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   1 package net.sourceforge.phpdt.externaltools.internal.dialog;
   2
   3 /**********************************************************************
   4 Copyright (c) 2002 IBM Corp. and others. All rights reserved.
   5 This file is made available under the terms of the Common Public License v1.0
   6 which accompanies this distribution, and is available at
   7 http://www.eclipse.org/legal/cpl-v10.html
   8 �
   9 Contributors:
  10 **********************************************************************/
  11
  12 import net.sourceforge.phpdt.externaltools.group.IGroupDialogPage;
  13 import net.sourceforge.phpdt.externaltools.internal.registry.ExternalToolVariable;
  14 import net.sourceforge.phpdt.externaltools.model.ToolUtil;
  15 import net.sourceforge.phpdt.externaltools.variable.IVariableComponent;
  16
  17 import org.eclipse.swt.SWT;
  18 import org.eclipse.swt.custom.StackLayout;
  19 import org.eclipse.swt.events.SelectionAdapter;
  20 import org.eclipse.swt.events.SelectionEvent;
  21 import org.eclipse.swt.graphics.Font;
  22 import org.eclipse.swt.graphics.Point;
  23 import org.eclipse.swt.layout.GridData;
  24 import org.eclipse.swt.layout.GridLayout;
  25 import org.eclipse.swt.widgets.Composite;
  26 import org.eclipse.swt.widgets.Control;
  27 import org.eclipse.swt.widgets.Label;
  28 import org.eclipse.swt.widgets.List;
  29
  30 /**
  31  * Visual grouping of controls that allows the user to
  32  * select a variable and configure it with extra
  33  * information.
  34  */
  35 public class ExternalToolVariableForm {
  36         private static final int VISIBLE_ITEM_COUNT = 9;
  37
  38         private String variableListLabelText;
  39         private ExternalToolVariable[] variables;
  40         private IVariableComponent[] components;
  41         private IGroupDialogPage page;
  42
  43         private Label variableListLabel;
  44         private List variableList;
  45         private Composite variableComposite;
  46         private StackLayout variableLayout;
  47         private int activeComponentIndex = -1;
  48
  49         /**
  50          * Creates the visual grouping
  51          *
  52          * @param variableListLabelText the label text to use for identifying the list of variables
  53          * @param variables the collection of variables to display to the user
  54          */
  55         public ExternalToolVariableForm(String variableListLabelText, ExternalToolVariable[] variables) {
  56                 super();
  57                 this.variableListLabelText = variableListLabelText;
  58                 this.variables = variables;
  59                 this.components = new IVariableComponent[variables.length];
  60         }
  61
  62         public Composite createContents(Composite parent, IGroupDialogPage page) {
  63                 Font font = parent.getFont();
  64
  65                 this.page = page;
  66
  67                 Composite mainComposite = new Composite(parent, SWT.NONE);
  68                 GridLayout layout = new GridLayout();
  69                 layout.marginWidth = 0;
  70                 layout.marginHeight = 0;
  71                 layout.numColumns = 1;
  72                 GridData data = new GridData(GridData.FILL_BOTH);
  73                 mainComposite.setLayout(layout);
  74                 mainComposite.setLayoutData(data);
  75
  76                 variableListLabel = new Label(mainComposite, SWT.NONE);
  77                 variableListLabel.setText(variableListLabelText);
  78                 data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
  79                 data.horizontalSpan = 1;
  80                 variableListLabel.setLayoutData(data);
  81                 variableListLabel.setFont(font);
  82
  83                 variableList = new List(mainComposite, SWT.SINGLE | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
  84                 data = new GridData(GridData.FILL_HORIZONTAL);
  85                 data.heightHint = variableList.getItemHeight() * VISIBLE_ITEM_COUNT;
  86                 variableList.setLayoutData(data);
  87                 variableList.setFont(font);
  88
  89                 variableComposite = new Composite(mainComposite, SWT.NONE);
  90                 variableLayout = new StackLayout();
  91                 variableLayout.marginWidth = 0;
  92                 variableLayout.marginHeight = 0;
  93                 data = new GridData(GridData.FILL_BOTH);
  94                 variableComposite.setLayout(variableLayout);
  95                 variableComposite.setLayoutData(data);
  96                 variableComposite.setFont(font);
  97
  98                 createVariableComponents(data);
  99
 100                 populateVariableList();
 101
 102                 variableList.addSelectionListener(new SelectionAdapter() {
 103                         public void widgetSelected(SelectionEvent e) {
 104                                 updateVariableComposite(null, false);
 105                         }
 106                 });
 107
 108                 setEnabled(true);
 109                 return mainComposite;
 110         }
 111
 112         /**
 113          * Creates the visual component for each variable
 114          * and determine the initial size so the form
 115          * can be layout properly.
