<meta name="DC.rights.owner" content="(C) Copyright 2005" /> |
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<meta content="concept" name="DC.Type" /> |
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<meta name="DC.Title" content="Using text entry controls" /> |
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<meta scheme="URI" name="DC.Relation" content="WRTKit_Common_WRTKit_tasks-GUID-24870895-4449-4307-9a54-7c90f7b3905e.html" /> |
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<meta content="XHTML" name="DC.Format" /> |
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<meta content="GUID-76AEB0E3-698D-41DE-A34B-8FEA6D8E00D2" name="DC.Identifier" /> |
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<meta content="en" name="DC.Language" /> |
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<link href="commonltr.css" type="text/css" rel="stylesheet" /> |
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<title> |
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Using text entry controls</title> |
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</head> |
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<body id="GUID-76AEB0E3-698D-41DE-A34B-8FEA6D8E00D2"><a name="GUID-76AEB0E3-698D-41DE-A34B-8FEA6D8E00D2"><!-- --></a> |
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<h1 class="topictitle1"> |
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Using text entry controls</h1> |
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<div> |
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<p> |
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The WRTKit supports two controls for text entry: TextField for |
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a single line of text and TextArea for multiple lines of text. |
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The API for both controls is identical, except for the constructor. |
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The TextField can be created in masked mode, which is useful for |
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entry of text that should not be displayed (e.g. passwords). For |
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every character that is typed in masked mode, an asterisk is shown |
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instead in the text field. While a TextArea control can hold an |
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unlimited number of lines of text, its height (as number of rows |
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to display without scrolling) is specified when it is constructed. |
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</p> |
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<div class="fignone" id="GUID-76AEB0E3-698D-41DE-A34B-8FEA6D8E00D2__GUID-D4E1D422-DAB9-4F40-9A13-231B4ACF1FE5"><a name="GUID-76AEB0E3-698D-41DE-A34B-8FEA6D8E00D2__GUID-D4E1D422-DAB9-4F40-9A13-231B4ACF1FE5"><!-- --></a><span class="figcap">Figure 1. |
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TextField and TextArea controls</span> |
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<br /><img src="Text_Entry_Controls_Screenshot_1.png" /><br /> |
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</div> |
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<p> |
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TextField and TextArea controls are created and added to views like |
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any other controls in the WRTKit. The code assumes that a view has |
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already been created and that a variable called exampleView refers |
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to it. |
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</p> |
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<pre> |
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// create textfield |
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var nameField = new TextField("field1", "Enter your name");
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exampleView.addControl(nameField); |
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</pre> |
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<p> |
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"field1" is a unique identifier for the control and "Enter your |
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name" is the control caption. An optional third argument to the |
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constructor can be used to specify the text to display in the |
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control, however the text can also be set at any time later on using |
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the setText() method as follows: |
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</p> |
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<pre> |
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// set the text in the textfield |
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nameField.setText("John Smith");
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</pre> |
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<p> |
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The current text in a text entry control can be retrieved using the |
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getText() method: |
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</p> |
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<pre> |
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// get the current text from the textfield |
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var text = nameField.getText(); |
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</pre> |
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<p> |
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Text entry controls fire "TextChanged" events when a user edits the |
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text in a control. These events can be handled using by registering |
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an event listener to the control. The code below shows what a |
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typical callback function would look like: |
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</p> |
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<pre> |
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// Callback function for text changed events. |
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function nameChanged(event) {
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// implement what happens when the text changed here |
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} |
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</pre> |
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<p> |
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Registering the event listener function is done as follows, for |
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example right after the control was created: |
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</p> |
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<pre> |
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// register event listener |
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nameField.addEventListener("TextChanged", nameChanged);
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</pre> |
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</div> |
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<div> |
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<div class="familylinks"> |
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<div class="parentlink"><strong>Parent topic:</strong> <a href="WRTKit_Common_WRTKit_tasks-GUID-24870895-4449-4307-9a54-7c90f7b3905e.html">Common WRTKit tasks</a></div> |
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</div> |
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</body> |
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</html> |