Hi,
I try to hide all widgets in layout. But looks like findChildren doesn't
work for layout.
Here's my sample code:
QLayout * layout = widget -> findChild<QLayout *> (layoutName);
QList<QWidget *> list = layout -> findChildren<QWidget *> ();
cout << list.size() << endl;
size is 0, but inside this layout I have a fe...
Given the following code:
typedef struct IntElement
{
struct IntElement *next; // use struct IntElement
int data;
} IntElement;
typedef struct IntElement
{
IntElement *next; // Use IntElement
int data;
} IntElement; // why I can re-use IntElement here?
I use above data structure to define a linked-list...
I want to send an eject command to a specific USB device identified by it's VID and PID. I can find the device by using SetupDiEnumDeviceInfo() and SetupDiGetDeviceRegistryProperty() and matching the VID/PID numbers in the HARDWAREID string but that's as far as I've got.
I have a SP_DEVINFO_DATA struct and a HDEVINFO handle. How would I...
If in C++ I have a class longUnderstandableName. For that class I have a header file containing its method declaration. In the source file for the class, I have to write longUnderstandableName::MethodA, longUnderstandableName::MethodB and so on, everywhere.
Can I somehow make use of namespaces or something else so I can just write Metho...
For starters this is apart of my current homework assignment for my Data Structures class. I am not asking for answers, I am asking for help.
I have a stack class that is implementing a Linked List instead of an array. I am currently trying to write my pop() function. I have a node for my theBack part of the stack.
I am just confused a...
I want to create a class that is usable without being instanced, but that can also be instanced. Similar to a math class I suppose.
Thanks
...
Hi all. I've looked all over the place, but haven't found an answer to this.
I have a C++ class with these protected members:
struct tm _creationDate;
struct tm _expirationDate;
struct tm _lockDate;
I want to initialize them at instantiation time. If I put this in the constructor:
_creationDate = {0};
_expirationDate = {0}...
I currently can't use boost in a project and I've found myself missing boost::optional.
I've found this blog post which shows the idea behind boosts implementation. However, it doesn't take into account memory alignment issues and I'm not well versed enough in C++ to make the necessary changes. Does anyone know of an simple implement...
I have
typedef std::queue<MyObject*> InputQueue;
std::vector<InputQueue> inp_queue;
Now what I want to do is define at runtime say 5 queues and place data on those queues like
inp_queue[1].push(new MyObject());
etc.
I got it to compile, but it core dumps right away. I guess I need to actually add the queues to the vector first (...