7、可伸缩窗口
该自定义窗口可以通过鼠标随意更改窗口大小
package com.hikvision.encapsulate.view.control.shell; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ShellEvent; import org.eclipse.swt.events.ShellListener; import org.eclipse.swt.graphics.Cursor; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import com.hikvision.encapsulate.view.swt.SWTResourceManager; /** * <p>自定义shell，该shell仅适用于无标题，即 style == SWT.NO_TRIM使用,提供放大缩小功能</p> * @author wangfang5 2018年6月11日 下午2:32:07 * @version V1.0 */ public class DefinedShell extends Shell { private Point lastPos; private boolean drag = false; /** * <p>锚点对象</p> * @author wangfang5 2018年6月11日 下午1:39:43 * @version V1.0 */ private class Anchor { /** * 锚点的光标对象 */ final Cursor cusor; /** * 锚点位置计算的掩码 */ final Rectangle mask; Anchor(Cursor cusor, Rectangle mask) { this.cusor = cusor; this.mask=mask; } } private int anchorIndex; // 光标定义 private final Cursor CURSOR_SIZENESW=new Cursor(Display.getDefault(),SWT.CURSOR_SIZENESW); private final Cursor CURSOR_SIZENS=new Cursor(Display.getDefault(),SWT.CURSOR_SIZENS); private final Cursor CURSOR_SIZENWSE=new Cursor(Display.getDefault(),SWT.CURSOR_SIZENWSE); private final Cursor CURSOR_SIZEWE=new Cursor(Display.getDefault(),SWT.CURSOR_SIZEWE); private final Cursor CURSOR_SIZEALL=new Cursor(Display.getDefault(),SWT.CURSOR_SIZEALL); //lt+-------+-------+rt // | t | // | | // | c | //l + + +r // | | // | | // | b | //lb+-------+-------+rb enum AnchorType{ LT,T,RT,L,C,R,LB,B,RB } /** * 9个锚点位置({@link Anchor})对象数组(按从左到右从上到下顺序排序) */ private final Anchor[] anchors=new Anchor[]{ new Anchor(CURSOR_SIZENWSE,new Rectangle(1,1,-1,-1)), new Anchor(CURSOR_SIZENS,new Rectangle(0,1,0,-1)), new Anchor(CURSOR_SIZENESW,new Rectangle(0,1,1,-1)), new Anchor(CURSOR_SIZEWE,new Rectangle(1,0,-1,0)), new Anchor(CURSOR_SIZEALL,new Rectangle(1,1,0,0)), new Anchor(CURSOR_SIZEWE,new Rectangle(0,0,1,0)), new Anchor(CURSOR_SIZENESW,new Rectangle(1,0,-1,1)), new Anchor(CURSOR_SIZENS,new Rectangle(0,0,0,1)), new Anchor(CURSOR_SIZENWSE,new Rectangle(0,0,1,1))};; public DefinedShell(int style){ super(style); final Cursor defCursor=getCursor(); this.setBackground(SWTResourceManager.getWhiteColor()); if((style & SWT.NO_TRIM) != 0){ getDisplay().addFilter(SWT.MouseDown,event->{ try{ moveAbove(null); Control control = (Control)event.widget; if(control.getData("close") == null){ if(event.button == 1 && anchorIndex>=0){ drag = true; lastPos = ((Control)(event.widget)).toDisplay(event.x, event.y); } } }catch(Throwable e){ } }); getDisplay().addFilter(SWT.MouseUp, event->{ drag = false; }); addShellListener(new ShellListener() { @Override public void shellIconified(ShellEvent e) { // TODO Auto-generated method stub } @Override public void shellDeiconified(ShellEvent e) { // TODO Auto-generated method stub } @Override public void shellDeactivated(ShellEvent e) { drag = false; } @Override public void shellClosed(ShellEvent e) { // TODO Auto-generated method stub } @Override public void shellActivated(ShellEvent e) { // TODO Auto-generated method stub } }); getDisplay().addFilter(SWT.MouseMove, event->{ try{ if(drag){ //允许拖拽 Point pos=((Control)(event.widget)).toDisplay(event.x, event.y); modify(pos.x-lastPos.x,pos.y-lastPos.y,anchors[anchorIndex].mask); lastPos = pos; }else{ //查找相对于shell的坐标 Point point = getRelativeShellPoint((Control)event.widget,event.x ,event.y); anchorIndex = getAnchorIndex(point.x ,point.y); if(anchorIndex == -1){ //未选中可以拖拽的边 setCursor(defCursor); }else{ setCursor(anchors[anchorIndex].cusor); } } }catch(Throwable e){ } }); } } /** * 获取相对于shell的坐标 * @author wangfang5 2018年6月11日 下午5:14:34 * @param control * @return */ private Point getRelativeShellPoint(Control control,int eventX,int eventY){ int x = eventX; int y = eventY; Control now = control; while(!