Adding Cascading Style Sheets (CSS) on our apps

JavaFX Cascading Style Sheets (CSS) is based on the W3C CSS version 2.1 [1] with some additions from current work on version 3 [2]. JavaFX CSS also has some extensions to CSS in support of specific JavaFX features. The goal for JavaFX CSS is to allow web developers already familiar with CSS for HTML to use CSS to customize and develop themes for JavaFX controls and scene graph objects in a natural way. The JavaFX CSS support and extensions have been designed to allow JavaFX CSS style sheets to be parsed cleanly by any compliant CSS parser, even though it might not support JavaFX extensions. This enables the mixing of CSS styles for JavaFX and for other purposes (such as for HTML pages) into a single style sheet. To this end, all JavaFX property names have been prefixed with a vendor extension of “-fx-“. Even properties that might seem to be compatible with standard HTML CSS have been prefixed, because JavaFX has somewhat different semantics for their values.

JavaFX CSS does not support CSS layout properties such as floatpositionoverflow, and width. However, the CSS padding and margins properties are supported on some JavaFX scene graph objects. All other aspects of layout are handled programmatically in JavaFX code. In addition, CSS support for HTML-specific elements such as Tables are not supported since there is no equivalent construct in JavaFX.

JavaFX has a rich set of extensions to CSS in support of features such as color derivation, property lookup, and multiple background colors and borders for a single node. These features add significant new power for developers and designers and are described in detail in this document.

Time to add some style to our applications . We already know how the view-controller model works. But now lets take one more step using Cascading Style Sheets with our aplications.

Look my aplication, a easy example where you can add data and display it at TableView:

Remember to take a look to JavaFx References:

https://docs.oracle.com/javafx/2/api/javafx/scene/doc-files/cssref.html#

Here you can try this code:

https://github.com/RayRT/AplicacionAlumnos.git

Without .Css :

And now apply Style:

First of all, create new css file, here i just create a new package for styles .

When we work on big projects, it will be important to have an organized resource tree, class, controllers, views, styles…

To correctly load the styles when starting, we must indicate the location from the main program with the line:

scene,getSylesheets().add(“/*path.css”);

Definition of styles:
-We must differentiate if we want a series of characteristics to be applied at the class level (individually) or at a general level (all labels, for example).
In case we want to apply a style to a specific item we can identify it from JavaFx Builder in the following way:

We can also assign different styles directly from here:

But now lets use the importante path : code .


Lets see:

<font-size> The size of the font, using the <size> syntax.

<alignment> to align the text content.

<text-fill> text font color , in this case when you put the mouse over the menu (focused) text color change to white(#fff).

With .label{} style apply with all labels.

<font-family> Change the type of font to use.

<padding> just add 5px padding

<border-color> change the border color.

As you can see, all you need is to specify item, then add your changes.

Also can choose when you want to display the style ,(holder, focused..).

Acerca del autor: Start2Develop

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