Java SWT-具有自定义形状的可调整大小的外壳

Java SWT-具有自定义形状的可调整大小的外壳,java,eclipse,resize,swt,Java,Eclipse,Resize,Swt,我有一个应用程序,你可以在其中调用带有控件的小窗口。我希望这些小窗户是长方形的,有圆角,没有任何装饰。我发现了这个老问题并使用了它: 我的结局是: package swt_window_test; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.gra

我有一个应用程序,你可以在其中调用带有控件的小窗口。我希望这些小窗户是长方形的,有圆角,没有任何装饰。我发现了这个老问题并使用了它:

我的结局是:

package swt_window_test;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.Region;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;


public class SingleDisplayMultipleShells
{

    // circle
    static int[] circle(int r, int offsetX, int offsetY) {
        int[] polygon = new int[8 * r + 4];
        // x^2 + y^2 = r^2
        for (int i = 0; i < 2 * r + 1; i++) {
          int x = i - r;
          int y = (int) Math.sqrt(r * r - x * x);
          polygon[2 * i] = offsetX + x;
          polygon[2 * i + 1] = offsetY + y;
          polygon[8 * r - 2 * i - 2] = offsetX + x;
          polygon[8 * r - 2 * i - 1] = offsetY - y;
        }
        return polygon;
      }


  // ========================================
  // Inner class to represent a child Shell
  // ========================================
  private class ChildShell
  {
     public ChildShell(Shell mainWindowShell)
     {
        System.out.println("Creating new child Shell");
        Display display = mainWindowShell.getDisplay();

        // =========================================
        // Create a Shell (window) from the Display
        // =========================================
        final Shell shell = new Shell(mainWindowShell, SWT.NO_TRIM | SWT.ON_TOP);

        shell.setBackground(display.getSystemColor(SWT.COLOR_RED));

        // define a region that looks like a key hole
        Region region = new Region();

        region.add(circle(10, 10, 10));
        region.add(circle(10, 10, 500));
        region.add(circle(10, 500, 10));
        region.add(circle(10, 500, 500));
        region.add(new int[] { 10, 0, 10, 510, 500, 510, 500, 0 });
        region.add(new int[] { 0, 10, 0, 500, 510, 500, 510, 10 });

        // define the shape of the shell using setRegion
        shell.setRegion(region);
        Rectangle size = region.getBounds();
        shell.setSize(size.width, size.height);
        // add ability to move shell around
        Listener l = new Listener() {
          Point origin;

          public void handleEvent(Event e) {
            switch (e.type) {
            case SWT.MouseDown:
              origin = new Point(e.x, e.y);
              break;
            case SWT.MouseUp:
              origin = null;
              break;
            case SWT.MouseMove:
              if (origin != null) {
                Point p = display.map(shell, null, e.x, e.y);
                shell.setLocation(p.x - origin.x, p.y - origin.y);
              }
              break;
            }
          }
        };
        shell.addListener(SWT.MouseDown, l);
        shell.addListener(SWT.MouseUp, l);
        shell.addListener(SWT.MouseMove, l);
        // add ability to close shell
        Button b = new Button(shell, SWT.PUSH);
        b.setBackground(shell.getBackground());
        b.setText("close");
        b.pack();
        b.setLocation(10, 68);
        b.addListener(SWT.Selection, new Listener() {
          public void handleEvent(Event e) {
            shell.close();
          }
        });
        shell.open();

        // =============================================================
        // Register a listener for the Close event on the child Shell.
        // This disposes the child Shell
        // =============================================================
        shell.addListener(SWT.Close, new Listener()
        {
           @Override
           public void handleEvent(Event event)
           {
              System.out.println("Child Shell handling Close event, about to dispose this Shell");
              shell.dispose();
           }
        });
     }
  }

  public SingleDisplayMultipleShells()
  {
     // ======================================================
     // Create the main Display object that represents the UI
     // subsystem and contains the single UI handling thread
     // ======================================================
     final Display display = Display.getDefault();

     // ====================================================
     // create a shell for the main window from the Display
     // ====================================================
     final Shell mainWindowShell = new Shell(display, SWT.CLOSE);

