如何检测 CTRL + Flex 中的 C 输入和 F3 键输入

发布于 2024-11-19 20:05:15 字数 389 浏览 2 评论 0原文

我正在尝试在我的应用程序中实现查找功能，为此我正在尝试基于 F3 或 CTRL + F 等键盘输入打开查找弹出窗口。但是在 F3 上，它不会转到事件侦听器，而是打开默认的查找工具栏而是使用 Internet Explorer。有什么线索，我如何绕过它并在我的应用程序中使用 f3 ？

另一件事是如何在 Flex 中捕获 CTRL + F？

private function keyPressed(evt:KeyboardEvent):void
{
    if (evt.keyCode == Keyboard.F3)
    {
        //open popup
    } else {
        //do something elese
    }
}

谢谢。

原文

I am trying to implement find functionality in my application and for this I am trying to open a find popup based on keyboard inputs like F3 or CTRL + F. But on F3, instead of going to event listener, it opens up the default find toolbar of the Internet Explorer instead. Any clues, how I could bypass it and use f3 in my application?

Another thing is how do I capture CTRL + F in flex?

private function keyPressed(evt:KeyboardEvent):void
{
    if (evt.keyCode == Keyboard.F3)
    {
        //open popup
    } else {
        //do something elese
    }
}

Thanks.

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指尖微凉心微凉 2024-11-26 20:05:15

用于检测 CTRL + F：

event.ctrlKey == true && event.keyCode == Keyboard.F

其中“事件”当然是 KeyBoardEvent。

至于F3问题：只要Flash应用程序具有焦点，您编写的代码就可以工作。 F3 键命令也不会被路由到浏览器。因此，您需要做的是确保当用户按 F3 时您的应用程序获得焦点。如何解决这个问题取决于您的 JavaScript 实现。
您可以使用ExternalInterface 告诉浏览器应用程序已准备就绪，然后将注意力集中在应用程序上。或者在 Javascript 中，您可以捕获键盘事件，阻止其默认行为，然后调用 Flash 应用程序上的函数（再次通过ExternalInterface）。

为了帮助您入门，这里有一个用于防止默认 F3 行为的 JQuery 片段：

$('body').keyup(function(event) {
    if (event.keyCode == '114') event.preventDefault();
}

For detecting CTRL + F:

event.ctrlKey == true && event.keyCode == Keyboard.F

where 'event' is of course a KeyBoardEvent.

As for the F3 question: the code you wrote will work as long as the flash application has focus. The F3 key command will then also not be routed to the browser. So what you need to do, is make sure that your application has focus when the user hits F3. How you solve this will depend on your JavaScript implementation.
You could use ExternalInterface to tell the browser that the app is ready and than focus on the app. Or in Javascript you could catch the keyboard event, prevent its default behavior, and then call the function on the Flash app (again through ExternalInterface).

To get you started, here's a little JQuery snippet for preventing the default F3 behaviour:

$('body').keyup(function(event) {
    if (event.keyCode == '114') event.preventDefault();
}

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寄意 2024-11-26 20:05:15

这是对你的第二个问题的回应，顺便说一句，这个问题可能应该在一个完全独立的问题中提出。

该解决方案将允许您测试所需数量的按键组合。它将按下的键存储在数组中，并再次测试该数组以确定组合。

package
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.ui.Keyboard;

    public class MultiKeyHandlerApp extends Sprite
    {
        protected var keyCodes:Array;

        public function MultiKeyHandlerApp()
        {
            keyCodes = [];
            stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDownHandler );
            stage.addEventListener(KeyboardEvent.KEY_UP, onKeyUpHandler );
        }

        protected function onKeyDownHandler( event:KeyboardEvent ):void 
        {
            addKey( event.keyCode );    

                    // -- 65 = a, 83 = s, 68 = d
            if( hasKey( 65 ) && hasKey( 83 ) && hasKey( 68 ) )
            {
                trace( "match!" );  
            }
        }

        protected function onKeyUpHandler( event:KeyboardEvent ):void 
        {
            removeKey( event.keyCode );
        }

        protected function addKey( keyCode:int ):void 
        {
            if( keyCodes.indexOf( keyCode ) < 0 ) keyCodes.push( keyCode );
        }

        protected function removeKey( keyCode:int ):void 
        {
            var index:int = keyCodes.indexOf( keyCode );
            if( index > -1 ) keyCodes.splice( index, 1 );
        }

        protected function hasKey( keyCode:int ):Boolean 
        {
            return keyCodes.indexOf( keyCode ) >= 0;
        }
    }
}

This is in response to your second question, which by the way, should probably be asked in a completely separate question.

This solution will allow you to test for as many key combinations as you need. It stores the pressed keys in an array and tests agains the array to determine combinations.

package
{
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.ui.Keyboard;

    public class MultiKeyHandlerApp extends Sprite
    {
        protected var keyCodes:Array;

        public function MultiKeyHandlerApp()
        {
            keyCodes = [];
            stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDownHandler );
            stage.addEventListener(KeyboardEvent.KEY_UP, onKeyUpHandler );
        }

        protected function onKeyDownHandler( event:KeyboardEvent ):void 
        {
            addKey( event.keyCode );    

                    // -- 65 = a, 83 = s, 68 = d
            if( hasKey( 65 ) && hasKey( 83 ) && hasKey( 68 ) )
            {
                trace( "match!" );  
            }
        }

        protected function onKeyUpHandler( event:KeyboardEvent ):void 
        {
            removeKey( event.keyCode );
        }

        protected function addKey( keyCode:int ):void 
        {
            if( keyCodes.indexOf( keyCode ) < 0 ) keyCodes.push( keyCode );
        }

        protected function removeKey( keyCode:int ):void 
        {
            var index:int = keyCodes.indexOf( keyCode );
            if( index > -1 ) keyCodes.splice( index, 1 );
        }

        protected function hasKey( keyCode:int ):Boolean 
        {
            return keyCodes.indexOf( keyCode ) >= 0;
        }
    }
}

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