Sync git svn branch with SVN repository r33144.

[simantics/platform.git] / bundles / org.simantics.browsing.ui.model / src / org / simantics / browsing / ui / model / tooltips / DescriptionTooltipRule.java

diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java
new file mode 100644 (file)
index 0000000..b581b4c
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/tooltips/DescriptionTooltipRule.java
@@ -0,0 +1,90 @@
+package org.simantics.browsing.ui.model.tooltips;\r
+\r
+import java.util.Map;\r
+\r
+import org.eclipse.swt.SWT;\r
+import org.eclipse.swt.graphics.FontMetrics;\r
+import org.eclipse.swt.graphics.GC;\r
+import org.eclipse.swt.layout.GridData;\r
+import org.eclipse.swt.layout.GridLayout;\r
+import org.eclipse.swt.widgets.Composite;\r
+import org.eclipse.swt.widgets.Text;\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.layer0.variable.Variable;\r
+import org.simantics.layer0.Layer0;\r
+\r
+public class DescriptionTooltipRule implements TooltipRule {\r
+    \r
+    public static final DescriptionTooltipRule INSTANCE = new DescriptionTooltipRule();\r
+    \r
+    public DescriptionTooltipRule() {\r
+    }\r
+\r
+    @Override\r
+    public Object createTooltip(Object event, Object parentComponent, NodeContext context, Map<Object, Object> auxiliary) {\r
+        Composite parent = (Composite)parentComponent;\r
+        Composite composite = new Composite(parent, SWT.NONE);\r
+        //ScrolledComposite composite = new ScrolledComposite(parent, SWT.NONE);\r
+        \r
+        composite.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));\r
+        GridLayout layout = new GridLayout(1, false);\r
+        composite.setLayout(layout);\r
+        Text text = new Text(composite, SWT.NONE | SWT.READ_ONLY | SWT.WRAP);\r
+        text.setBackground(parent.getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND));\r
+        \r
+        String toolTipContent = (String) auxiliary.get("content");\r
+        text.setText(toolTipContent);\r
+        \r
+        GC gc = new GC(text);\r
+        FontMetrics fm = gc.getFontMetrics();\r
+        int width = toolTipContent.length() * fm.getAverageCharWidth();\r
+        gc.dispose();\r
+        GridData gridData = new GridData();\r
+        if (width < 500)\r
+            gridData.widthHint = width;\r
+        else\r
+            gridData.widthHint = 500;\r
+        \r
+        text.setLayoutData(gridData);\r
+        \r
+        return composite;\r
+    }\r
+\r
+    @Override\r
+    public boolean isCompatible(Class<?> contentType) {\r
+        return (contentType == Resource.class || contentType == Variable.class);\r
+    }\r
+    \r
+    private static String getToolTipContent(ReadGraph graph, NodeContext nodeContext) throws DatabaseException {\r
+        Object input = nodeContext.getConstant(BuiltinKeys.INPUT);\r
+        String content = null;\r
+        if (input instanceof Variable) {\r
+            Variable var = (Variable) input;\r
+            Resource res = var.getPredicateResource(graph);\r
+            Layer0 L0 = Layer0.getInstance(graph);\r
+            String description = graph.getPossibleRelatedValue2(res, L0.HasDescription);\r
+            return description;\r
+        } else if (input instanceof Resource) {\r
+            Resource res = (Resource) input;\r
+\r
+            Layer0 L0 = Layer0.getInstance(graph);\r
+            String description = graph.getPossibleRelatedValue2(res, L0.HasDescription);\r
+            return description;\r
+        }\r
+        return content;\r
+    }\r
+\r
+    @Override\r
+    public boolean shouldCreateToolTip(ReadGraph graph  , NodeContext context, Map<Object, Object> auxiliary) throws DatabaseException {\r
+        String content = getToolTipContent(graph, context);\r
+        if (content == null || content.isEmpty())\r
+            return false;\r
+        auxiliary.put("content", content);\r
+        return true;\r
+    }\r
+\r
+}\r