org.argeo.cms.swt/src/org/argeo/cms/swt/CmsSwtUtils.java

   1 package org.argeo.cms.swt;
   2
   3 import java.util.HashMap;
   4 import java.util.Map;
   5
   6 import org.argeo.api.cms.CmsStyle;
   7 import org.argeo.api.cms.CmsTheme;
   8 import org.argeo.api.cms.CmsView;
   9 import org.argeo.eclipse.ui.specific.EclipseUiSpecificUtils;
  10 import org.eclipse.swt.SWT;
  11 import org.eclipse.swt.events.SelectionListener;
  12 import org.eclipse.swt.layout.FormAttachment;
  13 import org.eclipse.swt.layout.FormData;
  14 import org.eclipse.swt.layout.GridData;
  15 import org.eclipse.swt.layout.GridLayout;
  16 import org.eclipse.swt.layout.RowData;
  17 import org.eclipse.swt.layout.RowLayout;
  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.Shell;
  23 import org.eclipse.swt.widgets.Text;
  24 import org.eclipse.swt.widgets.Widget;
  25
  26 /** SWT utilities. */
  27 public class CmsSwtUtils {
  28
  29         /** Singleton. */
  30         private CmsSwtUtils() {
  31         }
  32
  33         public static CmsTheme getCmsTheme(Composite parent) {
  34                 CmsTheme theme = (CmsTheme) parent.getData(CmsTheme.class.getName());
  35                 if (theme == null) {
  36                         // find parent shell
  37                         Shell topShell = parent.getShell();
  38                         while (topShell.getParent() != null)
  39                                 topShell = (Shell) topShell.getParent();
  40                         theme = (CmsTheme) topShell.getData(CmsTheme.class.getName());
  41                         parent.setData(CmsTheme.class.getName(), theme);
  42                 }
  43                 return theme;
  44         }
  45
  46         public static void registerCmsTheme(Shell shell, CmsTheme theme) {
  47                 // find parent shell
  48                 Shell topShell = shell;
  49                 while (topShell.getParent() != null)
  50                         topShell = (Shell) topShell.getParent();
  51                 // check if already set
  52                 if (topShell.getData(CmsTheme.class.getName()) != null) {
  53                         CmsTheme registeredTheme = (CmsTheme) topShell.getData(CmsTheme.class.getName());
  54                         throw new IllegalArgumentException(
  55                                         "Theme " + registeredTheme.getThemeId() + " already registered in this shell");
  56                 }
  57                 topShell.setData(CmsTheme.class.getName(), theme);
  58         }
  59
  60         public static CmsView getCmsView(Control parent) {
  61                 // find parent shell
  62                 Shell topShell = parent.getShell();
  63                 while (topShell.getParent() != null)
  64                         topShell = (Shell) topShell.getParent();
  65                 return (CmsView) topShell.getData(CmsView.class.getName());
  66         }
  67
  68         public static void registerCmsView(Shell shell, CmsView view) {
  69                 // find parent shell
  70                 Shell topShell = shell;
  71                 while (topShell.getParent() != null)
  72                         topShell = (Shell) topShell.getParent();
  73                 // check if already set
  74                 if (topShell.getData(CmsView.class.getName()) != null) {
  75                         CmsView registeredView = (CmsView) topShell.getData(CmsView.class.getName());
  76                         throw new IllegalArgumentException("Cms view " + registeredView + " already registered in this shell");
  77                 }
  78                 shell.setData(CmsView.class.getName(), view);
  79         }
  80
  81         /** Sends an event via {@link CmsView#sendEvent(String, Map)}. */
  82         public static void sendEventOnSelect(Control control, String topic, Map<String, Object> properties) {
  83                 SelectionListener listener = (Selected) (e) -> {
  84                         getCmsView(control.getParent()).sendEvent(topic, properties);
  85                 };
  86                 if (control instanceof Button) {
  87                         ((Button) control).addSelectionListener(listener);
  88                 } else
  89                         throw new UnsupportedOperationException("Control type " + control.getClass() + " is not supported.");
  90         }
  91
  92         /**
  93          * Convenience method to sends an event via
  94          * {@link CmsView#sendEvent(String, Map)}.
