I want to display Shape on Pane in JavaFx. I am using oracle JGeometry object selected from spatial database, it has a method createShape() but it returns java.awt.Shape.
Is it possible to create JavaFx object also so easily? Maybe I am just blind but I haven't found anything and don't want to program too much stuff on top. Thank you
Java only supports a handful of shapes, so it is not very difficult to write a little converter but if all you want to do is to draw the AWT shapes on a JavaFX canvas, then maybe this library can be helpful: http://www.jfree.org/fxgraphics2d/
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I need to create a chart like this picture bellow in Android.
and I am already aware of MPAndroidChart and AndroidHelloCharts libraries. but none of them are capable of drawing such thing.
do you know any way to create a chart like this?
please explain and at least suggest me some tutorials or articles that are related to what I am about to do.
thank you
Its actually pretty simple to create your own bar chart.
First you need to use drawRect to draw a rectangle.
And then drawText to draw text below the rectangle.
You may have noticed that both methods take a paint object as the parameter , you can think of the paint object like a brush. So you set the color to the brush and draw different elements.
I have written about it
here
This is not a typical "what library do i use?" or "is there an API for that". Using lines of code I create not implementing them through a library of sorts. Is there any documentation on how to actually create a window, and within that window draw a line from pixels?
I just want to understand how its done, and not learn through a library which does it for me.
Previously tried:
JavaFx
Swing
If you want to draw a line in a window, you'll ultimately have to create a BufferedImage, set pixels in that BufferedImage according to some drawing algorithm (like Bresenham's), then put the BufferedImage in the window.
Hi I am trying to create simple 2d graphic editor. I need some library which will create shape from given points(draw lines between these points) and then user can move this shape with mouse or scale this shape with mouse. I need points, because I have Oracle Jgeometry shape saved in database and I need to visualize it. Could you please help me?
I found jGraph but I don't know, how to create shape from points, or get these points from shape
Instead of reinventing the wheel I would suggest using svg. There is a pretty nice implementation from Apache: https://xmlgraphics.apache.org/batik/
You could generate svg from your data (which is pretty easy) and pass it on to batik to show in a component or you can use their bindings to Java2D to draw.
As a bonus you can use existing tools like Inkscape to edit you drawings further.
There are existing projects which use this to do simmilar things like you want: https://xmlgraphics.apache.org/batik/uses.html
I am a C/C++ programmer trying my hand at Java for the first time. I'm currently working on a program that reads in a bunch of data and builds a map. I want to give the user the option to toggle various features of the map using check boxes.
In the Win32 API, I was able to accomplish this by pre-building the features on transparent bitmaps and then BitBlt()ing them over top one another. Does Java Swing support something similar? I imagine I'm not the only person who has ever wanted to do this. Building the features is relatively slow, so I only want to generate the layers once and then block copy them to the JPanel I'm using as a display.
Thanks in advance!
You could dynamically create BufferedImage objects, with alpha channels, then only paint this on a frame if the checkbox is checked.
You can store images in Swing using the BufferedImage class, and then use that to later draw the final image.
http://docs.oracle.com/javase/6/docs/api/java/awt/image/BufferedImage.html
The final image can later be painted on to the JPanel (probably by overriding the JPanel's paintComponent method) by using the alpha values of the images.
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how to drag object
I need to draw some UML components (classes, packages etc) using Java 2D and then be able to drag them around. Is there a way to do this? I mean, to make a shape "draggable"?
JHotDraw was designed as "a Java GUI framework for technical and structured Graphics." The linked JHotDraw Pattern Language: JHotDraw Domain Overview illustrates how to customize drawing editors. The sample org.jhotdraw.samples.draw.Main is a reasonable starting point, and JModeller is a simple UML editor built using the framework.
Are you forced to swing?
If not you might have look at draw2d which is a java library that works on a SWT canvas. You can find some examples of draw2d here.
You can only add MouseListener to a (J)Component. All Java2D stuff is painted on the component. If you manage all shapes in a List you can search for the correct shape under the mouse courser, move it and repaint the component.