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.
Related
Before I start, I'm aware that its a bad idea to not use a Layout Manager and usually I do use one, however, I also have all my components automatically re-size and relocate based on the size of the window. In addition the program I'm working on is only intended to run on 1 machine throughout its entire lifetime. Please don't downvote me just because of lack of layout manager, I found it to be what I need for this particular program.
To my issue, I found a similar post on stackoverflow but a solution was never achieved.
I'm adding a dynamic amount of JLabels to my JPanel, I've noticed that when not using a layout manager, the scroller doesn't work.
This is a simplified version of my initialization code.
JPanel mypanel = new JPanel();
mypanel.setLayout(null);
mypanel.setSize(800,450);
mypanel.setForeground(Color.WHITE);
mypanel.setBackground(Color.BLACK);
scrollablePanel = new JScrollPane(mypanel);
scrollablePanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollablePanel.setPreferredSize(new Dimension(800,300));
scrollablePanel.setSize(800,300);
scrollablePanel.setLocation(250,156);
myContainer.add(scrollablePanel);
where myContainer would be the container (also without a layout manager). The JLabels are added later on to the JPanel with:
enter code heremypanel.add(label1);
after some basic settings are set for the labels such as setForeground and setBackground.
Unfortunately when run, the scrollbar appears as if its not required (see image)
http://i.imgur.com/zp0QKGG.png
The table text seen in the image is made up of multiple JLabels.
If it's not possible to resolve the issue without using a Layout Manager I will switch to BoxLayout, I was just hoping there would be a solution.
The problem is JScrollPanel needs the preferred size of the view component to determine when the view exceeds the scroll pane's viewable area.
The preferred size of a component is normally determined via the layout manager. While you can use setPreferredSize, it is typically discouraged and you will simply run into the same problem as the content exceeds what ever value you decide to set.
A better solution would be to use a LayoutManager or compound layout (using multiple layout managers over multiple containers) to achieve the result you desired...or write your own...
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.
Very strange occurrence, am in need of a quick way to make my panel components (labels and textboxes) visible again on the form in NetBeans. As soon as I added the Table to the right of the panel, the panel seems to have disappeared. Strangely enough, the components continue to be available in the left side, in the Navigator box, so they are not completely gone, just seem to be hidden. I was unable to find any Visible property, that I could to set to true. Any help is much appreciated. Also, what exactly triggered this behaviour, is this a bug? Many thanks in advance.
Its a focus issue, it makes things easier when you have lots of components.
At the moment you have the scrollPane selected/focused, so you will only be able to see that and any child components.
If you want to see sister or parent components you need to set your focus to your jFrame (or whatever component you want to see).
You can do this from the box on the bottom left, just double click on jFrame, its the top item and also parent to both the scrollPane you have selected now and also parent of your jPanel that contains all the other buttons and labels.
This will have been caused when you double clicked the scrollPane.
I am trying to develop an app using JavaFX 8 and I'm stuck with a resizing problem. The Selected File and Password fields in the below figure doesn't realign as I wish it to be in the AnchorPane..i.e. to be in the center with exact distances from the top navigation bar and the footer. I have tried AnchorPane Constraints in Scene Builder. I was unable to get a perfect match.
Hoping to get an alternate approach or a small overview of AnchorPane constraints.
Note: I'm new to JavaFX graphics library.
Below enclosed are the images and the FXML file that I'm working on.
What I want is this kind of alignment in full screen mode too.
This is the actuality when I switch to full screen.
For a quick fix, try wrapping your AnchorPane in a simple layout, such as an HBox, and set the alignment of the HBox to Pos.CENTER.
However, AnchorPane is probably not the best layout pane to use here. You should read through the layout tutorial and figure out a different strategy: probably you want a BorderPane as the overall structure with HBoxs and/or GridPanes inside.
Before I start, I'm aware that its a bad idea to not use a Layout Manager and usually I do use one, however, I also have all my components automatically re-size and relocate based on the size of the window. In addition the program I'm working on is only intended to run on 1 machine throughout its entire lifetime. Please don't downvote me just because of lack of layout manager, I found it to be what I need for this particular program.
To my issue, I found a similar post on stackoverflow but a solution was never achieved.
I'm adding a dynamic amount of JLabels to my JPanel, I've noticed that when not using a layout manager, the scroller doesn't work.
This is a simplified version of my initialization code.
JPanel mypanel = new JPanel();
mypanel.setLayout(null);
mypanel.setSize(800,450);
mypanel.setForeground(Color.WHITE);
mypanel.setBackground(Color.BLACK);
scrollablePanel = new JScrollPane(mypanel);
scrollablePanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollablePanel.setPreferredSize(new Dimension(800,300));
scrollablePanel.setSize(800,300);
scrollablePanel.setLocation(250,156);
myContainer.add(scrollablePanel);
where myContainer would be the container (also without a layout manager). The JLabels are added later on to the JPanel with:
enter code heremypanel.add(label1);
after some basic settings are set for the labels such as setForeground and setBackground.
Unfortunately when run, the scrollbar appears as if its not required (see image)
http://i.imgur.com/zp0QKGG.png
The table text seen in the image is made up of multiple JLabels.
If it's not possible to resolve the issue without using a Layout Manager I will switch to BoxLayout, I was just hoping there would be a solution.
The problem is JScrollPanel needs the preferred size of the view component to determine when the view exceeds the scroll pane's viewable area.
The preferred size of a component is normally determined via the layout manager. While you can use setPreferredSize, it is typically discouraged and you will simply run into the same problem as the content exceeds what ever value you decide to set.
A better solution would be to use a LayoutManager or compound layout (using multiple layout managers over multiple containers) to achieve the result you desired...or write your own...