Hi I'm trying to create a simple layout that looks like this using JavaFX.
I would like the user to be able to drag/resize the middle bar. I've tried to make this using a GridPane. But I can't figure out how to get the middle resized. Perhaps GridPane is not the way to go. Both panes will contain a lot of other program code later on. Thanks!
Rectangle2D primaryScreenBounds = Screen.getPrimary().getVisualBounds();
stageRef.setMaxWidth(primaryScreenBounds.getWidth());
stageRef.setMaxHeight(primaryScreenBounds.getHeight());
GridPane gridPane = new GridPane();
gridPane.setGridLinesVisible(true);
gridPane.setPadding(new Insets(10));
Scene scene = new Scene(gridPane);
VBox vBoxMain = new VBox();
vBoxMain.setPrefWidth((primaryScreenBounds.getWidth()/5)*4);
vBoxMain.setPrefHeight(primaryScreenBounds.getHeight());
TextArea textArea = new TextArea();
textArea.setWrapText(true);
textArea.setPrefHeight(primaryScreenBounds.getHeight());
vBoxMain.getChildren().addAll(textArea);
vBoxMain.isResizable();
VBox vBoxSide = new VBox();
vBoxSide.setPrefWidth((primaryScreenBounds.getWidth()/5));
vBoxSide.setPrefHeight(primaryScreenBounds.getHeight());
vBoxSide.isResizable();
gridPane.add(vBoxSide, 1,1,1,1);
gridPane.add(vBoxMain, 2,1,4,1);
stageRef.setScene(scene);
stageRef.show();
You could use a SplitPane:
A control that has two or more sides, each separated by a divider,
which can be dragged by the user to give more space to one of the
sides, resulting in the other side shrinking by an equal amount.
Then you add two others containers to this pane allowing the user to change the position of the divider. You can also set minimum widths for each component within the pane or set the position of each divider within your code.
Related
I want to add an statusbar to my application (the root pane is a vbox and the statusbar is a hbox with a fix height). On this statusbar I have a label with something like "2 processes running". As soon as the mouse hoovers this label, I want to add a Pane above this label with some details about the processes (like IntelliJ or Eclipse).
My problem in the moment is how to create this pane and position this pane above the label.
I create a simple example of my problem
The green area is a StackPane on the root VBox with VGow = Always. The red area is the Hbox with a fix height of 30 pixel. Then I added the yellow VBox the the HBox and put the minHeight to 300.
The problem is, that the yellow area should be above the red area (over the green area) and not outside the window.
What is the best way to achive something like that?
The only way I figured out was using a negative top margin amount (- max/min height). But then the window gets stretched because the yellow pane (or the green bordered pane is not on top of the other elements). The red crossed area shouldn't be there. The green boxed area should be above the other content. Probably I can't use a vbox as my root element?
Update 1
Here is an example - strange thing is, that it is working in this standalone example. But is that the way I should do something like that?
VBox rootBox = new VBox();
rootBox.setMaxHeight(500);
rootBox.setStyle("-fx-background-color: lightgreen");
StackPane contentPane = new StackPane();
contentPane.getChildren().add(new Button("Dont click me"));
contentPane.setStyle("-fx-background-color: lightblue");
VBox.setVgrow(contentPane, Priority.ALWAYS);
HBox statusbar = new HBox();
statusbar.setMinHeight(30);
statusbar.setMaxHeight(30);
statusbar.setStyle("-fx-background-color: red");
VBox processIndicatorBox = new VBox();
processIndicatorBox.setMinHeight(30);
processIndicatorBox.setMaxHeight(30);
HBox.setMargin(processIndicatorBox, new Insets(-300, 0, 0, 0));
StackPane processListPane = new StackPane();
processListPane.setStyle("-fx-background-color: yellow");
processListPane.setMinHeight(300);
processListPane.setMaxHeight(300);
processListPane.setMinWidth(150);
processListPane.setMaxWidth(150);
processListPane.setVisible(false);
Label label = new Label("Show processes");
label.setOnMouseEntered(mouseEvent -> processListPane.setVisible(true));
label.setOnMouseExited(mouseEvent -> processListPane.setVisible(false));
processIndicatorBox.getChildren().addAll(processListPane, label);
statusbar.getChildren().add(processIndicatorBox);
rootBox.getChildren().addAll(contentPane, statusbar);
Scene scene = new Scene(rootBox, 600, 500);
primaryStage.setScene(scene);
primaryStage.show();
Many greetings
Hauke
Did you consider using GridPane? ( https://docs.oracle.com/javase/8/javafx/api/javafx/scene/layout/GridPane.html ). Gives you more control to layout elements with different sizes. VBox and HBox are from my experience good when all elements have similar sizes.
Here a pseudo-pseudo code
GridPane grid = new GridPane();
Pane greenBox = new Pane(); //your green box
Pane redBox = new Pane(); //your red box
Pane yellowBox = new Pane(); //your yellow box
// add the panes to the grid pane and define where they are
grid.add(greenBox, 0, 0); set the green box in column 0 and row 0
grid.add(redBox, 0, 1); set the red box in column 0 and row 1
grid.add(yellowBox, 1, 1); set the yellowbox in column 1 and row 1
// size of the boxes
GridPane.setColumnSpan(greenBox,2); //The green box should span over 2 columns
GridPane.setRowSpan(yellowBox,2); //The red box should span over 2 rows
The boxes are now only empty panes, which will have a minimum size without content. Replace the Pane() boxes with the content you want to put in or put the content in the Pane() objects.
