这是一个交叉帖子:http://mail.openjdk.java.net/pipermail/openjfx-dev/2015-January/016437.html
有时当我设置SplitPane的分隔符位置时 以编程方式,我的值被一些JavaFX内部布局再次覆盖 代码。
出于调试目的,我已经添加了一个监听器的position属性 divider并抛出一个RuntimeException来查看堆栈跟踪。它看起来 像这样:
at
com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:361)
at
com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at
javafx.beans.property.DoublePropertyBase.fireValueChangedEvent(DoublePropertyBase.java:106)
at
javafx.beans.property.DoublePropertyBase.markInvalid(DoublePropertyBase.java:113)
at
javafx.beans.property.DoublePropertyBase.set(DoublePropertyBase.java:146)
at javafx.scene.control.SplitPane$Divider.setPosition(SplitPane.java:486)
at
com.sun.javafx.scene.control.skin.SplitPaneSkin.setAbsoluteDividerPos(SplitPaneSkin.java:310)
at
com.sun.javafx.scene.control.skin.SplitPaneSkin.setupContentAndDividerForLayout(SplitPaneSkin.java:502)
at
com.sun.javafx.scene.control.skin.SplitPaneSkin.layoutChildren(SplitPaneSkin.java:817)
at javafx.scene.control.Control.layoutChildren(Control.java:589)
at javafx.scene.Parent.layout(Parent.java:1074)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Parent.layout(Parent.java:1080)
at javafx.scene.Scene.doLayoutPass(Scene.java:532)
at javafx.scene.Scene$ScenePulseListener.pulse(Scene.java:2363)
at com.sun.javafx.tk.Toolkit.lambda$runPulse$28(Toolkit.java:314)
at com.sun.javafx.tk.Toolkit$$Lambda$230/25595560.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.Toolkit.runPulse(Toolkit.java:313)
at com.sun.javafx.tk.Toolkit.firePulse(Toolkit.java:340)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:451)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(QuantumToolkit.java:431)
at
com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$363(QuantumToolkit.java:298)
at
com.sun.javafx.tk.quantum.QuantumToolkit$$Lambda$59/174792896.run(Unknown
Source)
at
com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at
com.sun.glass.ui.gtk.GtkApplication.lambda$null$45(GtkApplication.java:126)
at com.sun.glass.ui.gtk.GtkApplication$$Lambda$55/1472148546.run(Unknown
Source)
at java.lang.Thread.run(Thread.java:745)
它似乎没有被我的一些代码触发(至少不是直接触发) 根据堆栈跟踪)。
我尝试了几件事,包括设置prefWidth / prefHeight 项目达到预期值,但我无法有效地停止SplitPane 在重新布局期间“隐藏”第一个和第三个(最后一个)项目。
在layoutChildren调用期间,两个分隔符发生了变化,如下所示:
分频器位置已更改:旧值:0.10857763300760044,新值: 0.004343105320304018
分频器位置已更改:旧值:0.8914223669923995,新值: 0.995656894679696
我看了一下com.sun.javafx.scene.control.skin.SplitPaneSkin(来源) 随JDK提供的代码),但不幸的是,它看起来并不容易 在这种情况下计算面积。
为什么这种重新布局在这里讨价还价? 为什么它会覆盖我为分频器位置设置的值? 怎么能阻止这个?
