I guess you can use setItemDelegate method of the treeview to setup custom painter for your treeview items. In the delegate’s paint method you can use QTextDocument to load item’s text as html and render it. Please check if an example below would work for you: treeview initialization: … // create simple model for a … Read more
There are some rules that make life with signals and slots easier and cover the most common reason for defective connections. If I forgot something please tell me. 1) Check the debug console output: When execution errors occur, the debug output can show you the reason. 2) Use the full signature of signal and slot: … Read more
With Qt 5 and a C++11 compiler, the idiomatic way to do such things is to give a functor to connect: connect(action1, &QAction::triggered, this, [this]{ onStepIncreased(1); }); connect(action5, &QAction::triggered, this, [this]{ onStepIncreased(5); }); connect(action10, &QAction::triggered, this, [this]{ onStepIncreased(10); }); connect(action25, &QAction::triggered, this, [this]{ onStepIncreased(25); }); connect(action50, &QAction::triggered, this, [this]{ onStepIncreased(50); }); The third argument to … Read more
Widgets when they are visible for the first time call to be visible to their children, but since you are creating it afterwards they probably are not calling that method, a possible solution is to call the show method. void ChatWidget::displayChatAfterButtonPressed() { QLabel *lbl; lbl=new QLabel(this); lbl->setText(“Hello World 2”); lbl->show(); } comment: it seems strange … Read more
for TStatusBar, use QStatusBar for TListBox, use QListBox (Q3ListBox in Qt4) or QListWidget TStringGrid and TSpeedButton apparently have no equivalent. Use Qt demo software to see what Qt toolkit proposes and find what you are looking for. For other classes (not mentioned by OP): for TCheckBox, use QCheckBox for TRadioButton, use QRadioButton for TComboBox, use … Read more
Morty, Jethro, Fido etc. are not different “yoctos”, but different releases given the timeline of the project. Generally, pick the most current that is available, as it is the most actively maintained one. (At the current moment in time, Rocko is the stable release)
I have made a small changes its perfectly working void MainWindow::edgeImage() { image =cvLoadImage(FileName.toLocal8Bit().data()); Gray = cvCreateImage(cvSize(image->width,image->height),IPL_DEPTH_8U,1 ); cvCvtColor(image, Gray, CV_RGB2GRAY); canny= cvCreateImage(cvSize(image->width,image->height),IPL_DEPTH_8U,1 ); cvCanny(Gray,canny,50,150,3); QImage imgCanny = QImage((const unsigned char*)canny->imageData,canny->width,canny->height,QImage::Format_Indexed8); imgCanny.setPixel(0,0,qRgb(0,0,0)); ui->label_3->setPixmap(QPixmap::fromImage(imgCanny).scaled(ui->label_3->size())); }