I design a custom component (mainly override paintComponent for desiring appearance) and compile it then drag it to a JPanel in the Netbeans design mode.
It works correctly and the Netbeans designer renders it in time and correctly when changing the property of the component. But when I modify the custom component source code and recompile it, the Netbeans UI designer doesn't update the appearance of the component unless deleting it then dragging the recompiled component to the panel.
Is there a way to update the modified and recompiled components in Netbeans UI designer without deleting them?
Related
If I wanted to scroll to a newly generated component after some work is done/outputted, how would I do that via Java? Or would I need to introduce additional functions with JS/CSS files into the build?
This should work:
UI.getCurrent().getPage().executeJs("arguments[0].scrollIntoView({behavior:'smooth'});", component));
Here component would just be the name of the target component, and the behavior of the scrolling would be smooth. There is also "auto" for the behavior but I prefer the former.
I am currently completely stuck with the following problem: I want an GUI with a cotrol panel at the right to type in some program parameters that should be used to draw multiple lines onto a graphic panel at the left side of my GUI. My approach was to use the Form Designer to arrange the Layout with all the Buttons, Lables and TextFields. Than I created a Class "GraphicPanel" that extends JPanel and I overrided the PaintComponent method of this class in order to draw the lines.
Now I want to add this custom created component via the form Designer to my UI. But when I try this via the Non-Palette-Component option: nothing happens and the component is not even shown in the hierarchy-tree. I have already serached the web for solutions and found that my class needs to be compiled and the ReloadCustomComponents-Button must be clicked after inserting custom stuff. My class is compiled but the ReloadCustomComponents-Button is not shown up in the UI-Designer Toolbar. I tried to configure the toolbar manually - and in the configuration setup Intellij is also listing the Button as a displayed icon - but it is not there when I apply the configuration. Did anyone had the same problem or does anyone have any suggestions what I can try or what else I can check out? I am actually wondering if this is a software bug or whether I missed something different. I am quite a beginner and especially working with UI's and Swing is new for me so I have no real idea how to go on with this. Thanks for any help!
(I am using Intellij Idea 2020.3.1 on Windows and JDK 15.0.1 and my output format for the UI-form code is set to binary class files)
UI component classes used in the UI Designer palette must be compiled for the same or lower Java target version as is used to run IntelliJ IDEA. IDE JDK version is available in Help | About dialog and is 11 for 2020.x IDE versions.
Change the target JDK version to 11 so that IDE can load the component classes. See this answer for the relevant places where JDK language levels are configured.
So I made a JPanel and a JFrame using the Design functions in NetBeans and when I try to drag the panel onto the JFrame, I get the error "The component cannot be instantiated. Please make sure it is a JavaBeans component."
What I did was create an empty Frame and then create the Panel and put it all together using the panels, buttons, and text fields. I didn't modify the source code or anything. Is there some kind of code I need to add into the panel to make it work with the JFrame? Or perhaps I missed a step in the design tab? I've included a picture that shows exactly what it is I made.
jpanel
Clean and build the project (and sub projects as required).
If you're using Netbeans 7+, you can check the messages.log found in C:/Users/{username}/AppData/Roaming/NetBeans/{Netbeans version}/var/log and check for the exception that caused the problem.
I think the new 7.2 beta reports the problems to the user now (thankfully).
Scenario : In NetBeans, you create Swing components via drag & drop and customize some properties via the given GUI.
Question : Later on, If you see the generated code of these components, either in source or by by right-clicking the component and selecting customize code, we can see that the property changes are implemented via AWT. Why is this so?
As mentioned in Using Top-Level Containers,
Each program that uses Swing components has at least one top-level
container. This top-level container is the root of a containment
hierarchy — the hierarchy that contains all of the Swing components
that appear inside the top-level container.
java.awt.Container, an AWT Componenet, is that container.
Addendum: This overview suggests how pervasively the interface java.beans.PropertyChangeListener is used throughout AWT and Swing.
I am currently building a small visual designer using the Netbeans Platform. All my components that can be placed on the JPanel show correctly in the Palette Window.
What I am struggling to do at the moment, is to let the property window show the properties of the component that was either just dragged and dropped or showing the currently selected component in the JPanel in the Properties window.
Any help would be greatly appreciated.
You need to associate the object you want displayed in the Lookup of the palette. Presumably you have a Node associated with that Lookup object. Within that Node you need to override the createSheet method