core/org.argeo.suite.ui/src/org/argeo/suite/ui/widgets/TabbedArea.java

   1 package org.argeo.suite.ui.widgets;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import javax.jcr.Node;
   7
   8 import org.argeo.cms.ui.CmsUiProvider;
   9 import org.argeo.cms.ui.util.CmsUiUtils;
  10 import org.argeo.cms.ui.viewers.Section;
  11 import org.argeo.eclipse.ui.Selected;
  12 import org.argeo.jcr.Jcr;
  13 import org.eclipse.swt.SWT;
  14 import org.eclipse.swt.custom.StackLayout;
  15 import org.eclipse.swt.graphics.Image;
  16 import org.eclipse.swt.layout.GridData;
  17 import org.eclipse.swt.layout.GridLayout;
  18 import org.eclipse.swt.widgets.Button;
  19 import org.eclipse.swt.widgets.Composite;
  20 import org.eclipse.swt.widgets.Control;
  21 import org.eclipse.swt.widgets.Label;
  22 import org.eclipse.swt.widgets.ToolBar;
  23 import org.eclipse.swt.widgets.ToolItem;
  24
  25 /** Manages {@link Section} in a tab-like structure. */
  26 public class TabbedArea extends Composite {
  27         private static final long serialVersionUID = 8659669229482033444L;
  28
  29         private Composite headers;
  30         private Composite body;
  31
  32         private List<Section> sections = new ArrayList<>();
  33
  34         private Node previousNode;
  35         private CmsUiProvider previousUiProvider;
  36         private CmsUiProvider currentUiProvider;
  37
  38         private String tabStyle;
  39         private String tabSelectedStyle;
  40         private String bodyStyle;
  41         private Image closeIcon;
  42
  43         private StackLayout stackLayout;
  44
  45         private boolean singleTab = false;
  46
  47         public TabbedArea(Composite parent, int style) {
  48                 super(parent, style);
  49                 CmsUiUtils.style(parent, bodyStyle);
  50
  51                 setLayout(CmsUiUtils.noSpaceGridLayout());
  52
  53                 // TODO manage tabs at bottom or sides
  54                 headers = new Composite(this, SWT.NONE);
  55                 headers.setLayoutData(CmsUiUtils.fillWidth());
  56                 body = new Composite(this, SWT.NONE);
  57                 body.setLayoutData(CmsUiUtils.fillAll());
  58                 // body.setLayout(new FormLayout());
  59                 stackLayout = new StackLayout();
  60                 body.setLayout(stackLayout);
  61                 emptyState();
  62         }
  63
  64         protected void refreshTabHeaders() {
  65                 int tabCount = sections.size() > 0 ? sections.size() : 1;
  66                 for (Control tab : headers.getChildren())
  67                         tab.dispose();
  68
  69                 headers.setLayout(CmsUiUtils.noSpaceGridLayout(new GridLayout(tabCount, true)));
  70
  71                 if (sections.size() == 0) {
  72                         Composite emptyHeader = new Composite(headers, SWT.NONE);
  73                         emptyHeader.setLayoutData(CmsUiUtils.fillAll());
  74                         emptyHeader.setLayout(new GridLayout());
  75                         Label lbl = new Label(emptyHeader, SWT.NONE);
  76                         lbl.setText("");
  77                         lbl.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false));
  78
  79                 }
  80
  81                 Section currentSection = getCurrentSection();
  82                 for (Section section : sections) {
  83                         boolean selected = section == currentSection;
  84                         Composite sectionHeader = section.createHeader(headers);
  85                         CmsUiUtils.style(sectionHeader, selected ? tabSelectedStyle : tabStyle);
  86                         int headerColumns = singleTab ? 1 : 2;
  87                         sectionHeader.setLayout(new GridLayout(headerColumns, false));
  88                         sectionHeader.setLayout(CmsUiUtils.noSpaceGridLayout(headerColumns));
  89                         Button title = new Button(sectionHeader, SWT.FLAT);
  90                         CmsUiUtils.style(title, selected ? tabSelectedStyle : tabStyle);
  91                         title.setLayoutData(CmsUiUtils.fillWidth());
  92                         title.addSelectionListener((Selected) (e) -> showTab(tabIndex(section.getNode())));
  93                         Node node = section.getNode();
  94                         title.setText(Jcr.getTitle(node));
  95                         if (!singleTab) {
  96                                 ToolBar toolBar = new ToolBar(sectionHeader, SWT.NONE);
  97                                 ToolItem closeItem = new ToolItem(toolBar, SWT.FLAT);
  98                                 if (closeIcon != null)
  99                                         closeItem.setImage(closeIcon);
 100                                 else
 101                                         closeItem.setText("X");
 102                                 CmsUiUtils.style(closeItem, selected ? tabSelectedStyle : tabStyle);
 103                                 closeItem.addSelectionListener((Selected) (e) -> closeTab(section));
 104                         }
 105                 }
 106
 107         }
 108
 109         public void view(CmsUiProvider uiProvider, Node context) {
 110                 if (body.isDisposed())