     // =====================
     // Set the Window Title
     // =====================
     mainWindowShell.setText("Main Shell");

     // =========================================
     // Create a button that spawns child Shells
     // =========================================
     Button spawn = new Button(mainWindowShell, SWT.PUSH);
     spawn.setText("Create Child");
     spawn.setBounds(10, 10, 150, 30);
     spawn.addSelectionListener(new SelectionListener()
     {
        @Override
        public void widgetSelected(SelectionEvent e)
        {
           // =====================================================
           // on button press, create a child Shell object passing
           // the main Display. The child could also access the
           // display itself by calling Display.getDefault()
           // =====================================================
           System.out.println("Main Shell handling Button press, about to create child Shell");
           new ChildShell(mainWindowShell);           
        }

        @Override
        public void widgetDefaultSelected(SelectionEvent e)
        {
           widgetSelected(e);
        }
     });

     // =============================================================
     // Register a listener for the Close event on the main Shell.
     // This disposes the Display which will cause the entire child
     // tree to dispose
     // =============================================================
     mainWindowShell.addListener(SWT.Close, new Listener()
     {
        @Override
        public void handleEvent(Event event)
        {
           System.out.println("Main Shell handling Close event, about to dipose the main Display");
           display.dispose();
        }
     });

     // ================================
     // Set size on main Shell and open
     // ================================
     mainWindowShell.setSize(200, 200);
     mainWindowShell.open();

     // =====================================
     // Main UI event dispatch loop
     // that handles all UI events from all
     // SWT components created as children of
     // the main Display object
     // =====================================
     while (!display.isDisposed())
     {
        // ===================================================
        // Wrap each event dispatch in an exception handler
        // so that if any event causes an exception it does
        // not break the main UI loop
        // ===================================================
        try
        {
           if (!display.readAndDispatch())
           {
              display.sleep();
           }
        }
        catch (Exception e)
        {
           e.printStackTrace();
        }
     }

