qwidget

问题 I am trying to learn PyQt vector painting. Currently I am stuck in trying to pass information to paintEvent() method which I guess, should call other methods: I am trying to paint different numbers to a fundamental block (here drawFundBlock() method, which should draw some lines). The code is trying to check if right arrow is pressed-> drawFundamental block and if number is pressed (now trying to simply draw "5"), it will draw that number on a certain area on that fundamental block. But I can

问题 I am looking for a way to create a grid of graphs that can be dragged/dropped to rearrange the order. My first try was using QDockWidgets as they allow for drag/drop, however they were limited in a lot of other ways. Would it be possible to implement this function in a QGridLayout? For now I have a QGridLayout with 3x3 matplotlib widgets. Here is an example of the desired layout outcome. Sample code: import sys from PyQt5 import QtWidgets from matplotlib.figure import Figure from matplotlib

问题 My child widget does not get keyPressEvents, while if I put the same widget as top level window, it does. I try to set it get focus, but it has no effect on this. Code is below, showing what I try to get to work. #include <QApplication> #include <QKeyEvent> #include <QLCDNumber> #include <QLabel> #include <QVBoxLayout> class DigitSummer: public QLCDNumber { Q_OBJECT public: DigitSummer(QWidget *parent = nullptr) : QLCDNumber(parent) { } protected: void keyPressEvent(QKeyEvent *event) override

问题 My child widget does not get keyPressEvents, while if I put the same widget as top level window, it does. I try to set it get focus, but it has no effect on this. Code is below, showing what I try to get to work. #include <QApplication> #include <QKeyEvent> #include <QLCDNumber> #include <QLabel> #include <QVBoxLayout> class DigitSummer: public QLCDNumber { Q_OBJECT public: DigitSummer(QWidget *parent = nullptr) : QLCDNumber(parent) { } protected: void keyPressEvent(QKeyEvent *event) override

问题 I am working in Qt 4.7, and I have a QWidget object in my dialog. I need to go through each of the children and extract the current text into a QStringList. Every other object is a QCheckBox, and the rest are QComboBoxes (I would just need the text portion of both). So far the only way I could think of to do this would be to use the children() function to get them as QObject*'s and cast them, like this: QStringList textlist; for(int i = 0; i < ui->myWidget->children().size(); i++) { if(i % 2

问题 I am working in Qt 4.7, and I have a QWidget object in my dialog. I need to go through each of the children and extract the current text into a QStringList. Every other object is a QCheckBox, and the rest are QComboBoxes (I would just need the text portion of both). So far the only way I could think of to do this would be to use the children() function to get them as QObject*'s and cast them, like this: QStringList textlist; for(int i = 0; i < ui->myWidget->children().size(); i++) { if(i % 2

问题 I have Qt style sheet ( qss ) for QLineEdit , using different styles for readonly and editable. Works fine, but if I toggle a QLineEdit to readonly (at runtime) the style does not change. Is there a way to force a stylesheet update of such a line edit? As requested, the stylesheet: QLineEdit { background: transparent; border: 1px solid green; border-radius: 5px; } QLineEdit[readOnly="true"] { background: rgba(40,40,40); border: 1px solid rgba(50,50,50); } 回答1: After change edit's state try

问题 I spent some time struggling to use .setStyleSheet to change the background color of a QWidget used as a window, using Python 3.5.2, PyQt 5.9 and Qt 5.9.1. I tried various suggestions I found online, but what ended up working was changing the object name of the QWidget, referring afterwards to that name as an ID in the stylesheet. My question is, is this behaviour I can rely on, or is there an alternative way of doing it? Working code: #!/usr/bin/python3 import sys from PyQt5.QtWidgets import

问题 I spent some time struggling to use .setStyleSheet to change the background color of a QWidget used as a window, using Python 3.5.2, PyQt 5.9 and Qt 5.9.1. I tried various suggestions I found online, but what ended up working was changing the object name of the QWidget, referring afterwards to that name as an ID in the stylesheet. My question is, is this behaviour I can rely on, or is there an alternative way of doing it? Working code: #!/usr/bin/python3 import sys from PyQt5.QtWidgets import

问题 I need to create a QDialog with rounded translucent corners. The problem is when doing so, the corners are translucent, but are somehow filled in by the Window's alpha property making it black (which is my understanding of the cause of the problem) Clearly visible is the rounded edges, but with a black 'background' of sorts. To confirm, this Dialog is a modal dialog launched by a QThread from QMainWindow . It is not the parent window . The CSS for the QDialog (root) component is: QDialog {