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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.wizards.dialogfields;
  12
  13 import org.eclipse.swt.events.ModifyEvent;
  14 import org.eclipse.swt.events.ModifyListener;
  15 import org.eclipse.swt.events.SelectionEvent;
  16 import org.eclipse.swt.events.SelectionListener;
  17 import org.eclipse.swt.layout.GridData;
  18 import org.eclipse.swt.widgets.Combo;
  19 import org.eclipse.swt.widgets.Composite;
  20 import org.eclipse.swt.widgets.Control;
  21 import org.eclipse.swt.widgets.Label;
  22
  23 /**
  24  * Dialog field containing a label and a combo control.
  25  */
  26 public class ComboDialogField extends DialogField {
  27
  28         private String fText;
  29
  30         private int fSelectionIndex;
  31
  32         private String[] fItems;
  33
  34         private Combo fComboControl;
  35
  36         private ModifyListener fModifyListener;
  37
  38         private int fFlags;
  39
  40         public ComboDialogField(int flags) {
  41                 super();
  42                 fText = ""; //$NON-NLS-1$
  43                 fItems = new String[0];
  44                 fFlags = flags;
  45                 fSelectionIndex = -1;
  46         }
  47
  48         // ------- layout helpers
  49
  50         /*
  51          * @see DialogField#doFillIntoGrid
  52          */
  53         public Control[] doFillIntoGrid(Composite parent, int nColumns) {
  54                 assertEnoughColumns(nColumns);
  55
  56                 Label label = getLabelControl(parent);
  57                 label.setLayoutData(gridDataForLabel(1));
  58                 Combo combo = getComboControl(parent);
  59                 combo.setLayoutData(gridDataForCombo(nColumns - 1));
  60
  61                 return new Control[] { label, combo };
  62         }
  63
  64         /*
  65          * @see DialogField#getNumberOfControls
  66          */
  67         public int getNumberOfControls() {
  68                 return 2;
  69         }
  70
  71         protected static GridData gridDataForCombo(int span) {
  72                 GridData gd = new GridData();
  73                 gd.horizontalAlignment = GridData.FILL;
  74                 gd.grabExcessHorizontalSpace = false;
  75                 gd.horizontalSpan = span;
  76                 return gd;
  77         }
  78
  79         // ------- focus methods
  80
  81         /*
  82          * @see DialogField#setFocus
  83          */
  84         public boolean setFocus() {
  85                 if (isOkToUse(fComboControl)) {
  86                         fComboControl.setFocus();
  87                 }
  88                 return true;
  89         }
  90
  91         // ------- ui creation
  92
  93         /**
  94          * Creates or returns the created combo control.
  95          *
  96          * @param parent
  97          *            The parent composite or <code>null</code> when the widget
  98          *            has already been created.
  99          */
 100         public Combo getComboControl(Composite parent) {
 101                 if (fComboControl == null) {
 102                         assertCompositeNotNull(parent);
 103                         fModifyListener = new ModifyListener() {
 104                                 public void modifyText(ModifyEvent e) {
 105                                         doModifyText(e);
 106                                 }
 107                         };
 108                         SelectionListener selectionListener = new SelectionListener() {
 109                                 public void widgetSelected(SelectionEvent e) {
 110                                         doSelectionChanged(e);
 111                                 }
 112
 113                                 public void widgetDefaultSelected(SelectionEvent e) {
 114                                 };
 115                         };
 116
 117                         fComboControl = new Combo(parent, fFlags);
 118                         // moved up due to 1GEUNW2
 119                         fComboControl.setItems(fItems);
 120                         if (fSelectionIndex != -1) {
 121                                 fComboControl.select(fSelectionIndex);
 122                         } else {
 123                                 fComboControl.setText(fText);
 124                         }
 125                         fComboControl.setFont(parent.getFont());
 126                         fComboControl.addModifyListener(fModifyListener);
 127                         fComboControl.addSelectionListener(selectionListener);
 128                         fComboControl.setEnabled(isEnabled());
 129                 }
 130                 return fComboControl;
 131         }
 132
 133         private void doModifyText(ModifyEvent e) {
 134                 if (isOkToUse(fComboControl)) {
 135                         fText = fComboControl.getText();
 136                         fSelectionIndex = fComboControl.getSelectionIndex();
 137                 }
 138                 dialogFieldChanged();
 139         }
 140
 141         private void doSelectionChanged(SelectionEvent e) {
 142                 if (isOkToUse(fComboControl)) {
 143                         fItems = fComboControl.getItems();
 144                         fText = fComboControl.getText();
 145                         fSelectionIndex = fComboControl.getSelectionIndex();
 146                 }
 147                 dialogFieldChanged();
 148         }
 149
 150         // ------ enable / disable management
 151
 152         /*
 153          * @see DialogField#updateEnableState
 154          */
 155         protected void updateEnableState() {
 156                 super.updateEnableState();
 157                 if (isOkToUse(fComboControl)) {
 158                         fComboControl.setEnabled(isEnabled());
 159                 }
 160         }
 161
 162         // ------ text access
 163
 164         /**
 165          * Gets the combo items.
 166          */
 167         public String[] getItems() {
 168                 return fItems;
 169         }
 170
 171         /**
 172          * Sets the combo items. Triggers a dialog-changed event.
 173          */
 174         public void setItems(String[] items) {
 175                 fItems = items;
 176                 if (isOkToUse(fComboControl)) {
 177                         fComboControl.setItems(items);
 178                 }
 179                 dialogFieldChanged();
 180         }
 181
 182         /**
 183          * Gets the text.
 184          */
 185         public String getText() {
 186                 return fText;
 187         }
 188
 189         /**
 190          * Sets the text. Triggers a dialog-changed event.
 191          */
 192         public void setText(String text) {
 193                 fText = text;
 194                 if (isOkToUse(fComboControl)) {
 195                         fComboControl.setText(text);
 196                 } else {
 197                         dialogFieldChanged();
 198                 }
 199         }
 200
 201         /**
 202          * Selects an item.
 203          */
 204         public void selectItem(int index) {
 205                 if (isOkToUse(fComboControl)) {
 206                         fComboControl.select(index);
 207                 } else {
 208                         if (index >= 0 && index < fItems.length) {
 209                                 fText = fItems[index];
 210                                 fSelectionIndex = index;
 211                         }
 212                 }
 213                 dialogFieldChanged();
 214         }
 215
 216         public int getSelectionIndex() {
 217                 return fSelectionIndex;
 218         }
 219
 220         /**
 221          * Sets the text without triggering a dialog-changed event.
 222          */
 223         public void setTextWithoutUpdate(String text) {
 224                 fText = text;
 225                 if (isOkToUse(fComboControl)) {
 226                         fComboControl.removeModifyListener(fModifyListener);
 227                         fComboControl.setText(text);
 228                         fComboControl.addModifyListener(fModifyListener);
 229                 }
 230         }
 231
 232 }