  95          */
  96         public static void sendEventOnSelect(Control control, String topic, String key, Object value) {
  97                 Map<String, Object> properties = new HashMap<>();
  98                 properties.put(key, value);
  99                 sendEventOnSelect(control, topic, properties);
 100         }
 101
 102         /*
 103          * GRID LAYOUT
 104          */
 105         public static GridLayout noSpaceGridLayout() {
 106                 return noSpaceGridLayout(new GridLayout());
 107         }
 108
 109         public static GridLayout noSpaceGridLayout(int columns) {
 110                 return noSpaceGridLayout(new GridLayout(columns, false));
 111         }
 112
 113         /** @return the same layout, with spaces removed. */
 114         public static GridLayout noSpaceGridLayout(GridLayout layout) {
 115                 layout.horizontalSpacing = 0;
 116                 layout.verticalSpacing = 0;
 117                 layout.marginWidth = 0;
 118                 layout.marginHeight = 0;
 119                 return layout;
 120         }
 121
 122         public static GridData fillAll() {
 123                 return new GridData(SWT.FILL, SWT.FILL, true, true);
 124         }
 125
 126         public static GridData fillWidth() {
 127                 return grabWidth(SWT.FILL, SWT.FILL);
 128         }
 129
 130         public static GridData grabWidth(int horizontalAlignment, int verticalAlignment) {
 131                 return new GridData(horizontalAlignment, horizontalAlignment, true, false);
 132         }
 133
 134         public static GridData fillHeight() {
 135                 return grabHeight(SWT.FILL, SWT.FILL);
 136         }
 137
 138         public static GridData grabHeight(int horizontalAlignment, int verticalAlignment) {
 139                 return new GridData(horizontalAlignment, horizontalAlignment, false, true);
 140         }
 141
 142         /*
 143          * ROW LAYOUT
 144          */
 145         /** @return the same layout, with margins removed. */
 146         public static RowLayout noMarginsRowLayout(RowLayout rowLayout) {
 147                 rowLayout.marginTop = 0;
 148                 rowLayout.marginBottom = 0;
 149                 rowLayout.marginLeft = 0;
 150                 rowLayout.marginRight = 0;
 151                 return rowLayout;
 152         }
 153
 154         public static RowLayout noMarginsRowLayout(int type) {
 155                 return noMarginsRowLayout(new RowLayout(type));
 156         }
 157
 158         public static RowData rowData16px() {
 159                 return new RowData(16, 16);
 160         }
 161
 162         /*
 163          * FORM LAYOUT
 164          */
 165         public static FormData coverAll() {
 166                 FormData fdLabel = new FormData();
 167                 fdLabel.top = new FormAttachment(0, 0);
 168                 fdLabel.left = new FormAttachment(0, 0);
 169                 fdLabel.right = new FormAttachment(100, 0);
 170                 fdLabel.bottom = new FormAttachment(100, 0);
 171                 return fdLabel;
 172         }
 173
 174         /*
 175          * STYLING
 176          */
 177
 178         /** Style widget */
 179         public static <T extends Widget> T style(T widget, String style) {
 180                 if (style == null)
 181                         return widget;// does nothing
 182                 EclipseUiSpecificUtils.setStyleData(widget, style);
 183                 if (widget instanceof Control) {
 184                         CmsView cmsView = getCmsView((Control) widget);
 185                         if (cmsView != null)
 186                                 cmsView.applyStyles(widget);
 187                 }
 188                 return widget;
 189         }
 190
 191         /** Style widget */
 192         public static <T extends Widget> T style(T widget, CmsStyle style) {
 193                 return style(widget, style.style());
 194         }
 195
 196         /** Enable markups on widget */
 197         public static <T extends Widget> T markup(T widget) {
 198                 EclipseUiSpecificUtils.setMarkupData(widget);
 199                 return widget;
 200         }
 201
 202         /** Disable markup validation. */
 203         public static <T extends Widget> T disableMarkupValidation(T widget) {
 204                 EclipseUiSpecificUtils.setMarkupValidationDisabledData(widget);
 205                 return widget;
 206         }
 207
 208         /**
 209          * Apply markup and set text on {@link Label}, {@link Button}, {@link Text}.
 210          *
 211          * @param widget the widget to style and to use in order to display text
 212          * @param txt    the object to display via its <code>toString()</code> method.
 213          *               This argument should not be null, but if it is null and
 214          *               assertions are disabled "<null>" is displayed instead; if
 215          *               assertions are enabled the call will fail.
 216          *
 217          * @see markup
 218          */
 219         public static <T extends Widget> T text(T widget, Object txt) {
 220                 assert txt != null;
 221                 String str = txt != null ? txt.toString() : "<null>";
 222                 markup(widget);
 223                 if (widget instanceof Label)
 224                         ((Label) widget).setText(str);
 225                 else if (widget instanceof Button)
 226                         ((Button) widget).setText(str);
 227                 else if (widget instanceof Text)
 228                         ((Text) widget).setText(str);
 229                 else
 230                         throw new IllegalArgumentException("Unsupported widget type " + widget.getClass());
 231                 return widget;
 232         }
 233
 234         /** A {@link Label} with markup activated. */
 235         public static Label lbl(Composite parent, Object txt) {
 236                 return text(new Label(parent, SWT.NONE), txt);
 237         }
 238
 239         /** A read-only {@link Text} whose content can be copy/pasted. */
 240         public static Text txt(Composite parent, Object txt) {
 241                 return text(new Text(parent, SWT.NONE), txt);
 242         }
 243
 244         /** Dispose all children of a Composite */
 245         public static void clear(Composite composite) {
 246                 if (composite.isDisposed())
 247                         return;
 248                 for (Control child : composite.getChildren())
 249                         child.dispose();
 250         }
 251 }