/*
XOWA: the XOWA Offline Wiki Application
Copyright (C) 2012 gnosygnu@gmail.com

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
package gplx.gfui;
import gplx.Byte_ascii;
import gplx.String_;

import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.MouseListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Swt_app_main {
	public static void main(String[] args) {
//		Drag_drop();
//		List_fonts();
		keystrokes(args);
//		Permission_denied();
//		Combo_default();
//		Combo_composite();
	}
	static void Drag_drop() {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setLayout(new GridLayout());
		final CTabFolder folder = new CTabFolder(shell, SWT.BORDER);
		folder.setLayoutData(new GridData(GridData.FILL_BOTH));
		for (int i = 0; i < 10; i++) {
			CTabItem item = new CTabItem(folder, SWT.NONE);
			item.setText("item "+i);
			Text text = new Text(folder, SWT.BORDER | SWT.MULTI | SWT.VERTICAL);
			text.setText("Text control for "+i);
			item.setControl(text);
			if (i == 9) {
				item.setShowClose(false);
				item.setText("+");
//				item.setImage(new Image(Display.getDefault(), "J:\\gplx\\xowa\\user\\anonymous\\app\\img\\edit\\format-bold-A.png"));
			}
		}
		ToolBar t = new ToolBar( folder, SWT.FLAT );
		ToolItem i = new ToolItem( t, SWT.PUSH );
		i.setText( "add" );
		folder.setTopRight( t, SWT.RIGHT );
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
    static void keystrokes(String[] args) 
    {

        Display display = new Display ();

        final Shell shell = new Shell (display);

//        display.addFilter(SWT.KeyDown, new Listener() {
//
//            public void handleEvent(Event e) {
//                if(((e.stateMask & SWT.CTRL) == SWT.CTRL) && (e.keyCode == 'f'))
//                {
//                    System.out.println("From Display I am the Key down !!" + e.keyCode);
//                }
//            }
//        });
        shell.addKeyListener(new KeyListener() {
            public void keyReleased(KeyEvent e) {
//                if(((e.stateMask & SWT.CTRL) == SWT.CTRL) && (e.keyCode == 'f'))
//                {
//                    shell.setBackground(orig);
//                    System.out.println("Key up !!");
//                }
            	System.out.println(e.stateMask + " " + e.keyCode);
            }
            public void keyPressed(KeyEvent e) {
//            	System.out.println(e.stateMask + " " + e.keyCode);
            }
        });
        shell.addMouseListener(new MouseListener() {			
			@Override
			public void mouseUp(MouseEvent arg0) {
				// TODO Auto-generated method stub
				System.out.println(arg0.button);
			}
			
			@Override
			public void mouseDown(MouseEvent arg0) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void mouseDoubleClick(MouseEvent arg0) {
				// TODO Auto-generated method stub
				
			}
		});

        shell.setSize (200, 200);
        shell.open ();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch ()) display.sleep ();
        }
        display.dispose ();

    }
	static void List_fonts() {
		java.awt.GraphicsEnvironment e = java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment();
		java.awt.Font[] fonts = e.getAllFonts(); // Get the fonts
		for (java.awt.Font f : fonts) {
		  System.out.println(f.getFontName());
		}		
	}
	static void Permission_denied() {
		String html
			= "<html>\n"
			+ "<head>\n" 
			+ "<script>\n"
			+ "  function permissionDeniedExample() {\n"
			+ "    var sel = window.getSelection();\n" 
			+ "    alert('calling sel.rangeCount');\n"
			+ "    alert('sel.rangeCount = ' + sel.rangeCount);\n"
			+ "  }\n"
			+ "</script>\n"
			+ "</head>\n"
			+ "<body>\n" 
			+ "  <a href='#direct_call_fails'/>click to call permissionDeniedExample -> will throw error and not show sel.rangeCount</a><br/>\n"
			+ "  <a href='#wrapped_call_works'/>click to call permissionDeniedExample inside a setTimeout -> will show sel.rangeCount</a><br/>\n"
			+ "</body>\n"
			+ "</html>\n"
			;

