utils-qt-mk 1.0.7

Collection of utilities for Qt applications

Utilities

Overview

A package for collecting utilities I usually use in my Qt-projects in Python. Some modules depend on others but some can be used on their own. Some modules might have stub files to assist development, but they always contain an initializer function to create the necessary stub files if they are missing when the module is first imported. The functionality of subclasses of QDialog are also available as subclasses of QDockWidget (floating, same-window dialogs). There are no set goals for this project other than having these things in one place, in a structured manner.

The package can be used as follows:

from utils_qt_mk.colours import ColourSelector

Contents

_general

General functions, classes etc. mostly for internal use in other parts of the package. Modules usually depend on it.

colours

Adds the standard R colour palette to Qt applications. It provides a singleton object named Colours, with attribute access to all the colours of R's colors() function. These can be conveniently selected from a colour selector dialog, either from a drop-down list (by name) or from a grid (by visual selection). Based on this selector there is a colour scale creator dialog, where from a number of selected colours and set number of steps a colour scale can be defined for further use e.g. for plotting. It optionally uses theme: if the module can be imported, the dialogs can have a theme.

To get a list of QColor objects from an existing scale, use the scale_json_to_list() function.

creators

Provides a simple way to use creators of other modules. Importing and running the creator_centre() function open the Creator Centre, a simple app where all these creators are available. If new file dialogs or message boxes are defined, the stub file must be deleted so the new types could be included (might become automatic in the future).

custom_file_dialog

Provides predefined file dialogs (PathTypes singleton) customized by a JSON file and a creator dialog. In the latter, a custom dialog could be defined, setting its type (source/destination), window title, dialog type (to open/save a file or open an existing directory), extension filter and associated path. Another function of these dialogs is to provide navigation history: if a path is successfully selected, the JSON file gets updated with it.

To get a list of available path types, use the get_path_types() function.

message

Provides predefined message boxes (MessageBoxType singleton) that can have a theme assigned (so it depends on theme) and a creator dialog. In the latter, a custom message box can be defined, setting its category (e.g. warning), window title and message (text content of the message box). A 'custom' category message box can also have its icon, buttons and flags set.

To get a list of available messagebox types, use the get_messagebox_types() function.

progress_dialog

Provides a cancellable, optionally nested progress dialog, reporting on a compatible process ran by a QObject-subclass on a separate thread. It also has a (package private) example of a compatible worker object. It optionally uses theme: if the module can be imported, it can use the preset themes.

theme

Provides a simple way to apply a predefined theme to Qt-widgets. It also adds a singleton object named WidgetTheme that has attribute access to all the defined themes. The set_widget_theme() function uses this singleton to select a theme.

To get a list of available themes, use the get_theme_types() function.

theme_creator

Depends on theme and colours to provide a theme creator dialog. It provides a simple interface to edit and preview existing themes or to create new ones.

widget_mix

A module for a mix of custom widgets. It currently contains:

• WheelEventFilter
• WidgetListWidget
• ListMixin