Develop Reference

Free scroll pane (JavaFX)

What pane can I use to add anchorpanes(setting y and z).
Initially it is of a certain size, and if it is too many anchorpanes to show, i`d like to add a scroller with which I can scroll down the pane to see more elements.
P.S.
sry for my bad english

This Question is very simple to answer. Just use a Scroll Pane and a Element to group your Anchor-Panes, for example :
ScrollPane with VBox as Grouping
Or you can also use Frameworks for this like :
http://www.jfoenix.com/
http://fxexperience.com/controlsfx/
When I remember correctly, they designed a Pane which is automatically placing nodes like a Gallery. These nodes get moved when necessary.

javafx - Scale horizontal length according to horizontal length of scrollpane

So I have this FXML code here (generated via SceneBuilder):
http://pastebin.com/0mjBh9s7
The problem is that I want the content inside the GridPane to scale horizontally according to the horizontal size of the Scroll Pane, but the scaling does not work.
Any solution to this problem?

You do not scale anything in that fxml, nor does scaling work, since it does not influence the layoutBounds property that ScrollPane uses to determine the size of the content.
For this reason you'd need to wrap the GridPane in a Group for the ScrollPane to see the size of GridPane including scale transformations.
If you do not want to scale the content, but simply resize it to the viewport size of the ScrollPane, setting the fitToWidth property to true would be the appropriate way to handle this.

JavaFX small collapsible pane?

I want a panel around two text fields that can be collapsed, similar to a TitledPane with no text. However the TitledPane uses too much vertical space so that it saves almost no space, as it reserves the space normally used for the title. Does JavaFX offer a really space-saving panel, lets say a rectangle with a triangle for collapsing?

There is no such ui control in JavaFx apparently. You must implement your own "collapsible pane" . It is possible to use TreeView but I think it can only hold text values as child elements.

List of contacts swing

I need to implement ui for list of contacts like in skype. An contact represented by custom class(JContact) which derived from JPanel. I tried to use different layouts but not received expected result. Main frame has next structure.
JFrame -> JPanel(contactsPanel)-> JScrollPane(scrollContacts)->JPanel(contactPanel)
scrollContacts.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollContacts.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
If use FlowLayout for contactPanel (see FlowLayout in image)
Strange behavior i think, because expected what each contacts will one under one because indicate HORIZONTAL_SCROLLBAR_NEVER for scrollContacts.
If use Grid or Box layout. Layout automatically re-size my panels, it's look very ugly. see Grid&Box layouts image.
Expected result see "expected" image
----SEE IMAGE----
I'm not native speaker, so please sorry for my bad English.Thank you for attention!

Quoting the Swing tutorial:
The FlowLayout class puts components in a row, sized at their preferred size. If the horizontal space in the container is too small to put all the components in one row, the FlowLayout class uses multiple rows
So the result you get is expected.
A GridLayout object places components in a grid of cells. Each component takes all the available space within its cell, and each cell is exactly the same size. If the GridLayoutDemo window is resized, the GridLayout object changes the cell size so that the cells are as large as possible, given the space available to the container.
So the result you get is also expected.
When a BoxLayout lays out components from top to bottom, it tries to size each component at the component's preferred height. If the vertical space of the layout does not match the sum of the preferred heights, then BoxLayout tries to resize the components to fill the space.
So the result you get is also expected.
But, a box layout can contain glue components to avoid that.
I would thus use a vertical box layout, and add a vertical glue as the last component. Read the tutorial.

Java's FlowLayout does not resize correctly

I created a JFrame initialized with a BorderLayout and a JScrollPane as its CENTER element.
The scroll pane is set with VERTICAL_SCROLLBAR_ALWAYS and HORIZONTAL_SCROLLBAR_NEVER policies. The intent of my frame is to have a controlled width, while the height should grow/shrink as data is added/removed.
Inside my scroll pane, I added a simple JPanel (lets call it the content panel) which is initialized with a FlowLayout (and LEADING policy).
In order to test this, I simply populate my content panel with 20 JLabel("Item " + n) components where n is the loop counter.
I would expect to see my labels shown on a single row if the frame is large enough and the labels wrap to other lines when I shrink the width. But instead, there is only a single line displayed with no wrapping... ever.
Does anyone know why the flow layout does not wrap when a scroll pane is involved?
If I remove the scroll pane all together and put the content panel directly in the frame, the desired wrapping effect occurs, but if the frame height is shrunk smaller than the content panel height it just disappears.
The idea is that I want my labels to be wrapped when necessary but also always be visible if it means having to scroll up/down.
Any suggestions on how to fix this?
Thanks.

Wrap Layout gives an explanation and a solution.

If you work with the designer, you have to set the prefferedSize property to null (delete what is set) then set the preferred size by clicking the triple dots [...] button next to the prefferedsize property name and put your preferred value.
I encountered the same problem and it works for me.