Updated: question is incorrect because of low knowledge of the subject. Sorry.
I'm trying to create a small application that shows a graph that contains nodes and connections between them. Both nodes and connections are complex, I mean they can have another components in it, like labels.
I have a big Pane which plays a canvas role. I'm going to add and remove elements from it. The problem is that I want to add or remove graph elements dynamically, using buttons or context menu. Sort of Paint for Graphs :) And I have no idea how to implement it.
Especially I desperately need help in dynamical adding/removing mechanism. I would be very grateful for your help!
Just get the child list of the pane you want to add stuff to, and add the stuff when the appropriate action occurs.
FlowPane pane = new FlowPane();
Button addNode = new Button("Add");
addNode.setOnAction(e -> pane.getChildren().add(new Circle(10));
Notes:
If you want to use a Pane rather than a FlowPane, then Pane has no internal layout, so you need to also set the layoutX and layoutY properties appropriately when you add to the Pane.
If you want to change the rendering order of nodes in the Pane (e.g. which nodes are rendered on the bottom and which on top), then you do that by adding new nodes at an appropriate position in the child list; for example, pane.getChildren().add(0, new Circle(10)), will add a circle that is rendered underneath all other children of the pane rather than on top.
Related
for my school project I am trying to make Classdiagrams graphical editor in JavaFX.
I have one rootpane (Pane) and by iterating through input parser I print graphical objects.
Every graphical object is child of Pane which holds elements (rect,text,line...) and that Pane with elements is child node of Rootpane (Pane). So Rootpane (Pane) has few childs of Pane.
Problem is, that after creating the Panes with graphical elements they do make some overlay around every Pane and I cannot drag other Panes.
I need to explicitly set Pane dimensions for example to be clipped by main Rectangle.
But this is not possible. Only way to do is make child nodes StackPane instead of Pane but my whole implementation now stands on absoulete positioning so It would be to rework whole project.
Does anyone know, by which command Can I set bounds to every Pane node not to overlay other nodes.
I would not make the elements a Pane. Instead I would use a Group node. And you can set a clipping path for every node (the group in your case), so I do not quite understand what your problem is.
I'm a bit new to Javafx and have only ever done simple projects with it. I'm currently working on a more complex project and I'm stumbled into an issue with ScrollPanes. I'm struggling to find out how to make the ScrollPane resize in height whenever I resize the application. Here is my structure:
The Pane indicated by the orange arrow works fine, I can add constraints as shown here:
However I do not have the constraint options on the ScrollPane or the AnchorPane inside of the ScrollPane, which results in this upon resizing of the application:
If I remove the parent Pane and just put the ScrollPane in it's place, I can add the constraints, however if I did that I would not be able to properly design the application as I have it now. In short, I'm just curious if there's an alternate method I can use or if I'm just using bad practice, in which case any advice is appreciated.
Pane simply resizes the children to the preferred size and keeps the position. This means no resizing is applied. Also it does not offer any further layout constraints.
You could simply replace the parent pane with a AnchorPane and the anchors become available again.
However a AnchorPane(base) containing that many Panes, probably all with different AnchorPane constraints, indicates that the scene should probably be restructured a bit. E.g. a GridPane, VBox, HBox or a combination of those could help you achieve the desired result in a simpler way.
See Using Built-in Layout Panes for a description of the available layouts and example uses.
The end goal is to reproduce this image as well as possible. I am trying to start from a bottom up approach as I have many questions.
My first question is how can I get labels alongside the textboxes (it has been suggested to use VBoxes on an hbox to organize everything, but then the textbox automatically goes below the label)
My second question is, as you can see there are borders around the four related boxes to separate the information. I am uncertain how this is done.
Finally what is the configuration of Panes that I should put these four groups on. As I mentioned below someone suggested VBoxes placed on a HBox but I can't get the text to be at the right spot with this approach.
One last thing... I was trying to use ComboBoxes but I can only make one selection, unlike in the image showing the appetizers and main courses selected.
I looked at ListView but its not a drop down box and I read in the API that this in general is not supported since they thought having multiple selections was not necessary. So how might one approach this?
Thanks so much
I'de recommaned an HBox as the primary container, and a VBox on the left side containing the three panes.
In case the window is resizable, and you want to keep either of the panes flushed to the side, try AnchorPane, instead of the HBox.
this required nested panes. for those with similar assignments, creating grid boxes and placing them inside titled boxes allows for the "group box" effect shown above that was a part of swing. An additional HBox was added where the image and title were, making three parts: the top HBox, the right title box, and the left VBox.the left VBox and the top HBox were added into a VBox (or grid), linking the entire left side, which was then placed in an hbox along with the right side title pane.
I want to create a scrollable timeline controller with circles connected to a baseline filled with a number ( size of circle corresponding to containing number) and a trailing icon.
Since I am new to JavaFX i have no idea how to start. In Swing i would e.g. use JPanel and ovverride its onPaint() method to draw the circles, lines and icons...
In JavaFX I thought about using a horizontal ListView with custom ListCell, but i am not sure if the baseline is possible with it. So i am looking for ideas how to implementiert such a controll...
Try using a HBox wrapped inside a ScrollPane.
You can add elements to HBox using getChildren.add(node). The elements will be automatically shown on the scene and the ScrollPane will adjust the ScrollBar for you.
In JavaFX, if I have a scene with 2 VBox elements and each VBox has multiple Label in it.
If I set the top VBox to invisible, why does the bottom VBox not move up the scene where the top VBox was ?
The VBox is invisible but I would expect the other objects to move into its place.
I am using FXML to load my controls.
Node.setVisible(boolean) just toggles the visibility state of a Node.
To exclude a Node from its parents layout calculations you additionally have to set its managed state, by calling Node.setManaged(false).
If you want the managed state to be updated automatically alongside the visibility, you can use a binding as #jewelsea pointed out: node.managedProperty().bind(node.visibleProperty());
Since it's invisible, it wont move to the top. You have to remove it with something like:
// remove
vbox.getChildren().remove(...)
Once you've removed the element you want invisible then, the other element should move to the top.
Try to use setVisible and managedProperty together. Here is an example:
myHBox.setVisible(false);
myHBox.managedProperty().bind(myHBox.visibleProperty());
Instead of hiding the vbox you should remove it from the Children and if you want to show it again add the vbox again.
If l want to hide and unhide a node,
I resize the node to 0 if l want to hide it. That way, the node will not occupy space since is not visible to the user, so when l want it to be visible, l adjust the size again for it to be visible.