General and Desktop

@stryga42 Thank you for your reply, what I want to do is on the Mac system, when I switch the desktop space, let the window switch with it and display it on the top layer forever. What I did try is as follows: // in .mm file, My own widget is subclass of QWidget NSPanel *window = [[NSPanel alloc] initWithContentRect:NSMakeRect(0, 0, size.width(), size.height()) styleMask:NSWindowStyleMaskFullSizeContentView | NSWindowStyleMaskBorderless | NSWindowStyleMaskNonactivatingPanel backing:NSBackingStoreBuffered defer:YES]; [window setHasShadow:false]; [window setHidesOnDeactivate:false]; [window setBackgroundColor:NSColor.clearColor]; [window setTitlebarAppearsTransparent:true]; [window setTitleVisibility:NSWindowTitleHidden]; [window setFloatingPanel:true]; [window setLevel:NSScreenSaverWindowLevel - zPosition]; [window setCollectionBehavior:NSWindowCollectionBehaviorCanJoinAllSpaces | NSWindowCollectionBehaviorFullScreenAuxiliary]; NSView *nativeWidgetView = (NSView*)(this->winId()); window.contentView = nativeWidgetView; This approach achieved my purpose, but it also caused a series of event distribution problems, such as not receiving QEvent::Enter...I don't know what to do and if there is any other way to do it?

@JonB Got it, let me try that. Thank you!

@Dummie1138 Good on the backslashes, but no you are going too far. The attempt you had is actually close. It would need to be "^\\S*$" But if that doesn't work the link I referenced says QRegExpValidator already assumes ^...$ around your expression, i.e. complete match. So your ^/$ may be being taken literally. Try just "\\S*" ?

@jsulm said in Scroll a pdf document in QPdfView: @Faust-Faust Since it inherits https://doc.qt.io/qt-6/qabstractscrollarea.html it is possible I knew, but he didn't give me the method. QScrollBar *scrol = view->verticalScrollBar(); scrol->setSliderPosition(scrol->sliderPosition() + 100); Thank you.

@stryga42 Ubuntu 22.04.2 LTS with the standard wayland WM. I am dragging within my app (I drag a treeItem from its location to another in the same treeview). The code itself is very basic and it works as expected on windows void ProjectWidget::dragMoveEvent(QDragMoveEvent * event) { QTreeWidgetItem* currentItem = itemAt(event->position().toPoint()); if (currentItem == NULL) { event->ignore(); return; } if (latestDraggedItem == NULL) { event->ignore(); return; } QVariant v = latestDraggedItem->data(0,Qt::UserRole); if (v.value<ModelTemplate *>()) { if (currentItem == cardNode) { event->setDropAction(Qt::MoveAction); event->accept(); return; } } event->ignore(); }

@UmeyrMSekban Usually I use only a standard connection string, try with this //Driver={SQL Server Native Client 11.0};Server=myServerAddress;Database=myDataBase;Uid=myUsername;Pwd=myPassword; m_database = QSqlDatabase::addDatabase("QODBC", connectionName); QString dns = QString("Driver={SQL Server Native Client 11.0};Server=%1;Database=%4;Uid=%2;Pwd=%3;") .arg(m_host,m_userName,m_password, m_nameDB); qDebug() << "ODBC connection string" << dns << "driver"; m_database.setDatabaseName(dns); stato = m_database.open(); if(!stato){ qCritical() << m_database.lastError().text() << QSqlDatabase::drivers(); }

@jorTry85 As @SGaist wrote: you need to use Microsoft compiler, not MinGW.

@Chris-Kawa Thanks for the pointer to the code. I'm new to Qt and still finding my way around.

@manykim said in Can I create a so file for CMAKE Project, using QT?: I do not reckon where i did wrong... Did the linker even find your my_hello library? Post the link related commands and output executed by the Makefile that CMake generated for you. make VERBOSE=1

How to solve the problem of inherits multi super classes In computer science texts this is called the "diamond problem". There are countless online discussions about it. It's not specifically a Qt problem, but a design paradigm challenge.

An intermediate class can also work, so moc isn't asked to deal with not having the QObject base first. class Intermediate : public QObject { Q_OBJECT signals: void mySignal(); }; class OtherClass {}; class derived : public OtherClass, public Intermediate { };

Thank you, the issue was solved by changing the stretch factors. It was enough to change listLayout->addWidget(button); to listLayout->addWidget(button,1,Qt::AlignTop); So the stretch factor ratio 1:0 allows to allign the button on the top of it's area.

