qt5

问题 I'm new to Qt and I'm trying to figure out a way to auto-resize in Qt. The goal is for the user to be able to drag the window to make it bigger and everything resizes to the size of the window. Does anyone have any tips? 来源： https://stackoverflow.com/questions/25571298/how-to-enable-resizing-of-a-window-in-qt

问题 This question has been asked multiple times in different ways. My question is specific to OpenGL 2.0 / GLSL 1.10 and higher and potential compatibility with OpenGL ES 2.0 and its supported version of GLSL: What are recommended C/C++ APIs used to combine multiple files into one shader source to pass into glShaderSource. For example, if I have 3 files A.frag, B.frag, C.frag that have the following contents: /* A.frag */ struct A { vec3 val; }; /* B.frag */ struct B { vec3 val; }; /* C.frag */

问题 This question has been asked multiple times in different ways. My question is specific to OpenGL 2.0 / GLSL 1.10 and higher and potential compatibility with OpenGL ES 2.0 and its supported version of GLSL: What are recommended C/C++ APIs used to combine multiple files into one shader source to pass into glShaderSource. For example, if I have 3 files A.frag, B.frag, C.frag that have the following contents: /* A.frag */ struct A { vec3 val; }; /* B.frag */ struct B { vec3 val; }; /* C.frag */

问题 Precompiled Qt 5.3.1 with dynamic libraries, MinGW 32, Windows 8.1 x64 The deployed application cannot start on another computer giving the error: Could not find or load the Qt platform plugin "windows" 回答1: Solved by copying DLL from Qt's folder to ../MyApp/platforms/qwindows.dll. Note: there is no "plugins" directory in path 来源： https://stackoverflow.com/questions/25012347/qt-5-3-1-application-error-could-not-find-or-load-the-qt-platform-plugin-windo

问题 I migrated a project from Qt4 to Qt5, and it compiles and everything but the application crashes before it even reaches the main function. I know there is a null value that fucks up something at some point, maybe a file that cant find or something, but there are so many .cpps and .h and libraries that its pretty hard to locate the source of the error plus I cant set any breakpoints. I have a lot of debugging data so maybe any of you can guide me in the right direction. I dont know what I

问题 As the title says I want to create an object of class Note and add its pointer to a list of the object of class Traymenu. I am missing the whole thing I guess, please take a look on how I call the Note's constructor in traymenus's newNote and what I am doing in note.h. traymenu.h: #ifndef TRAYMENU_H #define TRAYMENU_H #include <QSystemTrayIcon> #include <QIcon> #include <QPixmap> #include <QMenu> //in use for context menu #include <QList> #include "note.h" class Traymenu : public

问题 I got a external library, which includes a derived class from QGLWidget, very similar to that one here. In that library I have a class: class PictureGLWidget : public QGLWidget { //.. } This extends Qt's native QGLWidget and personalizes it. But it was not written by me, I just got it, via a *.dll. So then, I bind that Widget manually in my code to a layout like: QGridLayout* layout = new QGridLayout; layout->addWidget(myPictureGLWidget, 0, 1); ui->verticalLayout_5->addLayout(layout); since I

问题 In my Qt5 application, I am receiving a log message at run time from Qt itself that looks like this: QObject::connect: Cannot queue arguments of type 'QHostAddress' I know how to fix the cause of this message using Q_DECLARE_METATYPE(QHostAddress) macro or qRegisterMetaType<QHostAddress>("QHostAddress") class, that is not what this question is about. What I want to know is, how can I pin-point the exact location of the call in my code that triggered this message ? Since the message does not

问题 Each time I dynamically add a button to the mainToolBar of a QMainWindow, the QDockWidget resizes to its original size. My question: Can I prevent the QDockWidget from auto resizing and how do I do this? If I cannot do that what other options are open to me? 'resizeDocks' perhaps? This is an illustration of my dilemma. This is a sample app on startup: Now I manually resize the QDockWindow. Now I press 'F1' which creates a toolbutton on QMainWindow's mainToolBar and the QDockWindow auto

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 months ago . `I retrieved the position of the mouse cursor and I want to draw a line by paintevent but is not called by update so nothing is happening .cpp void MainWindow::mousePressEvent(QMouseEvent * event) { if(event->button() == Qt::LeftButton) { if(mFirstClick) { mStartX = event->x(); mStartY = event->y(); mFirstClick