qt: add ReadableData

src/modules/interface/qt/data/ReadableData.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <QMetaType>
+#include <QString>
+
+#include <tc_readable.h>
+
+class ReadableData {
+private:
+    tc_readable_node_t *m_readableNode;
+public:
+    ReadableData(tc_readable_node_t *node) {m_readableNode = node;}
+    static QString mimeType() {return QString("tc-readable-data");}
+    bool isConstant() {return m_readableNode->constant;}
+    QString name() {return QString(m_readableNode->name);}
+    QString unit() {return QString(m_readableNode->unit);}
+    const tc_variant_t constData() {
+        if (!isConstant()) {
+            tc_variant_t retval;
+            retval.data_type = TC_TYPE_NONE;
+            return retval;
+        }
+        return m_readableNode->data;
+    }
+    
+    const tc_readable_result_t value() {
+        if (isConstant() || !m_readableNode->value_callback) {
+            return tc_readable_result_create(TC_TYPE_NONE, NULL, 0);
+        }
+        return m_readableNode->value_callback(m_readableNode);
+    }
+};