Java tutorial
/* * Copyright 2016 Albert Tregnaghi * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions * and limitations under the License. * */ package de.jcup.egradle.eclipse.ui; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.eclipse.debug.ui.StringVariableSelectionDialog; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; 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.Control; import org.eclipse.swt.widgets.DirectoryDialog; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class MultipleInputDialog extends Dialog { private static final String EMPTY_STRING = ""; protected static final String FIELD_NAME = "FIELD_NAME"; //$NON-NLS-1$ protected static final int TEXT = 100; protected static final int BROWSE = 101; protected static final int VARIABLE = 102; protected static final int MULTILINE_VARIABLE = 103; protected Composite panel; protected List<FieldSummary> fieldList = new ArrayList<FieldSummary>(); protected List<Text> controlList = new ArrayList<Text>(); protected List<Validator> validators = new ArrayList<Validator>(); protected Map<Object, String> valueMap = new HashMap<Object, String>(); private String title; public MultipleInputDialog(Shell shell, String title) { super(shell); this.title = title; setShellStyle(getShellStyle() | SWT.RESIZE); } @Override protected void configureShell(Shell shell) { super.configureShell(shell); if (title != null) { shell.setText(title); } } @Override protected Control createButtonBar(Composite parent) { Control bar = super.createButtonBar(parent); validateFields(); return bar; } @Override protected Control createDialogArea(Composite parent) { Composite container = (Composite) super.createDialogArea(parent); container.setLayout(new GridLayout(2, false)); container.setLayoutData(new GridData(GridData.FILL_BOTH)); panel = new Composite(container, SWT.NONE); GridLayout layout = new GridLayout(2, false); panel.setLayout(layout); panel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); for (FieldSummary field : fieldList) { switch (field.type) { case TEXT: createTextField(field.name, field.initialValue, field.allowsEmpty); break; case BROWSE: createBrowseField(field.name, field.initialValue, field.allowsEmpty); break; case VARIABLE: createVariablesField(field.name, field.initialValue, field.allowsEmpty); break; case MULTILINE_VARIABLE: createMultilineVariablesField(field.name, field.initialValue, field.allowsEmpty); break; default: break; } } fieldList = null; // allow it to be gc'd Dialog.applyDialogFont(container); return container; } public void addBrowseField(String labelText, String initialValue, boolean allowsEmpty) { fieldList.add(new FieldSummary(BROWSE, labelText, initialValue, allowsEmpty)); } public void addTextField(String labelText, String initialValue, boolean allowsEmpty) { fieldList.add(new FieldSummary(TEXT, labelText, initialValue, allowsEmpty)); } public void addVariablesField(String labelText, String initialValue, boolean allowsEmpty) { fieldList.add(new FieldSummary(VARIABLE, labelText, initialValue, allowsEmpty)); } public void addMultilinedVariablesField(String labelText, String initialValue, boolean allowsEmpty) { fieldList.add(new FieldSummary(MULTILINE_VARIABLE, labelText, initialValue, allowsEmpty)); } protected void createTextField(String labelText, String initialValue, boolean allowEmpty) { Label label = new Label(panel, SWT.NONE); label.setText(labelText); label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING)); final Text text = new Text(panel, SWT.SINGLE | SWT.BORDER); text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); text.setData(FIELD_NAME, labelText); // make sure rows are the same height on both panels. label.setSize(label.getSize().x, text.getSize().y); if (initialValue != null) { text.setText(initialValue); } if (!allowEmpty) { validators.add(new Validator() { @Override public boolean validate() { return !text.getText().equals(EMPTY_STRING); } }); text.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { validateFields(); } }); } controlList.add(text); } protected void createBrowseField(String labelText, String initialValue, boolean allowEmpty) { Label label = new Label(panel, SWT.NONE); label.setText(labelText); label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING)); Composite comp = new Composite(panel, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; comp.setLayout(layout); comp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); final Text text = new Text(comp, SWT.SINGLE | SWT.BORDER); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.widthHint = 200; text.setLayoutData(data); text.setData(FIELD_NAME, labelText); // make sure rows are the same height on both panels. label.setSize(label.getSize().x, text.getSize().y); if (initialValue != null) { text.setText(initialValue); } if (!allowEmpty) { validators.add(new Validator() { @Override public boolean validate() { return !text.getText().equals(EMPTY_STRING); } }); text.