Debugger: Use primitive internal widget instead of matplotview

This practically removes any functionality beyond plain plot display,
but does that at least reliably, cross-platform, without dependency
on 3rd party python packages.

Change-Id: Iaff2f78595394522f32264c642df20dd48b83f8b
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/debugger/watchdata.h

@@ -37,6 +37,7 @@
 #include <QMetaType>
 
 #include <functional>
+#include <vector>
 
 namespace Debugger {
 namespace Internal {
@@ -113,6 +114,7 @@ public:
     QString         value;         // Displayed value
     QByteArray      editvalue;     // Displayed value
     DebuggerDisplay editformat;    // Format of displayed value
+    DebuggerEncoding editencoding; // Encoding of displayed value
     QByteArray      type;          // Type for further processing
     QString         displayedType; // Displayed type (optional)
     quint64         address;       // Displayed address of the actual object
@@ -134,6 +136,10 @@ void decodeArrayData(std::function<void(const WatchData &)> itemHandler,
                      const QByteArray &rawData,
                      int encoding);
 
+void readNumericVector(std::vector<double> *,
+                       const QByteArray &rawData,
+                       DebuggerEncoding encoding);
+
 void parseChildrenData(const WatchData &parent, const GdbMi &child,
                        std::function<void(const WatchData &)> itemHandler,
                        std::function<void(const WatchData &, const GdbMi &)> childHandler,