Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2017 IBM Corporation and others. * * This program and the accompanying materials * are made available under the terms of the Eclipse Public License 2.0 * which accompanies this distribution, and is available at * https://www.eclipse.org/legal/epl-2.0/ * * SPDX-License-Identifier: EPL-2.0 * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.swt.examples.controlexample; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.TabFolder; import org.eclipse.swt.widgets.Text; import org.eclipse.swt.widgets.Widget; class TextTab extends ScrollableTab { /* Example widgets and groups that contain them */ Text text; Group textGroup; /* Style widgets added to the "Style" group */ Button wrapButton, readOnlyButton, passwordButton, searchButton, iconCancelButton, iconSearchButton; Button leftButton, centerButton, rightButton; /** * Creates the Tab within a given instance of ControlExample. */ TextTab(ControlExample instance) { super(instance); } /** * Creates the "Example" group. */ @Override void createExampleGroup() { super.createExampleGroup(); /* Create a group for the text widget */ textGroup = new Group(exampleGroup, SWT.NONE); textGroup.setLayout(new GridLayout()); textGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); textGroup.setText("Text"); } /** * Creates the "Example" widgets. */ @Override void createExampleWidgets() { /* Compute the widget style */ int style = getDefaultStyle(); if (singleButton.getSelection()) style |= SWT.SINGLE; if (multiButton.getSelection()) style |= SWT.MULTI; if (horizontalButton.getSelection()) style |= SWT.H_SCROLL; if (verticalButton.getSelection()) style |= SWT.V_SCROLL; if (wrapButton.getSelection()) style |= SWT.WRAP; if (readOnlyButton.getSelection()) style |= SWT.READ_ONLY; if (passwordButton.getSelection()) style |= SWT.PASSWORD; if (searchButton.getSelection()) style |= SWT.SEARCH; if (iconCancelButton.getSelection()) style |= SWT.ICON_CANCEL; if (iconSearchButton.getSelection()) style |= SWT.ICON_SEARCH; if (borderButton.getSelection()) style |= SWT.BORDER; if (leftButton.getSelection()) style |= SWT.LEFT; if (centerButton.getSelection()) style |= SWT.CENTER; if (rightButton.getSelection()) style |= SWT.RIGHT; /* Create the example widgets */ text = new Text(textGroup, style); text.setText(ControlExample.getResourceString("Example_string") + Text.DELIMITER + ControlExample.getResourceString("One_Two_Three")); } /** * Creates the "Style" group. */ @Override void createStyleGroup() { super.createStyleGroup(); /* Create the extra widgets */ wrapButton = new Button(styleGroup, SWT.CHECK); wrapButton.setText("SWT.WRAP"); readOnlyButton = new Button(styleGroup, SWT.CHECK); readOnlyButton.setText("SWT.READ_ONLY"); passwordButton = new Button(styleGroup, SWT.CHECK); passwordButton.setText("SWT.PASSWORD"); searchButton = new Button(styleGroup, SWT.CHECK); searchButton.setText("SWT.SEARCH"); iconCancelButton = new Button(styleGroup, SWT.CHECK); iconCancelButton.setText("SWT.ICON_CANCEL"); iconSearchButton = new Button(styleGroup, SWT.CHECK); iconSearchButton.setText("SWT.ICON_SEARCH"); Composite alignmentGroup = new Composite(styleGroup, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginWidth = layout.marginHeight = 0; alignmentGroup.setLayout(layout); alignmentGroup.setLayoutData(new GridData(GridData.FILL_BOTH)); leftButton = new Button(alignmentGroup, SWT.RADIO); leftButton.setText("SWT.LEFT"); centerButton = new Button(alignmentGroup, SWT.RADIO); centerButton.setText("SWT.CENTER"); rightButton = new Button(alignmentGroup, SWT.RADIO); rightButton.setText("SWT.RIGHT"); } /** * Creates the tab folder page. * * @param tabFolder org.eclipse.swt.widgets.TabFolder * @return the new page for the tab folder */ @Override Composite createTabFolderPage(TabFolder tabFolder) { super.createTabFolderPage(tabFolder); /* * Add a resize listener to the tabFolderPage so that * if the user types into the example widget to change * its preferred size, and then resizes the shell, we * recalculate the preferred size correctly. */ tabFolderPage.addControlListener(ControlListener.controlResizedAdapter(e -> setExampleWidgetSize())); return tabFolderPage; } /** * Gets the "Example" widget children. */ @Override Widget[] getExampleWidgets() { return new Widget[] { text }; } /** * Returns a list of set/get API method names (without the set/get prefix) * that can be used to set/get values in the example control(s). */ @Override String[] getMethodNames() { return new String[] { "DoubleClickEnabled", "EchoChar", "Editable", "Message", "Orientation", "Selection", "Tabs", "Text", "TextChars", "TextLimit", "ToolTipText", "TopIndex" }; } /** * Gets the text for the tab folder item. */ @Override String getTabText() { return "Text"; } /** * Sets the state of the "Example" widgets. */ @Override void setExampleWidgetState() { super.setExampleWidgetState(); wrapButton.setSelection((text.getStyle() & SWT.WRAP) != 0); readOnlyButton.setSelection((text.getStyle() & SWT.READ_ONLY) != 0); passwordButton.setSelection((text.getStyle() & SWT.PASSWORD) != 0); searchButton.setSelection((text.getStyle() & SWT.SEARCH) != 0); leftButton.setSelection((text.getStyle() & SWT.LEFT) != 0); centerButton.setSelection((text.getStyle() & SWT.CENTER) != 0); rightButton.setSelection((text.getStyle() & SWT.RIGHT) != 0); /* Special case: ICON_CANCEL and H_SCROLL have the same value, * and ICON_SEARCH and V_SCROLL have the same value, * so to avoid confusion, only set CANCEL if SEARCH is set. */ if ((text.getStyle() & SWT.SEARCH) != 0) { iconCancelButton.setSelection((text.getStyle() & SWT.ICON_CANCEL) != 0); iconSearchButton.setSelection((text.getStyle() & SWT.ICON_SEARCH) != 0); horizontalButton.setSelection(false); verticalButton.setSelection(false); } else { iconCancelButton.setSelection(false); iconSearchButton.setSelection(false); horizontalButton.setSelection((text.getStyle() & SWT.H_SCROLL) != 0); verticalButton.setSelection((text.getStyle() & SWT.V_SCROLL) != 0); } passwordButton.setEnabled((text.getStyle() & SWT.SINGLE) != 0); searchButton.setEnabled((text.getStyle() & SWT.SINGLE) != 0); iconCancelButton.setEnabled((text.getStyle() & SWT.SEARCH) != 0); iconSearchButton.setEnabled((text.getStyle() & SWT.SEARCH) != 0); wrapButton.setEnabled((text.getStyle() & SWT.MULTI) != 0); horizontalButton.setEnabled((text.getStyle() & SWT.MULTI) != 0); verticalButton.setEnabled((text.getStyle() & SWT.MULTI) != 0); } }