从JavaFX中移除所有焦点边框

Question

在使用JavaFX时，我发现焦点边框在一些可视化节点上存在障碍，比如按钮和某些窗格。关于这个主题的其他问题经常建议在样式文件中添加以下css（覆盖modena.css的默认值，JavaFX8的默认样式表）：

-fx-focus-color: transparent;
-fx-faint-focus-color: transparent;

我还发现，这个背景色来自前面提到的绘制边框的属性。因此，将颜色设置为透明会产生意想不到的效果，即某些节点（如窗格、组合框等）在不聚焦时显示边框，但在聚焦时不再显示边框，这是由于:focust伪类的背景色派生方式造成的。

是否可以移除焦点边框（和模糊焦点边框），这样当它们实际上聚焦时，它们仍然保持未聚焦元素的外观？

Answer 1

我编译了一个解决方案，通过重写modena的更多部分，结合我在SO上发现的内容来移除焦点边框：我选择用按钮类和窗格类的非焦点默认值的属性来重写“：Focused”伪类的属性（正如modena本身所述）。结果是：

.button:focused,
.toggle-button:focused,
.radio-button:focused > .radio,
.check-box:focused > .box,
.menu-button:focused,
.choice-box:focused,
.color-picker.split-button:focused > .color-picker-label,
.combo-box-base:focused,
.slider:focused .thumb {
    -fx-background-color: -fx-shadow-highlight-color, -fx-outer-border, -fx-inner-border, -fx-body-color;
    -fx-background-insets: 0 0 -1 0, 0, 1, 2;
    -fx-background-radius: 3px, 3px, 2px, 1px;
}

.scroll-pane:focused,
.split-pane:focused,
.list-view:focused,
.tree-view:focused,
.table-view:focused,
.tree-table-view:focused,
.html-editor:focused {
    -fx-background-color: -fx-box-border, -fx-control-inner-background;
    -fx-background-insets: 0, 1;
    -fx-padding: 1;
}

.radio-button > .radio, .radio-button:focused > .radio  {   
    -fx-background-radius: 1.0em; /* large value to make sure this remains circular */    
    -fx-padding: 0.333333em; /* 4 -- padding from outside edge to the inner black dot */ 
}
.split-menu-button:focused {
    -fx-background-color: -fx-shadow-highlight-color, -fx-outer-border; 
    -fx-background-insets: 0 0 -1 0, 0;
    -fx-background-radius: 3, 3;
}
.split-menu-button:focused > .label {
    -fx-text-fill: -fx-text-base-color;
    -fx-background-color: -fx-inner-border, -fx-body-color; 
    -fx-background-insets: 1 0 1 1, 2 1 2 2;
    -fx-background-radius: 2 0 0 2, 1 0 0 1;
    -fx-padding: 0.333333em 0.667em 0.333333em 0.667em; /* 4 8 4 8 */
}
.split-menu-button:focused > .arrow-button {
    -fx-background-color: -fx-inner-border, -fx-body-color; 
    -fx-background-insets: 1, 2;
    -fx-background-radius: 0 2 2 0, 0 1 1 0;
    -fx-padding: 0.5em 0.667em 0.5em 0.667em; /* 6 8 6 8 */
}

.scroll-bar:focused {
    -fx-background-color: derive(-fx-box-border,30%), linear-gradient(to bottom, derive(-fx-base,-3%), derive(-fx-base,5%) 50%, derive(-fx-base,-3%));
    -fx-background-insets: 0, 1 0 1 0;
}
.scroll-bar:vertical:focused {
    -fx-background-color: derive(-fx-box-border,30%), linear-gradient(to right, derive(-fx-base,-3%), derive(-fx-base,5%) 50%, derive(-fx-base,-3%));
    -fx-background-insets: 0, 0 1 0 1;
}

.text-input:focused {
    -fx-highlight-fill: -fx-accent;
    -fx-highlight-text-fill: white;
    -fx-background-color: linear-gradient(to bottom, derive(-fx-text-box-border, -10%), -fx-text-box-border),
        linear-gradient(from 0px 0px to 0px 5px, derive(-fx-control-inner-background, -9%), -fx-control-inner-background);
    -fx-background-insets: 0, 1;
    -fx-background-radius: 3, 2;
    -fx-prompt-text-fill: transparent;
}

.text-area:focused .content {
    -fx-background-color:
        linear-gradient(from 0px 0px to 0px 4px, derive(-fx-control-inner-background, -8%), -fx-control-inner-background);
    -fx-background-radius: 2;
}

.titled-pane:focused > .title > .arrow-button > .arrow {
    -fx-background-color: -fx-mark-highlight-color, -fx-mark-color;
    -fx-background-insets: 1 0 -1 0, 0;
}

.color-picker.split-button:focused > .arrow-button {
    -fx-background-color: -fx-outer-border, -fx-inner-border, -fx-body-color;
    -fx-background-insets: 1 1 1 0, 1, 2;
    -fx-background-radius: 0 3 3 0, 0 2 2 0, 0 1 1 0;
}

基本上，不管UI节点是否有焦点，它都会改变背景颜色的呈现，以绘制相同的外观和感觉。