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flightgear/utils/fgqcanvas/localprop.h
James Turner 8472f8c6d0 Fix positional ordering of remote-canvas elements.
The mirror protocol now sends the position for internal as well as
leaf nodes, and the group uses this data to sort when no explicit
Z-indices exist. This gets the extra-500 much closer to working!
2017-01-26 23:14:48 +00:00

126 lines
2.8 KiB
C++

#ifndef LOCALPROP_H
#define LOCALPROP_H
#include <QByteArray>
#include <QVariant>
#include <QVector>
#include <QObject>
struct NameIndexTuple
{
QByteArray name;
unsigned int index = 0;
NameIndexTuple(const char* nm, unsigned int idx) :
name(nm),
index(idx)
{}
NameIndexTuple(const QByteArray& bytes) :
name(bytes)
{
Q_ASSERT(bytes.indexOf('/') == -1);
if (bytes.endsWith(']')) {
int leftBracket = bytes.indexOf('[');
index = bytes.mid(leftBracket + 1, bytes.length() - (leftBracket + 2)).toInt();
name = bytes.left(leftBracket);
}
}
QByteArray toString() const
{
QByteArray p = name;
if (index > 0) {
p += '[' + QByteArray::number(index) + ']';
}
return p;
}
bool operator==(const NameIndexTuple& other) const
{
return (name == other.name) && (index == other.index);
}
bool operator<(const NameIndexTuple& other) const
{
if (name == other.name) {
return index < other.index;
}
return name < other.name;
}
};
class LocalProp : public QObject
{
Q_OBJECT
public:
LocalProp(LocalProp* parent, const NameIndexTuple& ni);
virtual ~LocalProp();
void processChange(QJsonValue newValue);
const NameIndexTuple& id() const;
QByteArray path() const;
LocalProp* getOrCreateWithPath(const QByteArray& path);
LocalProp* childWithNameAndIndex(const NameIndexTuple& ni) const;
LocalProp* getOrCreateChildWithNameAndIndex(const NameIndexTuple& ni);
LocalProp* getOrCreateWithPath(const char* name);
LocalProp* getWithPath(const QByteArray& path) const;
LocalProp* getWithPath(const char* name) const;
QByteArray name() const;
unsigned int index() const;
/// position in the main FG propery tree. Normally
/// irrelevant but unfortunately necessary for correct
/// z-ordering of Canvas elements
unsigned int position() const
{
return _position;
}
void setPosition(unsigned int pos);
LocalProp* parent() const;
std::vector<LocalProp*> children() const
{ return _children; }
std::vector<QVariant> valuesOfChildren(const char* name) const;
std::vector<LocalProp*> childrenWithName(const char* name) const;
QVariant value() const;
QVariant value(const char* path, QVariant defaultValue) const;
void removeChild(LocalProp* prop);
bool hasChild(const char* name) const;
void changeValue(const char* path, QVariant value);
signals:
void valueChanged(QVariant val);
void childAdded(LocalProp* child);
void childRemoved(LocalProp* child);
private:
const NameIndexTuple _id;
const LocalProp* _parent;
std::vector<LocalProp*> _children;
QVariant _value;
unsigned int _position = 0;
};
#endif // LOCALPROP_H