问题描述
例如:
GridLayout layout = new GridLayout(1,false);
layout.horizontalSpacing = 0;
layout.verticalSpacing = 0;
shell.setText("Layout");
shell.setMaximized(true);
shell.setimage(imghandler.getCornerimg());
shell.setLayout(layout);
Composite mainComp = new Composite(shell,SWT.NONE);
data = new GridData(SWT.FILL,SWT.FILL,true,true);
layout.numColumns = 2;
mainComp.setLayout(layout);
mainComp.setLayoutData(data);
mainComp.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
Composite subComp1 = new Composite(mainComp,true);
layout.numColumns = 1;
subComp1.setLayout(layout);
subComp1.setLayoutData(data);
subComp1.setBackground(display.getSystemColor(SWT.COLOR_CYAN));
Composite subComp2 = new Composite(mainComp,true);
subComp2.setLayout(layout);
subComp2.setLayoutData(data);
subComp2.setBackground(display.getSystemColor(SWT.COLOR_GREEN));
Composite subComp3 = new Composite(mainComp,2,1);
layout.numColumns = 2;
subComp3.setLayout(layout);
subComp3.setLayoutData(data);
subComp3.setBackground(display.getSystemColor(SWT.COLOR_magenta));
shell.pack();
shell.open();
我想删除 shell 和 mainComp 之间以及 mainComp 和 subComps 之间的间距。有什么想法吗?
解决方法
在 GridLayout
中设置边距高度和宽度:
layout.marginWidth = 0;
layout.marginHeight = 0;
注意:您还应该为每个 GridLayout
使用一个新的 Composite
我建议为此使用 Netbeans 表单设计器。我用 Netbeans 做了一个例子,你会注意到父面板有黑色背景,根本不可见
public class GridSpacing extends javax.swing.JPanel {
public GridSpacing() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
java.awt.GridBagConstraints gridBagConstraints;
pnlParent = new javax.swing.JPanel();
pnlTurquoise = new javax.swing.JPanel();
pnlPink = new javax.swing.JPanel();
pnlGreen = new javax.swing.JPanel();
setLayout(new java.awt.GridBagLayout());
pnlParent.setBackground(new java.awt.Color(0,0));
pnlParent.setLayout(new java.awt.GridBagLayout());
pnlTurquoise.setBackground(new java.awt.Color(0,255,204));
javax.swing.GroupLayout pnlTurquoiseLayout = new javax.swing.GroupLayout(pnlTurquoise);
pnlTurquoise.setLayout(pnlTurquoiseLayout);
pnlTurquoiseLayout.setHorizontalGroup(
pnlTurquoiseLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,200,Short.MAX_VALUE)
);
pnlTurquoiseLayout.setVerticalGroup(
pnlTurquoiseLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,150,Short.MAX_VALUE)
);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.weighty = 1.0;
pnlParent.add(pnlTurquoise,gridBagConstraints);
pnlPink.setBackground(new java.awt.Color(255,255));
javax.swing.GroupLayout pnlPinkLayout = new javax.swing.GroupLayout(pnlPink);
pnlPink.setLayout(pnlPinkLayout);
pnlPinkLayout.setHorizontalGroup(
pnlPinkLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,400,Short.MAX_VALUE)
);
pnlPinkLayout.setVerticalGroup(
pnlPinkLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,Short.MAX_VALUE)
);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 1;
gridBagConstraints.gridwidth = 2;
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.weighty = 1.0;
pnlParent.add(pnlPink,gridBagConstraints);
pnlGreen.setBackground(new java.awt.Color(51,51));
javax.swing.GroupLayout pnlGreenLayout = new javax.swing.GroupLayout(pnlGreen);
pnlGreen.setLayout(pnlGreenLayout);
pnlGreenLayout.setHorizontalGroup(
pnlGreenLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,Short.MAX_VALUE)
);
pnlGreenLayout.setVerticalGroup(
pnlGreenLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0,Short.MAX_VALUE)
);
gridBagConstraints = new java.awt.GridBagConstraints();
gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
gridBagConstraints.weightx = 1.0;
gridBagConstraints.weighty = 1.0;
pnlParent.add(pnlGreen,gridBagConstraints);
add(pnlParent,new java.awt.GridBagConstraints());
}// </editor-fold>
// Variables declaration - do not modify
private javax.swing.JPanel pnlGreen;
private javax.swing.JPanel pnlParent;
private javax.swing.JPanel pnlPink;
private javax.swing.JPanel pnlTurquoise;
// End of variables declaration
}