2020-10-28 13:27:44 +00:00
|
|
|
"""
|
|
|
|
|
Resource list for mucking with DPIs on multiple screens:
|
|
|
|
|
|
|
|
|
|
- https://stackoverflow.com/questions/42141354/convert-pixel-size-to-point-size-for-fonts-on-multiple-platforms
|
|
|
|
|
- https://stackoverflow.com/questions/25761556/qt5-font-rendering-different-on-various-platforms/25929628#25929628
|
|
|
|
|
- https://doc.qt.io/qt-5/highdpi.html
|
|
|
|
|
- https://stackoverflow.com/questions/20464814/changing-dpi-scaling-size-of-display-make-qt-applications-font-size-get-rendere
|
|
|
|
|
- https://stackoverflow.com/a/20465247
|
|
|
|
|
- https://doc.qt.io/archives/qt-4.8/qfontmetrics.html#width
|
|
|
|
|
- https://forum.qt.io/topic/54136/how-do-i-get-the-qscreen-my-widget-is-on-qapplication-desktop-screen-returns-a-qwidget-and-qobject_cast-qscreen-returns-null/3
|
|
|
|
|
- https://forum.qt.io/topic/43625/point-sizes-are-they-reliable/4
|
|
|
|
|
- https://stackoverflow.com/questions/16561879/what-is-the-difference-between-logicaldpix-and-physicaldpix-in-qt
|
|
|
|
|
- https://doc.qt.io/qt-5/qguiapplication.html#screenAt
|
|
|
|
|
|
|
|
|
|
"""
|
|
|
|
|
|
2020-10-25 22:20:38 +00:00
|
|
|
from pyqtgraph import QtGui
|
|
|
|
|
from PyQt5.QtCore import (
|
|
|
|
|
Qt, QCoreApplication
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
# Proper high DPI scaling is available in Qt >= 5.6.0. This attibute
|
|
|
|
|
# must be set before creating the application
|
|
|
|
|
if hasattr(Qt, 'AA_EnableHighDpiScaling'):
|
|
|
|
|
QCoreApplication.setAttribute(Qt.AA_EnableHighDpiScaling, True)
|
|
|
|
|
|
|
|
|
|
if hasattr(Qt, 'AA_UseHighDpiPixmaps'):
|
|
|
|
|
QCoreApplication.setAttribute(Qt.AA_UseHighDpiPixmaps, True)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
app = QtGui.QApplication([])
|
|
|
|
|
window = QtGui.QMainWindow()
|
|
|
|
|
main_widget = QtGui.QWidget()
|
|
|
|
|
window.setCentralWidget(main_widget)
|
|
|
|
|
window.show()
|
|
|
|
|
|
|
|
|
|
pxr = main_widget.devicePixelRatioF()
|
|
|
|
|
|
|
|
|
|
# screen_num = app.desktop().screenNumber()
|
|
|
|
|
# screen = app.screens()[screen_num]
|
|
|
|
|
|
|
|
|
|
screen = app.screenAt(main_widget.geometry().center())
|
|
|
|
|
|
|
|
|
|
name = screen.name()
|
|
|
|
|
size = screen.size()
|
|
|
|
|
geo = screen.availableGeometry()
|
|
|
|
|
phydpi = screen.physicalDotsPerInch()
|
|
|
|
|
logdpi = screen.logicalDotsPerInch()
|
|
|
|
|
|
|
|
|
|
print(
|
|
|
|
|
# f'screen number: {screen_num}\n',
|
|
|
|
|
f'screen name: {name}\n'
|
|
|
|
|
f'screen size: {size}\n'
|
|
|
|
|
f'screen geometry: {geo}\n\n'
|
|
|
|
|
f'devicePixelRationF(): {pxr}\n'
|
|
|
|
|
f'physical dpi: {phydpi}\n'
|
|
|
|
|
f'logical dpi: {logdpi}\n'
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
print('-'*50)
|
|
|
|
|
|
|
|
|
|
screen = app.primaryScreen()
|
|
|
|
|
|
|
|
|
|
name = screen.name()
|
|
|
|
|
size = screen.size()
|
|
|
|
|
geo = screen.availableGeometry()
|
|
|
|
|
phydpi = screen.physicalDotsPerInch()
|
|
|
|
|
logdpi = screen.logicalDotsPerInch()
|
|
|
|
|
|
|
|
|
|
print(
|
|
|
|
|
# f'screen number: {screen_num}\n',
|
|
|
|
|
f'screen name: {name}\n'
|
|
|
|
|
f'screen size: {size}\n'
|
|
|
|
|
f'screen geometry: {geo}\n\n'
|
|
|
|
|
f'devicePixelRationF(): {pxr}\n'
|
|
|
|
|
f'physical dpi: {phydpi}\n'
|
|
|
|
|
f'logical dpi: {logdpi}\n'
|
|
|
|
|
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
# app-wide font
|
|
|
|
|
font = QtGui.QFont("Hack")
|
|
|
|
|
# use pixel size to be cross-resolution compatible?
|
|
|
|
|
font.setPixelSize(6)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
fm = QtGui.QFontMetrics(font)
|
|
|
|
|
fontdpi = fm.fontDpi()
|
|
|
|
|
font_h = fm.height()
|
|
|
|
|
|
|
|
|
|
string = '10000'
|
|
|
|
|
str_br = fm.boundingRect(string)
|
|
|
|
|
str_w = str_br.width()
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
print(
|
|
|
|
|
# f'screen number: {screen_num}\n',
|
|
|
|
|
f'font dpi: {fontdpi}\n'
|
|
|
|
|
f'font height: {font_h}\n'
|
|
|
|
|
f'string bounding rect: {str_br}\n'
|
|
|
|
|
f'string width : {str_w}\n'
|
|
|
|
|
)
|
