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GridBagLayout 例


发布日期:2019年05月14日
 
GridBagLayout 例

import javaawtDimension;import javaawtGridBagConstraints;import javaawtGridBagLayout;import javaawtGridLayout;import javaawtInsets;import javaxswing*;public class Layout {

/**

* @param args

*/

public static void main(String[] args) {

new LayoutFrame()setVisible(true)

}}class LayoutFrame extends JFrame {

LayoutFrame(){

thissetTitle(Layout Test

thissetSize(

thissetDefaultCloseOperation(JFrameEXIT_ON_CLOSE)

JPanel jp = new JPanel()

jpsetLayout(new GridBagLayout())

jpadd(new JScrollPane(new JTextArea())new Constraint())

JPanel p = new JPanel()

psetLayout(new GridLayout())

psetBorder(BorderFactorycreateEtchedBorder())

padd(new JLabel(标 签))

padd(new JTextField())

jpadd(pnew Constraint())

jpadd(new MPanel()new Constraint())

jpadd(new MPanel()new Constraint())

JPanel p = new JPanel()

psetLayout(new GridLayout())

psetBorder(BorderFactorycreateEtchedBorder())

padd(new JButton(按钮))

padd(new JButton(按钮))

jpadd(pnew Constraint())

jpadd(new MPanel()new Constraint())

jpadd(new MPanel()new Constraint())

jpadd(new JScrollPane(new JTextArea())new Constraint())

MPanel mp = new MPanel()

/*mpadd(new JButton(hellp))

mpadd(new JButton(hellp))

mpadd(new JButton(hellp))

mpadd(new JButton(hellp))*/

jpadd(mpnew Constraint())

jpadd(new MPanel()new Constraint())

jpadd(new MPanel()new Constraint())

add(jp)

}}class MPanel extends JPanel {

MPanel(){

/*Dimension d = new Dimension(

//thissetPreferredSize(new Dimension())

thissetMaximumSize(d)

thissetMinimumSize(d)*/

add(new JLabel(面板))

thissetBorder(BorderFactorycreateEtchedBorder())

}}class Constraint extends GridBagConstraints {

Constraint(int gridxint gridy) {

thisgridx = gridx; //gridxgridy 指表格坐标指此物件的开始位置在(xy)处也即在 x列y行处 xy 都从开始

thisgridy = gridy;

thissetFill(ConstraintBOTH) //默认物作是居中的设成both后如果物件比所占area小就会在横竖两个方向拉伸

//thissetWeight( //空白区域怎么分配

thissetInsets(//边界

}

Constraint(int gridxint gridyint gridheightint gridwidth) {

this(gridxgridy)

//高和宽指物件占用的空间 四个参数可理解 了 xydydx

thisgridheight = gridheight;

thisgridwidth = gridwidth;

}

public Constraint setFill(int fill) {

thisfill = fill;

return this;

}

public Constraint setAnchor(int anchor) {

thisanchor = anchor; //是指物件放在所在区域的什么位置默认是center CENTER NORTH NORTHEAST EAST SOUTHEAST SOUTH SOUTHWEST WEST

//and NORTHWEST The relative values are: PAGE_START PAGE_END LINE_START LINE_END FIRST_LINE_START FIRST_LINE_END LAST_LINE_START and LAST_LINE_END The default value is CENTER

return this;

}

public Constraint setWeight(double weightxdouble weighty) {

thisweightx = weightx;

thisweighty = weighty;

return this;

}

public Constraint setInsets(int distance){

thisinsets = new Insets(distancedistancedistancedistance)

return this;

}}

               

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