ScrollBar parts css information
In the above picture there are four main part of ScrollBar .
increment thumb track decrement
Now in this post we are going to just play with only these four style class and at the right of the image above there are some of the events like hover(focus), pressed(mouse pressed) , horizontal(Horizontal specific ScrollBar CSS class) and vertical (Vertical specific ScrollBar CSS class) .
Firstly we are making one demo Application which contain ListView and one Stylesheet .
| 01 | <?xml version="1.0" encoding="UTF-8"?> |
| 02 |
| 03 | <?import java.lang.*?> |
| 04 | <?import java.net.*?> |
| 05 | <?import java.util.*?> |
| 06 | <?import javafx.scene.control.*?> |
| 07 | <?import javafx.scene.layout.*?> |
| 08 | <?import javafx.scene.paint.*?> |
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In above FXML we have created two listview with style class naming mylistview. Now we will be using same style class on all over our stylesheets (style.css) Let’s make the scrollbar like below:
Css file (style.css)
| 01 | /** CSS **/ |
| 02 | .mylistview{ |
| 03 | -fx-border-color:derive(gray,80%); |
| 04 | } |
| 05 |
| 06 | /* The main scrollbar CSS class of ListView */ |
| 07 | .mylistview .scroll-bar:horizontal , |
| 08 | .mylistview .scroll-bar:vertical{ |
| 09 | -fx-background-color:transparent; |
| 10 |
| 11 | } |
| 12 |
| 13 | /* The increment and decrement button CSS class of scrollbar */ |
| 14 | .mylistview .increment-button ,.mylistview .decrement-button { |
| 15 | -fx-background-color:transparent; |
| 16 | -fx-border-color:derive(gray,80%); |
| 17 | } |
| 18 |
| 19 | /* The main scrollbar **track** CSS class */ |
| 20 | .mylistview .scroll-bar:horizontal .track , |
| 21 | .mylistview .scroll-bar:vertical .track{ |
| 22 | -fx-background-color: transparent; |
| 23 | -fx-border-color:derive(gray,80%); |
| 24 | -fx-background-radius: 0em; |
| 25 | } |
| 26 |
| 27 | /* The main scrollbar **thumb** CSS class which we drag every time (movable) */ |
| 28 | .mylistview .scroll-bar:horizontal .thumb, |
| 29 | .mylistview .scroll-bar:vertical .thumb { |
| 30 | -fx-background-color:derive(black,90%); |
| 31 | -fx-background-insets: 0, 0, 0; |
| 32 | -fx-background-radius: 0em; |
| 33 |
| 34 | } |
| 35 |
| 36 | /* ------------------------------------------------------------------------------------- */ |
| 37 | /** EVENT CSS **/ |
| 38 | /* ------------------------------------------------------------------------------------- */ |
| 39 |
| 40 | /* The main scrollbar **track** CSS class on event of "hover" and "pressed" */ |
| 41 |
| 42 | .mylistview .scroll-bar:horizontal:hover .track , |
| 43 | .mylistview .scroll-bar:horizontal:pressed .track , |
| 44 | .mylistview .scroll-bar:vertical:hover .track, |
| 45 | .mylistview .scroll-bar:vertical:pressed .track{ |
| 46 | -fx-background-color: derive(#434343,20%); |
| 47 |
| 48 | -fx-opacity: 0.2; |
| 49 | -fx-background-radius: 0em; |
| 50 |
| 51 | } |
| 52 |
| 53 | /* The main scrollbar **thumb** CSS class on event of "hover" and "pressed" */ |
| 54 | .mylistview .scroll-bar .thumb:hover, |
| 55 | .mylistview .scroll-bar .thumb:pressed{ |
| 56 | -fx-background-color: derive(black,50%); |
| 57 | } |
| 58 |
| 59 | .mylistview .increment-button:hover ,.mylistview .decrement-button:hover { |
| 60 | -fx-background-color:derive(gray,100%); |
| 61 | -fx-border-color:derive(gray,80%); |
| 62 | -fx-padding:10px; |
| 63 | } |
Here we have used following property:
-fx-padding: for giving padding space in between the class block -fx-border-color: this give the color for the border of the class -fx-background-radius: makes the background fill radius -fx-background-color: fills the background with the color like red,gree, blue etc. -fx-opacity: the opacity of the class between [0.0-1.0] -fx-background-inset: it’s the insets spaces of specific class.
Now how would you like if you want your scrollbar little bit wider and bigger than it’s default size (like of below image) . To make them wider you can just add -fx-padding property like as below CSS code.
Just override your existing CSS (style.css) codes with this few lines of codes
| 1 | /* The increment and decrement button CSS class of scrollbar */ |
| 2 | .mylistview .increment-button ,.mylistview .decrement-button { |
| 3 | -fx-background-color:transparent; |
| 4 | -fx-border-color:derive(gray,80%); |
| 5 |