qt4

问题 I have a GUI program that opens a Windows console in a separate window to display output and accept user input. My development environment is Qt 4.7.1 with mingw. The console works fine, until I try to run the program in Qt's debugger (gdb); then, although AllocConsole succeeds, and GetStdHandle appears to return a valid handle (0x000000d8), any attempt to use the handle causes Windows error 6 (invalid handle). So I can't debug my program. Which is a pain, because it has some serious bugs.

问题 I am trying to compile a Qt project that uses poppler library for pdf (linux). I put #include in the mainwindow.cpp I put poppler folder in my project folder besides mainwindow.cpp poppler-qt4.h is in poppler-0.16.7/qt4/src I do not need to recompile poppler, I just need to link the library through its headers but I do not know how to do. If compilation is necessary I can do it, but I tried ./configure and it said "./configure not found". I searched for other similar threads but they were not

问题 I've written a loop which adds some items to my QListWidget . Now I want them to have an icon from my qrc file. For this I would use a loop in which I add a unique icon to each item. void Test::Query() { ui->listWidget_Available->clear(); QString CmdList[4] = {"kcmshell4 --list|grep -q kcm_grub2", "kcmshell4 --list|grep -q kcm_networkmanagement", "which pastebunz", "[ -z $ink3_ver ]"}; QString NameList[4] = {"kcm_grub2", "kcm_networkmanagement", "pastebunz", "Shellmenu"}; QString IconList[4]

问题 I am using QTranslator in VS 2010. When using the process below I get an error saying the add-on has exited with an error (Exitcode 1). I have been through the whole process (code to executable with translations working) using Qt Linguist and Qt Creator. However, I cannot even create the ts file in Visual Studio (add on menus all where they should be). Anyone any ideas why please? Creating Qt Translation Files for the Project To add a new translation file to the project, select Qt|Create New

问题 I am trying to add some custom QGraphicsItems in a QGraphicsScene on mouse click and at mouse cursor coordinates. But the items are not added at the same coordinates as the mouse cursor's. renderArea::renderArea(QWidget *parent): QGraphicsView(parent) { scene = new QGraphicsScene(this); scene->setItemIndexMethod(QGraphicsScene::NoIndex); scene->setSceneRect(0, 0, 850, 480); setScene(scene); setCacheMode(CacheBackground); setViewportUpdateMode(BoundingRectViewportUpdate); setRenderHint

问题 I don't have a forever loop like this question, but it still doesn't emit the finished() signal, In the constructor of a class: connect (&thread, SIGNAL(started()), SLOT(threadFunc())); connect (&thread, SIGNAL(finished()), SLOT(finished())); In the finished() function, void XX::finished() { qDebug() << "Completed"; } void XX::threadFunc() { qDebug() << "Thread finished"; // only single line, finishes immediately } But I never see the finished() get called, everytime before I start the thread

问题 I am trying to create a Custom QGraphicsItem button as shown by Fred here. The code which he posted can be found here. The problem is when I try and compile the code I get the following two errors: /usr/include/qt4/QtGui/qgraphicsitem.h ‘QGraphicsItem::QGraphicsItem(const QGraphicsItem&)’ is private /usr/include/qt4/QtCore/qobject.h ‘QObject::QObject(const QObject&)’ is private Here is the code snippet which essentially is the same as that in the sample above. The error is on the class

问题 I have a simple application that uses one worker thread. This worker thread is started and initializes DownloadManager, which is responsible for downloading files from the net. In my main application class I have the finished() SIGNAL on the thread that is emitted before the DownloadManager finishes. My question is how to make the worker thread wait until the DownloadManager finishes its work. Here is example code : class Main { m_DownloadWorker = new DownloadWorker(this); QObject::connect(pm

问题 I'm trying to make a border for rows in QTableWidget with different ways, but all solutions don't respond my requirements. All that I want, is to draw a rectangle around a whole row . I had try QStyledItemDelegate class, but that is not my way, because delegates are used only for item[ row, column ], not for the whole rows or columns. Here is wrong solution: /// @brief Рисуем границу вокруг строки. class DrawBorderDelegate : public QStyledItemDelegate { public: DrawBorderDelegate( QObject*

问题 I'm using Qt 4.8.6. I have a QListWidget . When the user click on an Add button, a new item is inserted at the end of the list and edition of the item's text is initiated: void slot_add_item() { auto* item = new QListWidgetItem(QString()); item->setFlags(item->flags() | Qt::ItemIsEditable); listWidget->addItem(item); listWidget->setCurrentItem(item); listWidget->editItem(item); } Based on this comment, I'm listening to the commitData signal to catch when the user has finished editing the item