我曾尝试编写SSCCE,但我还是无法使用简单的示例重现该问题。 (问题发生在自定义控件的Skin实现中。)
更新
有问题的SplitPane的3个项目(控件的子类)(方向:垂直)具有以下最小和最大高度:
property: height min: -1.0 ; max: -1.0
property: height min: -1.0 ; max: -1.0
property: height min: -1.0 ; max: -1.0
AFAIK这是Region.USE_COMPUTED_SIZE的价值。
我将最大值更改为Double.MAX_VALUE
:
property: height min: -1.0 ; max: 1.7976931348623157E308
property: height min: -1.0 ; max: 1.7976931348623157E308
property: height min: -1.0 ; max: 1.7976931348623157E308
但我仍然遇到同样的问题。
更新2
我终于设法创建了一个SSCCE:
package splitpanelayoutissue;
import javafx.application.Application;
import javafx.geometry.Orientation;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.SplitPane;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class SplitPaneLayoutIssue extends Application {
private static final double DIVIDER_POSITION_0 = 0.10834236186348863;
private static final double DIVIDER_POSITION_1 = 0.8916576381365114;
@Override
public void start(Stage primaryStage) {
SplitPane outerSplitPane = createOuterSplitPane();
StackPane root = new StackPane();
root.getChildren().add(outerSplitPane);
Scene scene = new Scene(root, 1500, 1000);
primaryStage.setTitle("SplitPane Layout Issue");
primaryStage.setScene(scene);
primaryStage.show();
}
private SplitPane createOuterSplitPane() {
SplitPane outerSplitPane = createSplitPane("outerSplitPane");
TabPane leftTabPane = addTabPane(outerSplitPane, "Left");
SplitPane innerSplitPane = createInnerSplitPane();
outerSplitPane.getItems().add(innerSplitPane);
TabPane rightTabPane = addTabPane(outerSplitPane, "Right");
SplitPane.setResizableWithParent(leftTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(rightTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(innerSplitPane, Boolean.TRUE);
setDividerPositions(outerSplitPane, innerSplitPane);
leftTabPane.getTabs().get(0).setOnClosed(event -> {
// the following line causes com.sun.javafx.scene.control.skin.SplitPaneSkin.Content.getArea()
// of all 3 items return 0, even though setDividerPositions is called before the next SplitPane.layoutChildren call
innerSplitPane.getItems().setAll(innerSplitPane.getItems().get(0),innerSplitPane.getItems().get(1),innerSplitPane.getItems().get(2));
outerSplitPane.getItems().setAll(innerSplitPane, rightTabPane);
setDividerPositions(outerSplitPane, innerSplitPane);
});
return outerSplitPane;
}
private SplitPane createSplitPane(String name) {
SplitPane splitPane = new SplitPane() {
@Override
protected void layoutChildren() {
System.out.println("Calling relayout on " + name + "...");
com.sun.javafx.scene.control.skin.SplitPaneSkin skin = (com.sun.javafx.scene.control.skin.SplitPaneSkin) getSkin();
super.layoutChildren();
}
};
return splitPane;
}
private void setDividerPositions(SplitPane outerSplitPane, SplitPane innerSplitPane) {
System.out.println("Set divider positions...");
System.out.println("Set divider position 0 of outerSplitPane...");
outerSplitPane.setDividerPosition(0, outerSplitPane.getItems().size() == 3 ? DIVIDER_POSITION_0
: DIVIDER_POSITION_1);
if (outerSplitPane.getItems().size() == 3) {
System.out.println("Set divider position 1 of outerSplitPane...");
outerSplitPane.setDividerPosition(1, DIVIDER_POSITION_1);
}
System.out.println("Set divider position 0 of innerSplitPane...");
innerSplitPane.setDividerPosition(0, DIVIDER_POSITION_0);
System.out.println("Set divider position 1 of innerSplitPane...");
innerSplitPane.setDividerPosition(1, DIVIDER_POSITION_1);
}
private TabPane addTabPane(SplitPane splitPane, String label) {
TabPane tabPane = new TabPane();
// tabPane.setFocusTraversable(false);
Tab tab = new Tab(label);
tab.setContent(new Label(label));
tabPane.getTabs().add(tab);
splitPane.getItems().add(tabPane);
return tabPane;
}
private SplitPane createInnerSplitPane() {
SplitPane innerSplitPane = createSplitPane("innerSplitPane");
innerSplitPane.setOrientation(Orientation.VERTICAL);
TabPane topTabPane = addTabPane(innerSplitPane, "Top");
TabPane centerTabPane = addTabPane(innerSplitPane, "Center");
TabPane bottomTabPane = addTabPane(innerSplitPane, "Bottom");
SplitPane.setResizableWithParent(topTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(bottomTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(centerTabPane, Boolean.TRUE);
return innerSplitPane;
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
