"Creating a Stylish Window Shadow Effect for Your Adobe AIR HTML App

I created an HTML based AIR application with a transparent window that does not use system chrome. I utilized JavaScript and CSS3 to add a drop-shadow effect to the window, adjusting the shadow based on window focus. When the window is maximized, the shadow disappears entirely.

The visual representation of the application is shown in the wireframe diagram below:

The red section represents the <html> container itself. The blue box indicates the application content area (a basic <div>), while the black border with a green shadow represents a positioned absolute <div> acting as the application container in my design.

The black border surrounding the blue box features a subtle green shadow along the outer edges of the page.

An issue arises because AIR considers the <html> element as the application edge rather than the container <div> for the black border. This prevents the application from touching the screen's edge in AIR.

Do you have any suggestions on how to address this challenge? My initial thought was using complex JavaScript to offset the application somehow... Has anyone else encountered this problem before?

javascripthtmlcssair

Answer №1

It seems like there might be a misunderstanding of the question, or perhaps a limitation of AIR that I'm not aware of, but I don't see why the solution you're proposing would be difficult.

When the application window is moved using drag-and-drop, simply allowing it to stay where it's dropped without checking the "screen" bounds should suffice. If bounds need to be checked, users can be allowed to go off-bounds by the width of the border.

For maximizing the application window, offsetting the application container with negative values equal to the border width and giving the application itself (rather than its container) the width and height of the screen should work.

Since I currently can't test this as an AIR application, I've provided some code below for illustration purposes, which you can try out on jsfiddle. I've utilized jQuery to simplify the code. Does this align with what you had in mind?

HTML:

<div id="appContainer">
    <div id="app">
        <a id="maximize" href="#">Maximize</a>
    </div>
</div>

CSS: 

#appContainer {
    background-color: black;
    width: 106px;
    height: 106px;
    position: absolute;
}

#app {
    background-color: blue;
    width: 100px;
    height: 100px;
    margin: 3px;
}

Javascript:

$("#maximize").click(function(){
    var $app = $("#app");
    var $appContainer = $app.parent();
    var borderWidth = parseInt($app.css('margin'));
    $appContainer.offset({top: -borderWidth, left: -borderWidth});
    $app.width($(document).width());
    $app.height($(document).height());
});

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