Attachment 66364 Details for Bug 186038 – Sinppet to demo the missing of SWT.Activate event fired to the dropdown shell during a draggin operation on Linux

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Sinppet to demo the missing of SWT.Activate event fired to the dropdown shell during a draggin operation on Linux

DragAndDropApp.java (text/plain), 5.67 KB, created by Mei Thom

on 2007-05-08 17:07:34 EDT

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Description:

Filename:

MIME Type:

Creator: Mei Thom

Created: 2007-05-08 17:07:34 EDT

Size: 5.67 KB

patch

obsolete

>package com.ibm.dragdrop;
>
>
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.dnd.DND;
>import org.eclipse.swt.dnd.DragSource;
>import org.eclipse.swt.dnd.DragSourceEvent;
>import org.eclipse.swt.dnd.DragSourceListener;
>import org.eclipse.swt.dnd.DropTarget;
>import org.eclipse.swt.dnd.DropTargetEvent;
>import org.eclipse.swt.dnd.DropTargetListener;
>import org.eclipse.swt.dnd.TextTransfer;
>import org.eclipse.swt.dnd.Transfer;
>import org.eclipse.swt.events.DisposeEvent;
>import org.eclipse.swt.events.DisposeListener;
>import org.eclipse.swt.events.SelectionAdapter;
>import org.eclipse.swt.events.SelectionEvent;
>import org.eclipse.swt.graphics.Point;
>import org.eclipse.swt.graphics.Rectangle;
>import org.eclipse.swt.layout.GridLayout;
>import org.eclipse.swt.layout.RowLayout;
>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 DragAndDropApp {
>	
>	public static void main(String[] args) {
>		
>		Display display = new Display();
>		final Shell shell = new Shell(display);		
>		GridLayout layout = new GridLayout();
>		layout.numColumns = 2;
>		shell.setLayout(layout);
>		
>		// create the drop down shell		
>		final Shell dropDownShell = new Shell(shell, SWT.ON_TOP | SWT.DROP_DOWN);
>		dropDownShell.setLayout(new RowLayout());
>		dropDownShell.setVisible(false);
>		
>		dropDownShell.addListener(SWT.Activate, new Listener() {
>			public void handleEvent(Event event) {
>				System.out.println("dropDownShell gets Activate event!");
>			}
>		});
>		
>		dropDownShell.addListener(SWT.Deactivate, new Listener() {
>			public void handleEvent(Event event) {
>				System.out.println("dropDownShell entering Deactivate event handler and will hide the dropdown shell");
>				hideDropDown(dropDownShell);
>			}
>		});
>		
>		dropDownShell.addListener(SWT.Close, new Listener() {
>			public void handleEvent(Event event) {
>				hideDropDown(dropDownShell);
>			}
>		});
>		
>		
>		// create the button1 and when it is hovered, display the dropdown
>		final Button button1 = new Button(shell, SWT.PUSH);
>		button1.setText("Drop target");
>		button1.addSelectionListener(new SelectionAdapter() {
>			public void widgetSelected(SelectionEvent e) {
>				if (!dropDownShell.isVisible()) {
>					showDropDown(button1, dropDownShell);
>				}
>			}			
>		});
>		
>		int operations = DND.DROP_COPY | DND.DROP_DEFAULT; 
>		DropTarget target = new DropTarget(button1, operations); 
>		// Provide data in Text format 
>		Transfer[] types = new Transfer[] {TextTransfer.getInstance()}; 
>		target.setTransfer(types);
>		
>		target.addDropListener(new DropTargetListener() {
>			public void dragEnter(DropTargetEvent event) {
>				if (event.detail == DND.DROP_DEFAULT) {
>					if ((event.operations & DND.DROP_COPY) != 0) {
>						event.detail = DND.DROP_COPY;
>					} else {
>						event.detail = DND.DROP_NONE;
>					}
>				}
>				for (int i = 0; i < event.dataTypes.length; i++) {
>					if (TextTransfer.getInstance().isSupportedType(event.dataTypes[i])){
>						event.currentDataType = event.dataTypes[i];
>						if (event.detail != DND.DROP_COPY) {
>							event.detail = DND.DROP_NONE;
>						}
>						break;
>					}
>				}
>			}
>		
>			public void dragOver(DropTargetEvent event) {
>				event.feedback = DND.FEEDBACK_SELECT;
>				
>				if (!dropDownShell.isVisible()) {
>					showDropDown(button1, dropDownShell);
>				}
>			}
>			
>			public void dragOperationChanged(DropTargetEvent event) {
>				
>			}
>			
>			public void dragLeave(DropTargetEvent event) { } 
>			
>			public void dropAccept(DropTargetEvent event) { }
>			
>			public void drop(DropTargetEvent event) {
>				if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
>					String text = (String)event.data;
>					System.out.println(text);
>				}
>			}
>		});
>		
>		
>		// create the button2 as the drag source
>		final Button button2 = new Button(shell, SWT.PUSH);
>		button2.setText("Drag source");
>		
>		operations = DND.DROP_COPY; 
>		DragSource source = new DragSource(button2, operations); 
>		  
>		// Provide data in Text format 
>		source.setTransfer(types); 
>		   
>		source.addDragListener(new DragSourceListener() { 
>		    public void dragStart(DragSourceEvent event) { 
>		       if (button2.getText().length() == 0) { 
>		           event.doit = false; 
>		       }
>		    } 
>		    public void dragSetData(DragSourceEvent event) { 
>		    	// Provide the data of the requested type. 
>		    	if (TextTransfer.getInstance().isSupportedType(event.dataType)) { 
>		    		event.data = button2.getText(); 
>		    	} 
>		    } 
>		    public void dragFinished(DragSourceEvent event) { 
>		    	
>		    } 
>		}); 
>
>		
>		shell.setSize(300, 300);
>		shell.addDisposeListener(new DisposeListener () {
>			public void widgetDisposed(DisposeEvent e) {
>				if (dropDownShell != null && !dropDownShell.isDisposed()) {
>					dropDownShell.dispose();
>				}
>			}
>		});
>		shell.open();
>		while (!shell.isDisposed()) {
>			if (!display.readAndDispatch())
>				display.sleep();
>		}
>		display.dispose();
>	}
>	
>	private static void showDropDown(final Button button1, final Shell dropDownShell) {
>		if (dropDownShell != null && !dropDownShell.isDisposed()) {
>			dropDownShell.setText("This is a drop down shell");
>			dropDownShell.setSize(100, 200);
>			Rectangle buttonRect = button1.getBounds();
>			Point p = button1.getParent().toDisplay(new Point(buttonRect.x, buttonRect.y + buttonRect.height));
>			dropDownShell.setLocation(p.x, p.y);
>			dropDownShell.setVisible(true);
>			dropDownShell.setFocus();
>		}		
>	}
>	
>	private static void hideDropDown(final Shell dropDownShell) {
>		dropDownShell.setVisible(false);
>	}	
>}
>

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Attachments on bug 186038: 66364