我是 SWT 新手，但对其他 GUI 布局管理器有丰富的经验。在将复合材料嵌套在另一个复合材料中时，我遇到了一个奇怪的问题。
http://www.swooby.com/swt/nestedcontrolproblem.png
如果我将 audiocontrol 作为独立 bean 运行，它可以正常工作。
如果我将它嵌套在另一个复合材料中运行，它就会开始变得有趣。
当我将此组合添加到更复杂的父级（6 列）时，嵌套组合似乎没有正确遵守其自己的类定义的水平跨度。
音频控件在不太复杂的父级（共 2 列）中布局良好。
我正在使用 Eclipse 可视化编辑器来布置这些，所以我没有编写任何我自己的代码来改变布局（除了将 Composite 类型更改为 CompositeAudio）。
重现此代码：Parent.java
package com.twistpair.qa;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
public class Parent extends Composite {
private AudioControl compositeAudio = null;
public Parent(Composite parent, int style) {
super(parent, style);
initialize();
}
private void initialize() {
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 2;
this.setLayout(gridLayout);
createCompositeAudio();
setSize(new Point(97, 673));
}
/**
* This method initializes compositeAudio
*
*/
private void createCompositeAudio() {
GridData gridData = new GridData();
gridData.horizontalAlignment = GridData.CENTER;
gridData.grabExcessHorizontalSpace = false;
gridData.grabExcessVerticalSpace = false;
gridData.horizontalSpan = 2;
gridData.verticalAlignment = GridData.CENTER;
compositeAudio = new AudioControl(this, SWT.NONE);
compositeAudio.setLayout(new GridLayout());
compositeAudio.setLayoutData(gridData);
}
} // @jve:decl-index=0:visual-constraint="36,7"
音频控制.java：
package com.twistpair.qa;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.custom.CLabel;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Scale;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.widgets.Display;
public class AudioControl extends Composite {
private CLabel cLabelAudio = null;
private Button checkBoxRunning = null;
private CLabel cLabelVolume = null;
private Scale scaleVolumeLeft = null;
private CLabel cLabelVuMeter = null;
private Canvas canvasVuMeterLeft = null;
private Button checkBoxMuteRx = null;
private Button checkBoxMuteTx = null;
private Button checkBoxMuteBoth = null;
private Scale scaleVolumeRight = null;
private Canvas canvasVuMeterRight = null;
public AudioControl(Composite parent, int style) {
super(parent, style);
initialize();
}
private void initialize() {
GridData gridData31 = new GridData();
gridData31.horizontalAlignment = GridData.CENTER;
gridData31.verticalAlignment = GridData.CENTER;
GridData gridData21 = new GridData();
gridData21.horizontalAlignment = GridData.CENTER;
gridData21.verticalAlignment = GridData.CENTER;
GridData gridData11 = new GridData();
gridData11.horizontalSpan = 2;
GridData gridData5 = new GridData();
gridData5.horizontalSpan = 2;
gridData5.verticalAlignment = GridData.CENTER;
gridData5.horizontalAlignment = GridData.CENTER;
GridData gridData4 = new GridData();
gridData4.horizontalSpan = 2;
gridData4.verticalAlignment = GridData.CENTER;
gridData4.horizontalAlignment = GridData.CENTER;
GridData gridData3 = new GridData();
gridData3.horizontalSpan = 2;
gridData3.verticalAlignment = GridData.CENTER;
gridData3.horizontalAlignment = GridData.CENTER;
GridData gridData2 = new GridData();
gridData2.horizontalSpan = 2;
GridData gridData1 = new GridData();
gridData1.horizontalSpan = 2;
GridData gridData = new GridData();
gridData.horizontalSpan = 2;
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 2;
cLabelAudio = new CLabel(this, SWT.NONE);
cLabelAudio.setText("Audio");
cLabelAudio.setFont(new Font(Display.getDefault(), "Segoe UI", 9, SWT.BOLD));
cLabelAudio.setLayoutData(gridData5);
checkBoxRunning = new Button(this, SWT.CHECK);
checkBoxRunning.setText("Running");
checkBoxRunning.setLayoutData(gridData11);
cLabelVolume = new CLabel(this, SWT.NONE);
cLabelVolume.setText("Volume");
cLabelVolume.setFont(new Font(Display.getDefault(), "Segoe UI", 9, SWT.BOLD));
cLabelVolume.setLayoutData(gridData4);
scaleVolumeLeft = new Scale(this, SWT.VERTICAL);
scaleVolumeLeft.setLayoutData(gridData21);
scaleVolumeRight = new Scale(this, SWT.VERTICAL);
scaleVolumeRight.setLayoutData(gridData31);
cLabelVuMeter = new CLabel(this, SWT.NONE);
cLabelVuMeter.setText("VU Meter");
cLabelVuMeter.setFont(new Font(Display.getDefault(), "Segoe UI", 9, SWT.BOLD));
cLabelVuMeter.setLayoutData(gridData3);
createCanvasVuMeterLeft();
this.setLayout(gridLayout);
this.setSize(new Point(151, 415));
createCanvasVuMeterRight();
checkBoxMuteRx = new Button(this, SWT.CHECK);
checkBoxMuteRx.setText("Mute RX");
checkBoxMuteRx.setLayoutData(gridData);
checkBoxMuteTx = new Button(this, SWT.CHECK);
checkBoxMuteTx.setText("Mute TX");
checkBoxMuteTx.setLayoutData(gridData1);
checkBoxMuteBoth = new Button(this, SWT.CHECK);
checkBoxMuteBoth.setText("Mute Both");
checkBoxMuteBoth.setLayoutData(gridData2);
}
/**
* This method initializes canvasVuMeterLeft
*
*/
private void createCanvasVuMeterLeft() {
canvasVuMeterLeft = new Canvas(this, SWT.BORDER);
}
/**
* This method initializes canvasVuMeterRight
*
*/
private void createCanvasVuMeterRight() {
canvasVuMeterRight = new Canvas(this, SWT.BORDER);
}
} // @jve:decl-index=0:visual-constraint="10,10"
我的另一个问题是音频控件最初在两个 VU（左/右）画布下方有三个“静音 *”复选框。在一个不太复杂的父级中，布局主要是表现出来的，但是 VU 画布下方的三个复选框没有被创建。我使用了一个间谍程序来浏览正在运行的 UI，并且控件确实不存在。代码确实有我可以操作的有效对象。我认为这很奇怪，似乎只是通过移动复选框暂时解决了问题，但我认为这可能表明我的音频控制有问题。
有没有人看到过这两个问题？我搜索了网络和stackoverflow，没有看到任何直接相关的内容。
谢谢！
光伏