You do realize that you are trying to reimplement the model/view paradigm rather than implementing a delegate that should paint three strings ?

A delegate does not handle tooltips, you should return them through the model for the Qt::ToolTipRole role.

@Christian-Ehrlicher said in How avoid memory leak with GUI programming: @TheEnigmist said in How avoid memory leak with GUI programming: VS points to p = p.scaled line that add every time 10k byte of data (50x50x4 bytes), and each time I create and detroy the widget where that QAbstractTableModel is I see in memory that all that Pixmap are never destroyed. There is no leak and can't be one - you should take a look into QPixmapCache and for the sake of performance and implicit sharing don't load the pixmap in your data() method every time. Yeah I just found out that I was really wrong with that :( I will fix it right now! So I can go over when see pixmap in my allocated memory due to QPixmapCache. Ofc is always better to improve my code and don't load so many times a pixmap! @Chris-Kawa said in How avoid memory leak with GUI programming: @TheEnigmist said in How avoid memory leak with GUI programming: So if I'm not wrong what is cached is not the file on disk, but its scaled version No. How would Qt know that it's the same pixmap? What's cached is the pixmap that you create from a file, and the path (with some additional info) becomes a key to look it up in the cache. I see, but why the debugger points me to the scaled() function when looking for the allocated memory istance?

