I have a problem in JavaFX with FXML , i created an ImageView in FXML and gave it an id . how can i simply use the ImageView that i have created in FXML in the java class code ?
When defining the ImageView in your controller, you need to add the #FXML annotation before it.
An example in Java would be like so:
#FXML
private Canvas canvas;
And in the FXML file:
<center>
<Canvas fx:id="canvas" height="600" width="600" />
</center>
Just keep in mind that the name in Java must be the same as the id in the FXML file
Related
how can I add the scroll abiltiy with VirtualizedScrollPane (explained in GenericStyledArea-#Adding Scrollbars to the Area) for InlineCssTextArea in JavaFx Scene Builder? Any suggestions?
I found a workaround.Editing the FXML-file by hand.
Like the RichtTextFX-Issue descriped:
<VirtualizedScrollPane
fx:id="sourceContainerTextScreenVirtualizedScrollPane"
layoutX="265.0"
layoutY="98.0">
<content>
<InlineCssTextArea
fx:id="theICA"
layoutX="0.0"
layoutY="0.0"
onKeyReleased="#handler"
onMouseReleased="handelrer2"
prefHeight="277.0"
prefWidth="674.0"
wrapText="true"/>
</content>
</VirtualizedScrollPane>
but add also a
#FXML private VirtualizedScrollPane<InlineCssTextArea> sourceContainerTextScreenVirtualizedScrollPane;
to your controller, if you want to controll it. Otherwise in my code it also works without controller declaration.
I hope this will help you till it is included into the Scene Builder.
I can't work out how to set the value of a Label defined in FXML from the controller initializer.
In my FXML I have (in a HBox):
<Label text="Label: " />
<Label fx:id="myLabel" />
And in the controller I have:
#FXML
private Label myLabel;
#FXML
private void initialize() {
myLabel.setText("Hello!");
}
The label stays blank when I run the program. What am I doing wrong? (I suspect initialize() is not running - the Eclipse debugger doesn't stop in it when I set a breakpoint - but I'm not sure and I can't get JavaFX to respect console printf statements for me to do debug print statements.)
In my program i have a tabPane with each tab having in own FXML file and controller .I have loaded the FXML file for tab 2 (Schedular).I`m trying to call a function in my child controller (Scheduler) from my parent controller(FXML Document) . When i load the controller using FXML Loader it returns a null. How can i solve this .
Here is my main code:
Main FXMLDocument :
<AnchorPane xmlns:fx="http://javafx.com/fxml/1" fx:id="AnchorPane" prefHeight="600" prefWidth="800" xmlns="http://javafx.com/javafx/8.0.65" fx:controller="showprojavafxml.FXMLDocumentController">
<children>
The FXMLLoader only instantiates the controller when it loads the fxml file (this has to be the case, since the controller class is specified in the fxml file...). Since you never call load() on the loader, the controller is never created.
It looks like you are referencing the FXML file twice through two different mechanisms: once in FXMLDocumentController.initialize(), where you create a FXMLLoader whose location is set to the fxml file, and once in the main FXML document itself, via a <fx:include>. The <fx:include> is causing the UI defined in Scheduler.fxml to be displayed; the FXMLLoader you create in the initialize() method is not (because you never call load() and display the result).
To reference a controller for an included fxml, use the "Nested controller" technique.
First, add an fx:id to your fx:include:
<Tab fx:id="tab2" text="Scheduler" >
<fx:include fx:id="scheduler" source="Scheduler.fxml" />
</Tab>
Now you can inject the controller into a field whose name is the fx:id with the text "Controller" appended:
public class FXMLDocumentController {
#FXML
private SchedulerController schedulerController ;
#Override
public void initialize(URL url, ResourceBundle rb) {
schedulerController.refreshList();
}
}
(DUPLICATE & SOLVED - see answer below)
I'm doing my first steps in JavaFX and it seems quite hard to use the "SceneBuilder". I'm used to Android and the QtCreator. It looks to me that there is accessing the UI components much easier.
