How to align the position of a node in a pane of the grid using CSS?

Hello

I have an interface defined in FXML:

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<BorderPane xmlns:fx="http://javafx.com/fxml" >
    <center>
        <GridPane alignment="top_center" hgap="8" prefWidth="450" vgap="8" style="-fx-padding: 10;" >
            <styleClass>
                <String fx:value="form"/>
            </styleClass> 
                    
            <children>

                <Label text="From" GridPane.columnIndex="0" GridPane.rowIndex="0" />
                <TextField fx:id="from" GridPane.columnIndex="1" GridPane.rowIndex="0"/>

                <Label text="Recipient(s)" GridPane.columnIndex="0" GridPane.rowIndex="1" />
                <TextField fx:id="recipients" GridPane.columnIndex="1" GridPane.rowIndex="1"/>
                
                <Label text="Subject (defaults to title)" GridPane.columnIndex="0" GridPane.rowIndex="2" />
                <TextField fx:id="subject" GridPane.columnIndex="1" GridPane.rowIndex="2"/>                   
                
                <Label text="Send mail as ..." GridPane.columnIndex="0" GridPane.rowIndex="3" />
                <ListView fx:id="mail_format" prefHeight="100" GridPane.columnIndex="1" GridPane.rowIndex="3" />  
                
                <Label text="Plain Text Mail" GridPane.columnIndex="0" GridPane.columnSpan="2" GridPane.halignment="center" GridPane.rowIndex="4" />                  
                
                <Label text="Template" GridPane.columnIndex="0" GridPane.rowIndex="5" />
                <TextField fx:id="plain_template" GridPane.columnIndex="1" GridPane.rowIndex="5"/>                
                                  
                <Label text="Send as is (do not dump into plain text)" GridPane.columnIndex="0" GridPane.rowIndex="6" />
                <CheckBox fx:id="plain_noconvert" GridPane.columnIndex="1" GridPane.rowIndex="6"/>
                
                <Label text="HTML Mail" GridPane.columnIndex="0" GridPane.columnSpan="2" GridPane.halignment="center" GridPane.rowIndex="7" />
                                
                <Label text="Template" GridPane.columnIndex="0" GridPane.rowIndex="8" />
                <TextField fx:id="html_template" GridPane.columnIndex="1" GridPane.rowIndex="8"/>               

                <Label text="Other configuration" GridPane.columnIndex="0" GridPane.columnSpan="2" GridPane.halignment="center" GridPane.rowIndex="9" />
                
                <Label text="Reply-To" GridPane.columnIndex="0" GridPane.rowIndex="10" />
                <TextField fx:id="reply_tos" GridPane.columnIndex="1" GridPane.rowIndex="10"/>
                
                <Label text="Cc" GridPane.columnIndex="0" GridPane.rowIndex="11" />
                <TextField fx:id="ccs" GridPane.columnIndex="1" GridPane.rowIndex="11"/>
                
                <Label text="Bcc" GridPane.columnIndex="0" GridPane.rowIndex="12" />
                <TextField fx:id="bccs" GridPane.columnIndex="1" GridPane.rowIndex="12"/>
                
                <Label text="HTML base (defaults to current server)" GridPane.columnIndex="0" GridPane.rowIndex="13" />
                <TextField fx:id="html_base" GridPane.columnIndex="1" GridPane.rowIndex="13"/>
                                                                                                               
                
            </children>
        </GridPane>
    </center>
</BorderPane>

I want to align the labels to right using CSS:

.form *.label {
  -fx-alignment: right;
  -fx-font-weight: bold;
  -fx-hpos: right;
  -fx-text-alignment: right;
  -fx-text-wrap: true;
}

However I have not found any way to align the labels in the GridPane using CSS, or - fx-alignment: right, - fx-node-hpos: right. -fx-hpos: right. -fx-text-alignment: seem to work well...

The only way to make it work is to define the attribute of each label Grid.halignment:

                <Label text="HTML Mail" GridPane.columnIndex="0" GridPane.columnSpan="2" GridPane.halignment="right" GridPane.rowIndex="7" />

But what happens if I want to change that at a later stage-> I need to change this attribute for each node.

How can align the labels to right using CSS only?

Currently CSS in JFX cannot really be used for layout page (or calibration). This is one of those grey areas between what is style (which should be in the CSS) and what is layout (which should be in the FXML). I think I remember Richard mentioning once in a forum or an article that he did not want to add alignment stuff to the CSS at a certain point, but don't quote me on that. You might have a search through Kenai to see if there is a feature request for it and if not add one.

Perhaps you could it with fake labels stretch to fill the available space in the GridPane. For this, you need to disable the restriction of maximum size (setMaxWidth and setMaxHeight to Integer.MAX_VALUE) and ensure your forced GridPane are such that the label will fill the cell. Once you have a stretched label alignment will come into play as the text is aligned relative to the area of the label (as opposed to a manager that aligns the entire label compared to its parent). I think that put a border on the label when debugging to work on what's going on.

Another less confined but more flexible alternative might be to use variables in your FXML files. You can do this in a number of ways. We must create a bean that has all the variables of your on it with accessors get and then you can move it to your charger FXML namespace and then reference it by using things like ${myConstants.gridAlignment}. Another is to create static methods on a class that a node, these can then be called from the FXML using a notation similar to GridPane.alignment. This second approach only works for things where you want to work directly on the node, but for your scenario which should be ok I think. And then there is always the option to activate a script language in your FXML, allowing you to perform more nothing.

Hope that helps,
zonski

Tags: Java

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