@Robert-M this works on Linux. Rich text format has to be selected for html in qlabel. <?xml version="1.0" encoding="UTF-8"?> <ui version="4.0"> <class>MainWindow</class> <widget class="QMainWindow" name="MainWindow"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>935</width> <height>296</height> </rect> </property> <property name="windowTitle"> <string>DirtyPHP Obfuscator</string> </property> <property name="windowIcon"> <iconset> <normaloff>dirtyphp.ico</normaloff>dirtyphp.ico</iconset> </property> <widget class="QWidget" name="centralwidget"> <widget class="QPushButton" name="pushButton_command"> <property name="geometry"> <rect> <x>90</x> <y>10</y> <width>291</width> <height>31</height> </rect> </property> <property name="text"> <string>Construct command Ctrl+1</string> </property> <property name="shortcut"> <string>Ctrl+1</string> </property> </widget> <widget class="QLabel" name="label_1"> <property name="geometry"> <rect> <x>20</x> <y>10</y> <width>61</width> <height>19</height> </rect> </property> <property name="text"> <string><html><head/><body><p><span style=" font-weight:600;">Step 1:</span></p></body></html></string> </property> <property name="textFormat"> <enum>Qt::RichText</enum> </property> </widget> <widget class="QTextBrowser" name="command_text"> <property name="geometry"> <rect> <x>19</x> <y>80</y> <width>901</width> <height>101</height> </rect> </property> <property name="verticalScrollBarPolicy"> <enum>Qt::ScrollBarAsNeeded</enum> </property> <property name="horizontalScrollBarPolicy"> <enum>Qt::ScrollBarAlwaysOff</enum> </property> </widget> <widget class="QLabel" name="label_command"> <property name="geometry"> <rect> <x>20</x> <y>50</y> <width>1181</width> <height>21</height> </rect> </property> <property name="font"> <font> <weight>75</weight> <bold>true</bold> </font> </property> <property name="text"> <string>Command:</string> </property> </widget> <widget class="QPushButton" name="pushButton_obfuscate"> <property name="geometry"> <rect> <x>90</x> <y>200</y> <width>291</width> <height>31</height> </rect> </property> <property name="text"> <string>Obfuscate application Ctrl+2</string> </property> <property name="shortcut"> <string>Ctrl+2</string> </property> </widget> <widget class="QLabel" name="label_2"> <property name="geometry"> <rect> <x>20</x> <y>200</y> <width>61</width> <height>19</height> </rect> </property> <property name="text"> <string><html><head/><body><p><span style=" font-weight:600;">Step 2:</span></p></body></html></string> </property> <property name="textFormat"> <enum>Qt::RichText</enum> </property> </widget> </widget> <widget class="QMenuBar" name="menubar"> <property name="geometry"> <rect> <x>0</x> <y>0</y> <width>935</width> <height>22</height> </rect> </property> <widget class="QMenu" name="menu_File"> <property name="title"> <string>&File</string> </property> <addaction name="actionChoose_application"/> <addaction name="actionChoose_recent_application"/> <addaction name="separator"/> <addaction name="actionChoose_composer_s_vendor_folder"/> <addaction name="actionChoose_framework"/> <addaction name="actionChoose_3rd_party_libraries_folders"/> <addaction name="separator"/> <addaction name="actionEdit_configuration_file"/> <addaction name="separator"/> <addaction name="actionExit"/> </widget> <widget class="QMenu" name="menu_Obfuscation"> <property name="title"> <string>&Obfuscation</string> </property> <addaction name="actionChoose_subdirectories_to_obfuscate"/> <addaction name="actionChoose_MVC_folders"/> <addaction name="actionChoose_result_folder"/> <addaction name="actionSet_other_options"/> <addaction name="separator"/> <addaction name="actionObfuscate_application"/> <addaction name="actionView_last_obfuscation_result"/> <addaction name="separator"/> <addaction name="actionClear_cache"/> </widget> <widget class="QMenu" name="menu_Help"> <property name="title"> <string>&Help</string> </property> <addaction name="actionBeginner_mode"/> <addaction name="actionAdvanced_mode"/> <addaction name="separator"/> <addaction name="actionDocumentation"/> <addaction name="actionWeb_page"/> <addaction name="actionReport_bug"/> <addaction name="actionSuggest_improvement"/> <addaction name="separator"/> <addaction name="action_About_program"/> </widget> <addaction name="menu_File"/> <addaction name="menu_Obfuscation"/> <addaction name="menu_Help"/> </widget> <widget class="QStatusBar" name="statusbar"/> <action name="actionChoose_application"> <property name="text"> <string>Choose &application...</string> </property> </action> <action name="actionChoose_composer_s_vendor_folder"> <property name="text"> <string>Choose Composer's &vendor folder...</string> </property> </action> <action name="actionChoose_framework"> <property name="text"> <string>Choose &framework...</string> </property> </action> <action name="actionChoose_3rd_party_libraries_folders"> <property name="text"> <string>Choose 3rd party &libraries folders...</string> </property> </action> <action name="actionEdit_configuration_file"> <property name="text"> <string>Edit frameworks &configuration file</string> </property> </action> <action name="actionChoose_subdirectories_to_obfuscate"> <property name="text"> <string>Choose &subdirectories to obfuscate...</string> </property> </action> <action name="actionChoose_result_folder"> <property name="text"> <string>Choose &result folder...</string> </property> </action> <action name="actionSet_other_options"> <property name="text"> <string>Set other op&tions...</string> </property> </action> <action name="actionObfuscate_application"> <property name="text"> <string>&Obfuscate application...</string> </property> </action> <action name="actionExit"> <property name="text"> <string>E&xit</string> </property> </action> <action name="actionDocumentation"> <property name="text"> <string>&Documentation</string> </property> </action> <action name="actionReport_bug"> <property name="text"> <string>&Report bug</string> </property> </action> <action name="action_About_program"> <property name="text"> <string>Abou&t DirtyPHP Obfuscator...</string> </property> </action> <action name="actionChoose_MVC_folders"> <property name="text"> <string>Choose &MVC folders...</string> </property> </action> <action name="actionWeb_page"> <property name="text"> <string>&WWW page</string> </property> </action> <action name="actionBeginner_mode"> <property name="checkable"> <bool>true</bool> </property> <property name="checked"> <bool>true</bool> </property> <property name="text"> <string>&Beginner's mode</string> </property> </action> <action name="actionAdvanced_mode"> <property name="checkable"> <bool>true</bool> </property> <property name="text"> <string>&Advanced mode</string> </property> </action> <action name="actionChoose_recent_application"> <property name="text"> <string>Choose &recent application...</string> </property> </action> <action name="actionView_last_obfuscation_result"> <property name="enabled"> <bool>false</bool> </property> <property name="text"> <string>&View last obfuscation result...</string> </property> </action> <action name="actionClear_cache"> <property name="text"> <string>&Clear cache</string> </property> </action> <action name="actionSuggest_improvement"> <property name="text"> <string>Suggest improvement</string> </property> </action> </widget> <resources/> <connections/> </ui>

@JonB nice solution. Is std::vector<uint8_t> c( bytes.begin(), bytes.end() ) more C++ style-ish?;

JonB is completely right. You initialize the QByteArray with "numerical garbage" and so the de-serialization fails. Details: If you initialize QByteArray with a const char * you will get the ASCII codes as values. A "0" will thus yield a value of 48, which is definitely not a valid enum TLV_TYPE. And even if it would be a numerical zero, it would decode to TLV_TYPE::UNDEFINED, which doesn't sound reasonable. Please use data which was generated from a serialization.