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Vaadin 14 grid multi-line cells

I have quite long Strings in one column and I want to display them as multi-line cells in my grid.
I'm using Vaadin 14 + Java and I tried to set CSS-Style Class for the specific column:
Java-Code:
#CssImport("./styles/shared-styles.css")
public class RisikoGrid extends Grid<RisikoEntity> {
public RisikoGrid() {
setSizeFull();
// add the column to the grid
addColumn(Entity::getAttribute).setHeader("MyCol")
.setFlexGrow(10).setSortable(true).setKey("mycolumn");
// set CSS style class for the specific column
this.getColumnByKey("mycolumn").setClassNameGenerator(item -> {return "grid-mycol";});
}
}
CSS (shared-styles.css)
.grid-mycol{
background: red;
white-space: normal;
word-wrap: break-word;
}
While I do see the class-name when I use the inspector in my webbrowser (chrome), the css is not applied.
What do I need to change to make it work?
Edit: this is how my styles look like - and I can't even see the background:red for instance:

You can use the built-in wrap-cell-content theme variant to allow text to wrap inside the cells.
grid.addThemeVariants(GridVariant.LUMO_WRAP_CELL_CONTENT);
See the last example on https://vaadin.com/components/vaadin-grid/html-examples/grid-theme-demos – the texts there are not that long, but if you make your browsers window narrow enough you’ll see some of the addresses wrap on two lines.

I looked into why my css settings didn't show up in the inspector and the solution was a minimal change from:
#CssImport("./styles/shared-styles.css")
to
#CssImport(value = "./styles/shared-styles.css", themeFor = "vaadin-grid")
I'm guessing the component scope of the grid differs from the global CSS.
It works now.

JavaFX CSS change property of custom style class at runtime

Im very new to CSS since I was never working with weblanguages but for a JavaFX application I've got a css style sheet with a windows 10 UWP theme. The default style classes use the default windows grey button theme, but i also created a custom style class for colored components.
The colors are as variables in the the .root style class for the default style and are overwritten in the .colored style class for the colored style.
.root
{
-fill-color: #CCCCCC;
...
}
.colored
{
-fill-color: #DD2867;
...
}
I now want to change the colored style colors at runtime.
I know about Node#setStyle(String) in which i can modify the fill color with something like this:
root.setStyle("-fill-color: #FF00FF;");
but this has only an effect on the color in the .root style class and not the .colored style class.
Can you tell me a way to direcly modify a property of a style class at runtime or maybe an even better approach to use a default and a colored style?
Thanks in advance,
Eleom.

Define another looked-up color on the root node, and use it in your .colored class:
{
-fill-color: #CCCCCC;
-colored-fill: #DD2867 ;
...
}
.colored
{
-fill-color: -colored-fill;
...
}
Then you can change that color programmatically the same way:
root.setStyle("-colored-fill: ... ;");

JavaFX - edit or parse FX-CSS file programmatically

I am using JavaFX 8u60. I want to give my users the chance to edit a CSS file for a pane in my program, without using an external editor.
For example, the user clicks on a Label, and a dialog to select the color is shown. After the user selects the color, the color is actually written in the CSS file, in the appropriate line...
Are there CSS parsers for JavaFX?
I can't show you any Java code because I'm not sure this can be done.
.table-view .column-header .label{
-fx-font: 18 GatwickSans;
-fx-text-fill: red; //<--- user shall be able to edit this line from my program
-fx-alignment: TOP_LEFT;
}
edit: to clarify, I want to be able to edit a FX-CSS file from Java.

You can use color picker, Try this example
Hbox layout =new HBox(10);
ColorPicker colorPicker = new ColorPicker();
colorPicker.setValue(Color.RED);//Red is the default shown at first
Label label =new Label("Your Text");
layout.getChildren().addAll(label,colorPicker);
//Then
colorPicker.setOnAction(event->{
label.setFill(colorPicker.getValue());
});
Also for css
colorPicker.setOnAction(event->{
label.setStyle("-fx-text-fill: "+colorPicker.getValue()+";");
});

I have used CSSParser:
http://sourceforge.net/projects/cssparser/
It's sufficiently generic and it works a bit like the DOM XML parser. It reads the CSS file and maps it in memory, allowing you to read the single selectors, properties and values, and edit them. Check the discussion on Sourceforge to have some examples, since it lacks documentation.

Vaadin: Dynamically change a textfield's background color

How does one dynamically change a textfield's visual properties, say background color?
An example might be during a validation to modify the background color dependent on the value entered.

In your war (this will be inside WebContent if you are using ecilpse) have a file in this path VAADIN/themes/customrunno/styles.css (asuming you are using runno as your theme)
With this content:
#import url(../runo/styles.css);
.my_bg_style {
background: #99EE6B;
}
In your init method:
setTheme("customruno"); // same as the folder folder under VAADIN/themes
change your textfield background:
textField.addStyleName("my_bg_style"); // same as in styles.css
to remove the style just do:
textField.removeStyleName("my_bg_style");

Here is the sample
.v-textfield-dashing
{
border: thin dashed;
background: white; /* Has shading image by default */
}
Detailed information you will get on this link.
https://vaadin.com/book/-/page/components.textfield.html
And if you want to change textfield color dynamically then you will get content on below link
https://vaadin.com/wiki/-/wiki/Main/Dynamically%20injecting%20CSS

Not able to get SWT.UNDERLINE_LINK working in combination with StyledText and TextStyle

I am very new to using StyledText, TextStyle.
I am trying to give a hyperlink look for a text that is displayed. I am using TextStyle object to create a hyper link style text. For TextStyle constructor I am passing Font object which has the style SWT.UNDERLINE_LINK, expecting it to create a text with hyperlink style [as per javadoc].
I am not able get this style working. Other styles SWT.BOLD, SWT.ITALICS works but not SWT.UNDERLINE_LINK. Are there any special conditions to use SWT.UNDERLINE_LINK?

Check this Thread-
Can HTML-Style Links be added to SWT StyledText?
and
http://www.roseindia.net/tutorials/swt/create-link.shtml

You need to set
styleRange.underline = true;
when using the underlineStyle
styleRange.underlineStyle = SWT.UNDERLINE_LINK;