 111                         return;
 112                 int index = tabIndex(context);
 113                 if (index >= 0) {
 114                         showTab(index);
 115                         previousNode = context;
 116                         previousUiProvider = uiProvider;
 117                         return;
 118                 }
 119                 Section section = (Section) body.getChildren()[0];
 120                 previousNode = section.getNode();
 121                 if (previousNode == null) {// empty state
 122                         previousNode = context;
 123                         previousUiProvider = uiProvider;
 124                 } else {
 125                         previousUiProvider = currentUiProvider;
 126                 }
 127                 currentUiProvider = uiProvider;
 128                 section.setNode(context);
 129                 // section.setLayoutData(CmsUiUtils.coverAll());
 130                 build(section, uiProvider, context);
 131                 if (sections.size() == 0)
 132                         sections.add(section);
 133                 refreshTabHeaders();
 134                 index = tabIndex(context);
 135                 showTab(index);
 136                 layout(true, true);
 137         }
 138
 139         public void open(CmsUiProvider uiProvider, Node context) {
 140                 if (singleTab)
 141                         throw new UnsupportedOperationException("Open is not supported in single tab mode.");
 142
 143                 if (previousNode != null && Jcr.getIdentifier(previousNode).equals(Jcr.getIdentifier(context))) {
 144                         // does nothing
 145                         return;
 146                 }
 147                 if (sections.size() == 0)
 148                         CmsUiUtils.clear(body);
 149                 Section currentSection = getCurrentSection();
 150                 int currentIndex = sections.indexOf(currentSection);
 151                 Section previousSection = new Section(body, SWT.NONE, context);
 152                 build(previousSection, previousUiProvider, previousNode);
 153                 // previousSection.setLayoutData(CmsUiUtils.coverAll());
 154                 int index = currentIndex + 1;
 155                 sections.add(index, previousSection);
 156                 showTab(index);
 157                 refreshTabHeaders();
 158                 layout(true, true);
 159         }
 160
 161         public void showTab(int index) {
 162                 Section sectionToShow = sections.get(index);
 163                 // sectionToShow.moveAbove(null);
 164                 stackLayout.topControl = sectionToShow;
 165                 refreshTabHeaders();
 166                 layout(true, true);
 167         }
 168
 169         protected void build(Section section, CmsUiProvider uiProvider, Node context) {
 170                 for (Control child : section.getChildren())
 171                         child.dispose();
 172                 CmsUiUtils.style(section, bodyStyle);
 173                 section.setNode(context);
 174                 uiProvider.createUiPart(section, context);
 175
 176         }
 177
 178         private int tabIndex(Node node) {
 179                 for (int i = 0; i < sections.size(); i++) {
 180                         Section section = sections.get(i);
 181                         if (Jcr.getIdentifier(section.getNode()).equals(Jcr.getIdentifier(node)))
 182                                 return i;
 183                 }
 184                 return -1;
 185         }
 186
 187         public void closeTab(Section section) {
 188                 int currentIndex = sections.indexOf(section);
 189                 int nextIndex = currentIndex == 0 ? 0 : currentIndex - 1;
 190                 sections.remove(section);
 191                 section.dispose();
 192                 if (sections.size() == 0) {
 193                         emptyState();
 194                         refreshTabHeaders();
 195                         layout(true, true);
 196                         return;
 197                 }
 198                 refreshTabHeaders();
 199                 showTab(nextIndex);
 200         }
 201
 202         protected void emptyState() {
 203                 new Section(body, SWT.NONE, null);
 204                 refreshTabHeaders();
 205         }
 206
 207         public Composite getCurrent() {
 208                 return getCurrentSection();
 209         }
 210
 211         protected Section getCurrentSection() {
 212                 return (Section) stackLayout.topControl;
 213         }
 214
 215         public void setTabStyle(String tabStyle) {
 216                 this.tabStyle = tabStyle;
 217         }
 218
 219         public void setTabSelectedStyle(String tabSelectedStyle) {
 220                 this.tabSelectedStyle = tabSelectedStyle;
 221         }
 222
 223         public void setBodyStyle(String bodyStyle) {
 224                 this.bodyStyle = bodyStyle;
 225         }
 226
 227         public void setCloseIcon(Image closeIcon) {
 228                 this.closeIcon = closeIcon;
 229         }
 230
 231         public void setSingleTab(boolean singleTab) {
 232                 this.singleTab = singleTab;
 233         }
 234
 235 }