(now instanceof Shell)){ x += now.getBounds().x; y += now.getBounds().y; now = now.getParent(); } return new Point(x,y); } @Override protected void checkSubclass(){ } /** * 改变窗口位置和尺寸 * @param x x轴移动距离 * @param y y轴移动距离 * @param mask 锚点位置计算的掩码 */ private void modify(int x,int y,Rectangle mask){ // 计算出新的窗口位置和尺寸 Rectangle bound = getBounds(); bound.x+=x*mask.x; bound.y+=y*mask.y; bound.width+=x*mask.width; bound.height+=y*mask.height; // 设置新的窗口位置 setBounds(bound); redraw(); } /** * 获取锚点 * @author wangfang5 2018年6月11日 下午2:00:57 * @param mousex * @param mousey * @return */ private int getAnchorIndex(int mousex,int mousey){ try{ Rectangle bound = getBounds(); if(Math.abs(mousex - bound.width) < 10 && mousey < 10){ //右上角、 return AnchorType.RT.ordinal(); }else if(Math.abs(mousey - bound.height) <= 10 && mousex < 10){ //左下角 return AnchorType.LB.ordinal(); }if(0 <= mousey && mousey < 10 && 0 <= mousex && mousex < 10){ //左上角 return AnchorType.LT.ordinal(); }else if(Math.abs(mousey - bound.height) <= 10 && Math.abs(mousex - bound.width) < 10){ //右下角 return AnchorType.RB.ordinal(); }else if (0 <= mousey && mousey < 5) { //上、 return AnchorType.T.ordinal(); } else if(Math.abs(mousey - bound.height) <= 5){ //下 return AnchorType.B.ordinal(); }else if (0 <= mousex && mousex< 5) { //左 return AnchorType.L.ordinal(); }else if(Math.abs(mousex - bound.width) <= 5){ //右 return AnchorType.R.ordinal(); }else return -1; }catch(Throwable e){ return -1; } } @Override public void open() { // TODO Auto-generated method stub super.open(); drag = false; } }
使用范例：
public MainUI() { Display display = Display.getDefault(); shell = new DefinedShell(SWT.NO_TRIM | SWT.NONE); shell.setMinimumSize(shellMinWidth, shellMinHeight); shell.setBackground(SWTResourceManager.getColor(51, 51, 51)); int shellWidth = 1280; int shellHeight = 800; shell.setMaximized(true); shell.setMinimized(true); int x = Display.getCurrent().getClientArea().width/2 - shellWidth / 2; int y = Display.getCurrent().getClientArea().height / 2 - shellHeight / 2; if(x <= 0){ x = 0; shellWidth = Display.getCurrent().getClientArea().width/2; if(shellWidth < (shellMinWidth + 100)){ shellWidth = shellMinWidth + 100; } } if(y<=0){ y = 0; shellHeight = Display.getCurrent().getClientArea().height/2; if(shellHeight < (shellMinHeight+100)){ shellHeight = shellMinHeight+100; } if((shellHeight + 400)<shellWidth){ shellWidth = shellHeight + 400; } } shell.setLocation( Display.getCurrent().getClientArea().width/ 2 - shellWidth / 2, Display.getCurrent().getClientArea().height / 2 - shellHeight / 2); shell.setSize(shellWidth, shellHeight); }
//若是需要最大化按钮和最小化按钮（自己提供的图标），需要给他们绑上事件，代码如下：
Label min_label = new Label(tool_bar_composite, SWT.NONE);
min_label.setBackground(SWTResourceManager.getColor(51, 51, 51));
min_label.setForeground(SWTResourceManager.getColor(SWT.COLOR_WHITE));
GridData gd_min_label = new GridData(SWT.RIGHT,SWT.CENTER,true,false,1,1);
gd_min_label.heightHint = 24;
gd_min_label.widthHint = 24;
min_label.setLayoutData(gd_min_label);
min_label.setImage(ImageUtil.getImage(FileUtil.loadResourceFileAsStream(Constants.MININIZE)));
min_label.setCursor(SWTResourceManager.getCursor(SWT.CURSOR_HAND));
min_label.setToolTipText("最小化");
min_label.addListener(SWT.MouseDown, event ->{
shell.setMinimized(true);
});
Label max_label = new Label(tool_bar_composite, SWT.NONE);
max_label.setBackground(SWTResourceManager.getColor(51, 51, 51));
max_label.setForeground(SWTResourceManager.getColor(SWT.COLOR_WHITE));
GridData gd_max_label = new GridData(SWT.RIGHT,SWT.CENTER,true,false,1,1);
gd_max_label.heightHint = 24;
gd_max_label.widthHint = 24;
max_label.setLayoutData(gd_max_label);
max_label.setImage(ImageUtil.getImage(FileUtil.loadResourceFileAsStream(Constants.MAXIMIZE)));
max_label.setCursor(SWTResourceManager.getCursor(SWT.CURSOR_HAND));
max_label.setToolTipText("最大化");
max_label.addListener(SWT.MouseDown, event ->{
if(shell.getFullScreen()){
shell.setFullScreen(false);
max_label.setImage(ImageUtil.getImage(FileUtil.loadResourceFileAsStream(Constants.MAXIMIZE)));
max_label.setToolTipText("最大化");
}else{
shell.setFullScreen(true);
max_label.setImage(ImageUtil.getImage(FileUtil.loadResourceFileAsStream(Constants.RESTORE)));
max_label.setToolTipText("恢复");
}
});
以上DefinedShell提供了通过鼠标改变窗口大小功能，范例中提供了放大窗口和缩小窗口功能。