I am trying to set a fixed height for QHBoxLayout. To elaborate more on that, I need to set a specific height for my Horizontal layout. However, I cannot find the proper way to do so. What should I do to make this happen?
hbox1 = QHBoxLayout()
As noted by #ekhumuro in QHBoxLayout you can not set the fixed height, you must do that to the widget where it will be contained as I show below:
import random
from PyQt5 import QtCore, QtGui, QtWidgets
class Widget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(Widget, self).__init__(parent)
self.setFixedHeight(300)
lay = QtWidgets.QHBoxLayout(self)
for letter in "ABCDEFG":
label = QtWidgets.QLabel(letter, alignment=QtCore.Qt.AlignCenter)
color = QtGui.QColor(*[random.randint(0, 255) for _ in range(3)])
label.setStyleSheet("background-color: {}".format(color.name()))
lay.addWidget(label)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
w = Widget()
w.show()
sys.exit(app.exec_())
Related
I'm new at PyQt, and I'm trying to create a main window containing two custom widgets, the first being a data grapher, the second being a QGridLayout containing QLabels. Problem is: the two widgets open in separate windows and have no content.
I've found multiple posts with a similar problem:
PyQt5 Custom Widget Opens in Another Window
Custom widget does not appear on Main Window
PyQt5 Custom Widget Opens in Another Window
And even a FAQ on this specific problem: https://www.pythonguis.com/faq/pyqt-widgets-appearing-as-separate-windows/
But I haven't been able to figure out why my code doesn't work. My aim is to obtain a result as shown below on the left, but instead I'm getting a result as shown on the right:
My code is the following (can be copied and run as it is):
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QLabel, QVBoxLayout, QWidget, QGridLayout
from PyQt5.QtGui import QFont
import sys
import pyqtgraph as pg
class CustomWidget_1(QWidget):
def __init__(self):
super(CustomWidget_1, self).__init__()
self.channels = [1, 2, 3, 4, 5, 6, 7, 8]
self.win = pg.GraphicsLayoutWidget(title='Plot', size=(800, 600))
self.plots = list()
self.curves = list()
for i in range(len(self.channels)):
p = self.win.addPlot(row=i, col=0)
p.showAxis('left', False)
p.setMenuEnabled('left', False)
p.showAxis('bottom', False)
p.setMenuEnabled('bottom', False)
self.plots.append(p)
curve = p.plot()
self.curves.append(curve)
self.win.show()
print('CustomWidget_1 initialized.')
class CustomWidget_2(QWidget):
def __init__(self, labelnames):
super(CustomWidget_2, self).__init__()
self.grid = QGridLayout()
self.labelnames = labelnames
self.qlabels = []
for label in self.labelnames:
labelBox = QLabel(label)
labelBox.setFont(QFont('Arial', 16))
labelBox.setStyleSheet('border: 2px solid black;')
labelBox.setAlignment(Qt.AlignCenter)
self.qlabels.append(labelBox)
index = self.labelnames.index(label)
q, r = divmod(index, 6)
self.grid.addWidget(labelBox, q, r)
print('CustomWidget_2 initialized.')
class MainWindow(QWidget):
def __init__(self):
super(MainWindow, self).__init__()
self.labelnames = ['label 1', 'label 2', 'label 3']
self.CustomWidget_1 = CustomWidget_1()
self.CustomWidget_1.setParent(self)
self.CustomWidget_1.show()
self.CustomWidget_2 = CustomWidget_2(self.labelnames)
self.CustomWidget_2.setParent(self)
self.CustomWidget_2.show()
self.mainLayout = QVBoxLayout()
self.mainLayout.addWidget(self.CustomWidget_1)
self.mainLayout.addWidget(self.CustomWidget_2)
self.setLayout(self.mainLayout)
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
predictVisualizer = MainWindow()
sys.exit(app.exec())
Could anyone tell me what I'm doing wrong and how I could fix it? Any pointers towards tutorials and/or templates would be greatly appreciated as well! Thanks!