		System.setProperty
		( "org.eclipse.swt.browser.XULRunnerPath"
		// ADJUST THIS PATH AS NECESSARY ON YOUR MACHINE
		, "C:\\xowa\\bin\\windows\\xulrunner"
		);
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		final Browser browser;
		try {
			browser = new Browser(shell, SWT.MOZILLA);	// changed from none
			browser.addLocationListener(new LocationListener() {				
				@Override
				public void changing(LocationEvent arg0) {
					if (arg0.location.equals("about:blank")) return;
					arg0.doit = false;
				}
				
				@Override
				public void changed(LocationEvent arg0) {
					String location = arg0.location;
					if (location.equals("about:blank")) return;
					
					// build code
					String code = "alert('unknown_link:" + location + "')";
					if 		(location.contains("direct_call_fails"))
						code = "permissionDeniedExample();";
					else if (location.contains("wrapped_call_works"))
						code = "setTimeout(function(){permissionDeniedExample();}, 1);";
					
					// evaluate code
					try {
						browser.evaluate(code);
					} catch (Exception e) {
						System.out.println(e);
					}
					arg0.doit = false;
				}
			});
		} catch (SWTError e) {
			System.out.println("Could not instantiate Browser: " + e.getMessage());
			display.dispose();
			return;
		}
		browser.setText(html);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
	public static void Combo_dflt() {
	    Display display = new Display();
	    Shell shell = new Shell(display);
	    shell.setLayout(new FillLayout());
	
	    String[] ITEMS = { "A", "B", "C", "D" };
	
	    final Combo combo = new Combo(shell, SWT.DROP_DOWN);
	    combo.setItems(ITEMS);
	    combo.select(2);
	    
	    combo.addSelectionListener(new SelectionListener() {
	      public void widgetSelected(SelectionEvent e) {
	        System.out.println(combo.getText());
	      }
	
	      public void widgetDefaultSelected(SelectionEvent e) {
	        System.out.println(combo.getText());
	      }
	    });
	    combo.addKeyListener(new KeyListener() {				
			@Override
			public void keyReleased(KeyEvent arg0) {
				// TODO Auto-generated method stub					
			}
			
			@Override
			public void keyPressed(KeyEvent arg0) {
				System.out.println(combo.getText());					
				if (arg0.keyCode == Byte_ascii.Ltr_a) {
					combo.setItem(0, "a");
					combo.setListVisible(true);
				}
				else if (arg0.keyCode == Byte_ascii.Ltr_b) {
					combo.setItem(0, "b");
					combo.setListVisible(true);
				}
				// System.out.println(combo.getText());
			}
		});
	
	    shell.open();
	    combo.setListVisible(true);
	    while (!shell.isDisposed()) {
	      if (!display.readAndDispatch()) {
	        display.sleep();
	      }
	    }
	    display.dispose();
	}
	public static void Combo_composite() {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		GridLayout gridLayout = new GridLayout();
	    gridLayout.numColumns = 2;
	    gridLayout.makeColumnsEqualWidth = true;		
		shell.setLayout(gridLayout);
		final Text text = new Text(shell, SWT.BORDER);
		text.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING));
		Text text2 = new Text(shell, SWT.BORDER);
		text2.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_END));
		shell.pack();
		shell.open();
		
		final Shell combo_shell = new Shell(display, SWT.ON_TOP);
		combo_shell.setLayout(new FillLayout());
		final Table combo_table = new Table(combo_shell, SWT.SINGLE);
		for (int i = 0; i < 5; i++) {
			new TableItem(combo_table, SWT.NONE);
		}

		text.addListener(SWT.KeyDown, new Listener() {			
			@Override public void handleEvent(Event event) {
				int index = -1;
				switch (event.keyCode) {
					case SWT.ARROW_DOWN:
						if (event.stateMask == SWT.ALT) {
							Rectangle text_bounds = display.map(shell, null, text.getBounds());
							combo_shell.setBounds(text_bounds.x, text_bounds.y + text_bounds.height, text_bounds.width, (text_bounds.height - 1) * combo_table.getItems().length);
							combo_shell.setVisible(true);
						} else {
							index = (combo_table.getSelectionIndex() + 1) % combo_table.getItemCount();
							combo_table.setSelection(index);
							event.doit = false;
						}
						break;
					case SWT.ARROW_UP:
						if (event.stateMask == SWT.ALT) {
							combo_shell.setVisible(false);
						} else {
							index = combo_table.getSelectionIndex() - 1;
							if (index < 0) index = combo_table.getItemCount() - 1;
							combo_table.setSelection(index);
							event.doit = false;
						}
						break;
					case SWT.CR:
						if (combo_shell.isVisible() && combo_table.getSelectionIndex() != -1) {
							text.setText(combo_table.getSelection()[0].getText());
							combo_shell.setVisible(false);
						}
						break;
					case SWT.ESC:
						combo_shell.setVisible(false);
						break;
				}			
			}
		});

