如果我创建一个public static class CarPartsLibary
{
public static string factoryId = "fgk4548j4t5jig3";
public static string engineId = "fgfgj34lk45l3lj";
public static string bodyId = "45kjgiu590dkjr";
public static bool typeCar = true;
public static bool autoStart = true;
public static bool allWheelDrive = true;
public static bool dieselEngine = false;
}
var car = CarPartsLibary.typeCar;
var factory = GetLocation(CarPartsLibary.factoryId);
(其中包含节点),如何在不在屏幕上呈现的情况下计算宽度/高度?
我正在尝试创建一个文档(在内存中)并将其发送到打印机。问题是,我需要计算需要多少页面以及 那样做 才能获得文档的维度。
我试验的一个简单例子:
Pane
我输出的所有内容都是Label testLabel1 = new Label("TEST1");
Label testLabel2 = new Label("TEST no. 2");
GridPane testGl = new GridPane();
testGl.add( testLabel1, 1, 1 );
testGl.add( testLabel2, 2, 2 );
VBox testVBox = new VBox( testGl );
Pane testPane = new Pane( testVBox );
//I read that this might be required
testPane.applyCss();
testPane.layout();
//Also that a delay is needed for the fx tread to update testPane
// (but shouldn't this all be in the same thread since it is in the same function?
// It doesn't seem to help).
Platform.runLater( ()->{
System.out.println( ">>> "+ testPane.getBoundsInLocal().getWidth() );
});
。请注意,在我正在开发的程序中,我在"容器内有多个>>> 0.0
" Pane
。因此,变量Pane
。
谢谢。
答案 0 :(得分:0)
您需要将Pane
添加到Scene
才能使布局正常工作。然而,无需显示Scene
,也无需在此场景中保留Pane
:
Label testLabel1 = new Label("TEST1");
Label testLabel2 = new Label("TEST no. 2");
GridPane testGl = new GridPane();
testGl.add(testLabel1, 1, 1);
testGl.add(testLabel2, 2, 2);
VBox testVBox = new VBox(testGl);
Pane testPane = new Pane(testVBox);
// add testPane to some scene before layouting
Scene testScene = new Scene(testPane);
testPane.applyCss();
testPane.layout();
System.out.println(">>> " + testPane.getBoundsInLocal().getWidth());
// Pane could be removed from scene
Group replacement = new Group();
testScene.setRoot(replacement);
请注意,如果要从Scene
中删除根,则必须将其替换为非空节点。