Java tutorial
/*=============================================================================# # Copyright (c) 2007-2015 Stephan Wahlbrink (WalWare.de) and others. # All rights reserved. This program and the accompanying materials # are made available under the terms of the Eclipse Public License v1.0 # which accompanies this distribution, and is available at # http://www.eclipse.org/legal/epl-v10.html # # Contributors: # Stephan Wahlbrink - initial API and implementation #=============================================================================*/ package de.walware.docmlet.tex.internal.ui.preferences; import java.util.HashMap; import java.util.Map; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.core.databinding.observable.set.WritableSet; import org.eclipse.core.resources.IProject; import org.eclipse.core.runtime.Status; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.EditingSupport; import org.eclipse.jface.viewers.ICellEditorListener; import org.eclipse.jface.viewers.ICellEditorValidator; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.TabFolder; import org.eclipse.swt.widgets.TabItem; import org.eclipse.swt.widgets.Text; import de.walware.ecommons.IStatusChangeListener; import de.walware.ecommons.databinding.IntegerValidator; import de.walware.ecommons.databinding.jface.DataBindingSupport; import de.walware.ecommons.preferences.Preference; import de.walware.ecommons.preferences.ui.ManagedConfigurationBlock; import de.walware.ecommons.text.ui.settings.IndentSettingsUI; import de.walware.ecommons.ui.CombineStatusChangeListener; import de.walware.ecommons.ui.components.EditableTextList; import de.walware.ecommons.ui.util.LayoutUtil; import de.walware.docmlet.tex.core.TexCodeStyleSettings; import de.walware.docmlet.tex.internal.ui.TexUIPlugin; /** * A PreferenceBlock for TexCodeStyleSettings (code formatting preferences). */ public class TexCodeStylePreferenceBlock extends ManagedConfigurationBlock { // in future supporting multiple profiles? // -> we bind to bean not to preferences private class LabelEditing extends EditingSupport { private final TextCellEditor fCellEditor; private final EditableTextList fList; private Object fLast; private IStatusChangeListener fListener; public LabelEditing(final EditableTextList list) { super(list.getViewer()); fList = list; fCellEditor = new TextCellEditor(list.getViewer().getTable()); fCellEditor.addListener(new ICellEditorListener() { @Override public void editorValueChanged(final boolean oldValidState, final boolean newValidState) { if (fListener == null) { fListener = fStatusListener.newListener(); } if (!newValidState) { fListener.statusChanged( new Status(Status.ERROR, TexUIPlugin.PLUGIN_ID, fCellEditor.getErrorMessage())); } else { fListener.statusChanged(Status.OK_STATUS); } } @Override public void applyEditorValue() { fLast = null; if (fListener != null) { fStatusListener.removeListener(fListener); fListener = null; } } @Override public void cancelEditor() { if (fLast == "") { //$NON-NLS-1$ fList.applyChange("", null); //$NON-NLS-1$ } if (fListener != null) { fStatusListener.removeListener(fListener); fListener = null; } } }); fCellEditor.setValidator(new ICellEditorValidator() { @Override public String isValid(final Object value) { final String s = (String) value; for (int i = 0; i < s.length(); i++) { final char c = s.charAt(i); if (!((c >= 0x41 && c <= 0x5A) || (c >= 0x61 && c <= 0x7A) || (c == '*' && i == s.length() - 1))) { return "Invalid environment name"; } } return null; } }); } @Override protected boolean canEdit(final Object element) { return true; } @Override protected CellEditor getCellEditor(final Object element) { return fCellEditor; } @Override protected Object getValue(final Object element) { fLast = element; return element; } @Override protected void setValue(final Object element, final Object value) { if (value != null) { fList.applyChange(element, (value != "") ? value : null); //$NON-NLS-1$ } } } private TexCodeStyleSettings fModel; private IndentSettingsUI fStdIndentSettings; private Text fIndentBlockDepthControl; private Text fIndentEnvDepthControl; private EditableTextList fIndentEnvLabelsControl; private final CombineStatusChangeListener fStatusListener; public TexCodeStylePreferenceBlock(final IProject project, final IStatusChangeListener statusListener) { super(project); fStatusListener = new CombineStatusChangeListener(statusListener); setStatusListener(fStatusListener); } @Override protected void createBlockArea(final Composite pageComposite) { final Map<Preference<?>, String> prefs = new HashMap<Preference<?