		text.addListener(SWT.Modify, new Listener() {
			@Override public void handleEvent(Event event)  {
				String string = text.getText();
				if (string.length() == 0) {
					combo_shell.setVisible(false);
				} else {
					TableItem[] items = combo_table.getItems();
					for (int i = 0; i < items.length; i++) {
						items[i].setText(string + '-' + i);
					}
					
					Rectangle text_bounds = display.map(shell, null, text.getBounds());
					combo_shell.setBounds(text_bounds.x, text_bounds.y + text_bounds.height, text_bounds.width, (text_bounds.height - 1) * items.length);
					combo_shell.setVisible(true);
				}
			}
		});

		combo_table.addListener(SWT.DefaultSelection, new Listener() {
			@Override public void handleEvent(Event arg0) {
				text.setText(combo_table.getSelection()[0].getText());
				combo_shell.setVisible(false);			
			}
		});

		combo_table.addListener(SWT.KeyDown, new Listener() {
			@Override public void handleEvent(Event event) {
				if (event.keyCode == SWT.ESC) {
					combo_shell.setVisible(false);
				}
			}
		});

		final Swt_shell_hider shell_hider = new Swt_shell_hider(combo_shell);
		Listener focus_out_listener = new Listener() {
			@Override public void handleEvent(Event arg0) {
				if (display.isDisposed()) return;
				Control control = display.getFocusControl();
//				if (control == null || (control != text && control != combo_table)) {
//					combo_shell.setVisible(false);
//				}
				if (control == null || (control == text || control == combo_table)) {
					// combo_shell.setVisible(false);
					shell_hider.Active = true;
					display.asyncExec(shell_hider);
					//Thread t = new Thread(shell_hider); t.start();
					//Swt_shell_hider
				}
				
//				boolean combo_is_focus = combo_table.isFocusControl();
//				boolean text_is_focus = text.isFocusControl();
//				if (control == null || (control == text)) {
//					combo_shell.setVisible(false);
//				}
//				if (control == null || (control == combo_table)) {
//					combo_shell.setVisible(true);
//				}
			}
		};
		
		combo_table.addListener(SWT.FocusOut, focus_out_listener);
		text.addListener(SWT.FocusOut, focus_out_listener);

		Listener focus_in_listener = new Listener() {
			@Override public void handleEvent(Event arg0) {
				if (display.isDisposed()) return;
				Control control = display.getFocusControl();
				if (control == combo_table) {
					// combo_shell.setVisible(false);
					//display.asyncExec(shell_hider);
					shell_hider.Active = false;
					//Swt_shell_hider
				}
//				boolean combo_is_focus = combo_table.isFocusControl();
//				boolean text_is_focus = text.isFocusControl();
//				if (control == null || (control == text)) {
//					combo_shell.setVisible(false);
//				}
//				if (control == null || (control == combo_table)) {
//					combo_shell.setVisible(true);
//				}
			}
		};
		combo_table.addListener(SWT.FocusIn, focus_in_listener);
	
		shell.addListener(SWT.Move, new Listener() {
			@Override public void handleEvent(Event arg0) {
				combo_shell.setVisible(false);
			}
		}); 
	
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) display.sleep();
		}
		display.dispose();
	}
}
class Swt_shell_hider implements Runnable {
	public boolean Active = true;

	private Shell combo_shell;
	public Swt_shell_hider(Shell combo_shell) {this.combo_shell = combo_shell;}
	@Override public void run() {
//		try {
//			Thread.sleep(1000);
//		} catch (InterruptedException e) {
//			// TODO Auto-generated catch block
//			e.printStackTrace();
//		}
		if (Active) {
			combo_shell.setVisible(false);
		}
	}
}