Develop Reference

Vaadin HybridMenu shift with scrollpanel

I want to add scrollbar to my web app so I can see every components on my browser.
Red rectangle in picture below is Grid. Grid is placed inside class that extends VerticalLayout and implements View.
Green color shows my scrollbar which is added to HybridMenu instance.
HybridMenu root = HybridMenuBuilder.get()
.setContent(new VerticalLayout())
.setMenuComponent(EMenuComponents.LEFT_WITH_TOP)
.setConfig(menuConfig)
.build();
root.addStyleName("scrollpanel");
root.setSizeFull();
super.setContent(root); //class extends UI
scrollpanel definition in css:
.scrollpanel > div {
overflow: auto !important;
}
When I reduce height of browser window, menu bar is also being scrolled:
I tried to set scrollbar to VerticalLayout, but it seems like id didn't capture that grid was partly hidden. (I've setted everything in VerticalLayout to full size - How to add scrollbar to Vaadin layout)
//extends VerticalLayout implements View
private void init()
{
this.addStyleName("scrollpanel");
this.setSizeFull();
this.setMargin(false);
grid.setSizeFull();
this.addComponentsAndExpand(grid);
this.setExpandRatio(grid, 0.7f);
this.setComponentAlignment(grid, Alignment.TOP_LEFT);
}
Generally I found some not expected (at least for me) behaviour of components in VerticalLayout. They acts differently according to Layout root
(Example with VerticalLayout as root).
Questions:
How can I avoid hiding part of hybrid menu when scrolling?
Am I missing something about adding scroll panel to this VerticalLayout?
#Edit:
I found that this problem doesn't occurs if HybridMenu content is not fullSized or content is not set.
On the other hand scrollbars are not available without it.
So, creating HybridMenu the way that code below shows, solves problem with scrollpanels, but restores previous problem (layout type doesn't change anything).
AbsoluteLayout test = new AbsoluteLayout();
test.setSizeFull();
HybridMenu root = HybridMenuBuilder.get()
.setContent(test)
.setMenuComponent(EMenuComponents.LEFT_WITH_TOP)
.setConfig(menuConfig)
.build();

Vaadin: Using an image as a button

I wanted to use a image as a button. I got it working, but it is not very well made, please take a look at the screenshot. As you can see the Button itself is a lot bigger than the image, but I wanted it to be as big as the image:
The actual Button is bigger than the Image. The goal here is that there is nothing but the image to click. How can I achieve this? Here is the code ofthe button on the screenshot:
Button testButton = new Button();
String basepath = VaadinService.getCurrent().getBaseDirectory().getAbsolutePath();
testButton.setIcon(new FileResource(new File(basepath + "/VAADIN/themes/mytheme/img/Button.png")));
loginForm.addComponent(testButton);
I know that
testButton.setStyleName(BaseTheme.BUTTON_LINK)
makes the button invisible, but unfortunately that does not adjust the size of the button, just the visbility..

You can simply add a click listner to an image instead of using a button.
Image image = new Image(null, new ClassResource("/images/button-img.jpg");
image.addClickListener(e -> System.out.println("click"));
image.addStyleName("my-img-button");
And add this css, I use the #Stylesheet annotation to add in CSS.
.my-img-button {
cursor: pointer;
}

It works for me:
Button button = new Button();
button.setStyleName(ValoTheme.BUTTON_LINK);
button.setIcon(new ClassResource("/images/button-img.jpg"));
button.addClickListener(e -> System.out.println("click"));
Maybe you have additional css defined?
Maybe your button is contained in a layout with a fixed height?
Also make sure that your button has no width/height configured, so it can automatically adjust its size to that of the icon image.
The next problem you'll probably run into is the focus border:
Another approach would be to use a layout click listener, and add you own mouse-over/hover/focus styling via CSS.
VerticalLayout layout = new VerticalLayout(new Image(null, new ClassResource("/images/test.png")));
layout.addLayoutClickListener(e -> System.out.println("click"));

With Vaadin 14:
Image img = new Image("src");
Button testButton = new Button(img);
Quite straightforward.

How to put two components at the same place

I am currently building a game and I don't know how to make a main menu. I don't know how to put the text on the GIF background. Now the thing is when I try to put them on I try this code:
private void initializeDisplay() {
playBtn.setBorderPainted(false);
playBtn.setFocusPainted(false);
playBtn.setContentAreaFilled(false);
playBtn.setText("PLAY");
playBtn.setFont(new Font("Poiret One", Font.TRUETYPE_FONT, 27));
playBtn.setForeground(Color.WHITE);
mainPanel.add(playBtn);
mainPanel.add(bgImg);
mainPanel.setLayout(new GridBagLayout());
bgImg.setLocation(new Point(200, 200));
mainPanel.setOpaque(true);
mainPanel.addKeyListener(new Keyboard());
mainPanel.addMouseListener(new Mouse());
mainPanel.setFocusable(true);
}
Also when I do that I use a GridBagLayout for the layout type but it seems that I'm not get the result I want, the problem is the button not the image in the background because that's appearing but the button isn't appearing.

You could also add an image to a jlabel's icon field, and then add the label to your panel's content pane.
This post explains it more:
How to set a background picture in JPanel

JavaFx Button adds ellipsis when rendered on a E4 ToolControl

I've an E4 application which has a ToolControl, the class that handles the tool control creates a JavaFX button, for some reason the button adds ellipsis and I've no clue why.
Here is the link to the sample application
https://github.com/SDSethia/ColoredButton.git

JavaFX shortens the label automatically, when the size of the control (a button in your case) is too small for the text. This is independent of E4. So if you increase the size of the button, the complete text will show.
I looked at your project and I am wondering why you are using the SWT renderers, although you want to use JavaFX!
If you want to use E4 + JavaFX I recommend to use the e(fx)clipse renderers. This tutorial should get you started: https://wiki.eclipse.org/Efxclipse/Tutorials/Tutorial4

The button needs a layout (I wrapped mine in an HBox) for it to render correctly. Here is the modified code
final FXCanvas canvas = new FXCanvas(parent, SWT.NONE);
button = new Button();
button.setText("FxButton (1)");
button.setStyle("-fx-background-color: #186dee; -fx-text-fill: white;");
final HBox box = new HBox();
box.getChildren().add(button);
final Scene scene = new Scene(box);
canvas.setScene(scene);
This solved the issue.

Using a JScrollPane in a JEditorPane

Hi so I'm struggling to apply a JScrollPanel within a JEditorPane.
I have a main content window (which has a scroll bar) and within that a JEditorPane that I would like to scroll slide horizontal and vertical. So far I have
JEditorPane monApp = new JEditorPane();
and have tried
ScrollablePanel panel = new ScrollablePanel();
panel.setScrollableWidth( ScrollablePanel.ScrollableSizeHint.FIT );
along with a few other things but couldn't seem to get any of them working.