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