Projects/Usability/HIG

Introduction

Human interface guidelines (HIG) are software development documents that offer application developers a set of recommendations. Their aim is to improve the experience for users by making application interfaces more consistent and hence more intuitive and learnable.

Learn more about the philosophy behind the KDE HIG

Structure

Conceptual Model

• Have a clear vision what your application will achieve and what not.
• Meet the needs of KDE's personas in your application.
• Define a scenario where persona(s) interact with your application.
• Specify requirements considering destinata and animata of users.

Design Vision and Principles

• Get to know the design vision and principles for KDE Applications and Workspaces.

Task Flow

• Users should be able to complete tasks in natural work flow.
• Carefully consider command structure of the application.

Organizational Model

• Carefully consider the content structure and select an appropriate navigation pattern for the application.
• Central configuration
• Notification mechanism
• Minimize to tray
• Processing of passwords

Pattern

Widget based

• Implement a search as common pattern.

Controls

Baxley calls this section 'behavior'...

Viewing and Navigation

Access functions

• Apply a menu bar to every standard application.
• Try to omit the status bar from your application.
• Provide a context menu for controls with implicit functions.
• Provide a toolbar for frequently used functions.
• Use a push button to initiate an action when the user clicks it.
• Use a toogle button to indicate a state, preferably in toolbars only.
• Use a command link to navigate between pages.
• Support keyboard access by accelerators and shortcuts.
• Follow the guidelines for dialogs for secondary windows.

Grouping

• Arrange associated controls by using a labeled group box or an unlabeled frame.
• Allow users to resize aligned groups by placing a splitter between the groups.
• Use tabs to show related information on separate pages.
• Provide an accordion (aka tool box) for different views to content.

Complex views

• Use a list view to show some items out of one category.
• Use a tree view to show items with a single, natural, hierarchical categorization.
• If you really need to create your own widget follow the guidelines for custom controls.
• Double check the guidelines about plotting diagram/charts.

Editing and Manipulation

Selection

• Use radio buttons for selection of 1 out of a few items.
• Use one or more check boxes for clear options or to select items out of a small number of options.
• Use a drop-down list for selection of 1 out of a small number of items.
• Use a combo box to select 1 out of a small number of items where users should be able to add items.
• Use a list view to select 1 singular item out of a potentially big list.
• Apply the dual list pattern for several selections out of a large number of (multiple) items.

Unconstrained input

• Provide a line edit to enter one line of text.
• Provide a text edit to enter multiple lines of texts.
• Use a table view to arrange data in rows and columns with inline editing feature.

Constrained input

• Use a spin box for numerical input within a range and with fix steps.
• Use a slider for arbitrary changes within a defined range.
• Apply the slider and spin box pattern for numeric input with both large changes and precise control.
• Use date and time pickers for formatted input of datum, time of day, or periods etc.

User Assistance

User-driven information

• Provide tool-tips for user driven information.

System triggered notification

• Provide a message panel to inform users about non-critical problems.
• Use a notification as system-triggered message to inform about events out of the current context.
• Show a progress indicator for lengthy actions.

Disruptive messages

• Show a modal message dialog if the processing has reached an unexpected condition that needs interaction.

Help system

• Support the user by an elaborated interface or per help system.

Presentation

Become familiar with design vision and principles to understand how the visual design plays its role in fulfilling them.

Style

The following style elements provide a palette to express your own unique vision while preserving the shared design vision.

• Use colors consistently.
• Ensure backgrounds and edges honor the design vision.
• Icon design and use should be consistent throughout the interface.
• Use low level animations to support usability.
• Layout visual elements by considering both application function and content.
• Treat typography with the same care as any other aspect of the visual design.
  • Keep wording consistent and easy to understand.
  • Understand when and where to apply capitalization.
  • Apply standard control labels in your app.
  • Use static text for main instruction and supplemental information.
  • Account for localization of your project.

Building blocks

• Building blocks help make it easier to design applications that satisfy the design vision without needing to always create your own custom UI elements.

Visual Design Tools and Resources

• Try the mock-up toolkit which includes UI controls stencils, color swatches and fonts to help create the visual design your application.
• Ask for help and share your visual design ideas on the KDE Visual Design Group forum.

Contributing

Didn't find what you were looking for?

A guide to the guide can be found at the about page.

Our Human Interface Guidelines are a work in progress and we need your help. Visit the Contributing page to report problems or get involved.

See also

• The mockup toolkit provides each Building Block UI element and sample mocked applications
• KDE HIG for Plasma Active
• KDE HIG for Plasma Netbook
• Guidelines for Designing User Interface Software (Smith & Mosier, 1986)
• Microsoft Windows User Experience Interaction Guidelines
• Mac OS X Human Interface Guidelines
• GNOME Human Interface Guidelines (v2.2.3)
• elementary OS HIG
• Android User Interface Guidelines