QScopedPointer is a class from the Qt Toolkit which stores a pointer to a dynamically allocated object, and deletes it upon destruction.
Questions tagged [qscopedpointer]
18 questions
7
votes
3 answers
Create an instance of QScopedPointer later
For example here is my code
QScopedPointer timer2(new QTimer);
But I want to define
QScopedPointer timer2;
in mainwindow.h and create an instance
timer2(new QTimer);
in the mainwindow.cpp
How?
Mohammad Reza Ramezani
- 732
- 3
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6
votes
2 answers
Qt equivalent to boost::ptr_vector?
I need a pointer container that takes ownership of the pointers - i.e. when an element is removed, or the container goes out of scope, it frees all its pointers, like in boost::ptr_vector.
QList > doesn't work (compile…
sashoalm
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5
votes
1 answer
QList of QScopedPointers
I'm trying to store QScopedPointers in a QList.
I found this comment
One can also use QList >. – Kuba Ober Jan 14 '14 at 18:17
(first comment on this answer: https://stackoverflow.com/a/21120575/3095014)
and this post…
avb
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4
votes
1 answer
Understanding QScopedPointer passing by reference
I've been trying to understand how to pass this as a const reference.
I have the following class:
class DBContext : public QObject
In my class MainWindow I define it as folows:
private:
QScopedPointer dbContext;
How Storage class…
adviner
- 3,295
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4
votes
1 answer
unique_ptr and passing to connect
In my code
std::unique_ptr myNetworkAccessManager;
...
myNetworkAccessManager.reset(new QNetworkAccessManager(this));
QObject::connect(myNetworkAccessManager.get(), SIGNAL(finished(QNetworkReply *)), this,…
adviner
- 3,295
- 10
- 35
- 64
3
votes
0 answers
Is it possible to have a QList of QScopedPointer of some abstract class?
I want to have a QList or QVector in a class that it has a constant number of element type QScopedPointer< SomeAbstractClass >. I could easily use something like this:
QList…
e3oroush
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3
votes
1 answer
Pass QScopedPointer to function
How can I pass a QScopedPointer object to another function like that:
bool addChild(QScopedPointer content){
TreeNode* node = new TreeNode(content);
}
TreeNode:
TreeNode::TreeNode(QScopedPointer content)
{
…
yonutix
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- 51
2
votes
1 answer
QScopedPointer Vs boost::scoped_ptr [which one to choose]
If I had an option to choose between QScopedPointer and boost::scoped_ptr, which one would do most good in the following cases:
1. QScopedPointer Vs boost::scoped_ptr
2. QScopedPointer Vs…
Chenna V
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2
votes
0 answers
Qt: Debugger Crashes in qscopedpointer.h (application works though)
After recently converting my project over to make use Qt's opengl support (and thus using the Qt 5.4.0 MSVC2013 OpenGL 64bit Kit), I've been unable to properly debug because my application always 'crashes' at line 134 of qscopedpointer.h.
I can run…
Yattabyte
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2
votes
1 answer
C2248 - No access to private member when passing QScopedPointer to function
I´m getting the following error on this piece of code.
QScopedPointer onEvent(new NoteEvent(date, chan, pitch, vel, true));
QScopedPointer offEvent(new NoteEvent(date + dur, chan, pitch, vel,…
user2052244
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- 3
- 14
2
votes
3 answers
How to use QScopedPointer
I have an example that use
QApplication app(argc,argv);
QStandardItemModel* model = new QStandardItemModel(r,c,&app);
But in my program I have
QScopedPointer app(createApplication(argc, argv));
QStandardItemModel* model = new…
meolic
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- 2
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1
vote
1 answer
The use of sizeof in the implementation of QScopedPointer
To understand how Qt prevent incomplete type I went through the header file of qscopedpointer.h.The related part is as follows:
template
struct QScopedPointerDeleter
{
static inline void cleanup(T *pointer)
{
// Enforce…
Zhilei Han
- 13
- 4
1
vote
1 answer
QScopedPointer vs parent
I need some explanation about the next situation. Assume we have the next code:
class MyClass : public QObject
{
public:
MyClass(QObject* parent = nullptr)
{
m_member.reset(new QObject(this));
}
~MyClass(){} override;
…
Polina Bodnar
- 171
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1
vote
1 answer
QScopedPointer with signals and slots
as the tittle says, i could not find any relationship or how to pass them to signals and slots.
Anyone could give me a quick tutorial? or Introduction? :)
Alexander Baťka
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1
vote
2 answers
cannot convert 'QScopedPointer' to 'QStandardItem *'
I use this code without any error
QStandardItem *newRow;
newRow = new QStandardItem(hostname);
model2->setItem(index, 2, newRow);
I want to change the above code to the below:
QScopedPointer newRow(new…
Mohammad Reza Ramezani
- 732
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- 22