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.
Related
I'm making a simple Java GUI app using JavaFX that has a Border Pane as the root node.
In the top section of the Border Pane, there is a Grid Pane with three columns (top Grid Pane from now on).
In the first column of the top Grid Pane, there is a Home Button, in the second column, there is an empty Region that only serves as spacer between the first and third column of the top Grid Pane, and in the third column, there is another GridPane (right Grid Pane from now on).
The right Grid Pane contains one Button (Log In Button) on start. However, when a user successfully logs into the app, two other Buttons and a Label are added to the right Grid Pane as part of the Log In Button click event.
The spacer maxWidthProperty and minWidthProperty are bound to the top Grid Pane (tgp) widthProperty and the right Grid Pane(rgp) widthProperty like this:
spacer.minWidthProperty().bind(tgp.widthProperty().subtract(80).subtract(rgp.widthProperty()).subtract(3));
spacer.maxWidthProperty().bind(tgp.widthProperty().subtract(80).subtract(rgp.widthProperty()).subtract(3));
which makes the right Grid Pane move nicely with its buttons staying on the right side of the scene when a user resizes the main stage.
However, a problem occurs when the user logs in and additional buttons are added to the right Grid Pane. The spacer somehow misses this change and its width stays the same, which makes the additional Buttons appear outside of the current stage width. The only way to refresh the spacer width is to interact with the stage somehow, by clicking minimize/maximize/restore or by clicking any button on the scene.
Is there a way to automatically refresh Region width after the nodes to which its width is bound to are modified? Or, is there a better approach to making a top Grid Pane with one button on the left and modifiable number of buttons (nodes) on the right?
Edit: Here is a demonstration of the problem with several screenshots stacked on one another:
Minimal reproducible example:
BorderPane root = new BorderPane();
GridPane tgp = new GridPane();
tgp.minWidthProperty().bind(root.widthProperty());
tgp.maxWidthProperty().bind(root.widthProperty());
tgp.setStyle("-fx-background-color: WHITE; -fx-border-color: LIGHTGREY;");
tgp.setMinHeight(37);
tgp.setMaxHeight(37);
root.setTop(tgp);
Button homeButton = new Button("Home"));
homeButton.setMinHeight(35);
homeButton.setMaxHeight(35);
homeButton.setMinWidth(80);
homeButton.setMaxWidth(80);
tgp.add(homeButton, 0, 0);
GridPane rgp = new GridPane(); // Right Grid Pane - holds User related nodes
rgp.setHgap(5);
tgp.add(rgp, 2, 0);
Label unl = new Label("My Profile");
unl.setFont(new Font("Calibri", 15));
unl.setTextFill(Color.RED);
unl.setMinWidth(Region.USE_PREF_SIZE);
Button wlButton = new Button("Watchlist");
wlButton.setMinHeight(35);
wlButton.setMaxHeight(35);
wlButton.setMinWidth(80);
wlButton.setMaxWidth(80);
Button cartButton = new Button("Cart");
cartButton.setMinHeight(35);
cartButton.setMaxHeight(35);
cartButton.setMinWidth(60);
cartButton.setMaxWidth(60);
Button logInOutButton = new Button("Log In");
logInOutButton.setMinHeight(35);
logInOutButton.setMaxHeight(35);
logInOutButton.setMinWidth(60);
logInOutButton.setMaxWidth(60);
rgp.add(logInOutButton, 3, 0);
logInOutButton.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
if (logInOutButton.getText().equals("Log In")) {
LogInStage lis = new LogInStage();
lis.initStage();
if (lis.username != null) {
logInOutButton.setText("Log Out");
rgp.add(unl, 0, 0);
rgp.add(wlButton, 1, 0);
rgp.add(cartButton, 2, 0);
}
} else if (logInOutButton.getText().equals("Log Out")) {
logInOutButton.setText("Log In");
rgp.getChildren().remove(unl);
rgp.getChildren().remove(wlButton);
rgp.getChildren().remove(cartButton);
}
}
});
Region spacer = new Region();
spacer.minWidthProperty().bind(tgp.widthProperty().subtract(80).subtract(rgp.widthProperty()).subtract(3));
spacer.maxWidthProperty().bind(tgp.widthProperty().subtract(80).subtract(rgp.widthProperty()).subtract(3));
tgp.add(spacer, 1, 0)
It's always a bad idea to use bindings, if you can avoid it. Any changes to the size constraints can lead to a new layout pass being scheduled, but during the layout pass they are assumed to be constant. If you now introduce a binding the following sequence of events could happen:
A layout pass is requested for the GridPane, setting a flag to indicate layout is required
A layout pass happens. During the layout pass the children are resized. This triggers an update of the constraints of the children with the bindings.
The flag is cleared, but the changes to the contraints already happened. The layout won't reflect this. The GridPane gets another reason to do a layout.
