更改 JavaFX MenuButton 图标

Change JavaFX MenuButton Icon

有没有一种简单的方法可以将 JavaFX MenuButton 箭头更改为字符或完全隐藏它?

MenuButton hamburgerMenu = new MenuButton("\u2630");
hamburgerMenu.getItems().addAll(new MenuItem("Ham"), new MenuItem("Buger"));

添加如下样式隐藏箭头

.menu-button > .arrow-button > .arrow {
    -fx-background-color: transparent;
}

结果

您还可以使用 -fx-shape 后跟 SVG 路径来定义不同的 SHAPE。

.menu-button > .arrow-button > .arrow {
    -fx-shape: "M 0 -3.5 v 7 l 4 -3.5 z";
}

输出为

有几种方法可以做到这一点,这里有四种。代码是带有 JavaFX 的 Jython。您可以编辑此代码以满足您的需要。


First, the enum, for context.

public enum URLBarArrowConstants {
     //URLBarArrow Constants
     BYCSS_AND_SHAPE,
     BYCSS_AND_NO_SHAPE,
     NOCSS_AND_SHAPE,
     NOCSS_AND_NO_SHAPE;
}

Second, the css files, for context.

EG#1

/*ComboBox's Arrow is a Region.*/
.menu-button .arrow-button .arrow {
     -fx-shape: "...";
     -fx-scale-shape: true;
     -fx-position-shape: true;
}

EG#2

/*ComboBox's Arrow is a Region.*/
.menu-button .arrow-button .arrow {
    /*Setting either of these two will do.*/
     -fx-background-color: transparent; 
     -fx-opacity: 0.0;  
}

/*ComboBox's Arrow Button is a Stack Pane.*/
.menu-button .arrow-button{
    -fx-background-position: center;
    -fx-background-repeat: no-repeat;
    -fx-background-image: url("..<file>.png");
}

The method, in my main file.

def setCustomURLBarArrow(self, url_bar, scene, URLBarArrowConstant):
    from javafx.scene.paint import Paint
    from javafx.scene.shape import Shape, SVGPath, FillRule

不要通过 CSS 配置 ComboBox Arrow,而是以编程方式进行配置并更改 Regions SVG Shape

if URLBarArrowConstant == URLBarArrowConstants.NOCSS_AND_SHAPE:

    #SVG Object
    previous_url_bar = SVGPath()

    #SVG Path
    previous_url_bar.setContent("...") # edit this 

    #SVG Fill Rule
    previous_url_bar.setFillRule(FillRule.NON_ZERO)

    #Set Fill -- 
    previous_url_bar.setFill(Paint.valueOf(Color.web("...").toString())) //edit here

    #Apply CSS Sheet
    url_bar.applyCss()

    #Set Region's Shape
    arrow_region = url_bar.lookup(".arrow").setShape(previous_url_bar)

通过 CSS 配置组合框箭头并更改区域 SVG 形状

elif URLBarArrowConstant == URLBarArrowConstants.BYCSS_AND_SHAPE:
    #Apply Stylesheet for URL Bar
    scene.getStylesheets().add(File("..<file>.css").toURI().toString()) //edit here

通过 CSS 配置 ComboBox 箭头,但仅通过设置 transparency/opacity 值并设置背景来隐藏箭头。

elif URLBarArrowConstant == URLBarArrowConstants.BYCSS_AND_NO_SHAPE:
    #Apply Stylesheet for URL Bar
    scene.getStylesheets().add(File("..<file>.css").toURI().toString()) //edit here

不要通过 CSS 配置 ComboBox 箭头,而是以编程方式进行配置,仅通过设置 transparency/opacity 值和设置背景来隐藏箭头。

elif URLBarArrowConstant == URLBarArrowConstants.NOCSS_AND_NO_SHAPE:

    from javafx.scene.paint import Paint
    from javafx.scene.layout import CornerRadii
    from javafx.scene.layout import Background, BackgroundSize, BackgroundImage, BackgroundPosition, BackgroundRepeat, BackgroundFill

    #Apply CSS Sheet
    url_bar.applyCss()

    #Grab Arrow(Region), ArrowButton(StackPane) ComboBox properties
    arrow_region = url_bar.lookup(".arrow")
    arrow_button = url_bar.lookup(".arrow-button")

    #Either Set Opacity to 0 or set background color to transparent.
    arrow_region.setOpacity(0.0)
    arrow_region.setBackground( Background( array(BackgroundFill, [BackgroundFill( Paint.valueOf(Color.TRANSPARENT.toString()), CornerRadii.EMPTY, Insets.EMPTY)]) ) )

    #Set a Background Image for the .arrow-button StackPane.
    arrow_button.setBackground(Background( array(BackgroundImage, [BackgroundImage( Image( String(File('..<file>.png').toURI().toString()), True) , BackgroundRepeat.NO_REPEAT, BackgroundRepeat.NO_REPEAT, BackgroundPosition.CENTER, BackgroundSize.DEFAULT)] ) ) )       //if you want, edit this