Nightmare1
@Nightmare1
Программист

Какой функцией можно убрать задний фон объекта отображения?

Есть код.
spoiler

import sys
from PyQt5 import QtGui, QtCore, uic
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QMainWindow, QApplication
import random as r
import threading, time
from PyQt5.QtCore import pyqtSlot
from hotkeys import bind_hotkey_function
from PyQt5 import QtOpenGL

import OpenGL.GL as GL        # python wrapping of OpenGL
from OpenGL import GLU        # OpenGL Utility Library, extends OpenGL functionality

class GLWidget(QtOpenGL.QGLWidget):
    def __init__(self, parent=None):
        self.parent = parent
        QtOpenGL.QGLWidget.__init__(self, parent)
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground, True)

    def initializeGL(self):
        # GL.glEnable(GL.GL_ALPHA_TEST)    
        # GL.glEnable(GL.GL_DEPTH_TEST)  
        # GL.glEnable(GL.GL_COLOR_MATERIAL)
        # GL.glEnable(GL.GL_LIGHTING)       
        # GL.glEnable(GL.GL_LIGHT0)      
        # GL.glEnable(GL.GL_BLEND)      
        # GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
        self.qglClearColor(QtCore.QColor(0, 0, 255, 0))
        GL.glClearColor(0, 0, 255, 0)

    def resizeGL(self, w, h):
        GL.glViewport(0, 0, w, h)
        GL.glMatrixMode(GL.GL_PROJECTION)
        GL.glLoadIdentity()
        x = float(w) / h
        GL.glFrustum(-x, x, -1.0, 1.0, 1.0, 10.0)
        GL.glMatrixMode(GL.GL_MODELVIEW)
        GL.glLoadIdentity()

    def paintGL(self):
        GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)   


        GL.glPushMatrix()

        GL.glBegin(GL.GL_TRIANGLES)
        GL.glColor3f(1.0, 0.0, 0.0, 0)
        GL.glVertex3f(-1.0, 1.0, -3.0, 0)
        GL.glColor3f(0.0, 1.0, 0.0, 0)
        GL.glVertex3f(1.0, 1.0, -3.0, 0)
        GL.glColor3f(0.0, 0.0, 1.0, 0)
        GL.glVertex3f(0.0, -1.0, -3.0, 0)
        GL.glEnd()

        GL.glPopMatrix()
        GL.glFlush()


class MainWindow(QMainWindow):

    def __init__(self, screen_size):
        QMainWindow.__init__(self)

        self.setWindowFlags(
            QtCore.Qt.WindowStaysOnTopHint |
            QtCore.Qt.FramelessWindowHint |
            QtCore.Qt.X11BypassWindowManagerHint
            #| QtCore.Qt.WindowTransparentForInput
        )
        self.size = size  + QtCore.QSize(220, 32)
        self.setGeometry(
            QtWidgets.QStyle.alignedRect(
                QtCore.Qt.LeftToRight, QtCore.Qt.AlignCenter,
                self.size,
                QtWidgets.qApp.desktop().availableGeometry()
        ))
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground, True)
        self.updater = True
        def update_widget():
            pass
            #while self.updater:
            #    time.sleep(.1)
            #    self.update()
        self.update_thread = threading.Thread(target=update_widget)
        self.update_thread.start()
        self.exit_hotkey = bind_hotkey_function("Ctrl-M", self.close_shortcut_trigger)
        from audio_noise import audio_noise_thread_executor
        self.audio_noise_thread = audio_noise_thread_executor()

        glWidget = GLWidget(self)
        self.setCentralWidget(glWidget)

    def mousePressEvent(self, event):
        QtWidgets.qApp.quit()
        self.updater = False
        self.audio_noise_thread.data['do'] = False
        self.exit_hotkey.data['do'] = False

    def paintEvent(self, event):
        try:
            width, height = r.randint(20, 70), r.randint(20, 70)
            qp = QtGui.QPainter(self) 

            for i in range(int(self.size.width() / width)):
                for j in range(int(self.size.height() / height) + 1):
                    qp.setBrush(QtGui.QColor(r.randint(0, 255),r.randint(0, 255),r.randint(0, 255), 40))    
                    if r.randint(0, 1) == 1:
                        qp.drawRect(i*width, j*height, width, height)
                    else:
                        qp.drawEllipse(i*width, j*height, width, height)

            # for i in range(self.size.width()):
            #     for j in range(self.size.height()):
            #         pen = QtGui.QPen()
            #         pen.setWidth(5)
            #         pen.setColor(QtGui.QColor(r.randint(0, 255),r.randint(0, 255),r.randint(0, 255), 40))
            #         qp.setPen(pen)
            #         qp.setRenderHint(QtGui.QPainter.Antialiasing, True)
            #         qp.drawPoint(i, j)
            #         print(i, j)
        except Exception as e:
            print(e)

    def close_shortcut_trigger(self):
        print("CLOSE WINDOW!")
        self.app.quit()

    def gen_image_object(self):
        pass



if __name__ == '__main__':

    app = QApplication(sys.argv)
    screen = app.primaryScreen()
    print('Screen: %s' % screen.name())
    size = screen.size()
    print('Size: %d x %d' % (size.width(), size.height()))
    rect = screen.availableGeometry()
    print('Available: %d x %d' % (rect.width(), rect.height()))
    mywindow = MainWindow(size)
    mywindow.app = app
    mywindow.show()

    sys.exit(app.exec())

Отображает.
6269395e00367827323040.png

Но чёрный фон нужно исключить.

nightmare@nightmare-desktop:~$ screenfetch
                          ./+o+-       nightmare@nightmare-desktop
                  yyyyy- -yyyyyy+      OS: Ubuntu 20.04 focal
               ://+//////-yyyyyyo      Kernel: x86_64 Linux 5.13.0-40-generic
           .++ .:/++++++/-.+sss/`      Uptime: 42m
         .:++o:  /++++++++/:--:/-      Packages: 2305
        o:+o+:++.`..```.-/oo+++++/     Shell: bash 5.0.17
       .:+o:+o/.          `+sssoo+/    Resolution: 1600x900
  .++/+:+oo+o:`             /sssooo.   DE: GNOME 3.36.5
 /+++//+:`oo+o               /::--:.   WM: Mutter
 \+/+o+++`o++o               ++////.   WM Theme: Adwaita
  .++.o+++oo+:`             /dddhhh.   GTK Theme: Yaru [GTK2/3]
       .+.o+oo:.          `oddhhhh+    Icon Theme: Yaru
        \+.++o+o``-````.:ohdhhhhh+     Font: Ubuntu 11
         `:o+++ `ohhhhhhhhyo++os:      Disk: 515G / 3,7T (14%)
           .o:`.syhhhhhhh/.oo++o`      CPU: AMD A12-9800E RADEON R7, 12 COMPUTE CORES 4C+8G @ 4x 3,1GHz
               /osyyyyyyo++ooo+++/     GPU: AMD/ATI Wani [Radeon R5/R6/R7 Graphics]
                   ````` +oo+++o\:     RAM: 4082MiB / 6874MiB
                          `oo++.
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Ответы на вопрос 1
Zifix
@Zifix
Barbatum
А какой фон вам нужен? Прозрачное окно?
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