I have been making progress with my color converter/creation application built with PyQt. I just added a 4 point gradient tool this morning. This application will allow you to create, convert and manage all your colors in one place.

A PyQt5 application to convert colors from one color format to various others.

The PyQt pen join style defines how joins between two connected lines are shown.

1. The BevelJoin style fills the triangular notch between the two lines.

2. The MiterJoin style extends the lines to meet at an angle.

3. The RoundJoin style fills a circular arc between the two lines.

https://doc.qt.io/qtforpython-5/PySide2/QtGui/QPen.html#join-style

PyQt pen has cap styles that define how the end points of the lines are drawn.

1. The SquareCap (default) style is a square line end that covers the end point and extends beyond it by half the line width.

2. The FlatCap style is a square line end that does not cover the end point of the line.

3. The RoundCap style is a rounded line end covering the end point.

https://doc.qt.io/qtforpython-5/PySide2/QtGui/QPen.html#cap-style

PyQt provides several built-in pen styles.

1. SolidLine
2. DashLine
3. DotLine
4. DashDotLine
5. DashDotDotLine
6. CustomDashLine

https://doc.qt.io/qtforpython-5/PySide2/QtGui/QPen.html#pen-style

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QPainter is generally faster for simple, direct drawing operations while
QGraphicsScene is slower because it provides more options when managing larger number of 2D graphical items. QGraphicsScene provides optimized item lookup and spatial indexing.

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Hoy en un nuevo capitulo de "Intentando hacer algo util para no sobrepensar y deprimirme", he intentado crear un gestor de software estilo yast, que de gestor no tiene nada, este solo puede buscar, mostrar informacion del paquete y pretender instalar el paquete.

Lo cree con #PyQt por que se me hizo re facil a comparacion de gtk-rs (era mi opcion principal)

Pd: No es nada serio, solo revisen el titulo.

Minimizar al tray un programa hecho en PyQt5 https://myblog.clonbg.es/minimizar-al-tray-un-programa-hecho-en-pyqt5/ #Programación #PyQT #Python https://clonbg.es

Primeros pasos con PyQt y QtDesigner. Primer programa con Python https://myblog.clonbg.es/primeros-pasos-con-pyqt-y-qtdesigner-primer-programa-con-python/ #Programación #Python #PyQT https://clonbg.es

Mi primer CRUD con Python https://myblog.clonbg.es/mi-primer-crud-con-python/ #Programación #Python #PyQT https://clonbg.es

Mi primer CRUD con Python https://myblog.clonbg.es/mi-primer-crud-con-python/ #Programación #Python #PyQT https://clonbg.es

Minimizar al tray un programa hecho en PyQt5 https://myblog.clonbg.es/minimizar-al-tray-un-programa-hecho-en-pyqt5/ #Programación #PyQT #Python https://clonbg.es

So. I want to #pyqtgraph plot some colored items with medium alphas and then overlap them to produce the usual kindergarten color wheel results.

But it turns out that #pyqt only supports compositing in the RGB #color space.

In fact, the Wikipedia article makes it sound like alpha blending is only even *defined* for RGB. Which I guess makes sense for speed reasons, but I'd still expect some way to put in a callback or whatever for a custom mode.

I guess what I'll do it do all the HSV and compositing work in a #python #numpy array and the convert to an RGB image and display it that way...?

Unless there's a better idea?

Primeros pasos con PyQt y QtDesigner. Primer programa con Python https://myblog.clonbg.es/primeros-pasos-con-pyqt-y-qtdesigner-primer-programa-con-python/ #Programación #Python #PyQT https://clonbg.es