Something like findViewById(R.id.btnPushMe); <- Android Code
Actually I got an solution but it is quite uncomfortable to use. This looks as this:
FXMLLoader loader = new FXMLLoader(MainApp.class.getResource("../fmxl/main.fxml"));
AnchorPane pane = loader.load();
System.out.println("panechilds:" + pane.getChildren().size());
BorderPane border = (BorderPane) pane.getChildren().get(0);
System.out.println("borderchilds:" + border.getChildren().size());
the xml..
<AnchorPane fx:id="mAnchor" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="800.0"
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="app.progui.MainController">
<children>
<BorderPane layoutX="-1.0" prefHeight="600.0" prefWidth="800.0">
<top>
...
Thanks in advance
Martin
Edit:
This is a duplicate question (but I will not delete it, because I took some time to find the answer - maybe because JavaFX wasn't asked as much as Android questions were..)
AnchorPane anchor = (AnchorPane) scene.lookup("#mAnchor");
found here: How to find an element with an ID in JavaFX?
You should use a controller class and access the UI elements there.
Basically you do:
<AnchorPane fx:id="mAnchor" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="600.0" prefWidth="800.0"
xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="app.progui.MainController">
<children>
<BorderPane fx:id="border" layoutX="-1.0" prefHeight="600.0" prefWidth="800.0">
<top>
...
And then you can access the fx:id-attributed elements in the controller with
package app.progui ;
// ...
public class MainController {
#FXML
private BorderPane border ;
public void initialize() {
border.setStyle("-fx-background-color: antiquewhite;");
// ...
}
// ...
}
The field names in the controller class must match the fx:id values in the FXML file.
It is possible to access the fx:id-attributed elements in the class that invoked the FXMLLoader, but if you need to do this it is usually a sign that your overall design is wrong. You can do:
FXMLLoader loader = new FXMLLoader(MainApp.class.getResource("../fmxl/main.fxml"));
AnchorPane pane = loader.load();
Map<String, Object> fxmlNamespace = loader.getNamespace();
BorderPane border = (BorderPane) fxmlNamespace.get("border");
assuming the fx:id defined in the FXML snipped above.
When you design for FXML, you typically design three things: the application logic, the GUI controller logic, and the FXML.
References to the UI controls you wish to access are injected by the FXML loader into your controller class during its loading and initialization so that you do not need to use a FindById() method.
A controller class looks similar to this:
class DCServRecEditor extends DialogController {
#FXML // ResourceBundle that was given to the FXMLLoader
private ResourceBundle resources;
#FXML // URL location of the FXML file that was given to the FXMLLoader
private URL location;
#FXML // fx:id="ancMatchSelector"
private AnchorPane ancMatchSelector; // Value injected by FXMLLoader
#FXML // fx:id="ancServEditor"
private AnchorPane ancServEditor; // Value injected by FXMLLoader
#FXML // fx:id="ancServRecEditor"
private AnchorPane ancServRecEditor; // Value injected by FXMLLoader
:
:
The FXML loading facility automatically injects references into instance fields that are annotated with the #FXML tag. To manipulate a UI control, just access its methods using the appropriate reference.
Separating the UI control logic from your application logic is highly desirable, and effects a "separation of concerns". When you get used to designing FXML UI's this way, you'll enjoy it.
<AnchorPane>
<TreeView fx:id="locationTreeView" focusTraversable="true" prefHeight="449.0" prefWidth="725.0" style="#tree
{
-fx-border-style:solid;
-fx-border-width:1px;
-fx-border-color:#ffffff;
}"/>
In the above fxml code I want to add one more <TreeView> but through the controller. How can I do this?
You will have to:
Give a fx:id to the AnchorPane:
<AnchorPane fx:id="theAnchorPane">
Add the corresponding field in the controller:
#FXML private AnchorPane theAnchorPane;
From the code that performs the addition you have to:
Create the new TreeView however you like:
TreeView newTreeView = ...;
Add it to the childen of the AnchorPane, possibly with some constraints:
theAnchorPane.getChildren().add(newTreeView);
AnchorPane.setTopAnchor(newTreeView, ...); // etc