system: ubuntu 18.04 QT version: 4.8.5 (due to arm runner requirements) first executed sudo . configure -prefix usr local Trolltech QtEmbedded-4.6.3-arm -shared -release -opensource -little-endian -embedded arm -no-qt3support -lrt -xplatform qws li...
[problem description] to develop a graphical interface using pyqt5, you need to display videos and pictures in the same place in the window, that is, to display a picture after the video is played. My idea is to build a widget, the widgt as the VedioOu...
as the title, in making a player, I want to bind different functions to two click events for my button, such as: the right button is the next song, and the left click is fast forward. ...
recently writing a player, now there are two window classes, one is QMainWindow class: SImplePlayer, is my video window; the other is playlist, QDialog class, I want to drag the video window, that is, my SimplePlayer window, my playlist can move, what s...
problem description < H2 > break it up ~ it would be nice to delete all the previous compilation results and recompile them. < H2 > Environment: qtcreator project references the cuda_runtime.h file, which is referenced in the cpp source file, and c...
problem description how to draw the dotted line Circle of QML Canvas The setLineDash method does not exist, so how do you draw it? will it take up too much to rotate if you use arc? effect is the broken circle ...
I now have a parent window that is QWidget, with a lot of QLabel controls in it. I want to achieve the edge shadow of QWidget. looks for various methods such as paintEventgraphics, etc., either have no effect, or the entire parent window QWidget become...
introduction to QT, entry to windows development. I want to use QT to achieve a function of simulating mouse clicks (Windows platform). Specifically, it goes like this: first get the handle of a specific name window, and then simulate clicking on a sp...
question: there is a requirement that if the input box is not currently focused, but the keyboard is pressed, the input will be automatically populated into the input box. my implementation is to listen to document.keydown, to determine keycode, and set...
I would like to ask the following, because it is a stand-alone version of PC software and there is no intermediate server, I want to build the function of sending email with smtp in the software to facilitate users to send feedback. There are the follow...
my project needs to display a large amount of data on the qt tree control, a total of four columns, the first column is the button and text, the second column is text, the third column is combobox, and the fourth column is icon. If all inserted, it will...
when I was packing, I configured a lot of things. prompt android-8.1.0 invalid; but I am too low with other versions ...
void MainWindow::fileCreateActionSlot() { QLineEdit *line_edit=new QLineEdit(); line_edit->setGeometry(50,50,80,80); line_edit->setText(""); QLabel my_label; my_label.setText(""); } ...
in order to make it easier to tell, I compressed the question. has an interface where the following start function executes when the start button is clicked, and you can see that as long as paused is false, it will continue to execute. Because I add...
A simple interface program that accepts username and password, slot function is temporarily empty, compilation can pass, runtime error. passwddialog.h -sharpifndef PASSWDDIALOG_H -sharpdefine PASSWDDIALOG_H -sharpinclude <QDialog> class QLabe...
QDateTime valid = QDateTime::fromString("2018-Apr-5", "yyyy-MMM-d"); use qDebug () output valid to directly say that it is invalid, what is this all about? It is not valid to use an example in the official document: QString s...
you need to code to achieve hard trigger, but the sample in pylon only finds software trigger examples. According to the above tips, you have implemented hardware trigger, but the actual test cannot be triggered. I know it is a code problem, but ther...
ask God, the effect shown in figure 3 at the front end, the number of data in the background is random, there may be up to 80 items, and there is also the ability to submit data. How to write the code? ...
< H2 > I deploy the flask application with nginx + gunicorn. < H2 > it is found that both nginx and gunicorn and flask work well, but they do not work together. mainly because nginx listens to the public network port 80 is normal, but cannot reverse ...
Linear table (A1 ~ (2),. , ai-1,ai,ai+1,. , an), uses a single linked list storage, the head pointer is H, each node stores an element in the linear table, and now looks for a node with an element value of x. Write the search statements for the followin...
@media only screen and (max-width: 310px) and (min-width: 300px) {html {font-size: 9px}} @media only screen and (max-width: 320px) and (min-width: 310px) {html {font-size: 9px} } @media only screen and (max-width: 360px) and (min-width: 320px) {html {fon...
after I install PyQt5, I can directly call Qt s control to write GUI. I just want to make sure. ...