logo
down
shadow

The QPropertyAnimation is automatically deleted when using QParallelAnimationGroup?


The QPropertyAnimation is automatically deleted when using QParallelAnimationGroup?

By : Scott Rouse
Date : November 20 2020, 03:01 PM
I wish this helpful for you Based on the following code snippet, I have a doubt related to QPropertyAnimation and QParallelAnimationGroup: , Yes, both are destroyed.
code :
animation1->setProperty("nameObj", "animation1");
animation2->setProperty("nameObj", "animation2");
group->setProperty("nameObj", "group");

connect(animation1, SIGNAL(destroyed(QObject*)), this, SLOT(OnAnimationDestroyed(QObject*)));
connect(animation2, SIGNAL(destroyed(QObject*)), this, SLOT(OnAnimationDestroyed(QObject*)));
connect(group, SIGNAL(destroyed(QObject*)), this, SLOT(OnAnimationDestroyed(QObject*)));

group->start(QAbstractAnimation::DeleteWhenStopped);

void MyObj::OnAnimationDestroyed(QObject* obj)
{
    qDebug() << "Destroyed: " << obj->property("nameObj").toString();
}
Destroyed:  "group"

Destroyed:  "animation1"

Destroyed:  "animation2"


Share : facebook icon twitter icon
When parental record is deleted, are childrecord deleted automatically by accepts_nested_attributes_for?

When parental record is deleted, are childrecord deleted automatically by accepts_nested_attributes_for?


By : user2611452
Date : March 29 2020, 07:55 AM
hop of those help? Here is an example on Rails 3.2 api for accepts_nested_attributes_for: , No, you need to set the dependent key.
code :
has_many :pages, dependent: :destroy
PHP file getting deleted automatically

PHP file getting deleted automatically


By : Nick Porter
Date : March 29 2020, 07:55 AM
hope this fix your issue I am trying to upload this file to my server using cPanel and FTP and it gets deleted automatically. , The problem was with the symlink method
code :
 /**
     * Creates a symbolic link or copy a directory.
     *
     * @param string $originDir     The origin directory path
     * @param string $targetDir     The symbolic link name
     * @param bool   $copyOnWindows Whether to copy files if on Windows
     *
     * @throws IOException When symlink fails
     */
    public function symlink($originDir, $targetDir, $copyOnWindows = false)
    {
        if ('\\' === DIRECTORY_SEPARATOR) {
            $originDir = strtr($originDir, '/', '\\');
            $targetDir = strtr($targetDir, '/', '\\');

            if ($copyOnWindows) {
                $this->mirror($originDir, $targetDir);

                return;
            }
        }

        $this->mkdir(dirname($targetDir));

        $ok = false;
        if (is_link($targetDir)) {
            if (readlink($targetDir) != $originDir) {
                $this->remove($targetDir);
            } else {
                $ok = true;
            }
        }

        if (!$ok && true !== @symlink($originDir, $targetDir)) {
            $this->linkException($originDir, $targetDir, 'symbolic');
        }
    }
Files deleted or modified between git revisions are automatically getting deleted from instances

Files deleted or modified between git revisions are automatically getting deleted from instances


By : kumar
Date : March 29 2020, 07:55 AM
Does that help CodeDeploy is designed to deploy applications, not simply copy a specific and constantly different set of files.
As such, before deploying each 'revision', CodeDeploy will first cleanup any files deployed by the previous revision. Let me explain.
code :
File A
File B
File C
File A
File C
File A
File C
how to automatically set new id value as id of already deleted row

how to automatically set new id value as id of already deleted row


By : Alen
Date : March 29 2020, 07:55 AM
Hope that helps You can use MySQL's query variables to track the previous id and calculate the difference in the query, e,g.:
code :
SELECT id, id - @previous AS difference, @previous := id
FROM test, (SELECT @previous := 0) a
ORDER BY id;
SELECT (id - difference + 1) AS available_id
FROM (
 SELECT id, id - @previous AS difference, @previous := id
 FROM test, (SELECT @previous := 0) a
 ORDER BY id) b
WHERE b.difference > 1
LIMIT 1;
Qt object if created (newed) with 'this' needs to be deleted or automatically deleted?

Qt object if created (newed) with 'this' needs to be deleted or automatically deleted?


By : Samong Yang
Date : March 29 2020, 07:55 AM
This might help you If your object is parented to an object tree, it will be collected when the tree root object is destroyed. You can still delete it before that if you need to.
Related Posts Related Posts :
  • Find parent node function for binary tree
  • Rotate Binary Tree
  • Boost asio async_read_until stop reading on matched condition
  • How can I change the QGraphicView selected Item color
  • Understanding object slicing
  • How to change pointer so that it point to somewhere else?
  • Dynamically add overlay widgets
  • Compressing 3 number data in a byte
  • OpenGL - Uniform not being passed properly?
  • C++ Visual Studio "Non-standard syntax; use '&' to create a pointer to member"
  • Doxygen won't resolve reference to typedef in namespace
  • How to test for assert in debug build, but returned value in release?
  • use boost spirit parse int pair to vector
  • How #define works in Programming when define has value with operator?
  • C++: Passing objects by value to a member function of the same class
  • Confusion in C++ constructor
  • Implicit conversion operator doesn't kick in with operator overloading
  • From tuple of N elements to tuple of N/2 pairs
  • Operators Not Working With Class Objects?
  • GDAL Not Linking
  • C++ aligning characters to display neatly with any input implemented
  • c++, method to display content in hash table.Using double linked list
  • How to apply a function to a variadic argument list and cat them to a tuple
  • Doubly linked list c++ crashing after 3rd node
  • Transform a specific type of argument using templates
  • Function with recursion is causing stack overflow
  • working with multi-word typedefs
  • Calling std::to_string or std::to_wstring based on given typedef
  • Ensure a `std::vector` won't move its pointer
  • Appopriate Container that acts like normal static array?
  • Using enable_if to disable a template constructor of a template class
  • define implicit conversion from template class to primitive type based on other template
  • C++ class template, how to overload [ ] operator in a specific stuation?
  • What is the purpose of using an iterator in this function's return value?
  • C++ overriding the value of inherited static const variables
  • C++: what is special about punning character arrays according to the standard?
  • Producer consumer pthreads program not finishing
  • How do I start two thread teams with different thread functions at the same time?
  • OpenGL 3.3: GL_INVALID_OPERATION when calling glBindBuffer
  • Boost Karma generator for composition of classes
  • Can the storage of trivially copyable objects be safely reallocated with realloc?
  • Can I force a C++ class to be non-abstract?
  • Failing to specialize function for function pointer
  • Check if two (smart) pointers point to the same derived class
  • Getting an error when using delete[] cpp
  • recursion in variadic template function of different argument types
  • QTWidgets QTableWidget crash with segfault
  • clang and clang++ with ASAN generate different output
  • How to map BYTE array as FILE * on Windows
  • Logic Error With Function to Manipulate Linked List
  • Expected primary-expression before numeric constant
  • Pre-Decrement Operator
  • C++: how to input values separated by comma(,)
  • Correct way to write operator+ using rvalues
  • How to ignore whitespace and punctuation?
  • Prevent duplicated code on different data types (uint16_t/ uint32_t)
  • Writing Custom FPrintF
  • How to read from keyboard a complete random text, filter and cast
  • SIGSEGV when trying to change string in structure C/C++
  • c++: tuple with tag-type access
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org