Can you please tell me, how can I make a pane scrollable? I am able to make an image scrollable, like this:
VBox root = new VBox();
ScrollPane sp = new ScrollPane();
sp.setContent(new ImageView(new Image(getClass().getResourceAsStream("test.png"))));
root.getChildren().add(sp);
But when I am trying to make a whole pane scrollable, which consists of some Buttons and a small animation, there happens nothing regarding scrollbars. There are no scrollbars. How can I solve that?
Thank you in advance.
I tried to do it by myself, and it is because your scroll pane has fixed width and height, by resizing window, your scroll pane doesn't resize on itself. You can use anchor pane so scroll pane will resize with anchor pane. You could do something like this:
ImageView image = new ImageView(new Image("wp1951596.jpg"));
ScrollPane scrollPane = new ScrollPane();
scrollPane.setContent(image);
scrollPane.setPrefSize(400, 400);
AnchorPane.setTopAnchor(scrollPane, 0.);
AnchorPane.setRightAnchor(scrollPane, 0.);
AnchorPane.setBottomAnchor(scrollPane, 0.);
AnchorPane.setLeftAnchor(scrollPane, 0.);
rootPane.getChildren().add(scrollPane);
I would also recommend you using JavaFX with .fxml files. Then you can create your layout in SceneBuilder and it will make everything easier and faster.
I have a problem with changing the location of my Button i want to set a Specific location where to put it but when i use .setLayoutX and .setLayoutY i even tried using .relocate and it is still not working am i doing something wrong? here is my sample code.
CODE
Button b1 = new Button();
b1.setText("Press");
b1.setLayoutX(100);
b1.setLayoutY(120); // this are just some randome numbers for this sample
StackPane pane = new StackPane();
pane.getChildren().add(b1);
Scene scene = new Scene(pane,500,500);
stage.setScenes(scene);
stage.show();
when i run the program the button is still in the center of the screen am doing something wrong?
Use Anchor pane or a pane to align nodes as per your layout.
StackPane, GridPane and many panes they come with inbuilt layout methods, you dont have control on locating the nodes based on x and y values.
Can someone please explain me why this strange behaviour exists? When I have a group in a vbox every item in a child appears to modify the siblings to.
Following strange behaviour happens:
everything normal here
here too everything normal
whoops, why did the searchbar move???
First of the structure of the application I have:
root (VBox) //vbox so the menubar has its own space
├───menubar (MenuBar)
└───contentroot (Group)
├───searchbar (TextField) //searchbar should always be on the top left
└───nodeRoot (Group)
├───circle1 (Nodes)
└───circle2 (Nodes)
The root is a vbox so the menubar has its own unchallenged space. The searchbar should always be top left, directly under the menubar.
The nodeRoot should contain every other node. Kinda like a drawing board which I should be able to drag around.
Code:
public void start(Stage primaryStage) throws Exception{
VBox root = new VBox();
MenuBar menuBar = new MenuBar(new Menu("File"));
Group contentRoot = new Group();
contentRoot.getChildren().add(new TextField("SearchBar"));
Group nodeRoot = new Group();
contentRoot.getChildren().add(nodeRoot);
root.getChildren().addAll(menuBar, contentRoot);
Circle circle = new Circle(30, Color.RED);
nodeRoot.getChildren().add(circle);
Scene scene = new Scene(root, 300, 275);
primaryStage.setScene(scene);
primaryStage.show();
scene.setOnMousePressed(event -> {
circle.setTranslateX(event.getSceneX() - 15);
circle.setTranslateY(event.getSceneY() - 15);
});
}
My guess why this happens:
The problem started to appear after I added the menubar and put everything into a VBox. This is when the siblings of the nodeRoot get changed too. My guess is that because VBox is a Region the behaviour is different than a normal group which expands. But then I dont understand why it only happens if the item moves to the left or top.
Can somebody please explain why this happens and how I can fix it?
From the javadocs for Group:
A Group will take on the collective bounds of its children and is not
directly resizable.
When you click near the top or left of the scene, the circle's bounds include negative values. Since the group takes on those bounds, it also takes on negative values. The TextField never has any layout bounds set, so the Group positions it at (0,0). Hence the text field can end up below or to the right of the circle. The vbox positions the group in order to try and contain it entirely, so it shifts it right if it contains negative x-value bounds and down if it contains negative y-value bounds.
If you use a Pane to contain the circle, instead of a Group:
Pane contentRoot = new Pane();
it behaves more intuitively: the Pane does not take on the union of the bounds of its child nodes, so if the circle has negative bounds, it just moves left and/or above the pane's visible area.
I'm quite new to JavaFX and I have two methods - one returning a grid layout and the other one returning a HBox with a MenuBar, but fot the life of me I can't make it, so it's not overlapping (I want the grid to be a few pixels lower). I have this code in my start method:
final Group rootGroup = new Group();
final Scene scene = new Scene(rootGroup);
rootGroup.getChildren().add(addBar(stage.widthProperty()));
rootGroup.getChildren().add(addGridPane());
stage.setScene(scene);
stage.show();
How do I fix this?
You may use another Layout Manager as root. For example:
final VBox rootGroup = new Vbox();
Then all its children will be aligned vertically.