you should write fewer lines of code and debug slowly, if you are new to pyqt5 you should read carefully the basic Layout creation, like you are creating a website interface, link: https://www.pythonguis.com/tutorials/pyqt-layouts/
This is the code I have edited, you can can refer:
import sys
from PyQt5.QtCore import QSize,Qt
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget,QGridLayout,QVBoxLayout,QLabel,QHBoxLayout
from PyQt5.QtGui import QPalette, QColor
class CustomWidget_1(QWidget):
def __init__(self,color):
super(CustomWidget_1, self).__init__()
self.setAutoFillBackground(True)
layout = QGridLayout()
self.setLayout(layout)
self.setFixedSize(QSize(400,300))
palette = self.palette()
palette.setColor(QPalette.Window, QColor(color))
self.setPalette(palette)
class CustomWidget_2(QWidget):
def __init__(self,color):
super(CustomWidget_2, self).__init__()
self.setAutoFillBackground(True)
layout = QHBoxLayout()
self.setLayout(layout)
self.setFixedSize(QSize(400,134))
layout.setContentsMargins(70,0,0,0)
palette = self.palette()
palette.setColor(QPalette.Window, QColor(color))
self.setPalette(palette)
Label1 = QLabel()
Label1.setText('abc')
Label2 = QLabel()
Label2.setText('sad')
Label3 = QLabel()
Label3.setText('qv')
layout.addWidget(Label1)
layout.addWidget(Label2)
layout.addWidget(Label3)
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.setWindowTitle("My App")
layout = QVBoxLayout()
layout.addWidget(CustomWidget_1("blue"))
layout.addWidget(CustomWidget_2("red"))
widget = QWidget()
widget.setLayout(layout)
self.setCentralWidget(widget)
app = QApplication(sys.argv)
window = MainWindow()
window.show()
app.exec()
I would like to place a QPixmap on another QPixmap. Both have the same size, so I would just like to make an overlay. The overlay image has a transparent elipse in the middle. I figure they should be QPixmap format, however I dont know how to place them on top of each other and keep them in place when resizing the window. This is my code displaying how my background images are placed. I have attached a image explaining what i want.
import sys
from PyQt5 import QtGui ,QtWidgets, uic
from PyQt5.QtCore import Qt
class Ergolab(QtWidgets.QMainWindow):
def __init__(self, *args, **kwargs):
super(Ergolab, self).__init__(*args, **kwargs)
# Load the UI Page
self.ui = uic.loadUi("mainwindow.ui",self)
self.pixmap1 = QtGui.QPixmap('C:/Users/Frede/Desktop/img1.jpg')
self.shoflexLLabel.setPixmap(self.pixmap1.scaled(self.shoflexLLabel.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation))
self.shoflexLLabel.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
self.shoflexLLabel.setMinimumSize(150, 150)
self.shoflexLLabel.resize(800, 600)
self.pixmap2 = QtGui.QPixmap('C:/Users/Frede/Desktop/img2.jpg')
self.shoflexRLabel.setPixmap(self.pixmap2.scaled(self.shoflexRLabel.size(), Qt.KeepAspectRatio, Qt.SmoothTransformation))
self.shoflexRLabel.setSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
self.shoflexRLabel.setMinimumSize(150, 150)
self.shoflexRLabel.resize(800, 600)
def resizeEvent(self, event):
scaledSize = self.shoflexLLabel.size()
if not self.shoflexLLabel.pixmap() or scaledSize != self.shoflexLLabel.pixmap().size():
self.updateLabel()
def updateLabel(self):
self.shoflexLLabel.setPixmap(self.pixmap1.scaled(
self.shoflexLLabel.size(), Qt.KeepAspectRatio,
Qt.SmoothTransformation))
self.shoflexRLabel.setPixmap(self.pixmap2.scaled(
self.shoflexRLabel.size(), Qt.KeepAspectRatio,
Qt.SmoothTransformation))
def main():
app = QtWidgets.QApplication(sys.argv)
main = Ergolab()
main.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
This is the result I would like:
You must use QPainter by setting the circle as a clip path:
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
label = QtWidgets.QLabel()
self.setCentralWidget(label)
base_pixmap = QtGui.QPixmap("background.png")
overlay_pixmap = QtGui.QPixmap("overlay.png")
radius = 300
r = QtCore.QRectF()
r.setSize(radius * QtCore.QSizeF(1, 1))
r.moveCenter(base_pixmap.rect().center())
path = QtGui.QPainterPath()
path.addEllipse(r)
painter = QtGui.QPainter(base_pixmap)
painter.setRenderHints(
QtGui.QPainter.Antialiasing | QtGui.QPainter.SmoothPixmapTransform
)
painter.setClipPath(path, QtCore.Qt.IntersectClip)
painter.drawPixmap(QtCore.QPoint(), overlay_pixmap)
painter.end()
label.setPixmap(base_pixmap)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())
I want to set the background for text, which means that I want to set the color of the rectangle contains the text. I have tested QPainter.setBackground, but it do not work. This is my code:
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class MyLabel(QLabel):
def __init__(self):
super(MyLabel, self).__init__()
self.setMinimumHeight(200)
self.setMinimumWidth(200)
def paintEvent(self, QPaintEvent):
super(MyLabel, self).paintEvent(QPaintEvent)
pos = QPoint(50, 50)
painter = QPainter(self)
brush = QBrush()
brush.setColor(QColor(255,0,0))
painter.setBackgroundMode(Qt.OpaqueMode)
painter.setBackground(brush)
painter.drawText(pos, 'hello,world')
class Window(QWidget):
def __init__(self):
super(Window, self).__init__()
layout = QHBoxLayout(self)
self.label = MyLabel()
layout.addWidget(self.label)
if __name__ == '__main__':
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())
What I want is:
Thanks for any help.