>, String>(); prefs.put(TexCodeStyleSettings.TAB_SIZE_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.INDENT_DEFAULT_TYPE_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.INDENT_SPACES_COUNT_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.REPLACE_CONVERSATIVE_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.REPLACE_TABS_WITH_SPACES_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.INDENT_BLOCK_DEPTH_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.INDENT_ENV_DEPTH_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); prefs.put(TexCodeStyleSettings.INDENT_ENV_LABELS_PREF, TexCodeStyleSettings.INDENT_GROUP_ID); setupPreferenceManager(prefs); fModel = new TexCodeStyleSettings(0); fStdIndentSettings = new IndentSettingsUI(); final Composite mainComposite = new Composite(pageComposite, SWT.NONE); mainComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); mainComposite.setLayout((LayoutUtil.applyCompositeDefaults(new GridLayout(), 2))); final TabFolder folder = new TabFolder(mainComposite, SWT.NONE); folder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); { final TabItem item = new TabItem(folder, SWT.NONE); item.setText(fStdIndentSettings.getGroupLabel()); item.setControl(createIndentControls(folder)); } { final TabItem item = new TabItem(folder, SWT.NONE); item.setText("&Line Wrapping"); item.setControl(createLineControls(folder)); } initBindings(); updateControls(); } private Control createIndentControls(final Composite parent) { final Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(LayoutUtil.applyTabDefaults(new GridLayout(), 2)); fStdIndentSettings.createControls(composite); LayoutUtil.addSmallFiller(composite, false); final Composite depthComposite = new Composite(composite, SWT.NONE); depthComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); depthComposite.setLayout(LayoutUtil.applyCompositeDefaults(new GridLayout(), 4)); fIndentBlockDepthControl = createIndentDepthLine(depthComposite, Messages.CodeStyle_Indent_IndentInBlocks_label); fIndentEnvDepthControl = createIndentDepthLine(depthComposite, Messages.CodeStyle_Indent_IndentInEnvs_label); { final Label label = new Label(depthComposite, SWT.NONE); final GridData gd = new GridData(SWT.FILL, SWT.CENTER, true, false, 4, 1); gd.horizontalIndent = LayoutUtil.defaultIndent(); label.setLayoutData(gd); label.setText("Environments to be indented:"); } fIndentEnvLabelsControl = new EditableTextList(); { final Control control = fIndentEnvLabelsControl.create(depthComposite, new ViewerComparator()); final GridData gd = new GridData(SWT.FILL, SWT.FILL, false, true, 3, 1); gd.horizontalIndent = LayoutUtil.defaultIndent(); control.setLayoutData(gd); LayoutUtil.addGDDummy(depthComposite, true); } fIndentEnvLabelsControl.getColumn().setEditingSupport(new LabelEditing(fIndentEnvLabelsControl)); LayoutUtil.addSmallFiller(depthComposite, false); LayoutUtil.addSmallFiller(composite, false); return composite; } private Text createIndentDepthLine(final Composite composite, final String label) { final Label labelControl = new Label(composite, SWT.LEFT); labelControl.setText(label); labelControl.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); final Text textControl = new Text(composite, SWT.RIGHT | SWT.SINGLE | SWT.BORDER); final GridData gd = new GridData(SWT.LEFT, SWT.CENTER, false, false); gd.widthHint = LayoutUtil.hintWidth(textControl, 2); textControl.setLayoutData(gd); final Label typeControl = new Label(composite, SWT.LEFT); typeControl.setText(fStdIndentSettings.getLevelUnitLabel()); typeControl.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); LayoutUtil.addGDDummy(composite); return textControl; } private Control createLineControls(final Composite parent) { final Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(LayoutUtil.applyTabDefaults(new GridLayout(), 2)); fStdIndentSettings.addLineWidth(composite); return composite; } @Override protected void addBindings(final DataBindingSupport db) { fStdIndentSettings.addBindings(db, fModel); db.getContext().bindValue(SWTObservables.observeText(fIndentBlockDepthControl, SWT.Modify), BeansObservables.observeValue(db.getRealm(), fModel, TexCodeStyleSettings.INDENT_BLOCK_DEPTH_PROP), new UpdateValueStrategy().setAfterGetValidator( new IntegerValidator(1, 10, Messages.CodeStyle_Indent_IndentInBlocks_error_message)), null); db.getContext().bindValue(SWTObservables.observeText(fIndentEnvDepthControl, SWT.Modify), BeansObservables.observeValue(db.getRealm(), fModel, TexCodeStyleSettings.INDENT_ENV_DEPTH_PROP), new UpdateValueStrategy().setAfterGetValidator( new IntegerValidator(1, 10, Messages.CodeStyle_Indent_IndentInEnvs_error_message)), null); final WritableSet labels = new WritableSet(db.getRealm()); fIndentEnvLabelsControl.setInput(labels); db.getContext().bindSet(labels, BeansObservables.observeSet(db.getRealm(), fModel, TexCodeStyleSettings.INDENT_ENV_LABELS_PROP)); } @Override protected void updateControls() { fModel.load(this); fModel.resetDirty(); getDataBinding().getContext().updateTargets(); // required for invalid target values fIndentEnvLabelsControl.refresh(); } @Override protected void updatePreferences() { if (fModel.isDirty()) { fModel.resetDirty(); setPrefValues(fModel.toPreferencesMap()); } } }