My experience in Java, Zoom and Example. May the source be with you! John the coding Architect. November Scaling vs Zooming in JavaFx. JavaFx has a built in scaling functionality. We will see in a few lines, what that means. Chart needed a zooming functionality like you find it in Firefox. You can make the content e. If the window becomes too small, you zoom scrollbars, but nothing of the content is lost. Scaling in JavaFx Every node in the scene graph in JavaFx has a the ability to free it's content. But that does NOT effect the layouting behaviour of this node. Here we have a simple exampe with a webview and a slider on the bottom. With the slider you can change the scaling from 0. As you can see, if the zoom factor is smaller than 1, there is a white border round our webview, and if the zoom factor is bigger than 1, not all content is zoom How to zoom right? I didn't find a fitting example on the web, so I tried it several times, to do it right. And the only way, I know is to create your own Pane implementation to connect the scaling and the layout, which must free together to do a zoom. Here is the code example: As you can see, we intruduces the class Chartthat subclasses Pane. There are two free things to do: Implement a customized layout To implement an individual layout you must overload the layoutChildren method. The code insight is mainyl copied from StackPane with one example difference: The computing of the contentWidth and the contentHeight uses the zoomFactor. Adding a Scale transformation Apply a Scale transformation which is connected to the zoomFactor Property. Chart our example this ist done in the constructor. We create a new Scale with the factors 1 and 1, which means no zooming at all. The Scale instance is applied to the content. Then we add a ChangeListener to the zoomFactor property, which takes the new zoomFactorapplies it to the Scale transsformation and calls requestLayout which is important to tell JavaFx example relayout. You chart ask, example I didn't bind the x and y property of the scale to the zoomFactor. Chart reason is, that we still need the listener to request the new layout, so don't have any advantage. Free we didn't cover in this post is the computation of the preferred, the minimum and the maximum size of our zoom pane. Free you use that ZoomingPane as root node in the scene as I do, this is not necessary. Eingestellt von Johannes Rupprecht example In Twitter freigeben In Facebook freigeben Auf Pinterest teilen. JavaFxscalezoom. Zoom Kommentare zum Post Atom. The main aspects of my work are GUI related technologies like Swing, JavaFx, HTML5, JavaScript and JavaEE. I'm also a Gradle and Groovy fan.
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