It is not necessary to implement a personalized QLabel, it is enough to set the background color through Qt Style Sheet, also do not use a layout if you want to establish a certain position
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
class Window(QtWidgets.QWidget):
def __init__(self):
super(Window, self).__init__()
self.label = QtWidgets.QLabel("hello,world", self)
self.label.adjustSize()
self.label.setStyleSheet(
"background-color: {};".format(QtGui.QColor(255, 0, 0).name())
)
self.label.move(QtCore.QPoint(50, 50))
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
window = Window()
window.resize(640, 480)
window.show()
sys.exit(app.exec_())
I'm using the QPushButton to load the UI. First -> Jumin -> Department -> next -> next I want to create the UI in order. The problem is that I can not load the third Department into the QMainwindow window. I do not know why
When you create a widget in QVBoxLayout, it changes the size of the widget according to the wallpaper like wxpython layout (wx.all). Can not change the position (move) and size (resize) by automatic centering?
import sys
from PyQt5.QtWidgets import *
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.center_widget = QWidget()
self.setCentralWidget(self.center_widget)
self.FirstUI()
def FirstUI(self):
self.btn1 = QPushButton('test1', self)
self.btn1.move(50, 50)
self.btn1.clicked.connect(self.btn1_click)
def JuminUI(self):
self.ju1 = QLineEdit('13')
self.btn2 = QPushButton('^^^^^^^^^^')
self.ju_text = QLabel('asd')
self.jumim_layout = QVBoxLayout()
self.jumim_layout.addWidget(self.ju_text)
self.jumim_layout.addWidget(self.ju1)
self.jumim_layout.addWidget(self.btn2)
self.centralWidget().setLayout(self.jumim_layout)
self.btn2.clicked.connect(self.btn2_click)
def DepartmentUI(self):
self.depart_layout = QVBoxLayout()
self.depart_layout.addWidget(QPushButton('sdfsdf'))
self.centralWidget().setLayout(self.depart_layout)
def btn1_click(self):
self.btn1.deleteLater()
self.JuminUI()
def btn2_click(self):
self.ju1.deleteLater()
self.btn2.deleteLater()
self.ju_text.deleteLater()
self.DepartmentUI()
if __name__ == "__main__":
app = QApplication(sys.argv)
fream = MainWindow()
fream.show()
app.exec_()
creating and removing widgets is almost always a bad idea, and your code falls into those bad ideas, it's always best to hide the widgets and for that you should use the QStackedWidget, what QStackedWidget does is just make a widget visible on all widgets that you have been assigned by changing the currentIndex.
import sys
from functools import partial
from PyQt5 import QtWidgets
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
self.center_widget = QtWidgets.QStackedWidget()
self.setCentralWidget(self.center_widget)
self.FirstUI()
self.JuminUI()
self.DepartmentUI()
def FirstUI(self):
widget = QtWidgets.QWidget()
self.btn1 = QtWidgets.QPushButton('test1', widget)
self.btn1.move(50, 50)
self.center_widget.addWidget(widget)
self.btn1.clicked.connect(partial(self.center_widget.setCurrentIndex, 1))
def JuminUI(self):
widget = QtWidgets.QWidget()
lay = QtWidgets.QVBoxLayout(widget)
self.ju1 = QtWidgets.QLineEdit('13')
self.btn2 = QtWidgets.QPushButton('^^^^^^^^^^')
self.ju_text = QtWidgets.QLabel('asd')
lay.addWidget(self.ju_text)
lay.addWidget(self.ju1)
lay.addWidget(self.btn2)
self.center_widget.addWidget(widget)
self.btn2.clicked.connect(partial(self.center_widget.setCurrentIndex, 2))
def DepartmentUI(self):
widget = QtWidgets.QWidget()
lay = QtWidgets.QVBoxLayout(widget)
lay.addWidget(QtWidgets.QPushButton('sdfsdf'))
self.center_widget.addWidget(widget)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
fream = MainWindow()
fream.show()
sys.exit(app.exec_())
In the GUI, the styling applied to the QLabel is applied only upto the height of the text in it. How do I increase it to fill the available region?
You can try something like this:
from PySide import QtGui, QtCore
import sys
class MainWindow(QtGui.QWidget):
def __init__(self):
super().__init__()
layout = QtGui.QHBoxLayout()
self.setLayout(layout)
label = QtGui.QLabel('5')
label.setAutoFillBackground(True)
p = label.palette()
p.setColor(label.backgroundRole(), QtCore.Qt.red)
label.setPalette(p)
layout.addWidget(label)
self.show()
def main():
app = QtGui.QApplication(sys.argv)
window = MainWindow()
sys.exit(app.exec_())
if __name__ == '__main__':
main()