I don't know, how your scene is set up in detail, but I recommend using column constraints: Set the grow priorities for the outer ones to SOMETIMES and the one for the center to ALWAYS. If you require some spacing around the children, you could use GridPane.setMargin (or the padding of the GridPane itself, if you require the a distance to the edges for all children).
#Override
public void start(Stage primaryStage) {
Button[] rightContent = new Button[3];
for (int i = 0; i < rightContent.length; i++) {
Button btn = new Button(Integer.toString(i));
GridPane.setColumnIndex(btn, i);
rightContent[i] = btn;
}
Button cycle = new Button("cycle");
GridPane rgp = new GridPane(); // I would usually use a HBox here
// don't grow larger than needed
rgp.setMaxWidth(Region.USE_PREF_SIZE);
// cycle though 0 to 3 buttons on the right
cycle.setOnAction(new EventHandler<ActionEvent>() {
int nextIndex = 0;
#Override
public void handle(ActionEvent event) {
if (nextIndex >= rightContent.length) {
rgp.getChildren().clear();
nextIndex = 0;
} else {
rgp.getChildren().add(rightContent[nextIndex]);
nextIndex++;
}
}
});
ColumnConstraints sideConstraints = new ColumnConstraints();
sideConstraints.setHgrow(Priority.SOMETIMES);
ColumnConstraints centerConstraints = new ColumnConstraints();
centerConstraints.setHgrow(Priority.ALWAYS);
//prefer to grow the center part of the GridPane
GridPane root = new GridPane();
root.getColumnConstraints().addAll(sideConstraints, centerConstraints, sideConstraints);
root.add(cycle, 0, 0);
root.add(rgp, 2, 0);
// add something to visualize the center part
// you could simply leave this part out
Region center = new Region();
center.setStyle("-fx-border-radius: 10;-fx-border-width: 1;-fx-border-color:black;");
root.add(center, 1, 0);
Scene scene = new Scene(root, 400, 300);
primaryStage.setScene(scene);
primaryStage.show();
}
As mentioned in the comments, the center region is not actually needed.
I want add white border around ImageView.
One solution is to wrap the images in a Button.
And I try use StackPane:
StackPane stackPaneforImageActivity = new StackPane();
Image activityImage = new Image(file.toURI().toString());
ImageView imv = new ImageView(activityImage);
newActivityHBox.getChildren().add(stackPaneforImageActivity);
stackPaneforImageActivity.getChildren().add(imv);
stackPaneforImageActivity.setPadding(new Insets(10));
stackPaneforImageActivity.setStyle("-fx-border-color:white;-fx-background-color: black;");
imv.setFitHeight(30);
imv.setFitWidth(30);
But
Are there other solutions?
But the image is outside the StackPane. Why?
Starting point:
GridPane with 2 Columns
each Column has a Label
Like-to-have output:
space between the labels filled by dots
So far I have only come across String solutions in which the target length of the combined String is known. But this case doesn't do it for me because I need a solution which can also works when screen size changes and therefore the space between Labels do change dynamically. Could you guys please point me to the right direction?
You could put the 2 Labels in a HBox with a Region in between them, set hgrow for the labels and the Region to NEVER and ALWAYS respectively and use a linear gradient as background for the region that draws half of it's size black and the other half transparent.
Example
// 20 px wide horizontal gradient alternating between black and transparent with immediate color switch
private static final Paint FILL = new LinearGradient(
0, 0,
10, 0,
false,
CycleMethod.REPEAT,
new Stop(0, Color.BLACK),
new Stop(0.5, Color.BLACK),
new Stop(0.5, Color.TRANSPARENT)
);
// create background for regions
private static final Background BACKGROUND = new Background(new BackgroundFill(FILL, CornerRadii.EMPTY, Insets.EMPTY));
private static void addRow(Pane parent, String s1, String s2) {
// create labels
Label label1 = new Label(s2);
Label label2 = new Label('['+s2+']');
// create filler region with "stroke width" 2
Region filler = new Region();
filler.setPrefHeight(2);
filler.setBackground(BACKGROUND);
HBox hbox = new HBox(5, label1, filler, label2);
hbox.setAlignment(Pos.CENTER);
HBox.setHgrow(label1, Priority.NEVER);
HBox.setHgrow(label2, Priority.NEVER);
HBox.setHgrow(filler, Priority.ALWAYS);
hbox.setFillHeight(false);
parent.getChildren().add(hbox);
}
#Override
public void start(Stage primaryStage) {
VBox root = new VBox();
addRow(root, "JBoss", "DOWN");
addRow(root, "GlassFish", "UP");
addRow(root, "verylongprocessname", "UP");
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
You could also use a border (top only) on the Region instead of using a background and do not set prefHeight. This would allow you to actually use dots instead of strokes, but since your picture shows strokes, I posted the background approach instead...
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.
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.