PSF GSoC students blogs: Google Summer of Code Final Work Product

Google Summer of Code Final Work Product

• Name: Soham Biswas
• Organisation: Python Software Foundation
• Sub-organisation: FURY
• Project: FURY - Create new UI Widgets & Physics Engine Integration

Proposed Objectives

• ComboBox
• Tab UI
• File Dialog Improvements

Modified Objectives

• ComboBox
• Tab UI
• File Dialog Improvements
• Double Click Callback
• TextBlock2D Improvements
• Scrollbars as a Standalone Component
• Physics Engine Integration

Objectives Completed

• ComboBox2D UI Component

A combobox is a commonly used graphical user interface widget. Traditionally, it is a combination of a drop-down list or list box and a single-line textbox, allowing the user to select a value from the list. The term "combo box" is sometimes used to mean "drop-down list". Respective components, tests and tutorials were created. 

Pull Requests:

• ComboBox UI Component: https://ift.tt/3jcrhw7
• ComboBox UI Tutorial: https://ift.tt/3lkLodl

 

• Tab UI Component

In interface design, a tabbed document interface or Tab is a graphical control element that allows multiple documents or panels to be contained within a single window, using tabs as a navigational widget for switching between sets of documents. Respective components, tests and tutorials were created.

Pull Requests:

• Tab UI component: https://ift.tt/3jgsfHY
• Tab UI tutorial: https://ift.tt/2YygNzm

 

• Double Click Callback

Double click callbacks aren't implemented in VTK by default so they need to be implemented manually. With my mentor's help I was able to implement double click callbacks for all the three mouse buttons successfully.

Pull Requests:

• Adding Double Click Callback: https://ift.tt/2YygO6o

 

• TextBlock2D Improvements

The previous implementation of `TextBlock2D` was lacking a few features such as size arguments and text overflow. There was no specific way to create Texts occupying a said height or width area. Apart from that UI components like `ListBoxItem2D`, `FileMenu2D` etc had an issue where text would overflow from their specified width. In order to tackle these problems, a modification was done to `TextBlock2D` to accept size as an argument and a new method was added to clip overflowing text based on a specified width and to replace the overflowing characters with `...`.

Pull Requests:

• Setting Bounding Box for TextBlock2D: https://ift.tt/31rfB2p
• Clip Text Overflow: https://ift.tt/2QmAR30

 

• Physics Engine Integration

Optional support for Physics engine integration of Pybullet was added to Fury. Pybullet's engine was used for the simulations and FURY was used for rendering the said simulations. Exhaustive examples were added to demonstrate various types of physics simulations possible using pybullet and fury. The said examples are as follows:

• Brick Wall Simulation
  • Explains how to render and simulate external forces, objects and gravity.
• Ball Collision Simulation
  • Explains how collisions work and how to detect said collisions.
• Chain Simulation
  • Explains how to render and simulate joints.
• Wrecking Ball Simulation
  • A more complicated simulation that combines concepts explained by the other examples.

Apart from that, a document was created to explain the integration process between pybullet and fury in detail.

Pull Requests:

• Physics Simulation Examples: https://ift.tt/34A1z0u
• Fury-Pybullet Integration Docs: https://ift.tt/3aVfsYa

Objectives in Progress

• Scrollbars as a standalone component

The previous implementation of scrollbars were hard coded into `ListBox2D`. Therefore, it was not possible to use scrollbars with any other UI component. Apart from that, scrollbars in terms of design were limited. Creating a horizontal scrollbar was not possible. The objective of this PR is to make scrollbars separate so that other UI elements can also make use of it.

Currently, the skeletal and design aspects of the scrollbars are implemented but the combination of scrollbars with other UI components are still in progress.

Pull Requests:

• Scrollbars as a Standalone API: https://ift.tt/31q4Ey8

 

• File Dialog Improvements

Currently, we have access to `FileMenu2D` which allows us to navigate through the filesystem but it does not provide a user friendly Dialog to read and write files in Fury. Hence the idea is to create a file dialog which can easily open or save file at runtime. As of now, `Open` and `Save` operations are implemented. Corresponding tests and tutorials are in progress.

Pull Requests:

• File Dialog UI component: https://ift.tt/32nZjqt

Other Objectives

• Radio Checkbox Tutorial using FURY API

The objects for Radio button and Checkbox tutorial were rendered using VTK's method by a fellow contributor so I decided to replace them with native FURY API. The methods were rewritten keeping the previous commits intact.

Pull Requests:

• Radio Checkbox tutorial using FURY API: https://ift.tt/32nTtpd

 

• GSoC weekly Blogs

Weekly blogs were added for FURY's Website.

Pull Requests:

• First & Second Evaluation: https://ift.tt/2QrN5HC
• Third Evaluation: https://ift.tt/32s5Q3x

 

Timeline

Date	Description	Blog Link
30-05-2020	Welcome to my GSoC Blog!!	Weekly Check-in #1
07-06-2020	First Week of Coding!!	Weekly Check-in #2
14-06-2020	ComboBox2D Progress!!	Weekly Check-in #3
21-06-2020	TextBlock2D Progress!!	Weekly Check-in #4
28-06-2020	May the Force be with you!!	Weekly Check-in #5
05-07-2020	Translation, Reposition, Rotation.	Weekly Check-in #6
12-07-2020	Orientation, Sizing, Tab UI.	Weekly Check-in #7
19-07-2020	ComboBox2D, TextBlock2D, Clipping Overflow.	Weekly Check-in #8
26-07-2020	Tab UI, TabPanel2D, Tab UI Tutorial.	Weekly Check-in #9
02-08-2020	Single Actor, Physics, Scrollbars.	Weekly Check-in #10
09-08-2020	Chain Simulation, Scrollbar Refactor, Tutorial Update.	Weekly Check-in #11
16-08-2020	Wrecking Ball Simulation, Scrollbars Update, Physics Tutorials.	Weekly Check-in #12
23-08-2020	Part of the Journey is the end unless its Open Source!	Weekly Check-in #13

Detailed weekly tasks and work done can be found here.

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