 116          */
 117         private void createVariableComponents(GridData data) {
 118                 for (int i = 0; i < variables.length; i++) {
 119                         ExternalToolVariable var = variables[i];
 120                         components[i] = var.getComponent();
 121                         components[i].createContents(variableComposite, var.getTag(), page);
 122                         Control control = components[i].getControl();
 123                         if (control != null) {
 124                                 Point newSize = control.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
 125                                 data.widthHint = Math.max(newSize.x, data.widthHint);
 126                                 data.heightHint = Math.max(newSize.y, data.heightHint);
 127                         }
 128                 }
 129         }
 130
 131         /**
 132          * Returns the formatted variable or <code>null</code> if
 133          * none selected.
 134          */
 135         public String getSelectedVariable() {
 136                 if (activeComponentIndex != -1) {
 137                         String varValue = components[activeComponentIndex].getVariableValue();
 138                         return ToolUtil.buildVariableTag(variables[activeComponentIndex].getTag(), varValue);
 139                 }
 140
 141                 return null;
 142         }
 143
 144         /**
 145          * Returns whether the current variable selection is
 146          * valid, including the selected variable value.
 147          */
 148         public boolean isValid() {
 149                 if (activeComponentIndex != -1)
 150                         return components[activeComponentIndex].isValid();
 151
 152                 return true;
 153         }
 154
 155         private void populateVariableList() {
 156                 String[] items = new String[variables.length];
 157                 StringBuffer buffer = new StringBuffer(80);
 158                 for (int i = 0; i < variables.length; i++) {
 159                         ToolUtil.buildVariableTag(variables[i].getTag(), null, buffer);
 160                         buffer.append(" - "); //$NON-NLS-1$
 161                         buffer.append(variables[i].getDescription());
 162                         items[i] = buffer.toString();
 163                         buffer.setLength(0);
 164                 }
 165                 variableList.setItems(items);
 166         }
 167
 168         public void selectVariable(String varName, String varValue) {
 169                 if (varName != null && varName.length() > 0) {
 170                         for (int i = 0; i < variables.length; i++) {
 171                                 if (varName.equals(variables[i].getTag())) {
 172                                         variableList.select(i);
 173                                         updateVariableComposite(varValue, true);
 174                                         return;
 175                                 }
 176                         }
 177                 }
 178
 179                 variableList.deselectAll();
 180                 updateVariableComposite(varValue, false);
 181         }
 182
 183         private void setComponentVisible(int index) {
 184                 if (index == -1)
 185                         variableLayout.topControl = null;
 186                 else
 187                         variableLayout.topControl = components[index].getControl();
 188                 variableComposite.layout();
 189         }
 190
 191         /**
 192          * Enables or disables the variable form controls.
 193          */
 194         public void setEnabled(boolean enabled) {
 195                 variableListLabel.setEnabled(enabled);
 196                 variableList.setEnabled(enabled);
 197                 if (enabled && variableList.getSelection().length == 0) {
 198                         if (variableList.getItemCount() > 0) {
 199                                 variableList.select(0);
 200                                 activeComponentIndex= 0;
 201                         }
 202                 }
 203                 variableComposite.setVisible(enabled);
 204         }
 205
 206         private void updateVariableComposite(String value, boolean setValue) {
 207                 activeComponentIndex = variableList.getSelectionIndex();
 208                 setComponentVisible(activeComponentIndex);
 209                 if (activeComponentIndex != -1 && setValue)
 210                         components[activeComponentIndex].setVariableValue(value);
 211         }
 212
 213         /**
 214          * Validates the current variable selection is and
 215          * its value are acceptable.
 216          */
 217         public void validate() {
 218                 if (activeComponentIndex != -1)
 219                         components[activeComponentIndex].validate();
 220         }
 221 }