qlabel

I have a very small Qt application that uses labels to display a jpeg image without first putting it in a window. (I got a lot of help from Display QImage with QtGui ) Now I would like to change the alpha channel of this jpeg to make the image partially transparent. I have tried the following without any luck int main (int argc, char *argv[]) { QApplication app(argc, argv); QLabel label (0, Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint); label.resize(1280,720); label.setPixmap(QPixmap("test.jpg")); label.setScaledContents(true); // This line should set the alpha transparency to 50% label

I am trying to piece together PyQt5 based image viewer Python code from various sources and extend capability to crop regions of interest (ROI) within loaded images. The issue is that the mapped coordinates and mouse clicks consider scroll bar and menu bar when determining pixel locations. Following is the code that loads image and provide bounding box capability, but I cannot seem to draw/crop boxes accurately due to the offset. from PyQt5.QtCore import QDir, Qt from PyQt5.QtGui import QImage, QPainter, QPalette, QPixmap from PyQt5.QtWidgets import (QAction, QApplication, QFileDialog, QLabel,

Basically i'm making a simple calculator program to understand the basics of C++ GUI however I get an error message leading to the line of code I have in the void MainWindow::addx() to label -> setText(c); with an error message of: invalid user-defined conversion from 'int' to 'const QString&'[-fpermissive] I really don't know what that error message means I assume it means I cant display an integer on a label. I just wanted to know if I am able to display an integer on my label or do I have to use a different widget. class MainWindow() { int a, b, c; QLabel * label; ... }; void MainWindow:

I would like to handle a click to the link in this application of mine: When I click on the "Output File" link, I would like to be able to generate an action in my application. As of today, the link is described like this in the rich text QLabel: <a href="http://google.fr"><span style=" text-decoration: underline; color:#0000ff;">Output File"</span></a> (generated by Qt Designer) When clicked, it will open the default web browser to go to Google. That's not what I want; I'd like something like: <a href="#browse_output"><span style=" text-decoration: underline; color:#0000ff;">Output File"<

I'm writing a program that will allow me to upload photos to TUMBLR via their API, I've got the uploading working (thanks to you guys). I've put a 'queueBox' on the side of the GUI, which displays the image names, and they are stored in a QListWidget. I've put this in my Main Class' constructor: def __init__(self): QtGui.QMainWindow.__init__(self) self.setupUi(self) self.queueBox.itemClicked.connect(self.displayPhoto) and I have this method: def displayPhoto(self, item): tempName = (item.text()) print tempName self.myLabel.setPixmap(QtGui.QPixmap(_fromUtf8(directory + '\\' + tempName))) ##