Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2013 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.*; import org.eclipse.swt.widgets.*; import org.eclipse.swt.layout.*; class LabelTab extends AlignableTab { /* Example widgets and groups that contain them */ Label label1, label2, label3, label4, label5, label6; Group textLabelGroup, imageLabelGroup; /* Style widgets added to the "Style" group */ Button wrapButton, separatorButton, horizontalButton, verticalButton, shadowInButton, shadowOutButton, shadowNoneButton; /** * Creates the Tab within a given instance of ControlExample. */ LabelTab(ControlExample instance) { super(instance); } /** * Creates the "Example" group. */ @Override void createExampleGroup() { super.createExampleGroup(); /* Create a group for the text labels */ textLabelGroup = new Group(exampleGroup, SWT.NONE); GridLayout gridLayout = new GridLayout(); textLabelGroup.setLayout(gridLayout); gridLayout.numColumns = 3; textLabelGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); textLabelGroup.setText(ControlExample.getResourceString("Text_Labels")); /* Create a group for the image labels */ imageLabelGroup = new Group(exampleGroup, SWT.SHADOW_NONE); gridLayout = new GridLayout(); imageLabelGroup.setLayout(gridLayout); gridLayout.numColumns = 3; imageLabelGroup.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); imageLabelGroup.setText(ControlExample.getResourceString("Image_Labels")); } /** * Creates the "Example" widgets. */ @Override void createExampleWidgets() { /* Compute the widget style */ int style = getDefaultStyle(); if (wrapButton.getSelection()) style |= SWT.WRAP; if (separatorButton.getSelection()) style |= SWT.SEPARATOR; if (horizontalButton.getSelection()) style |= SWT.HORIZONTAL; if (verticalButton.getSelection()) style |= SWT.VERTICAL; if (shadowInButton.getSelection()) style |= SWT.SHADOW_IN; if (shadowOutButton.getSelection()) style |= SWT.SHADOW_OUT; if (shadowNoneButton.getSelection()) style |= SWT.SHADOW_NONE; 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 */ label1 = new Label(textLabelGroup, style); label1.setText(ControlExample.getResourceString("One")); label2 = new Label(textLabelGroup, style); label2.setText(ControlExample.getResourceString("Two")); label3 = new Label(textLabelGroup, style); if (wrapButton.getSelection()) { label3.setText(ControlExample.getResourceString("Wrap_Text")); } else { label3.setText(ControlExample.getResourceString("Three")); } label4 = new Label(imageLabelGroup, style); label4.setImage(instance.images[ControlExample.ciClosedFolder]); label5 = new Label(imageLabelGroup, style); label5.setImage(instance.images[ControlExample.ciOpenFolder]); label6 = new Label(imageLabelGroup, style); label6.setImage(instance.images[ControlExample.ciTarget]); } /** * Creates the "Style" group. */ @Override void createStyleGroup() { super.createStyleGroup(); /* Create the extra widgets */ wrapButton = new Button(styleGroup, SWT.CHECK); wrapButton.setText("SWT.WRAP"); separatorButton = new Button(styleGroup, SWT.CHECK); separatorButton.setText("SWT.SEPARATOR"); horizontalButton = new Button(styleGroup, SWT.RADIO); horizontalButton.setText("SWT.HORIZONTAL"); verticalButton = new Button(styleGroup, SWT.RADIO); verticalButton.setText("SWT.VERTICAL"); Group styleSubGroup = new Group(styleGroup, SWT.NONE); styleSubGroup.setLayout(new GridLayout()); shadowInButton = new Button(styleSubGroup, SWT.RADIO); shadowInButton.setText("SWT.SHADOW_IN"); shadowOutButton = new Button(styleSubGroup, SWT.RADIO); shadowOutButton.setText("SWT.SHADOW_OUT"); shadowNoneButton = new Button(styleSubGroup, SWT.RADIO); shadowNoneButton.setText("SWT.SHADOW_NONE"); borderButton = new Button(styleGroup, SWT.CHECK); borderButton.setText("SWT.BORDER"); } /** * Gets the "Example" widget children. */ @Override Widget[] getExampleWidgets() { return new Widget[] { label1, label2, label3, label4, label5, label6 }; } /** * 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[] { "Text", "ToolTipText" }; } /** * Gets the text for the tab folder item. */ @Override String getTabText() { return "Label"; } /** * Sets the alignment of the "Example" widgets. */ @Override void setExampleWidgetAlignment() { int alignment = 0; if (leftButton.getSelection()) alignment = SWT.LEFT; if (centerButton.getSelection()) alignment = SWT.CENTER; if (rightButton.getSelection()) alignment = SWT.RIGHT; label1.setAlignment(alignment); label2.setAlignment(alignment); label3.setAlignment(alignment); label4.setAlignment(alignment); label5.setAlignment(alignment); label6.setAlignment(alignment); } /** * Sets the state of the "Example" widgets. */ @Override void setExampleWidgetState() { super.setExampleWidgetState(); boolean isSeparator = (label1.getStyle() & SWT.SEPARATOR) != 0; wrapButton.setSelection(!isSeparator && (label1.getStyle() & SWT.WRAP) != 0); leftButton.setSelection(!isSeparator && (label1.getStyle() & SWT.LEFT) != 0); centerButton.setSelection(!isSeparator && (label1.getStyle() & SWT.CENTER) != 0); rightButton.setSelection(!isSeparator && (label1.getStyle() & SWT.RIGHT) != 0); shadowInButton.setSelection(isSeparator && (label1.getStyle() & SWT.SHADOW_IN) != 0); shadowOutButton.setSelection(isSeparator && (label1.getStyle() & SWT.SHADOW_OUT) != 0); shadowNoneButton.setSelection(isSeparator && (label1.getStyle() & SWT.SHADOW_NONE) != 0); horizontalButton.setSelection(isSeparator && (label1.getStyle() & SWT.HORIZONTAL) != 0); verticalButton.setSelection(isSeparator && (label1.getStyle() & SWT.VERTICAL) != 0); wrapButton.setEnabled(!isSeparator); leftButton.setEnabled(!isSeparator); centerButton.setEnabled(!isSeparator); rightButton.setEnabled(!isSeparator); shadowInButton.setEnabled(isSeparator); shadowOutButton.setEnabled(isSeparator); shadowNoneButton.setEnabled(isSeparator); horizontalButton.setEnabled(isSeparator); verticalButton.setEnabled(isSeparator); } }