Instantly share code, notes, and snippets.
Last activeAugust 28, 2018 08:25
Save dlemmermann/f9bcf4f2a883fff5d0d64faff1b31b87 to your computer and use it in GitHub Desktop.
This code shows how you can use clipping in JavaFX in combination with the alpha channel to implement fade in / out effects (not animations).
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| importjavafx.beans.property.DoubleProperty; | |
| importjavafx.beans.property.SimpleDoubleProperty; | |
| importjavafx.beans.property.SimpleObjectProperty; | |
| importjavafx.scene.Node; | |
| importjavafx.scene.control.Control; | |
| importjavafx.scene.control.Skin; | |
| publicclassMaskedViewextendsControl { | |
| publicMaskedView(Nodecontent) { | |
| setContent(content); | |
| } | |
| @Override | |
| protectedSkin<?>createDefaultSkin() { | |
| returnnewMaskedViewSkin(this); | |
| } | |
| privatefinalSimpleObjectProperty<Node>content =newSimpleObjectProperty<>(this,"content"); | |
| publicfinalNodegetContent() { | |
| returncontent.get(); | |
| } | |
| publicfinalSimpleObjectProperty<Node>contentProperty() { | |
| returncontent; | |
| } | |
| publicfinalvoidsetContent(Nodecontent) { | |
| this.content.set(content); | |
| } | |
| privatefinalDoublePropertyfadingSize =newSimpleDoubleProperty(this,"fadingSize",120); | |
| publicfinaldoublegetFadingSize() { | |
| returnfadingSize.get(); | |
| } | |
| publicfinalDoublePropertyfadingSizeProperty() { | |
| returnfadingSize; | |
| } | |
| publicfinalvoidsetFadingSize(doublefadingSize) { | |
| this.fadingSize.set(fadingSize); | |
| } | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| importjavafx.beans.InvalidationListener; | |
| importjavafx.beans.WeakInvalidationListener; | |
| importjavafx.scene.Group; | |
| importjavafx.scene.Node; | |
| importjavafx.scene.control.SkinBase; | |
| importjavafx.scene.layout.StackPane; | |
| importjavafx.scene.paint.Color; | |
| importjavafx.scene.paint.CycleMethod; | |
| importjavafx.scene.paint.LinearGradient; | |
| importjavafx.scene.paint.Stop; | |
| importjavafx.scene.shape.Rectangle; | |
| publicclassMaskedViewSkinextendsSkinBase<MaskedView> { | |
| privatefinalRectangleleftClip; | |
| privatefinalRectanglerightClip; | |
| privatefinalRectanglecenterClip; | |
| privatefinalGroupgroup; | |
| privatefinalStackPanestackPane; | |
| publicMaskedViewSkin(MaskedViewview) { | |
| super(view); | |
| leftClip =newRectangle(); | |
| rightClip =newRectangle(); | |
| centerClip =newRectangle(); | |
| centerClip.setFill(Color.BLACK); | |
| leftClip.setManaged(false); | |
| centerClip.setManaged(false); | |
| rightClip.setManaged(false); | |
| group =newGroup(leftClip,centerClip,rightClip); | |
| stackPane =newStackPane(); | |
| stackPane.setManaged(false); | |
| stackPane.setClip(group); | |
| getChildren().add(stackPane); | |
| view.contentProperty().addListener((observable,oldContent,newContent) ->buildView(oldContent,newContent)); | |
| buildView(null,view.getContent()); | |
| view.widthProperty().addListener(it ->updateClip()); | |
| view.fadingSizeProperty().addListener(it ->updateClip()); | |
| } | |
| privatefinalInvalidationListenertranslateXListener =it ->updateClip(); | |
| privatefinalWeakInvalidationListenerweakTranslateXListener =newWeakInvalidationListener(translateXListener); | |
| privatevoidbuildView(NodeoldContent,NodenewContent) { | |
| if (oldContent !=null) { | |
| stackPane.getChildren().clear(); | |
| oldContent.translateXProperty().removeListener(weakTranslateXListener); | |
| } | |
| if (newContent !=null) { | |
| stackPane.getChildren().setAll(newContent); | |
| newContent.translateXProperty().addListener(weakTranslateXListener); | |
| } | |
| updateClip(); | |
| } | |
| privatevoidupdateClip() { | |
| finalMaskedViewview =getSkinnable(); | |
| Nodecontent =view.getContent(); | |
| if (content !=null) { | |
| finaldoublefadingSize =view.getFadingSize(); | |
| if (content.getTranslateX() <0) { | |
| leftClip.setFill(newLinearGradient(0,0,fadingSize,0,false,CycleMethod.NO_CYCLE,newStop(0,Color.TRANSPARENT),newStop(1,Color.BLACK))); | |
| }else { | |
| leftClip.setFill(Color.BLACK); | |
| } | |
| if (content.getTranslateX() +content.prefWidth(-1) >view.getWidth()) { | |
| rightClip.setFill(newLinearGradient(0,0,fadingSize,0,false,CycleMethod.NO_CYCLE,newStop(0,Color.BLACK),newStop(1,Color.TRANSPARENT))); | |
| }else { | |
| rightClip.setFill(Color.BLACK); | |
| } | |
| } | |
| view.requestLayout(); | |
| } | |
| @Override | |
| protectedvoidlayoutChildren(doublecontentX,doublecontentY,doublecontentWidth,doublecontentHeight) { | |
| finaldoublefadingSize =Math.min(contentWidth /2,getSkinnable().getFadingSize()); | |
| stackPane.resizeRelocate(snapPosition(contentX),snapPosition(contentY),snapSpace(contentWidth),snapSpace(contentHeight)); | |
| resizeRelocate(leftClip,snapPosition(contentX),snapPosition(contentY),snapSpace(fadingSize),snapSpace(contentHeight)); | |
| resizeRelocate(centerClip,snapPosition(contentX +fadingSize),snapPosition(contentY),snapSpace(contentWidth -2 *fadingSize),snapSpace(contentHeight)); | |
| resizeRelocate(rightClip,snapPosition(contentX +contentWidth -fadingSize),snapPosition(contentY),snapSpace(fadingSize),snapSpace(contentHeight)); | |
| } | |
| privatevoidresizeRelocate(Rectanglerect,doublex,doubley,doublew,doubleh) { | |
| rect.setLayoutX(x); | |
| rect.setLayoutY(y); | |
| rect.setWidth(w); | |
| rect.setHeight(h); | |
| } | |
| } |
Sign up for freeto join this conversation on GitHub. Already have an account?Sign in to comment