The simulation BorderLayout layout _java programming of SWT (JFace) Experience

There is no AWT borderlayout layout manager in SWT. Here is the custom implementation under SWT:
Borderlayout.java

Copy Code code as follows:

Package Swt_jface.demo2;
Import Org.eclipse.swt.SWT;
Import Org.eclipse.swt.graphics.Point;
Import Org.eclipse.swt.graphics.Rectangle;
Import Org.eclipse.swt.widgets.Composite;
Import Org.eclipse.swt.widgets.Control;
Import Org.eclipse.swt.widgets.Layout;
public class BorderLayout extends Layout {
public static final int north = 0;
public static final int SOUTH = 1;
public static final int CENTER = 2;
public static final int = 3;
public static final int west = 4;
public static class Borderdata {

public int region = CENTER;
Public Borderdata () {
}
Public Borderdata (int region) {
this.region = region;
}
}
Public control[] Controls = new CONTROL[5];
Point[] sizes;
int width;
int height;
Protected point computesize (composite composite, int whint, int hhint, Boolean flushcache) {

if (sizes = NULL | | flushcache = = TRUE)
Refreshsizes (Composite.getchildren ());
int w = whint;
int h = hhint;
if (w = = SWT. DEFAULT) w = width;
if (h = = SWT. DEFAULT) h = height;
Return to New Point (W, h);
}
protected void layout (composite composite, Boolean Flushcache) {
if (Flushcache | | sizes = NULL)
Refreshsizes (Composite.getchildren ());
Rectangle Clientarea = Composite.getclientarea ();
if (Controls[north]!= null) {
Controls[north].setbounds (
Clientarea.x,
CLIENTAREA.Y,
Clientarea.width,
SIZES[NORTH].Y);
}
if (Controls[south]!= null) {
Controls[south].setbounds (
Clientarea.x,
CLIENTAREA.Y + CLIENTAREA.HEIGHT-SIZES[SOUTH].Y,
Clientarea.width,
SIZES[SOUTH].Y);
}
if (Controls[west]!= null) {
Controls[west].setbounds (
Clientarea.x,
CLIENTAREA.Y + SIZES[NORTH].Y,
Sizes[west].x,
CLIENTAREA.HEIGHT-SIZES[NORTH].Y-SIZES[SOUTH].Y);
}
if (Controls[east]!= null) {
Controls[east].setbounds (
Clientarea.x + clientarea.width-sizes[east].x,
CLIENTAREA.Y + SIZES[NORTH].Y,
Sizes[east].x,
CLIENTAREA.HEIGHT-SIZES[NORTH].Y-SIZES[SOUTH].Y);
}
if (Controls[center]!= null) {
Controls[center].setbounds (
Clientarea.x + sizes[west].x,
CLIENTAREA.Y + SIZES[NORTH].Y,
Clientarea.width-sizes[west].x-sizes[east].x,
CLIENTAREA.HEIGHT-SIZES[NORTH].Y-SIZES[SOUTH].Y);
}
}
private void refreshsizes (control[] children) {

for (int i = 0; i < children.length; i++) {
Object layoutdata = Children[i].getlayoutdata ();
if (Layoutdata = null | | (! (Layoutdata instanceof Borderdata)))
Continue
Borderdata Borderdata = (borderdata) layoutdata;
if (Borderdata.region < 0 | | borderdata.region > 4)//Invalid.
Continue
Controls[borderdata.region] = Children[i];
}
width = 0;
Height = 0;
if (sizes = null)
Sizes = new Point[5];
for (int i = 0; i < controls.length; i++) {
Control control = Controls[i];
if (control = = null) {
Sizes[i] = new Point (0, 0);
} else {
Sizes[i] = control.computesize (SWT. DEFAULT, SWT. DEFAULT, True);
}
}
width = Math.max (width, sizes[north].x);
width = Math.max (width, sizes[west].x + sizes[center].x + sizes[east].x);
width = Math.max (width, sizes[south].x);
Height = Math.max (Math.max (SIZES[WEST].Y, sizes[east].y), SIZES[CENTER].Y)
+ SIZES[NORTH].Y
+ sizes[south].y;
}
}

Test code:
Borderlayoutsample.java

Copy Code code as follows:

Package Swt_jface.demo2;
Import Org.eclipse.swt.SWT;
Import Org.eclipse.swt.widgets.Button;
Import Org.eclipse.swt.widgets.Display;
Import Org.eclipse.swt.widgets.Shell;
Import Org.eclipse.swt.widgets.Text;
public class Borderlayoutsample {

Display display = new display ();
Shell shell = new shell (display);
Public Borderlayoutsample () {

Shell.setlayout (New BorderLayout ());

Button buttonwest = New button (Shell, SWT. PUSH);
Buttonwest.settext ("West");
Buttonwest.setlayoutdata (New Borderlayout.borderdata (borderlayout.west));

Button Buttoneast = New button (Shell, SWT. PUSH);
Buttoneast.settext ("East");
Buttoneast.setlayoutdata (New Borderlayout.borderdata (Borderlayout.east));
Button Buttonnorth = New button (Shell, SWT. PUSH);
Buttonnorth.settext ("North");
Buttonnorth.setlayoutdata (New Borderlayout.borderdata (Borderlayout.north));

Button Buttonsouth = New button (Shell, SWT. PUSH);
Buttonsouth.settext ("South");
Buttonsouth.setlayoutdata (New Borderlayout.borderdata (Borderlayout.south));

Text text = new text (Shell, SWT. MULTI | Swt. BORDER | Swt. V_scroll | Swt. H_scroll);
Text.settext ("Center");
Text.setlayoutdata (New Borderlayout.borderdata (Borderlayout.center));

Shell.pack ();
Shell.open ();

while (!shell.isdisposed ()) {
if (!display.readanddispatch ()) {
Display.sleep ();
}
}
Display.dispose ();
}
public static void Main (string[] args) {
New Borderlayoutsample ();
}
}