     System.out.println("Main Display event handler loop has exited");
  }

  public static void main(String[] args)
  {
     new SingleDisplayMultipleShells();
  }
} 
包装swt\u窗口测试;
导入org.eclipse.swt.swt;
导入org.eclipse.swt.events.SelectionEvent;
导入org.eclipse.swt.events.SelectionListener;
导入org.eclipse.swt.graphics.Point;
导入org.eclipse.swt.graphics.Rectangle;
导入org.eclipse.swt.graphics.Region;
导入org.eclipse.swt.widgets.Button;
导入org.eclipse.swt.widgets.Display;
导入org.eclipse.swt.widgets.Event;
导入org.eclipse.swt.widgets.Listener;
导入org.eclipse.swt.widgets.Shell;
公共类SingleDisplayMultipleShell
{
//圈
静态int[]圆(int r,int offsetX,int offsetY){
int[]多边形=新的int[8*r+4];
//x^2+y^2=r^2
对于(int i=0;i<2*r+1;i++){
int x=i-r;
inty=(int)Math.sqrt(r*r-x*x);
多边形[2*i]=偏移量x+x;
多边形[2*i+1]=offsetY+y;
多边形[8*r-2*i-2]=偏移量x+x;
多边形[8*r-2*i-1]=偏移量-y;
}
返回多边形;
}
// ========================================
//表示子Shell的内部类
// ========================================
私有类儿童壳
{
公共子Shell(Shell主窗口Shell)
{
System.out.println(“创建新的子Shell”);
Display Display=mainWindowShell.getDisplay();
// =========================================
//从显示器创建外壳(窗口)
// =========================================
最终外壳=新外壳(主窗框,SWT.NO|U装饰| SWT.ON|U顶部);
shell.setBackground(display.getSystemColor(SWT.COLOR_RED));
//定义一个看起来像钥匙孔的区域
区域=新区域();
添加(圈(10,10,10));
添加(圈(10,10500));
添加(圈(10500,10));
添加(圆圈(1050500));
添加(新的int[]{10,0,10,510,500,510,500,0});
添加(新的int[]{0,10,0,500,510,500,510,10});
//使用setRegion定义外壳的形状
壳.setRegion(region);
矩形大小=region.getBounds();
外壳尺寸(尺寸、宽度、尺寸、高度);
//添加移动shell的能力
侦听器l=新侦听器(){
点源;
公共无效handleEvent(事件e){
开关(e型){
案例SWT.MouseDown:
原点=新点(e.x,e.y);
打破
案例SWT.MouseUp:
原点=空;
打破
case SWT.MouseMove:
如果(原点!=null){
点p=display.map(shell,null,e.x,e.y);
外壳设置位置(p.x-原点.x,p.y-原点.y);
}
打破
}
}
};
shell.addListener(SWT.MouseDown,l);
shell.addListener(SWT.MouseUp,l);
shell.addListener(SWT.MouseMove,l);
//添加关闭shell的功能
按钮b=新按钮(外壳,SWT.按钮);
b、 setBackground(shell.getBackground());
b、 setText(“关闭”);
b、 包装();
b、 设定位置(10,68);
b、 addListener(SWT.Selection,newlistener()){
公共无效handleEvent(事件e){
shell.close();
}
});
shell.open();
// =============================================================
//在子Shell上注册关闭事件的侦听器。
//这将处理孩子的外壳
// =============================================================
addListener(SWT.Close,new Listener())
{
@凌驾
公共无效handleEvent(事件)
{
System.out.println(“子Shell处理关闭事件,即将处理此Shell”);
shell.dispose();
}
});
}
}
公共单显示多网格()
{
// ======================================================
//创建表示UI的主显示对象
//子系统,并包含单个UI处理线程
// ======================================================
最终显示=Display.getDefault();
// ====================================================
//从显示屏为主窗口创建外壳
// ====================================================
最终外壳主窗口外壳=新外壳(显示,SWT.CLOSE);
// =====================
//设置窗口标题
// =====================
mainWindowsShell.setText(“主Shell”);
// =========================================
//创建生成子shell的按钮
// =========================================
Button spawn=新按钮(MainWindowsShell,SWT.PUSH);
spawn.setText(“创建子对象”);
产卵后缘(10,10,150,30);
spawn.addSelectionListener(新SelectionListener()
{
@凌驾
公共无效WidgeSelected(SelectionEvent e)
{
// =====================================================
//按下按钮时,创建一个子壳对象
//主显示器。孩子还可以访问
//通过调用display.getDefault()显示自身
// =====================================================
System.out.println(“按下主Shell处理按钮,即将创建子Shell”);
新的ChildShell(MainWindowsShell);
}
@凌驾
公共无效widgetDefaultSelected(SelectionEvent e)
{
已选定(e);
Button resize = new Button(shell, SWT.PUSH);
resize.setText("Resize");
resize.setBounds(140, 430, 20, 20);
resize.addListener(SWT.Selection, new Listener() {
    public void handleEvent(Event e) {
        if (!isMaximized) {
            Region region = new Region();
            region.add(circle(20, 20, 20));
            region.add(circle(20, 20, 580));
            region.add(circle(20, 280, 20));
            region.add(circle(20, 280, 580));
            region.add(new int[] { 20, 0, 280, 0, 280, 600, 20, 600 });
            region.add(new int[] { 0, 20, 300, 20, 300, 580, 0, 580 });
            shell.setRegion(region);
            Rectangle size = region.getBounds();
            shell.setSize(size.width, size.height);
            resize.setBounds(140, 580, 20, 20);
            isMaximized = true;
        }else {
            Region region = new Region();
            region.add(circle(20, 20, 20));
            region.add(circle(20, 20, 430));
            region.add(circle(20, 280, 20));
            region.add(circle(20, 280, 430));
            region.add(new int[] { 20, 0, 280, 0, 280, 450, 20, 450 });
            region.add(new int[] { 0, 20, 300, 20, 300, 430, 0, 430 });
            shell.setRegion(region);
            Rectangle size = region.getBounds();
            shell.setSize(size.width, size.height);
            resize.setBounds(140, 430, 20, 20);
            isMaximized = false;
        }
    }
});