slidertab.java

SWT开发例子

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.controlexample;


import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.events.*;

class SliderTab extends RangeTab {
	/* Example widgets and groups that contain them */
	Scale scale1;
	Slider slider1;
	Group sliderGroup, scaleGroup;

	/* Scale widgets added to the "Control" group */
	Scale incrementScale, pageIncrementScale, thumbScale;
	
	/**
	 * Creates the Tab within a given instance of ControlExample.
	 */
	SliderTab(ControlExample instance) {
		super(instance);
	}

	/**
	 * Creates the "Control" widget children.
	 */
	void createControlWidgets () {
		super.createControlWidgets ();
		createThumbGroup ();
		createIncrementGroup ();
		createPageIncrementGroup ();
	}
	
	/**
	 * Creates the "Example" group.
	 */
	void createExampleGroup () {
		super.createExampleGroup ();
		
		/* Create a group for the slider */
		sliderGroup = new Group (exampleGroup, SWT.NONE);
		sliderGroup.setLayout (new GridLayout ());
		sliderGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
		sliderGroup.setText ("Slider");
	
		/* Create a group for the scale */
		scaleGroup = new Group (exampleGroup, SWT.NONE);
		scaleGroup.setLayout (new GridLayout ());
		scaleGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
		scaleGroup.setText ("Scale");
	
	}
	
	/**
	 * Creates the "Example" widgets.
	 */
	void createExampleWidgets () {
		
		/* Compute the widget style */
		int style = getDefaultStyle();
		if (horizontalButton.getSelection ()) style |= SWT.HORIZONTAL;
		if (verticalButton.getSelection ()) style |= SWT.VERTICAL;
		if (borderButton.getSelection ()) style |= SWT.BORDER;
	
		/* Create the example widgets */
		scale1 = new Scale (scaleGroup, style);
		scale1.setMaximum (100);
		scale1.setSelection (50);
		scale1.setIncrement (5);
		scale1.setPageIncrement (10);
		slider1 = new Slider(sliderGroup, style);
		slider1.setMaximum (100);
		slider1.setSelection (50);
		slider1.setIncrement(5);
		slider1.setPageIncrement (10);
		slider1.setThumb (10);
	}
	
	/**
	 * Create a group of widgets to control the increment
	 * attribute of the example widget.
	 */
	void createIncrementGroup() {
	
		/* Create the group */
		Group incrementGroup = new Group (controlGroup, SWT.NONE);
		incrementGroup.setLayout (new GridLayout ());
		incrementGroup.setText (ControlExample.getResourceString("Increment"));
		incrementGroup.setLayoutData (new GridData (GridData.FILL_HORIZONTAL));
	
		/* Create the scale widget */
		incrementScale = new Scale (incrementGroup, SWT.NONE);
		incrementScale.setMaximum (100);
		incrementScale.setSelection (5);
		incrementScale.setPageIncrement (10);
		incrementScale.setIncrement (5);

		GridData data = new GridData (GridData.FILL_HORIZONTAL);
		data.widthHint = 100;
		incrementScale.setLayoutData (data);
	
		/* Add the listeners */
		incrementScale.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent e) {		
				setWidgetIncrement ();
			};
		});
	}
	
	/**
	 * Create a group of widgets to control the page increment
	 * attribute of the example widget.
	 */
	void createPageIncrementGroup() {
	
		/* Create the group */
		Group pageIncrementGroup = new Group (controlGroup, SWT.NONE);
		pageIncrementGroup.setLayout (new GridLayout ());
		pageIncrementGroup.setText (ControlExample.getResourceString("Page_Increment"));
		pageIncrementGroup.setLayoutData (new GridData (GridData.FILL_HORIZONTAL));
			
		/* Create the scale widget */
		pageIncrementScale = new Scale (pageIncrementGroup, SWT.NONE);
		pageIncrementScale.setMaximum (100);
		pageIncrementScale.setSelection (10);
		pageIncrementScale.setPageIncrement (10);
		pageIncrementScale.setIncrement (5);
	
		GridData data = new GridData (GridData.FILL_HORIZONTAL);
		data.widthHint = 100;
		pageIncrementScale.setLayoutData (data);

		/* Add the listeners */
		pageIncrementScale.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				setWidgetPageIncrement ();
			}
		});
	}
	
	/**
	 * Create a group of widgets to control the thumb
	 * attribute of the example widget.
	 */
	void createThumbGroup() {
	
		/* Create the group */
		Group thumbGroup = new Group (controlGroup, SWT.NONE);
		thumbGroup.setLayout (new GridLayout ());
		thumbGroup.setText (ControlExample.getResourceString("Thumb"));
		thumbGroup.setLayoutData (new GridData (GridData.FILL_HORIZONTAL));
		
		/* Create the scale widget */
		thumbScale = new Scale (thumbGroup, SWT.NONE);
		thumbScale.setMaximum (100);
		thumbScale.setSelection (10);
		thumbScale.setPageIncrement (10);
		thumbScale.setIncrement (5);
	
		GridData data = new GridData (GridData.FILL_HORIZONTAL);
		data.widthHint = 100;
		thumbScale.setLayoutData (data);

		/* Add the listeners */
		thumbScale.addSelectionListener (new SelectionAdapter () {
			public void widgetSelected (SelectionEvent event) {
				setWidgetThumb ();
			};
		});
	}
	
	/**
	 * Gets the "Example" widget children.
	 */
	Control [] getExampleWidgets () {
		return new Control [] {scale1, slider1};
	}
	
	/**
	 * Gets the text for the tab folder item.
	 */
	String getTabText () {
		return "Slider/Scale";
	}
	
	/**
	 * Sets the state of the "Example" widgets.
	 */
	void setExampleWidgetState () {
		super.setExampleWidgetState ();
		setWidgetIncrement ();
		setWidgetPageIncrement ();
		setWidgetThumb ();
	}
	
	/**
	 * Sets the increment of the "Example" widgets.
	 */
	void setWidgetIncrement () {
		slider1.setIncrement (incrementScale.getSelection ());
		scale1.setIncrement (incrementScale.getSelection ());
	}
	
	/**
	 * Sets the minimim of the "Example" widgets.
	 */
	void setWidgetMaximum () {
		slider1.setMaximum (maximumScale.getSelection ());
		scale1.setMaximum (maximumScale.getSelection ());
	}
	
	/**
	 * Sets the minimim of the "Example" widgets.
	 */
	void setWidgetMinimum () {
		slider1.setMinimum (minimumScale.getSelection ());
		scale1.setMinimum (minimumScale.getSelection ());
	}
	
	/**
	 * Sets the page increment of the "Example" widgets.
	 */
	void setWidgetPageIncrement () {
		slider1.setPageIncrement (pageIncrementScale.getSelection ());
		scale1.setPageIncrement (pageIncrementScale.getSelection ());
	}
	
	/**
	 * Sets the selection of the "Example" widgets.
	 */
	void setWidgetSelection () {
		slider1.setSelection (selectionScale.getSelection ());
		scale1.setSelection (selectionScale.getSelection ());
	}
	
	/**
	 * Sets the thumb of the "Example" widgets.
	 */
	void setWidgetThumb () {
		slider1.setThumb (thumbScale.getSelection ());
	}
}