如果关闭左侧选项卡,则顶部和底部选项卡将隐藏(大小为0),尽管在layoutChildren()调用之前设置了分隔符位置(请参阅输出)。
我遇到这种情况,因为我需要在代码中重置splitPane的项目。另请注意,这些项具有不同的resizableWithParent属性。
更新3
这是一个只有一个SplitPane的小型SSCCE。当您按“增长宽度”按钮时,您将看到相同的效果。
package splitpanelayoutissue;
import javafx.application.Application;
import javafx.geometry.Orientation;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.SplitPane;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class SplitPaneLayoutIssue2 extends Application {
private static final double DIVIDER_POSITION_0 = 0.10834236186348863;
private static final double DIVIDER_POSITION_1 = 0.8916576381365114;
@Override
public void start(Stage primaryStage) {
SplitPane splitPane = createSplitPane();
StackPane root = new StackPane();
root.getChildren().add(splitPane);
Scene scene = new Scene(root, 1500, 1000);
primaryStage.setTitle("SplitPane Layout Issue");
primaryStage.setScene(scene);
primaryStage.show();
}
private SplitPane createSplitPane(String name) {
SplitPane splitPane = new SplitPane() {
@Override
protected void layoutChildren() {
System.out.println("Calling relayout on " + name + "...");
com.sun.javafx.scene.control.skin.SplitPaneSkin skin = (com.sun.javafx.scene.control.skin.SplitPaneSkin) getSkin();
super.layoutChildren();
}
};
return splitPane;
}
private void setDividerPositions(SplitPane innerSplitPane) {
System.out.println("Set divider positions...");
System.out.println("Set divider position 0 of innerSplitPane...");
innerSplitPane.setDividerPosition(0, DIVIDER_POSITION_0);
System.out.println("Set divider position 1 of innerSplitPane...");
innerSplitPane.setDividerPosition(1, DIVIDER_POSITION_1);
}
private TabPane addTabPane(SplitPane splitPane, String label) {
TabPane tabPane = new TabPane();
// tabPane.setFocusTraversable(false);
Tab tab = new Tab(label);
tab.setContent(new Label(label));
tabPane.getTabs().add(tab);
splitPane.getItems().add(tabPane);
return tabPane;
}
private SplitPane createSplitPane() {
SplitPane splitPane = createSplitPane("splitPane");
splitPane.setOrientation(Orientation.VERTICAL);
TabPane topTabPane = addTabPane(splitPane, "Top");
TabPane centerTabPane = new TabPane();
// tabPane.setFocusTraversable(false);
Tab tab = new Tab("Center");
Button button = new Button("Grow width");
tab.setContent(button);
button.setOnAction(event -> {
System.out.println("Growing window width...");
// the following line causes com.sun.javafx.scene.control.skin.SplitPaneSkin.Content.getArea()
// of all 3 items return 0, even though setDividerPositions is called before the next SplitPane.layoutChildren call
// Without this line the code works fine.
splitPane.getItems().setAll(splitPane.getItems().get(0), splitPane.getItems().get(1), splitPane.getItems().get(2));
// This line is needed to trigger the execution path in question
splitPane.getScene().getWindow().setWidth(splitPane.getScene().getWindow().getWidth() + 20.0);
setDividerPositions(splitPane);
});
centerTabPane.getTabs().add(tab);
splitPane.getItems().add(centerTabPane);
TabPane bottomTabPane = addTabPane(splitPane, "Bottom");
setDividerPositions(splitPane);
SplitPane.setResizableWithParent(topTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(bottomTabPane, Boolean.FALSE);
SplitPane.setResizableWithParent(centerTabPane, Boolean.TRUE);
return splitPane;
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
这是一个JavaFX错误还是我可以以某种方式影响的东西?
答案 0 :(得分:2)
我认为堆栈跟踪的重要部分是:
com.sun.javafx.scene.control.skin.SplitPaneSkin.setAbsoluteDividerPos(SplitPaneSkin.java:310) 在 com.sun.javafx.scene.control.skin.SplitPaneSkin.setupContentAndDividerForLayout(SplitPaneSkin.java:502) 在 com.sun.javafx.scene.control.skin.SplitPaneSkin.layoutChildren(SplitPaneSkin.java:817)
正如您所看到的,SplitFane的JavaFX默认布局机制(layoutChildren())以一种可能影响分隔符位置的方式实现。在layoutChildren()方法的一些内部if语句中调用setupContentAndDividerForLayout()方法。因此,我将调试此方法并检查调用setupContentAndDividerForLayout()的原因。通过这样做,您可以找到SplitPane认为必须更改分隔符位置的原因。
答案 1 :(得分:1)
这似乎是最近在JavaFX中引入的内容。我在Windows 7上使用Java 8u20(b26)和Java 8u40ea(早期采用者)(b23)进行了测试。
使用你的SSCCE,我看到使用Java 8u20,如果我将窗口的高度调整为更小,然后单击Grow Width,则上下标签保持与之前相同的高度。
如果我使用Java 8u40ea做同样的事情,当我将窗口调整为较小并随后单击按钮时,上部和下部选项卡会将其自身的高度调整为较小。如果我再次调整窗口大小,当我单击按钮时,标签会再次调整为大(如前所述)。
听起来像JavaFX家伙打开的东西;我个人在几天前亲自提交了一份SSCCE,他们反应灵敏。
答案 2 :(得分:0)
由于它似乎是一个JavaFX问题,我在此处提出了一个问题:https://javafx-jira.kenai.com/browse/RT-40031
<强>更新强>
该问题可以重现,但已在即将发布的JavaFX 8u40版本中得到修复。