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { validateFields(); } }); } Button button = createButton(comp, IDialogConstants.IGNORE_ID, "&Browse...", false); button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { DirectoryDialog dialog = new DirectoryDialog(getShell()); dialog.setMessage("Select a file:"); String currentWorkingDir = text.getText(); if (!currentWorkingDir.trim().equals(EMPTY_STRING)) { File path = new File(currentWorkingDir); if (path.exists()) { dialog.setFilterPath(currentWorkingDir); } } String selectedDirectory = dialog.open(); if (selectedDirectory != null) { text.setText(selectedDirectory); } } }); controlList.add(text); } public void createVariablesField(String labelText, String initialValue, boolean allowEmpty) { Label label = new Label(panel, SWT.NONE); label.setText(labelText); label.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING)); Composite comp = new Composite(panel, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; comp.setLayout(layout); comp.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); final Text text = new Text(comp, SWT.SINGLE | SWT.BORDER); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.widthHint = 200; text.setLayoutData(data); text.setData(FIELD_NAME, labelText); // make sure rows are the same height on both panels. label.setSize(label.getSize().x, text.getSize().y); if (initialValue != null) { text.setText(initialValue); } if (!allowEmpty) { validators.add(new Validator() { @Override public boolean validate() { return !text.getText().equals(EMPTY_STRING); } }); text.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { validateFields(); } }); } Button button = createButton(comp, IDialogConstants.IGNORE_ID, "Varia&bles...", false); button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { StringVariableSelectionDialog dialog = new StringVariableSelectionDialog(getShell()); int code = dialog.open(); if (code == IDialogConstants.OK_ID) { String variable = dialog.getVariableExpression(); if (variable != null) { text.insert(variable); } } } }); controlList.add(text); } public void createMultilineVariablesField(String labelText, String initialValue, boolean allowEmpty) { Label label = new Label(panel, SWT.NONE); label.setText(labelText); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gd.horizontalSpan = 2; label.setLayoutData(gd); final Text text = new Text(panel, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL); gd = new GridData(GridData.FILL_BOTH); gd.widthHint = 300; gd.heightHint = 4 * text.getLineHeight(); gd.horizontalSpan = 2; text.setLayoutData(gd); text.setData(FIELD_NAME, labelText); text.addTraverseListener(new TraverseListener() { @Override public void keyTraversed(TraverseEvent e) { if (e.detail == SWT.TRAVERSE_RETURN && e.stateMask == SWT.SHIFT) { e.doit = true; } } }); // make sure rows are the same height on both panels. label.setSize(label.getSize().x, text.getSize().y); if (initialValue != null) { text.setText(initialValue); } if (!allowEmpty) { validators.add(new Validator() { @Override public boolean validate() { return !text.getText().equals(EMPTY_STRING); } }); text.addModifyListener(new ModifyListener() { @Override public void modifyText(ModifyEvent e) { validateFields(); } }); } Composite comp = SWTFactory.createComposite(panel, panel.getFont(), 1, 2, GridData.HORIZONTAL_ALIGN_END); GridLayout ld = (GridLayout) comp.getLayout(); ld.marginHeight = 1; ld.marginWidth = 0; ld.horizontalSpacing = 0; Button button = createButton(comp, IDialogConstants.IGNORE_ID, "Varia&bles...", false); button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { StringVariableSelectionDialog dialog = new StringVariableSelectionDialog(getShell()); int code = dialog.open(); if (code == IDialogConstants.OK_ID) { String variable = dialog.getVariableExpression(); if (variable != null) { text.insert(variable); } } } }); controlList.add(text); } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.Dialog#okPressed() */ @Override protected void okPressed() { for (Text control : controlList) { valueMap.put(control.getData(FIELD_NAME), control.getText()); } controlList = null; super.okPressed(); } /* * (non-Javadoc) * * @see org.eclipse.jface.window.Window#open() */ @Override public int open() { applyDialogFont(panel); return super.open(); } public Object getValue(String key) { return valueMap.get(key); } public String getStringValue(String key) { return (String) getValue(key); } public void validateFields() { for (Validator validator : validators) { if (!validator.validate()) { getButton(IDialogConstants.OK_ID).setEnabled(false); return; } } getButton(IDialogConstants.OK_ID).setEnabled(true); } protected class FieldSummary { int type; String name; String initialValue; boolean allowsEmpty; public FieldSummary(int type, String name, String initialValue, boolean allowsEmpty) { this.type = type; this.name = name; this.initialValue = initialValue; this.allowsEmpty = allowsEmpty; } } protected class Validator { boolean validate() { return true; } } }